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from issue 53: don't set TOM2 if 4G less mem installed, opt for init_ecc

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git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2144 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Yinghai Lu
2005-12-14 20:16:49 +00:00
parent 6f63c0297c
commit 30576601f6
3 changed files with 75 additions and 50 deletions
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8
src/northbridge/amd/amdk8/raminit.c
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@@ -882,9 +882,11 @@ static void set_top_mem(unsigned tom_k, unsigned hole_startk)
/* Now set top of memory */
msr_t msr;
msr.lo = (tom_k & 0x003fffff) << 10;
msr.hi = (tom_k & 0xffc00000) >> 22;
wrmsr(TOP_MEM2, msr);
if(tom_k>(4*1024*1024)) {
msr.lo = (tom_k & 0x003fffff) << 10;
msr.hi = (tom_k & 0xffc00000) >> 22;
wrmsr(TOP_MEM2, msr);
}
/* Leave a 64M hole between TOP_MEM and TOP_MEM2
* so I can see my rom chip and other I/O devices.