1b3c0f1de9a939eb084d1a24c0eb55bae7e160bc
[firefly-linux-kernel-4.4.55.git] / include / asm-x86 / smp_64.h
1 #ifndef __ASM_SMP_H
2 #define __ASM_SMP_H
3
4 #include <linux/cpumask.h>
5 #include <linux/init.h>
6
7 /*
8  * We need the APIC definitions automatically as part of 'smp.h'
9  */
10 #include <asm/apic.h>
11 #include <asm/io_apic.h>
12 #include <asm/mpspec.h>
13 #include <asm/pda.h>
14 #include <asm/thread_info.h>
15
16 extern cpumask_t cpu_initialized;
17 extern cpumask_t cpu_callin_map;
18
19 extern int smp_call_function_mask(cpumask_t mask, void (*func)(void *),
20                                   void *info, int wait);
21
22 static inline int cpu_present_to_apicid(int mps_cpu)
23 {
24         if (cpu_present(mps_cpu))
25                 return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
26         else
27                 return BAD_APICID;
28 }
29
30 #ifdef CONFIG_SMP
31
32 #define raw_smp_processor_id()  read_pda(cpunumber)
33 #define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
34
35 #define stack_smp_processor_id()                                        \
36         ({                                                              \
37         struct thread_info *ti;                                         \
38         __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK));      \
39         ti->cpu;                                                        \
40 })
41
42 /*
43  * On x86 all CPUs are mapped 1:1 to the APIC space. This simplifies
44  * scheduling and IPI sending and compresses data structures.
45  */
46 static inline int num_booting_cpus(void)
47 {
48         return cpus_weight(cpu_callout_map);
49 }
50
51 #else /* CONFIG_SMP */
52
53 extern unsigned int boot_cpu_id;
54 #define cpu_physical_id(cpu)    boot_cpu_id
55 #define stack_smp_processor_id() 0
56
57 #endif /* !CONFIG_SMP */
58
59 #define safe_smp_processor_id()         smp_processor_id()
60
61 static __inline int logical_smp_processor_id(void)
62 {
63         /* we don't want to mark this access volatile - bad code generation */
64         return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
65 }
66
67 static inline int hard_smp_processor_id(void)
68 {
69         /* we don't want to mark this access volatile - bad code generation */
70         return GET_APIC_ID(*(u32 *)(APIC_BASE + APIC_ID));
71 }
72
73 #endif
74