1#ifndef _ASM_X86_SMP_H
2#define _ASM_X86_SMP_H
3#ifndef __ASSEMBLY__
4#include <linux/cpumask.h>
5#include <asm/percpu.h>
6
7/*
8 * We need the APIC definitions automatically as part of 'smp.h'
9 */
10#ifdef CONFIG_X86_LOCAL_APIC
11# include <asm/mpspec.h>
12# include <asm/apic.h>
13# ifdef CONFIG_X86_IO_APIC
14#  include <asm/io_apic.h>
15# endif
16#endif
17#include <asm/thread_info.h>
18#include <asm/cpumask.h>
19#include <asm/cpufeature.h>
20
21extern int smp_num_siblings;
22extern unsigned int num_processors;
23
24static inline bool cpu_has_ht_siblings(void)
25{
26	bool has_siblings = false;
27#ifdef CONFIG_SMP
28	has_siblings = cpu_has_ht && smp_num_siblings > 1;
29#endif
30	return has_siblings;
31}
32
33DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
34DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
35/* cpus sharing the last level cache: */
36DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
37DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
38DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number);
39
40static inline struct cpumask *cpu_llc_shared_mask(int cpu)
41{
42	return per_cpu(cpu_llc_shared_map, cpu);
43}
44
45DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
46DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
47#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
48DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
49#endif
50
51/* Static state in head.S used to set up a CPU */
52extern unsigned long stack_start; /* Initial stack pointer address */
53
54struct task_struct;
55
56struct smp_ops {
57	void (*smp_prepare_boot_cpu)(void);
58	void (*smp_prepare_cpus)(unsigned max_cpus);
59	void (*smp_cpus_done)(unsigned max_cpus);
60
61	void (*stop_other_cpus)(int wait);
62	void (*smp_send_reschedule)(int cpu);
63
64	int (*cpu_up)(unsigned cpu, struct task_struct *tidle);
65	int (*cpu_disable)(void);
66	void (*cpu_die)(unsigned int cpu);
67	void (*play_dead)(void);
68
69	void (*send_call_func_ipi)(const struct cpumask *mask);
70	void (*send_call_func_single_ipi)(int cpu);
71};
72
73/* Globals due to paravirt */
74extern void set_cpu_sibling_map(int cpu);
75
76#ifdef CONFIG_SMP
77#ifndef CONFIG_PARAVIRT
78#define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
79#endif
80extern struct smp_ops smp_ops;
81
82static inline void smp_send_stop(void)
83{
84	smp_ops.stop_other_cpus(0);
85}
86
87static inline void stop_other_cpus(void)
88{
89	smp_ops.stop_other_cpus(1);
90}
91
92static inline void smp_prepare_boot_cpu(void)
93{
94	smp_ops.smp_prepare_boot_cpu();
95}
96
97static inline void smp_prepare_cpus(unsigned int max_cpus)
98{
99	smp_ops.smp_prepare_cpus(max_cpus);
100}
101
102static inline void smp_cpus_done(unsigned int max_cpus)
103{
104	smp_ops.smp_cpus_done(max_cpus);
105}
106
107static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
108{
109	return smp_ops.cpu_up(cpu, tidle);
110}
111
112static inline int __cpu_disable(void)
113{
114	return smp_ops.cpu_disable();
115}
116
117static inline void __cpu_die(unsigned int cpu)
118{
119	smp_ops.cpu_die(cpu);
120}
121
122static inline void play_dead(void)
123{
124	smp_ops.play_dead();
125}
126
127static inline void smp_send_reschedule(int cpu)
128{
129	smp_ops.smp_send_reschedule(cpu);
130}
131
132static inline void arch_send_call_function_single_ipi(int cpu)
133{
134	smp_ops.send_call_func_single_ipi(cpu);
135}
136
137static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
138{
139	smp_ops.send_call_func_ipi(mask);
140}
141
142void cpu_disable_common(void);
143void native_smp_prepare_boot_cpu(void);
144void native_smp_prepare_cpus(unsigned int max_cpus);
145void native_smp_cpus_done(unsigned int max_cpus);
146void common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
147int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
148int native_cpu_disable(void);
149int common_cpu_die(unsigned int cpu);
150void native_cpu_die(unsigned int cpu);
151void native_play_dead(void);
152void play_dead_common(void);
153void wbinvd_on_cpu(int cpu);
154int wbinvd_on_all_cpus(void);
155
156void native_send_call_func_ipi(const struct cpumask *mask);
157void native_send_call_func_single_ipi(int cpu);
158void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
159
160void smp_store_boot_cpu_info(void);
161void smp_store_cpu_info(int id);
162#define cpu_physical_id(cpu)	per_cpu(x86_cpu_to_apicid, cpu)
163
164#else /* !CONFIG_SMP */
165#define wbinvd_on_cpu(cpu)     wbinvd()
166static inline int wbinvd_on_all_cpus(void)
167{
168	wbinvd();
169	return 0;
170}
171#endif /* CONFIG_SMP */
172
173extern unsigned disabled_cpus;
174
175#ifdef CONFIG_X86_32_SMP
176/*
177 * This function is needed by all SMP systems. It must _always_ be valid
178 * from the initial startup. We map APIC_BASE very early in page_setup(),
179 * so this is correct in the x86 case.
180 */
181#define raw_smp_processor_id() (this_cpu_read(cpu_number))
182extern int safe_smp_processor_id(void);
183
184#elif defined(CONFIG_X86_64_SMP)
185#define raw_smp_processor_id() (this_cpu_read(cpu_number))
186
187#define stack_smp_processor_id()					\
188({								\
189	struct thread_info *ti;						\
190	__asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK));	\
191	ti->cpu;							\
192})
193#define safe_smp_processor_id()		smp_processor_id()
194
195#endif
196
197#ifdef CONFIG_X86_LOCAL_APIC
198
199#ifndef CONFIG_X86_64
200static inline int logical_smp_processor_id(void)
201{
202	/* we don't want to mark this access volatile - bad code generation */
203	return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
204}
205
206#endif
207
208extern int hard_smp_processor_id(void);
209
210#else /* CONFIG_X86_LOCAL_APIC */
211
212# ifndef CONFIG_SMP
213#  define hard_smp_processor_id()	0
214# endif
215
216#endif /* CONFIG_X86_LOCAL_APIC */
217
218#ifdef CONFIG_DEBUG_NMI_SELFTEST
219extern void nmi_selftest(void);
220#else
221#define nmi_selftest() do { } while (0)
222#endif
223
224#endif /* __ASSEMBLY__ */
225#endif /* _ASM_X86_SMP_H */
226