qemu/hw/pci-host/prep.c
Mark Cave-Ayland f40b83a4e3 40p: use OR gate to wire up raven PCI interrupts
According to the PReP specification section 6.1.6 "System Interrupt
Assignments", all PCI interrupts are routed via IRQ 15.

Instead of mapping each PCI IRQ separately, we introduce an OR gate within the
raven PCI host bridge and then wire the single output of the OR gate to the
interrupt controller.

Note that whilst the (now deprecated) PReP machine still exists we still need
to preserve the old IRQ routing. This is done by adding a new "is-legacy-prep"
property to the raven PCI host bridge which is set to true for the PReP
machine.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Hervé Poussineau <hpoussin@reactos.org>
Tested-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2018-09-25 11:12:25 +10:00

434 lines
14 KiB
C

/*
* QEMU PREP PCI host
*
* Copyright (c) 2006 Fabrice Bellard
* Copyright (c) 2011-2013 Andreas Färber
*
* 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/units.h"
#include "qapi/error.h"
#include "hw/hw.h"
#include "hw/pci/pci.h"
#include "hw/pci/pci_bus.h"
#include "hw/pci/pci_host.h"
#include "hw/i386/pc.h"
#include "hw/loader.h"
#include "hw/or-irq.h"
#include "exec/address-spaces.h"
#include "elf.h"
#define TYPE_RAVEN_PCI_DEVICE "raven"
#define TYPE_RAVEN_PCI_HOST_BRIDGE "raven-pcihost"
#define RAVEN_PCI_DEVICE(obj) \
OBJECT_CHECK(RavenPCIState, (obj), TYPE_RAVEN_PCI_DEVICE)
typedef struct RavenPCIState {
PCIDevice dev;
uint32_t elf_machine;
char *bios_name;
MemoryRegion bios;
} RavenPCIState;
#define RAVEN_PCI_HOST_BRIDGE(obj) \
OBJECT_CHECK(PREPPCIState, (obj), TYPE_RAVEN_PCI_HOST_BRIDGE)
typedef struct PRePPCIState {
PCIHostState parent_obj;
qemu_or_irq *or_irq;
qemu_irq pci_irqs[PCI_NUM_PINS];
PCIBus pci_bus;
AddressSpace pci_io_as;
MemoryRegion pci_io;
MemoryRegion pci_io_non_contiguous;
MemoryRegion pci_memory;
MemoryRegion pci_intack;
MemoryRegion bm;
MemoryRegion bm_ram_alias;
MemoryRegion bm_pci_memory_alias;
AddressSpace bm_as;
RavenPCIState pci_dev;
int contiguous_map;
bool is_legacy_prep;
} PREPPCIState;
#define BIOS_SIZE (1 * MiB)
static inline uint32_t raven_pci_io_config(hwaddr addr)
{
int i;
for (i = 0; i < 11; i++) {
if ((addr & (1 << (11 + i))) != 0) {
break;
}
}
return (addr & 0x7ff) | (i << 11);
}
static void raven_pci_io_write(void *opaque, hwaddr addr,
uint64_t val, unsigned int size)
{
PREPPCIState *s = opaque;
PCIHostState *phb = PCI_HOST_BRIDGE(s);
pci_data_write(phb->bus, raven_pci_io_config(addr), val, size);
}
static uint64_t raven_pci_io_read(void *opaque, hwaddr addr,
unsigned int size)
{
PREPPCIState *s = opaque;
PCIHostState *phb = PCI_HOST_BRIDGE(s);
return pci_data_read(phb->bus, raven_pci_io_config(addr), size);
}
static const MemoryRegionOps raven_pci_io_ops = {
.read = raven_pci_io_read,
.write = raven_pci_io_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static uint64_t raven_intack_read(void *opaque, hwaddr addr,
unsigned int size)
{
return pic_read_irq(isa_pic);
}
static const MemoryRegionOps raven_intack_ops = {
.read = raven_intack_read,
.valid = {
.max_access_size = 1,
},
};
static inline hwaddr raven_io_address(PREPPCIState *s,
hwaddr addr)
{
if (s->contiguous_map == 0) {
/* 64 KB contiguous space for IOs */
addr &= 0xFFFF;
} else {
/* 8 MB non-contiguous space for IOs */
addr = (addr & 0x1F) | ((addr & 0x007FFF000) >> 7);
}
/* FIXME: handle endianness switch */
return addr;
}
static uint64_t raven_io_read(void *opaque, hwaddr addr,
unsigned int size)
{
PREPPCIState *s = opaque;
uint8_t buf[4];
addr = raven_io_address(s, addr);
address_space_read(&s->pci_io_as, addr + 0x80000000,
MEMTXATTRS_UNSPECIFIED, buf, size);
if (size == 1) {
return buf[0];
} else if (size == 2) {
return lduw_le_p(buf);
} else if (size == 4) {
return ldl_le_p(buf);
} else {
g_assert_not_reached();
}
}
static void raven_io_write(void *opaque, hwaddr addr,
uint64_t val, unsigned int size)
{
PREPPCIState *s = opaque;
uint8_t buf[4];
addr = raven_io_address(s, addr);
if (size == 1) {
buf[0] = val;
} else if (size == 2) {
stw_le_p(buf, val);
} else if (size == 4) {
stl_le_p(buf, val);
} else {
g_assert_not_reached();
}
address_space_write(&s->pci_io_as, addr + 0x80000000,
MEMTXATTRS_UNSPECIFIED, buf, size);
}
static const MemoryRegionOps raven_io_ops = {
.read = raven_io_read,
.write = raven_io_write,
.endianness = DEVICE_LITTLE_ENDIAN,
.impl.max_access_size = 4,
.valid.unaligned = true,
};
static int raven_map_irq(PCIDevice *pci_dev, int irq_num)
{
return (irq_num + (pci_dev->devfn >> 3)) & 1;
}
static void raven_set_irq(void *opaque, int irq_num, int level)
{
PREPPCIState *s = opaque;
qemu_set_irq(s->pci_irqs[irq_num], level);
}
static AddressSpace *raven_pcihost_set_iommu(PCIBus *bus, void *opaque,
int devfn)
{
PREPPCIState *s = opaque;
return &s->bm_as;
}
static void raven_change_gpio(void *opaque, int n, int level)
{
PREPPCIState *s = opaque;
s->contiguous_map = level;
}
static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
{
SysBusDevice *dev = SYS_BUS_DEVICE(d);
PCIHostState *h = PCI_HOST_BRIDGE(dev);
PREPPCIState *s = RAVEN_PCI_HOST_BRIDGE(dev);
MemoryRegion *address_space_mem = get_system_memory();
int i;
if (s->is_legacy_prep) {
for (i = 0; i < PCI_NUM_PINS; i++) {
sysbus_init_irq(dev, &s->pci_irqs[i]);
}
} else {
/* According to PReP specification section 6.1.6 "System Interrupt
* Assignments", all PCI interrupts are routed via IRQ 15 */
s->or_irq = OR_IRQ(object_new(TYPE_OR_IRQ));
object_property_set_int(OBJECT(s->or_irq), PCI_NUM_PINS, "num-lines",
&error_fatal);
object_property_set_bool(OBJECT(s->or_irq), true, "realized",
&error_fatal);
sysbus_init_irq(dev, &s->or_irq->out_irq);
for (i = 0; i < PCI_NUM_PINS; i++) {
s->pci_irqs[i] = qdev_get_gpio_in(DEVICE(s->or_irq), i);
}
}
qdev_init_gpio_in(d, raven_change_gpio, 1);
pci_bus_irqs(&s->pci_bus, raven_set_irq, raven_map_irq, s, PCI_NUM_PINS);
memory_region_init_io(&h->conf_mem, OBJECT(h), &pci_host_conf_le_ops, s,
"pci-conf-idx", 4);
memory_region_add_subregion(&s->pci_io, 0xcf8, &h->conf_mem);
memory_region_init_io(&h->data_mem, OBJECT(h), &pci_host_data_le_ops, s,
"pci-conf-data", 4);
memory_region_add_subregion(&s->pci_io, 0xcfc, &h->data_mem);
memory_region_init_io(&h->mmcfg, OBJECT(s), &raven_pci_io_ops, s,
"pciio", 0x00400000);
memory_region_add_subregion(address_space_mem, 0x80800000, &h->mmcfg);
memory_region_init_io(&s->pci_intack, OBJECT(s), &raven_intack_ops, s,
"pci-intack", 1);
memory_region_add_subregion(address_space_mem, 0xbffffff0, &s->pci_intack);
/* TODO Remove once realize propagates to child devices. */
object_property_set_bool(OBJECT(&s->pci_bus), true, "realized", errp);
object_property_set_bool(OBJECT(&s->pci_dev), true, "realized", errp);
}
static void raven_pcihost_initfn(Object *obj)
{
PCIHostState *h = PCI_HOST_BRIDGE(obj);
PREPPCIState *s = RAVEN_PCI_HOST_BRIDGE(obj);
MemoryRegion *address_space_mem = get_system_memory();
DeviceState *pci_dev;
memory_region_init(&s->pci_io, obj, "pci-io", 0x3f800000);
memory_region_init_io(&s->pci_io_non_contiguous, obj, &raven_io_ops, s,
"pci-io-non-contiguous", 0x00800000);
memory_region_init(&s->pci_memory, obj, "pci-memory", 0x3f000000);
address_space_init(&s->pci_io_as, &s->pci_io, "raven-io");
/* CPU address space */
memory_region_add_subregion(address_space_mem, 0x80000000, &s->pci_io);
memory_region_add_subregion_overlap(address_space_mem, 0x80000000,
&s->pci_io_non_contiguous, 1);
memory_region_add_subregion(address_space_mem, 0xc0000000, &s->pci_memory);
pci_root_bus_new_inplace(&s->pci_bus, sizeof(s->pci_bus), DEVICE(obj), NULL,
&s->pci_memory, &s->pci_io, 0, TYPE_PCI_BUS);
/* Bus master address space */
memory_region_init(&s->bm, obj, "bm-raven", UINT32_MAX);
memory_region_init_alias(&s->bm_pci_memory_alias, obj, "bm-pci-memory",
&s->pci_memory, 0,
memory_region_size(&s->pci_memory));
memory_region_init_alias(&s->bm_ram_alias, obj, "bm-system",
get_system_memory(), 0, 0x80000000);
memory_region_add_subregion(&s->bm, 0 , &s->bm_pci_memory_alias);
memory_region_add_subregion(&s->bm, 0x80000000, &s->bm_ram_alias);
address_space_init(&s->bm_as, &s->bm, "raven-bm");
pci_setup_iommu(&s->pci_bus, raven_pcihost_set_iommu, s);
h->bus = &s->pci_bus;
object_initialize(&s->pci_dev, sizeof(s->pci_dev), TYPE_RAVEN_PCI_DEVICE);
pci_dev = DEVICE(&s->pci_dev);
qdev_set_parent_bus(pci_dev, BUS(&s->pci_bus));
object_property_set_int(OBJECT(&s->pci_dev), PCI_DEVFN(0, 0), "addr",
NULL);
qdev_prop_set_bit(pci_dev, "multifunction", false);
}
static void raven_realize(PCIDevice *d, Error **errp)
{
RavenPCIState *s = RAVEN_PCI_DEVICE(d);
char *filename;
int bios_size = -1;
d->config[0x0C] = 0x08; // cache_line_size
d->config[0x0D] = 0x10; // latency_timer
d->config[0x34] = 0x00; // capabilities_pointer
memory_region_init_ram_nomigrate(&s->bios, OBJECT(s), "bios", BIOS_SIZE,
&error_fatal);
memory_region_set_readonly(&s->bios, true);
memory_region_add_subregion(get_system_memory(), (uint32_t)(-BIOS_SIZE),
&s->bios);
if (s->bios_name) {
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, s->bios_name);
if (filename) {
if (s->elf_machine != EM_NONE) {
bios_size = load_elf(filename, NULL, NULL, NULL,
NULL, NULL, 1, s->elf_machine, 0, 0);
}
if (bios_size < 0) {
bios_size = get_image_size(filename);
if (bios_size > 0 && bios_size <= BIOS_SIZE) {
hwaddr bios_addr;
bios_size = (bios_size + 0xfff) & ~0xfff;
bios_addr = (uint32_t)(-BIOS_SIZE);
bios_size = load_image_targphys(filename, bios_addr,
bios_size);
}
}
}
g_free(filename);
if (bios_size < 0 || bios_size > BIOS_SIZE) {
memory_region_del_subregion(get_system_memory(), &s->bios);
error_setg(errp, "Could not load bios image '%s'", s->bios_name);
return;
}
}
vmstate_register_ram_global(&s->bios);
}
static const VMStateDescription vmstate_raven = {
.name = "raven",
.version_id = 0,
.minimum_version_id = 0,
.fields = (VMStateField[]) {
VMSTATE_PCI_DEVICE(dev, RavenPCIState),
VMSTATE_END_OF_LIST()
},
};
static void raven_class_init(ObjectClass *klass, void *data)
{
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
k->realize = raven_realize;
k->vendor_id = PCI_VENDOR_ID_MOTOROLA;
k->device_id = PCI_DEVICE_ID_MOTOROLA_RAVEN;
k->revision = 0x00;
k->class_id = PCI_CLASS_BRIDGE_HOST;
dc->desc = "PReP Host Bridge - Motorola Raven";
dc->vmsd = &vmstate_raven;
/*
* Reason: PCI-facing part of the host bridge, not usable without
* the host-facing part, which can't be device_add'ed, yet.
*/
dc->user_creatable = false;
}
static const TypeInfo raven_info = {
.name = TYPE_RAVEN_PCI_DEVICE,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(RavenPCIState),
.class_init = raven_class_init,
.interfaces = (InterfaceInfo[]) {
{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
{ },
},
};
static Property raven_pcihost_properties[] = {
DEFINE_PROP_UINT32("elf-machine", PREPPCIState, pci_dev.elf_machine,
EM_NONE),
DEFINE_PROP_STRING("bios-name", PREPPCIState, pci_dev.bios_name),
/* Temporary workaround until legacy prep machine is removed */
DEFINE_PROP_BOOL("is-legacy-prep", PREPPCIState, is_legacy_prep,
false),
DEFINE_PROP_END_OF_LIST()
};
static void raven_pcihost_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
dc->realize = raven_pcihost_realizefn;
dc->props = raven_pcihost_properties;
dc->fw_name = "pci";
}
static const TypeInfo raven_pcihost_info = {
.name = TYPE_RAVEN_PCI_HOST_BRIDGE,
.parent = TYPE_PCI_HOST_BRIDGE,
.instance_size = sizeof(PREPPCIState),
.instance_init = raven_pcihost_initfn,
.class_init = raven_pcihost_class_init,
};
static void raven_register_types(void)
{
type_register_static(&raven_pcihost_info);
type_register_static(&raven_info);
}
type_init(raven_register_types)