Stefan Reinauer ([email protected]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/765
-gerrit commit 8819294696d2d2aa89bf760a9b8529991255f6fd Author: Duncan Laurie <[email protected]> Date: Mon Jan 9 22:05:18 2012 -0800 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 <[email protected]> --- src/cpu/x86/mtrr/mtrr.c | 9 ++++++--- src/include/cpu/x86/mtrr.h | 3 +++ 2 files changed, 9 insertions(+), 3 deletions(-) diff --git a/src/cpu/x86/mtrr/mtrr.c b/src/cpu/x86/mtrr/mtrr.c index 5f5e02b..ed7d93b 100644 --- a/src/cpu/x86/mtrr/mtrr.c +++ b/src/cpu/x86/mtrr/mtrr.c @@ -265,13 +265,16 @@ static unsigned int range_to_mtrr(unsigned int reg, return reg; } - if (above4gb == 2 && type == MTRR_TYPE_WRBACK && range_sizek % 0x4000) { +#define MIN_ALIGN 0x10000 /* 64MB */ + + if (above4gb == 2 && type == MTRR_TYPE_WRBACK && + range_sizek > MIN_ALIGN && range_sizek % MIN_ALIGN) { /* - * If this range is not divisible by 16MB then instead + * If this range is not divisible then instead * make a larger range and carve out an uncached hole. */ hole_startk = range_startk + range_sizek; - hole_sizek = 0x4000 - (range_sizek % 0x4000); + hole_sizek = MIN_ALIGN - (range_sizek % MIN_ALIGN); range_sizek += hole_sizek; } diff --git a/src/include/cpu/x86/mtrr.h b/src/include/cpu/x86/mtrr.h index 62cb8b7..8b5cc28 100644 --- a/src/include/cpu/x86/mtrr.h +++ b/src/include/cpu/x86/mtrr.h @@ -17,6 +17,9 @@ #define MTRRdefTypeEn (1 << 11) #define MTRRdefTypeFixEn (1 << 10) +#define SMRRphysBase_MSR 0x1f2 +#define SMRRphysMask_MSR 0x1f3 + #define MTRRphysBase_MSR(reg) (0x200 + 2 * (reg)) #define MTRRphysMask_MSR(reg) (0x200 + 2 * (reg) + 1) -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
