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| author | Scott Duplichan <scott@notabs.org> | 2011-05-15 21:54:04 +0000 |
|---|---|---|
| committer | Marc Jones <marc.jones@amd.com> | 2011-05-15 21:54:04 +0000 |
| commit | 2cc5f550c72ac6a13da798b8f073e3d5c55177e0 (patch) | |
| tree | 3e024874a10cd2f84f3d78554b6a6aa856ef0295 /src/mainboard/amd | |
| parent | d9a634c7560d0af50e141ad18ffc8c48519209e7 (diff) | |
| download | coreboot-2cc5f550c72ac6a13da798b8f073e3d5c55177e0.tar.xz | |
Enable SPI cacheline prefetch early to reduce boot time.
Signed-off-by: Scott Duplichan <scott@notabs.org>
Acked-by: Marc Jones <marcj303@gmail.com>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6584 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/mainboard/amd')
| -rw-r--r-- | src/mainboard/amd/persimmon/romstage.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/mainboard/amd/persimmon/romstage.c b/src/mainboard/amd/persimmon/romstage.c index e3ed847fdb..da2db64071 100644 --- a/src/mainboard/amd/persimmon/romstage.c +++ b/src/mainboard/amd/persimmon/romstage.c @@ -50,6 +50,13 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx) // all cores: set pstate 0 (1600 MHz) early to save a few ms of boot time __writemsr (0xc0010062, 0); + // early enable of PrefetchEnSPIFromHost + if (boot_cpu()) + { + __outdword (0xcf8, 0x8000a3b8); + __outdword (0xcfc, __indword (0xcfc) | 0 << 24); + } + // early enable of SPI 33 MHz fast mode read if (boot_cpu()) { |