pcibios.h File Reference

PCI configuration space access via PCI BIOS. More...

#include <stdint.h>

Go to the source code of this file.

Macros
#define	PCIAPI_PREFIX_pcbios   __pcbios_
#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

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
	FILE_SECBOOT (PERMITTED)
int	pcibios_read (struct pci_device *pci, uint32_t command, uint32_t *value)
	Read configuration space via PCI BIOS.
int	pcibios_write (struct pci_device *pci, uint32_t command, uint32_t value)
	Write configuration space via PCI BIOS.
static __always_inline int	PCIAPI_INLINE (pcbios, pci_can_probe)(struct pci_device *pci __unused)
	Check if PCI bus probing is allowed.
static __always_inline int	PCIAPI_INLINE (pcbios, pci_read_config_byte)(struct pci_device *pci
	Read byte from PCI configuration space via PCI BIOS.
static __always_inline int	PCIAPI_INLINE (pcbios, pci_read_config_word)(struct pci_device *pci
	Read word from PCI configuration space via PCI BIOS.
static __always_inline int	PCIAPI_INLINE (pcbios, pci_read_config_dword)(struct pci_device *pci
	Read dword from PCI configuration space via PCI BIOS.
static __always_inline int	PCIAPI_INLINE (pcbios, pci_write_config_byte)(struct pci_device *pci
	Write byte to PCI configuration space via PCI BIOS.
static __always_inline int	PCIAPI_INLINE (pcbios, pci_write_config_word)(struct pci_device *pci
	Write word to PCI configuration space via PCI BIOS.
static __always_inline int	PCIAPI_INLINE (pcbios, pci_write_config_dword)(struct pci_device *pci
	Write dword to PCI configuration space via PCI BIOS.
static __always_inline void *	PCIAPI_INLINE (pcbios, pci_ioremap)(struct pci_device *pci __unused
	Map PCI bus address as an I/O address.

Variables
static __always_inline int unsigned int	where
static __always_inline int unsigned int uint8_t *	value
int	rc = pcibios_read ( pci, PCIBIOS_READ_CONFIG_BYTE | where, &tmp )
static __always_inline void unsigned long	bus_addr
static __always_inline void unsigned long size_t	len

Detailed Description

PCI configuration space access via PCI BIOS.

Definition in file pcibios.h.

Macro Definition Documentation

PCIAPI_PREFIX_pcbios

#define PCIAPI_PREFIX_pcbios   __pcbios_

Definition at line 18 of file pcibios.h.

PCIBIOS_INSTALLATION_CHECK

#define PCIBIOS_INSTALLATION_CHECK   0xb1010000

Definition at line 23 of file pcibios.h.

Referenced by pcibios_discover().

PCIBIOS_READ_CONFIG_BYTE

#define PCIBIOS_READ_CONFIG_BYTE   0xb1080000

Definition at line 24 of file pcibios.h.

PCIBIOS_READ_CONFIG_WORD

#define PCIBIOS_READ_CONFIG_WORD   0xb1090000

Definition at line 25 of file pcibios.h.

Referenced by PCIAPI_INLINE().

PCIBIOS_READ_CONFIG_DWORD

#define PCIBIOS_READ_CONFIG_DWORD   0xb10a0000

Definition at line 26 of file pcibios.h.

Referenced by PCIAPI_INLINE().

PCIBIOS_WRITE_CONFIG_BYTE

#define PCIBIOS_WRITE_CONFIG_BYTE   0xb10b0000

Definition at line 27 of file pcibios.h.

Referenced by PCIAPI_INLINE().

PCIBIOS_WRITE_CONFIG_WORD

#define PCIBIOS_WRITE_CONFIG_WORD   0xb10c0000

Definition at line 28 of file pcibios.h.

Referenced by PCIAPI_INLINE().

PCIBIOS_WRITE_CONFIG_DWORD

#define PCIBIOS_WRITE_CONFIG_DWORD   0xb10d0000

Definition at line 29 of file pcibios.h.

Referenced by PCIAPI_INLINE().

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

FILE_SECBOOT()

FILE_SECBOOT

(

PERMITTED

)

pcibios_read()

int pcibios_read ( struct pci_device * pci, uint32_t command, uint32_t * value )

extern

Read configuration space via PCI BIOS.

Parameters

pci	PCI device
command	PCI BIOS command
value	Value read

Return values

rc	Return status code

Definition at line 77 of file pcibios.c.

                                                                              {
        int discard_b, discard_D;
        uint16_t status;
 
        __asm__ __volatile__ ( REAL_CODE ( "stc\n\t"
                                           "int $0x1a\n\t"
                                           "jnc 1f\n\t"
                                           "xorl %%eax, %%eax\n\t"
                                           "decl %%eax\n\t"
                                           "movl %%eax, %%ecx\n\t"
                                           "\n1:\n\t" )
                               : "=a" ( status ), "=b" ( discard_b ),
                                 "=c" ( *value ), "=D" ( discard_D )
                               : "a" ( command >> 16 ), "D" ( command ),
                                 "b" ( pci->busdevfn )
                               : "edx" );
 
        return ( status >> 8 );
}

References __asm__(), __volatile__(), pci_device::busdevfn, discard_D, REAL_CODE, status, and value.

Referenced by PCIAPI_INLINE(), and PCIAPI_INLINE().

pcibios_write()

int pcibios_write ( struct pci_device * pci, uint32_t command, uint32_t value )

extern

Write configuration space via PCI BIOS.

Parameters

pci	PCI device
command	PCI BIOS command
value	Value to be written

Return values

rc	Return status code

Definition at line 105 of file pcibios.c.

                                                                              {
        int discard_b, discard_c, discard_D;
        uint16_t status;
 
        __asm__ __volatile__ ( REAL_CODE ( "stc\n\t"
                                           "int $0x1a\n\t"
                                           "jnc 1f\n\t"
                                           "movb $0xff, %%ah\n\t"
                                           "\n1:\n\t" )
                               : "=a" ( status ), "=b" ( discard_b ),
                                 "=c" ( discard_c ), "=D" ( discard_D )
                               : "a" ( command >> 16 ),  "D" ( command ),
                                 "b" ( pci->busdevfn ), "c" ( value )
                               : "edx" );
        
        return ( status >> 8 );
}

References __asm__(), __volatile__(), pci_device::busdevfn, discard_c, discard_D, REAL_CODE, status, and value.

Referenced by PCIAPI_INLINE(), PCIAPI_INLINE(), and PCIAPI_INLINE().

PCIAPI_INLINE() [1/8]

__always_inline int PCIAPI_INLINE ( pcbios , pci_can_probe  )

inlinestatic

Check if PCI bus probing is allowed.

Parameters

pci	PCI device

Return values

ok	Bus probing is allowed

Definition at line 43 of file pcibios.h.

                                                                            {
        return 1;
}

References __unused, and pci_can_probe().

PCIAPI_INLINE() [2/8]

__always_inline int PCIAPI_INLINE ( pcbios , pci_read_config_byte  )

inlinestatic

Read byte from PCI configuration space via PCI BIOS.

Parameters

pci	PCI device
where	Location within PCI configuration space
value	Value read

Return values

rc	Return status code

References pci_read_config_byte().

PCIAPI_INLINE() [3/8]

__always_inline int PCIAPI_INLINE ( pcbios , pci_read_config_word  )

inlinestatic

Read word from PCI configuration space via PCI BIOS.

Parameters

pci	PCI device
where	Location within PCI configuration space
value	Value read

Return values

rc	Return status code

References pci_read_config_word(), pcibios_read(), PCIBIOS_READ_CONFIG_WORD, rc, tmp, value, and where.

PCIAPI_INLINE() [4/8]

__always_inline int PCIAPI_INLINE ( pcbios , pci_read_config_dword  )

inlinestatic

Read dword from PCI configuration space via PCI BIOS.

Parameters

pci	PCI device
where	Location within PCI configuration space
value	Value read

Return values

rc	Return status code

References pci_read_config_dword(), pcibios_read(), PCIBIOS_READ_CONFIG_DWORD, value, and where.

PCIAPI_INLINE() [5/8]

__always_inline int PCIAPI_INLINE ( pcbios , pci_write_config_byte  )

inlinestatic

Write byte to PCI configuration space via PCI BIOS.

Parameters

pci	PCI device
where	Location within PCI configuration space
value	Value to be written

Return values

rc	Return status code

References pci_write_config_byte(), pcibios_write(), PCIBIOS_WRITE_CONFIG_BYTE, value, and where.

PCIAPI_INLINE() [6/8]

__always_inline int PCIAPI_INLINE ( pcbios , pci_write_config_word  )

inlinestatic

Write word to PCI configuration space via PCI BIOS.

Parameters

pci	PCI device
where	Location within PCI configuration space
value	Value to be written

Return values

rc	Return status code

References pci_write_config_word(), pcibios_write(), PCIBIOS_WRITE_CONFIG_WORD, value, and where.

PCIAPI_INLINE() [7/8]

__always_inline int PCIAPI_INLINE ( pcbios , pci_write_config_dword  )

inlinestatic

Write dword to PCI configuration space via PCI BIOS.

Parameters

pci	PCI device
where	Location within PCI configuration space
value	Value to be written

Return values

rc	Return status code

References pci_write_config_dword(), pcibios_write(), PCIBIOS_WRITE_CONFIG_DWORD, value, and where.

PCIAPI_INLINE() [8/8]

__always_inline void * PCIAPI_INLINE ( pcbios , pci_ioremap  )

inlinestatic

Map PCI bus address as an I/O address.

Parameters

bus_addr	PCI bus address
len	Length of region

Return values

io_addr

I/O address, or NULL on error

References __unused, and pci_ioremap().

Variable Documentation

where

__always_inline int unsigned int where

Definition at line 57 of file pcibios.h.

Referenced by ecam_read(), ecam_write(), efipci_read(), efipci_read(), efipci_read(), linux_pci_read(), linux_pci_write(), outb(), outw(), pci_read_config_byte(), pci_read_config_dword(), pci_read_config_word(), pci_write_config_byte(), pci_write_config_dword(), pci_write_config_word(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), PCIAPI_INLINE(), pcicloud_read_config_byte(), pcicloud_read_config_dword(), pcicloud_read_config_word(), pcicloud_write_config_byte(), pcicloud_write_config_dword(), pcicloud_write_config_word(), and pcidirect_prepare().

value

__always_inline int unsigned int uint32_t value

Initial value:

{
        uint32_t tmp

Definition at line 58 of file pcibios.h.

rc

return rc = pcibios_read ( pci, PCIBIOS_READ_CONFIG_BYTE | where, &tmp )

Definition at line 60 of file pcibios.h.

bus_addr

__always_inline void unsigned long bus_addr

Definition at line 156 of file pcibios.h.

Referenced by bus_to_phys(), bus_to_virt(), efipci_ioremap(), IOAPI_INLINE(), ioremap(), ioremap_pages(), pci_ioremap(), PCIAPI_INLINE(), and pcicloud_ioremap().

len

__always_inline void unsigned long size_t len

Initial value:

{
        return ioremap ( bus_addr, len )

Definition at line 156 of file pcibios.h.