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-rw-r--r--src/northbridge/amd/gx2/northbridge.c47
1 files changed, 23 insertions, 24 deletions
diff --git a/src/northbridge/amd/gx2/northbridge.c b/src/northbridge/amd/gx2/northbridge.c
index 6dd216fc2a..85961f48b7 100644
--- a/src/northbridge/amd/gx2/northbridge.c
+++ b/src/northbridge/amd/gx2/northbridge.c
@@ -119,28 +119,32 @@ struct msr_defaults {
};
-static void
-setup_gx2_cache(int sizem)
+static int
+setup_gx2_cache(void)
{
msr_t msr;
unsigned long long val;
- printk_debug("enable_cache: enable for %dm bytes\n", sizem);
+ int sizembytes, sizereg;
+
+ sizembytes = sizeram();
+ printk_debug("enable_cache: enable for %dm bytes\n", sizembytes);
/* build up the rconf word. */
/* the SYSTOP bits 27:8 are actually the top bits from 31:12. Book fails to say that */
/* set romrp */
val = ((unsigned long long) ROM_PROPERTIES) << 56;
/* make rom base useful for 1M roms */
- /* fuctory sets this to a weird value, just go with it. */
+ /* Flash base address -- sized for 1/2M for now*/
val |= ((unsigned long long) 0xfff800)<<36;
/* set the devrp properties */
val |= ((unsigned long long) DEVICE_PROPERTIES) << 28;
/* sigh. Take our TOM, RIGHT shift 12, since it page-aligned, then LEFT-shift 8 for reg. */
/* yank off 8M for frame buffer and 1M for VSA */
- sizem -= 9;
- sizem *= 0x100000;
- sizem >>= 12;
- sizem <<= 8;
- val |= sizem;
+ sizembytes -= 9;
+ sizereg = sizembytes;
+ sizereg *= 0x100000;
+ sizereg >>= 12;
+ sizereg <<= 8;
+ val |= sizereg;
val |= RAM_PROPERTIES;
msr.lo = val;
msr.hi = (val >> 32);
@@ -149,6 +153,7 @@ setup_gx2_cache(int sizem)
enable_cache();
wbinvd();
+ return sizembytes;
}
/* we have to do this here. We have not found a nicer way to do it */
void
@@ -156,30 +161,24 @@ setup_gx2(void)
{
int i;
msr_t msr;
-
unsigned long sizem, membytes;
- sizem = sizeram();
-
- setup_gx2_cache(sizem);
+ sizem = setup_gx2_cache();
membytes = sizem * 1048576;
- /* we need to set 0x10000029 and 0x40000029 */
- msr.hi = 0x20000000 | membytes >>20;
+ /* we need to set 0x10000028 and 0x40000029 */
+ printk_debug("sizem 0x%x, membytes 0x%x\n", sizem, membytes);
+ msr.hi = 0x20000000 | membytes >>24;
msr.lo = 0x100 | ( ((membytes >>12) & 0xfff) << 20);
- wrmsr(0x10000029, msr);
- wrmsr(0x40000029, msr);
- msr = rdmsr(0x10000029);
- printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x10000029, msr.hi,msr.lo);
- msr = rdmsr(0x40000029);
- printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x40000029, msr.hi,msr.lo);
-
- /* need to write 10000028 for vsm */
- /* it is a P2D_R, but the two we just wrote have same offset; use same value */
wrmsr(0x10000028, msr);
+ msr.hi = 0x20000000 | membytes >>24;
+ msr.lo = 0x100 | ( ((membytes >>12) & 0xfff) << 20);
+ wrmsr(0x40000029, msr);
msr = rdmsr(0x10000028);
printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x10000028, msr.hi,msr.lo);
+ msr = rdmsr(0x40000029);
+ printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x40000029, msr.hi,msr.lo);
/* now do the default MSR values */