5 * We need the APIC definitions automatically as part of 'smp.h'
8 #include <linux/config.h>
9 #include <linux/kernel.h>
10 #include <linux/threads.h>
11 #include <linux/cpumask.h>
14 #ifdef CONFIG_X86_LOCAL_APIC
16 #include <asm/fixmap.h>
17 #include <asm/bitops.h>
18 #include <asm/mpspec.h>
19 #ifdef CONFIG_X86_IO_APIC
20 #include <asm/io_apic.h>
26 #define BAD_APICID 0xFFu
31 * Private routines/data
34 extern void smp_alloc_memory(void);
36 extern int smp_num_siblings;
37 extern cpumask_t cpu_sibling_map[];
38 extern cpumask_t cpu_core_map[];
40 extern void (*mtrr_hook) (void);
41 extern void zap_low_mappings (void);
42 extern void lock_ipi_call_lock(void);
43 extern void unlock_ipi_call_lock(void);
45 #define MAX_APICID 256
46 extern u8 x86_cpu_to_apicid[];
48 #ifdef CONFIG_HOTPLUG_CPU
49 extern void cpu_exit_clear(void);
50 extern void cpu_uninit(void);
54 * This function is needed by all SMP systems. It must _always_ be valid
55 * from the initial startup. We map APIC_BASE very early in page_setup(),
56 * so this is correct in the x86 case.
58 #define raw_smp_processor_id() (current_thread_info()->cpu)
60 extern cpumask_t cpu_callout_map;
61 extern cpumask_t cpu_callin_map;
62 extern cpumask_t cpu_possible_map;
64 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
65 static inline int num_booting_cpus(void)
67 return cpus_weight(cpu_callout_map);
70 #ifdef CONFIG_X86_LOCAL_APIC
72 #ifdef APIC_DEFINITION
73 extern int hard_smp_processor_id(void);
75 #include <mach_apicdef.h>
76 static inline int hard_smp_processor_id(void)
78 /* we don't want to mark this access volatile - bad code generation */
79 return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
83 static __inline int logical_smp_processor_id(void)
85 /* we don't want to mark this access volatile - bad code generation */
86 return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
91 extern int __cpu_disable(void);
92 extern void __cpu_die(unsigned int cpu);
93 #endif /* !__ASSEMBLY__ */
95 #define NO_PROC_ID 0xFF /* No processor magic marker */