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[pci] Allow PCI config space backup to be limited by maximum offset

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2022-11-13 20:42:09 +00:00
parent 688646fe6d
commit ca2be7e094
5 changed files with 22 additions and 13 deletions
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src/drivers/bus/pcibackup.c
+6 -4
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@@ -61,14 +61,15 @@ pci_backup_excluded ( struct pci_device *pci, unsigned int offset,
*
* @v pci PCI device
* @v backup PCI configuration space backup
* @v limit Maximum offset in PCI configuration space
* @v exclude PCI configuration space backup exclusion list, or NULL
*/
void pci_backup ( struct pci_device *pci, struct pci_config_backup *backup,
const uint8_t *exclude ) {
unsigned int limit, const uint8_t *exclude ) {
unsigned int offset;
uint32_t *dword;
for ( offset = 0, dword = backup->dwords ; offset < 0x100 ;
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 );
@@ -80,14 +81,15 @@ void pci_backup ( struct pci_device *pci, struct pci_config_backup *backup,
*
* @v pci PCI device
* @v backup PCI configuration space backup
* @v limit Maximum offset in PCI configuration space
* @v exclude PCI configuration space backup exclusion list, or NULL
*/
void pci_restore ( struct pci_device *pci, struct pci_config_backup *backup,
const uint8_t *exclude ) {
unsigned int limit, const uint8_t *exclude ) {
unsigned int offset;
uint32_t *dword;
for ( offset = 0, dword = backup->dwords ; offset < 0x100 ;
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 );