diff options
Diffstat (limited to 'src/northbridge')
| -rw-r--r-- | src/northbridge/amd/gx2/northbridge.c | 47 |
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 */ |