pcibackup.c File Reference

PCI configuration space backup and restoration. More...

#include <stdint.h>
#include <ipxe/pci.h>
#include <ipxe/pcibackup.h>

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
static int	pci_backup_excluded (struct pci_device *pci, unsigned int offset, const uint8_t *exclude)
	Check PCI configuration space offset against exclusion list. More...
void	pci_backup (struct pci_device *pci, struct pci_config_backup *backup, unsigned int limit, const uint8_t *exclude)
	Back up PCI configuration space. More...
void	pci_restore (struct pci_device *pci, struct pci_config_backup *backup, unsigned int limit, const uint8_t *exclude)
	Restore PCI configuration space. More...

Detailed Description

PCI configuration space backup and restoration.

Definition in file pcibackup.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

pci_backup_excluded()

static int pci_backup_excluded ( struct pci_device *  pci, unsigned int  offset, const uint8_t *  exclude  )

static

Check PCI configuration space offset against exclusion list.

Parameters

pci	PCI device
offset	Offset within PCI configuration space
exclude	PCI configuration space backup exclusion list, or NULL

Definition at line 44 of file pcibackup.c.

                                               {

        if ( ! exclude )
                return 0;
        for ( ; *exclude != PCI_CONFIG_BACKUP_EXCLUDE_END ; exclude++ ) {
                if ( offset == *exclude ) {
                        DBGC ( pci, "PCI %p skipping configuration offset "
                               "%02x\n", pci, offset );
                        return 1;
                }
        }
        return 0;
}

References DBGC, offset, and PCI_CONFIG_BACKUP_EXCLUDE_END.

Referenced by pci_backup(), and pci_restore().

pci_backup()

void pci_backup	(	struct pci_device *	pci,
		struct pci_config_backup *	backup,
		unsigned int	limit,
		const uint8_t *	exclude
	)

Back up PCI configuration space.

Parameters

pci	PCI device
backup	PCI configuration space backup
limit	Maximum offset in PCI configuration space
exclude	PCI configuration space backup exclusion list, or NULL

Definition at line 67 of file pcibackup.c.

                                                               {
        unsigned int offset;
        uint32_t *dword;

        for ( offset = 0, dword = backup->dwords ; offset < limit ;
              offset += sizeof ( *dword ) , dword++ ) {
                if ( ! pci_backup_excluded ( pci, offset, exclude ) )
                        pci_read_config_dword ( pci, offset, dword );
        }
}

References pci_config_backup::dwords, limit, offset, pci_backup_excluded(), and pci_read_config_dword().

Referenced by arbel_reset(), hermon_reset(), pci_reset(), and qib7322_reset().

pci_restore()

void pci_restore	(	struct pci_device *	pci,
		struct pci_config_backup *	backup,
		unsigned int	limit,
		const uint8_t *	exclude
	)

Restore PCI configuration space.

Parameters

pci	PCI device
backup	PCI configuration space backup
limit	Maximum offset in PCI configuration space
exclude	PCI configuration space backup exclusion list, or NULL

Definition at line 87 of file pcibackup.c.

                                                                {
        unsigned int offset;
        uint32_t *dword;

        for ( offset = 0, dword = backup->dwords ; offset < limit ;
              offset += sizeof ( *dword ) , dword++ ) {
                if ( ! pci_backup_excluded ( pci, offset, exclude ) )
                        pci_write_config_dword ( pci, offset, *dword );
        }
}

References pci_config_backup::dwords, limit, offset, pci_backup_excluded(), and pci_write_config_dword().

Referenced by arbel_reset(), hermon_reset(), pci_reset(), and qib7322_reset().