#include "isa.h"
#include "sysbus.h"
#include "range.h"
+#include "xen.h"
/*
* I440FX chipset data sheet.
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;
- int pci_irq_levels[4];
+
+ /*
+ * 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;
- target_phys_addr_t isa_page_descs[384 / 4];
+ 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;
- PIIX3State *piix3;
};
#define I440FX_PAM_SIZE 7
#define I440FX_SMRAM 0x72
-static void piix3_set_irq(void *opaque, int irq_num, int level);
+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 irq_num)
+static int pci_slot_get_pirq(PCIDevice *pci_dev, int pci_intx)
{
int slot_addend;
slot_addend = (pci_dev->devfn >> 3) - 1;
- return (irq_num + slot_addend) & 3;
+ return (pci_intx + slot_addend) & 3;
}
-static void update_pam(PCII440FXState *d, uint32_t start, uint32_t end, int r)
+static void update_pam(PCII440FXState *d, uint32_t start, uint32_t end, int r,
+ PAMMemoryRegion *mem)
{
- uint32_t addr;
+ 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 */
- cpu_register_physical_memory(start, end - start,
- start);
+ memory_region_init_alias(&mem->mem, "pam-ram", d->ram_memory,
+ start, end - start);
break;
case 1:
/* ROM (XXX: not quite correct) */
- cpu_register_physical_memory(start, end - start,
- start | IO_MEM_ROM);
+ 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 */
- for(addr = start; addr < end; addr += 4096) {
- cpu_register_physical_memory(addr, 4096,
- d->isa_page_descs[(addr - 0xa0000) >> 12]);
- }
+ 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, addr;
+ uint32_t smram;
+ bool smram_enabled;
- update_pam(d, 0xf0000, 0x100000, (d->dev.config[I440FX_PAM] >> 4) & 3);
+ 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);
+ update_pam(d, 0xc0000 + 0x4000 * i, 0xc0000 + 0x4000 * (i + 1), r,
+ &d->pam_regions[i+1]);
}
smram = d->dev.config[I440FX_SMRAM];
- if ((d->smm_enabled && (smram & 0x08)) || (smram & 0x40)) {
- cpu_register_physical_memory(0xa0000, 0x20000, 0xa0000);
- } else {
- for(addr = 0xa0000; addr < 0xc0000; addr += 4096) {
- cpu_register_physical_memory(addr, 4096,
- d->isa_page_descs[(addr - 0xa0000) >> 12]);
- }
- }
+ 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)
}
-/* XXX: suppress when better memory API. We make the assumption that
- no device (in particular the VGA) changes the memory mappings in
- the 0xa0000-0x100000 range */
-void i440fx_init_memory_mappings(PCII440FXState *d)
-{
- int i;
- for(i = 0; i < 96; i++) {
- d->isa_page_descs[i] = cpu_get_physical_page_desc(0xa0000 + i * 0x1000);
- }
-}
-
static void i440fx_write_config(PCIDevice *dev,
uint32_t address, uint32_t val, int len)
{
i440fx_update_memory_mappings(d);
qemu_get_8s(f, &d->smm_enabled);
- if (version_id == 2)
- for (i = 0; i < 4; i++)
- d->piix3->pci_irq_levels[i] = qemu_get_be32(f);
+ if (version_id == 2) {
+ for (i = 0; i < PIIX_NUM_PIRQS; i++) {
+ qemu_get_be32(f); /* dummy load for compatibility */
+ }
+ }
return 0;
}
{
I440FXState *s = FROM_SYSBUS(I440FXState, dev);
- pci_host_conf_register_ioport(0xcf8, s);
+ 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);
- pci_host_data_register_ioport(0xcfc, s);
return 0;
}
{
PCII440FXState *d = DO_UPCAST(PCII440FXState, dev, dev);
- pci_config_set_vendor_id(d->dev.config, PCI_VENDOR_ID_INTEL);
- pci_config_set_device_id(d->dev.config, PCI_DEVICE_ID_INTEL_82441);
- d->dev.config[0x08] = 0x02; // revision
- pci_config_set_class(d->dev.config, PCI_CLASS_BRIDGE_HOST);
-
d->dev.config[I440FX_SMRAM] = 0x02;
cpu_smm_register(&i440fx_set_smm, d);
return 0;
}
-PCIBus *i440fx_init(PCII440FXState **pi440fx_state, int *piix3_devfn, qemu_irq *pic, ram_addr_t ram_size)
+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));
- b = pci_bus_new(&s->busdev.qdev, NULL, 0);
+ 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);
+ qdev_property_add_child(qdev_get_root(), "i440fx", dev, NULL);
- d = pci_create_simple(b, 0, "i440FX");
+ d = pci_create_simple(b, 0, device_name);
*pi440fx_state = DO_UPCAST(PCII440FXState, dev, d);
-
- piix3 = DO_UPCAST(PIIX3State, dev,
- pci_create_simple_multifunction(b, -1, true, "PIIX3"));
+ 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);
+ }
+ qdev_property_add_child(dev, "piix3", &piix3->dev.qdev, NULL);
piix3->pic = pic;
- pci_bus_irqs(b, piix3_set_irq, pci_slot_get_pirq, piix3, 4);
- (*pi440fx_state)->piix3 = piix3;
+ *isa_bus = DO_UPCAST(ISABus, qbus,
+ qdev_get_child_bus(&piix3->dev.qdev, "isa.0"));
*piix3_devfn = piix3->dev.devfn;
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;
-static void piix3_set_irq(void *opaque, int irq_num, int level)
+ 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)
{
- int i, pic_irq, pic_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));
+ }
+}
- piix3->pci_irq_levels[irq_num] = level;
-
- /* now we change the pic irq level according to the piix irq mappings */
- /* XXX: optimize */
- pic_irq = piix3->dev.config[0x60 + irq_num];
- if (pic_irq < 16) {
- /* The pic level is the logical OR of all the PCI irqs mapped
- to it */
- pic_level = 0;
- for (i = 0; i < 4; i++) {
- if (pic_irq == piix3->dev.config[0x60 + i])
- pic_level |= piix3->pci_irq_levels[i];
+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);
}
- qemu_set_irq(piix3->pic[pic_irq], pic_level);
}
}
+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;
pci_conf[0xac] = 0x00;
pci_conf[0xae] = 0x00;
- memset(d->pci_irq_levels, 0, sizeof(d->pci_irq_levels));
+ 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 = {
.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, PIIX3State, 4, 3),
+ 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);
- uint8_t *pci_conf;
-
- isa_bus_new(&d->dev.qdev);
-
- pci_conf = d->dev.config;
- pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_INTEL);
- pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_INTEL_82371SB_0); // 82371SB PIIX3 PCI-to-ISA bridge (Step A1)
- pci_config_set_class(pci_conf, PCI_CLASS_BRIDGE_ISA);
+ isa_bus_new(&d->dev.qdev, pci_address_space_io(dev));
qemu_register_reset(piix3_reset, d);
return 0;
}
.qdev.size = sizeof(PCII440FXState),
.qdev.vmsd = &vmstate_i440fx,
.qdev.no_user = 1,
+ .no_hotplug = 1,
.init = i440fx_initfn,
.config_write = i440fx_write_config,
+ .vendor_id = PCI_VENDOR_ID_INTEL,
+ .device_id = PCI_DEVICE_ID_INTEL_82441,
+ .revision = 0x02,
+ .class_id = PCI_CLASS_BRIDGE_HOST,
},{
.qdev.name = "PIIX3",
.qdev.desc = "ISA bridge",
.qdev.size = sizeof(PIIX3State),
.qdev.vmsd = &vmstate_piix3,
.qdev.no_user = 1,
+ .no_hotplug = 1,
+ .init = piix3_initfn,
+ .config_write = piix3_write_config,
+ .vendor_id = PCI_VENDOR_ID_INTEL,
+ .device_id = PCI_DEVICE_ID_INTEL_82371SB_0, // 82371SB PIIX3 PCI-to-ISA bridge (Step A1)
+ .class_id = PCI_CLASS_BRIDGE_ISA,
+ },{
+ .qdev.name = "PIIX3-xen",
+ .qdev.desc = "ISA bridge",
+ .qdev.size = sizeof(PIIX3State),
+ .qdev.vmsd = &vmstate_piix3,
+ .qdev.no_user = 1,
+ .no_hotplug = 1,
.init = piix3_initfn,
+ .config_write = piix3_write_config_xen,
+ .vendor_id = PCI_VENDOR_ID_INTEL,
+ .device_id = PCI_DEVICE_ID_INTEL_82371SB_0, // 82371SB PIIX3 PCI-to-ISA bridge (Step A1)
+ .class_id = PCI_CLASS_BRIDGE_ISA,
},{
/* end of list */
}
projects / mirror_qemu.git / blobdiff