pcibackup.c File Reference

PCI configuration space backup and restoration. More...

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

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER)
static int	pci_backup_excluded (struct pci_device *pci, unsigned int offset, const uint8_t *exclude)
	Check PCI configuration space offset against exclusion list.
void	pci_backup (struct pci_device *pci, struct pci_config_backup *backup, const uint8_t *exclude)
	Back up PCI configuration space.
void	pci_restore (struct pci_device *pci, struct pci_config_backup *backup, const uint8_t *exclude)
	Restore PCI configuration space.

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Detailed Description

PCI configuration space backup and restoration.

Definition in file pcibackup.c.

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Function Documentation

FILE_LICENCE

(

GPL2_OR_LATER

)

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 39 of file pcibackup.c.

References DBGC, and PCI_CONFIG_BACKUP_EXCLUDE_END.

Referenced by pci_backup(), and pci_restore().

                                               {

        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;
}

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

Back up PCI configuration space.

Parameters:

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

Definition at line 61 of file pcibackup.c.

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

Referenced by hermon_reset().

                                           {
        unsigned int offset;
        uint32_t *dword;

        for ( offset = 0, dword = backup->dwords ; offset < 0x100 ;
              offset += sizeof ( *dword ) , dword++ ) {
                if ( ! pci_backup_excluded ( pci, offset, exclude ) )
                        pci_read_config_dword ( pci, offset, dword );
        }
}

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

Restore PCI configuration space.

Parameters:

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

Definition at line 80 of file pcibackup.c.

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

Referenced by hermon_reset().

                                            {
        unsigned int offset;
        uint32_t *dword;

        for ( offset = 0, dword = backup->dwords ; offset < 0x100 ;
              offset += sizeof ( *dword ) , dword++ ) {
                if ( ! pci_backup_excluded ( pci, offset, exclude ) )
                        pci_write_config_dword ( pci, offset, *dword );
        }
}