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| author | Dave Frodin <dave.frodin@se-eng.com> | 2012-08-21 16:51:33 -0600 |
|---|---|---|
| committer | Anton Kochkov <anton.kochkov@gmail.com> | 2012-08-27 15:57:18 +0200 |
| commit | 3780597cc31422dd54e385cdb508ab30467fdd51 (patch) | |
| tree | 97ae2f33f64471b96913fe064815360057de15f4 /src | |
| parent | cc6019879d7f7f7d4a9d9dba358349f0752af583 (diff) | |
| download | coreboot-3780597cc31422dd54e385cdb508ab30467fdd51.tar.xz | |
SB700/SP5100: This configures the HPET clock period.
Prior to this change the setting would be zeroes and
would cause a BSOD in 64 bit versions of Windows.
Change-Id: I2d422ef9667457af53f9fd055799e489ed2b25db
Signed-off-by: Dave Frodin <dave.frodin@se-eng.com>
Reviewed-on: http://review.coreboot.org/1475
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Anton Kochkov <anton.kochkov@gmail.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/southbridge/amd/sb700/early_setup.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/southbridge/amd/sb700/early_setup.c b/src/southbridge/amd/sb700/early_setup.c index c890ad90d3..648b0d9d78 100644 --- a/src/southbridge/amd/sb700/early_setup.c +++ b/src/southbridge/amd/sb700/early_setup.c @@ -420,6 +420,14 @@ static void sb700_devices_por_init(void) byte |= 0x24; pci_write_config8(dev, 0x62, byte); + /* Configure HPET Counter CLK period */ + byte = pci_read_config8(dev, 0x43); + byte &= 0xF7; /* unhide HPET regs */ + pci_write_config8(dev, 0x43, byte); + pci_write_config32(dev, 0x34, 0x0429B17E ); /* Counter CLK period */ + byte |= 0x08; /* hide HPET regs */ + pci_write_config8(dev, 0x43, byte); + /* Features Enable */ pci_write_config32(dev, 0x64, 0x829E79BF); /* bit10: Enables the HPET interrupt. */ |