5 * We need the APIC definitions automatically as part of 'smp.h'
8 #include <linux/config.h>
9 #include <linux/threads.h>
10 #include <linux/cpumask.h>
11 #include <linux/bitops.h>
12 extern int disable_apic;
15 #ifdef CONFIG_X86_LOCAL_APIC
17 #include <asm/fixmap.h>
18 #include <asm/mpspec.h>
19 #ifdef CONFIG_X86_IO_APIC
20 #include <asm/io_apic.h>
23 #include <asm/thread_info.h>
34 extern cpumask_t cpu_present_mask;
35 extern cpumask_t cpu_possible_map;
36 extern cpumask_t cpu_online_map;
37 extern cpumask_t cpu_callout_map;
40 * Private routines/data
43 extern void smp_alloc_memory(void);
44 extern volatile unsigned long smp_invalidate_needed;
46 extern int smp_num_siblings;
47 extern void smp_flush_tlb(void);
48 extern void smp_message_irq(int cpl, void *dev_id, struct pt_regs *regs);
49 extern void smp_send_reschedule(int cpu);
50 extern void smp_invalidate_rcv(void); /* Process an NMI */
51 extern void zap_low_mappings(void);
52 void smp_stop_cpu(void);
53 extern cpumask_t cpu_sibling_map[NR_CPUS];
54 extern cpumask_t cpu_core_map[NR_CPUS];
55 extern u8 phys_proc_id[NR_CPUS];
56 extern u8 cpu_core_id[NR_CPUS];
58 #define SMP_TRAMPOLINE_BASE 0x6000
61 * On x86 all CPUs are mapped 1:1 to the APIC space.
62 * This simplifies scheduling and IPI sending and
63 * compresses data structures.
66 static inline int num_booting_cpus(void)
68 return cpus_weight(cpu_callout_map);
71 #define __smp_processor_id() read_pda(cpunumber)
73 extern __inline int hard_smp_processor_id(void)
75 /* we don't want to mark this access volatile - bad code generation */
76 return GET_APIC_ID(*(unsigned int *)(APIC_BASE+APIC_ID));
79 extern int safe_smp_processor_id(void);
81 #endif /* !ASSEMBLY */
83 #define NO_PROC_ID 0xFF /* No processor magic marker */
89 * Some lowlevel functions might want to know about
90 * the real APIC ID <-> CPU # mapping.
92 extern u8 x86_cpu_to_apicid[NR_CPUS]; /* physical ID */
93 extern u8 x86_cpu_to_log_apicid[NR_CPUS];
94 extern u8 bios_cpu_apicid[];
96 static inline unsigned int cpu_mask_to_apicid(cpumask_t cpumask)
98 return cpus_addr(cpumask)[0];
101 static inline int cpu_present_to_apicid(int mps_cpu)
103 if (mps_cpu < NR_CPUS)
104 return (int)bios_cpu_apicid[mps_cpu];
109 #endif /* !ASSEMBLY */
112 #define stack_smp_processor_id() 0
113 #define safe_smp_processor_id() 0
114 #define cpu_logical_map(x) (x)
116 #include <asm/thread_info.h>
117 #define stack_smp_processor_id() \
119 struct thread_info *ti; \
120 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
126 static __inline int logical_smp_processor_id(void)
128 /* we don't want to mark this access volatile - bad code generation */
129 return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));