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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/cpu/intel/car
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/cpu/intel/car')
-rw-r--r--src/cpu/intel/car/cache_as_ram_ht.inc5
1 files changed, 2 insertions, 3 deletions
diff --git a/src/cpu/intel/car/cache_as_ram_ht.inc b/src/cpu/intel/car/cache_as_ram_ht.inc
index 4e0f391d33..65da51631b 100644
--- a/src/cpu/intel/car/cache_as_ram_ht.inc
+++ b/src/cpu/intel/car/cache_as_ram_ht.inc
@@ -30,9 +30,6 @@
#define LAPIC(x) $(LAPIC_DEFAULT_BASE | LAPIC_ ## x)
#define START_IPI_VECTOR ((CONFIG_AP_SIPI_VECTOR >> 12) & 0xff)
-/* Base address to cache all of Flash ROM, just below 4GB. */
-#define CACHE_ROM_BASE ((1<<22 - CONFIG_CACHE_ROM_SIZE>>10)<<10)
-
#define CACHE_AS_RAM_SIZE CONFIG_DCACHE_RAM_SIZE
#define CACHE_AS_RAM_BASE CONFIG_DCACHE_RAM_BASE
@@ -380,6 +377,7 @@ no_msr_11e:
movl $(~(CONFIG_RAMTOP - 1) | MTRRphysMaskValid), %eax
wrmsr
+#if CONFIG_CACHE_ROM_SIZE
/* Enable caching and Speculative Reads for Flash ROM device. */
movl $MTRRphysBase_MSR(1), %ecx
movl $(CACHE_ROM_BASE | MTRR_TYPE_WRPROT), %eax
@@ -389,6 +387,7 @@ no_msr_11e:
rdmsr
movl $(~(CONFIG_CACHE_ROM_SIZE - 1) | MTRRphysMaskValid), %eax
wrmsr
+#endif
post_code(0x39)