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12#ifndef _ASM_POWERPC_SMP_H
13#define _ASM_POWERPC_SMP_H
14#ifdef __KERNEL__
15
16#include <linux/threads.h>
17#include <linux/cpumask.h>
18#include <linux/kernel.h>
19#include <linux/irqreturn.h>
20
21#ifndef __ASSEMBLY__
22
23#ifdef CONFIG_PPC64
24#include <asm/paca.h>
25#endif
26#include <asm/percpu.h>
27
28extern int boot_cpuid;
29extern int spinning_secondaries;
30extern u32 *cpu_to_phys_id;
31extern bool coregroup_enabled;
32
33extern int cpu_to_chip_id(int cpu);
34extern int *chip_id_lookup_table;
35
36#ifdef CONFIG_SMP
37
38struct smp_ops_t {
39 void (*message_pass)(int cpu, int msg);
40#ifdef CONFIG_PPC_SMP_MUXED_IPI
41 void (*cause_ipi)(int cpu);
42#endif
43 int (*cause_nmi_ipi)(int cpu);
44 void (*probe)(void);
45 int (*kick_cpu)(int nr);
46 int (*prepare_cpu)(int nr);
47 void (*setup_cpu)(int nr);
48 void (*bringup_done)(void);
49 void (*take_timebase)(void);
50 void (*give_timebase)(void);
51 int (*cpu_disable)(void);
52 void (*cpu_die)(unsigned int nr);
53 int (*cpu_bootable)(unsigned int nr);
54#ifdef CONFIG_HOTPLUG_CPU
55 void (*cpu_offline_self)(void);
56#endif
57};
58
59extern int smp_send_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), u64 delay_us);
60extern int smp_send_safe_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), u64 delay_us);
61extern void smp_send_debugger_break(void);
62extern void start_secondary_resume(void);
63extern void smp_generic_give_timebase(void);
64extern void smp_generic_take_timebase(void);
65
66DECLARE_PER_CPU(unsigned int, cpu_pvr);
67
68#ifdef CONFIG_HOTPLUG_CPU
69int generic_cpu_disable(void);
70void generic_cpu_die(unsigned int cpu);
71void generic_set_cpu_dead(unsigned int cpu);
72void generic_set_cpu_up(unsigned int cpu);
73int generic_check_cpu_restart(unsigned int cpu);
74int is_cpu_dead(unsigned int cpu);
75#else
76#define generic_set_cpu_up(i) do { } while (0)
77#endif
78
79#ifdef CONFIG_PPC64
80#define raw_smp_processor_id() (local_paca->paca_index)
81#define hard_smp_processor_id() (get_paca()->hw_cpu_id)
82#else
83
84extern int smp_hw_index[];
85
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95
96
97#ifdef GENERATING_ASM_OFFSETS
98#define raw_smp_processor_id() (0)
99#else
100#define raw_smp_processor_id() (*(unsigned int *)((void *)current + _TASK_CPU))
101#endif
102#define hard_smp_processor_id() (smp_hw_index[smp_processor_id()])
103
104static inline int get_hard_smp_processor_id(int cpu)
105{
106 return smp_hw_index[cpu];
107}
108
109static inline void set_hard_smp_processor_id(int cpu, int phys)
110{
111 smp_hw_index[cpu] = phys;
112}
113#endif
114
115DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
116DECLARE_PER_CPU(cpumask_var_t, cpu_l2_cache_map);
117DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
118DECLARE_PER_CPU(cpumask_var_t, cpu_smallcore_map);
119
120static inline struct cpumask *cpu_sibling_mask(int cpu)
121{
122 return per_cpu(cpu_sibling_map, cpu);
123}
124
125static inline struct cpumask *cpu_core_mask(int cpu)
126{
127 return per_cpu(cpu_core_map, cpu);
128}
129
130static inline struct cpumask *cpu_l2_cache_mask(int cpu)
131{
132 return per_cpu(cpu_l2_cache_map, cpu);
133}
134
135static inline struct cpumask *cpu_smallcore_mask(int cpu)
136{
137 return per_cpu(cpu_smallcore_map, cpu);
138}
139
140extern int cpu_to_core_id(int cpu);
141
142extern bool has_big_cores;
143extern bool thread_group_shares_l2;
144
145#define cpu_smt_mask cpu_smt_mask
146#ifdef CONFIG_SCHED_SMT
147static inline const struct cpumask *cpu_smt_mask(int cpu)
148{
149 if (has_big_cores)
150 return per_cpu(cpu_smallcore_map, cpu);
151
152 return per_cpu(cpu_sibling_map, cpu);
153}
154#endif
155
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159
160#define PPC_MSG_CALL_FUNCTION 0
161#define PPC_MSG_RESCHEDULE 1
162#define PPC_MSG_TICK_BROADCAST 2
163#define PPC_MSG_NMI_IPI 3
164
165
166#define PPC_MSG_RM_HOST_ACTION 4
167
168#define NMI_IPI_ALL_OTHERS -2
169
170#ifdef CONFIG_NMI_IPI
171extern int smp_handle_nmi_ipi(struct pt_regs *regs);
172#else
173static inline int smp_handle_nmi_ipi(struct pt_regs *regs) { return 0; }
174#endif
175
176
177extern int smp_request_message_ipi(int virq, int message);
178extern const char *smp_ipi_name[];
179
180
181extern void smp_muxed_ipi_message_pass(int cpu, int msg);
182extern void smp_muxed_ipi_set_message(int cpu, int msg);
183extern irqreturn_t smp_ipi_demux(void);
184extern irqreturn_t smp_ipi_demux_relaxed(void);
185
186void smp_init_pSeries(void);
187void smp_init_cell(void);
188void smp_setup_cpu_maps(void);
189
190extern int __cpu_disable(void);
191extern void __cpu_die(unsigned int cpu);
192
193#else
194
195#define hard_smp_processor_id() get_hard_smp_processor_id(0)
196#define smp_setup_cpu_maps()
197#define thread_group_shares_l2 0
198static inline void inhibit_secondary_onlining(void) {}
199static inline void uninhibit_secondary_onlining(void) {}
200static inline const struct cpumask *cpu_sibling_mask(int cpu)
201{
202 return cpumask_of(cpu);
203}
204
205static inline const struct cpumask *cpu_smallcore_mask(int cpu)
206{
207 return cpumask_of(cpu);
208}
209
210static inline const struct cpumask *cpu_l2_cache_mask(int cpu)
211{
212 return cpumask_of(cpu);
213}
214#endif
215
216#ifdef CONFIG_PPC64
217static inline int get_hard_smp_processor_id(int cpu)
218{
219 return paca_ptrs[cpu]->hw_cpu_id;
220}
221
222static inline void set_hard_smp_processor_id(int cpu, int phys)
223{
224 paca_ptrs[cpu]->hw_cpu_id = phys;
225}
226#else
227
228#ifndef CONFIG_SMP
229extern int boot_cpuid_phys;
230static inline int get_hard_smp_processor_id(int cpu)
231{
232 return boot_cpuid_phys;
233}
234
235static inline void set_hard_smp_processor_id(int cpu, int phys)
236{
237 boot_cpuid_phys = phys;
238}
239#endif
240#endif
241
242#if defined(CONFIG_PPC64) && (defined(CONFIG_SMP) || defined(CONFIG_KEXEC_CORE))
243extern void smp_release_cpus(void);
244#else
245static inline void smp_release_cpus(void) { }
246#endif
247
248extern int smt_enabled_at_boot;
249
250extern void smp_mpic_probe(void);
251extern void smp_mpic_setup_cpu(int cpu);
252extern int smp_generic_kick_cpu(int nr);
253extern int smp_generic_cpu_bootable(unsigned int nr);
254
255
256extern void smp_generic_give_timebase(void);
257extern void smp_generic_take_timebase(void);
258
259extern struct smp_ops_t *smp_ops;
260
261extern void arch_send_call_function_single_ipi(int cpu);
262extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
263
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267
268extern void generic_secondary_smp_init(void);
269extern unsigned long __secondary_hold_spinloop;
270extern unsigned long __secondary_hold_acknowledge;
271extern char __secondary_hold;
272extern unsigned int booting_thread_hwid;
273
274extern void __early_start(void);
275#endif
276
277#endif
278#endif
279