1 #ifndef _IPXE_PCIBIOS_H
2 #define _IPXE_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_OR_UBDL );
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
PCIAPI_INLINE(pcbios,pci_read_config_byte)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
PCIAPI_INLINE(pcbios,pci_read_config_word)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
PCIAPI_INLINE(pcbios,pci_read_config_dword)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
PCIAPI_INLINE(pcbios,pci_write_config_byte)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
PCIAPI_INLINE(pcbios,pci_write_config_word)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
PCIAPI_INLINE(pcbios,pci_write_config_dword)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 /**
136 * Map PCI bus address as an I/O address
137 *
138 * @v bus_addr PCI bus address
139 * @v len Length of region
140 * @ret io_addr I/O address, or NULL on error
141 */
142 static inline __always_inline void *
PCIAPI_INLINE(pcbios,pci_ioremap)143 PCIAPI_INLINE ( pcbios, pci_ioremap ) ( struct pci_device *pci __unused,
144 unsigned long bus_addr, size_t len ) {
145 return ioremap ( bus_addr, len );
146 }
147
148 #endif /* _IPXE_PCIBIOS_H */
149