diff options
Diffstat (limited to 'src/northbridge/amd')
| -rw-r--r-- | src/northbridge/amd/gx2/raminit.c | 13 | ||||
| -rw-r--r-- | src/northbridge/amd/lx/raminit.c | 13 |
2 files changed, 24 insertions, 2 deletions
diff --git a/src/northbridge/amd/gx2/raminit.c b/src/northbridge/amd/gx2/raminit.c index 636c60b9d2..fcc05e92f4 100644 --- a/src/northbridge/amd/gx2/raminit.c +++ b/src/northbridge/amd/gx2/raminit.c @@ -94,6 +94,17 @@ static void sdram_enable(int controllers, const struct mem_controller *ctrl) msr.lo = 0x8ea0ad6a; wrmsr(0x4c00000f, msr); - /* DRAM working now?? */ + /* Fixes from Jordan Crouse of AMD. */ + + /* make sure there is nothing stale in the cache */ + __asm__("wbinvd\n"); + + print_debug("RAM DLL lock\r\n"); + /* The RAM dll needs a write to lock on so generate a few dummy writes */ + volatile unsigned long *ptr; + for (i=0;i<5;i++) { + ptr = (void *)i; + *ptr = (unsigned long)i; + } } diff --git a/src/northbridge/amd/lx/raminit.c b/src/northbridge/amd/lx/raminit.c index d4a5d7b701..3aeea646c1 100644 --- a/src/northbridge/amd/lx/raminit.c +++ b/src/northbridge/amd/lx/raminit.c @@ -135,6 +135,17 @@ static void sdram_enable(int controllers, const struct mem_controller *ctrl) print_debug("DRAM controller init done.\r\n"); - /* DRAM working now?? */ + /* Fixes from Jordan Crouse of AMD. */ + + /* make sure there is nothing stale in the cache */ + __asm__("wbinvd\n"); + + print_debug("RAM DLL lock\r\n"); + /* The RAM dll needs a write to lock on so generate a few dummy writes */ + volatile unsigned long *ptr; + for (i=0;i<5;i++) { + ptr = (void *)i; + *ptr = (unsigned long)i; + } } |