1 #ifndef _GPXE_PCIBIOS_H 2 #define _GPXE_PCIBIOS_H 3 4 #include <stdint.h> 5 6 /** @file 7 * 8 * PCI configuration space access via PCI BIOS 9 * 10 */ 11 12 FILE_LICENCE ( GPL2_OR_LATER ); 13 14 #ifdef PCIAPI_PCBIOS 15 #define PCIAPI_PREFIX_pcbios 16 #else 17 #define PCIAPI_PREFIX_pcbios __pcbios_ 18 #endif 19 20 struct pci_device; 21 22 #define PCIBIOS_INSTALLATION_CHECK 0xb1010000 23 #define PCIBIOS_READ_CONFIG_BYTE 0xb1080000 24 #define PCIBIOS_READ_CONFIG_WORD 0xb1090000 25 #define PCIBIOS_READ_CONFIG_DWORD 0xb10a0000 26 #define PCIBIOS_WRITE_CONFIG_BYTE 0xb10b0000 27 #define PCIBIOS_WRITE_CONFIG_WORD 0xb10c0000 28 #define PCIBIOS_WRITE_CONFIG_DWORD 0xb10d0000 29 30 extern int pcibios_read ( struct pci_device *pci, uint32_t command, 31 uint32_t *value ); 32 extern int pcibios_write ( struct pci_device *pci, uint32_t command, 33 uint32_t value ); 34 35 /** 36 * Read byte from PCI configuration space via PCI BIOS 37 * 38 * @v pci PCI device 39 * @v where Location within PCI configuration space 40 * @v value Value read 41 * @ret rc Return status code 42 */ 43 static inline __always_inline int 44 PCIAPI_INLINE ( pcbios, pci_read_config_byte ) ( struct pci_device *pci, 45 unsigned int where, 46 uint8_t *value ) { 47 uint32_t tmp; 48 int rc; 49 50 rc = pcibios_read ( pci, PCIBIOS_READ_CONFIG_BYTE | where, &tmp ); 51 *value = tmp; 52 return rc; 53 } 54 55 /** 56 * Read word from PCI configuration space via PCI BIOS 57 * 58 * @v pci PCI device 59 * @v where Location within PCI configuration space 60 * @v value Value read 61 * @ret rc Return status code 62 */ 63 static inline __always_inline int 64 PCIAPI_INLINE ( pcbios, pci_read_config_word ) ( struct pci_device *pci, 65 unsigned int where, 66 uint16_t *value ) { 67 uint32_t tmp; 68 int rc; 69 70 rc = pcibios_read ( pci, PCIBIOS_READ_CONFIG_WORD | where, &tmp ); 71 *value = tmp; 72 return rc; 73 } 74 75 /** 76 * Read dword from PCI configuration space via PCI BIOS 77 * 78 * @v pci PCI device 79 * @v where Location within PCI configuration space 80 * @v value Value read 81 * @ret rc Return status code 82 */ 83 static inline __always_inline int 84 PCIAPI_INLINE ( pcbios, pci_read_config_dword ) ( struct pci_device *pci, 85 unsigned int where, 86 uint32_t *value ) { 87 return pcibios_read ( pci, PCIBIOS_READ_CONFIG_DWORD | where, value ); 88 } 89 90 /** 91 * Write byte to PCI configuration space via PCI BIOS 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 ( pcbios, pci_write_config_byte ) ( struct pci_device *pci, 100 unsigned int where, 101 uint8_t value ) { 102 return pcibios_write ( pci, PCIBIOS_WRITE_CONFIG_BYTE | where, value ); 103 } 104 105 /** 106 * Write word to PCI configuration space via PCI BIOS 107 * 108 * @v pci PCI device 109 * @v where Location within PCI configuration space 110 * @v value Value to be written 111 * @ret rc Return status code 112 */ 113 static inline __always_inline int 114 PCIAPI_INLINE ( pcbios, pci_write_config_word ) ( struct pci_device *pci, 115 unsigned int where, 116 uint16_t value ) { 117 return pcibios_write ( pci, PCIBIOS_WRITE_CONFIG_WORD | where, value ); 118 } 119 120 /** 121 * Write dword to PCI configuration space via PCI BIOS 122 * 123 * @v pci PCI device 124 * @v where Location within PCI configuration space 125 * @v value Value to be written 126 * @ret rc Return status code 127 */ 128 static inline __always_inline int 129 PCIAPI_INLINE ( pcbios, pci_write_config_dword ) ( struct pci_device *pci, 130 unsigned int where, 131 uint32_t value ) { 132 return pcibios_write ( pci, PCIBIOS_WRITE_CONFIG_DWORD | where, value); 133 } 134 135 #endif /* _GPXE_PCIBIOS_H */ 136
