Make MTRR min hole alignment 64MB
This affects the algorithm when determining when to transform a range into a larger range with a hole. It is needed when for when I switch on an 8MB TSEG and cause the memory maps to go crazy. Also add header defines for the SMRR. Change-Id: I1a06ccc28ef139cc79f655a8b19fd3533aca0401 Signed-off-by: Duncan Laurie <dlaurie@google.com> Reviewed-on: http://review.coreboot.org/765 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
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@ -265,13 +265,16 @@ static unsigned int range_to_mtrr(unsigned int reg,
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return reg;
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return reg;
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}
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}
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if (above4gb == 2 && type == MTRR_TYPE_WRBACK && range_sizek % 0x4000) {
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#define MIN_ALIGN 0x10000 /* 64MB */
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if (above4gb == 2 && type == MTRR_TYPE_WRBACK &&
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range_sizek > MIN_ALIGN && range_sizek % MIN_ALIGN) {
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/*
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/*
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* If this range is not divisible by 16MB then instead
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* If this range is not divisible then instead
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* make a larger range and carve out an uncached hole.
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* make a larger range and carve out an uncached hole.
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*/
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*/
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hole_startk = range_startk + range_sizek;
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hole_startk = range_startk + range_sizek;
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hole_sizek = 0x4000 - (range_sizek % 0x4000);
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hole_sizek = MIN_ALIGN - (range_sizek % MIN_ALIGN);
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range_sizek += hole_sizek;
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range_sizek += hole_sizek;
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}
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}
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@ -17,6 +17,9 @@
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#define MTRRdefTypeEn (1 << 11)
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#define MTRRdefTypeEn (1 << 11)
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#define MTRRdefTypeFixEn (1 << 10)
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#define MTRRdefTypeFixEn (1 << 10)
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#define SMRRphysBase_MSR 0x1f2
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#define SMRRphysMask_MSR 0x1f3
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#define MTRRphysBase_MSR(reg) (0x200 + 2 * (reg))
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#define MTRRphysBase_MSR(reg) (0x200 + 2 * (reg))
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#define MTRRphysMask_MSR(reg) (0x200 + 2 * (reg) + 1)
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#define MTRRphysMask_MSR(reg) (0x200 + 2 * (reg) + 1)
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