diff options
| author | Elyes HAOUAS <ehaouas@noos.fr> | 2016-10-31 18:55:04 +0100 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2016-12-21 00:05:10 +0100 |
| commit | f7acdf82cbfaf3e2b2b0db784b822207f1b1d026 (patch) | |
| tree | 225cf39869d2da449e48d95112f73ff6e375c262 /src/northbridge | |
| parent | 1b3a6e4b1489af477cfff1b1df4a37ccdb75f20d (diff) | |
| download | coreboot-f7acdf82cbfaf3e2b2b0db784b822207f1b1d026.tar.xz | |
nb/i945/early_init.c: Add FSB800 and 1067 to Egress Port Virtual Channel
Values based on vendor bios and suggested by Arthur Heymans for FSB1067.
FSB1067:
The ratio 1067/800 is proportional to the ratio of EPBAR32(0x2c) bits:
0x1a / 0x14 ~ 1067/800
EPVC1IST:
The ratio is also proportional to FSB ratios: 0x9c / 0xf0 ~ 533/800.
Change-Id: Ib90e8ea1b82f2fcc3b5c199cace32a7f0aff4b5c
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/17198
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Diffstat (limited to 'src/northbridge')
| -rw-r--r-- | src/northbridge/intel/i945/early_init.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/northbridge/intel/i945/early_init.c b/src/northbridge/intel/i945/early_init.c index 377302a235..8930cb6326 100644 --- a/src/northbridge/intel/i945/early_init.c +++ b/src/northbridge/intel/i945/early_init.c @@ -232,8 +232,14 @@ static void i945_setup_egress_port(void) /* Egress Port Virtual Channel 1 Configuration */ reg32 = EPBAR32(0x2c); reg32 &= 0xffffff00; + if (IS_ENABLED(CONFIG_NORTHBRIDGE_INTEL_SUBTYPE_I945GC)) { + if ((MCHBAR32(CLKCFG) & 7) == 0) + reg32 |= 0x1a; /* 1067MHz */ + } if ((MCHBAR32(CLKCFG) & 7) == 1) reg32 |= 0x0d; /* 533MHz */ + if ((MCHBAR32(CLKCFG) & 7) == 2) + reg32 |= 0x14; /* 800MHz */ if ((MCHBAR32(CLKCFG) & 7) == 3) reg32 |= 0x10; /* 667MHz */ EPBAR32(0x2c) = reg32; @@ -245,11 +251,23 @@ static void i945_setup_egress_port(void) reg32 |= (0x0a << 16); EPBAR32(EPVC1RCAP) = reg32; + if (IS_ENABLED(CONFIG_NORTHBRIDGE_INTEL_SUBTYPE_I945GC)) { + if ((MCHBAR32(CLKCFG) & 7) == 0){ /* 1067MHz */ + EPBAR32(EPVC1IST + 0) = 0x01380138; + EPBAR32(EPVC1IST + 4) = 0x01380138; + } + } + if ((MCHBAR32(CLKCFG) & 7) == 1) { /* 533MHz */ EPBAR32(EPVC1IST + 0) = 0x009c009c; EPBAR32(EPVC1IST + 4) = 0x009c009c; } + if ((MCHBAR32(CLKCFG) & 7) == 2) { /* 800MHz */ + EPBAR32(EPVC1IST + 0) = 0x00f000f0; + EPBAR32(EPVC1IST + 4) = 0x00f000f0; + } + if ((MCHBAR32(CLKCFG) & 7) == 3) { /* 667MHz */ EPBAR32(EPVC1IST + 0) = 0x00c000c0; EPBAR32(EPVC1IST + 4) = 0x00c000c0; |