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123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
#ifndef _PCIBIOS_H
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#define _PCIBIOS_H
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#include <stdint.h>
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/** @file
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*
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* PCI configuration space access via PCI BIOS
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*
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*/
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struct pci_device;
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#define PCIBIOS_INSTALLATION_CHECK 0xb1010000
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#define PCIBIOS_READ_CONFIG_BYTE 0xb1080000
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#define PCIBIOS_READ_CONFIG_WORD 0xb1090000
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#define PCIBIOS_READ_CONFIG_DWORD 0xb10a0000
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#define PCIBIOS_WRITE_CONFIG_BYTE 0xb10b0000
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#define PCIBIOS_WRITE_CONFIG_WORD 0xb10c0000
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#define PCIBIOS_WRITE_CONFIG_DWORD 0xb10d0000
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extern int pcibios_max_bus ( void );
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extern int pcibios_read ( struct pci_device *pci, uint32_t command,
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uint32_t *value );
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extern int pcibios_write ( struct pci_device *pci, uint32_t command,
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uint32_t value );
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/**
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* Read byte from PCI configuration space via PCI BIOS
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*
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* @v pci PCI device
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* @v where Location within PCI configuration space
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* @v value Value read
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* @ret rc Return status code
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*/
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static inline __attribute__ (( always_inline )) int
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pcibios_read_config_byte ( struct pci_device *pci, unsigned int where,
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uint8_t *value ) {
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uint32_t tmp;
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int rc;
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rc = pcibios_read ( pci, PCIBIOS_READ_CONFIG_BYTE | where, &tmp );
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*value = tmp;
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return rc;
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}
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/**
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* Read word from PCI configuration space via PCI BIOS
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*
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* @v pci PCI device
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* @v where Location within PCI configuration space
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* @v value Value read
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* @ret rc Return status code
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*/
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static inline __attribute__ (( always_inline )) int
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pcibios_read_config_word ( struct pci_device *pci, unsigned int where,
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uint16_t *value ) {
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uint32_t tmp;
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int rc;
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rc = pcibios_read ( pci, PCIBIOS_READ_CONFIG_WORD | where, &tmp );
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*value = tmp;
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return rc;
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}
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/**
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* Read dword from PCI configuration space via PCI BIOS
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*
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* @v pci PCI device
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* @v where Location within PCI configuration space
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* @v value Value read
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* @ret rc Return status code
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*/
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static inline __attribute__ (( always_inline )) int
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pcibios_read_config_dword ( struct pci_device *pci, unsigned int where,
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uint32_t *value ) {
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return pcibios_read ( pci, PCIBIOS_READ_CONFIG_DWORD | where, value );
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}
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/**
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* Write byte to PCI configuration space via PCI BIOS
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*
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* @v pci PCI device
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* @v where Location within PCI configuration space
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* @v value Value to be written
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* @ret rc Return status code
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*/
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static inline __attribute__ (( always_inline )) int
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pcibios_write_config_byte ( struct pci_device *pci, unsigned int where,
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uint8_t value ) {
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return pcibios_write ( pci, PCIBIOS_WRITE_CONFIG_BYTE | where, value );
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}
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/**
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* Write word to PCI configuration space via PCI BIOS
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*
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* @v pci PCI device
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* @v where Location within PCI configuration space
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* @v value Value to be written
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* @ret rc Return status code
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*/
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static inline __attribute__ (( always_inline )) int
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pcibios_write_config_word ( struct pci_device *pci, unsigned int where,
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uint16_t value ) {
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return pcibios_write ( pci, PCIBIOS_WRITE_CONFIG_WORD | where, value );
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}
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/**
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* Write dword to PCI configuration space via PCI BIOS
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*
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* @v pci PCI device
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* @v where Location within PCI configuration space
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* @v value Value to be written
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* @ret rc Return status code
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*/
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static inline __attribute__ (( always_inline )) int
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pcibios_write_config_dword ( struct pci_device *pci, unsigned int where,
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uint32_t value ) {
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return pcibios_write ( pci, PCIBIOS_WRITE_CONFIG_DWORD | where, value);
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}
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#endif /* _PCIBIOS_H */
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