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pci: move pci host stuff from pci.c to pci_host.c

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Move pci host stuff from pci.c to pci_host.c.
And add some comments.
Later pcie host bridge functions will be defined in pcie_host.c
not to bloat pci.c.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Isaku Yamahata 2009-10-30 21:21:15 +09:00 • committed by Anthony Liguori
parent 74e32ac1d1
commit 766347cc8c
2 changed files with 63 additions and 67 deletions
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63
hw/pci_host.c
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@ -32,6 +32,69 @@ do { printf("pci_host_data: " fmt , ## __VA_ARGS__); } while (0)
#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 functio to get a PCIDeice* for a given pci address */
static inline PCIDevice *pci_addr_to_dev(PCIBus *bus, uint32_t addr)
{
uint8_t bus_num = (addr >> 16) & 0xff;
uint8_t devfn = (addr >> 8) & 0xff;
return pci_find_device(bus, bus_num, PCI_SLOT(devfn), PCI_FUNC(devfn));
}
static inline uint32_t pci_addr_to_config(uint32_t addr)
{
return addr & (PCI_CONFIG_SPACE_SIZE - 1);
}
void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len)
{
PCIBus *s = opaque;
PCIDevice *pci_dev = pci_addr_to_dev(s, addr);
uint32_t config_addr = pci_addr_to_config(addr);
if (!pci_dev)
return;
PCI_DPRINTF("%s: %s: addr=%02"PRIx32" val=%08"PRI32x" len=%d\n",
__func__, pci_dev->name, config_addr, val, len);
pci_dev->config_write(pci_dev, config_addr, val, len);
}
uint32_t pci_data_read(void *opaque, uint32_t addr, int len)
{
PCIBus *s = opaque;
PCIDevice *pci_dev = pci_addr_to_dev(s, addr);
uint32_t config_addr = pci_addr_to_config(addr);
uint32_t val;
if (!pci_dev) {
switch(len) {
case 1:
val = 0xff;
break;
case 2:
val = 0xffff;
break;
default:
case 4:
val = 0xffffffff;
break;
}
} else {
val = pci_dev->config_read(pci_dev, config_addr, 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_writel(void *opaque, target_phys_addr_t addr,
uint32_t val)
{