diff options
Diffstat (limited to 'qemu/hw/pci/pci_host.c')
| -rw-r--r-- | qemu/hw/pci/pci_host.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/qemu/hw/pci/pci_host.c b/qemu/hw/pci/pci_host.c new file mode 100644 index 000000000..3e26f9256 --- /dev/null +++ b/qemu/hw/pci/pci_host.c @@ -0,0 +1,191 @@ +/* + * pci_host.c + * + * Copyright (c) 2009 Isaku Yamahata <yamahata at valinux co jp> + * VA Linux Systems Japan K.K. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + + * You should have received a copy of the GNU General Public License along + * with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +#include "hw/pci/pci.h" +#include "hw/pci/pci_host.h" +#include "trace.h" + +/* debug PCI */ +//#define DEBUG_PCI + +#ifdef DEBUG_PCI +#define PCI_DPRINTF(fmt, ...) \ +do { printf("pci_host_data: " fmt , ## __VA_ARGS__); } while (0) +#else +#define PCI_DPRINTF(fmt, ...) +#endif + +/* + * PCI address + * bit 16 - 24: bus number + * bit 8 - 15: devfun number + * bit 0 - 7: offset in configuration space of a given pci device + */ + +/* the helper function to get a PCIDevice* for a given pci address */ +static inline PCIDevice *pci_dev_find_by_addr(PCIBus *bus, uint32_t addr) +{ + uint8_t bus_num = addr >> 16; + uint8_t devfn = addr >> 8; + + return pci_find_device(bus, bus_num, devfn); +} + +void pci_host_config_write_common(PCIDevice *pci_dev, uint32_t addr, + uint32_t limit, uint32_t val, uint32_t len) +{ + assert(len <= 4); + trace_pci_cfg_write(pci_dev->name, PCI_SLOT(pci_dev->devfn), + PCI_FUNC(pci_dev->devfn), addr, val); + pci_dev->config_write(pci_dev, addr, val, MIN(len, limit - addr)); +} + +uint32_t pci_host_config_read_common(PCIDevice *pci_dev, uint32_t addr, + uint32_t limit, uint32_t len) +{ + uint32_t ret; + + assert(len <= 4); + ret = pci_dev->config_read(pci_dev, addr, MIN(len, limit - addr)); + trace_pci_cfg_read(pci_dev->name, PCI_SLOT(pci_dev->devfn), + PCI_FUNC(pci_dev->devfn), addr, ret); + + return ret; +} + +void pci_data_write(PCIBus *s, uint32_t addr, uint32_t val, int len) +{ + PCIDevice *pci_dev = pci_dev_find_by_addr(s, addr); + uint32_t config_addr = addr & (PCI_CONFIG_SPACE_SIZE - 1); + + if (!pci_dev) { + return; + } + + PCI_DPRINTF("%s: %s: addr=%02" PRIx32 " val=%08" PRIx32 " len=%d\n", + __func__, pci_dev->name, config_addr, val, len); + pci_host_config_write_common(pci_dev, config_addr, PCI_CONFIG_SPACE_SIZE, + val, len); +} + +uint32_t pci_data_read(PCIBus *s, uint32_t addr, int len) +{ + PCIDevice *pci_dev = pci_dev_find_by_addr(s, addr); + uint32_t config_addr = addr & (PCI_CONFIG_SPACE_SIZE - 1); + uint32_t val; + + if (!pci_dev) { + return ~0x0; + } + + val = pci_host_config_read_common(pci_dev, config_addr, + PCI_CONFIG_SPACE_SIZE, len); + PCI_DPRINTF("%s: %s: addr=%02"PRIx32" val=%08"PRIx32" len=%d\n", + __func__, pci_dev->name, config_addr, val, len); + + return val; +} + +static void pci_host_config_write(void *opaque, hwaddr addr, + uint64_t val, unsigned len) +{ + PCIHostState *s = opaque; + + PCI_DPRINTF("%s addr " TARGET_FMT_plx " len %d val %"PRIx64"\n", + __func__, addr, len, val); + if (addr != 0 || len != 4) { + return; + } + s->config_reg = val; +} + +static uint64_t pci_host_config_read(void *opaque, hwaddr addr, + unsigned len) +{ + PCIHostState *s = opaque; + uint32_t val = s->config_reg; + + PCI_DPRINTF("%s addr " TARGET_FMT_plx " len %d val %"PRIx32"\n", + __func__, addr, len, val); + return val; +} + +static void pci_host_data_write(void *opaque, hwaddr addr, + uint64_t val, unsigned len) +{ + PCIHostState *s = opaque; + PCI_DPRINTF("write addr " TARGET_FMT_plx " len %d val %x\n", + addr, len, (unsigned)val); + if (s->config_reg & (1u << 31)) + pci_data_write(s->bus, s->config_reg | (addr & 3), val, len); +} + +static uint64_t pci_host_data_read(void *opaque, + hwaddr addr, unsigned len) +{ + PCIHostState *s = opaque; + uint32_t val; + if (!(s->config_reg & (1U << 31))) { + return 0xffffffff; + } + val = pci_data_read(s->bus, s->config_reg | (addr & 3), len); + PCI_DPRINTF("read addr " TARGET_FMT_plx " len %d val %x\n", + addr, len, val); + return val; +} + +const MemoryRegionOps pci_host_conf_le_ops = { + .read = pci_host_config_read, + .write = pci_host_config_write, + .endianness = DEVICE_LITTLE_ENDIAN, +}; + +const MemoryRegionOps pci_host_conf_be_ops = { + .read = pci_host_config_read, + .write = pci_host_config_write, + .endianness = DEVICE_BIG_ENDIAN, +}; + +const MemoryRegionOps pci_host_data_le_ops = { + .read = pci_host_data_read, + .write = pci_host_data_write, + .endianness = DEVICE_LITTLE_ENDIAN, +}; + +const MemoryRegionOps pci_host_data_be_ops = { + .read = pci_host_data_read, + .write = pci_host_data_write, + .endianness = DEVICE_BIG_ENDIAN, +}; + +static const TypeInfo pci_host_type_info = { + .name = TYPE_PCI_HOST_BRIDGE, + .parent = TYPE_SYS_BUS_DEVICE, + .abstract = true, + .class_size = sizeof(PCIHostBridgeClass), + .instance_size = sizeof(PCIHostState), +}; + +static void pci_host_register_types(void) +{ + type_register_static(&pci_host_type_info); +} + +type_init(pci_host_register_types) |