diff options
| author | Uwe Hermann <uwe@hermann-uwe.de> | 2006-11-07 11:16:21 +0000 |
|---|---|---|
| committer | Uwe Hermann <uwe@hermann-uwe.de> | 2006-11-07 11:16:21 +0000 |
| commit | c65113cec7c628ab55f71114db5b13b2f2967db4 (patch) | |
| tree | b562a7027d17ee2039a86260b4c2d9574694247a /util/flashrom | |
| parent | 10fd79ae81fc97bded227ec587acfcdc895539db (diff) | |
Fix some code comments of the Intel PIIX4/PIIX4E/PIIX4M code.
Add detailed instructions on how and where to get the datasheet,
its name, and order number (Closes #34).
Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2493 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'util/flashrom')
| -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) |