diff options
| -rw-r--r-- | hw/piix_pci.c | 69 |
1 files changed, 35 insertions, 34 deletions
diff --git a/hw/piix_pci.c b/hw/piix_pci.c index 537fc1973c..5bca41d67b 100644 --- a/hw/piix_pci.c +++ b/hw/piix_pci.c @@ -69,8 +69,8 @@ typedef struct PIIX3State { } PIIX3State; typedef struct PAMMemoryRegion { - MemoryRegion mem; - bool initialized; + MemoryRegion alias[4]; /* index = PAM value */ + unsigned current; } PAMMemoryRegion; struct PCII440FXState { @@ -105,37 +105,35 @@ static int pci_slot_get_pirq(PCIDevice *pci_dev, int pci_intx) return (pci_intx + slot_addend) & 3; } -static void update_pam(PCII440FXState *d, uint32_t start, uint32_t end, int r, - PAMMemoryRegion *mem) +static void init_pam(PCII440FXState *d, PAMMemoryRegion *mem, + uint32_t start, uint32_t size) { - if (mem->initialized) { - memory_region_del_subregion(d->system_memory, &mem->mem); - memory_region_destroy(&mem->mem); - } + int i; - // 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; + /* RAM */ + memory_region_init_alias(&mem->alias[3], "pam-ram", d->ram_memory, start, size); + /* ROM (XXX: not quite correct) */ + memory_region_init_alias(&mem->alias[1], "pam-rom", d->ram_memory, start, size); + memory_region_set_readonly(&mem->alias[1], true); + + /* XXX: should distinguish read/write cases */ + memory_region_init_alias(&mem->alias[0], "pam-pci", d->pci_address_space, + start, size); + memory_region_init_alias(&mem->alias[2], "pam-pci", d->pci_address_space, + start, size); + + for (i = 0; i < 4; ++i) { + memory_region_set_enabled(&mem->alias[i], false); + memory_region_add_subregion_overlap(d->system_memory, start, &mem->alias[i], 1); } - memory_region_add_subregion_overlap(d->system_memory, - start, &mem->mem, 1); - mem->initialized = true; + mem->current = 0; +} + +static void update_pam(PAMMemoryRegion *pam, unsigned r) +{ + memory_region_set_enabled(&pam->alias[pam->current], false); + pam->current = r; + memory_region_set_enabled(&pam->alias[pam->current], true); } static void i440fx_update_memory_mappings(PCII440FXState *d) @@ -145,12 +143,10 @@ static void i440fx_update_memory_mappings(PCII440FXState *d) bool smram_enabled; memory_region_transaction_begin(); - update_pam(d, 0xf0000, 0x100000, (d->dev.config[I440FX_PAM] >> 4) & 3, - &d->pam_regions[0]); + update_pam(&d->pam_regions[0], (d->dev.config[I440FX_PAM] >> 4) & 3); 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]); + update_pam(&d->pam_regions[i+1], r); } smram = d->dev.config[I440FX_SMRAM]; smram_enabled = (d->smm_enabled && (smram & 0x08)) || (smram & 0x40); @@ -272,6 +268,7 @@ static PCIBus *i440fx_common_init(const char *device_name, PCIHostState *s; PIIX3State *piix3; PCII440FXState *f; + unsigned i; dev = qdev_create(NULL, "i440FX-pcihost"); s = PCI_HOST_BRIDGE(dev); @@ -303,6 +300,10 @@ static PCIBus *i440fx_common_init(const char *device_name, memory_region_add_subregion_overlap(f->system_memory, 0xa0000, &f->smram_region, 1); memory_region_set_enabled(&f->smram_region, false); + init_pam(f, &f->pam_regions[0], 0xf0000, 0x10000); + for (i = 0; i < 12; ++i) { + init_pam(f, &f->pam_regions[i+1], 0xc0000 + i * 0x4000, 0x4000); + } /* Xen supports additional interrupt routes from the PCI devices to * the IOAPIC: the four pins of each PCI device on the bus are also |