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 __cpuinit get_local_pda(int cpu);
30 extern int smp_num_siblings;
31 extern unsigned int num_processors;
32 extern cpumask_t cpu_initialized;
34 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
35 DECLARE_PER_CPU(cpumask_t, cpu_core_map);
36 DECLARE_PER_CPU(u16, cpu_llc_id);
38 DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid);
39 DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
41 /* Static state in head.S used to set up a CPU */
48 void (*smp_prepare_boot_cpu)(void);
49 void (*smp_prepare_cpus)(unsigned max_cpus);
50 int (*cpu_up)(unsigned cpu);
51 void (*smp_cpus_done)(unsigned max_cpus);
53 void (*smp_send_stop)(void);
54 void (*smp_send_reschedule)(int cpu);
56 void (*send_call_func_ipi)(cpumask_t mask);
57 void (*send_call_func_single_ipi)(int cpu);
60 /* Globals due to paravirt */
61 extern void set_cpu_sibling_map(int cpu);
64 #ifndef CONFIG_PARAVIRT
65 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
67 extern struct smp_ops smp_ops;
69 static inline void smp_send_stop(void)
71 smp_ops.smp_send_stop();
74 static inline void smp_prepare_boot_cpu(void)
76 smp_ops.smp_prepare_boot_cpu();
79 static inline void smp_prepare_cpus(unsigned int max_cpus)
81 smp_ops.smp_prepare_cpus(max_cpus);
84 static inline void smp_cpus_done(unsigned int max_cpus)
86 smp_ops.smp_cpus_done(max_cpus);
89 static inline int __cpu_up(unsigned int cpu)
91 return smp_ops.cpu_up(cpu);
94 static inline void smp_send_reschedule(int cpu)
96 smp_ops.smp_send_reschedule(cpu);
99 static inline void arch_send_call_function_single_ipi(int cpu)
101 smp_ops.send_call_func_single_ipi(cpu);
104 static inline void arch_send_call_function_ipi(cpumask_t mask)
106 smp_ops.send_call_func_ipi(mask);
109 void native_smp_prepare_boot_cpu(void);
110 void native_smp_prepare_cpus(unsigned int max_cpus);
111 void native_smp_cpus_done(unsigned int max_cpus);
112 int native_cpu_up(unsigned int cpunum);
113 void native_send_call_func_ipi(cpumask_t mask);
114 void native_send_call_func_single_ipi(int cpu);
116 extern int __cpu_disable(void);
117 extern void __cpu_die(unsigned int cpu);
119 void smp_store_cpu_info(int id);
120 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
122 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
123 static inline int num_booting_cpus(void)
125 return cpus_weight(cpu_callout_map);
127 #endif /* CONFIG_SMP */
129 #if defined(CONFIG_SMP) && defined(CONFIG_HOTPLUG_CPU)
130 extern void prefill_possible_map(void);
132 static inline void prefill_possible_map(void)
137 extern unsigned disabled_cpus __cpuinitdata;
139 #ifdef CONFIG_X86_32_SMP
141 * This function is needed by all SMP systems. It must _always_ be valid
142 * from the initial startup. We map APIC_BASE very early in page_setup(),
143 * so this is correct in the x86 case.
145 DECLARE_PER_CPU(int, cpu_number);
146 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
147 extern int safe_smp_processor_id(void);
149 #elif defined(CONFIG_X86_64_SMP)
150 #define raw_smp_processor_id() read_pda(cpunumber)
152 #define stack_smp_processor_id() \
154 struct thread_info *ti; \
155 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
158 #define safe_smp_processor_id() smp_processor_id()
160 #else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */
161 #define cpu_physical_id(cpu) boot_cpu_physical_apicid
162 #define safe_smp_processor_id() 0
163 #define stack_smp_processor_id() 0
166 #ifdef CONFIG_X86_LOCAL_APIC
168 static inline int logical_smp_processor_id(void)
170 /* we don't want to mark this access volatile - bad code generation */
171 return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
174 #ifndef CONFIG_X86_64
175 static inline unsigned int read_apic_id(void)
177 return *(u32 *)(APIC_BASE + APIC_ID);
180 extern unsigned int read_apic_id(void);
184 # ifdef APIC_DEFINITION
185 extern int hard_smp_processor_id(void);
187 # include <mach_apicdef.h>
188 static inline int hard_smp_processor_id(void)
190 /* we don't want to mark this access volatile - bad code generation */
191 return GET_APIC_ID(read_apic_id());
193 # endif /* APIC_DEFINITION */
195 #else /* CONFIG_X86_LOCAL_APIC */
198 # define hard_smp_processor_id() 0
201 #endif /* CONFIG_X86_LOCAL_APIC */
203 #ifdef CONFIG_HOTPLUG_CPU
204 extern void cpu_uninit(void);
207 #endif /* __ASSEMBLY__ */