summaryrefslogtreecommitdiff
path: root/src/cpu/amd/car
diff options
context:
space:
mode:
authorKyösti Mälkki <kyosti.malkki@gmail.com>2016-06-19 20:38:41 +0300
committerKyösti Mälkki <kyosti.malkki@gmail.com>2016-06-22 11:03:42 +0200
commit65cc526f6f47755b4492cd9fc2134fb2dd067e90 (patch)
tree9b7357287b96f73a762592ccc8b7d2153eff1d46 /src/cpu/amd/car
parentc5400efc11e181caf0babaa6001de18e3f23c6af (diff)
downloadcoreboot-65cc526f6f47755b4492cd9fc2134fb2dd067e90.tar.xz
Ignore RAMTOP for MTRRs
Without RELOCATABLE_RAMSTAGE have WB cache large enough to cover the greatest ramstage needs, as there is no benefit of trying to accurately match the actual need. Choose this to be bottom 16MiB. With RELOCATABLE_RAMSTAGE write-back cache of low ram is only useful for bottom 1MiB of RAM as a small part of this gets used during SMP initialisation before proper MTRR setup. Change-Id: Icd5f8461f81ed0e671130f1142641a48d1304f30 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/15249 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/cpu/amd/car')
-rw-r--r--src/cpu/amd/car/post_cache_as_ram.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/cpu/amd/car/post_cache_as_ram.c b/src/cpu/amd/car/post_cache_as_ram.c
index 0a59696b56..1880ccb441 100644
--- a/src/cpu/amd/car/post_cache_as_ram.c
+++ b/src/cpu/amd/car/post_cache_as_ram.c
@@ -175,8 +175,8 @@ void cache_as_ram_new_stack (void)
disable_cache_as_ram_bsp();
disable_cache();
- /* Enable cached access to RAM in the range 1M to CONFIG_RAMTOP */
- set_var_mtrr(0, 0x00000000, CONFIG_RAMTOP, MTRR_TYPE_WRBACK);
+ /* Enable cached access to RAM in the range 0M to CACHE_TMP_RAMTOP */
+ set_var_mtrr(0, 0x00000000, CACHE_TMP_RAMTOP, MTRR_TYPE_WRBACK);
enable_cache();
if (acpi_is_wakeup_s3()) {