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[];
39 extern void smp_flush_tlb(void);
40 extern void dump_send_ipi(void);
41 extern void smp_message_irq(int cpl, void *dev_id, struct pt_regs *regs);
42 extern void smp_invalidate_rcv(void); /* Process an NMI */
43 extern void (*mtrr_hook) (void);
44 extern void zap_low_mappings (void);
45 extern void stop_this_cpu(void *);
47 #define MAX_APICID 256
48 extern u8 x86_cpu_to_apicid[];
51 * This function is needed by all SMP systems. It must _always_ be valid
52 * from the initial startup. We map APIC_BASE very early in page_setup(),
53 * so this is correct in the x86 case.
55 #define smp_processor_id() (current_thread_info()->cpu)
57 extern cpumask_t cpu_callout_map;
58 #define cpu_possible_map cpu_callout_map
60 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
61 static inline int num_booting_cpus(void)
63 return cpus_weight(cpu_callout_map);
66 extern void map_cpu_to_logical_apicid(void);
67 extern void unmap_cpu_to_logical_apicid(int cpu);
69 #ifdef CONFIG_X86_LOCAL_APIC
71 #ifdef APIC_DEFINITION
72 extern int hard_smp_processor_id(void);
74 #include <mach_apicdef.h>
75 static inline int hard_smp_processor_id(void)
77 /* we don't want to mark this access volatile - bad code generation */
78 return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
82 static __inline int logical_smp_processor_id(void)
84 /* we don't want to mark this access volatile - bad code generation */
85 return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
89 #endif /* !__ASSEMBLY__ */
91 #define NO_PROC_ID 0xFF /* No processor magic marker */