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| author | Nico Huber <nico.huber@secunet.com> | 2012-09-06 17:46:30 +0200 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2012-11-02 20:09:57 +0100 |
| commit | ad874e3477ba391d8fe02b0cab6334be67e2e303 (patch) | |
| tree | 6459a15ed1637c1ef97c12f246264bcd09bdae83 /src/cpu | |
| parent | 336db54a00daab2d6b49a51eb87fe71bff934166 (diff) | |
Correct FSB reading in speedstep ACPI
We parsed the MSR the wrong way, and didn't support some valid values.
Change-Id: Ia42e3de05dd76b6830aaa310ec82031d36def3a0
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/1656
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/intel/speedstep/acpi.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/cpu/intel/speedstep/acpi.c b/src/cpu/intel/speedstep/acpi.c index 249d9e47a8..d658c705ee 100644 --- a/src/cpu/intel/speedstep/acpi.c +++ b/src/cpu/intel/speedstep/acpi.c @@ -49,13 +49,15 @@ static int determine_total_number_of_cores(void) static int get_fsb(void) { - u32 fsbcode=(rdmsr(0xcd).lo >> 4) & 7; + const u32 fsbcode = rdmsr(0xcd).lo & 7; switch (fsbcode) { case 0: return 266; case 1: return 133; case 2: return 200; case 3: return 166; + case 4: return 333; case 5: return 100; + case 6: return 400; } printk(BIOS_DEBUG, "Warning: No supported FSB frequency. Assuming 200MHz\n"); return 200; |