diff options
| author | Glauber Costa <gcosta@redhat.com> | 2008-03-27 18:06:02 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-17 17:41:32 +0200 |
| commit | a9c057c1d1b1080a01004ecac54308365e167b83 (patch) | |
| tree | a14daf277587a231e6c4c08304abb29b1b365d49 /include/asm-x86/smp.h | |
| parent | x86: split safe_smp_processor_id (diff) | |
| download | linux-a9c057c1d1b1080a01004ecac54308365e167b83.tar.xz linux-a9c057c1d1b1080a01004ecac54308365e167b83.zip | |
x86: merge SMP definitions of smp.h
we merge everything that is inside CONFIG_SMP
to smp.h. They differ a little bit, so we use
CONFIG_X86_32_SMP and CONFIG_X86_64_SMP as markers.
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-x86/smp.h')
| -rw-r--r-- | include/asm-x86/smp.h | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/include/asm-x86/smp.h b/include/asm-x86/smp.h index 21472cea3d6c..57b3d86dd9ed 100644 --- a/include/asm-x86/smp.h +++ b/include/asm-x86/smp.h @@ -126,8 +126,39 @@ extern unsigned long setup_trampoline(void); void smp_store_cpu_info(int id); #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) -#else + +/* We don't mark CPUs online until __cpu_up(), so we need another measure */ +static inline int num_booting_cpus(void) +{ + return cpus_weight(cpu_callout_map); +} +#endif /* CONFIG_SMP */ + +#ifdef CONFIG_X86_32_SMP +/* + * This function is needed by all SMP systems. It must _always_ be valid + * from the initial startup. We map APIC_BASE very early in page_setup(), + * so this is correct in the x86 case. + */ +DECLARE_PER_CPU(int, cpu_number); +#define raw_smp_processor_id() (x86_read_percpu(cpu_number)) +extern int safe_smp_processor_id(void); + +#elif defined(CONFIG_X86_64_SMP) +#define raw_smp_processor_id() read_pda(cpunumber) + +#define stack_smp_processor_id() \ +({ \ + struct thread_info *ti; \ + __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \ + ti->cpu; \ +}) +#define safe_smp_processor_id() smp_processor_id() + +#else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */ #define cpu_physical_id(cpu) boot_cpu_physical_apicid +#define safe_smp_processor_id() 0 +#define stack_smp_processor_id() 0 #endif #ifdef CONFIG_X86_32 |