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authorMarc Jones <marc.jones@amd.com>2007-05-10 23:22:27 +0000
committerStefan Reinauer <stepan@openbios.org>2007-05-10 23:22:27 +0000
commitddf845f620eb43d9ea2e8b0b265c321c6e797e6f (patch)
treeae8b74aa6ab4df81ec7061db6ab8c1cb941e8b58 /src/northbridge
parent03625f4daf8bd92b8be64d795f8e46c01cc7468d (diff)
downloadcoreboot-ddf845f620eb43d9ea2e8b0b265c321c6e797e6f.tar.xz
This patch cleans up and clarifies Geode source code comments.
Signed-off-by: Marc Jones <marc.jones@amd.com> Acked-by: Stefan Reinauer <stepan@coresystems.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2658 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/northbridge')
-rw-r--r--src/northbridge/amd/lx/northbridge.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/src/northbridge/amd/lx/northbridge.c b/src/northbridge/amd/lx/northbridge.c
index 7f419e739e..4ad67006bb 100644
--- a/src/northbridge/amd/lx/northbridge.c
+++ b/src/northbridge/amd/lx/northbridge.c
@@ -127,6 +127,7 @@ int sizeram(void)
int sizem = 0;
unsigned short dimm;
+ /* Get the RAM size from the memory controller as calculated and set by auto_size_dimm() */
msr = rdmsr(MC_CF07_DATA);
printk_debug("sizeram: _MSR MC_CF07_DATA: %08x:%08x\n", msr.hi, msr.lo);
@@ -134,14 +135,14 @@ int sizeram(void)
dimm = msr.hi;
/* installed? */
if ((dimm & 7) != 7) {
- sizem = 4 << ((dimm >> 12) & 0x0F);
+ sizem = 4 << ((dimm >> 12) & 0x0F); /* 1:8MB, 2:16MB, 3:32MB, 4:64MB, ... 7:512MB, 8:1GB */
}
/* dimm 1 */
dimm = msr.hi >> 16;
/* installed? */
if ((dimm & 7) != 7) {
- sizem += 4 << ((dimm >> 12) & 0x0F);
+ sizem += 4 << ((dimm >> 12) & 0x0F); /* 1:8MB, 2:16MB, 3:32MB, 4:64MB, ... 7:512MB, 8:1GB */
}
printk_debug("sizeram: sizem 0x%xMB\n", sizem);