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