iPXE
Functions
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.
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.

Detailed Description

PCI configuration space backup and restoration.

Definition in file pcibackup.c.


Function Documentation

FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL  )
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:
pciPCI device
offsetOffset within PCI configuration space
excludePCI configuration space backup exclusion list, or NULL

Definition at line 44 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:
pciPCI device
backupPCI configuration space backup
excludePCI configuration space backup exclusion list, or NULL

Definition at line 66 of file pcibackup.c.

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

Referenced by arbel_reset(), hermon_reset(), and qib7322_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:
pciPCI device
backupPCI configuration space backup
excludePCI configuration space backup exclusion list, or NULL

Definition at line 85 of file pcibackup.c.

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

Referenced by arbel_reset(), hermon_reset(), and qib7322_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 );
        }
}