diff options
Diffstat (limited to 'hw/pci.c')
| -rw-r--r-- | hw/pci.c | 145 |
1 files changed, 29 insertions, 116 deletions
@@ -255,6 +255,17 @@ static PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr) return pci_find_bus(bus); } +static void pci_init_wmask(PCIDevice *dev) +{ + int i; + dev->wmask[PCI_CACHE_LINE_SIZE] = 0xff; + dev->wmask[PCI_INTERRUPT_LINE] = 0xff; + dev->wmask[PCI_COMMAND] = PCI_COMMAND_IO | PCI_COMMAND_MEMORY + | PCI_COMMAND_MASTER; + for (i = PCI_CONFIG_HEADER_SIZE; i < PCI_CONFIG_SPACE_SIZE; ++i) + dev->wmask[i] = 0xff; +} + /* -1 for devfn means auto assign */ static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus, const char *name, int devfn, @@ -276,6 +287,7 @@ static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus, pstrcpy(pci_dev->name, sizeof(pci_dev->name), name); memset(pci_dev->irq_state, 0, sizeof(pci_dev->irq_state)); pci_set_default_subsystem_id(pci_dev); + pci_init_wmask(pci_dev); if (!config_read) config_read = pci_default_read_config; @@ -347,6 +359,7 @@ void pci_register_bar(PCIDevice *pci_dev, int region_num, { PCIIORegion *r; uint32_t addr; + uint32_t wmask; if ((unsigned int)region_num >= PCI_NUM_REGIONS) return; @@ -362,12 +375,17 @@ void pci_register_bar(PCIDevice *pci_dev, int region_num, r->size = size; r->type = type; r->map_func = map_func; + + wmask = ~(size - 1); if (region_num == PCI_ROM_SLOT) { addr = 0x30; + /* ROM enable bit is writeable */ + wmask |= 1; } else { addr = 0x10 + region_num * 4; } *(uint32_t *)(pci_dev->config + addr) = cpu_to_le32(type); + *(uint32_t *)(pci_dev->wmask + addr) = cpu_to_le32(wmask); } static void pci_update_mappings(PCIDevice *d) @@ -476,118 +494,21 @@ uint32_t pci_default_read_config(PCIDevice *d, return val; } -void pci_default_write_config(PCIDevice *d, - uint32_t address, uint32_t val, int len) +void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l) { - int can_write, i; - uint32_t end, addr; - - if (len == 4 && ((address >= 0x10 && address < 0x10 + 4 * 6) || - (address >= 0x30 && address < 0x34))) { - PCIIORegion *r; - int reg; + uint8_t orig[PCI_CONFIG_SPACE_SIZE]; + int i; - if ( address >= 0x30 ) { - reg = PCI_ROM_SLOT; - }else{ - reg = (address - 0x10) >> 2; - } - r = &d->io_regions[reg]; - if (r->size == 0) - goto default_config; - /* compute the stored value */ - if (reg == PCI_ROM_SLOT) { - /* keep ROM enable bit */ - val &= (~(r->size - 1)) | 1; - } else { - val &= ~(r->size - 1); - val |= r->type; - } - *(uint32_t *)(d->config + address) = cpu_to_le32(val); - pci_update_mappings(d); - return; - } - default_config: /* not efficient, but simple */ - addr = address; - for(i = 0; i < len; i++) { - /* default read/write accesses */ - switch(d->config[0x0e]) { - case 0x00: - case 0x80: - switch(addr) { - case 0x00: - case 0x01: - case 0x02: - case 0x03: - case 0x06: - case 0x07: - case 0x08: - case 0x09: - case 0x0a: - case 0x0b: - case 0x0e: - case 0x10 ... 0x27: /* base */ - case 0x2c ... 0x2f: /* read-only subsystem ID & vendor ID */ - case 0x30 ... 0x33: /* rom */ - case 0x3d: - can_write = 0; - break; - default: - can_write = 1; - break; - } - break; - default: - case 0x01: - switch(addr) { - case 0x00: - case 0x01: - case 0x02: - case 0x03: - case 0x06: - case 0x07: - case 0x08: - case 0x09: - case 0x0a: - case 0x0b: - case 0x0e: - case 0x2c ... 0x2f: /* read-only subsystem ID & vendor ID */ - case 0x38 ... 0x3b: /* rom */ - case 0x3d: - can_write = 0; - break; - default: - can_write = 1; - break; - } - break; - } - if (can_write) { - /* Mask out writes to reserved bits in registers */ - switch (addr) { - case 0x05: - val &= ~PCI_COMMAND_RESERVED_MASK_HI; - break; - case 0x06: - val &= ~PCI_STATUS_RESERVED_MASK_LO; - break; - case 0x07: - val &= ~PCI_STATUS_RESERVED_MASK_HI; - break; - } - d->config[addr] = val; - } - if (++addr > 0xff) - break; - val >>= 8; + memcpy(orig, d->config, PCI_CONFIG_SPACE_SIZE); + for(i = 0; i < l && addr < PCI_CONFIG_SPACE_SIZE; val >>= 8, ++i, ++addr) { + uint8_t wmask = d->wmask[addr]; + d->config[addr] = (d->config[addr] & ~wmask) | (val & wmask); } - - end = address + len; - if (end > PCI_COMMAND && address < (PCI_COMMAND + 2)) { - /* if the command register is modified, we must modify the mappings */ + if (memcmp(orig + PCI_BASE_ADDRESS_0, d->config + PCI_BASE_ADDRESS_0, 24) + || ((orig[PCI_COMMAND] ^ d->config[PCI_COMMAND]) + & (PCI_COMMAND_MEMORY | PCI_COMMAND_IO))) pci_update_mappings(d); - } } void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len) @@ -880,16 +801,8 @@ static void pci_bridge_write_config(PCIDevice *d, { PCIBridge *s = (PCIBridge *)d; - if (address == 0x19 || (address == 0x18 && len > 1)) { - if (address == 0x19) - s->bus->bus_num = val & 0xff; - else - s->bus->bus_num = (val >> 8) & 0xff; -#if defined(DEBUG_PCI) - printf ("pci-bridge: %s: Assigned bus %d\n", d->name, s->bus->bus_num); -#endif - } pci_default_write_config(d, address, val, len); + s->bus->bus_num = d->config[PCI_SECONDARY_BUS]; } PCIBus *pci_find_bus(int bus_num) |
