diff options
| author | Tejun Heo <tj@kernel.org> | 2011-01-23 14:37:36 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-01-28 14:54:07 +0100 |
| commit | 3b39d937843e071c59b3aeecbf7de4750f095b12 (patch) | |
| tree | 3d4d7094a77aa980c36bd4f111314d009526566a /arch/x86/kernel/apic | |
| parent | 12bf24a47c1a095233cc8a8b863b509a0d8e0f2c (diff) | |
x86: Implement x86_32_early_logical_apicid() for summit_32
Factor out logical apic id calculation from
summit_init_apic_ldr() and use it for the
x86_32_early_logical_apicid() callback.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: penberg@kernel.org
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-11-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/apic')
| -rw-r--r-- | arch/x86/kernel/apic/summit_32.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/arch/x86/kernel/apic/summit_32.c b/arch/x86/kernel/apic/summit_32.c index 172c498e888..8c914732161 100644 --- a/arch/x86/kernel/apic/summit_32.c +++ b/arch/x86/kernel/apic/summit_32.c @@ -194,11 +194,10 @@ static unsigned long summit_check_apicid_present(int bit) return 1; } -static void summit_init_apic_ldr(void) +static int summit_early_logical_apicid(int cpu) { - unsigned long val, id; int count = 0; - u8 my_id = (u8)hard_smp_processor_id(); + u8 my_id = early_per_cpu(x86_cpu_to_apicid, cpu); u8 my_cluster = APIC_CLUSTER(my_id); #ifdef CONFIG_SMP u8 lid; @@ -214,7 +213,15 @@ static void summit_init_apic_ldr(void) /* We only have a 4 wide bitmap in cluster mode. If a deranged * BIOS puts 5 CPUs in one APIC cluster, we're hosed. */ BUG_ON(count >= XAPIC_DEST_CPUS_SHIFT); - id = my_cluster | (1UL << count); + return my_cluster | (1UL << count); +} + +static void summit_init_apic_ldr(void) +{ + int cpu = smp_processor_id(); + unsigned long id = early_per_cpu(x86_cpu_to_logical_apicid, cpu); + unsigned long val; + apic_write(APIC_DFR, SUMMIT_APIC_DFR_VALUE); val = apic_read(APIC_LDR) & ~APIC_LDR_MASK; val |= SET_APIC_LOGICAL_ID(id); @@ -553,5 +560,5 @@ struct apic apic_summit = { .wait_icr_idle = native_apic_wait_icr_idle, .safe_wait_icr_idle = native_safe_apic_wait_icr_idle, - .x86_32_early_logical_apicid = noop_x86_32_early_logical_apicid, + .x86_32_early_logical_apicid = summit_early_logical_apicid, }; |