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qemu/hw/piix_pci.c
Anthony Liguori 57c9fafe0f qom: move properties from qdev to object 
This is mostly code movement although not entirely.  This makes properties part
of the Object base class which means that we can now start using Object in a
meaningful way outside of qdev.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-02-03 10:41:08 -06:00

600 lines
19 KiB
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/*
* QEMU i440FX/PIIX3 PCI Bridge Emulation
*
* Copyright (c) 2006 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 "hw.h"
#include "pc.h"
#include "pci.h"
#include "pci_host.h"
#include "isa.h"
#include "sysbus.h"
#include "range.h"
#include "xen.h"
/*
* I440FX chipset data sheet.
* http://download.intel.com/design/chipsets/datashts/29054901.pdf
*/
typedef PCIHostState I440FXState;
#define PIIX_NUM_PIC_IRQS 16 /* i8259 * 2 */
#define PIIX_NUM_PIRQS 4ULL /* PIRQ[A-D] */
#define XEN_PIIX_NUM_PIRQS 128ULL
#define PIIX_PIRQC 0x60
typedef struct PIIX3State {
PCIDevice dev;
/*
* bitmap to track pic levels.
* The pic level is the logical OR of all the PCI irqs mapped to it
* So one PIC level is tracked by PIIX_NUM_PIRQS bits.
*
* PIRQ is mapped to PIC pins, we track it by
* PIIX_NUM_PIRQS * PIIX_NUM_PIC_IRQS = 64 bits with
* pic_irq * PIIX_NUM_PIRQS + pirq
*/
#if PIIX_NUM_PIC_IRQS * PIIX_NUM_PIRQS > 64
#error "unable to encode pic state in 64bit in pic_levels."
#endif
uint64_t pic_levels;
qemu_irq *pic;
/* This member isn't used. Just for save/load compatibility */
int32_t pci_irq_levels_vmstate[PIIX_NUM_PIRQS];
} PIIX3State;
typedef struct PAMMemoryRegion {
MemoryRegion mem;
bool initialized;
} PAMMemoryRegion;
struct PCII440FXState {
PCIDevice dev;
MemoryRegion *system_memory;
MemoryRegion *pci_address_space;
MemoryRegion *ram_memory;
MemoryRegion pci_hole;
MemoryRegion pci_hole_64bit;
PAMMemoryRegion pam_regions[13];
MemoryRegion smram_region;
uint8_t smm_enabled;
};
#define I440FX_PAM 0x59
#define I440FX_PAM_SIZE 7
#define I440FX_SMRAM 0x72
static void piix3_set_irq(void *opaque, int pirq, int level);
static void piix3_write_config_xen(PCIDevice *dev,
uint32_t address, uint32_t val, int len);
/* return the global irq number corresponding to a given device irq
pin. We could also use the bus number to have a more precise
mapping. */
static int pci_slot_get_pirq(PCIDevice *pci_dev, int pci_intx)
{
int slot_addend;
slot_addend = (pci_dev->devfn >> 3) - 1;
return (pci_intx + slot_addend) & 3;
}
static void update_pam(PCII440FXState *d, uint32_t start, uint32_t end, int r,
PAMMemoryRegion *mem)
{
if (mem->initialized) {
memory_region_del_subregion(d->system_memory, &mem->mem);
memory_region_destroy(&mem->mem);
}
// printf("ISA mapping %08x-0x%08x: %d\n", start, end, r);
switch(r) {
case 3:
/* RAM */
memory_region_init_alias(&mem->mem, "pam-ram", d->ram_memory,
start, end - start);
break;
case 1:
/* ROM (XXX: not quite correct) */
memory_region_init_alias(&mem->mem, "pam-rom", d->ram_memory,
start, end - start);
memory_region_set_readonly(&mem->mem, true);
break;
case 2:
case 0:
/* XXX: should distinguish read/write cases */
memory_region_init_alias(&mem->mem, "pam-pci", d->pci_address_space,
start, end - start);
break;
}
memory_region_add_subregion_overlap(d->system_memory,
start, &mem->mem, 1);
mem->initialized = true;
}
static void i440fx_update_memory_mappings(PCII440FXState *d)
{
int i, r;
uint32_t smram;
bool smram_enabled;
memory_region_transaction_begin();
update_pam(d, 0xf0000, 0x100000, (d->dev.config[I440FX_PAM] >> 4) & 3,
&d->pam_regions[0]);
for(i = 0; i < 12; i++) {
r = (d->dev.config[(i >> 1) + (I440FX_PAM + 1)] >> ((i & 1) * 4)) & 3;
update_pam(d, 0xc0000 + 0x4000 * i, 0xc0000 + 0x4000 * (i + 1), r,
&d->pam_regions[i+1]);
}
smram = d->dev.config[I440FX_SMRAM];
smram_enabled = (d->smm_enabled && (smram & 0x08)) || (smram & 0x40);
memory_region_set_enabled(&d->smram_region, !smram_enabled);
memory_region_transaction_commit();
}
static void i440fx_set_smm(int val, void *arg)
{
PCII440FXState *d = arg;
val = (val != 0);
if (d->smm_enabled != val) {
d->smm_enabled = val;
i440fx_update_memory_mappings(d);
}
}
static void i440fx_write_config(PCIDevice *dev,
uint32_t address, uint32_t val, int len)
{
PCII440FXState *d = DO_UPCAST(PCII440FXState, dev, dev);
/* XXX: implement SMRAM.D_LOCK */
pci_default_write_config(dev, address, val, len);
if (ranges_overlap(address, len, I440FX_PAM, I440FX_PAM_SIZE) ||
range_covers_byte(address, len, I440FX_SMRAM)) {
i440fx_update_memory_mappings(d);
}
}
static int i440fx_load_old(QEMUFile* f, void *opaque, int version_id)
{
PCII440FXState *d = opaque;
int ret, i;
ret = pci_device_load(&d->dev, f);
if (ret < 0)
return ret;
i440fx_update_memory_mappings(d);
qemu_get_8s(f, &d->smm_enabled);
if (version_id == 2) {
for (i = 0; i < PIIX_NUM_PIRQS; i++) {
qemu_get_be32(f); /* dummy load for compatibility */
}
}
return 0;
}
static int i440fx_post_load(void *opaque, int version_id)
{
PCII440FXState *d = opaque;
i440fx_update_memory_mappings(d);
return 0;
}
static const VMStateDescription vmstate_i440fx = {
.name = "I440FX",
.version_id = 3,
.minimum_version_id = 3,
.minimum_version_id_old = 1,
.load_state_old = i440fx_load_old,
.post_load = i440fx_post_load,
.fields = (VMStateField []) {
VMSTATE_PCI_DEVICE(dev, PCII440FXState),
VMSTATE_UINT8(smm_enabled, PCII440FXState),
VMSTATE_END_OF_LIST()
}
};
static int i440fx_pcihost_initfn(SysBusDevice *dev)
{
I440FXState *s = FROM_SYSBUS(I440FXState, dev);
memory_region_init_io(&s->conf_mem, &pci_host_conf_le_ops, s,
"pci-conf-idx", 4);
sysbus_add_io(dev, 0xcf8, &s->conf_mem);
sysbus_init_ioports(&s->busdev, 0xcf8, 4);
memory_region_init_io(&s->data_mem, &pci_host_data_le_ops, s,
"pci-conf-data", 4);
sysbus_add_io(dev, 0xcfc, &s->data_mem);
sysbus_init_ioports(&s->busdev, 0xcfc, 4);
return 0;
}
static int i440fx_initfn(PCIDevice *dev)
{
PCII440FXState *d = DO_UPCAST(PCII440FXState, dev, dev);
d->dev.config[I440FX_SMRAM] = 0x02;
cpu_smm_register(&i440fx_set_smm, d);
return 0;
}
static PCIBus *i440fx_common_init(const char *device_name,
PCII440FXState **pi440fx_state,
int *piix3_devfn,
ISABus **isa_bus, qemu_irq *pic,
MemoryRegion *address_space_mem,
MemoryRegion *address_space_io,
ram_addr_t ram_size,
target_phys_addr_t pci_hole_start,
target_phys_addr_t pci_hole_size,
target_phys_addr_t pci_hole64_start,
target_phys_addr_t pci_hole64_size,
MemoryRegion *pci_address_space,
MemoryRegion *ram_memory)
{
DeviceState *dev;
PCIBus *b;
PCIDevice *d;
I440FXState *s;
PIIX3State *piix3;
PCII440FXState *f;
dev = qdev_create(NULL, "i440FX-pcihost");
s = FROM_SYSBUS(I440FXState, sysbus_from_qdev(dev));
s->address_space = address_space_mem;
b = pci_bus_new(&s->busdev.qdev, NULL, pci_address_space,
address_space_io, 0);
s->bus = b;
qdev_init_nofail(dev);
object_property_add_child(object_get_root(), "i440fx", OBJECT(dev), NULL);
d = pci_create_simple(b, 0, device_name);
*pi440fx_state = DO_UPCAST(PCII440FXState, dev, d);
f = *pi440fx_state;
f->system_memory = address_space_mem;
f->pci_address_space = pci_address_space;
f->ram_memory = ram_memory;
memory_region_init_alias(&f->pci_hole, "pci-hole", f->pci_address_space,
pci_hole_start, pci_hole_size);
memory_region_add_subregion(f->system_memory, pci_hole_start, &f->pci_hole);
memory_region_init_alias(&f->pci_hole_64bit, "pci-hole64",
f->pci_address_space,
pci_hole64_start, pci_hole64_size);
if (pci_hole64_size) {
memory_region_add_subregion(f->system_memory, pci_hole64_start,
&f->pci_hole_64bit);
}
memory_region_init_alias(&f->smram_region, "smram-region",
f->pci_address_space, 0xa0000, 0x20000);
memory_region_add_subregion_overlap(f->system_memory, 0xa0000,
&f->smram_region, 1);
memory_region_set_enabled(&f->smram_region, false);
/* Xen supports additional interrupt routes from the PCI devices to
* the IOAPIC: the four pins of each PCI device on the bus are also
* connected to the IOAPIC directly.
* These additional routes can be discovered through ACPI. */
if (xen_enabled()) {
piix3 = DO_UPCAST(PIIX3State, dev,
pci_create_simple_multifunction(b, -1, true, "PIIX3-xen"));
pci_bus_irqs(b, xen_piix3_set_irq, xen_pci_slot_get_pirq,
piix3, XEN_PIIX_NUM_PIRQS);
} else {
piix3 = DO_UPCAST(PIIX3State, dev,
pci_create_simple_multifunction(b, -1, true, "PIIX3"));
pci_bus_irqs(b, piix3_set_irq, pci_slot_get_pirq, piix3,
PIIX_NUM_PIRQS);
}
object_property_add_child(OBJECT(dev), "piix3", OBJECT(piix3), NULL);
piix3->pic = pic;
*isa_bus = DO_UPCAST(ISABus, qbus,
qdev_get_child_bus(&piix3->dev.qdev, "isa.0"));
*piix3_devfn = piix3->dev.devfn;
ram_size = ram_size / 8 / 1024 / 1024;
if (ram_size > 255)
ram_size = 255;
(*pi440fx_state)->dev.config[0x57]=ram_size;
i440fx_update_memory_mappings(f);
return b;
}
PCIBus *i440fx_init(PCII440FXState **pi440fx_state, int *piix3_devfn,
ISABus **isa_bus, qemu_irq *pic,
MemoryRegion *address_space_mem,
MemoryRegion *address_space_io,
ram_addr_t ram_size,
target_phys_addr_t pci_hole_start,
target_phys_addr_t pci_hole_size,
target_phys_addr_t pci_hole64_start,
target_phys_addr_t pci_hole64_size,
MemoryRegion *pci_memory, MemoryRegion *ram_memory)
{
PCIBus *b;
b = i440fx_common_init("i440FX", pi440fx_state, piix3_devfn, isa_bus, pic,
address_space_mem, address_space_io, ram_size,
pci_hole_start, pci_hole_size,
pci_hole64_size, pci_hole64_size,
pci_memory, ram_memory);
return b;
}
/* PIIX3 PCI to ISA bridge */
static void piix3_set_irq_pic(PIIX3State *piix3, int pic_irq)
{
qemu_set_irq(piix3->pic[pic_irq],
!!(piix3->pic_levels &
(((1ULL << PIIX_NUM_PIRQS) - 1) <<
(pic_irq * PIIX_NUM_PIRQS))));
}
static void piix3_set_irq_level(PIIX3State *piix3, int pirq, int level)
{
int pic_irq;
uint64_t mask;
pic_irq = piix3->dev.config[PIIX_PIRQC + pirq];
if (pic_irq >= PIIX_NUM_PIC_IRQS) {
return;
}
mask = 1ULL << ((pic_irq * PIIX_NUM_PIRQS) + pirq);
piix3->pic_levels &= ~mask;
piix3->pic_levels |= mask * !!level;
piix3_set_irq_pic(piix3, pic_irq);
}
static void piix3_set_irq(void *opaque, int pirq, int level)
{
PIIX3State *piix3 = opaque;
piix3_set_irq_level(piix3, pirq, level);
}
/* irq routing is changed. so rebuild bitmap */
static void piix3_update_irq_levels(PIIX3State *piix3)
{
int pirq;
piix3->pic_levels = 0;
for (pirq = 0; pirq < PIIX_NUM_PIRQS; pirq++) {
piix3_set_irq_level(piix3, pirq,
pci_bus_get_irq_level(piix3->dev.bus, pirq));
}
}
static void piix3_write_config(PCIDevice *dev,
uint32_t address, uint32_t val, int len)
{
pci_default_write_config(dev, address, val, len);
if (ranges_overlap(address, len, PIIX_PIRQC, 4)) {
PIIX3State *piix3 = DO_UPCAST(PIIX3State, dev, dev);
int pic_irq;
piix3_update_irq_levels(piix3);
for (pic_irq = 0; pic_irq < PIIX_NUM_PIC_IRQS; pic_irq++) {
piix3_set_irq_pic(piix3, pic_irq);
}
}
}
static void piix3_write_config_xen(PCIDevice *dev,
uint32_t address, uint32_t val, int len)
{
xen_piix_pci_write_config_client(address, val, len);
piix3_write_config(dev, address, val, len);
}
static void piix3_reset(void *opaque)
{
PIIX3State *d = opaque;
uint8_t *pci_conf = d->dev.config;
pci_conf[0x04] = 0x07; // master, memory and I/O
pci_conf[0x05] = 0x00;
pci_conf[0x06] = 0x00;
pci_conf[0x07] = 0x02; // PCI_status_devsel_medium
pci_conf[0x4c] = 0x4d;
pci_conf[0x4e] = 0x03;
pci_conf[0x4f] = 0x00;
pci_conf[0x60] = 0x80;
pci_conf[0x61] = 0x80;
pci_conf[0x62] = 0x80;
pci_conf[0x63] = 0x80;
pci_conf[0x69] = 0x02;
pci_conf[0x70] = 0x80;
pci_conf[0x76] = 0x0c;
pci_conf[0x77] = 0x0c;
pci_conf[0x78] = 0x02;
pci_conf[0x79] = 0x00;
pci_conf[0x80] = 0x00;
pci_conf[0x82] = 0x00;
pci_conf[0xa0] = 0x08;
pci_conf[0xa2] = 0x00;
pci_conf[0xa3] = 0x00;
pci_conf[0xa4] = 0x00;
pci_conf[0xa5] = 0x00;
pci_conf[0xa6] = 0x00;
pci_conf[0xa7] = 0x00;
pci_conf[0xa8] = 0x0f;
pci_conf[0xaa] = 0x00;
pci_conf[0xab] = 0x00;
pci_conf[0xac] = 0x00;
pci_conf[0xae] = 0x00;
d->pic_levels = 0;
}
static int piix3_post_load(void *opaque, int version_id)
{
PIIX3State *piix3 = opaque;
piix3_update_irq_levels(piix3);
return 0;
}
static void piix3_pre_save(void *opaque)
{
int i;
PIIX3State *piix3 = opaque;
for (i = 0; i < ARRAY_SIZE(piix3->pci_irq_levels_vmstate); i++) {
piix3->pci_irq_levels_vmstate[i] =
pci_bus_get_irq_level(piix3->dev.bus, i);
}
}
static const VMStateDescription vmstate_piix3 = {
.name = "PIIX3",
.version_id = 3,
.minimum_version_id = 2,
.minimum_version_id_old = 2,
.post_load = piix3_post_load,
.pre_save = piix3_pre_save,
.fields = (VMStateField []) {
VMSTATE_PCI_DEVICE(dev, PIIX3State),
VMSTATE_INT32_ARRAY_V(pci_irq_levels_vmstate, PIIX3State,
PIIX_NUM_PIRQS, 3),
VMSTATE_END_OF_LIST()
}
};
static int piix3_initfn(PCIDevice *dev)
{
PIIX3State *d = DO_UPCAST(PIIX3State, dev, dev);
isa_bus_new(&d->dev.qdev, pci_address_space_io(dev));
qemu_register_reset(piix3_reset, d);
return 0;
}
static void piix3_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
dc->desc = "ISA bridge";
dc->vmsd = &vmstate_piix3;
dc->no_user = 1,
k->no_hotplug = 1;
k->init = piix3_initfn;
k->config_write = piix3_write_config;
k->vendor_id = PCI_VENDOR_ID_INTEL;
k->device_id = PCI_DEVICE_ID_INTEL_82371SB_0; // 82371SB PIIX3 PCI-to-ISA bridge (Step A1)
k->class_id = PCI_CLASS_BRIDGE_ISA;
}
static TypeInfo piix3_info = {
.name = "PIIX3",
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(PIIX3State),
.class_init = piix3_class_init,
};
static void piix3_xen_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
dc->desc = "ISA bridge";
dc->vmsd = &vmstate_piix3;
dc->no_user = 1;
k->no_hotplug = 1;
k->init = piix3_initfn;
k->config_write = piix3_write_config_xen;
k->vendor_id = PCI_VENDOR_ID_INTEL;
k->device_id = PCI_DEVICE_ID_INTEL_82371SB_0; // 82371SB PIIX3 PCI-to-ISA bridge (Step A1)
k->class_id = PCI_CLASS_BRIDGE_ISA;
};
static TypeInfo piix3_xen_info = {
.name = "PIIX3-xen",
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(PIIX3State),
.class_init = piix3_xen_class_init,
};
static void i440fx_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->no_hotplug = 1;
k->init = i440fx_initfn;
k->config_write = i440fx_write_config;
k->vendor_id = PCI_VENDOR_ID_INTEL;
k->device_id = PCI_DEVICE_ID_INTEL_82441;
k->revision = 0x02;
k->class_id = PCI_CLASS_BRIDGE_HOST;
dc->desc = "Host bridge";
dc->no_user = 1;
dc->vmsd = &vmstate_i440fx;
}
static TypeInfo i440fx_info = {
.name = "i440FX",
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(PCII440FXState),
.class_init = i440fx_class_init,
};
static void i440fx_pcihost_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
k->init = i440fx_pcihost_initfn;
dc->fw_name = "pci";
dc->no_user = 1;
}
static TypeInfo i440fx_pcihost_info = {
.name = "i440FX-pcihost",
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(I440FXState),
.class_init = i440fx_pcihost_class_init,
};
static void i440fx_register(void)
{
type_register_static(&i440fx_info);
type_register_static(&piix3_info);
type_register_static(&piix3_xen_info);
type_register_static(&i440fx_pcihost_info);
}
device_init(i440fx_register);
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