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qemu/hw/ppc/prep.c
Nicholas Piggin 30d0647bcf hw/ppc: Reset timebase facilities on machine reset 
Lower interrupts, delete timers, and set time facility registers
back to initial state on machine reset.

This is not so important for record-replay since timebase and
decrementer are migrated, but it gives a cleaner reset state.

Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Cc: BALATON Zoltan <balaton@eik.bme.hu>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[ clg: checkpatch.pl fixes ]
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2023-09-06 11:19:33 +02:00

431 lines
14 KiB
C
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/*
* QEMU PPC PREP hardware System Emulator
*
* Copyright (c) 2003-2007 Jocelyn Mayer
* Copyright (c) 2017 Hervé Poussineau
*
* 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 "hw/rtc/m48t59.h"
#include "hw/char/serial.h"
#include "hw/block/fdc.h"
#include "net/net.h"
#include "hw/isa/isa.h"
#include "hw/pci/pci.h"
#include "hw/pci/pci_host.h"
#include "hw/ppc/ppc.h"
#include "hw/boards.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "qemu/log.h"
#include "hw/loader.h"
#include "hw/rtc/mc146818rtc.h"
#include "hw/isa/pc87312.h"
#include "hw/qdev-properties.h"
#include "sysemu/kvm.h"
#include "sysemu/reset.h"
#include "trace.h"
#include "elf.h"
#include "qemu/units.h"
/* SMP is not enabled, for now */
#define MAX_CPUS 1
#define CFG_ADDR 0xf0000510
#define KERNEL_LOAD_ADDR 0x01000000
#define INITRD_LOAD_ADDR 0x01800000
#define NVRAM_SIZE 0x2000
static void fw_cfg_boot_set(void *opaque, const char *boot_device,
Error **errp)
{
fw_cfg_modify_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]);
}
static void ppc_prep_reset(void *opaque)
{
PowerPCCPU *cpu = opaque;
cpu_reset(CPU(cpu));
cpu_ppc_tb_reset(&cpu->env);
}
/*****************************************************************************/
/* NVRAM helpers */
static inline uint32_t nvram_read(Nvram *nvram, uint32_t addr)
{
NvramClass *k = NVRAM_GET_CLASS(nvram);
return (k->read)(nvram, addr);
}
static inline void nvram_write(Nvram *nvram, uint32_t addr, uint32_t val)
{
NvramClass *k = NVRAM_GET_CLASS(nvram);
(k->write)(nvram, addr, val);
}
static void NVRAM_set_byte(Nvram *nvram, uint32_t addr, uint8_t value)
{
nvram_write(nvram, addr, value);
}
static uint8_t NVRAM_get_byte(Nvram *nvram, uint32_t addr)
{
return nvram_read(nvram, addr);
}
static void NVRAM_set_word(Nvram *nvram, uint32_t addr, uint16_t value)
{
nvram_write(nvram, addr, value >> 8);
nvram_write(nvram, addr + 1, value & 0xFF);
}
static uint16_t NVRAM_get_word(Nvram *nvram, uint32_t addr)
{
uint16_t tmp;
tmp = nvram_read(nvram, addr) << 8;
tmp |= nvram_read(nvram, addr + 1);
return tmp;
}
static void NVRAM_set_lword(Nvram *nvram, uint32_t addr, uint32_t value)
{
nvram_write(nvram, addr, value >> 24);
nvram_write(nvram, addr + 1, (value >> 16) & 0xFF);
nvram_write(nvram, addr + 2, (value >> 8) & 0xFF);
nvram_write(nvram, addr + 3, value & 0xFF);
}
static void NVRAM_set_string(Nvram *nvram, uint32_t addr, const char *str,
uint32_t max)
{
int i;
for (i = 0; i < max && str[i] != '\0'; i++) {
nvram_write(nvram, addr + i, str[i]);
}
nvram_write(nvram, addr + i, str[i]);
nvram_write(nvram, addr + max - 1, '\0');
}
static uint16_t NVRAM_crc_update (uint16_t prev, uint16_t value)
{
uint16_t tmp;
uint16_t pd, pd1, pd2;
tmp = prev >> 8;
pd = prev ^ value;
pd1 = pd & 0x000F;
pd2 = ((pd >> 4) & 0x000F) ^ pd1;
tmp ^= (pd1 << 3) | (pd1 << 8);
tmp ^= pd2 | (pd2 << 7) | (pd2 << 12);
return tmp;
}
static uint16_t NVRAM_compute_crc (Nvram *nvram, uint32_t start, uint32_t count)
{
uint32_t i;
uint16_t crc = 0xFFFF;
int odd;
odd = count & 1;
count &= ~1;
for (i = 0; i != count; i++) {
crc = NVRAM_crc_update(crc, NVRAM_get_word(nvram, start + i));
}
if (odd) {
crc = NVRAM_crc_update(crc, NVRAM_get_byte(nvram, start + i) << 8);
}
return crc;
}
#define CMDLINE_ADDR 0x017ff000
static int PPC_NVRAM_set_params (Nvram *nvram, uint16_t NVRAM_size,
const char *arch,
uint32_t RAM_size, int boot_device,
uint32_t kernel_image, uint32_t kernel_size,
const char *cmdline,
uint32_t initrd_image, uint32_t initrd_size,
uint32_t NVRAM_image,
int width, int height, int depth)
{
uint16_t crc;
/* Set parameters for Open Hack'Ware BIOS */
NVRAM_set_string(nvram, 0x00, "QEMU_BIOS", 16);
NVRAM_set_lword(nvram, 0x10, 0x00000002); /* structure v2 */
NVRAM_set_word(nvram, 0x14, NVRAM_size);
NVRAM_set_string(nvram, 0x20, arch, 16);
NVRAM_set_lword(nvram, 0x30, RAM_size);
NVRAM_set_byte(nvram, 0x34, boot_device);
NVRAM_set_lword(nvram, 0x38, kernel_image);
NVRAM_set_lword(nvram, 0x3C, kernel_size);
if (cmdline) {
/* XXX: put the cmdline in NVRAM too ? */
pstrcpy_targphys("cmdline", CMDLINE_ADDR, RAM_size - CMDLINE_ADDR,
cmdline);
NVRAM_set_lword(nvram, 0x40, CMDLINE_ADDR);
NVRAM_set_lword(nvram, 0x44, strlen(cmdline));
} else {
NVRAM_set_lword(nvram, 0x40, 0);
NVRAM_set_lword(nvram, 0x44, 0);
}
NVRAM_set_lword(nvram, 0x48, initrd_image);
NVRAM_set_lword(nvram, 0x4C, initrd_size);
NVRAM_set_lword(nvram, 0x50, NVRAM_image);
NVRAM_set_word(nvram, 0x54, width);
NVRAM_set_word(nvram, 0x56, height);
NVRAM_set_word(nvram, 0x58, depth);
crc = NVRAM_compute_crc(nvram, 0x00, 0xF8);
NVRAM_set_word(nvram, 0xFC, crc);
return 0;
}
static int prep_set_cmos_checksum(DeviceState *dev, void *opaque)
{
uint16_t checksum = *(uint16_t *)opaque;
if (object_dynamic_cast(OBJECT(dev), TYPE_MC146818_RTC)) {
MC146818RtcState *rtc = MC146818_RTC(dev);
mc146818rtc_set_cmos_data(rtc, 0x2e, checksum & 0xff);
mc146818rtc_set_cmos_data(rtc, 0x3e, checksum & 0xff);
mc146818rtc_set_cmos_data(rtc, 0x2f, checksum >> 8);
mc146818rtc_set_cmos_data(rtc, 0x3f, checksum >> 8);
object_property_add_alias(qdev_get_machine(), "rtc-time", OBJECT(rtc),
"date");
}
return 0;
}
static void ibm_40p_init(MachineState *machine)
{
const char *bios_name = machine->firmware ?: "openbios-ppc";
MachineClass *mc = MACHINE_GET_CLASS(machine);
CPUPPCState *env = NULL;
uint16_t cmos_checksum;
PowerPCCPU *cpu;
DeviceState *dev, *i82378_dev;
SysBusDevice *pcihost, *s;
Nvram *m48t59 = NULL;
PCIBus *pci_bus;
ISADevice *isa_dev;
ISABus *isa_bus;
void *fw_cfg;
int i;
uint32_t kernel_base = 0, initrd_base = 0;
long kernel_size = 0, initrd_size = 0;
char boot_device;
if (kvm_enabled()) {
error_report("machine %s does not support the KVM accelerator",
MACHINE_GET_CLASS(machine)->name);
exit(EXIT_FAILURE);
}
/* init CPU */
cpu = POWERPC_CPU(cpu_create(machine->cpu_type));
env = &cpu->env;
if (PPC_INPUT(env) != PPC_FLAGS_INPUT_6xx) {
error_report("only 6xx bus is supported on this machine");
exit(1);
}
/* Set time-base frequency to 100 Mhz */
cpu_ppc_tb_init(env, 100UL * 1000UL * 1000UL);
qemu_register_reset(ppc_prep_reset, cpu);
/* PCI host */
dev = qdev_new("raven-pcihost");
qdev_prop_set_string(dev, "bios-name", bios_name);
qdev_prop_set_uint32(dev, "elf-machine", PPC_ELF_MACHINE);
pcihost = SYS_BUS_DEVICE(dev);
object_property_add_child(qdev_get_machine(), "raven", OBJECT(dev));
sysbus_realize_and_unref(pcihost, &error_fatal);
pci_bus = PCI_BUS(qdev_get_child_bus(dev, "pci.0"));
if (!pci_bus) {
error_report("could not create PCI host controller");
exit(1);
}
/* PCI -> ISA bridge */
i82378_dev = DEVICE(pci_new(PCI_DEVFN(11, 0), "i82378"));
qdev_connect_gpio_out(i82378_dev, 0,
qdev_get_gpio_in(DEVICE(cpu), PPC6xx_INPUT_INT));
qdev_realize_and_unref(i82378_dev, BUS(pci_bus), &error_fatal);
sysbus_connect_irq(pcihost, 0, qdev_get_gpio_in(i82378_dev, 15));
isa_bus = ISA_BUS(qdev_get_child_bus(i82378_dev, "isa.0"));
/* Memory controller */
isa_dev = isa_new("rs6000-mc");
dev = DEVICE(isa_dev);
qdev_prop_set_uint32(dev, "ram-size", machine->ram_size);
isa_realize_and_unref(isa_dev, isa_bus, &error_fatal);
/* RTC */
isa_dev = isa_new(TYPE_MC146818_RTC);
dev = DEVICE(isa_dev);
qdev_prop_set_int32(dev, "base_year", 1900);
isa_realize_and_unref(isa_dev, isa_bus, &error_fatal);
/* initialize CMOS checksums */
cmos_checksum = 0x6aa9;
qbus_walk_children(BUS(isa_bus), prep_set_cmos_checksum, NULL, NULL, NULL,
&cmos_checksum);
/* add some more devices */
if (defaults_enabled()) {
m48t59 = NVRAM(isa_create_simple(isa_bus, "isa-m48t59"));
isa_dev = isa_new("cs4231a");
dev = DEVICE(isa_dev);
qdev_prop_set_uint32(dev, "iobase", 0x830);
qdev_prop_set_uint32(dev, "irq", 10);
isa_realize_and_unref(isa_dev, isa_bus, &error_fatal);
isa_dev = isa_new("pc87312");
dev = DEVICE(isa_dev);
qdev_prop_set_uint32(dev, "config", 12);
isa_realize_and_unref(isa_dev, isa_bus, &error_fatal);
isa_dev = isa_new("prep-systemio");
dev = DEVICE(isa_dev);
qdev_prop_set_uint32(dev, "ibm-planar-id", 0xfc);
qdev_prop_set_uint32(dev, "equipment", 0xc0);
isa_realize_and_unref(isa_dev, isa_bus, &error_fatal);
dev = DEVICE(pci_create_simple(pci_bus, PCI_DEVFN(1, 0),
"lsi53c810"));
lsi53c8xx_handle_legacy_cmdline(dev);
qdev_connect_gpio_out(dev, 0, qdev_get_gpio_in(i82378_dev, 13));
/* XXX: s3-trio at PCI_DEVFN(2, 0) */
pci_vga_init(pci_bus);
for (i = 0; i < nb_nics; i++) {
pci_nic_init_nofail(&nd_table[i], pci_bus, mc->default_nic,
i == 0 ? "3" : NULL);
}
}
/* Prepare firmware configuration for OpenBIOS */
dev = qdev_new(TYPE_FW_CFG_MEM);
fw_cfg = FW_CFG(dev);
qdev_prop_set_uint32(dev, "data_width", 1);
qdev_prop_set_bit(dev, "dma_enabled", false);
object_property_add_child(OBJECT(qdev_get_machine()), TYPE_FW_CFG,
OBJECT(fw_cfg));
s = SYS_BUS_DEVICE(dev);
sysbus_realize_and_unref(s, &error_fatal);
sysbus_mmio_map(s, 0, CFG_ADDR);
sysbus_mmio_map(s, 1, CFG_ADDR + 2);
if (machine->kernel_filename) {
/* load kernel */
kernel_base = KERNEL_LOAD_ADDR;
kernel_size = load_image_targphys(machine->kernel_filename,
kernel_base,
machine->ram_size - kernel_base);
if (kernel_size < 0) {
error_report("could not load kernel '%s'",
machine->kernel_filename);
exit(1);
}
fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, kernel_base);
fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_SIZE, kernel_size);
/* load initrd */
if (machine->initrd_filename) {
initrd_base = INITRD_LOAD_ADDR;
initrd_size = load_image_targphys(machine->initrd_filename,
initrd_base,
machine->ram_size - initrd_base);
if (initrd_size < 0) {
error_report("could not load initial ram disk '%s'",
machine->initrd_filename);
exit(1);
}
fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_ADDR, initrd_base);
fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_SIZE, initrd_size);
}
if (machine->kernel_cmdline && *machine->kernel_cmdline) {
fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_CMDLINE, CMDLINE_ADDR);
pstrcpy_targphys("cmdline", CMDLINE_ADDR, TARGET_PAGE_SIZE,
machine->kernel_cmdline);
fw_cfg_add_string(fw_cfg, FW_CFG_CMDLINE_DATA,
machine->kernel_cmdline);
fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_SIZE,
strlen(machine->kernel_cmdline) + 1);
}
boot_device = 'm';
} else {
boot_device = machine->boot_config.order[0];
}
fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)machine->smp.max_cpus);
fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)machine->ram_size);
fw_cfg_add_i16(fw_cfg, FW_CFG_MACHINE_ID, ARCH_PREP);
fw_cfg_add_i16(fw_cfg, FW_CFG_PPC_WIDTH, graphic_width);
fw_cfg_add_i16(fw_cfg, FW_CFG_PPC_HEIGHT, graphic_height);
fw_cfg_add_i16(fw_cfg, FW_CFG_PPC_DEPTH, graphic_depth);
fw_cfg_add_i32(fw_cfg, FW_CFG_PPC_TBFREQ, NANOSECONDS_PER_SECOND);
fw_cfg_add_i16(fw_cfg, FW_CFG_BOOT_DEVICE, boot_device);
qemu_register_boot_set(fw_cfg_boot_set, fw_cfg);
/* Prepare firmware configuration for Open Hack'Ware */
if (m48t59) {
PPC_NVRAM_set_params(m48t59, NVRAM_SIZE, "PREP", machine->ram_size,
boot_device,
kernel_base, kernel_size,
machine->kernel_cmdline,
initrd_base, initrd_size,
/* XXX: need an option to load a NVRAM image */
0,
graphic_width, graphic_height, graphic_depth);
}
}
static void ibm_40p_machine_init(MachineClass *mc)
{
mc->desc = "IBM RS/6000 7020 (40p)",
mc->init = ibm_40p_init;
mc->max_cpus = 1;
mc->default_ram_size = 128 * MiB;
mc->block_default_type = IF_SCSI;
mc->default_boot_order = "c";
mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("604");
mc->default_display = "std";
mc->default_nic = "pcnet";
}
DEFINE_MACHINE("40p", ibm_40p_machine_init)
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