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