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3654c4623c
The MTRR calculation algorithm contains a bug that when left
subtraction cannot produce better MTRR solution, it forgets
to restore the BaseAddress/Length so that MtrrLibGetMtrrNumber()
returns bigger value of actual required MTRR numbers.
As a result, the MtrrLib reports OutOfResource but actually the
MTRR is enough.
MEMORY_RANGE mC[] = {
0, 0x100000, CacheUncacheable,
0x100000, 0x89F00000, CacheWriteBack,
0x8A000000, 0x75000000, CacheUncacheable,
0xFF000000, 0x01000000, CacheWriteProtected,
0x100000000, 0x7F00000000, CacheUncacheable,
0xFC240000, 0x2000, CacheWriteCombining // <-- trigger the error
};
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>