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Prepare for next patches (Improving BKDG implementation of P-states, 

CPU and northbridge frequency and voltage
handling for Fam 10 in SVI mode). No change of behaviour intended.

Refactor FAM10 fidvid . prep_fid_change was already long and it'd
get longer with forthcoming patches. We now take apart VSRamp in step b
of 2.4.1.7 BKDG to its own function.

Signed-off-by: Xavi Drudis Ferran <xdrudis@tinet.cat>
Acked-by: Marc Jones <marcj303@gmail.com>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6387 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Xavi Drudis Ferran 2011-02-27 23:42:58 +00:00 committed by Marc Jones
parent 70a3733155
commit d729459621
1 changed files with 17 additions and 5 deletions
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22
src/cpu/amd/model_10xxx/fidvid.c
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@ -66,6 +66,21 @@ static void enable_fid_change(u8 fid)
}
}
static void setVSRamp(device_t dev) {
/* BKDG r31116 2010-04-22 2.4.1.7 step b F3xD8[VSRampTime]
* If this field accepts 8 values between 10 and 500 us why
* does page 324 say "BIOS should set this field to 001b."
* (20 us) ?
* Shouldn't it depend on the voltage regulators, mainboard
* or something ?
*/
u32 dword;
dword = pci_read_config32(dev, 0xd8);
dword &= VSRAMP_MASK;
dword |= VSRAMP_VALUE;
pci_write_config32(dev, 0xd8, dword);
}
static void recalculateVsSlamTimeSettingOnCorePre(device_t dev)
{
u8 pviModeFlag;
@ -179,11 +194,8 @@ static void prep_fid_change(void)
printk(BIOS_DEBUG, "Prep FID/VID Node:%02x \n", i);
dev = NODE_PCI(i, 3);
dword = pci_read_config32(dev, 0xd8);
dword &= VSRAMP_MASK;
dword |= VSRAMP_VALUE;
pci_write_config32(dev, 0xd8, dword);
setVSRamp(dev);
/* BKDG r31116 2010-04-22 2.4.1.7 step b F3xD8[VSSlamTime] */
/* Figure out the value for VsSlamTime and program it */
recalculateVsSlamTimeSettingOnCorePre(dev);