cpu/x86/mtrr: Fix sign overflow
Use unsigned long to prevent sign overflow. Fixes wrong MTRRs settings on x86_64 romstage. Signed-off-by: Patrick Rudolph <siro@das-labor.org> Change-Id: I71b61a45becc17bf60a619e4131864c82a16b0d1 Reviewed-on: https://review.coreboot.org/c/30502 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
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@ -150,7 +150,7 @@ static inline unsigned int fls(unsigned int x)
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#define _ALIGN_DOWN_POW2(x) ((x) & ~_POW2_MASK(x))
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/* Calculate `4GiB - x` (e.g. absolute address for offset from 4GiB) */
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#define _FROM_4G_TOP(x) (((1 << 20) - ((x) >> 12)) << 12)
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#define _FROM_4G_TOP(x) (((1UL << 20) - ((x) >> 12)) << 12)
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/* At the end of romstage, low RAM 0..CACHE_TM_RAMTOP may be set
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* as write-back cacheable to speed up ramstage decompression.
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