66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
#ifndef i386_PCI_H
|
|
#define i386_PCI_H
|
|
|
|
#include "asm/io.h"
|
|
|
|
#if !(defined(PCI_CONFIG_1) || defined(PCI_CONFIG_2))
|
|
#define PCI_CONFIG_1 1 /* default */
|
|
#endif
|
|
|
|
#ifdef PCI_CONFIG_1
|
|
|
|
/* PCI Configuration Mechanism #1 */
|
|
|
|
/* Have pci_addr in the same format as the values written to 0xcf8
|
|
* so register accesses can be made easy. */
|
|
#define PCI_ADDR(bus, dev, fn) \
|
|
((pci_addr) (0x80000000u \
|
|
| (uint32_t) (bus) << 16 \
|
|
| (uint32_t) (dev) << 11 \
|
|
| (uint32_t) (fn) << 8))
|
|
|
|
#define PCI_BUS(pcidev) ((uint8_t) ((pcidev) >> 16))
|
|
#define PCI_DEV(pcidev) ((uint8_t) ((pcidev) >> 11) & 0x1f)
|
|
#define PCI_FN(pcidev) ((uint8_t) ((pcidev) >> 8) & 7)
|
|
|
|
static inline uint8_t pci_config_read8(pci_addr dev, uint8_t reg)
|
|
{
|
|
outl(dev | (reg & ~3), 0xcf8);
|
|
return inb(0xcfc | (reg & 3));
|
|
}
|
|
|
|
static inline uint16_t pci_config_read16(pci_addr dev, uint8_t reg)
|
|
{
|
|
outl(dev | (reg & ~3), 0xcf8);
|
|
return inw(0xcfc | (reg & 2));
|
|
}
|
|
|
|
static inline uint32_t pci_config_read32(pci_addr dev, uint8_t reg)
|
|
{
|
|
outl(dev | reg, 0xcf8);
|
|
return inl(0xcfc | reg);
|
|
}
|
|
|
|
static inline void pci_config_write8(pci_addr dev, uint8_t reg, uint8_t val)
|
|
{
|
|
outl(dev | (reg & ~3), 0xcf8);
|
|
outb(val, 0xcfc | (reg & 3));
|
|
}
|
|
|
|
static inline void pci_config_write16(pci_addr dev, uint8_t reg, uint16_t val)
|
|
{
|
|
outl(dev | (reg & ~3), 0xcf8);
|
|
outw(val, 0xcfc | (reg & 2));
|
|
}
|
|
|
|
static inline void pci_config_write32(pci_addr dev, uint8_t reg, uint32_t val)
|
|
{
|
|
outl(dev | reg, 0xcf8);
|
|
outl(val, 0xcfc);
|
|
}
|
|
|
|
#else /* !PCI_CONFIG_1 */
|
|
#error PCI Configuration Mechanism is not specified or implemented
|
|
#endif
|
|
|
|
#endif /* i386_PCI_H */
|