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- First pass at code for generic link width and size determination

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git-svn-id: svn://svn.coreboot.org/coreboot/trunk@999 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Eric Biederman
2003-07-21 23:30:29 +00:00
parent 2c018fba95
commit 860ad373ef
4 changed files with 198 additions and 33 deletions
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22
src/southbridge/amd/amd8131/amd8131_bridge.c
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@@ -9,6 +9,28 @@
static void pcix_init(device_t dev)
{
uint16_t word;
uint8_t byte;
/* Enable memory write and invalidate ??? */
byte = pci_read_config8(dev, 0x04);
byte |= 0x10;
pci_write_config8(dev, 0x04, byte);
/* Set drive strength */
word = pci_read_config16(dev, 0xe0);
word = 0x0404;
pci_write_config16(dev, 0xe0, word);
word = pci_read_config16(dev, 0xe4);
word = 0x0404;
pci_write_config16(dev, 0xe4, word);
/* Set impedance */
word = pci_read_config16(dev, 0xe8);
word = 0x0404;
pci_write_config16(dev, 0xe8, word);
return;
}