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add in the msr configuration 

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2206 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Ronald G. Minnich 2006-03-16 22:23:03 +00:00
parent ccce5dd490
commit ec5b166f41
1 changed files with 50 additions and 1 deletions
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49
src/northbridge/amd/gx2/northbridge.c
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@ -47,6 +47,14 @@ sizeram(void)
return sizem;
}
/* here is programming for the various MSRs.*/
#define IM_QWAIT 0x100000
#define DMCF_WRITE_SERIALIZE_REQUEST (2<<12) /* 2 outstanding */ /* in high */
#define DMCF_SERIAL_LOAD_MISSES (2) /* enabled */
/* these are the 8-bit attributes for controlling RCONF registers */
#define CACHE_DISABLE (1<<0)
#define WRITE_ALLOCATE (1<<1)
#define WRITE_PROTECT (1<<2)
@ -58,10 +66,43 @@ sizeram(void)
#define RAM_PROPERTIES (0)
#define DEVICE_PROPERTIES (WRITE_SERIALIZE|CACHE_DISABLE)
#define ROM_PROPERTIES (WRITE_SERIALIZE|WRITE_THROUGH|CACHE_DISABLE)
#define MSR_WS_CD_DEFAULT (0x21212121)
/* 1810-1817 give you 8 registers with which to program protection regions */
/* the are region configuration range registers, or RRCF */
/* in msr terms, the are a straight base, top address assign, since they are 4k aligned. */
/* so no left-shift needed for top or base */
#define RRCF_LOW(base,properties) (base|(1<<8)|properties)
#define RRCF_LOW_CD(base) RRCF_LOW(base, CACHE_DISABLE)
struct msr_defaults {
int msr_no;
msr_t msr;
} msr_defaults [] = {
{0x1700, {.hi = 0, .lo = IM_QWAIT}},
{0x1800, {.hi = DMCF_WRITE_SERIALIZE_REQUEST, .lo = DMCF_SERIAL_LOAD_MISSES}},
/* 1808 will be done down below, so we have to do 180a->1817 (well, 1813 really) */
/* for 180a, for now, we assume VSM will configure it */
/* 180b is left at reset value,a0000-bffff is non-cacheable */
/* 180c, c0000-dffff is set to write serialize and non-cachable */
{0x180c, {.hi = MSR_WS_CD_DEFAULT, .lo = MSR_WS_CD_DEFAULT}},
/* 180d is left at default, e0000-fffff is non-cached */
/* we will assume 180e, the ssm region configuration, is left at default or set by VSM */
/* we will not set 0x180f, the DMM,yet */
{0x1810, {.hi=0xee7ff000, .lo=RRCF_LOW(0xee000000, WRITE_COMBINE|CACHE_DISABLE)}},
{0x1811, {.hi = 0xefffb000, .lo = RRCF_LOW_CD(0xefff8000)}},
{0x1812, {.hi = 0xefff7000, .lo = RRCF_LOW_CD(0xefff4000)}},
{0x1813, {.hi = 0xefff3000, .lo = RRCF_LOW_CD(0xefff0000)}},
{0}
};
static void
setup_gx2_cache(int sizem)
{
int i;
msr_t msr;
unsigned long long val;
printk_debug("enable_cache: enable for %dm bytes\n", sizem);
@ -87,6 +128,14 @@ setup_gx2_cache(int sizem)
printk_debug("msr will be set to %x:%x\n", msr.hi, msr.lo);
wrmsr(0x1808, msr);
/* now do the default MSR values */
for(i = 0; msr_defaults[i].msr_no; i++) {
msr_t msr;
wrmsr(msr_defaults[i].msr_no, msr_defaults[i].msr);
msr = rdmsr(msr_defaults[i].msr_no);
printk_debug("MSR 0x%x is now 0x%x:0x%x\n", msr_defaults[i].msr_no, msr.hi,msr.lo);
}
enable_cache();
wbinvd();
}