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nios2 target support

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Merge remote-tracking branch 'remotes/rth/tags/pull-nios-20170124' into staging

nios2 target support

# gpg: Signature made Tue 24 Jan 2017 21:11:47 GMT
# gpg:                using RSA key 0xAD1270CC4DD0279B
# gpg: Good signature from "Richard Henderson <rth7680@gmail.com>"
# gpg:                 aka "Richard Henderson <rth@redhat.com>"
# gpg:                 aka "Richard Henderson <rth@twiddle.net>"
# Primary key fingerprint: 9CB1 8DDA F8E8 49AD 2AFC  16A4 AD12 70CC 4DD0 279B

* remotes/rth/tags/pull-nios-20170124:
  nios2: Add support for Nios-II R1
  nios2: Add Altera 10M50 GHRD emulation
  nios2: Add periodic timer emulation
  nios2: Add IIC interrupt controller emulation
  nios2: Add usermode binaries emulation
  nios2: Add disas entries
  nios2: Add architecture emulation support

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2017-01-25 13:30:23 +00:00
commit ae5045ae5b
40 changed files with 7727 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
MAINTAINERS
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@ -187,6 +187,14 @@ F: disas/moxie.c
F: hw/moxie/
F: default-configs/moxie-softmmu.mak
NiosII
M: Chris Wulff <crwulff@gmail.com>
M: Marek Vasut <marex@denx.de>
S: Maintained
F: target/nios2/
F: hw/nios2/
F: disas/nios2.c
OpenRISC
M: Jia Liu <proljc@gmail.com>
S: Maintained

2
arch_init.c
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@ -63,6 +63,8 @@ int graphic_depth = 32;
#define QEMU_ARCH QEMU_ARCH_MIPS
#elif defined(TARGET_MOXIE)
#define QEMU_ARCH QEMU_ARCH_MOXIE
#elif defined(TARGET_NIOS2)
#define QEMU_ARCH QEMU_ARCH_NIOS2
#elif defined(TARGET_OPENRISC)
#define QEMU_ARCH QEMU_ARCH_OPENRISC
#elif defined(TARGET_PPC)

5
configure vendored
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@ -5935,6 +5935,8 @@ case "$target_name" in
;;
moxie)
;;
nios2)
;;
or32)
TARGET_ARCH=openrisc
TARGET_BASE_ARCH=openrisc
@ -6140,6 +6142,9 @@ for i in $ARCH $TARGET_BASE_ARCH ; do
moxie*)
disas_config "MOXIE"
;;
nios2)
disas_config "NIOS2"
;;
or32)
disas_config "OPENRISC"
;;

1
default-configs/nios2-linux-user.mak Normal file
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@ -0,0 +1 @@
# Default configuration for nios2-linux-user

6
default-configs/nios2-softmmu.mak Normal file
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@ -0,0 +1,6 @@
# Default configuration for nios2-softmmu
CONFIG_NIOS2=y
CONFIG_SERIAL=y
CONFIG_PTIMER=y
CONFIG_ALTERA_TIMER=y

1
disas/Makefile.objs
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@ -15,6 +15,7 @@ common-obj-$(CONFIG_IA64_DIS) += ia64.o
common-obj-$(CONFIG_M68K_DIS) += m68k.o
common-obj-$(CONFIG_MICROBLAZE_DIS) += microblaze.o
common-obj-$(CONFIG_MIPS_DIS) += mips.o
common-obj-$(CONFIG_NIOS2_DIS) += nios2.o
common-obj-$(CONFIG_MOXIE_DIS) += moxie.o
common-obj-$(CONFIG_PPC_DIS) += ppc.o
common-obj-$(CONFIG_S390_DIS) += s390.o

3534
disas/nios2.c Normal file
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File diff suppressed because it is too large Load Diff

1
hw/intc/Makefile.objs
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@ -41,3 +41,4 @@ obj-$(CONFIG_S390_FLIC_KVM) += s390_flic_kvm.o
obj-$(CONFIG_ASPEED_SOC) += aspeed_vic.o
obj-$(CONFIG_ARM_GIC) += arm_gicv3_cpuif.o
obj-$(CONFIG_MIPS_CPS) += mips_gic.o
obj-$(CONFIG_NIOS2) += nios2_iic.o

103
hw/intc/nios2_iic.c Normal file
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@ -0,0 +1,103 @@
/*
* QEMU Altera Internal Interrupt Controller.
*
* Copyright (c) 2012 Chris Wulff <crwulff@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "qapi/error.h"
#include "hw/sysbus.h"
#include "cpu.h"
#define TYPE_ALTERA_IIC "altera,iic"
#define ALTERA_IIC(obj) \
OBJECT_CHECK(AlteraIIC, (obj), TYPE_ALTERA_IIC)
typedef struct AlteraIIC {
SysBusDevice parent_obj;
void *cpu;
qemu_irq parent_irq;
} AlteraIIC;
static void update_irq(AlteraIIC *pv)
{
CPUNios2State *env = &((Nios2CPU *)(pv->cpu))->env;
qemu_set_irq(pv->parent_irq,
env->regs[CR_IPENDING] & env->regs[CR_IENABLE]);
}
static void irq_handler(void *opaque, int irq, int level)
{
AlteraIIC *pv = opaque;
CPUNios2State *env = &((Nios2CPU *)(pv->cpu))->env;
env->regs[CR_IPENDING] &= ~(1 << irq);
env->regs[CR_IPENDING] |= !!level << irq;
update_irq(pv);
}
static void altera_iic_init(Object *obj)
{
AlteraIIC *pv = ALTERA_IIC(obj);
qdev_init_gpio_in(DEVICE(pv), irq_handler, 32);
sysbus_init_irq(SYS_BUS_DEVICE(obj), &pv->parent_irq);
}
static Property altera_iic_properties[] = {
DEFINE_PROP_PTR("cpu", AlteraIIC, cpu),
DEFINE_PROP_END_OF_LIST(),
};
static void altera_iic_realize(DeviceState *dev, Error **errp)
{
struct AlteraIIC *pv = ALTERA_IIC(dev);
if (!pv->cpu) {
error_setg(errp, "altera,iic: CPU not connected");
return;
}
}
static void altera_iic_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->props = altera_iic_properties;
/* Reason: pointer property "cpu" */
dc->cannot_instantiate_with_device_add_yet = true;
dc->realize = altera_iic_realize;
}
static TypeInfo altera_iic_info = {
.name = "altera,iic",
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(AlteraIIC),
.instance_init = altera_iic_init,
.class_init = altera_iic_class_init,
};
static void altera_iic_register(void)
{
type_register_static(&altera_iic_info);
}
type_init(altera_iic_register)

126
hw/nios2/10m50_devboard.c Normal file
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@ -0,0 +1,126 @@
/*
* Altera 10M50 Nios2 GHRD
*
* Copyright (c) 2016 Marek Vasut <marek.vasut@gmail.com>
*
* Based on LabX device code
*
* Copyright (c) 2012 Chris Wulff <crwulff@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "cpu.h"
#include "hw/sysbus.h"
#include "hw/hw.h"
#include "hw/char/serial.h"
#include "sysemu/sysemu.h"
#include "hw/boards.h"
#include "exec/memory.h"
#include "exec/address-spaces.h"
#include "qemu/config-file.h"
#include "boot.h"
#define BINARY_DEVICE_TREE_FILE "10m50-devboard.dtb"
static void nios2_10m50_ghrd_init(MachineState *machine)
{
Nios2CPU *cpu;
DeviceState *dev;
MemoryRegion *address_space_mem = get_system_memory();
MemoryRegion *phys_tcm = g_new(MemoryRegion, 1);
MemoryRegion *phys_tcm_alias = g_new(MemoryRegion, 1);
MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
MemoryRegion *phys_ram_alias = g_new(MemoryRegion, 1);
ram_addr_t tcm_base = 0x0;
ram_addr_t tcm_size = 0x1000; /* 1 kiB, but QEMU limit is 4 kiB */
ram_addr_t ram_base = 0x08000000;
ram_addr_t ram_size = 0x08000000;
qemu_irq *cpu_irq, irq[32];
int i;
/* Physical TCM (tb_ram_1k) with alias at 0xc0000000 */
memory_region_init_ram(phys_tcm, NULL, "nios2.tcm", tcm_size, &error_abort);
memory_region_init_alias(phys_tcm_alias, NULL, "nios2.tcm.alias",
phys_tcm, 0, tcm_size);
vmstate_register_ram_global(phys_tcm);
memory_region_add_subregion(address_space_mem, tcm_base, phys_tcm);
memory_region_add_subregion(address_space_mem, 0xc0000000 + tcm_base,
phys_tcm_alias);
/* Physical DRAM with alias at 0xc0000000 */
memory_region_init_ram(phys_ram, NULL, "nios2.ram", ram_size, &error_abort);
memory_region_init_alias(phys_ram_alias, NULL, "nios2.ram.alias",
phys_ram, 0, ram_size);
vmstate_register_ram_global(phys_ram);
memory_region_add_subregion(address_space_mem, ram_base, phys_ram);
memory_region_add_subregion(address_space_mem, 0xc0000000 + ram_base,
phys_ram_alias);
/* Create CPU -- FIXME */
cpu = cpu_nios2_init("nios2");
/* Register: CPU interrupt controller (PIC) */
cpu_irq = nios2_cpu_pic_init(cpu);
/* Register: Internal Interrupt Controller (IIC) */
dev = qdev_create(NULL, "altera,iic");
qdev_prop_set_ptr(dev, "cpu", cpu);
qdev_init_nofail(dev);
sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, cpu_irq[0]);
for (i = 0; i < 32; i++) {
irq[i] = qdev_get_gpio_in(dev, i);
}
/* Register: Altera 16550 UART */
serial_mm_init(address_space_mem, 0xf8001600, 2, irq[1], 115200,
serial_hds[0], DEVICE_NATIVE_ENDIAN);
/* Register: Timer sys_clk_timer */
dev = qdev_create(NULL, "ALTR.timer");
qdev_prop_set_uint32(dev, "clock-frequency", 75 * 1000000);
qdev_init_nofail(dev);
sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, 0xf8001440);
sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, irq[0]);
/* Register: Timer sys_clk_timer_1 */
dev = qdev_create(NULL, "ALTR.timer");
qdev_prop_set_uint32(dev, "clock-frequency", 75 * 1000000);
qdev_init_nofail(dev);
sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, 0xe0000880);
sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, irq[5]);
/* Configure new exception vectors and reset CPU for it to take effect. */
cpu->reset_addr = 0xd4000000;
cpu->exception_addr = 0xc8000120;
cpu->fast_tlb_miss_addr = 0xc0000100;
nios2_load_kernel(cpu, ram_base, ram_size, machine->initrd_filename,
BINARY_DEVICE_TREE_FILE, NULL);
}
static void nios2_10m50_ghrd_machine_init(struct MachineClass *mc)
{
mc->desc = "Altera 10M50 GHRD Nios II design";
mc->init = nios2_10m50_ghrd_init;
mc->is_default = 1;
}
DEFINE_MACHINE("10m50-ghrd", nios2_10m50_ghrd_machine_init);

1
hw/nios2/Makefile.objs Normal file
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@ -0,0 +1 @@
obj-y = boot.o cpu_pic.o 10m50_devboard.o

223
hw/nios2/boot.c Normal file
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@ -0,0 +1,223 @@
/*
* Nios2 kernel loader
*
* Copyright (c) 2016 Marek Vasut <marek.vasut@gmail.com>
*
* Based on microblaze kernel loader
*
* Copyright (c) 2012 Peter Crosthwaite <peter.crosthwaite@petalogix.com>
* Copyright (c) 2012 PetaLogix
* Copyright (c) 2009 Edgar E. Iglesias.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "cpu.h"
#include "qemu/option.h"
#include "qemu/config-file.h"
#include "qemu/error-report.h"
#include "qemu-common.h"
#include "sysemu/device_tree.h"
#include "sysemu/sysemu.h"
#include "hw/loader.h"
#include "elf.h"
#include "qemu/cutils.h"
#include "boot.h"
#define NIOS2_MAGIC 0x534f494e
static struct nios2_boot_info {
void (*machine_cpu_reset)(Nios2CPU *);
uint32_t bootstrap_pc;
uint32_t cmdline;
uint32_t initrd_start;
uint32_t initrd_end;
uint32_t fdt;
} boot_info;
static void main_cpu_reset(void *opaque)
{
Nios2CPU *cpu = opaque;
CPUState *cs = CPU(cpu);
CPUNios2State *env = &cpu->env;
cpu_reset(CPU(cpu));
env->regs[R_ARG0] = NIOS2_MAGIC;
env->regs[R_ARG1] = boot_info.initrd_start;
env->regs[R_ARG2] = boot_info.fdt;
env->regs[R_ARG3] = boot_info.cmdline;
cpu_set_pc(cs, boot_info.bootstrap_pc);
if (boot_info.machine_cpu_reset) {
boot_info.machine_cpu_reset(cpu);
}
}
static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
{
return addr - 0xc0000000LL;
}
static int nios2_load_dtb(struct nios2_boot_info bi, const uint32_t ramsize,
const char *kernel_cmdline, const char *dtb_filename)
{
int fdt_size;
void *fdt = NULL;
int r;
if (dtb_filename) {
fdt = load_device_tree(dtb_filename, &fdt_size);
}
if (!fdt) {
return 0;
}
if (kernel_cmdline) {
r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
kernel_cmdline);
if (r < 0) {
fprintf(stderr, "couldn't set /chosen/bootargs\n");
}
}
if (bi.initrd_start) {
qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
translate_kernel_address(NULL, bi.initrd_start));
qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
translate_kernel_address(NULL, bi.initrd_end));
}
cpu_physical_memory_write(bi.fdt, fdt, fdt_size);
return fdt_size;
}
void nios2_load_kernel(Nios2CPU *cpu, hwaddr ddr_base,
uint32_t ramsize,
const char *initrd_filename,
const char *dtb_filename,
void (*machine_cpu_reset)(Nios2CPU *))
{
QemuOpts *machine_opts;
const char *kernel_filename;
const char *kernel_cmdline;
const char *dtb_arg;
char *filename = NULL;
machine_opts = qemu_get_machine_opts();
kernel_filename = qemu_opt_get(machine_opts, "kernel");
kernel_cmdline = qemu_opt_get(machine_opts, "append");
dtb_arg = qemu_opt_get(machine_opts, "dtb");
/* default to pcbios dtb as passed by machine_init */
if (!dtb_arg) {
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename);
}
boot_info.machine_cpu_reset = machine_cpu_reset;
qemu_register_reset(main_cpu_reset, cpu);
if (kernel_filename) {
int kernel_size, fdt_size;
uint64_t entry, low, high;
uint32_t base32;
int big_endian = 0;
#ifdef TARGET_WORDS_BIGENDIAN
big_endian = 1;
#endif
/* Boots a kernel elf binary. */
kernel_size = load_elf(kernel_filename, NULL, NULL,
&entry, &low, &high,
big_endian, EM_ALTERA_NIOS2, 0, 0);
base32 = entry;
if (base32 == 0xc0000000) {
kernel_size = load_elf(kernel_filename, translate_kernel_address,
NULL, &entry, NULL, NULL,
big_endian, EM_ALTERA_NIOS2, 0, 0);
}
/* Always boot into physical ram. */
boot_info.bootstrap_pc = ddr_base + 0xc0000000 + (entry & 0x07ffffff);
/* If it wasn't an ELF image, try an u-boot image. */
if (kernel_size < 0) {
hwaddr uentry, loadaddr;
kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0,
NULL, NULL);
boot_info.bootstrap_pc = uentry;
high = loadaddr + kernel_size;
}
/* Not an ELF image nor an u-boot image, try a RAW image. */
if (kernel_size < 0) {
kernel_size = load_image_targphys(kernel_filename, ddr_base,
ram_size);
boot_info.bootstrap_pc = ddr_base;
high = ddr_base + kernel_size;
}
high = ROUND_UP(high, 1024 * 1024);
/* If initrd is available, it goes after the kernel, aligned to 1M. */
if (initrd_filename) {
int initrd_size;
uint32_t initrd_offset;
boot_info.initrd_start = high;
initrd_offset = boot_info.initrd_start - ddr_base;
initrd_size = load_ramdisk(initrd_filename,
boot_info.initrd_start,
ram_size - initrd_offset);
if (initrd_size < 0) {
initrd_size = load_image_targphys(initrd_filename,
boot_info.initrd_start,
ram_size - initrd_offset);
}
if (initrd_size < 0) {
error_report("qemu: could not load initrd '%s'",
initrd_filename);
exit(EXIT_FAILURE);
}
high += initrd_size;
}
high = ROUND_UP(high, 4);
boot_info.initrd_end = high;
/* Device tree must be placed right after initrd (if available) */
boot_info.fdt = high;
fdt_size = nios2_load_dtb(boot_info, ram_size, kernel_cmdline,
/* Preference a -dtb argument */
dtb_arg ? dtb_arg : filename);
high += fdt_size;
/* Kernel command is at the end, 4k aligned. */
boot_info.cmdline = ROUND_UP(high, 4096);
if (kernel_cmdline && strlen(kernel_cmdline)) {
pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
}
}
g_free(filename);
}

11
hw/nios2/boot.h Normal file
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@ -0,0 +1,11 @@
#ifndef NIOS2_BOOT_H
#define NIOS2_BOOT_H
#include "hw/hw.h"
#include "cpu.h"
void nios2_load_kernel(Nios2CPU *cpu, hwaddr ddr_base, uint32_t ramsize,
const char *initrd_filename, const char *dtb_filename,
void (*machine_cpu_reset)(Nios2CPU *));
#endif /* NIOS2_BOOT_H */

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hw/nios2/cpu_pic.c Normal file
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@ -0,0 +1,70 @@
/*
* Altera Nios2 CPU PIC
*
* Copyright (c) 2016 Marek Vasut <marek.vasut@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "cpu.h"
#include "qemu/config-file.h"
#include "boot.h"
static void nios2_pic_cpu_handler(void *opaque, int irq, int level)
{
Nios2CPU *cpu = opaque;
CPUNios2State *env = &cpu->env;
CPUState *cs = CPU(cpu);
int type = irq ? CPU_INTERRUPT_NMI : CPU_INTERRUPT_HARD;
if (type == CPU_INTERRUPT_HARD) {
env->irq_pending = level;
if (level && (env->regs[CR_STATUS] & CR_STATUS_PIE)) {
env->irq_pending = 0;
cpu_interrupt(cs, type);
} else if (!level) {
env->irq_pending = 0;
cpu_reset_interrupt(cs, type);
}
} else {
if (level) {
cpu_interrupt(cs, type);
} else {
cpu_reset_interrupt(cs, type);
}
}
}
void nios2_check_interrupts(CPUNios2State *env)
{
Nios2CPU *cpu = nios2_env_get_cpu(env);
CPUState *cs = CPU(cpu);
if (env->irq_pending) {
env->irq_pending = 0;
cpu_interrupt(cs, CPU_INTERRUPT_HARD);
}
}
qemu_irq *nios2_cpu_pic_init(Nios2CPU *cpu)
{
return qemu_allocate_irqs(nios2_pic_cpu_handler, cpu, 2);
}

1
hw/timer/Makefile.objs
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@ -18,6 +18,7 @@ common-obj-$(CONFIG_IMX) += imx_gpt.o
common-obj-$(CONFIG_LM32) += lm32_timer.o
common-obj-$(CONFIG_MILKYMIST) += milkymist-sysctl.o
obj-$(CONFIG_ALTERA_TIMER) += altera_timer.o
obj-$(CONFIG_EXYNOS4) += exynos4210_mct.o
obj-$(CONFIG_EXYNOS4) += exynos4210_pwm.o
obj-$(CONFIG_EXYNOS4) += exynos4210_rtc.o

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hw/timer/altera_timer.c Normal file
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@ -0,0 +1,237 @@
/*
* QEMU model of the Altera timer.
*
* Copyright (c) 2012 Chris Wulff <crwulff@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "qapi/error.h"
#include "hw/sysbus.h"
#include "sysemu/sysemu.h"
#include "hw/ptimer.h"
#define R_STATUS 0
#define R_CONTROL 1
#define R_PERIODL 2
#define R_PERIODH 3
#define R_SNAPL 4
#define R_SNAPH 5
#define R_MAX 6
#define STATUS_TO 0x0001
#define STATUS_RUN 0x0002
#define CONTROL_ITO 0x0001
#define CONTROL_CONT 0x0002
#define CONTROL_START 0x0004
#define CONTROL_STOP 0x0008
#define TYPE_ALTERA_TIMER "ALTR.timer"
#define ALTERA_TIMER(obj) \
OBJECT_CHECK(AlteraTimer, (obj), TYPE_ALTERA_TIMER)
typedef struct AlteraTimer {
SysBusDevice busdev;
MemoryRegion mmio;
qemu_irq irq;
uint32_t freq_hz;
QEMUBH *bh;
ptimer_state *ptimer;
uint32_t regs[R_MAX];
} AlteraTimer;
static int timer_irq_state(AlteraTimer *t)
{
bool irq = (t->regs[R_STATUS] & STATUS_TO) &&
(t->regs[R_CONTROL] & CONTROL_ITO);
return irq;
}
static uint64_t timer_read(void *opaque, hwaddr addr,
unsigned int size)
{
AlteraTimer *t = opaque;
uint64_t r = 0;
addr >>= 2;
switch (addr) {
case R_CONTROL:
r = t->regs[R_CONTROL] & (CONTROL_ITO | CONTROL_CONT);
break;
default:
if (addr < ARRAY_SIZE(t->regs)) {
r = t->regs[addr];
}
break;
}
return r;
}
static void timer_write(void *opaque, hwaddr addr,
uint64_t value, unsigned int size)
{
AlteraTimer *t = opaque;
uint64_t tvalue;
uint32_t count = 0;
int irqState = timer_irq_state(t);
addr >>= 2;
switch (addr) {
case R_STATUS:
/* The timeout bit is cleared by writing the status register. */
t->regs[R_STATUS] &= ~STATUS_TO;
break;
case R_CONTROL:
t->regs[R_CONTROL] = value & (CONTROL_ITO | CONTROL_CONT);
if ((value & CONTROL_START) &&
!(t->regs[R_STATUS] & STATUS_RUN)) {
ptimer_run(t->ptimer, 1);
t->regs[R_STATUS] |= STATUS_RUN;
}
if ((value & CONTROL_STOP) && (t->regs[R_STATUS] & STATUS_RUN)) {
ptimer_stop(t->ptimer);
t->regs[R_STATUS] &= ~STATUS_RUN;
}
break;
case R_PERIODL:
case R_PERIODH:
t->regs[addr] = value & 0xFFFF;
if (t->regs[R_STATUS] & STATUS_RUN) {
ptimer_stop(t->ptimer);
t->regs[R_STATUS] &= ~STATUS_RUN;
}
tvalue = (t->regs[R_PERIODH] << 16) | t->regs[R_PERIODL];
ptimer_set_limit(t->ptimer, tvalue + 1, 1);
break;
case R_SNAPL:
case R_SNAPH:
count = ptimer_get_count(t->ptimer);
t->regs[R_SNAPL] = count & 0xFFFF;
t->regs[R_SNAPH] = count >> 16;
break;
default:
break;
}
if (irqState != timer_irq_state(t)) {
qemu_set_irq(t->irq, timer_irq_state(t));
}
}
static const MemoryRegionOps timer_ops = {
.read = timer_read,
.write = timer_write,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 4
}
};
static void timer_hit(void *opaque)
{
AlteraTimer *t = opaque;
const uint64_t tvalue = (t->regs[R_PERIODH] << 16) | t->regs[R_PERIODL];
t->regs[R_STATUS] |= STATUS_TO;
ptimer_set_limit(t->ptimer, tvalue + 1, 1);
if (!(t->regs[R_CONTROL] & CONTROL_CONT)) {
t->regs[R_STATUS] &= ~STATUS_RUN;
ptimer_set_count(t->ptimer, tvalue);
} else {
ptimer_run(t->ptimer, 1);
}
qemu_set_irq(t->irq, timer_irq_state(t));
}
static void altera_timer_realize(DeviceState *dev, Error **errp)
{
AlteraTimer *t = ALTERA_TIMER(dev);
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
if (t->freq_hz == 0) {
error_setg(errp, "\"clock-frequency\" property must be provided.");
return;
}
t->bh = qemu_bh_new(timer_hit, t);
t->ptimer = ptimer_init(t->bh, PTIMER_POLICY_DEFAULT);
ptimer_set_freq(t->ptimer, t->freq_hz);
memory_region_init_io(&t->mmio, OBJECT(t), &timer_ops, t,
TYPE_ALTERA_TIMER, R_MAX * sizeof(uint32_t));
sysbus_init_mmio(sbd, &t->mmio);
}
static void altera_timer_init(Object *obj)
{
AlteraTimer *t = ALTERA_TIMER(obj);
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
sysbus_init_irq(sbd, &t->irq);
}
static void altera_timer_reset(DeviceState *dev)
{
AlteraTimer *t = ALTERA_TIMER(dev);
ptimer_stop(t->ptimer);
ptimer_set_limit(t->ptimer, 0xffffffff, 1);
memset(t->regs, 0, ARRAY_SIZE(t->regs));
}
static Property altera_timer_properties[] = {
DEFINE_PROP_UINT32("clock-frequency", AlteraTimer, freq_hz, 0),
DEFINE_PROP_END_OF_LIST(),
};
static void altera_timer_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = altera_timer_realize;
dc->props = altera_timer_properties;
dc->reset = altera_timer_reset;
}
static const TypeInfo altera_timer_info = {
.name = TYPE_ALTERA_TIMER,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(AlteraTimer),
.instance_init = altera_timer_init,
.class_init = altera_timer_class_init,
};
static void altera_timer_register(void)
{
type_register_static(&altera_timer_info);
}
type_init(altera_timer_register)

6
include/disas/bfd.h
View File

@ -222,6 +222,10 @@ enum bfd_architecture
bfd_arch_ia64, /* HP/Intel ia64 */
#define bfd_mach_ia64_elf64 64
#define bfd_mach_ia64_elf32 32
bfd_arch_nios2, /* Nios II */
#define bfd_mach_nios2 0
#define bfd_mach_nios2r1 1
#define bfd_mach_nios2r2 2
bfd_arch_lm32, /* Lattice Mico32 */
#define bfd_mach_lm32 1
bfd_arch_last
@ -415,6 +419,8 @@ int print_insn_crisv10 (bfd_vma, disassemble_info*);
int print_insn_microblaze (bfd_vma, disassemble_info*);
int print_insn_ia64 (bfd_vma, disassemble_info*);
int print_insn_lm32 (bfd_vma, disassemble_info*);
int print_insn_big_nios2 (bfd_vma, disassemble_info*);
int print_insn_little_nios2 (bfd_vma, disassemble_info*);
#if 0
/* Fetch the disassembler for a given BFD, if that support is available. */

2
include/elf.h
View File

@ -126,6 +126,8 @@ typedef int64_t Elf64_Sxword;
*/
#define EM_S390_OLD 0xA390
#define EM_ALTERA_NIOS2 113 /* Altera Nios II soft-core processor */
#define EM_MICROBLAZE 189
#define EM_MICROBLAZE_OLD 0xBAAB

1
include/sysemu/arch_init.h
View File

@ -23,6 +23,7 @@ enum {
QEMU_ARCH_UNICORE32 = (1 << 14),
QEMU_ARCH_MOXIE = (1 << 15),
QEMU_ARCH_TRICORE = (1 << 16),
QEMU_ARCH_NIOS2 = (1 << 17),
};
extern const uint32_t arch_type;

57
linux-user/elfload.c
View File

@ -967,6 +967,63 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMBState *env
#endif /* TARGET_MICROBLAZE */
#ifdef TARGET_NIOS2
#define ELF_START_MMAP 0x80000000
#define elf_check_arch(x) ((x) == EM_ALTERA_NIOS2)
#define ELF_CLASS ELFCLASS32
#define ELF_ARCH EM_ALTERA_NIOS2
static void init_thread(struct target_pt_regs *regs, struct image_info *infop)
{
regs->ea = infop->entry;
regs->sp = infop->start_stack;
regs->estatus = 0x3;
}
#define ELF_EXEC_PAGESIZE 4096
#define USE_ELF_CORE_DUMP
#define ELF_NREG 49
typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
static void elf_core_copy_regs(target_elf_gregset_t *regs,
const CPUNios2State *env)
{
int i;
(*regs)[0] = -1;
for (i = 1; i < 8; i++) /* r0-r7 */
(*regs)[i] = tswapreg(env->regs[i + 7]);
for (i = 8; i < 16; i++) /* r8-r15 */
(*regs)[i] = tswapreg(env->regs[i - 8]);
for (i = 16; i < 24; i++) /* r16-r23 */
(*regs)[i] = tswapreg(env->regs[i + 7]);
(*regs)[24] = -1; /* R_ET */
(*regs)[25] = -1; /* R_BT */
(*regs)[26] = tswapreg(env->regs[R_GP]);
(*regs)[27] = tswapreg(env->regs[R_SP]);
(*regs)[28] = tswapreg(env->regs[R_FP]);
(*regs)[29] = tswapreg(env->regs[R_EA]);
(*regs)[30] = -1; /* R_SSTATUS */
(*regs)[31] = tswapreg(env->regs[R_RA]);
(*regs)[32] = tswapreg(env->regs[R_PC]);
(*regs)[33] = -1; /* R_STATUS */
(*regs)[34] = tswapreg(env->regs[CR_ESTATUS]);
for (i = 35; i < 49; i++) /* ... */
(*regs)[i] = -1;
}
#endif /* TARGET_NIOS2 */
#ifdef TARGET_OPENRISC
#define ELF_START_MMAP 0x08000000

140
linux-user/main.c
View File

@ -68,8 +68,11 @@ do { \
* This way we will never overlap with our own libraries or binaries or stack
* or anything else that QEMU maps.
*/
# ifdef TARGET_MIPS
/* MIPS only supports 31 bits of virtual address space for user space */
# if defined(TARGET_MIPS) || defined(TARGET_NIOS2)
/*
* MIPS only supports 31 bits of virtual address space for user space.
* Nios2 also only supports 31 bits.
*/
unsigned long reserved_va = 0x77000000;
# else
unsigned long reserved_va = 0xf7000000;
@ -2462,6 +2465,109 @@ error:
}
#endif
#ifdef TARGET_NIOS2
void cpu_loop(CPUNios2State *env)
{
CPUState *cs = ENV_GET_CPU(env);
Nios2CPU *cpu = NIOS2_CPU(cs);
target_siginfo_t info;
int trapnr, gdbsig, ret;
for (;;) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
gdbsig = 0;
switch (trapnr) {
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
case EXCP_TRAP:
if (env->regs[R_AT] == 0) {
abi_long ret;
qemu_log_mask(CPU_LOG_INT, "\nSyscall\n");
ret = do_syscall(env, env->regs[2],
env->regs[4], env->regs[5], env->regs[6],
env->regs[7], env->regs[8], env->regs[9],
0, 0);
if (env->regs[2] == 0) { /* FIXME: syscall 0 workaround */
ret = 0;
}
env->regs[2] = abs(ret);
/* Return value is 0..4096 */
env->regs[7] = (ret > 0xfffffffffffff000ULL);
env->regs[CR_ESTATUS] = env->regs[CR_STATUS];
env->regs[CR_STATUS] &= ~0x3;
env->regs[R_EA] = env->regs[R_PC] + 4;
env->regs[R_PC] += 4;
break;
} else {
qemu_log_mask(CPU_LOG_INT, "\nTrap\n");
env->regs[CR_ESTATUS] = env->regs[CR_STATUS];
env->regs[CR_STATUS] &= ~0x3;
env->regs[R_EA] = env->regs[R_PC] + 4;
env->regs[R_PC] = cpu->exception_addr;
gdbsig = TARGET_SIGTRAP;
break;
}
case 0xaa:
switch (env->regs[R_PC]) {
/*case 0x1000:*/ /* TODO:__kuser_helper_version */
case 0x1004: /* __kuser_cmpxchg */
start_exclusive();
if (env->regs[4] & 0x3) {
goto kuser_fail;
}
ret = get_user_u32(env->regs[2], env->regs[4]);
if (ret) {
end_exclusive();
goto kuser_fail;
}
env->regs[2] -= env->regs[5];
if (env->regs[2] == 0) {
put_user_u32(env->regs[6], env->regs[4]);
}
end_exclusive();
env->regs[R_PC] = env->regs[R_RA];
break;
/*case 0x1040:*/ /* TODO:__kuser_sigtramp */
default:
;
kuser_fail:
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
/* TODO: check env->error_code */
info.si_code = TARGET_SEGV_MAPERR;
info._sifields._sigfault._addr = env->regs[R_PC];
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
break;
default:
EXCP_DUMP(env, "\nqemu: unhandled CPU exception %#x - aborting\n",
trapnr);
gdbsig = TARGET_SIGILL;
break;
}
if (gdbsig) {
gdb_handlesig(cs, gdbsig);
if (gdbsig != TARGET_SIGTRAP) {
exit(EXIT_FAILURE);
}
}
process_pending_signals(env);
}
}
#endif /* TARGET_NIOS2 */
#ifdef TARGET_OPENRISC
void cpu_loop(CPUOpenRISCState *env)
@ -4632,6 +4738,36 @@ int main(int argc, char **argv, char **envp)
restore_snan_bit_mode(env);
}
}
#elif defined(TARGET_NIOS2)
{
env->regs[0] = 0;
env->regs[1] = regs->r1;
env->regs[2] = regs->r2;
env->regs[3] = regs->r3;
env->regs[4] = regs->r4;
env->regs[5] = regs->r5;
env->regs[6] = regs->r6;
env->regs[7] = regs->r7;
env->regs[8] = regs->r8;
env->regs[9] = regs->r9;
env->regs[10] = regs->r10;
env->regs[11] = regs->r11;
env->regs[12] = regs->r12;
env->regs[13] = regs->r13;
env->regs[14] = regs->r14;
env->regs[15] = regs->r15;
/* TODO: unsigned long orig_r2; */
env->regs[R_RA] = regs->ra;
env->regs[R_FP] = regs->fp;
env->regs[R_SP] = regs->sp;
env->regs[R_GP] = regs->gp;
env->regs[CR_ESTATUS] = regs->estatus;
env->regs[R_EA] = regs->ea;
/* TODO: unsigned long orig_r7; */
/* Emulate eret when starting thread. */
env->regs[R_PC] = regs->ea;
}
#elif defined(TARGET_OPENRISC)
{
int i;

329
linux-user/nios2/syscall_nr.h Normal file
View File

@ -0,0 +1,329 @@
#define TARGET_NR_io_setup 0
#define TARGET_NR_io_destroy 1
#define TARGET_NR_io_submit 2
#define TARGET_NR_io_cancel 3
#define TARGET_NR_io_getevents 4
#define TARGET_NR_setxattr 5
#define TARGET_NR_lsetxattr 6
#define TARGET_NR_fsetxattr 7
#define TARGET_NR_getxattr 8
#define TARGET_NR_lgetxattr 9
#define TARGET_NR_fgetxattr 10
#define TARGET_NR_listxattr 11
#define TARGET_NR_llistxattr 12
#define TARGET_NR_flistxattr 13
#define TARGET_NR_removexattr 14
#define TARGET_NR_lremovexattr 15
#define TARGET_NR_fremovexattr 16
#define TARGET_NR_getcwd 17
#define TARGET_NR_lookup_dcookie 18
#define TARGET_NR_eventfd2 19
#define TARGET_NR_epoll_create1 20
#define TARGET_NR_epoll_ctl 21
#define TARGET_NR_epoll_pwait 22
#define TARGET_NR_dup 23
#define TARGET_NR_dup3 24
#define TARGET_NR_fcntl64 25
#define TARGET_NR_inotify_init1 26
#define TARGET_NR_inotify_add_watch 27
#define TARGET_NR_inotify_rm_watch 28
#define TARGET_NR_ioctl 29
#define TARGET_NR_ioprio_set 30
#define TARGET_NR_ioprio_get 31
#define TARGET_NR_flock 32
#define TARGET_NR_mknodat 33
#define TARGET_NR_mkdirat 34
#define TARGET_NR_unlinkat 35
#define TARGET_NR_symlinkat 36
#define TARGET_NR_linkat 37
#define TARGET_NR_renameat 38
#define TARGET_NR_umount2 39
#define TARGET_NR_mount 40
#define TARGET_NR_pivot_root 41
#define TARGET_NR_nfsservctl 42
#define TARGET_NR_statfs64 43
#define TARGET_NR_fstatfs64 44
#define TARGET_NR_truncate64 45
#define TARGET_NR_ftruncate64 46
#define TARGET_NR_fallocate 47
#define TARGET_NR_faccessat 48
#define TARGET_NR_chdir 49
#define TARGET_NR_fchdir 50
#define TARGET_NR_chroot 51
#define TARGET_NR_fchmod 52
#define TARGET_NR_fchmodat 53
#define TARGET_NR_fchownat 54
#define TARGET_NR_fchown 55
#define TARGET_NR_openat 56
#define TARGET_NR_close 57
#define TARGET_NR_vhangup 58
#define TARGET_NR_pipe2 59
#define TARGET_NR_quotactl 60
#define TARGET_NR_getdents64 61
#define TARGET_NR_read 63
#define TARGET_NR_write 64
#define TARGET_NR_readv 65
#define TARGET_NR_writev 66
#define TARGET_NR_pread64 67
#define TARGET_NR_pwrite64 68
#define TARGET_NR_preadv 69
#define TARGET_NR_pwritev 70
#define TARGET_NR_sendfile64 71
#define TARGET_NR_pselect6 72
#define TARGET_NR_ppoll 73
#define TARGET_NR_signalfd4 74
#define TARGET_NR_vmsplice 75
#define TARGET_NR_splice 76
#define TARGET_NR_tee 77
#define TARGET_NR_readlinkat 78
#define TARGET_NR_fstatat64 79
#define TARGET_NR_fstat64 80
#define TARGET_NR_sync 81
#define TARGET_NR_fsync 82
#define TARGET_NR_fdatasync 83
#define TARGET_NR_sync_file_range 84
#define TARGET_NR_timerfd_create 85
#define TARGET_NR_timerfd_settime 86
#define TARGET_NR_timerfd_gettime 87
#define TARGET_NR_utimensat 88
#define TARGET_NR_acct 89
#define TARGET_NR_capget 90
#define TARGET_NR_capset 91
#define TARGET_NR_personality 92
#define TARGET_NR_exit 93
#define TARGET_NR_exit_group 94
#define TARGET_NR_waitid 95
#define TARGET_NR_set_tid_address 96
#define TARGET_NR_unshare 97
#define TARGET_NR_futex 98
#define TARGET_NR_set_robust_list 99
#define TARGET_NR_get_robust_list 100
#define TARGET_NR_nanosleep 101
#define TARGET_NR_getitimer 102
#define TARGET_NR_setitimer 103
#define TARGET_NR_kexec_load 104
#define TARGET_NR_init_module 105
#define TARGET_NR_delete_module 106
#define TARGET_NR_timer_create 107
#define TARGET_NR_timer_gettime 108
#define TARGET_NR_timer_getoverrun 109
#define TARGET_NR_timer_settime 110
#define TARGET_NR_timer_delete 111
#define TARGET_NR_clock_settime 112
#define TARGET_NR_clock_gettime 113
#define TARGET_NR_clock_getres 114
#define TARGET_NR_clock_nanosleep 115
#define TARGET_NR_syslog 116
#define TARGET_NR_ptrace 117
#define TARGET_NR_sched_setparam 118
#define TARGET_NR_sched_setscheduler 119
#define TARGET_NR_sched_getscheduler 120
#define TARGET_NR_sched_getparam 121
#define TARGET_NR_sched_setaffinity 122
#define TARGET_NR_sched_getaffinity 123
#define TARGET_NR_sched_yield 124
#define TARGET_NR_sched_get_priority_max 125
#define TARGET_NR_sched_get_priority_min 126
#define TARGET_NR_sched_rr_get_interval 127
#define TARGET_NR_restart_syscall 128
#define TARGET_NR_kill 129
#define TARGET_NR_tkill 130
#define TARGET_NR_tgkill 131
#define TARGET_NR_sigaltstack 132
#define TARGET_NR_rt_sigsuspend 133
#define TARGET_NR_rt_sigaction 134
#define TARGET_NR_rt_sigprocmask 135
#define TARGET_NR_rt_sigpending 136
#define TARGET_NR_rt_sigtimedwait 137
#define TARGET_NR_rt_sigqueueinfo 138
#define TARGET_NR_rt_sigreturn 139
#define TARGET_NR_setpriority 140
#define TARGET_NR_getpriority 141
#define TARGET_NR_reboot 142
#define TARGET_NR_setregid 143
#define TARGET_NR_setgid 144
#define TARGET_NR_setreuid 145
#define TARGET_NR_setuid 146
#define TARGET_NR_setresuid 147
#define TARGET_NR_getresuid 148
#define TARGET_NR_setresgid 149
#define TARGET_NR_getresgid 150
#define TARGET_NR_setfsuid 151
#define TARGET_NR_setfsgid 152
#define TARGET_NR_times 153
#define TARGET_NR_setpgid 154
#define TARGET_NR_getpgid 155
#define TARGET_NR_getsid 156
#define TARGET_NR_setsid 157
#define TARGET_NR_getgroups 158
#define TARGET_NR_setgroups 159
#define TARGET_NR_uname 160
#define TARGET_NR_sethostname 161
#define TARGET_NR_setdomainname 162
#define TARGET_NR_getrlimit 163
#define TARGET_NR_setrlimit 164
#define TARGET_NR_getrusage 165
#define TARGET_NR_umask 166
#define TARGET_NR_prctl 167
#define TARGET_NR_getcpu 168
#define TARGET_NR_gettimeofday 169
#define TARGET_NR_settimeofday 170
#define TARGET_NR_adjtimex 171
#define TARGET_NR_getpid 172
#define TARGET_NR_getppid 173
#define TARGET_NR_getuid 174
#define TARGET_NR_geteuid 175
#define TARGET_NR_getgid 176
#define TARGET_NR_getegid 177
#define TARGET_NR_gettid 178
#define TARGET_NR_sysinfo 179
#define TARGET_NR_mq_open 180
#define TARGET_NR_mq_unlink 181
#define TARGET_NR_mq_timedsend 182
#define TARGET_NR_mq_timedreceive 183
#define TARGET_NR_mq_notify 184
#define TARGET_NR_mq_getsetattr 185
#define TARGET_NR_msgget 186
#define TARGET_NR_msgctl 187
#define TARGET_NR_msgrcv 188
#define TARGET_NR_msgsnd 189
#define TARGET_NR_semget 190
#define TARGET_NR_semctl 191
#define TARGET_NR_semtimedop 192
#define TARGET_NR_semop 193
#define TARGET_NR_shmget 194
#define TARGET_NR_shmctl 195
#define TARGET_NR_shmat 196
#define TARGET_NR_shmdt 197
#define TARGET_NR_socket 198
#define TARGET_NR_socketpair 199
#define TARGET_NR_bind 200
#define TARGET_NR_listen 201
#define TARGET_NR_accept 202
#define TARGET_NR_connect 203
#define TARGET_NR_getsockname 204
#define TARGET_NR_getpeername 205
#define TARGET_NR_sendto 206
#define TARGET_NR_recvfrom 207
#define TARGET_NR_setsockopt 208
#define TARGET_NR_getsockopt 209
#define TARGET_NR_shutdown 210
#define TARGET_NR_sendmsg 211
#define TARGET_NR_recvmsg 212
#define TARGET_NR_readahead 213
#define TARGET_NR_brk 214
#define TARGET_NR_munmap 215
#define TARGET_NR_mremap 216
#define TARGET_NR_add_key 217
#define TARGET_NR_request_key 218
#define TARGET_NR_keyctl 219
#define TARGET_NR_clone 220
#define TARGET_NR_execve 221
#define TARGET_NR_mmap2 222
#define TARGET_NR_fadvise64_64 223
#define TARGET_NR_swapon 224
#define TARGET_NR_swapoff 225
#define TARGET_NR_mprotect 226
#define TARGET_NR_msync 227
#define TARGET_NR_mlock 228
#define TARGET_NR_munlock 229
#define TARGET_NR_mlockall 230
#define TARGET_NR_munlockall 231
#define TARGET_NR_mincore 232
#define TARGET_NR_madvise 233
#define TARGET_NR_remap_file_pages 234
#define TARGET_NR_mbind 235
#define TARGET_NR_get_mempolicy 236
#define TARGET_NR_set_mempolicy 237
#define TARGET_NR_migrate_pages 238
#define TARGET_NR_move_pages 239
#define TARGET_NR_rt_tgsigqueueinfo 240
#define TARGET_NR_perf_event_open 241
#define TARGET_NR_accept4 242
#define TARGET_NR_recvmmsg 243
#define TARGET_NR_cacheflush 244
#define TARGET_NR_arch_specific_syscall 244
#define TARGET_NR_wait4 260
#define TARGET_NR_prlimit64 261
#define TARGET_NR_fanotify_init 262
#define TARGET_NR_fanotify_mark 263
#define TARGET_NR_name_to_handle_at 264
#define TARGET_NR_open_by_handle_at 265
#define TARGET_NR_clock_adjtime 266
#define TARGET_NR_syncfs 267
#define TARGET_NR_setns 268
#define TARGET_NR_sendmmsg 269
#define TARGET_NR_process_vm_readv 270
#define TARGET_NR_process_vm_writev 271
#define TARGET_NR_kcmp 272
#define TARGET_NR_finit_module 273
#define TARGET_NR_sched_setattr 274
#define TARGET_NR_sched_getattr 275
#define TARGET_NR_renameat2 276
#define TARGET_NR_seccomp 277
#define TARGET_NR_getrandom 278
#define TARGET_NR_memfd_create 279
#define TARGET_NR_bpf 280
#define TARGET_NR_execveat 281
#define TARGET_NR_userfaultfd 282
#define TARGET_NR_membarrier 283
#define TARGET_NR_mlock2 284
#define TARGET_NR_copy_file_range 285
#define TARGET_NR_preadv2 286
#define TARGET_NR_pwritev2 287
#define TARGET_NR_open 1024
#define TARGET_NR_link 1025
#define TARGET_NR_unlink 1026
#define TARGET_NR_mknod 1027
#define TARGET_NR_chmod 1028
#define TARGET_NR_chown 1029
#define TARGET_NR_mkdir 1030
#define TARGET_NR_rmdir 1031
#define TARGET_NR_lchown 1032
#define TARGET_NR_access 1033
#define TARGET_NR_rename 1034
#define TARGET_NR_readlink 1035
#define TARGET_NR_symlink 1036
#define TARGET_NR_utimes 1037
#define TARGET_NR_3264_stat 1038
#define TARGET_NR_3264_lstat 1039
#define TARGET_NR_pipe 1040
#define TARGET_NR_dup2 1041
#define TARGET_NR_epoll_create 1042
#define TARGET_NR_inotify_init 1043
#define TARGET_NR_eventfd 1044
#define TARGET_NR_signalfd 1045
#define TARGET_NR_sendfile 1046
#define TARGET_NR_ftruncate 1047
#define TARGET_NR_truncate 1048
#define TARGET_NR_stat 1049
#define TARGET_NR_lstat 1050
#define TARGET_NR_fstat 1051
#define TARGET_NR_fcntl 1052
#define TARGET_NR_fadvise64 1053
#define TARGET_NR_newfstatat 1054
#define TARGET_NR_fstatfs 1055
#define TARGET_NR_statfs 1056
#define TARGET_NR_lseek 1057
#define TARGET_NR_mmap 1058
#define TARGET_NR_alarm 1059
#define TARGET_NR_getpgrp 1060
#define TARGET_NR_pause 1061
#define TARGET_NR_time 1062
#define TARGET_NR_utime 1063
#define TARGET_NR_creat 1064
#define TARGET_NR_getdents 1065
#define TARGET_NR_futimesat 1066
#define TARGET_NR_select 1067
#define TARGET_NR_poll 1068
#define TARGET_NR_epoll_wait 1069
#define TARGET_NR_ustat 1070
#define TARGET_NR_vfork 1071
#define TARGET_NR_oldwait4 1072
#define TARGET_NR_recv 1073
#define TARGET_NR_send 1074
#define TARGET_NR_bdflush 1075
#define TARGET_NR_umount 1076
#define TARGET_NR_uselib 1077
#define TARGET_NR__sysctl 1078
#define TARGET_NR_fork 1079

39
linux-user/nios2/target_cpu.h Normal file
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@ -0,0 +1,39 @@
/*
* Nios2 specific CPU ABI and functions for linux-user
*
* Copyright (c) 2016 Marek Vasut <marex@denx.de>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef TARGET_CPU_H
#define TARGET_CPU_H
static inline void cpu_clone_regs(CPUNios2State *env, target_ulong newsp)
{
if (newsp) {
env->regs[R_SP] = newsp;
}
env->regs[R_RET0] = 0;
}
static inline void cpu_set_tls(CPUNios2State *env, target_ulong newtls)
{
/*
* Linux kernel 3.10 does not pay any attention to CLONE_SETTLS
* in copy_thread(), so QEMU need not do so either.
*/
}
#endif

26
linux-user/nios2/target_signal.h Normal file
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@ -0,0 +1,26 @@
#ifndef TARGET_SIGNAL_H
#define TARGET_SIGNAL_H
#include "cpu.h"
/* this struct defines a stack used during syscall handling */
typedef struct target_sigaltstack {
abi_long ss_sp;
abi_ulong ss_size;
abi_long ss_flags;
} target_stack_t;
/* sigaltstack controls */
#define TARGET_SS_ONSTACK 1
#define TARGET_SS_DISABLE 2
#define TARGET_MINSIGSTKSZ 2048
#define TARGET_SIGSTKSZ 8192
static inline abi_ulong get_sp_from_cpustate(CPUNios2State *state)
{
return state->regs[R_SP];
}
#endif /* TARGET_SIGNAL_H */

58
linux-user/nios2/target_structs.h Normal file
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@ -0,0 +1,58 @@
/*
* Nios2 specific structures for linux-user
*
* Copyright (c) 2016 Marek Vasut <marex@denx.de>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef TARGET_STRUCTS_H
#define TARGET_STRUCTS_H
struct target_ipc_perm {
abi_int __key; /* Key. */
abi_uint uid; /* Owner's user ID. */
abi_uint gid; /* Owner's group ID. */
abi_uint cuid; /* Creator's user ID. */
abi_uint cgid; /* Creator's group ID. */
abi_ushort mode; /* Read/write permission. */
abi_ushort __pad1;
abi_ushort __seq; /* Sequence number. */
abi_ushort __pad2;
abi_ulong __unused1;
abi_ulong __unused2;
};
struct target_shmid_ds {
struct target_ipc_perm shm_perm; /* operation permission struct */
abi_long shm_segsz; /* size of segment in bytes */
abi_ulong shm_atime; /* time of last shmat() */
#if TARGET_ABI_BITS == 32
abi_ulong __unused1;
#endif
abi_ulong shm_dtime; /* time of last shmdt() */
#if TARGET_ABI_BITS == 32
abi_ulong __unused2;
#endif
abi_ulong shm_ctime; /* time of last change by shmctl() */
#if TARGET_ABI_BITS == 32
abi_ulong __unused3;
#endif
abi_int shm_cpid; /* pid of creator */
abi_int shm_lpid; /* pid of last shmop */
abi_ulong shm_nattch; /* number of current attaches */
abi_ulong __unused4;
abi_ulong __unused5;
};
#endif

37
linux-user/nios2/target_syscall.h Normal file
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@ -0,0 +1,37 @@
#ifndef TARGET_SYSCALL_H
#define TARGET_SYSCALL_H
#define UNAME_MACHINE "nios2"
#define UNAME_MINIMUM_RELEASE "3.19.0"
struct target_pt_regs {
unsigned long r8; /* r8-r15 Caller-saved GP registers */
unsigned long r9;
unsigned long r10;
unsigned long r11;
unsigned long r12;
unsigned long r13;
unsigned long r14;
unsigned long r15;
unsigned long r1; /* Assembler temporary */
unsigned long r2; /* Retval LS 32bits */
unsigned long r3; /* Retval MS 32bits */
unsigned long r4; /* r4-r7 Register arguments */
unsigned long r5;
unsigned long r6;
unsigned long r7;
unsigned long orig_r2; /* Copy of r2 ?? */
unsigned long ra; /* Return address */
unsigned long fp; /* Frame pointer */
unsigned long sp; /* Stack pointer */
unsigned long gp; /* Global pointer */
unsigned long estatus;
unsigned long ea; /* Exception return address (pc) */
unsigned long orig_r7;
};
#define TARGET_MINSIGSTKSZ 2048
#define TARGET_MLOCKALL_MCL_CURRENT 1
#define TARGET_MLOCKALL_MCL_FUTURE 2
#endif /* TARGET_SYSCALL_H */

220
linux-user/nios2/termbits.h Normal file
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@ -0,0 +1,220 @@
/* from asm/termbits.h */
/* NOTE: exactly the same as i386 */
#define TARGET_NCCS 19
struct target_termios {
unsigned int c_iflag; /* input mode flags */
unsigned int c_oflag; /* output mode flags */
unsigned int c_cflag; /* control mode flags */
unsigned int c_lflag; /* local mode flags */
unsigned char c_line; /* line discipline */
unsigned char c_cc[TARGET_NCCS]; /* control characters */
};
/* c_iflag bits */
#define TARGET_IGNBRK 0000001
#define TARGET_BRKINT 0000002
#define TARGET_IGNPAR 0000004
#define TARGET_PARMRK 0000010
#define TARGET_INPCK 0000020
#define TARGET_ISTRIP 0000040
#define TARGET_INLCR 0000100
#define TARGET_IGNCR 0000200
#define TARGET_ICRNL 0000400
#define TARGET_IUCLC 0001000
#define TARGET_IXON 0002000
#define TARGET_IXANY 0004000
#define TARGET_IXOFF 0010000
#define TARGET_IMAXBEL 0020000
#define TARGET_IUTF8 0040000
/* c_oflag bits */
#define TARGET_OPOST 0000001
#define TARGET_OLCUC 0000002
#define TARGET_ONLCR 0000004
#define TARGET_OCRNL 0000010
#define TARGET_ONOCR 0000020
#define TARGET_ONLRET 0000040
#define TARGET_OFILL 0000100
#define TARGET_OFDEL 0000200
#define TARGET_NLDLY 0000400
#define TARGET_NL0 0000000
#define TARGET_NL1 0000400
#define TARGET_CRDLY 0003000
#define TARGET_CR0 0000000
#define TARGET_CR1 0001000
#define TARGET_CR2 0002000
#define TARGET_CR3 0003000
#define TARGET_TABDLY 0014000
#define TARGET_TAB0 0000000
#define TARGET_TAB1 0004000
#define TARGET_TAB2 0010000
#define TARGET_TAB3 0014000
#define TARGET_XTABS 0014000
#define TARGET_BSDLY 0020000
#define TARGET_BS0 0000000
#define TARGET_BS1 0020000
#define TARGET_VTDLY 0040000
#define TARGET_VT0 0000000
#define TARGET_VT1 0040000
#define TARGET_FFDLY 0100000
#define TARGET_FF0 0000000
#define TARGET_FF1 0100000
/* c_cflag bit meaning */
#define TARGET_CBAUD 0010017
#define TARGET_B0 0000000 /* hang up */
#define TARGET_B50 0000001
#define TARGET_B75 0000002
#define TARGET_B110 0000003
#define TARGET_B134 0000004
#define TARGET_B150 0000005
#define TARGET_B200 0000006
#define TARGET_B300 0000007
#define TARGET_B600 0000010
#define TARGET_B1200 0000011
#define TARGET_B1800 0000012
#define TARGET_B2400 0000013
#define TARGET_B4800 0000014
#define TARGET_B9600 0000015
#define TARGET_B19200 0000016
#define TARGET_B38400 0000017
#define TARGET_EXTA B19200
#define TARGET_EXTB B38400
#define TARGET_CSIZE 0000060
#define TARGET_CS5 0000000
#define TARGET_CS6 0000020
#define TARGET_CS7 0000040
#define TARGET_CS8 0000060
#define TARGET_CSTOPB 0000100
#define TARGET_CREAD 0000200
#define TARGET_PARENB 0000400
#define TARGET_PARODD 0001000
#define TARGET_HUPCL 0002000
#define TARGET_CLOCAL 0004000
#define TARGET_CBAUDEX 0010000
#define TARGET_B57600 0010001
#define TARGET_B115200 0010002
#define TARGET_B230400 0010003
#define TARGET_B460800 0010004
#define TARGET_CIBAUD 002003600000 /* input baud rate (not used) */
#define TARGET_CMSPAR 010000000000 /* mark or space (stick) parity */
#define TARGET_CRTSCTS 020000000000 /* flow control */
/* c_lflag bits */
#define TARGET_ISIG 0000001
#define TARGET_ICANON 0000002
#define TARGET_XCASE 0000004
#define TARGET_ECHO 0000010
#define TARGET_ECHOE 0000020
#define TARGET_ECHOK 0000040
#define TARGET_ECHONL 0000100
#define TARGET_NOFLSH 0000200
#define TARGET_TOSTOP 0000400
#define TARGET_ECHOCTL 0001000
#define TARGET_ECHOPRT 0002000
#define TARGET_ECHOKE 0004000
#define TARGET_FLUSHO 0010000
#define TARGET_PENDIN 0040000
#define TARGET_IEXTEN 0100000
/* c_cc character offsets */
#define TARGET_VINTR 0
#define TARGET_VQUIT 1
#define TARGET_VERASE 2
#define TARGET_VKILL 3
#define TARGET_VEOF 4
#define TARGET_VTIME 5
#define TARGET_VMIN 6
#define TARGET_VSWTC 7
#define TARGET_VSTART 8
#define TARGET_VSTOP 9
#define TARGET_VSUSP 10
#define TARGET_VEOL 11
#define TARGET_VREPRINT 12
#define TARGET_VDISCARD 13
#define TARGET_VWERASE 14
#define TARGET_VLNEXT 15
#define TARGET_VEOL2 16
/* ioctls */
#define TARGET_TCGETS 0x5401
#define TARGET_TCSETS 0x5402
#define TARGET_TCSETSW 0x5403
#define TARGET_TCSETSF 0x5404
#define TARGET_TCGETA 0x5405
#define TARGET_TCSETA 0x5406
#define TARGET_TCSETAW 0x5407
#define TARGET_TCSETAF 0x5408
#define TARGET_TCSBRK 0x5409
#define TARGET_TCXONC 0x540A
#define TARGET_TCFLSH 0x540B
#define TARGET_TIOCEXCL 0x540C
#define TARGET_TIOCNXCL 0x540D
#define TARGET_TIOCSCTTY 0x540E
#define TARGET_TIOCGPGRP 0x540F
#define TARGET_TIOCSPGRP 0x5410
#define TARGET_TIOCOUTQ 0x5411
#define TARGET_TIOCSTI 0x5412
#define TARGET_TIOCGWINSZ 0x5413
#define TARGET_TIOCSWINSZ 0x5414
#define TARGET_TIOCMGET 0x5415
#define TARGET_TIOCMBIS 0x5416
#define TARGET_TIOCMBIC 0x5417
#define TARGET_TIOCMSET 0x5418
#define TARGET_TIOCGSOFTCAR 0x5419
#define TARGET_TIOCSSOFTCAR 0x541A
#define TARGET_FIONREAD 0x541B
#define TARGET_TIOCINQ TARGET_FIONREAD
#define TARGET_TIOCLINUX 0x541C
#define TARGET_TIOCCONS 0x541D
#define TARGET_TIOCGSERIAL 0x541E
#define TARGET_TIOCSSERIAL 0x541F
#define TARGET_TIOCPKT 0x5420
#define TARGET_FIONBIO 0x5421
#define TARGET_TIOCNOTTY 0x5422
#define TARGET_TIOCSETD 0x5423
#define TARGET_TIOCGETD 0x5424
#define TARGET_TCSBRKP 0x5425 /* Needed for POSIX tcsendbreak() */
#define TARGET_TIOCTTYGSTRUCT 0x5426 /* For debugging only */
#define TARGET_TIOCSBRK 0x5427 /* BSD compatibility */
#define TARGET_TIOCCBRK 0x5428 /* BSD compatibility */
#define TARGET_TIOCGSID 0x5429 /* Return the session ID of FD */
#define TARGET_TIOCGPTN TARGET_IOR('T', 0x30, unsigned int)
/* Get Pty Number (of pty-mux device) */
#define TARGET_TIOCSPTLCK TARGET_IOW('T', 0x31, int)
/* Lock/unlock Pty */
#define TARGET_FIONCLEX 0x5450 /* these numbers need to be adjusted. */
#define TARGET_FIOCLEX 0x5451
#define TARGET_FIOASYNC 0x5452
#define TARGET_TIOCSERCONFIG 0x5453
#define TARGET_TIOCSERGWILD 0x5454
#define TARGET_TIOCSERSWILD 0x5455
#define TARGET_TIOCGLCKTRMIOS 0x5456
#define TARGET_TIOCSLCKTRMIOS 0x5457
#define TARGET_TIOCSERGSTRUCT 0x5458 /* For debugging only */
#define TARGET_TIOCSERGETLSR 0x5459 /* Get line status register */
#define TARGET_TIOCSERGETMULTI 0x545A /* Get multiport config */
#define TARGET_TIOCSERSETMULTI 0x545B /* Set multiport config */
#define TARGET_TIOCMIWAIT 0x545C
/* wait for a change on serial input line(s) */
#define TARGET_TIOCGICOUNT 0x545D
/* read serial port inline interrupt counts */
#define TARGET_TIOCGHAYESESP 0x545E /* Get Hayes ESP configuration */
#define TARGET_TIOCSHAYESESP 0x545F /* Set Hayes ESP configuration */
/* Used for packet mode */
#define TARGET_TIOCPKT_DATA 0
#define TARGET_TIOCPKT_FLUSHREAD 1
#define TARGET_TIOCPKT_FLUSHWRITE 2
#define TARGET_TIOCPKT_STOP 4
#define TARGET_TIOCPKT_START 8
#define TARGET_TIOCPKT_NOSTOP 16
#define TARGET_TIOCPKT_DOSTOP 32
#define TARGET_TIOCSER_TEMT 0x01 /* Transmitter physically empty */

239
linux-user/signal.c
View File

@ -254,7 +254,7 @@ int do_sigprocmask(int how, const sigset_t *set, sigset_t *oldset)
}
#if !defined(TARGET_OPENRISC) && !defined(TARGET_UNICORE32) && \
!defined(TARGET_X86_64)
!defined(TARGET_X86_64) && !defined(TARGET_NIOS2)
/* Just set the guest's signal mask to the specified value; the
* caller is assumed to have called block_signals() already.
*/
@ -3922,6 +3922,240 @@ long do_rt_sigreturn(CPUCRISState *env)
return -TARGET_ENOSYS;
}
#elif defined(TARGET_NIOS2)
#define MCONTEXT_VERSION 2
struct target_sigcontext {
int version;
unsigned long gregs[32];
};
struct target_ucontext {
abi_ulong tuc_flags;
abi_ulong tuc_link;
target_stack_t tuc_stack;
struct target_sigcontext tuc_mcontext;
target_sigset_t tuc_sigmask; /* mask last for extensibility */
};
struct target_rt_sigframe {
struct target_siginfo info;
struct target_ucontext uc;
};
static unsigned long sigsp(unsigned long sp, struct target_sigaction *ka)
{
if (unlikely((ka->sa_flags & SA_ONSTACK)) && !sas_ss_flags(sp)) {
#ifdef CONFIG_STACK_GROWSUP
return target_sigaltstack_used.ss_sp;
#else
return target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
#endif
}
return sp;
}
static int rt_setup_ucontext(struct target_ucontext *uc, CPUNios2State *env)
{
unsigned long *gregs = uc->tuc_mcontext.gregs;
__put_user(MCONTEXT_VERSION, &uc->tuc_mcontext.version);
__put_user(env->regs[1], &gregs[0]);
__put_user(env->regs[2], &gregs[1]);
__put_user(env->regs[3], &gregs[2]);
__put_user(env->regs[4], &gregs[3]);
__put_user(env->regs[5], &gregs[4]);
__put_user(env->regs[6], &gregs[5]);
__put_user(env->regs[7], &gregs[6]);
__put_user(env->regs[8], &gregs[7]);
__put_user(env->regs[9], &gregs[8]);
__put_user(env->regs[10], &gregs[9]);
__put_user(env->regs[11], &gregs[10]);
__put_user(env->regs[12], &gregs[11]);
__put_user(env->regs[13], &gregs[12]);
__put_user(env->regs[14], &gregs[13]);
__put_user(env->regs[15], &gregs[14]);
__put_user(env->regs[16], &gregs[15]);
__put_user(env->regs[17], &gregs[16]);
__put_user(env->regs[18], &gregs[17]);
__put_user(env->regs[19], &gregs[18]);
__put_user(env->regs[20], &gregs[19]);
__put_user(env->regs[21], &gregs[20]);
__put_user(env->regs[22], &gregs[21]);
__put_user(env->regs[23], &gregs[22]);
__put_user(env->regs[R_RA], &gregs[23]);
__put_user(env->regs[R_FP], &gregs[24]);
__put_user(env->regs[R_GP], &gregs[25]);
__put_user(env->regs[R_EA], &gregs[27]);
__put_user(env->regs[R_SP], &gregs[28]);
return 0;
}
static int rt_restore_ucontext(CPUNios2State *env, struct target_ucontext *uc,
int *pr2)
{
int temp;
abi_ulong off, frame_addr = env->regs[R_SP];
unsigned long *gregs = uc->tuc_mcontext.gregs;
int err;
/* Always make any pending restarted system calls return -EINTR */
/* current->restart_block.fn = do_no_restart_syscall; */
__get_user(temp, &uc->tuc_mcontext.version);
if (temp != MCONTEXT_VERSION) {
return 1;
}
/* restore passed registers */
__get_user(env->regs[1], &gregs[0]);
__get_user(env->regs[2], &gregs[1]);
__get_user(env->regs[3], &gregs[2]);
__get_user(env->regs[4], &gregs[3]);
__get_user(env->regs[5], &gregs[4]);
__get_user(env->regs[6], &gregs[5]);
__get_user(env->regs[7], &gregs[6]);
__get_user(env->regs[8], &gregs[7]);
__get_user(env->regs[9], &gregs[8]);
__get_user(env->regs[10], &gregs[9]);
__get_user(env->regs[11], &gregs[10]);
__get_user(env->regs[12], &gregs[11]);
__get_user(env->regs[13], &gregs[12]);
__get_user(env->regs[14], &gregs[13]);
__get_user(env->regs[15], &gregs[14]);
__get_user(env->regs[16], &gregs[15]);
__get_user(env->regs[17], &gregs[16]);
__get_user(env->regs[18], &gregs[17]);
__get_user(env->regs[19], &gregs[18]);
__get_user(env->regs[20], &gregs[19]);
__get_user(env->regs[21], &gregs[20]);
__get_user(env->regs[22], &gregs[21]);
__get_user(env->regs[23], &gregs[22]);
/* gregs[23] is handled below */
/* Verify, should this be settable */
__get_user(env->regs[R_FP], &gregs[24]);
/* Verify, should this be settable */
__get_user(env->regs[R_GP], &gregs[25]);
/* Not really necessary no user settable bits */
__get_user(temp, &gregs[26]);
__get_user(env->regs[R_EA], &gregs[27]);
__get_user(env->regs[R_RA], &gregs[23]);
__get_user(env->regs[R_SP], &gregs[28]);
off = offsetof(struct target_rt_sigframe, uc.tuc_stack);
err = do_sigaltstack(frame_addr + off, 0, get_sp_from_cpustate(env));
if (err == -EFAULT) {
return 1;
}
*pr2 = env->regs[2];
return 0;
}
static void *get_sigframe(struct target_sigaction *ka, CPUNios2State *env,
size_t frame_size)
{
unsigned long usp;
/* Default to using normal stack. */
usp = env->regs[R_SP];
/* This is the X/Open sanctioned signal stack switching. */
usp = sigsp(usp, ka);
/* Verify, is it 32 or 64 bit aligned */
return (void *)((usp - frame_size) & -8UL);
}
static void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set,
CPUNios2State *env)
{
struct target_rt_sigframe *frame;
int i, err = 0;
frame = get_sigframe(ka, env, sizeof(*frame));
if (ka->sa_flags & SA_SIGINFO) {
tswap_siginfo(&frame->info, info);
}
/* Create the ucontext. */
__put_user(0, &frame->uc.tuc_flags);
__put_user(0, &frame->uc.tuc_link);
__put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp);
__put_user(sas_ss_flags(env->regs[R_SP]), &frame->uc.tuc_stack.ss_flags);
__put_user(target_sigaltstack_used.ss_size, &frame->uc.tuc_stack.ss_size);
err |= rt_setup_ucontext(&frame->uc, env);
for (i = 0; i < TARGET_NSIG_WORDS; i++) {
__put_user((abi_ulong)set->sig[i],
(abi_ulong *)&frame->uc.tuc_sigmask.sig[i]);
}
if (err) {
goto give_sigsegv;
}
/* Set up to return from userspace; jump to fixed address sigreturn
trampoline on kuser page. */
env->regs[R_RA] = (unsigned long) (0x1044);
/* Set up registers for signal handler */
env->regs[R_SP] = (unsigned long) frame;
env->regs[4] = (unsigned long) sig;
env->regs[5] = (unsigned long) &frame->info;
env->regs[6] = (unsigned long) &frame->uc;
env->regs[R_EA] = (unsigned long) ka->_sa_handler;
return;
give_sigsegv:
if (sig == TARGET_SIGSEGV) {
ka->_sa_handler = TARGET_SIG_DFL;
}
force_sigsegv(sig);
return;
}
long do_sigreturn(CPUNios2State *env)
{
trace_user_do_sigreturn(env, 0);
fprintf(stderr, "do_sigreturn: not implemented\n");
return -TARGET_ENOSYS;
}
long do_rt_sigreturn(CPUNios2State *env)
{
/* Verify, can we follow the stack back */
abi_ulong frame_addr = env->regs[R_SP];
struct target_rt_sigframe *frame;
sigset_t set;
int rval;
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
goto badframe;
}
target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
do_sigprocmask(SIG_SETMASK, &set, NULL);
if (rt_restore_ucontext(env, &frame->uc, &rval)) {
goto badframe;
}
unlock_user_struct(frame, frame_addr, 0);
return rval;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
return 0;
}
/* TARGET_NIOS2 */
#elif defined(TARGET_OPENRISC)
struct target_sigcontext {
@ -6178,7 +6412,8 @@ static void handle_pending_signal(CPUArchState *cpu_env, int sig,
/* prepare the stack frame of the virtual CPU */
#if defined(TARGET_ABI_MIPSN32) || defined(TARGET_ABI_MIPSN64) \
|| defined(TARGET_OPENRISC) || defined(TARGET_TILEGX) \
|| defined(TARGET_PPC64) || defined(TARGET_HPPA)
|| defined(TARGET_PPC64) || defined(TARGET_HPPA) \
|| defined(TARGET_NIOS2)
/* These targets do not have traditional signals. */
setup_rt_frame(sig, sa, &k->info, &target_old_set, cpu_env);
#else

8
linux-user/syscall_defs.h
View File

@ -70,7 +70,8 @@
#if defined(TARGET_I386) || defined(TARGET_ARM) || defined(TARGET_SH4) \
|| defined(TARGET_M68K) || defined(TARGET_CRIS) \
|| defined(TARGET_UNICORE32) || defined(TARGET_S390X) \
|| defined(TARGET_OPENRISC) || defined(TARGET_TILEGX)
|| defined(TARGET_OPENRISC) || defined(TARGET_TILEGX) \
|| defined(TARGET_NIOS2)
#define TARGET_IOC_SIZEBITS 14
#define TARGET_IOC_DIRBITS 2
@ -426,7 +427,7 @@ int do_sigaction(int sig, const struct target_sigaction *act,
|| defined(TARGET_M68K) || defined(TARGET_ALPHA) || defined(TARGET_CRIS) \
|| defined(TARGET_MICROBLAZE) || defined(TARGET_UNICORE32) \
|| defined(TARGET_S390X) || defined(TARGET_OPENRISC) \
|| defined(TARGET_TILEGX) || defined(TARGET_HPPA)
|| defined(TARGET_TILEGX) || defined(TARGET_HPPA) || defined(TARGET_NIOS2)
#if defined(TARGET_SPARC)
#define TARGET_SA_NOCLDSTOP 8u
@ -2037,7 +2038,8 @@ struct target_stat {
abi_ulong target_st_ctime_nsec;
unsigned int __unused[2];
};
#elif defined(TARGET_OPENRISC) || defined(TARGET_TILEGX)
#elif defined(TARGET_OPENRISC) || defined(TARGET_TILEGX) || \
defined(TARGET_NIOS2)
/* These are the asm-generic versions of the stat and stat64 structures */

3
qemu-doc.texi
View File

@ -2901,6 +2901,9 @@ The binary format is detected automatically.
@command{qemu-mips} TODO.
@command{qemu-mipsel} TODO.
@cindex user mode (NiosII)
@command{qemu-nios2} TODO.
@cindex user mode (PowerPC)
@command{qemu-ppc64abi32} TODO.
@command{qemu-ppc64} TODO.

4
target/nios2/Makefile.objs Normal file
View File

@ -0,0 +1,4 @@
obj-y += translate.o op_helper.o helper.o cpu.o mmu.o
obj-$(CONFIG_SOFTMMU) += monitor.o
$(obj)/op_helper.o: QEMU_CFLAGS += $(HELPER_CFLAGS)

237
target/nios2/cpu.c Normal file
View File

@ -0,0 +1,237 @@
/*
* QEMU Nios II CPU
*
* Copyright (c) 2012 Chris Wulff <crwulff@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "qapi/error.h"
#include "cpu.h"
#include "exec/log.h"
#include "exec/gdbstub.h"
#include "hw/qdev-properties.h"
static void nios2_cpu_set_pc(CPUState *cs, vaddr value)
{
Nios2CPU *cpu = NIOS2_CPU(cs);
CPUNios2State *env = &cpu->env;
env->regs[R_PC] = value;
}
static bool nios2_cpu_has_work(CPUState *cs)
{
return cs->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI);
}
/* CPUClass::reset() */
static void nios2_cpu_reset(CPUState *cs)
{
Nios2CPU *cpu = NIOS2_CPU(cs);
Nios2CPUClass *ncc = NIOS2_CPU_GET_CLASS(cpu);
CPUNios2State *env = &cpu->env;
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
qemu_log("CPU Reset (CPU %d)\n", cs->cpu_index);
log_cpu_state(cs, 0);
}
ncc->parent_reset(cs);
memset(env->regs, 0, sizeof(uint32_t) * NUM_CORE_REGS);
env->regs[R_PC] = cpu->reset_addr;
#if defined(CONFIG_USER_ONLY)
/* Start in user mode with interrupts enabled. */
env->regs[CR_STATUS] = CR_STATUS_U | CR_STATUS_PIE;
#else
env->regs[CR_STATUS] = 0;
#endif
}
static void nios2_cpu_initfn(Object *obj)
{
CPUState *cs = CPU(obj);
Nios2CPU *cpu = NIOS2_CPU(obj);
CPUNios2State *env = &cpu->env;
static bool tcg_initialized;
cs->env_ptr = env;
#if !defined(CONFIG_USER_ONLY)
mmu_init(env);
#endif
if (tcg_enabled() && !tcg_initialized) {
tcg_initialized = true;
nios2_tcg_init();
}
}
Nios2CPU *cpu_nios2_init(const char *cpu_model)
{
Nios2CPU *cpu = NIOS2_CPU(object_new(TYPE_NIOS2_CPU));
object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
return cpu;
}
static void nios2_cpu_realizefn(DeviceState *dev, Error **errp)
{
CPUState *cs = CPU(dev);
Nios2CPUClass *ncc = NIOS2_CPU_GET_CLASS(dev);
Error *local_err = NULL;
cpu_exec_realizefn(cs, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
return;
}
qemu_init_vcpu(cs);
cpu_reset(cs);
ncc->parent_realize(dev, errp);
}
static bool nios2_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
{
Nios2CPU *cpu = NIOS2_CPU(cs);
CPUNios2State *env = &cpu->env;
if ((interrupt_request & CPU_INTERRUPT_HARD) &&
(env->regs[CR_STATUS] & CR_STATUS_PIE)) {
cs->exception_index = EXCP_IRQ;
nios2_cpu_do_interrupt(cs);
return true;
}
return false;
}
static void nios2_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
{
/* NOTE: NiosII R2 is not supported yet. */
info->mach = bfd_arch_nios2;
#ifdef TARGET_WORDS_BIGENDIAN
info->print_insn = print_insn_big_nios2;
#else
info->print_insn = print_insn_little_nios2;
#endif
}
static int nios2_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
{
Nios2CPU *cpu = NIOS2_CPU(cs);
CPUClass *cc = CPU_GET_CLASS(cs);
CPUNios2State *env = &cpu->env;
if (n > cc->gdb_num_core_regs) {
return 0;
}
if (n < 32) { /* GP regs */
return gdb_get_reg32(mem_buf, env->regs[n]);
} else if (n == 32) { /* PC */
return gdb_get_reg32(mem_buf, env->regs[R_PC]);
} else if (n < 49) { /* Status regs */
return gdb_get_reg32(mem_buf, env->regs[n - 1]);
}
/* Invalid regs */
return 0;
}
static int nios2_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
{
Nios2CPU *cpu = NIOS2_CPU(cs);
CPUClass *cc = CPU_GET_CLASS(cs);
CPUNios2State *env = &cpu->env;
if (n > cc->gdb_num_core_regs) {
return 0;
}
if (n < 32) { /* GP regs */
env->regs[n] = ldl_p(mem_buf);
} else if (n == 32) { /* PC */
env->regs[R_PC] = ldl_p(mem_buf);
} else if (n < 49) { /* Status regs */
env->regs[n - 1] = ldl_p(mem_buf);
}
return 4;
}
static Property nios2_properties[] = {
DEFINE_PROP_BOOL("mmu_present", Nios2CPU, mmu_present, true),
/* ALTR,pid-num-bits */
DEFINE_PROP_UINT32("mmu_pid_num_bits", Nios2CPU, pid_num_bits, 8),
/* ALTR,tlb-num-ways */
DEFINE_PROP_UINT32("mmu_tlb_num_ways", Nios2CPU, tlb_num_ways, 16),
/* ALTR,tlb-num-entries */
DEFINE_PROP_UINT32("mmu_pid_num_entries", Nios2CPU, tlb_num_entries, 256),
DEFINE_PROP_END_OF_LIST(),
};
static void nios2_cpu_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
CPUClass *cc = CPU_CLASS(oc);
Nios2CPUClass *ncc = NIOS2_CPU_CLASS(oc);
ncc->parent_realize = dc->realize;
dc->realize = nios2_cpu_realizefn;
dc->props = nios2_properties;
ncc->parent_reset = cc->reset;
cc->reset = nios2_cpu_reset;
cc->has_work = nios2_cpu_has_work;
cc->do_interrupt = nios2_cpu_do_interrupt;
cc->cpu_exec_interrupt = nios2_cpu_exec_interrupt;
cc->dump_state = nios2_cpu_dump_state;
cc->set_pc = nios2_cpu_set_pc;
cc->disas_set_info = nios2_cpu_disas_set_info;
#ifdef CONFIG_USER_ONLY
cc->handle_mmu_fault = nios2_cpu_handle_mmu_fault;
#else
cc->do_unaligned_access = nios2_cpu_do_unaligned_access;
cc->get_phys_page_debug = nios2_cpu_get_phys_page_debug;
#endif
cc->gdb_read_register = nios2_cpu_gdb_read_register;
cc->gdb_write_register = nios2_cpu_gdb_write_register;
cc->gdb_num_core_regs = 49;
}
static const TypeInfo nios2_cpu_type_info = {
.name = TYPE_NIOS2_CPU,
.parent = TYPE_CPU,
.instance_size = sizeof(Nios2CPU),
.instance_init = nios2_cpu_initfn,
.class_size = sizeof(Nios2CPUClass),
.class_init = nios2_cpu_class_init,
};
static void nios2_cpu_register_types(void)
{
type_register_static(&nios2_cpu_type_info);
}
type_init(nios2_cpu_register_types)

272
target/nios2/cpu.h Normal file
View File

@ -0,0 +1,272 @@
/*
* Altera Nios II virtual CPU header
*
* Copyright (c) 2012 Chris Wulff <crwulff@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>
*/
#ifndef CPU_NIOS2_H
#define CPU_NIOS2_H
#include "qemu/osdep.h"
#include "qemu-common.h"
#define TARGET_LONG_BITS 32
#define CPUArchState struct CPUNios2State
#include "exec/cpu-defs.h"
#include "fpu/softfloat.h"
#include "qom/cpu.h"
struct CPUNios2State;
typedef struct CPUNios2State CPUNios2State;
#if !defined(CONFIG_USER_ONLY)
#include "mmu.h"
#endif
#define TYPE_NIOS2_CPU "nios2-cpu"
#define NIOS2_CPU_CLASS(klass) \
OBJECT_CLASS_CHECK(Nios2CPUClass, (klass), TYPE_NIOS2_CPU)
#define NIOS2_CPU(obj) \
OBJECT_CHECK(Nios2CPU, (obj), TYPE_NIOS2_CPU)
#define NIOS2_CPU_GET_CLASS(obj) \
OBJECT_GET_CLASS(Nios2CPUClass, (obj), TYPE_NIOS2_CPU)
/**
* Nios2CPUClass:
* @parent_reset: The parent class' reset handler.
*
* A Nios2 CPU model.
*/
typedef struct Nios2CPUClass {
/*< private >*/
CPUClass parent_class;
/*< public >*/
DeviceRealize parent_realize;
void (*parent_reset)(CPUState *cpu);
} Nios2CPUClass;
#define TARGET_HAS_ICE 1
/* Configuration options for Nios II */
#define RESET_ADDRESS 0x00000000
#define EXCEPTION_ADDRESS 0x00000004
#define FAST_TLB_MISS_ADDRESS 0x00000008
/* GP regs + CR regs + PC */
#define NUM_CORE_REGS (32 + 32 + 1)
/* General purpose register aliases */
#define R_ZERO 0
#define R_AT 1
#define R_RET0 2
#define R_RET1 3
#define R_ARG0 4
#define R_ARG1 5
#define R_ARG2 6
#define R_ARG3 7
#define R_ET 24
#define R_BT 25
#define R_GP 26
#define R_SP 27
#define R_FP 28
#define R_EA 29
#define R_BA 30
#define R_RA 31
/* Control register aliases */
#define CR_BASE 32
#define CR_STATUS (CR_BASE + 0)
#define CR_STATUS_PIE (1 << 0)
#define CR_STATUS_U (1 << 1)
#define CR_STATUS_EH (1 << 2)
#define CR_STATUS_IH (1 << 3)
#define CR_STATUS_IL (63 << 4)
#define CR_STATUS_CRS (63 << 10)
#define CR_STATUS_PRS (63 << 16)
#define CR_STATUS_NMI (1 << 22)
#define CR_STATUS_RSIE (1 << 23)
#define CR_ESTATUS (CR_BASE + 1)
#define CR_BSTATUS (CR_BASE + 2)
#define CR_IENABLE (CR_BASE + 3)
#define CR_IPENDING (CR_BASE + 4)
#define CR_CPUID (CR_BASE + 5)
#define CR_CTL6 (CR_BASE + 6)
#define CR_EXCEPTION (CR_BASE + 7)
#define CR_PTEADDR (CR_BASE + 8)
#define CR_PTEADDR_PTBASE_SHIFT 22
#define CR_PTEADDR_PTBASE_MASK (0x3FF << CR_PTEADDR_PTBASE_SHIFT)
#define CR_PTEADDR_VPN_SHIFT 2
#define CR_PTEADDR_VPN_MASK (0xFFFFF << CR_PTEADDR_VPN_SHIFT)
#define CR_TLBACC (CR_BASE + 9)
#define CR_TLBACC_IGN_SHIFT 25
#define CR_TLBACC_IGN_MASK (0x7F << CR_TLBACC_IGN_SHIFT)
#define CR_TLBACC_C (1 << 24)
#define CR_TLBACC_R (1 << 23)
#define CR_TLBACC_W (1 << 22)
#define CR_TLBACC_X (1 << 21)
#define CR_TLBACC_G (1 << 20)
#define CR_TLBACC_PFN_MASK 0x000FFFFF
#define CR_TLBMISC (CR_BASE + 10)
#define CR_TLBMISC_WAY_SHIFT 20
#define CR_TLBMISC_WAY_MASK (0xF << CR_TLBMISC_WAY_SHIFT)
#define CR_TLBMISC_RD (1 << 19)
#define CR_TLBMISC_WR (1 << 18)
#define CR_TLBMISC_PID_SHIFT 4
#define CR_TLBMISC_PID_MASK (0x3FFF << CR_TLBMISC_PID_SHIFT)
#define CR_TLBMISC_DBL (1 << 3)
#define CR_TLBMISC_BAD (1 << 2)
#define CR_TLBMISC_PERM (1 << 1)
#define CR_TLBMISC_D (1 << 0)
#define CR_ENCINJ (CR_BASE + 11)
#define CR_BADADDR (CR_BASE + 12)
#define CR_CONFIG (CR_BASE + 13)
#define CR_MPUBASE (CR_BASE + 14)
#define CR_MPUACC (CR_BASE + 15)
/* Other registers */
#define R_PC 64
/* Exceptions */
#define EXCP_BREAK -1
#define EXCP_RESET 0
#define EXCP_PRESET 1
#define EXCP_IRQ 2
#define EXCP_TRAP 3
#define EXCP_UNIMPL 4
#define EXCP_ILLEGAL 5
#define EXCP_UNALIGN 6
#define EXCP_UNALIGND 7
#define EXCP_DIV 8
#define EXCP_SUPERA 9
#define EXCP_SUPERI 10
#define EXCP_SUPERD 11
#define EXCP_TLBD 12
#define EXCP_TLBX 13
#define EXCP_TLBR 14
#define EXCP_TLBW 15
#define EXCP_MPUI 16
#define EXCP_MPUD 17
#define CPU_INTERRUPT_NMI CPU_INTERRUPT_TGT_EXT_3
#define NB_MMU_MODES 2
struct CPUNios2State {
uint32_t regs[NUM_CORE_REGS];
#if !defined(CONFIG_USER_ONLY)
Nios2MMU mmu;
uint32_t irq_pending;
#endif
CPU_COMMON
};
/**
* Nios2CPU:
* @env: #CPUNios2State
*
* A Nios2 CPU.
*/
typedef struct Nios2CPU {
/*< private >*/
CPUState parent_obj;
/*< public >*/
CPUNios2State env;
bool mmu_present;
uint32_t pid_num_bits;
uint32_t tlb_num_ways;
uint32_t tlb_num_entries;
/* Addresses that are hard-coded in the FPGA build settings */
uint32_t reset_addr;
uint32_t exception_addr;
uint32_t fast_tlb_miss_addr;
} Nios2CPU;
static inline Nios2CPU *nios2_env_get_cpu(CPUNios2State *env)
{
return NIOS2_CPU(container_of(env, Nios2CPU, env));
}
#define ENV_GET_CPU(e) CPU(nios2_env_get_cpu(e))
#define ENV_OFFSET offsetof(Nios2CPU, env)
void nios2_tcg_init(void);
Nios2CPU *cpu_nios2_init(const char *cpu_model);
void nios2_cpu_do_interrupt(CPUState *cs);
int cpu_nios2_signal_handler(int host_signum, void *pinfo, void *puc);
void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUNios2State *env);
void nios2_cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
int flags);
hwaddr nios2_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
void nios2_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
MMUAccessType access_type,
int mmu_idx, uintptr_t retaddr);
qemu_irq *nios2_cpu_pic_init(Nios2CPU *cpu);
void nios2_check_interrupts(CPUNios2State *env);
#define TARGET_PHYS_ADDR_SPACE_BITS 32
#define TARGET_VIRT_ADDR_SPACE_BITS 32
#define cpu_init(cpu_model) CPU(cpu_nios2_init(cpu_model))
#define cpu_gen_code cpu_nios2_gen_code
#define cpu_signal_handler cpu_nios2_signal_handler
#define CPU_SAVE_VERSION 1
#define TARGET_PAGE_BITS 12
/* MMU modes definitions */
#define MMU_MODE0_SUFFIX _kernel
#define MMU_MODE1_SUFFIX _user
#define MMU_SUPERVISOR_IDX 0
#define MMU_USER_IDX 1
static inline int cpu_mmu_index(CPUNios2State *env, bool ifetch)
{
return (env->regs[CR_STATUS] & CR_STATUS_U) ? MMU_USER_IDX :
MMU_SUPERVISOR_IDX;
}
int nios2_cpu_handle_mmu_fault(CPUState *env, vaddr address,
int rw, int mmu_idx);
static inline int cpu_interrupts_enabled(CPUNios2State *env)
{
return env->regs[CR_STATUS] & CR_STATUS_PIE;
}
#include "exec/cpu-all.h"
#include "exec/exec-all.h"
static inline void cpu_get_tb_cpu_state(CPUNios2State *env, target_ulong *pc,
target_ulong *cs_base, uint32_t *flags)
{
*pc = env->regs[R_PC];
*cs_base = 0;
*flags = (env->regs[CR_STATUS] & (CR_STATUS_EH | CR_STATUS_U));
}
#endif /* CPU_NIOS2_H */

313
target/nios2/helper.c Normal file
View File

@ -0,0 +1,313 @@
/*
* Altera Nios II helper routines.
*
* Copyright (c) 2012 Chris Wulff <crwulff@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>
*/
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "cpu.h"
#include "qemu/osdep.h"
#include "qemu/host-utils.h"
#include "qapi/error.h"
#include "exec/exec-all.h"
#include "exec/log.h"
#include "exec/helper-proto.h"
#if defined(CONFIG_USER_ONLY)
void nios2_cpu_do_interrupt(CPUState *cs)
{
Nios2CPU *cpu = NIOS2_CPU(cs);
CPUNios2State *env = &cpu->env;
cs->exception_index = -1;
env->regs[R_EA] = env->regs[R_PC] + 4;
}
int nios2_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw, int mmu_idx)
{
cs->exception_index = 0xaa;
/* Page 0x1000 is kuser helper */
if (address < 0x1000 || address >= 0x2000) {
cpu_dump_state(cs, stderr, fprintf, 0);
}
return 1;
}
#else /* !CONFIG_USER_ONLY */
void nios2_cpu_do_interrupt(CPUState *cs)
{
Nios2CPU *cpu = NIOS2_CPU(cs);
CPUNios2State *env = &cpu->env;
switch (cs->exception_index) {
case EXCP_IRQ:
assert(env->regs[CR_STATUS] & CR_STATUS_PIE);
qemu_log_mask(CPU_LOG_INT, "interrupt at pc=%x\n", env->regs[R_PC]);
env->regs[CR_ESTATUS] = env->regs[CR_STATUS];
env->regs[CR_STATUS] |= CR_STATUS_IH;
env->regs[CR_STATUS] &= ~(CR_STATUS_PIE | CR_STATUS_U);
env->regs[CR_EXCEPTION] &= ~(0x1F << 2);
env->regs[CR_EXCEPTION] |= (cs->exception_index & 0x1F) << 2;
env->regs[R_EA] = env->regs[R_PC] + 4;
env->regs[R_PC] = cpu->exception_addr;
break;
case EXCP_TLBD:
if ((env->regs[CR_STATUS] & CR_STATUS_EH) == 0) {
qemu_log_mask(CPU_LOG_INT, "TLB MISS (fast) at pc=%x\n",
env->regs[R_PC]);
/* Fast TLB miss */
/* Variation from the spec. Table 3-35 of the cpu reference shows
* estatus not being changed for TLB miss but this appears to
* be incorrect. */
env->regs[CR_ESTATUS] = env->regs[CR_STATUS];
env->regs[CR_STATUS] |= CR_STATUS_EH;
env->regs[CR_STATUS] &= ~(CR_STATUS_PIE | CR_STATUS_U);
env->regs[CR_EXCEPTION] &= ~(0x1F << 2);
env->regs[CR_EXCEPTION] |= (cs->exception_index & 0x1F) << 2;
env->regs[CR_TLBMISC] &= ~CR_TLBMISC_DBL;
env->regs[CR_TLBMISC] |= CR_TLBMISC_WR;
env->regs[R_EA] = env->regs[R_PC] + 4;
env->regs[R_PC] = cpu->fast_tlb_miss_addr;
} else {
qemu_log_mask(CPU_LOG_INT, "TLB MISS (double) at pc=%x\n",
env->regs[R_PC]);
/* Double TLB miss */
env->regs[CR_STATUS] |= CR_STATUS_EH;
env->regs[CR_STATUS] &= ~(CR_STATUS_PIE | CR_STATUS_U);
env->regs[CR_EXCEPTION] &= ~(0x1F << 2);
env->regs[CR_EXCEPTION] |= (cs->exception_index & 0x1F) << 2;
env->regs[CR_TLBMISC] |= CR_TLBMISC_DBL;
env->regs[R_PC] = cpu->exception_addr;
}
break;
case EXCP_TLBR:
case EXCP_TLBW:
case EXCP_TLBX:
qemu_log_mask(CPU_LOG_INT, "TLB PERM at pc=%x\n", env->regs[R_PC]);
env->regs[CR_ESTATUS] = env->regs[CR_STATUS];
env->regs[CR_STATUS] |= CR_STATUS_EH;
env->regs[CR_STATUS] &= ~(CR_STATUS_PIE | CR_STATUS_U);
env->regs[CR_EXCEPTION] &= ~(0x1F << 2);
env->regs[CR_EXCEPTION] |= (cs->exception_index & 0x1F) << 2;
if ((env->regs[CR_STATUS] & CR_STATUS_EH) == 0) {
env->regs[CR_TLBMISC] |= CR_TLBMISC_WR;
}
env->regs[R_EA] = env->regs[R_PC] + 4;
env->regs[R_PC] = cpu->exception_addr;
break;
case EXCP_SUPERA:
case EXCP_SUPERI:
case EXCP_SUPERD:
qemu_log_mask(CPU_LOG_INT, "SUPERVISOR exception at pc=%x\n",
env->regs[R_PC]);
if ((env->regs[CR_STATUS] & CR_STATUS_EH) == 0) {
env->regs[CR_ESTATUS] = env->regs[CR_STATUS];
env->regs[R_EA] = env->regs[R_PC] + 4;
}
env->regs[CR_STATUS] |= CR_STATUS_EH;
env->regs[CR_STATUS] &= ~(CR_STATUS_PIE | CR_STATUS_U);
env->regs[CR_EXCEPTION] &= ~(0x1F << 2);
env->regs[CR_EXCEPTION] |= (cs->exception_index & 0x1F) << 2;
env->regs[R_PC] = cpu->exception_addr;
break;
case EXCP_ILLEGAL:
case EXCP_TRAP:
qemu_log_mask(CPU_LOG_INT, "TRAP exception at pc=%x\n",
env->regs[R_PC]);
if ((env->regs[CR_STATUS] & CR_STATUS_EH) == 0) {
env->regs[CR_ESTATUS] = env->regs[CR_STATUS];
env->regs[R_EA] = env->regs[R_PC] + 4;
}
env->regs[CR_STATUS] |= CR_STATUS_EH;
env->regs[CR_STATUS] &= ~(CR_STATUS_PIE | CR_STATUS_U);
env->regs[CR_EXCEPTION] &= ~(0x1F << 2);
env->regs[CR_EXCEPTION] |= (cs->exception_index & 0x1F) << 2;
env->regs[R_PC] = cpu->exception_addr;
break;
case EXCP_BREAK:
if ((env->regs[CR_STATUS] & CR_STATUS_EH) == 0) {
env->regs[CR_BSTATUS] = env->regs[CR_STATUS];
env->regs[R_BA] = env->regs[R_PC] + 4;
}
env->regs[CR_STATUS] |= CR_STATUS_EH;
env->regs[CR_STATUS] &= ~(CR_STATUS_PIE | CR_STATUS_U);
env->regs[CR_EXCEPTION] &= ~(0x1F << 2);
env->regs[CR_EXCEPTION] |= (cs->exception_index & 0x1F) << 2;
env->regs[R_PC] = cpu->exception_addr;
break;
default:
cpu_abort(cs, "unhandled exception type=%d\n",
cs->exception_index);
break;
}
}
static int cpu_nios2_handle_virtual_page(
CPUState *cs, target_ulong address, int rw, int mmu_idx)
{
Nios2CPU *cpu = NIOS2_CPU(cs);
CPUNios2State *env = &cpu->env;
target_ulong vaddr, paddr;
Nios2MMULookup lu;
unsigned int hit;
hit = mmu_translate(env, &lu, address, rw, mmu_idx);
if (hit) {
vaddr = address & TARGET_PAGE_MASK;
paddr = lu.paddr + vaddr - lu.vaddr;
if (((rw == 0) && (lu.prot & PAGE_READ)) ||
((rw == 1) && (lu.prot & PAGE_WRITE)) ||
((rw == 2) && (lu.prot & PAGE_EXEC))) {
tlb_set_page(cs, vaddr, paddr, lu.prot,
mmu_idx, TARGET_PAGE_SIZE);
return 0;
} else {
/* Permission violation */
cs->exception_index = (rw == 0) ? EXCP_TLBR :
((rw == 1) ? EXCP_TLBW :
EXCP_TLBX);
}
} else {
cs->exception_index = EXCP_TLBD;
}
if (rw == 2) {
env->regs[CR_TLBMISC] &= ~CR_TLBMISC_D;
} else {
env->regs[CR_TLBMISC] |= CR_TLBMISC_D;
}
env->regs[CR_PTEADDR] &= CR_PTEADDR_PTBASE_MASK;
env->regs[CR_PTEADDR] |= (address >> 10) & CR_PTEADDR_VPN_MASK;
env->mmu.pteaddr_wr = env->regs[CR_PTEADDR];
env->regs[CR_BADADDR] = address;
return 1;
}
int nios2_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw, int mmu_idx)
{
Nios2CPU *cpu = NIOS2_CPU(cs);
CPUNios2State *env = &cpu->env;
if (cpu->mmu_present) {
if (MMU_SUPERVISOR_IDX == mmu_idx) {
if (address >= 0xC0000000) {
/* Kernel physical page - TLB bypassed */
address &= TARGET_PAGE_MASK;
tlb_set_page(cs, address, address, PAGE_BITS,
mmu_idx, TARGET_PAGE_SIZE);
} else if (address >= 0x80000000) {
/* Kernel virtual page */
return cpu_nios2_handle_virtual_page(cs, address, rw, mmu_idx);
} else {
/* User virtual page */
return cpu_nios2_handle_virtual_page(cs, address, rw, mmu_idx);
}
} else {
if (address >= 0x80000000) {
/* Illegal access from user mode */
cs->exception_index = EXCP_SUPERA;
env->regs[CR_BADADDR] = address;
return 1;
} else {
/* User virtual page */
return cpu_nios2_handle_virtual_page(cs, address, rw, mmu_idx);
}
}
} else {
/* No MMU */
address &= TARGET_PAGE_MASK;
tlb_set_page(cs, address, address, PAGE_BITS,
mmu_idx, TARGET_PAGE_SIZE);
}
return 0;
}
hwaddr nios2_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
{
Nios2CPU *cpu = NIOS2_CPU(cs);
CPUNios2State *env = &cpu->env;
target_ulong vaddr, paddr = 0;
Nios2MMULookup lu;
unsigned int hit;
if (cpu->mmu_present && (addr < 0xC0000000)) {
hit = mmu_translate(env, &lu, addr, 0, 0);
if (hit) {
vaddr = addr & TARGET_PAGE_MASK;
paddr = lu.paddr + vaddr - lu.vaddr;
} else {
paddr = -1;
qemu_log("cpu_get_phys_page debug MISS: %#" PRIx64 "\n", addr);
}
} else {
paddr = addr & TARGET_PAGE_MASK;
}
return paddr;
}
void nios2_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
MMUAccessType access_type,
int mmu_idx, uintptr_t retaddr)
{
Nios2CPU *cpu = NIOS2_CPU(cs);
CPUNios2State *env = &cpu->env;
env->regs[CR_BADADDR] = addr;
env->regs[CR_EXCEPTION] = EXCP_UNALIGN << 2;
helper_raise_exception(env, EXCP_UNALIGN);
}
#endif /* !CONFIG_USER_ONLY */

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/*
* Altera Nios II helper routines header.
*
* Copyright (c) 2012 Chris Wulff <crwulff@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>
*/
DEF_HELPER_2(raise_exception, void, env, i32)
#if !defined(CONFIG_USER_ONLY)
DEF_HELPER_2(mmu_read_debug, void, env, i32)
DEF_HELPER_3(mmu_write, void, env, i32, i32)
DEF_HELPER_1(check_interrupts, void, env)
#endif

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/*
* Altera Nios II MMU emulation for qemu.
*
* Copyright (C) 2012 Chris Wulff <crwulff@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "cpu.h"
#include "exec/exec-all.h"
#include "mmu.h"
#if !defined(CONFIG_USER_ONLY)
/* Define this to enable MMU debug messages */
/* #define DEBUG_MMU */
#ifdef DEBUG_MMU
#define MMU_LOG(x) x
#else
#define MMU_LOG(x)
#endif
void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type,
int mmu_idx, uintptr_t retaddr)
{
int ret;
ret = nios2_cpu_handle_mmu_fault(cs, addr, access_type, mmu_idx);
if (unlikely(ret)) {
if (retaddr) {
/* now we have a real cpu fault */
cpu_restore_state(cs, retaddr);
}
cpu_loop_exit(cs);
}
}
void mmu_read_debug(CPUNios2State *env, uint32_t rn)
{
switch (rn) {
case CR_TLBACC:
MMU_LOG(qemu_log("TLBACC READ %08X\n", env->regs[rn]));
break;
case CR_TLBMISC:
MMU_LOG(qemu_log("TLBMISC READ %08X\n", env->regs[rn]));
break;
case CR_PTEADDR:
MMU_LOG(qemu_log("PTEADDR READ %08X\n", env->regs[rn]));
break;
default:
break;
}
}
/* rw - 0 = read, 1 = write, 2 = fetch. */
unsigned int mmu_translate(CPUNios2State *env,
Nios2MMULookup *lu,
target_ulong vaddr, int rw, int mmu_idx)
{
Nios2CPU *cpu = nios2_env_get_cpu(env);
int pid = (env->mmu.tlbmisc_wr & CR_TLBMISC_PID_MASK) >> 4;
int vpn = vaddr >> 12;
MMU_LOG(qemu_log("mmu_translate vaddr %08X, pid %08X, vpn %08X\n",
vaddr, pid, vpn));
int way;
for (way = 0; way < cpu->tlb_num_ways; way++) {
Nios2TLBEntry *entry =
&env->mmu.tlb[(way * cpu->tlb_num_ways) +
(vpn & env->mmu.tlb_entry_mask)];
MMU_LOG(qemu_log("TLB[%d] TAG %08X, VPN %08X\n",
(way * cpu->tlb_num_ways) +
(vpn & env->mmu.tlb_entry_mask),
entry->tag, (entry->tag >> 12)));
if (((entry->tag >> 12) != vpn) ||
(((entry->tag & (1 << 11)) == 0) &&
((entry->tag & ((1 << cpu->pid_num_bits) - 1)) != pid))) {
continue;
}
lu->vaddr = vaddr & TARGET_PAGE_MASK;
lu->paddr = (entry->data & CR_TLBACC_PFN_MASK) << TARGET_PAGE_BITS;
lu->prot = ((entry->data & CR_TLBACC_R) ? PAGE_READ : 0) |
((entry->data & CR_TLBACC_W) ? PAGE_WRITE : 0) |
((entry->data & CR_TLBACC_X) ? PAGE_EXEC : 0);
MMU_LOG(qemu_log("HIT TLB[%d] %08X %08X %08X\n",
(way * cpu->tlb_num_ways) +
(vpn & env->mmu.tlb_entry_mask),
lu->vaddr, lu->paddr, lu->prot));
return 1;
}
return 0;
}
static void mmu_flush_pid(CPUNios2State *env, uint32_t pid)
{
CPUState *cs = ENV_GET_CPU(env);
Nios2CPU *cpu = nios2_env_get_cpu(env);
int idx;
MMU_LOG(qemu_log("TLB Flush PID %d\n", pid));
for (idx = 0; idx < cpu->tlb_num_entries; idx++) {
Nios2TLBEntry *entry = &env->mmu.tlb[idx];
MMU_LOG(qemu_log("TLB[%d] => %08X %08X\n",
idx, entry->tag, entry->data));
if ((entry->tag & (1 << 10)) && (!(entry->tag & (1 << 11))) &&
((entry->tag & ((1 << cpu->pid_num_bits) - 1)) == pid)) {
uint32_t vaddr = entry->tag & TARGET_PAGE_MASK;
MMU_LOG(qemu_log("TLB Flush Page %08X\n", vaddr));
tlb_flush_page(cs, vaddr);
}
}
}
void mmu_write(CPUNios2State *env, uint32_t rn, uint32_t v)
{
CPUState *cs = ENV_GET_CPU(env);
Nios2CPU *cpu = nios2_env_get_cpu(env);
MMU_LOG(qemu_log("mmu_write %08X = %08X\n", rn, v));
switch (rn) {
case CR_TLBACC:
MMU_LOG(qemu_log("TLBACC: IG %02X, FLAGS %c%c%c%c%c, PFN %05X\n",
v >> CR_TLBACC_IGN_SHIFT,
(v & CR_TLBACC_C) ? 'C' : '.',
(v & CR_TLBACC_R) ? 'R' : '.',
(v & CR_TLBACC_W) ? 'W' : '.',
(v & CR_TLBACC_X) ? 'X' : '.',
(v & CR_TLBACC_G) ? 'G' : '.',
v & CR_TLBACC_PFN_MASK));
/* if tlbmisc.WE == 1 then trigger a TLB write on writes to TLBACC */
if (env->regs[CR_TLBMISC] & CR_TLBMISC_WR) {
int way = (env->regs[CR_TLBMISC] >> CR_TLBMISC_WAY_SHIFT);
int vpn = (env->mmu.pteaddr_wr & CR_PTEADDR_VPN_MASK) >> 2;
int pid = (env->mmu.tlbmisc_wr & CR_TLBMISC_PID_MASK) >> 4;
int g = (v & CR_TLBACC_G) ? 1 : 0;
int valid = ((vpn & CR_TLBACC_PFN_MASK) < 0xC0000) ? 1 : 0;
Nios2TLBEntry *entry =
&env->mmu.tlb[(way * cpu->tlb_num_ways) +
(vpn & env->mmu.tlb_entry_mask)];
uint32_t newTag = (vpn << 12) | (g << 11) | (valid << 10) | pid;
uint32_t newData = v & (CR_TLBACC_C | CR_TLBACC_R | CR_TLBACC_W |
CR_TLBACC_X | CR_TLBACC_PFN_MASK);
if ((entry->tag != newTag) || (entry->data != newData)) {
if (entry->tag & (1 << 10)) {
/* Flush existing entry */
MMU_LOG(qemu_log("TLB Flush Page (OLD) %08X\n",
entry->tag & TARGET_PAGE_MASK));
tlb_flush_page(cs, entry->tag & TARGET_PAGE_MASK);
}
entry->tag = newTag;
entry->data = newData;
MMU_LOG(qemu_log("TLB[%d] = %08X %08X\n",
(way * cpu->tlb_num_ways) +
(vpn & env->mmu.tlb_entry_mask),
entry->tag, entry->data));
}
/* Auto-increment tlbmisc.WAY */
env->regs[CR_TLBMISC] =
(env->regs[CR_TLBMISC] & ~CR_TLBMISC_WAY_MASK) |
(((way + 1) & (cpu->tlb_num_ways - 1)) <<
CR_TLBMISC_WAY_SHIFT);
}
/* Writes to TLBACC don't change the read-back value */
env->mmu.tlbacc_wr = v;
break;
case CR_TLBMISC:
MMU_LOG(qemu_log("TLBMISC: WAY %X, FLAGS %c%c%c%c%c%c, PID %04X\n",
v >> CR_TLBMISC_WAY_SHIFT,
(v & CR_TLBMISC_RD) ? 'R' : '.',
(v & CR_TLBMISC_WR) ? 'W' : '.',
(v & CR_TLBMISC_DBL) ? '2' : '.',
(v & CR_TLBMISC_BAD) ? 'B' : '.',
(v & CR_TLBMISC_PERM) ? 'P' : '.',
(v & CR_TLBMISC_D) ? 'D' : '.',
(v & CR_TLBMISC_PID_MASK) >> 4));
if ((v & CR_TLBMISC_PID_MASK) !=
(env->mmu.tlbmisc_wr & CR_TLBMISC_PID_MASK)) {
mmu_flush_pid(env, (env->mmu.tlbmisc_wr & CR_TLBMISC_PID_MASK) >>
CR_TLBMISC_PID_SHIFT);
}
/* if tlbmisc.RD == 1 then trigger a TLB read on writes to TLBMISC */
if (v & CR_TLBMISC_RD) {
int way = (v >> CR_TLBMISC_WAY_SHIFT);
int vpn = (env->mmu.pteaddr_wr & CR_PTEADDR_VPN_MASK) >> 2;
Nios2TLBEntry *entry =
&env->mmu.tlb[(way * cpu->tlb_num_ways) +
(vpn & env->mmu.tlb_entry_mask)];
env->regs[CR_TLBACC] &= CR_TLBACC_IGN_MASK;
env->regs[CR_TLBACC] |= entry->data;
env->regs[CR_TLBACC] |= (entry->tag & (1 << 11)) ? CR_TLBACC_G : 0;
env->regs[CR_TLBMISC] =
(v & ~CR_TLBMISC_PID_MASK) |
((entry->tag & ((1 << cpu->pid_num_bits) - 1)) <<
CR_TLBMISC_PID_SHIFT);
env->regs[CR_PTEADDR] &= ~CR_PTEADDR_VPN_MASK;
env->regs[CR_PTEADDR] |= (entry->tag >> 12) << CR_PTEADDR_VPN_SHIFT;
MMU_LOG(qemu_log("TLB READ way %d, vpn %05X, tag %08X, data %08X, "
"tlbacc %08X, tlbmisc %08X, pteaddr %08X\n",
way, vpn, entry->tag, entry->data,
env->regs[CR_TLBACC], env->regs[CR_TLBMISC],
env->regs[CR_PTEADDR]));
} else {
env->regs[CR_TLBMISC] = v;
}
env->mmu.tlbmisc_wr = v;
break;
case CR_PTEADDR:
MMU_LOG(qemu_log("PTEADDR: PTBASE %03X, VPN %05X\n",
v >> CR_PTEADDR_PTBASE_SHIFT,
(v & CR_PTEADDR_VPN_MASK) >> CR_PTEADDR_VPN_SHIFT));
/* Writes to PTEADDR don't change the read-back VPN value */
env->regs[CR_PTEADDR] = (v & ~CR_PTEADDR_VPN_MASK) |
(env->regs[CR_PTEADDR] & CR_PTEADDR_VPN_MASK);
env->mmu.pteaddr_wr = v;
break;
default:
break;
}
}
void mmu_init(CPUNios2State *env)
{
Nios2CPU *cpu = nios2_env_get_cpu(env);
Nios2MMU *mmu = &env->mmu;
MMU_LOG(qemu_log("mmu_init\n"));
mmu->tlb_entry_mask = (cpu->tlb_num_entries / cpu->tlb_num_ways) - 1;
mmu->tlb = g_new0(Nios2TLBEntry, cpu->tlb_num_entries);
}
void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUNios2State *env)
{
Nios2CPU *cpu = nios2_env_get_cpu(env);
int i;
cpu_fprintf(f, "MMU: ways %d, entries %d, pid bits %d\n",
cpu->tlb_num_ways, cpu->tlb_num_entries,
cpu->pid_num_bits);
for (i = 0; i < cpu->tlb_num_entries; i++) {
Nios2TLBEntry *entry = &env->mmu.tlb[i];
cpu_fprintf(f, "TLB[%d] = %08X %08X %c VPN %05X "
"PID %02X %c PFN %05X %c%c%c%c\n",
i, entry->tag, entry->data,
(entry->tag & (1 << 10)) ? 'V' : '-',
entry->tag >> 12,
entry->tag & ((1 << cpu->pid_num_bits) - 1),
(entry->tag & (1 << 11)) ? 'G' : '-',
entry->data & CR_TLBACC_PFN_MASK,
(entry->data & CR_TLBACC_C) ? 'C' : '-',
(entry->data & CR_TLBACC_R) ? 'R' : '-',
(entry->data & CR_TLBACC_W) ? 'W' : '-',
(entry->data & CR_TLBACC_X) ? 'X' : '-');
}
}
#endif /* !CONFIG_USER_ONLY */

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/*
* Altera Nios II MMU emulation for qemu.
*
* Copyright (C) 2012 Chris Wulff <crwulff@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>
*/
#ifndef MMU_NIOS2_H
#define MMU_NIOS2_H
typedef struct Nios2TLBEntry {
target_ulong tag;
target_ulong data;
} Nios2TLBEntry;
typedef struct Nios2MMU {
int tlb_entry_mask;
uint32_t pteaddr_wr;
uint32_t tlbacc_wr;
uint32_t tlbmisc_wr;
Nios2TLBEntry *tlb;
} Nios2MMU;
typedef struct Nios2MMULookup {
target_ulong vaddr;
target_ulong paddr;
int prot;
} Nios2MMULookup;
void mmu_flip_um(CPUNios2State *env, unsigned int um);
unsigned int mmu_translate(CPUNios2State *env,
Nios2MMULookup *lu,
target_ulong vaddr, int rw, int mmu_idx);
void mmu_read_debug(CPUNios2State *env, uint32_t rn);
void mmu_write(CPUNios2State *env, uint32_t rn, uint32_t v);
void mmu_init(CPUNios2State *env);
#endif /* MMU_NIOS2_H */

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/*
* QEMU monitor
*
* Copyright (c) 2003-2004 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "monitor/monitor.h"
#include "monitor/hmp-target.h"
#include "hmp.h"
void hmp_info_tlb(Monitor *mon, const QDict *qdict)
{
CPUArchState *env1 = mon_get_cpu_env();
dump_mmu((FILE *)mon, (fprintf_function)monitor_printf, env1);
}

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/*
* Altera Nios II helper routines.
*
* Copyright (C) 2012 Chris Wulff <crwulff@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>
*/
#include "cpu.h"
#include "exec/helper-proto.h"
#include "exec/cpu_ldst.h"
#if !defined(CONFIG_USER_ONLY)
void helper_mmu_read_debug(CPUNios2State *env, uint32_t rn)
{
mmu_read_debug(env, rn);
}
void helper_mmu_write(CPUNios2State *env, uint32_t rn, uint32_t v)
{
mmu_write(env, rn, v);
}
void helper_check_interrupts(CPUNios2State *env)
{
nios2_check_interrupts(env);
}
#endif /* !CONFIG_USER_ONLY */
void helper_raise_exception(CPUNios2State *env, uint32_t index)
{
CPUState *cs = ENV_GET_CPU(env);
cs->exception_index = index;
cpu_loop_exit(cs);
}

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/*
* Altera Nios II emulation for qemu: main translation routines.
*
* Copyright (C) 2016 Marek Vasut <marex@denx.de>
* Copyright (C) 2012 Chris Wulff <crwulff@gmail.com>
* Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
* (Portions of this file that were originally from nios2sim-ng.)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>
*/
#include "cpu.h"
#include "tcg-op.h"
#include "exec/exec-all.h"
#include "disas/disas.h"
#include "exec/helper-proto.h"
#include "exec/helper-gen.h"
#include "exec/log.h"
#include "exec/cpu_ldst.h"
#define INSTRUCTION_FLG(func, flags) { (func), (flags) }
#define INSTRUCTION(func) \
INSTRUCTION_FLG(func, 0)
#define INSTRUCTION_NOP() \
INSTRUCTION_FLG(nop, 0)
#define INSTRUCTION_UNIMPLEMENTED() \
INSTRUCTION_FLG(gen_excp, EXCP_UNIMPL)
#define INSTRUCTION_ILLEGAL() \
INSTRUCTION_FLG(gen_excp, EXCP_ILLEGAL)
/* Special R-Type instruction opcode */
#define INSN_R_TYPE 0x3A
/* I-Type instruction parsing */
#define I_TYPE(instr, code) \
struct { \
uint8_t op; \
union { \
uint16_t imm16; \
int16_t imm16s; \
}; \
uint8_t b; \
uint8_t a; \
} (instr) = { \
.op = extract32((code), 0, 6), \
.imm16 = extract32((code), 6, 16), \
.b = extract32((code), 22, 5), \
.a = extract32((code), 27, 5), \
}
/* R-Type instruction parsing */
#define R_TYPE(instr, code) \
struct { \
uint8_t op; \
uint8_t imm5; \
uint8_t opx; \
uint8_t c; \
uint8_t b; \
uint8_t a; \
} (instr) = { \
.op = extract32((code), 0, 6), \
.imm5 = extract32((code), 6, 5), \
.opx = extract32((code), 11, 6), \
.c = extract32((code), 17, 5), \
.b = extract32((code), 22, 5), \
.a = extract32((code), 27, 5), \
}
/* J-Type instruction parsing */
#define J_TYPE(instr, code) \
struct { \
uint8_t op; \
uint32_t imm26; \
} (instr) = { \
.op = extract32((code), 0, 6), \
.imm26 = extract32((code), 6, 26), \
}
typedef struct DisasContext {
TCGv_ptr cpu_env;
TCGv *cpu_R;
TCGv_i32 zero;
int is_jmp;
target_ulong pc;
TranslationBlock *tb;
int mem_idx;
bool singlestep_enabled;
} DisasContext;
typedef struct Nios2Instruction {
void (*handler)(DisasContext *dc, uint32_t code, uint32_t flags);
uint32_t flags;
} Nios2Instruction;
static uint8_t get_opcode(uint32_t code)
{
I_TYPE(instr, code);
return instr.op;
}
static uint8_t get_opxcode(uint32_t code)
{
R_TYPE(instr, code);
return instr.opx;
}
static TCGv load_zero(DisasContext *dc)
{
if (TCGV_IS_UNUSED_I32(dc->zero)) {
dc->zero = tcg_const_i32(0);
}
return dc->zero;
}
static TCGv load_gpr(DisasContext *dc, uint8_t reg)
{
if (likely(reg != R_ZERO)) {
return dc->cpu_R[reg];
} else {
return load_zero(dc);
}
}
static void t_gen_helper_raise_exception(DisasContext *dc,
uint32_t index)
{
TCGv_i32 tmp = tcg_const_i32(index);
tcg_gen_movi_tl(dc->cpu_R[R_PC], dc->pc);
gen_helper_raise_exception(dc->cpu_env, tmp);
tcg_temp_free_i32(tmp);
dc->is_jmp = DISAS_UPDATE;
}
static bool use_goto_tb(DisasContext *dc, uint32_t dest)
{
if (unlikely(dc->singlestep_enabled)) {
return false;
}
#ifndef CONFIG_USER_ONLY
return (dc->tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK);
#else
return true;
#endif
}
static void gen_goto_tb(DisasContext *dc, int n, uint32_t dest)
{
TranslationBlock *tb = dc->tb;
if (use_goto_tb(dc, dest)) {
tcg_gen_goto_tb(n);
tcg_gen_movi_tl(dc->cpu_R[R_PC], dest);
tcg_gen_exit_tb((tcg_target_long)tb + n);
} else {
tcg_gen_movi_tl(dc->cpu_R[R_PC], dest);
tcg_gen_exit_tb(0);
}
}
static void gen_excp(DisasContext *dc, uint32_t code, uint32_t flags)
{
t_gen_helper_raise_exception(dc, flags);
}
static void gen_check_supervisor(DisasContext *dc)
{
if (dc->tb->flags & CR_STATUS_U) {
/* CPU in user mode, privileged instruction called, stop. */
t_gen_helper_raise_exception(dc, EXCP_SUPERI);
}
}
/*
* Used as a placeholder for all instructions which do not have
* an effect on the simulator (e.g. flush, sync)
*/
static void nop(DisasContext *dc, uint32_t code, uint32_t flags)
{
/* Nothing to do here */
}
/*
* J-Type instructions
*/
static void jmpi(DisasContext *dc, uint32_t code, uint32_t flags)
{
J_TYPE(instr, code);
gen_goto_tb(dc, 0, (dc->pc & 0xF0000000) | (instr.imm26 << 2));
dc->is_jmp = DISAS_TB_JUMP;
}
static void call(DisasContext *dc, uint32_t code, uint32_t flags)
{
tcg_gen_movi_tl(dc->cpu_R[R_RA], dc->pc + 4);
jmpi(dc, code, flags);
}
/*
* I-Type instructions
*/
/* Load instructions */
static void gen_ldx(DisasContext *dc, uint32_t code, uint32_t flags)
{
I_TYPE(instr, code);
TCGv addr = tcg_temp_new();
TCGv data;
/*
* WARNING: Loads into R_ZERO are ignored, but we must generate the
* memory access itself to emulate the CPU precisely. Load
* from a protected page to R_ZERO will cause SIGSEGV on
* the Nios2 CPU.
*/
if (likely(instr.b != R_ZERO)) {
data = dc->cpu_R[instr.b];
} else {
data = tcg_temp_new();
}
tcg_gen_addi_tl(addr, load_gpr(dc, instr.a), instr.imm16s);
tcg_gen_qemu_ld_tl(data, addr, dc->mem_idx, flags);
if (unlikely(instr.b == R_ZERO)) {
tcg_temp_free(data);
}
tcg_temp_free(addr);
}
/* Store instructions */
static void gen_stx(DisasContext *dc, uint32_t code, uint32_t flags)
{
I_TYPE(instr, code);
TCGv val = load_gpr(dc, instr.b);
TCGv addr = tcg_temp_new();
tcg_gen_addi_tl(addr, load_gpr(dc, instr.a), instr.imm16s);
tcg_gen_qemu_st_tl(val, addr, dc->mem_idx, flags);
tcg_temp_free(addr);
}
/* Branch instructions */
static void br(DisasContext *dc, uint32_t code, uint32_t flags)
{
I_TYPE(instr, code);
gen_goto_tb(dc, 0, dc->pc + 4 + (instr.imm16s & -4));
dc->is_jmp = DISAS_TB_JUMP;
}
static void gen_bxx(DisasContext *dc, uint32_t code, uint32_t flags)
{
I_TYPE(instr, code);
TCGLabel *l1 = gen_new_label();
tcg_gen_brcond_tl(flags, dc->cpu_R[instr.a], dc->cpu_R[instr.b], l1);
gen_goto_tb(dc, 0, dc->pc + 4);
gen_set_label(l1);
gen_goto_tb(dc, 1, dc->pc + 4 + (instr.imm16s & -4));
dc->is_jmp = DISAS_TB_JUMP;
}
/* Comparison instructions */
#define gen_i_cmpxx(fname, op3) \
static void (fname)(DisasContext *dc, uint32_t code, uint32_t flags) \
{ \
I_TYPE(instr, (code)); \
tcg_gen_setcondi_tl(flags, (dc)->cpu_R[instr.b], (dc)->cpu_R[instr.a], \
(op3)); \
}
gen_i_cmpxx(gen_cmpxxsi, instr.imm16s)
gen_i_cmpxx(gen_cmpxxui, instr.imm16)
/* Math/logic instructions */
#define gen_i_math_logic(fname, insn, resimm, op3) \
static void (fname)(DisasContext *dc, uint32_t code, uint32_t flags) \
{ \
I_TYPE(instr, (code)); \
if (unlikely(instr.b == R_ZERO)) { /* Store to R_ZERO is ignored */ \
return; \
} else if (instr.a == R_ZERO) { /* MOVxI optimizations */ \
tcg_gen_movi_tl(dc->cpu_R[instr.b], (resimm) ? (op3) : 0); \
} else { \
tcg_gen_##insn##_tl((dc)->cpu_R[instr.b], (dc)->cpu_R[instr.a], \
(op3)); \
} \
}
gen_i_math_logic(addi, addi, 1, instr.imm16s)
gen_i_math_logic(muli, muli, 0, instr.imm16s)
gen_i_math_logic(andi, andi, 0, instr.imm16)
gen_i_math_logic(ori, ori, 1, instr.imm16)
gen_i_math_logic(xori, xori, 1, instr.imm16)
gen_i_math_logic(andhi, andi, 0, instr.imm16 << 16)
gen_i_math_logic(orhi , ori, 1, instr.imm16 << 16)
gen_i_math_logic(xorhi, xori, 1, instr.imm16 << 16)
/* Prototype only, defined below */
static void handle_r_type_instr(DisasContext *dc, uint32_t code,
uint32_t flags);
static const Nios2Instruction i_type_instructions[] = {
INSTRUCTION(call), /* call */
INSTRUCTION(jmpi), /* jmpi */
INSTRUCTION_ILLEGAL(),
INSTRUCTION_FLG(gen_ldx, MO_UB), /* ldbu */
INSTRUCTION(addi), /* addi */
INSTRUCTION_FLG(gen_stx, MO_UB), /* stb */
INSTRUCTION(br), /* br */
INSTRUCTION_FLG(gen_ldx, MO_SB), /* ldb */
INSTRUCTION_FLG(gen_cmpxxsi, TCG_COND_GE), /* cmpgei */
INSTRUCTION_ILLEGAL(),
INSTRUCTION_ILLEGAL(),
INSTRUCTION_FLG(gen_ldx, MO_UW), /* ldhu */
INSTRUCTION(andi), /* andi */
INSTRUCTION_FLG(gen_stx, MO_UW), /* sth */
INSTRUCTION_FLG(gen_bxx, TCG_COND_GE), /* bge */
INSTRUCTION_FLG(gen_ldx, MO_SW), /* ldh */
INSTRUCTION_FLG(gen_cmpxxsi, TCG_COND_LT), /* cmplti */
INSTRUCTION_ILLEGAL(),
INSTRUCTION_ILLEGAL(),
INSTRUCTION_NOP(), /* initda */
INSTRUCTION(ori), /* ori */
INSTRUCTION_FLG(gen_stx, MO_UL), /* stw */
INSTRUCTION_FLG(gen_bxx, TCG_COND_LT), /* blt */
INSTRUCTION_FLG(gen_ldx, MO_UL), /* ldw */
INSTRUCTION_FLG(gen_cmpxxsi, TCG_COND_NE), /* cmpnei */
INSTRUCTION_ILLEGAL(),
INSTRUCTION_ILLEGAL(),
INSTRUCTION_NOP(), /* flushda */
INSTRUCTION(xori), /* xori */
INSTRUCTION_ILLEGAL(),
INSTRUCTION_FLG(gen_bxx, TCG_COND_NE), /* bne */
INSTRUCTION_ILLEGAL(),
INSTRUCTION_FLG(gen_cmpxxsi, TCG_COND_EQ), /* cmpeqi */
INSTRUCTION_ILLEGAL(),
INSTRUCTION_ILLEGAL(),
INSTRUCTION_FLG(gen_ldx, MO_UB), /* ldbuio */
INSTRUCTION(muli), /* muli */
INSTRUCTION_FLG(gen_stx, MO_UB), /* stbio */
INSTRUCTION_FLG(gen_bxx, TCG_COND_EQ), /* beq */
INSTRUCTION_FLG(gen_ldx, MO_SB), /* ldbio */
INSTRUCTION_FLG(gen_cmpxxui, TCG_COND_GEU), /* cmpgeui */
INSTRUCTION_ILLEGAL(),
INSTRUCTION_ILLEGAL(),
INSTRUCTION_FLG(gen_ldx, MO_UW), /* ldhuio */
INSTRUCTION(andhi), /* andhi */
INSTRUCTION_FLG(gen_stx, MO_UW), /* sthio */
INSTRUCTION_FLG(gen_bxx, TCG_COND_GEU), /* bgeu */
INSTRUCTION_FLG(gen_ldx, MO_SW), /* ldhio */
INSTRUCTION_FLG(gen_cmpxxui, TCG_COND_LTU), /* cmpltui */
INSTRUCTION_ILLEGAL(),
INSTRUCTION_UNIMPLEMENTED(), /* custom */
INSTRUCTION_NOP(), /* initd */
INSTRUCTION(orhi), /* orhi */
INSTRUCTION_FLG(gen_stx, MO_SL), /* stwio */
INSTRUCTION_FLG(gen_bxx, TCG_COND_LTU), /* bltu */
INSTRUCTION_FLG(gen_ldx, MO_UL), /* ldwio */
INSTRUCTION_UNIMPLEMENTED(), /* rdprs */
INSTRUCTION_ILLEGAL(),
INSTRUCTION_FLG(handle_r_type_instr, 0), /* R-Type */
INSTRUCTION_NOP(), /* flushd */
INSTRUCTION(xorhi), /* xorhi */
INSTRUCTION_ILLEGAL(),
INSTRUCTION_ILLEGAL(),
INSTRUCTION_ILLEGAL(),
};
/*
* R-Type instructions
*/
/*
* status <- estatus
* PC <- ea
*/
static void eret(DisasContext *dc, uint32_t code, uint32_t flags)
{
tcg_gen_mov_tl(dc->cpu_R[CR_STATUS], dc->cpu_R[CR_ESTATUS]);
tcg_gen_mov_tl(dc->cpu_R[R_PC], dc->cpu_R[R_EA]);
dc->is_jmp = DISAS_JUMP;
}
/* PC <- ra */
static void ret(DisasContext *dc, uint32_t code, uint32_t flags)
{
tcg_gen_mov_tl(dc->cpu_R[R_PC], dc->cpu_R[R_RA]);
dc->is_jmp = DISAS_JUMP;
}
/* PC <- ba */
static void bret(DisasContext *dc, uint32_t code, uint32_t flags)
{
tcg_gen_mov_tl(dc->cpu_R[R_PC], dc->cpu_R[R_BA]);
dc->is_jmp = DISAS_JUMP;
}
/* PC <- rA */
static void jmp(DisasContext *dc, uint32_t code, uint32_t flags)
{
R_TYPE(instr, code);
tcg_gen_mov_tl(dc->cpu_R[R_PC], load_gpr(dc, instr.a));
dc->is_jmp = DISAS_JUMP;
}
/* rC <- PC + 4 */
static void nextpc(DisasContext *dc, uint32_t code, uint32_t flags)
{
R_TYPE(instr, code);
if (likely(instr.c != R_ZERO)) {
tcg_gen_movi_tl(dc->cpu_R[instr.c], dc->pc + 4);
}
}
/*
* ra <- PC + 4
* PC <- rA
*/
static void callr(DisasContext *dc, uint32_t code, uint32_t flags)
{
R_TYPE(instr, code);
tcg_gen_mov_tl(dc->cpu_R[R_PC], load_gpr(dc, instr.a));
tcg_gen_movi_tl(dc->cpu_R[R_RA], dc->pc + 4);
dc->is_jmp = DISAS_JUMP;
}
/* rC <- ctlN */
static void rdctl(DisasContext *dc, uint32_t code, uint32_t flags)
{
R_TYPE(instr, code);
gen_check_supervisor(dc);
switch (instr.imm5 + CR_BASE) {
case CR_PTEADDR:
case CR_TLBACC:
case CR_TLBMISC:
{
#if !defined(CONFIG_USER_ONLY)
if (likely(instr.c != R_ZERO)) {
tcg_gen_mov_tl(dc->cpu_R[instr.c], dc->cpu_R[instr.imm5 + CR_BASE]);
#ifdef DEBUG_MMU
TCGv_i32 tmp = tcg_const_i32(instr.imm5 + CR_BASE);
gen_helper_mmu_read_debug(dc->cpu_R[instr.c], dc->cpu_env, tmp);
tcg_temp_free_i32(tmp);
#endif
}
#endif
break;
}
default:
if (likely(instr.c != R_ZERO)) {
tcg_gen_mov_tl(dc->cpu_R[instr.c], dc->cpu_R[instr.imm5 + CR_BASE]);
}
break;
}
}
/* ctlN <- rA */
static void wrctl(DisasContext *dc, uint32_t code, uint32_t flags)
{
R_TYPE(instr, code);
gen_check_supervisor(dc);
switch (instr.imm5 + CR_BASE) {
case CR_PTEADDR:
case CR_TLBACC:
case CR_TLBMISC:
{
#if !defined(CONFIG_USER_ONLY)
TCGv_i32 tmp = tcg_const_i32(instr.imm5 + CR_BASE);
gen_helper_mmu_write(dc->cpu_env, tmp, load_gpr(dc, instr.a));
tcg_temp_free_i32(tmp);
#endif
break;
}
default:
tcg_gen_mov_tl(dc->cpu_R[instr.imm5 + CR_BASE], load_gpr(dc, instr.a));
break;
}
/* If interrupts were enabled using WRCTL, trigger them. */
#if !defined(CONFIG_USER_ONLY)
if ((instr.imm5 + CR_BASE) == CR_STATUS) {
gen_helper_check_interrupts(dc->cpu_env);
}
#endif
}
/* Comparison instructions */
static void gen_cmpxx(DisasContext *dc, uint32_t code, uint32_t flags)
{
R_TYPE(instr, code);
if (likely(instr.c != R_ZERO)) {
tcg_gen_setcond_tl(flags, dc->cpu_R[instr.c], dc->cpu_R[instr.a],
dc->cpu_R[instr.b]);
}
}
/* Math/logic instructions */
#define gen_r_math_logic(fname, insn, op3) \
static void (fname)(DisasContext *dc, uint32_t code, uint32_t flags) \
{ \
R_TYPE(instr, (code)); \
if (likely(instr.c != R_ZERO)) { \
tcg_gen_##insn((dc)->cpu_R[instr.c], load_gpr((dc), instr.a), \
(op3)); \
} \
}
gen_r_math_logic(add, add_tl, load_gpr(dc, instr.b))
gen_r_math_logic(sub, sub_tl, load_gpr(dc, instr.b))
gen_r_math_logic(mul, mul_tl, load_gpr(dc, instr.b))
gen_r_math_logic(and, and_tl, load_gpr(dc, instr.b))
gen_r_math_logic(or, or_tl, load_gpr(dc, instr.b))
gen_r_math_logic(xor, xor_tl, load_gpr(dc, instr.b))
gen_r_math_logic(nor, nor_tl, load_gpr(dc, instr.b))
gen_r_math_logic(srai, sari_tl, instr.imm5)
gen_r_math_logic(srli, shri_tl, instr.imm5)
gen_r_math_logic(slli, shli_tl, instr.imm5)
gen_r_math_logic(roli, rotli_tl, instr.imm5)
#define gen_r_mul(fname, insn) \
static void (fname)(DisasContext *dc, uint32_t code, uint32_t flags) \
{ \
R_TYPE(instr, (code)); \
if (likely(instr.c != R_ZERO)) { \
TCGv t0 = tcg_temp_new(); \
tcg_gen_##insn(t0, dc->cpu_R[instr.c], \
load_gpr(dc, instr.a), load_gpr(dc, instr.b)); \
tcg_temp_free(t0); \
} \
}
gen_r_mul(mulxss, muls2_tl)
gen_r_mul(mulxuu, mulu2_tl)
gen_r_mul(mulxsu, mulsu2_tl)
#define gen_r_shift_s(fname, insn) \
static void (fname)(DisasContext *dc, uint32_t code, uint32_t flags) \
{ \
R_TYPE(instr, (code)); \
if (likely(instr.c != R_ZERO)) { \
TCGv t0 = tcg_temp_new(); \
tcg_gen_andi_tl(t0, load_gpr((dc), instr.b), 31); \
tcg_gen_##insn((dc)->cpu_R[instr.c], load_gpr((dc), instr.a), t0); \
tcg_temp_free(t0); \
} \
}
gen_r_shift_s(sra, sar_tl)
gen_r_shift_s(srl, shr_tl)
gen_r_shift_s(sll, shl_tl)
gen_r_shift_s(rol, rotl_tl)
gen_r_shift_s(ror, rotr_tl)
static void divs(DisasContext *dc, uint32_t code, uint32_t flags)
{
R_TYPE(instr, (code));
/* Stores into R_ZERO are ignored */
if (unlikely(instr.c == R_ZERO)) {
return;
}
TCGv t0 = tcg_temp_new();
TCGv t1 = tcg_temp_new();
TCGv t2 = tcg_temp_new();
TCGv t3 = tcg_temp_new();
tcg_gen_ext32s_tl(t0, load_gpr(dc, instr.a));
tcg_gen_ext32s_tl(t1, load_gpr(dc, instr.b));
tcg_gen_setcondi_tl(TCG_COND_EQ, t2, t0, INT_MIN);
tcg_gen_setcondi_tl(TCG_COND_EQ, t3, t1, -1);
tcg_gen_and_tl(t2, t2, t3);
tcg_gen_setcondi_tl(TCG_COND_EQ, t3, t1, 0);
tcg_gen_or_tl(t2, t2, t3);
tcg_gen_movi_tl(t3, 0);
tcg_gen_movcond_tl(TCG_COND_NE, t1, t2, t3, t2, t1);
tcg_gen_div_tl(dc->cpu_R[instr.c], t0, t1);
tcg_gen_ext32s_tl(dc->cpu_R[instr.c], dc->cpu_R[instr.c]);
tcg_temp_free(t3);
tcg_temp_free(t2);
tcg_temp_free(t1);
tcg_temp_free(t0);
}
static void divu(DisasContext *dc, uint32_t code, uint32_t flags)
{
R_TYPE(instr, (code));
/* Stores into R_ZERO are ignored */
if (unlikely(instr.c == R_ZERO)) {
return;
}
TCGv t0 = tcg_temp_new();
TCGv t1 = tcg_temp_new();
TCGv t2 = tcg_const_tl(0);
TCGv t3 = tcg_const_tl(1);
tcg_gen_ext32u_tl(t0, load_gpr(dc, instr.a));
tcg_gen_ext32u_tl(t1, load_gpr(dc, instr.b));
tcg_gen_movcond_tl(TCG_COND_EQ, t1, t1, t2, t3, t1);
tcg_gen_divu_tl(dc->cpu_R[instr.c], t0, t1);
tcg_gen_ext32s_tl(dc->cpu_R[instr.c], dc->cpu_R[instr.c]);
tcg_temp_free(t3);
tcg_temp_free(t2);
tcg_temp_free(t1);
tcg_temp_free(t0);
}
static const Nios2Instruction r_type_instructions[] = {
INSTRUCTION_ILLEGAL(),
INSTRUCTION(eret), /* eret */
INSTRUCTION(roli), /* roli */
INSTRUCTION(rol), /* rol */
INSTRUCTION_NOP(), /* flushp */
INSTRUCTION(ret), /* ret */
INSTRUCTION(nor), /* nor */
INSTRUCTION(mulxuu), /* mulxuu */
INSTRUCTION_FLG(gen_cmpxx, TCG_COND_GE), /* cmpge */
INSTRUCTION(bret), /* bret */
INSTRUCTION_ILLEGAL(),
INSTRUCTION(ror), /* ror */
INSTRUCTION_NOP(), /* flushi */
INSTRUCTION(jmp), /* jmp */
INSTRUCTION(and), /* and */
INSTRUCTION_ILLEGAL(),
INSTRUCTION_FLG(gen_cmpxx, TCG_COND_LT), /* cmplt */
INSTRUCTION_ILLEGAL(),
INSTRUCTION(slli), /* slli */
INSTRUCTION(sll), /* sll */
INSTRUCTION_UNIMPLEMENTED(), /* wrprs */
INSTRUCTION_ILLEGAL(),
INSTRUCTION(or), /* or */
INSTRUCTION(mulxsu), /* mulxsu */
INSTRUCTION_FLG(gen_cmpxx, TCG_COND_NE), /* cmpne */
INSTRUCTION_ILLEGAL(),
INSTRUCTION(srli), /* srli */
INSTRUCTION(srl), /* srl */
INSTRUCTION(nextpc), /* nextpc */
INSTRUCTION(callr), /* callr */
INSTRUCTION(xor), /* xor */
INSTRUCTION(mulxss), /* mulxss */
INSTRUCTION_FLG(gen_cmpxx, TCG_COND_EQ), /* cmpeq */
INSTRUCTION_ILLEGAL(),
INSTRUCTION_ILLEGAL(),
INSTRUCTION_ILLEGAL(),
INSTRUCTION(divu), /* divu */
INSTRUCTION(divs), /* div */
INSTRUCTION(rdctl), /* rdctl */
INSTRUCTION(mul), /* mul */
INSTRUCTION_FLG(gen_cmpxx, TCG_COND_GEU), /* cmpgeu */
INSTRUCTION_NOP(), /* initi */
INSTRUCTION_ILLEGAL(),
INSTRUCTION_ILLEGAL(),
INSTRUCTION_ILLEGAL(),
INSTRUCTION_FLG(gen_excp, EXCP_TRAP), /* trap */
INSTRUCTION(wrctl), /* wrctl */
INSTRUCTION_ILLEGAL(),
INSTRUCTION_FLG(gen_cmpxx, TCG_COND_LTU), /* cmpltu */
INSTRUCTION(add), /* add */
INSTRUCTION_ILLEGAL(),
INSTRUCTION_ILLEGAL(),
INSTRUCTION_FLG(gen_excp, EXCP_BREAK), /* break */
INSTRUCTION_ILLEGAL(),
INSTRUCTION(nop), /* nop */
INSTRUCTION_ILLEGAL(),
INSTRUCTION_ILLEGAL(),
INSTRUCTION(sub), /* sub */
INSTRUCTION(srai), /* srai */
INSTRUCTION(sra), /* sra */
INSTRUCTION_ILLEGAL(),
INSTRUCTION_ILLEGAL(),
INSTRUCTION_ILLEGAL(),
INSTRUCTION_ILLEGAL(),
};
static void handle_r_type_instr(DisasContext *dc, uint32_t code, uint32_t flags)
{
uint8_t opx;
const Nios2Instruction *instr;
opx = get_opxcode(code);
if (unlikely(opx >= ARRAY_SIZE(r_type_instructions))) {
goto illegal_op;
}
instr = &r_type_instructions[opx];
instr->handler(dc, code, instr->flags);
return;
illegal_op:
t_gen_helper_raise_exception(dc, EXCP_ILLEGAL);
}
static void handle_instruction(DisasContext *dc, CPUNios2State *env)
{
uint32_t code;
uint8_t op;
const Nios2Instruction *instr;
#if defined(CONFIG_USER_ONLY)
/* FIXME: Is this needed ? */
if (dc->pc >= 0x1000 && dc->pc < 0x2000) {
env->regs[R_PC] = dc->pc;
t_gen_helper_raise_exception(dc, 0xaa);
return;
}
#endif
code = cpu_ldl_code(env, dc->pc);
op = get_opcode(code);
if (unlikely(op >= ARRAY_SIZE(i_type_instructions))) {
goto illegal_op;
}
TCGV_UNUSED_I32(dc->zero);
instr = &i_type_instructions[op];
instr->handler(dc, code, instr->flags);
if (!TCGV_IS_UNUSED_I32(dc->zero)) {
tcg_temp_free(dc->zero);
}
return;
illegal_op:
t_gen_helper_raise_exception(dc, EXCP_ILLEGAL);
}
static const char * const regnames[] = {
"zero", "at", "r2", "r3",
"r4", "r5", "r6", "r7",
"r8", "r9", "r10", "r11",
"r12", "r13", "r14", "r15",
"r16", "r17", "r18", "r19",
"r20", "r21", "r22", "r23",
"et", "bt", "gp", "sp",
"fp", "ea", "ba", "ra",
"status", "estatus", "bstatus", "ienable",
"ipending", "cpuid", "reserved0", "exception",
"pteaddr", "tlbacc", "tlbmisc", "reserved1",
"badaddr", "config", "mpubase", "mpuacc",
"reserved2", "reserved3", "reserved4", "reserved5",
"reserved6", "reserved7", "reserved8", "reserved9",
"reserved10", "reserved11", "reserved12", "reserved13",
"reserved14", "reserved15", "reserved16", "reserved17",
"rpc"
};
static TCGv_ptr cpu_env;
static TCGv cpu_R[NUM_CORE_REGS];
#include "exec/gen-icount.h"
static void gen_exception(DisasContext *dc, uint32_t excp)
{
TCGv_i32 tmp = tcg_const_i32(excp);
tcg_gen_movi_tl(cpu_R[R_PC], dc->pc);
gen_helper_raise_exception(cpu_env, tmp);
tcg_temp_free_i32(tmp);
dc->is_jmp = DISAS_UPDATE;
}
/* generate intermediate code for basic block 'tb'. */
void gen_intermediate_code(CPUNios2State *env, TranslationBlock *tb)
{
Nios2CPU *cpu = nios2_env_get_cpu(env);
CPUState *cs = CPU(cpu);
DisasContext dc1, *dc = &dc1;
int num_insns;
int max_insns;
/* Initialize DC */
dc->cpu_env = cpu_env;
dc->cpu_R = cpu_R;
dc->is_jmp = DISAS_NEXT;
dc->pc = tb->pc;
dc->tb = tb;
dc->mem_idx = cpu_mmu_index(env, false);
dc->singlestep_enabled = cs->singlestep_enabled;
/* Set up instruction counts */
num_insns = 0;
if (cs->singlestep_enabled || singlestep) {
max_insns = 1;
} else {
int page_insns = (TARGET_PAGE_SIZE - (tb->pc & TARGET_PAGE_MASK)) / 4;
max_insns = tb->cflags & CF_COUNT_MASK;
if (max_insns == 0) {
max_insns = CF_COUNT_MASK;
}
if (max_insns > page_insns) {
max_insns = page_insns;
}
if (max_insns > TCG_MAX_INSNS) {
max_insns = TCG_MAX_INSNS;
}
}
gen_tb_start(tb);
do {
tcg_gen_insn_start(dc->pc);
num_insns++;
if (unlikely(cpu_breakpoint_test(cs, dc->pc, BP_ANY))) {
gen_exception(dc, EXCP_DEBUG);
/* The address covered by the breakpoint must be included in
[tb->pc, tb->pc + tb->size) in order to for it to be
properly cleared -- thus we increment the PC here so that
the logic setting tb->size below does the right thing. */
dc->pc += 4;
break;
}
if (num_insns == max_insns && (tb->cflags & CF_LAST_IO)) {
gen_io_start();
}
/* Decode an instruction */
handle_instruction(dc, env);
dc->pc += 4;
/* Translation stops when a conditional branch is encountered.
* Otherwise the subsequent code could get translated several times.
* Also stop translation when a page boundary is reached. This
* ensures prefetch aborts occur at the right place. */
} while (!dc->is_jmp &&
!tcg_op_buf_full() &&
num_insns < max_insns);
if (tb->cflags & CF_LAST_IO) {
gen_io_end();
}
/* Indicate where the next block should start */
switch (dc->is_jmp) {
case DISAS_NEXT:
/* Save the current PC back into the CPU register */
tcg_gen_movi_tl(cpu_R[R_PC], dc->pc);
tcg_gen_exit_tb(0);
break;
default:
case DISAS_JUMP:
case DISAS_UPDATE:
/* The jump will already have updated the PC register */
tcg_gen_exit_tb(0);
break;
case DISAS_TB_JUMP:
/* nothing more to generate */
break;
}
/* End off the block */
gen_tb_end(tb, num_insns);
/* Mark instruction starts for the final generated instruction */
tb->size = dc->pc - tb->pc;
tb->icount = num_insns;
#ifdef DEBUG_DISAS
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)
&& qemu_log_in_addr_range(tb->pc)) {
qemu_log_lock();
qemu_log("IN: %s\n", lookup_symbol(tb->pc));
log_target_disas(cs, tb->pc, dc->pc - tb->pc, 0);
qemu_log("\n");
qemu_log_unlock();
}
#endif
}
void nios2_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf,
int flags)
{
Nios2CPU *cpu = NIOS2_CPU(cs);
CPUNios2State *env = &cpu->env;
int i;
if (!env || !f) {
return;
}
cpu_fprintf(f, "IN: PC=%x %s\n",
env->regs[R_PC], lookup_symbol(env->regs[R_PC]));
for (i = 0; i < NUM_CORE_REGS; i++) {
cpu_fprintf(f, "%9s=%8.8x ", regnames[i], env->regs[i]);
if ((i + 1) % 4 == 0) {
cpu_fprintf(f, "\n");
}
}
#if !defined(CONFIG_USER_ONLY)
cpu_fprintf(f, " mmu write: VPN=%05X PID %02X TLBACC %08X\n",
env->mmu.pteaddr_wr & CR_PTEADDR_VPN_MASK,
(env->mmu.tlbmisc_wr & CR_TLBMISC_PID_MASK) >> 4,
env->mmu.tlbacc_wr);
#endif
cpu_fprintf(f, "\n\n");
}
void nios2_tcg_init(void)
{
int i;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
for (i = 0; i < NUM_CORE_REGS; i++) {
cpu_R[i] = tcg_global_mem_new(cpu_env,
offsetof(CPUNios2State, regs[i]),
regnames[i]);
}
}
void restore_state_to_opc(CPUNios2State *env, TranslationBlock *tb,
target_ulong *data)
{
env->regs[R_PC] = data[0];
}