| #ifndef __ASM_SMP_H |
| #define __ASM_SMP_H |
| |
| #ifndef __ASSEMBLY__ |
| #include <linux/cpumask.h> |
| #include <linux/init.h> |
| |
| /* |
| * We need the APIC definitions automatically as part of 'smp.h' |
| */ |
| #ifdef CONFIG_X86_LOCAL_APIC |
| # include <asm/mpspec.h> |
| # include <asm/apic.h> |
| # ifdef CONFIG_X86_IO_APIC |
| # include <asm/io_apic.h> |
| # endif |
| #endif |
| |
| extern cpumask_t cpu_callin_map; |
| |
| extern void (*mtrr_hook)(void); |
| extern void zap_low_mappings(void); |
| |
| #ifdef CONFIG_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); |
| |
| /* 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); |
| } |
| |
| #else /* CONFIG_SMP */ |
| #define safe_smp_processor_id() 0 |
| #endif /* !CONFIG_SMP */ |
| |
| #endif /* !ASSEMBLY */ |
| #endif |