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>
35 * Private routines/data
38 extern void smp_alloc_memory(void);
39 extern cpumask_t cpu_online_map;
40 extern volatile unsigned long smp_invalidate_needed;
42 extern int smp_num_siblings;
43 extern void smp_flush_tlb(void);
44 extern void smp_message_irq(int cpl, void *dev_id, struct pt_regs *regs);
45 extern void smp_send_reschedule(int cpu);
46 extern void smp_invalidate_rcv(void); /* Process an NMI */
47 extern void (*mtrr_hook) (void);
48 extern void zap_low_mappings(void);
49 void smp_stop_cpu(void);
50 extern char cpu_sibling_map[];
51 extern char phys_proc_id[NR_CPUS];
53 #define SMP_TRAMPOLINE_BASE 0x6000
56 * On x86 all CPUs are mapped 1:1 to the APIC space.
57 * This simplifies scheduling and IPI sending and
58 * compresses data structures.
61 extern cpumask_t cpu_callout_map;
62 #define cpu_possible_map cpu_callout_map
63 #define cpu_online(cpu) cpu_isset(cpu, cpu_online_map)
65 static inline int num_booting_cpus(void)
67 return cpus_weight(cpu_callout_map);
70 #define smp_processor_id() read_pda(cpunumber)
72 extern __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 int *)(APIC_BASE+APIC_ID));
79 * Some lowlevel functions might want to know about
80 * the real APIC ID <-> CPU # mapping.
81 * AK: why is this volatile?
83 extern volatile char x86_cpu_to_apicid[NR_CPUS];
85 static inline char x86_apicid_to_cpu(char apicid)
89 for (i = 0; i < NR_CPUS; ++i)
90 if (x86_cpu_to_apicid[i] == apicid)
96 #define safe_smp_processor_id() (disable_apic ? 0 : x86_apicid_to_cpu(hard_smp_processor_id()))
98 extern u8 bios_cpu_apicid[];
100 static inline int cpu_present_to_apicid(int mps_cpu)
102 if (mps_cpu < NR_CPUS)
103 return (int)bios_cpu_apicid[mps_cpu];
108 #define cpu_online(cpu) cpu_isset(cpu, cpu_online_map)
109 #endif /* !ASSEMBLY */
111 #define NO_PROC_ID 0xFF /* No processor magic marker */
114 #define INT_DELIVERY_MODE 1 /* logical delivery */
115 #define TARGET_CPUS 1
118 static inline unsigned int cpu_mask_to_apicid(cpumask_const_t cpumask)
120 return cpus_coerce_const(cpumask);
125 #define stack_smp_processor_id() 0
126 #define safe_smp_processor_id() 0
127 #define cpu_logical_map(x) (x)
129 #include <asm/thread_info.h>
130 #define stack_smp_processor_id() \
132 struct thread_info *ti; \
133 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \