diff options
| -rw-r--r-- | util/flashrom/flash_enable.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/util/flashrom/flash_enable.c b/util/flashrom/flash_enable.c index dd53f0eb71..901144ca5f 100644 --- a/util/flashrom/flash_enable.c +++ b/util/flashrom/flash_enable.c @@ -77,7 +77,12 @@ static int enable_flash_sis630(struct pci_dev *dev, char *name) return 0; } -/* Datasheet: http://www.intel.com/design/intarch/datashts/290562.htm */ +/* Datasheet: + * - Name: 82371AB PCI-TO-ISA / IDE XCELERATOR (PIIX4) + * - URL: http://www.intel.com/design/intarch/datashts/290562.htm + * - PDF: http://www.intel.com/design/intarch/datashts/29056201.pdf + * - Order Number: 290562-001 + */ static int enable_flash_piix4(struct pci_dev *dev, char *name) { uint16_t old, new; @@ -90,10 +95,11 @@ static int enable_flash_piix4(struct pci_dev *dev, char *name) Set bit 7: Extended BIOS Enable (PCI master accesses to FFF80000-FFFDFFFF are forwarded to ISA). Set bit 6: Lower BIOS Enable (PCI master, or ISA master accesses to - the lower 64-Kbyte BIOS block (E00000EFFFF) at the top + the lower 64-Kbyte BIOS block (E0000-EFFFF) at the top of 1 Mbyte, or the aliases at the top of 4 Gbyte - (FFFE0000-FFFEFFF) result in the generation of BIOSCS#. - Set bit 2: BIOSCS# Write Protect Enable (1=enable, 0=disable). */ + (FFFE0000-FFFEFFFF) result in the generation of BIOSCS#. + Note: Accesses to FFFF0000-FFFFFFFF are always forwarded to ISA. + Set bit 2: BIOSCS# Write Enable (1=enable, 0=disable). */ new = old | 0x2c4; if (new == old) |