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H. Peter Anvin1965aae2008-10-22 22:26:29 -07001#ifndef _ASM_X86_SMP_H
2#define _ASM_X86_SMP_H
Glauber Costac27cfef2008-03-03 14:12:29 -03003#ifndef __ASSEMBLY__
Glauber Costa53ebef42008-03-03 14:12:31 -03004#include <linux/cpumask.h>
Glauber Costa93b016f2008-03-03 14:12:40 -03005#include <linux/init.h>
Glauber de Oliveira Costa7e1efc02008-03-19 14:25:18 -03006#include <asm/percpu.h>
Glauber Costa53ebef42008-03-03 14:12:31 -03007
Glauber Costab23dab02008-03-27 14:06:00 -03008/*
9 * We need the APIC definitions automatically as part of 'smp.h'
10 */
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>
16# endif
17#endif
Glauber Costab23dab02008-03-27 14:06:00 -030018#include <asm/thread_info.h>
Jaswinder Singh Rajputfb8fd072009-01-10 12:20:24 +053019#include <asm/cpumask.h>
Glauber Costab23dab02008-03-27 14:06:00 -030020
Glauber Costa53ebef42008-03-03 14:12:31 -030021extern int smp_num_siblings;
22extern unsigned int num_processors;
Glauber Costac27cfef2008-03-03 14:12:29 -030023
Rusty Russell7ad728f2009-03-13 14:49:50 +103024DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
25DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
Glauber de Oliveira Costa7e1efc02008-03-19 14:25:18 -030026DECLARE_PER_CPU(u16, cpu_llc_id);
Jaswinder Singhfb261322008-07-21 21:36:40 +053027DECLARE_PER_CPU(int, cpu_number);
Mike Travis23ca4bb2008-05-12 21:21:12 +020028
Mike Travisc2d1cec2009-01-04 05:18:03 -080029static inline struct cpumask *cpu_sibling_mask(int cpu)
30{
Rusty Russell7ad728f2009-03-13 14:49:50 +103031 return per_cpu(cpu_sibling_map, cpu);
Mike Travisc2d1cec2009-01-04 05:18:03 -080032}
33
34static inline struct cpumask *cpu_core_mask(int cpu)
35{
Rusty Russell7ad728f2009-03-13 14:49:50 +103036 return per_cpu(cpu_core_map, cpu);
Mike Travisc2d1cec2009-01-04 05:18:03 -080037}
38
Mike Travis23ca4bb2008-05-12 21:21:12 +020039DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid);
40DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
Glauber de Oliveira Costa7e1efc02008-03-19 14:25:18 -030041
Glauber de Oliveira Costa9d97d0d2008-03-19 14:25:57 -030042/* Static state in head.S used to set up a CPU */
43extern struct {
44 void *sp;
45 unsigned short ss;
46} stack_start;
47
Glauber Costa16694022008-03-03 14:12:32 -030048struct smp_ops {
49 void (*smp_prepare_boot_cpu)(void);
50 void (*smp_prepare_cpus)(unsigned max_cpus);
Glauber Costa16694022008-03-03 14:12:32 -030051 void (*smp_cpus_done)(unsigned max_cpus);
52
53 void (*smp_send_stop)(void);
54 void (*smp_send_reschedule)(int cpu);
Jens Axboe3b16cf82008-06-26 11:21:54 +020055
Alex Nixon93be71b2008-08-22 11:52:11 +010056 int (*cpu_up)(unsigned cpu);
57 int (*cpu_disable)(void);
58 void (*cpu_die)(unsigned int cpu);
59 void (*play_dead)(void);
60
Mike Travisbcda0162008-12-16 17:33:59 -080061 void (*send_call_func_ipi)(const struct cpumask *mask);
Jens Axboe3b16cf82008-06-26 11:21:54 +020062 void (*send_call_func_single_ipi)(int cpu);
Glauber Costa16694022008-03-03 14:12:32 -030063};
64
Glauber Costa14522072008-03-03 14:12:59 -030065/* Globals due to paravirt */
66extern void set_cpu_sibling_map(int cpu);
67
Glauber Costac76cb362008-03-03 14:12:33 -030068#ifdef CONFIG_SMP
Glauber de Oliveira Costad0173ae2008-03-19 14:24:59 -030069#ifndef CONFIG_PARAVIRT
70#define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
71#endif
Glauber Costac76cb362008-03-03 14:12:33 -030072extern struct smp_ops smp_ops;
Glauber Costa86789692008-03-03 14:12:34 -030073
Glauber Costa377d6982008-03-03 14:12:51 -030074static inline void smp_send_stop(void)
75{
76 smp_ops.smp_send_stop();
77}
78
Glauber Costa1e3fac82008-03-03 14:12:37 -030079static inline void smp_prepare_boot_cpu(void)
80{
81 smp_ops.smp_prepare_boot_cpu();
82}
83
Glauber Costa7557da62008-03-03 14:12:38 -030084static inline void smp_prepare_cpus(unsigned int max_cpus)
85{
86 smp_ops.smp_prepare_cpus(max_cpus);
87}
88
Glauber Costac5597642008-03-03 14:12:39 -030089static inline void smp_cpus_done(unsigned int max_cpus)
90{
91 smp_ops.smp_cpus_done(max_cpus);
92}
93
Glauber Costa71d19542008-03-03 14:12:36 -030094static inline int __cpu_up(unsigned int cpu)
95{
96 return smp_ops.cpu_up(cpu);
97}
98
Alex Nixon93be71b2008-08-22 11:52:11 +010099static inline int __cpu_disable(void)
100{
101 return smp_ops.cpu_disable();
102}
103
104static inline void __cpu_die(unsigned int cpu)
105{
106 smp_ops.cpu_die(cpu);
107}
108
109static inline void play_dead(void)
110{
111 smp_ops.play_dead();
112}
113
Glauber Costa86789692008-03-03 14:12:34 -0300114static inline void smp_send_reschedule(int cpu)
115{
116 smp_ops.smp_send_reschedule(cpu);
117}
Glauber Costa64b1a21e02008-03-03 14:12:35 -0300118
Jens Axboe3b16cf82008-06-26 11:21:54 +0200119static inline void arch_send_call_function_single_ipi(int cpu)
Glauber Costa64b1a21e02008-03-03 14:12:35 -0300120{
Jens Axboe3b16cf82008-06-26 11:21:54 +0200121 smp_ops.send_call_func_single_ipi(cpu);
122}
123
Rusty Russellb643dec2009-03-13 14:49:51 +1030124#define arch_send_call_function_ipi_mask arch_send_call_function_ipi_mask
125static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
Jens Axboe3b16cf82008-06-26 11:21:54 +0200126{
Rusty Russellb643dec2009-03-13 14:49:51 +1030127 smp_ops.send_call_func_ipi(mask);
Glauber Costa64b1a21e02008-03-03 14:12:35 -0300128}
Glauber Costa71d19542008-03-03 14:12:36 -0300129
Alex Nixon8227dce2008-08-22 11:52:14 +0100130void cpu_disable_common(void);
Glauber Costa1e3fac82008-03-03 14:12:37 -0300131void native_smp_prepare_boot_cpu(void);
Glauber Costa7557da62008-03-03 14:12:38 -0300132void native_smp_prepare_cpus(unsigned int max_cpus);
Glauber Costac5597642008-03-03 14:12:39 -0300133void native_smp_cpus_done(unsigned int max_cpus);
Glauber Costa71d19542008-03-03 14:12:36 -0300134int native_cpu_up(unsigned int cpunum);
Alex Nixon93be71b2008-08-22 11:52:11 +0100135int native_cpu_disable(void);
136void native_cpu_die(unsigned int cpu);
137void native_play_dead(void);
Alex Nixona21f5d882008-08-22 11:52:13 +0100138void play_dead_common(void);
Alex Nixon93be71b2008-08-22 11:52:11 +0100139
Mike Travisbcda0162008-12-16 17:33:59 -0800140void native_send_call_func_ipi(const struct cpumask *mask);
Jens Axboe3b16cf82008-06-26 11:21:54 +0200141void native_send_call_func_single_ipi(int cpu);
Glauber Costa93b016f2008-03-03 14:12:40 -0300142
Glauber de Oliveira Costa1d89a7f2008-03-19 14:25:05 -0300143void smp_store_cpu_info(int id);
Glauber de Oliveira Costac70dcb72008-03-19 14:25:58 -0300144#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
Glauber Costaa9c057c2008-03-27 14:06:02 -0300145
146/* We don't mark CPUs online until __cpu_up(), so we need another measure */
147static inline int num_booting_cpus(void)
148{
Mike Travisc2d1cec2009-01-04 05:18:03 -0800149 return cpumask_weight(cpu_callout_mask);
Glauber Costaa9c057c2008-03-27 14:06:02 -0300150}
Chuck Ebbert14adf852008-09-29 18:29:42 -0400151#endif /* CONFIG_SMP */
Glauber Costaa9c057c2008-03-27 14:06:02 -0300152
Alexey Starikovskiy2fe60142008-04-04 23:41:44 +0400153extern unsigned disabled_cpus __cpuinitdata;
154
Glauber Costaa9c057c2008-03-27 14:06:02 -0300155#ifdef CONFIG_X86_32_SMP
156/*
157 * This function is needed by all SMP systems. It must _always_ be valid
158 * from the initial startup. We map APIC_BASE very early in page_setup(),
159 * so this is correct in the x86 case.
160 */
Ingo Molnar6dbde352009-01-15 22:15:53 +0900161#define raw_smp_processor_id() (percpu_read(cpu_number))
Glauber Costaa9c057c2008-03-27 14:06:02 -0300162extern int safe_smp_processor_id(void);
163
164#elif defined(CONFIG_X86_64_SMP)
Brian Gerstea927902009-01-19 00:38:58 +0900165#define raw_smp_processor_id() (percpu_read(cpu_number))
Glauber Costaa9c057c2008-03-27 14:06:02 -0300166
167#define stack_smp_processor_id() \
168({ \
169 struct thread_info *ti; \
170 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
171 ti->cpu; \
172})
173#define safe_smp_processor_id() smp_processor_id()
174
Glauber Costac76cb362008-03-03 14:12:33 -0300175#endif
Glauber Costa16694022008-03-03 14:12:32 -0300176
Glauber Costa1b000842008-03-27 14:05:58 -0300177#ifdef CONFIG_X86_LOCAL_APIC
178
Suresh Siddha1b374e42008-07-10 11:16:49 -0700179#ifndef CONFIG_X86_64
Glauber Costa1b000842008-03-27 14:05:58 -0300180static inline int logical_smp_processor_id(void)
181{
182 /* we don't want to mark this access volatile - bad code generation */
183 return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
184}
185
Jack Steinerac23d4e2008-03-28 14:12:16 -0500186#endif
187
Glauber Costa1b000842008-03-27 14:05:58 -0300188extern int hard_smp_processor_id(void);
Glauber Costa1b000842008-03-27 14:05:58 -0300189
190#else /* CONFIG_X86_LOCAL_APIC */
191
192# ifndef CONFIG_SMP
193# define hard_smp_processor_id() 0
194# endif
195
196#endif /* CONFIG_X86_LOCAL_APIC */
197
Glauber Costac27cfef2008-03-03 14:12:29 -0300198#endif /* __ASSEMBLY__ */
H. Peter Anvin1965aae2008-10-22 22:26:29 -0700199#endif /* _ASM_X86_SMP_H */