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| author | Cyrill Gorcunov <gorcunov@gmail.com> | 2008-08-16 23:21:50 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-08-17 16:41:47 +0400 |
| commit | 6764014bc8bb4849f6a4f336477e873ad5861ed2 (patch) | |
| tree | 309b739269798011b2ac1602219f41327e9061d3 /arch/x86/kernel/apic_64.c | |
| parent | 638c0411922540deaf8797cacf73513b17618405 (diff) | |
| download | linux-6764014bc8bb4849f6a4f336477e873ad5861ed2.tar.xz | |
x86: apic - unify clear_local_APIC
- Remove redundant masking of APIC_LVTTHMR register in apic_32.c
- Add masking of APIC_LVTTHMR register to apic_64.c. We use a bit
complicated #ifdef here: CONFIG_X86_MCE_P4THERMAL is 32bit specific
and X86_MCE_INTEL is 64bit specific so the appropriate config variable
will be set by Kconfig.
- the APIC_ESR register clearing in apic_64.c now uses not straightforward
way but this is allowed tradeoff.
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/apic_64.c')
| -rw-r--r-- | arch/x86/kernel/apic_64.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/arch/x86/kernel/apic_64.c b/arch/x86/kernel/apic_64.c index 99d18b8976a5..d834b7583624 100644 --- a/arch/x86/kernel/apic_64.c +++ b/arch/x86/kernel/apic_64.c @@ -630,6 +630,13 @@ void clear_local_APIC(void) apic_write(APIC_LVTPC, v | APIC_LVT_MASKED); } + /* lets not touch this if we didn't frob it */ +#if defined(CONFIG_X86_MCE_P4THERMAL) || defined(X86_MCE_INTEL) + if (maxlvt >= 5) { + v = apic_read(APIC_LVTTHMR); + apic_write(APIC_LVTTHMR, v | APIC_LVT_MASKED); + } +#endif /* * Clean APIC state for other OSs: */ @@ -640,8 +647,14 @@ void clear_local_APIC(void) apic_write(APIC_LVTERR, APIC_LVT_MASKED); if (maxlvt >= 4) apic_write(APIC_LVTPC, APIC_LVT_MASKED); - apic_write(APIC_ESR, 0); - apic_read(APIC_ESR); + + /* Integrated APIC (!82489DX) ? */ + if (lapic_is_integrated()) { + if (maxlvt > 3) + /* Clear ESR due to Pentium errata 3AP and 11AP */ + apic_write(APIC_ESR, 0); + apic_read(APIC_ESR); + } } /** |