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authorKyösti Mälkki <kyosti.malkki@gmail.com>2012-06-30 11:41:08 +0300
committerSven Schnelle <svens@stackframe.org>2012-07-04 14:47:53 +0200
commit5458b9d90a246833de55e0814f0c323a0cf6e471 (patch)
treea4010f1ce9c9cdaa97cabc8ce1f97e0a09a199be /src/include/cpu/x86
parentae7d6ef8b7ef5ca9c04d8d929332d18d563f723e (diff)
downloadcoreboot-5458b9d90a246833de55e0814f0c323a0cf6e471.tar.xz
Intel cpus: Extend cache to cover complete Flash Device
CACHE_ROM_SIZE default is ROM_SIZE, the Flash device size set in menuconfig. This fixes a case where 8 MB SPI flash MTRR setup would not cover the bottom 4 MB when ramstage is decompressed. Verify CACHE_ROM_SIZE is power of two. One may set CACHE_ROM_SIZE==0 to disable this cache. Change-Id: Ib2b4ea528a092b96ff954894e60406d64f250783 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: http://review.coreboot.org/1146 Tested-by: build bot (Jenkins) Reviewed-by: Sven Schnelle <svens@stackframe.org>
Diffstat (limited to 'src/include/cpu/x86')
-rw-r--r--src/include/cpu/x86/mtrr.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/include/cpu/x86/mtrr.h b/src/include/cpu/x86/mtrr.h
index 8b5cc281bc..58bee0412d 100644
--- a/src/include/cpu/x86/mtrr.h
+++ b/src/include/cpu/x86/mtrr.h
@@ -56,6 +56,12 @@ void x86_setup_fixed_mtrrs(void);
# error "CONFIG_XIP_ROM_SIZE is not a power of 2"
#endif
+#if ((CONFIG_CACHE_ROM_SIZE & (CONFIG_CACHE_ROM_SIZE -1)) != 0)
+# error "CONFIG_CACHE_ROM_SIZE is not a power of 2"
+#endif
+
+#define CACHE_ROM_BASE (((1<<20) - (CONFIG_CACHE_ROM_SIZE>>12))<<12)
+
#if (CONFIG_RAMTOP & (CONFIG_RAMTOP - 1)) != 0
# error "CONFIG_RAMTOP must be a power of 2"
#endif