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-rw-r--r--flash_enable.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/flash_enable.c b/flash_enable.c
index dd53f0eb..901144ca 100644
--- a/flash_enable.c
+++ b/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)