1#ifndef _ASM_X86_SMP_H
2#define _ASM_X86_SMP_H
3#ifndef __ASSEMBLY__
4#include <linux/cpumask.h>
5#include <linux/init.h>
6#include <asm/percpu.h>
7
8/*
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
18#include <asm/thread_info.h>
19#include <asm/cpumask.h>
20#include <asm/cpufeature.h>
21
22extern int smp_num_siblings;
23extern unsigned int num_processors;
24
25static inline bool cpu_has_ht_siblings(void)
26{
27	bool has_siblings = false;
28#ifdef CONFIG_SMP
29	has_siblings = cpu_has_ht && smp_num_siblings > 1;
30#endif
31	return has_siblings;
32}
33
34DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
35DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
36/* cpus sharing the last level cache: */
37DECLARE_PER_CPU(cpumask_var_t, cpu_llc_shared_map);
38DECLARE_PER_CPU(u16, cpu_llc_id);
39DECLARE_PER_CPU(int, cpu_number);
40
41static inline struct cpumask *cpu_sibling_mask(int cpu)
42{
43	return per_cpu(cpu_sibling_map, cpu);
44}
45
46static inline struct cpumask *cpu_core_mask(int cpu)
47{
48	return per_cpu(cpu_core_map, cpu);
49}
50
51static inline struct cpumask *cpu_llc_shared_mask(int cpu)
52{
53	return per_cpu(cpu_llc_shared_map, cpu);
54}
55
56DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid);
57DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
58#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
59DECLARE_EARLY_PER_CPU(int, x86_cpu_to_logical_apicid);
60#endif
61
62/* Static state in head.S used to set up a CPU */
63extern unsigned long stack_start; /* Initial stack pointer address */
64
65struct smp_ops {
66	void (*smp_prepare_boot_cpu)(void);
67	void (*smp_prepare_cpus)(unsigned max_cpus);
68	void (*smp_cpus_done)(unsigned max_cpus);
69
70	void (*stop_other_cpus)(int wait);
71	void (*smp_send_reschedule)(int cpu);
72
73	int (*cpu_up)(unsigned cpu);
74	int (*cpu_disable)(void);
75	void (*cpu_die)(unsigned int cpu);
76	void (*play_dead)(void);
77
78	void (*send_call_func_ipi)(const struct cpumask *mask);
79	void (*send_call_func_single_ipi)(int cpu);
80};
81
82/* Globals due to paravirt */
83extern void set_cpu_sibling_map(int cpu);
84
85#ifdef CONFIG_SMP
86#ifndef CONFIG_PARAVIRT
87#define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
88#endif
89extern struct smp_ops smp_ops;
90
91static inline void smp_send_stop(void)
92{
93	smp_ops.stop_other_cpus(0);
94}
95
96static inline void stop_other_cpus(void)
97{
98	smp_ops.stop_other_cpus(1);
99}
100
101static inline void smp_prepare_boot_cpu(void)
102{
103	smp_ops.smp_prepare_boot_cpu();
104}
105
106static inline void smp_prepare_cpus(unsigned int max_cpus)
107{
108	smp_ops.smp_prepare_cpus(max_cpus);
109}
110
111static inline void smp_cpus_done(unsigned int max_cpus)
112{
113	smp_ops.smp_cpus_done(max_cpus);
114}
115
116static inline int __cpu_up(unsigned int cpu)
117{
118	return smp_ops.cpu_up(cpu);
119}
120
121static inline int __cpu_disable(void)
122{
123	return smp_ops.cpu_disable();
124}
125
126static inline void __cpu_die(unsigned int cpu)
127{
128	smp_ops.cpu_die(cpu);
129}
130
131static inline void play_dead(void)
132{
133	smp_ops.play_dead();
134}
135
136static inline void smp_send_reschedule(int cpu)
137{
138	smp_ops.smp_send_reschedule(cpu);
139}
140
141static inline void arch_send_call_function_single_ipi(int cpu)
142{
143	smp_ops.send_call_func_single_ipi(cpu);
144}
145
146static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
147{
148	smp_ops.send_call_func_ipi(mask);
149}
150
151void cpu_disable_common(void);
152void native_smp_prepare_boot_cpu(void);
153void native_smp_prepare_cpus(unsigned int max_cpus);
154void native_smp_cpus_done(unsigned int max_cpus);
155int native_cpu_up(unsigned int cpunum);
156int native_cpu_disable(void);
157void native_cpu_die(unsigned int cpu);
158void native_play_dead(void);
159void play_dead_common(void);
160void wbinvd_on_cpu(int cpu);
161int wbinvd_on_all_cpus(void);
162
163void native_send_call_func_ipi(const struct cpumask *mask);
164void native_send_call_func_single_ipi(int cpu);
165
166void smp_store_cpu_info(int id);
167#define cpu_physical_id(cpu)	per_cpu(x86_cpu_to_apicid, cpu)
168
169/* We don't mark CPUs online until __cpu_up(), so we need another measure */
170static inline int num_booting_cpus(void)
171{
172	return cpumask_weight(cpu_callout_mask);
173}
174#else /* !CONFIG_SMP */
175#define wbinvd_on_cpu(cpu)     wbinvd()
176static inline int wbinvd_on_all_cpus(void)
177{
178	wbinvd();
179	return 0;
180}
181#endif /* CONFIG_SMP */
182
183extern unsigned disabled_cpus __cpuinitdata;
184
185#ifdef CONFIG_X86_32_SMP
186/*
187 * This function is needed by all SMP systems. It must _always_ be valid
188 * from the initial startup. We map APIC_BASE very early in page_setup(),
189 * so this is correct in the x86 case.
190 */
191#define raw_smp_processor_id() (percpu_read(cpu_number))
192extern int safe_smp_processor_id(void);
193
194#elif defined(CONFIG_X86_64_SMP)
195#define raw_smp_processor_id() (percpu_read(cpu_number))
196
197#define stack_smp_processor_id()					\
198({								\
199	struct thread_info *ti;						\
200	__asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK));	\
201	ti->cpu;							\
202})
203#define safe_smp_processor_id()		smp_processor_id()
204
205#endif
206
207#ifdef CONFIG_X86_LOCAL_APIC
208
209#ifndef CONFIG_X86_64
210static inline int logical_smp_processor_id(void)
211{
212	/* we don't want to mark this access volatile - bad code generation */
213	return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
214}
215
216#endif
217
218extern int hard_smp_processor_id(void);
219
220#else /* CONFIG_X86_LOCAL_APIC */
221
222# ifndef CONFIG_SMP
223#  define hard_smp_processor_id()	0
224# endif
225
226#endif /* CONFIG_X86_LOCAL_APIC */
227
228#ifdef CONFIG_DEBUG_NMI_SELFTEST
229extern void nmi_selftest(void);
230#else
231#define nmi_selftest() do { } while (0)
232#endif
233
234#endif /* __ASSEMBLY__ */
235#endif /* _ASM_X86_SMP_H */
236