1 #ifndef _PCIDIRECT_H 2 #define _PCIDIRECT_H 3 4 FILE_LICENCE ( GPL2_OR_LATER ); 5 6 #include <stdint.h> 7 #include <gpxe/io.h> 8 9 #ifdef PCIAPI_DIRECT 10 #define PCIAPI_PREFIX_direct 11 #else 12 #define PCIAPI_PREFIX_direct __direct_ 13 #endif 14 15 /** @file 16 * 17 * PCI configuration space access via Type 1 accesses 18 * 19 */ 20 21 #define PCIDIRECT_CONFIG_ADDRESS 0xcf8 22 #define PCIDIRECT_CONFIG_DATA 0xcfc 23 24 struct pci_device; 25 26 extern void pcidirect_prepare ( struct pci_device *pci, int where ); 27 28 /** 29 * Determine maximum PCI bus number within system 30 * 31 * @ret max_bus Maximum bus number 32 */ 33 static inline __always_inline int 34 PCIAPI_INLINE ( direct, pci_max_bus ) ( void ) { 35 /* No way to work this out via Type 1 accesses */ 36 return 0xff; 37 } 38 39 /** 40 * Read byte from PCI configuration space via Type 1 access 41 * 42 * @v pci PCI device 43 * @v where Location within PCI configuration space 44 * @v value Value read 45 * @ret rc Return status code 46 */ 47 static inline __always_inline int 48 PCIAPI_INLINE ( direct, pci_read_config_byte ) ( struct pci_device *pci, 49 unsigned int where, 50 uint8_t *value ) { 51 pcidirect_prepare ( pci, where ); 52 *value = inb ( PCIDIRECT_CONFIG_DATA + ( where & 3 ) ); 53 return 0; 54 } 55 56 /** 57 * Read word from PCI configuration space via Type 1 access 58 * 59 * @v pci PCI device 60 * @v where Location within PCI configuration space 61 * @v value Value read 62 * @ret rc Return status code 63 */ 64 static inline __always_inline int 65 PCIAPI_INLINE ( direct, pci_read_config_word ) ( struct pci_device *pci, 66 unsigned int where, 67 uint16_t *value ) { 68 pcidirect_prepare ( pci, where ); 69 *value = inw ( PCIDIRECT_CONFIG_DATA + ( where & 2 ) ); 70 return 0; 71 } 72 73 /** 74 * Read dword from PCI configuration space via Type 1 access 75 * 76 * @v pci PCI device 77 * @v where Location within PCI configuration space 78 * @v value Value read 79 * @ret rc Return status code 80 */ 81 static inline __always_inline int 82 PCIAPI_INLINE ( direct, pci_read_config_dword ) ( struct pci_device *pci, 83 unsigned int where, 84 uint32_t *value ) { 85 pcidirect_prepare ( pci, where ); 86 *value = inl ( PCIDIRECT_CONFIG_DATA ); 87 return 0; 88 } 89 90 /** 91 * Write byte to PCI configuration space via Type 1 access 92 * 93 * @v pci PCI device 94 * @v where Location within PCI configuration space 95 * @v value Value to be written 96 * @ret rc Return status code 97 */ 98 static inline __always_inline int 99 PCIAPI_INLINE ( direct, pci_write_config_byte ) ( struct pci_device *pci, 100 unsigned int where, 101 uint8_t value ) { 102 pcidirect_prepare ( pci, where ); 103 outb ( value, PCIDIRECT_CONFIG_DATA + ( where & 3 ) ); 104 return 0; 105 } 106 107 /** 108 * Write word to PCI configuration space via Type 1 access 109 * 110 * @v pci PCI device 111 * @v where Location within PCI configuration space 112 * @v value Value to be written 113 * @ret rc Return status code 114 */ 115 static inline __always_inline int 116 PCIAPI_INLINE ( direct, pci_write_config_word ) ( struct pci_device *pci, 117 unsigned int where, 118 uint16_t value ) { 119 pcidirect_prepare ( pci, where ); 120 outw ( value, PCIDIRECT_CONFIG_DATA + ( where & 2 ) ); 121 return 0; 122 } 123 124 /** 125 * Write dword to PCI configuration space via Type 1 access 126 * 127 * @v pci PCI device 128 * @v where Location within PCI configuration space 129 * @v value Value to be written 130 * @ret rc Return status code 131 */ 132 static inline __always_inline int 133 PCIAPI_INLINE ( direct, pci_write_config_dword ) ( struct pci_device *pci, 134 unsigned int where, 135 uint32_t value ) { 136 pcidirect_prepare ( pci, where ); 137 outl ( value, PCIDIRECT_CONFIG_DATA ); 138 return 0; 139 } 140 141 #endif /* _PCIDIRECT_H */ 142
