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- #ifndef _PCIDIRECT_H
- #define _PCIDIRECT_H
-
- #include <stdint.h>
- #include <gpxe/io.h>
-
- #ifdef PCIAPI_DIRECT
- #define PCIAPI_PREFIX_direct
- #else
- #define PCIAPI_PREFIX_direct __direct_
- #endif
-
- /** @file
- *
- * PCI configuration space access via Type 1 accesses
- *
- */
-
- #define PCIDIRECT_CONFIG_ADDRESS 0xcf8
- #define PCIDIRECT_CONFIG_DATA 0xcfc
-
- struct pci_device;
-
- extern void pcidirect_prepare ( struct pci_device *pci, int where );
-
- /**
- * Determine maximum PCI bus number within system
- *
- * @ret max_bus Maximum bus number
- */
- static inline __always_inline int
- PCIAPI_INLINE ( direct, pci_max_bus ) ( void ) {
- /* No way to work this out via Type 1 accesses */
- return 0xff;
- }
-
- /**
- * Read byte from PCI configuration space via Type 1 access
- *
- * @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 ( direct, pci_read_config_byte ) ( struct pci_device *pci,
- unsigned int where,
- uint8_t *value ) {
- pcidirect_prepare ( pci, where );
- *value = inb ( PCIDIRECT_CONFIG_DATA + ( where & 3 ) );
- return 0;
- }
-
- /**
- * Read word from PCI configuration space via Type 1 access
- *
- * @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 ( direct, pci_read_config_word ) ( struct pci_device *pci,
- unsigned int where,
- uint16_t *value ) {
- pcidirect_prepare ( pci, where );
- *value = inw ( PCIDIRECT_CONFIG_DATA + ( where & 2 ) );
- return 0;
- }
-
- /**
- * Read dword from PCI configuration space via Type 1 access
- *
- * @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 ( direct, pci_read_config_dword ) ( struct pci_device *pci,
- unsigned int where,
- uint32_t *value ) {
- pcidirect_prepare ( pci, where );
- *value = inl ( PCIDIRECT_CONFIG_DATA );
- return 0;
- }
-
- /**
- * Write byte to PCI configuration space via Type 1 access
- *
- * @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 ( direct, pci_write_config_byte ) ( struct pci_device *pci,
- unsigned int where,
- uint8_t value ) {
- pcidirect_prepare ( pci, where );
- outb ( value, PCIDIRECT_CONFIG_DATA + ( where & 3 ) );
- return 0;
- }
-
- /**
- * Write word to PCI configuration space via Type 1 access
- *
- * @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 ( direct, pci_write_config_word ) ( struct pci_device *pci,
- unsigned int where,
- uint16_t value ) {
- pcidirect_prepare ( pci, where );
- outw ( value, PCIDIRECT_CONFIG_DATA + ( where & 2 ) );
- return 0;
- }
-
- /**
- * Write dword to PCI configuration space via Type 1 access
- *
- * @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 ( direct, pci_write_config_dword ) ( struct pci_device *pci,
- unsigned int where,
- uint32_t value ) {
- pcidirect_prepare ( pci, where );
- outl ( value, PCIDIRECT_CONFIG_DATA );
- return 0;
- }
-
- #endif /* _PCIDIRECT_H */
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