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