| #ifndef _PCIDIRECT_H |
| #define _PCIDIRECT_H |
| |
| FILE_LICENCE ( GPL2_OR_LATER ); |
| |
| #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 */ |