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mirror_qemu/hw/isa/piix.c

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/*
* QEMU PIIX PCI ISA Bridge Emulation
*
* Copyright (c) 2006 Fabrice Bellard
* Copyright (c) 2018 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 "qemu/range.h"
#include "qapi/error.h"
#include "hw/dma/i8257.h"
#include "hw/southbridge/piix.h"
#include "hw/timer/i8254.h"
#include "hw/irq.h"
#include "hw/qdev-properties.h"
#include "hw/ide/piix.h"
#include "hw/intc/i8259.h"
#include "hw/isa/isa.h"
#include "sysemu/runstate.h"
#include "migration/vmstate.h"
#include "hw/acpi/acpi_aml_interface.h"
static void piix_set_irq_pic(PIIXState *s, int pic_irq)
{
qemu_set_irq(s->isa_irqs_in[pic_irq],
!!(s->pic_levels &
(((1ULL << PIIX_NUM_PIRQS) - 1) <<
(pic_irq * PIIX_NUM_PIRQS))));
}
static void piix_set_pci_irq_level_internal(PIIXState *s, int pirq, int level)
{
int pic_irq;
uint64_t mask;
pic_irq = s->dev.config[PIIX_PIRQCA + pirq];
if (pic_irq >= ISA_NUM_IRQS) {
return;
}
mask = 1ULL << ((pic_irq * PIIX_NUM_PIRQS) + pirq);
s->pic_levels &= ~mask;
s->pic_levels |= mask * !!level;
}
static void piix_set_pci_irq_level(PIIXState *s, int pirq, int level)
{
int pic_irq;
pic_irq = s->dev.config[PIIX_PIRQCA + pirq];
if (pic_irq >= ISA_NUM_IRQS) {
return;
}
piix_set_pci_irq_level_internal(s, pirq, level);
piix_set_irq_pic(s, pic_irq);
}
static void piix_set_pci_irq(void *opaque, int pirq, int level)
{
PIIXState *s = opaque;
piix_set_pci_irq_level(s, pirq, level);
}
static void piix_request_i8259_irq(void *opaque, int irq, int level)
{
PIIXState *s = opaque;
qemu_set_irq(s->cpu_intr, level);
}
static PCIINTxRoute piix_route_intx_pin_to_irq(void *opaque, int pin)
{
PCIDevice *pci_dev = opaque;
int irq = pci_dev->config[PIIX_PIRQCA + pin];
PCIINTxRoute route;
if (irq < ISA_NUM_IRQS) {
route.mode = PCI_INTX_ENABLED;
route.irq = irq;
} else {
route.mode = PCI_INTX_DISABLED;
route.irq = -1;
}
return route;
}
/* irq routing is changed. so rebuild bitmap */
static void piix_update_pci_irq_levels(PIIXState *s)
{
PCIBus *bus = pci_get_bus(&s->dev);
int pirq;
s->pic_levels = 0;
for (pirq = 0; pirq < PIIX_NUM_PIRQS; pirq++) {
piix_set_pci_irq_level(s, pirq, pci_bus_get_irq_level(bus, pirq));
}
}
static void piix_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_PIRQCA, 4)) {
PIIXState *s = PIIX_PCI_DEVICE(dev);
int pic_irq;
pci_bus_fire_intx_routing_notifier(pci_get_bus(&s->dev));
piix_update_pci_irq_levels(s);
for (pic_irq = 0; pic_irq < ISA_NUM_IRQS; pic_irq++) {
piix_set_irq_pic(s, pic_irq);
}
}
}
static void piix_reset(DeviceState *dev)
{
PIIXState *d = PIIX_PCI_DEVICE(dev);
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;
d->rcr = 0;
}
static int piix_post_load(void *opaque, int version_id)
{
PIIXState *s = opaque;
int pirq;
/*
* Because the i8259 has not been deserialized yet, qemu_irq_raise
* might bring the system to a different state than the saved one;
* for example, the interrupt could be masked but the i8259 would
* not know that yet and would trigger an interrupt in the CPU.
*
* Here, we update irq levels without raising the interrupt.
* Interrupt state will be deserialized separately through the i8259.
*/
s->pic_levels = 0;
for (pirq = 0; pirq < PIIX_NUM_PIRQS; pirq++) {
piix_set_pci_irq_level_internal(s, pirq,
pci_bus_get_irq_level(pci_get_bus(&s->dev), pirq));
}
return 0;
}
static int piix4_post_load(void *opaque, int version_id)
{
PIIXState *s = opaque;
if (version_id == 2) {
s->rcr = 0;
}
return piix_post_load(opaque, version_id);
}
static int piix3_pre_save(void *opaque)
{
int i;
PIIXState *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(pci_get_bus(&piix3->dev), i);
}
return 0;
}
static bool piix3_rcr_needed(void *opaque)
{
PIIXState *piix3 = opaque;
return (piix3->rcr != 0);
}
static const VMStateDescription vmstate_piix3_rcr = {
.name = "PIIX3/rcr",
.version_id = 1,
.minimum_version_id = 1,
.needed = piix3_rcr_needed,
.fields = (const VMStateField[]) {
VMSTATE_UINT8(rcr, PIIXState),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_piix3 = {
.name = "PIIX3",
.version_id = 3,
.minimum_version_id = 2,
.post_load = piix_post_load,
.pre_save = piix3_pre_save,
.fields = (const VMStateField[]) {
VMSTATE_PCI_DEVICE(dev, PIIXState),
VMSTATE_INT32_ARRAY_V(pci_irq_levels_vmstate, PIIXState,
PIIX_NUM_PIRQS, 3),
VMSTATE_END_OF_LIST()
},
.subsections = (const VMStateDescription * const []) {
&vmstate_piix3_rcr,
NULL
}
};
static const VMStateDescription vmstate_piix4 = {
.name = "PIIX4",
.version_id = 3,
.minimum_version_id = 2,
.post_load = piix4_post_load,
.fields = (const VMStateField[]) {
VMSTATE_PCI_DEVICE(dev, PIIXState),
VMSTATE_UINT8_V(rcr, PIIXState, 3),
VMSTATE_END_OF_LIST()
}
};
static void rcr_write(void *opaque, hwaddr addr, uint64_t val, unsigned len)
{
PIIXState *d = opaque;
if (val & 4) {
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
return;
}
d->rcr = val & 2; /* keep System Reset type only */
}
static uint64_t rcr_read(void *opaque, hwaddr addr, unsigned len)
{
PIIXState *d = opaque;
return d->rcr;
}
static const MemoryRegionOps rcr_ops = {
.read = rcr_read,
.write = rcr_write,
.endianness = DEVICE_LITTLE_ENDIAN,
.impl = {
.min_access_size = 1,
.max_access_size = 1,
},
};
static void pci_piix_realize(PCIDevice *dev, const char *uhci_type,
Error **errp)
{
PIIXState *d = PIIX_PCI_DEVICE(dev);
PCIBus *pci_bus = pci_get_bus(dev);
ISABus *isa_bus;
uint32_t irq;
isa_bus = isa_bus_new(DEVICE(d), pci_address_space(dev),
pci_address_space_io(dev), errp);
if (!isa_bus) {
return;
}
memory_region_init_io(&d->rcr_mem, OBJECT(dev), &rcr_ops, d,
"piix-reset-control", 1);
memory_region_add_subregion_overlap(pci_address_space_io(dev),
PIIX_RCR_IOPORT, &d->rcr_mem, 1);
/* PIC */
if (d->has_pic) {
qemu_irq *i8259_out_irq = qemu_allocate_irqs(piix_request_i8259_irq, d,
1);
qemu_irq *i8259 = i8259_init(isa_bus, *i8259_out_irq);
size_t i;
for (i = 0; i < ISA_NUM_IRQS; i++) {
d->isa_irqs_in[i] = i8259[i];
}
g_free(i8259);
qdev_init_gpio_out_named(DEVICE(dev), &d->cpu_intr, "intr", 1);
}
isa_bus_register_input_irqs(isa_bus, d->isa_irqs_in);
/* PIT */
if (d->has_pit) {
i8254_pit_init(isa_bus, 0x40, 0, NULL);
}
i8257_dma_init(OBJECT(dev), isa_bus, 0);
/* RTC */
qdev_prop_set_int32(DEVICE(&d->rtc), "base_year", 2000);
if (!qdev_realize(DEVICE(&d->rtc), BUS(isa_bus), errp)) {
return;
}
irq = object_property_get_uint(OBJECT(&d->rtc), "irq", &error_fatal);
isa_connect_gpio_out(ISA_DEVICE(&d->rtc), 0, irq);
/* IDE */
qdev_prop_set_int32(DEVICE(&d->ide), "addr", dev->devfn + 1);
if (!qdev_realize(DEVICE(&d->ide), BUS(pci_bus), errp)) {
return;
}
/* USB */
if (d->has_usb) {
object_initialize_child(OBJECT(dev), "uhci", &d->uhci, uhci_type);
qdev_prop_set_int32(DEVICE(&d->uhci), "addr", dev->devfn + 2);
if (!qdev_realize(DEVICE(&d->uhci), BUS(pci_bus), errp)) {
return;
}
}
/* Power Management */
if (d->has_acpi) {
object_initialize_child(OBJECT(d), "pm", &d->pm, TYPE_PIIX4_PM);
qdev_prop_set_int32(DEVICE(&d->pm), "addr", dev->devfn + 3);
qdev_prop_set_uint32(DEVICE(&d->pm), "smb_io_base", d->smb_io_base);
qdev_prop_set_bit(DEVICE(&d->pm), "smm-enabled", d->smm_enabled);
if (!qdev_realize(DEVICE(&d->pm), BUS(pci_bus), errp)) {
return;
}
qdev_connect_gpio_out(DEVICE(&d->pm), 0, d->isa_irqs_in[9]);
}
pci_bus_irqs(pci_bus, piix_set_pci_irq, d, PIIX_NUM_PIRQS);
pci_bus_set_route_irq_fn(pci_bus, piix_route_intx_pin_to_irq);
}
static void build_pci_isa_aml(AcpiDevAmlIf *adev, Aml *scope)
{
Aml *field;
Aml *sb_scope = aml_scope("\\_SB");
BusState *bus = qdev_get_child_bus(DEVICE(adev), "isa.0");
/* PIIX PCI to ISA irq remapping */
aml_append(scope, aml_operation_region("P40C", AML_PCI_CONFIG,
aml_int(0x60), 0x04));
/* Fields declarion has to happen *after* operation region */
field = aml_field("PCI0.S08.P40C", AML_BYTE_ACC, AML_NOLOCK, AML_PRESERVE);
aml_append(field, aml_named_field("PRQ0", 8));
aml_append(field, aml_named_field("PRQ1", 8));
aml_append(field, aml_named_field("PRQ2", 8));
aml_append(field, aml_named_field("PRQ3", 8));
aml_append(sb_scope, field);
aml_append(scope, sb_scope);
qbus_build_aml(bus, scope);
}
static void pci_piix_init(Object *obj)
{
PIIXState *d = PIIX_PCI_DEVICE(obj);
qdev_init_gpio_out_named(DEVICE(obj), d->isa_irqs_in, "isa-irqs",
ISA_NUM_IRQS);
object_initialize_child(obj, "rtc", &d->rtc, TYPE_MC146818_RTC);
}
static Property pci_piix_props[] = {
DEFINE_PROP_UINT32("smb_io_base", PIIXState, smb_io_base, 0),
DEFINE_PROP_BOOL("has-acpi", PIIXState, has_acpi, true),
DEFINE_PROP_BOOL("has-pic", PIIXState, has_pic, true),
DEFINE_PROP_BOOL("has-pit", PIIXState, has_pit, true),
DEFINE_PROP_BOOL("has-usb", PIIXState, has_usb, true),
DEFINE_PROP_BOOL("smm-enabled", PIIXState, smm_enabled, false),
DEFINE_PROP_END_OF_LIST(),
};
static void pci_piix_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass);
k->config_write = piix_write_config;
dc->reset = piix_reset;
dc->desc = "ISA bridge";
dc->hotpluggable = false;
k->vendor_id = PCI_VENDOR_ID_INTEL;
k->class_id = PCI_CLASS_BRIDGE_ISA;
/*
* Reason: part of PIIX southbridge, needs to be wired up by e.g.
* pc_piix.c's pc_init1()
*/
dc->user_creatable = false;
device_class_set_props(dc, pci_piix_props);
adevc->build_dev_aml = build_pci_isa_aml;
}
static const TypeInfo piix_pci_type_info = {
.name = TYPE_PIIX_PCI_DEVICE,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(PIIXState),
.instance_init = pci_piix_init,
.abstract = true,
.class_init = pci_piix_class_init,
.interfaces = (InterfaceInfo[]) {
{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
{ TYPE_ACPI_DEV_AML_IF },
{ },
},
};
static void piix3_realize(PCIDevice *dev, Error **errp)
{
pci_piix_realize(dev, TYPE_PIIX3_USB_UHCI, errp);
}
static void piix3_init(Object *obj)
{
PIIXState *d = PIIX_PCI_DEVICE(obj);
object_initialize_child(obj, "ide", &d->ide, TYPE_PIIX3_IDE);
}
static void piix3_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->realize = piix3_realize;
/* 82371SB PIIX3 PCI-to-ISA bridge (Step A1) */
k->device_id = PCI_DEVICE_ID_INTEL_82371SB_0;
dc->vmsd = &vmstate_piix3;
}
static const TypeInfo piix3_info = {
.name = TYPE_PIIX3_DEVICE,
.parent = TYPE_PIIX_PCI_DEVICE,
.instance_init = piix3_init,
.class_init = piix3_class_init,
};
static void piix4_realize(PCIDevice *dev, Error **errp)
{
pci_piix_realize(dev, TYPE_PIIX4_USB_UHCI, errp);
}
static void piix4_init(Object *obj)
{
PIIXState *s = PIIX_PCI_DEVICE(obj);
object_initialize_child(obj, "ide", &s->ide, TYPE_PIIX4_IDE);
}
static void piix4_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->realize = piix4_realize;
k->device_id = PCI_DEVICE_ID_INTEL_82371AB_0;
dc->vmsd = &vmstate_piix4;
}
static const TypeInfo piix4_info = {
.name = TYPE_PIIX4_PCI_DEVICE,
.parent = TYPE_PIIX_PCI_DEVICE,
.instance_init = piix4_init,
.class_init = piix4_class_init,
};
static void piix3_register_types(void)
{
type_register_static(&piix_pci_type_info);
type_register_static(&piix3_info);
type_register_static(&piix4_info);
}
type_init(piix3_register_types)
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