diff options
| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2012-06-30 11:41:08 +0300 |
|---|---|---|
| committer | Sven Schnelle <svens@stackframe.org> | 2012-07-04 14:47:53 +0200 |
| commit | 5458b9d90a246833de55e0814f0c323a0cf6e471 (patch) | |
| tree | a4010f1ce9c9cdaa97cabc8ce1f97e0a09a199be /src/cpu/intel/car | |
| parent | ae7d6ef8b7ef5ca9c04d8d929332d18d563f723e (diff) | |
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.inc | 5 |
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) |