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- #ifndef _GPXE_EFI_PCI_H
- #define _GPXE_EFI_PCI_H
-
- /** @file
- *
- * gPXE PCI I/O API for EFI
- *
- */
-
- #ifdef PCIAPI_EFI
- #define PCIAPI_PREFIX_efi
- #else
- #define PCIAPI_PREFIX_efi __efi_
- #endif
-
- /* EFI PCI width codes defined by EFI spec */
- #define EFIPCI_WIDTH_BYTE 0
- #define EFIPCI_WIDTH_WORD 1
- #define EFIPCI_WIDTH_DWORD 2
-
- #define EFIPCI_LOCATION( _offset, _width ) \
- ( (_offset) | ( (_width) << 16 ) )
- #define EFIPCI_OFFSET( _location ) ( (_location) & 0xffff )
- #define EFIPCI_WIDTH( _location ) ( (_location) >> 16 )
-
- struct pci_device;
-
- extern int efipci_read ( struct pci_device *pci, unsigned long location,
- void *value );
- extern int efipci_write ( struct pci_device *pci, unsigned long location,
- unsigned long value );
-
- /**
- * Determine maximum PCI bus number within system
- *
- * @ret max_bus Maximum bus number
- */
- static inline __always_inline int
- PCIAPI_INLINE ( efi, pci_max_bus ) ( void ) {
- /* No way to work this out via EFI */
- return 0xff;
- }
-
- /**
- * Read byte from PCI configuration space via EFI
- *
- * @v pci PCI device
- * @v where Location within PCI configuration space
- * @v value Value read
- * @ret rc Return status code
- */
- static inline __always_inline int
- PCIAPI_INLINE ( efi, pci_read_config_byte ) ( struct pci_device *pci,
- unsigned int where,
- uint8_t *value ) {
- return efipci_read ( pci,
- EFIPCI_LOCATION ( where, EFIPCI_WIDTH_BYTE ),
- value );
- }
-
- /**
- * Read word from PCI configuration space via EFI
- *
- * @v pci PCI device
- * @v where Location within PCI configuration space
- * @v value Value read
- * @ret rc Return status code
- */
- static inline __always_inline int
- PCIAPI_INLINE ( efi, pci_read_config_word ) ( struct pci_device *pci,
- unsigned int where,
- uint16_t *value ) {
- return efipci_read ( pci,
- EFIPCI_LOCATION ( where, EFIPCI_WIDTH_WORD ),
- value );
- }
-
- /**
- * Read dword from PCI configuration space via EFI
- *
- * @v pci PCI device
- * @v where Location within PCI configuration space
- * @v value Value read
- * @ret rc Return status code
- */
- static inline __always_inline int
- PCIAPI_INLINE ( efi, pci_read_config_dword ) ( struct pci_device *pci,
- unsigned int where,
- uint32_t *value ) {
- return efipci_read ( pci,
- EFIPCI_LOCATION ( where, EFIPCI_WIDTH_DWORD ),
- value );
- }
-
- /**
- * Write byte to PCI configuration space via EFI
- *
- * @v pci PCI device
- * @v where Location within PCI configuration space
- * @v value Value to be written
- * @ret rc Return status code
- */
- static inline __always_inline int
- PCIAPI_INLINE ( efi, pci_write_config_byte ) ( struct pci_device *pci,
- unsigned int where,
- uint8_t value ) {
- return efipci_write ( pci,
- EFIPCI_LOCATION ( where, EFIPCI_WIDTH_BYTE ),
- value );
- }
-
- /**
- * Write word to PCI configuration space via EFI
- *
- * @v pci PCI device
- * @v where Location within PCI configuration space
- * @v value Value to be written
- * @ret rc Return status code
- */
- static inline __always_inline int
- PCIAPI_INLINE ( efi, pci_write_config_word ) ( struct pci_device *pci,
- unsigned int where,
- uint16_t value ) {
- return efipci_write ( pci,
- EFIPCI_LOCATION ( where, EFIPCI_WIDTH_WORD ),
- value );
- }
-
- /**
- * Write dword to PCI configuration space via EFI
- *
- * @v pci PCI device
- * @v where Location within PCI configuration space
- * @v value Value to be written
- * @ret rc Return status code
- */
- static inline __always_inline int
- PCIAPI_INLINE ( efi, pci_write_config_dword ) ( struct pci_device *pci,
- unsigned int where,
- uint32_t value ) {
- return efipci_write ( pci,
- EFIPCI_LOCATION ( where, EFIPCI_WIDTH_DWORD ),
- value );
- }
-
- #endif /* _GPXE_EFI_PCI_H */
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