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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;
31
32extern void cpu_die(void);
33extern int cpu_to_chip_id(int cpu);
34
35#ifdef CONFIG_SMP
36
37struct smp_ops_t {
38 void (*message_pass)(int cpu, int msg);
39#ifdef CONFIG_PPC_SMP_MUXED_IPI
40 void (*cause_ipi)(int cpu);
41#endif
42 int (*cause_nmi_ipi)(int cpu);
43 void (*probe)(void);
44 int (*kick_cpu)(int nr);
45 int (*prepare_cpu)(int nr);
46 void (*setup_cpu)(int nr);
47 void (*bringup_done)(void);
48 void (*take_timebase)(void);
49 void (*give_timebase)(void);
50 int (*cpu_disable)(void);
51 void (*cpu_die)(unsigned int nr);
52 int (*cpu_bootable)(unsigned int nr);
53};
54
55extern int smp_send_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), u64 delay_us);
56extern int smp_send_safe_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), u64 delay_us);
57extern void smp_send_debugger_break(void);
58extern void start_secondary_resume(void);
59extern void smp_generic_give_timebase(void);
60extern void smp_generic_take_timebase(void);
61
62DECLARE_PER_CPU(unsigned int, cpu_pvr);
63
64#ifdef CONFIG_HOTPLUG_CPU
65int generic_cpu_disable(void);
66void generic_cpu_die(unsigned int cpu);
67void generic_set_cpu_dead(unsigned int cpu);
68void generic_set_cpu_up(unsigned int cpu);
69int generic_check_cpu_restart(unsigned int cpu);
70int is_cpu_dead(unsigned int cpu);
71#else
72#define generic_set_cpu_up(i) do { } while (0)
73#endif
74
75#ifdef CONFIG_PPC64
76#define raw_smp_processor_id() (local_paca->paca_index)
77#define hard_smp_processor_id() (get_paca()->hw_cpu_id)
78#else
79
80extern int smp_hw_index[];
81
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91
92
93#ifdef GENERATING_ASM_OFFSETS
94#define raw_smp_processor_id() (0)
95#else
96#define raw_smp_processor_id() (*(unsigned int *)((void *)current + _TASK_CPU))
97#endif
98#define hard_smp_processor_id() (smp_hw_index[smp_processor_id()])
99
100static inline int get_hard_smp_processor_id(int cpu)
101{
102 return smp_hw_index[cpu];
103}
104
105static inline void set_hard_smp_processor_id(int cpu, int phys)
106{
107 smp_hw_index[cpu] = phys;
108}
109#endif
110
111DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
112DECLARE_PER_CPU(cpumask_var_t, cpu_l2_cache_map);
113DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
114DECLARE_PER_CPU(cpumask_var_t, cpu_smallcore_map);
115
116static inline struct cpumask *cpu_sibling_mask(int cpu)
117{
118 return per_cpu(cpu_sibling_map, cpu);
119}
120
121static inline struct cpumask *cpu_core_mask(int cpu)
122{
123 return per_cpu(cpu_core_map, cpu);
124}
125
126static inline struct cpumask *cpu_l2_cache_mask(int cpu)
127{
128 return per_cpu(cpu_l2_cache_map, cpu);
129}
130
131static inline struct cpumask *cpu_smallcore_mask(int cpu)
132{
133 return per_cpu(cpu_smallcore_map, cpu);
134}
135
136extern int cpu_to_core_id(int cpu);
137
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141
142#define PPC_MSG_CALL_FUNCTION 0
143#define PPC_MSG_RESCHEDULE 1
144#define PPC_MSG_TICK_BROADCAST 2
145#define PPC_MSG_NMI_IPI 3
146
147
148#define PPC_MSG_RM_HOST_ACTION 4
149
150#define NMI_IPI_ALL_OTHERS -2
151
152#ifdef CONFIG_NMI_IPI
153extern int smp_handle_nmi_ipi(struct pt_regs *regs);
154#else
155static inline int smp_handle_nmi_ipi(struct pt_regs *regs) { return 0; }
156#endif
157
158
159extern int smp_request_message_ipi(int virq, int message);
160extern const char *smp_ipi_name[];
161
162
163extern void smp_muxed_ipi_message_pass(int cpu, int msg);
164extern void smp_muxed_ipi_set_message(int cpu, int msg);
165extern irqreturn_t smp_ipi_demux(void);
166extern irqreturn_t smp_ipi_demux_relaxed(void);
167
168void smp_init_pSeries(void);
169void smp_init_cell(void);
170void smp_setup_cpu_maps(void);
171
172extern int __cpu_disable(void);
173extern void __cpu_die(unsigned int cpu);
174
175#else
176
177#define hard_smp_processor_id() get_hard_smp_processor_id(0)
178#define smp_setup_cpu_maps()
179static inline void inhibit_secondary_onlining(void) {}
180static inline void uninhibit_secondary_onlining(void) {}
181static inline const struct cpumask *cpu_sibling_mask(int cpu)
182{
183 return cpumask_of(cpu);
184}
185
186static inline const struct cpumask *cpu_smallcore_mask(int cpu)
187{
188 return cpumask_of(cpu);
189}
190
191#endif
192
193#ifdef CONFIG_PPC64
194static inline int get_hard_smp_processor_id(int cpu)
195{
196 return paca_ptrs[cpu]->hw_cpu_id;
197}
198
199static inline void set_hard_smp_processor_id(int cpu, int phys)
200{
201 paca_ptrs[cpu]->hw_cpu_id = phys;
202}
203#else
204
205#ifndef CONFIG_SMP
206extern int boot_cpuid_phys;
207static inline int get_hard_smp_processor_id(int cpu)
208{
209 return boot_cpuid_phys;
210}
211
212static inline void set_hard_smp_processor_id(int cpu, int phys)
213{
214 boot_cpuid_phys = phys;
215}
216#endif
217#endif
218
219#if defined(CONFIG_PPC64) && (defined(CONFIG_SMP) || defined(CONFIG_KEXEC_CORE))
220extern void smp_release_cpus(void);
221#else
222static inline void smp_release_cpus(void) { };
223#endif
224
225extern int smt_enabled_at_boot;
226
227extern void smp_mpic_probe(void);
228extern void smp_mpic_setup_cpu(int cpu);
229extern int smp_generic_kick_cpu(int nr);
230extern int smp_generic_cpu_bootable(unsigned int nr);
231
232
233extern void smp_generic_give_timebase(void);
234extern void smp_generic_take_timebase(void);
235
236extern struct smp_ops_t *smp_ops;
237
238extern void arch_send_call_function_single_ipi(int cpu);
239extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
240
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244
245extern void generic_secondary_smp_init(void);
246extern void generic_secondary_thread_init(void);
247extern unsigned long __secondary_hold_spinloop;
248extern unsigned long __secondary_hold_acknowledge;
249extern char __secondary_hold;
250extern unsigned int booting_thread_hwid;
251
252extern void __early_start(void);
253#endif
254
255#endif
256#endif
257