| #ifndef __ASM_SMP_H |
| #define __ASM_SMP_H |
| |
| #include <linux/cpumask.h> |
| #include <linux/init.h> |
| |
| /* |
| * We need the APIC definitions automatically as part of 'smp.h' |
| */ |
| #include <asm/apic.h> |
| #include <asm/io_apic.h> |
| #include <asm/mpspec.h> |
| #include <asm/pda.h> |
| #include <asm/thread_info.h> |
| |
| extern cpumask_t cpu_initialized; |
| extern cpumask_t cpu_callin_map; |
| |
| extern int smp_call_function_mask(cpumask_t mask, void (*func)(void *), |
| void *info, int wait); |
| |
| #ifdef CONFIG_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; \ |
| }) |
| |
| /* |
| * On x86 all CPUs are mapped 1:1 to the APIC space. This simplifies |
| * scheduling and IPI sending and compresses data structures. |
| */ |
| static inline int num_booting_cpus(void) |
| { |
| return cpus_weight(cpu_callout_map); |
| } |
| |
| #else /* CONFIG_SMP */ |
| #define stack_smp_processor_id() 0 |
| |
| #endif /* !CONFIG_SMP */ |
| |
| #define safe_smp_processor_id() smp_processor_id() |
| |
| #endif |
| |