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authorJason Schildt <jschildt@gmail.com>2005-08-09 21:53:07 +0000
committerJason Schildt <jschildt@gmail.com>2005-08-09 21:53:07 +0000
commit6e44b422b3b26a4ce5b98fca12d0f3ef7d7af110 (patch)
tree4f94702f435949875bed8f725928cb571b7f40c8 /src/cpu/x86/mtrr
parentdc2454eb944c2ea9201bd650d7bc9942d4653a6c (diff)
downloadcoreboot-6e44b422b3b26a4ce5b98fca12d0f3ef7d7af110.tar.xz
- Merge from linuxbios-lnxi (Linux Networx repository) up to public tree.
- Special version for HDAMA rev G with 33Mhz test and reboot out. - Support for CPU rev E, dual core, memory hoisting, - corrected an SST flashing problem. Kernel bug work around (NUMA) - added a Kernel bug work around for assigning CPU's to memory. r2@gog: svnadmin | 2005-08-03 08:47:54 -0600 Create local LNXI branch r1110@gog: jschildt | 2005-08-09 10:35:51 -0600 - Merge from Tom Zimmerman's additions to the hdama code for dual core and 33Mhz fix. r1111@gog: jschildt | 2005-08-09 11:07:11 -0600 Stable Release tag for HDAMA-1.1.8.10 and HDAMA-1.1.8.10LANL r1112@gog: jschildt | 2005-08-09 15:09:32 -0600 - temporarily removing hdama tag to update to public repository. Will reset tag after update. git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2004 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/cpu/x86/mtrr')
-rw-r--r--src/cpu/x86/mtrr/earlymtrr.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/src/cpu/x86/mtrr/earlymtrr.c b/src/cpu/x86/mtrr/earlymtrr.c
index 105f7c49df..aea8e258d4 100644
--- a/src/cpu/x86/mtrr/earlymtrr.c
+++ b/src/cpu/x86/mtrr/earlymtrr.c
@@ -117,4 +117,17 @@ static void early_mtrr_init(void)
enable_cache();
}
+static int early_mtrr_init_detected(void)
+{
+ msr_t msr;
+ /* See if MTRR's are enabled.
+ * a #RESET disables them while an #INIT
+ * preserves their state. This works
+ * on both Intel and AMD cpus, at least
+ * according to the documentation.
+ */
+ msr = rdmsr(MTRRdefType_MSR);
+ return msr.lo & 0x00000800;
+}
+
#endif /* EARLYMTRR_C */