1 #ifndef _ASM_X86_SMP_H_
2 #define _ASM_X86_SMP_H_
4 #include <linux/cpumask.h>
5 #include <linux/init.h>
6 #include <asm/percpu.h>
9 * We need the APIC definitions automatically as part of 'smp.h'
11 #ifdef CONFIG_X86_LOCAL_APIC
12 # include <asm/mpspec.h>
13 # include <asm/apic.h>
14 # ifdef CONFIG_X86_IO_APIC
15 # include <asm/io_apic.h>
19 #include <asm/thread_info.h>
21 extern cpumask_t cpu_callout_map;
22 extern cpumask_t cpu_initialized;
23 extern cpumask_t cpu_callin_map;
25 extern void (*mtrr_hook)(void);
26 extern void zap_low_mappings(void);
28 extern int smp_num_siblings;
29 extern unsigned int num_processors;
30 extern cpumask_t cpu_initialized;
33 extern u16 x86_cpu_to_apicid_init[];
34 extern u16 x86_bios_cpu_apicid_init[];
35 extern void *x86_cpu_to_apicid_early_ptr;
36 extern void *x86_bios_cpu_apicid_early_ptr;
38 #define x86_cpu_to_apicid_early_ptr NULL
39 #define x86_bios_cpu_apicid_early_ptr NULL
42 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
43 DECLARE_PER_CPU(cpumask_t, cpu_core_map);
44 DECLARE_PER_CPU(u16, cpu_llc_id);
45 DECLARE_PER_CPU(u16, x86_cpu_to_apicid);
46 DECLARE_PER_CPU(u16, x86_bios_cpu_apicid);
48 /* Static state in head.S used to set up a CPU */
55 void (*smp_prepare_boot_cpu)(void);
56 void (*smp_prepare_cpus)(unsigned max_cpus);
57 int (*cpu_up)(unsigned cpu);
58 void (*smp_cpus_done)(unsigned max_cpus);
60 void (*smp_send_stop)(void);
61 void (*smp_send_reschedule)(int cpu);
63 void (*send_call_func_ipi)(cpumask_t mask);
64 void (*send_call_func_single_ipi)(int cpu);
67 /* Globals due to paravirt */
68 extern void set_cpu_sibling_map(int cpu);
71 #ifndef CONFIG_PARAVIRT
72 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
74 extern struct smp_ops smp_ops;
76 static inline void smp_send_stop(void)
78 smp_ops.smp_send_stop();
81 static inline void smp_prepare_boot_cpu(void)
83 smp_ops.smp_prepare_boot_cpu();
86 static inline void smp_prepare_cpus(unsigned int max_cpus)
88 smp_ops.smp_prepare_cpus(max_cpus);
91 static inline void smp_cpus_done(unsigned int max_cpus)
93 smp_ops.smp_cpus_done(max_cpus);
96 static inline int __cpu_up(unsigned int cpu)
98 return smp_ops.cpu_up(cpu);
101 static inline void smp_send_reschedule(int cpu)
103 smp_ops.smp_send_reschedule(cpu);
106 static inline void arch_send_call_function_single_ipi(int cpu)
108 smp_ops.send_call_func_single_ipi(cpu);
111 static inline void arch_send_call_function_ipi(cpumask_t mask)
113 smp_ops.send_call_func_ipi(mask);
116 void native_smp_prepare_boot_cpu(void);
117 void native_smp_prepare_cpus(unsigned int max_cpus);
118 void native_smp_cpus_done(unsigned int max_cpus);
119 int native_cpu_up(unsigned int cpunum);
120 void native_send_call_func_ipi(cpumask_t mask);
121 void native_send_call_func_single_ipi(int cpu);
123 extern int __cpu_disable(void);
124 extern void __cpu_die(unsigned int cpu);
126 extern void prefill_possible_map(void);
128 void smp_store_cpu_info(int id);
129 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
131 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
132 static inline int num_booting_cpus(void)
134 return cpus_weight(cpu_callout_map);
136 #endif /* CONFIG_SMP */
138 extern unsigned disabled_cpus __cpuinitdata;
140 #ifdef CONFIG_X86_32_SMP
142 * This function is needed by all SMP systems. It must _always_ be valid
143 * from the initial startup. We map APIC_BASE very early in page_setup(),
144 * so this is correct in the x86 case.
146 DECLARE_PER_CPU(int, cpu_number);
147 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
148 extern int safe_smp_processor_id(void);
150 #elif defined(CONFIG_X86_64_SMP)
151 #define raw_smp_processor_id() read_pda(cpunumber)
153 #define stack_smp_processor_id() \
155 struct thread_info *ti; \
156 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
159 #define safe_smp_processor_id() smp_processor_id()
161 #else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */
162 #define cpu_physical_id(cpu) boot_cpu_physical_apicid
163 #define safe_smp_processor_id() 0
164 #define stack_smp_processor_id() 0
167 #ifdef CONFIG_X86_LOCAL_APIC
169 static inline int logical_smp_processor_id(void)
171 /* we don't want to mark this access volatile - bad code generation */
172 return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
175 #ifndef CONFIG_X86_64
176 static inline unsigned int read_apic_id(void)
178 return *(u32 *)(APIC_BASE + APIC_ID);
181 extern unsigned int read_apic_id(void);
185 # ifdef APIC_DEFINITION
186 extern int hard_smp_processor_id(void);
188 # include <mach_apicdef.h>
189 static inline int hard_smp_processor_id(void)
191 /* we don't want to mark this access volatile - bad code generation */
192 return GET_APIC_ID(read_apic_id());
194 # endif /* APIC_DEFINITION */
196 #else /* CONFIG_X86_LOCAL_APIC */
199 # define hard_smp_processor_id() 0
202 #endif /* CONFIG_X86_LOCAL_APIC */
204 #ifdef CONFIG_HOTPLUG_CPU
205 extern void cpu_exit_clear(void);
206 extern void cpu_uninit(void);
209 extern void smp_alloc_memory(void);
210 #endif /* __ASSEMBLY__ */