1 /*
2 * smp.h: PowerPC-specific SMP code.
3 *
4 * Original was a copy of sparc smp.h. Now heavily modified
5 * for PPC.
6 *
7 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
8 * Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 */
15
16 #ifndef _ASM_POWERPC_SMP_H
17 #define _ASM_POWERPC_SMP_H
18 #ifdef __KERNEL__
19
20 #include <linux/threads.h>
21 #include <linux/cpumask.h>
22 #include <linux/kernel.h>
23 #include <linux/irqreturn.h>
24
25 #ifndef __ASSEMBLY__
26
27 #ifdef CONFIG_PPC64
28 #include <asm/paca.h>
29 #endif
30 #include <asm/percpu.h>
31
32 extern int boot_cpuid;
33 extern int spinning_secondaries;
34
35 extern void cpu_die(void);
36 extern int cpu_to_chip_id(int cpu);
37
38 #ifdef CONFIG_SMP
39
40 struct smp_ops_t {
41 void (*message_pass)(int cpu, int msg);
42 #ifdef CONFIG_PPC_SMP_MUXED_IPI
43 void (*cause_ipi)(int cpu, unsigned long data);
44 #endif
45 int (*probe)(void);
46 int (*kick_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 };
55
56 extern void smp_send_debugger_break(void);
57 extern void start_secondary_resume(void);
58 extern void smp_generic_give_timebase(void);
59 extern void smp_generic_take_timebase(void);
60
61 DECLARE_PER_CPU(unsigned int, cpu_pvr);
62
63 #ifdef CONFIG_HOTPLUG_CPU
64 extern void migrate_irqs(void);
65 int generic_cpu_disable(void);
66 void generic_cpu_die(unsigned int cpu);
67 void generic_mach_cpu_die(void);
68 void generic_set_cpu_dead(unsigned int cpu);
69 void generic_set_cpu_up(unsigned int cpu);
70 int generic_check_cpu_restart(unsigned int cpu);
71 #endif
72
73 #ifdef CONFIG_PPC64
74 #define raw_smp_processor_id() (local_paca->paca_index)
75 #define hard_smp_processor_id() (get_paca()->hw_cpu_id)
76 #else
77 /* 32-bit */
78 extern int smp_hw_index[];
79
80 #define raw_smp_processor_id() (current_thread_info()->cpu)
81 #define hard_smp_processor_id() (smp_hw_index[smp_processor_id()])
82
get_hard_smp_processor_id(int cpu)83 static inline int get_hard_smp_processor_id(int cpu)
84 {
85 return smp_hw_index[cpu];
86 }
87
set_hard_smp_processor_id(int cpu,int phys)88 static inline void set_hard_smp_processor_id(int cpu, int phys)
89 {
90 smp_hw_index[cpu] = phys;
91 }
92 #endif
93
94 DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
95 DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
96
cpu_sibling_mask(int cpu)97 static inline struct cpumask *cpu_sibling_mask(int cpu)
98 {
99 return per_cpu(cpu_sibling_map, cpu);
100 }
101
cpu_core_mask(int cpu)102 static inline struct cpumask *cpu_core_mask(int cpu)
103 {
104 return per_cpu(cpu_core_map, cpu);
105 }
106
107 extern int cpu_to_core_id(int cpu);
108
109 /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
110 *
111 * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
112 * in /proc/interrupts will be wrong!!! --Troy */
113 #define PPC_MSG_CALL_FUNCTION 0
114 #define PPC_MSG_RESCHEDULE 1
115 #define PPC_MSG_TICK_BROADCAST 2
116 #define PPC_MSG_DEBUGGER_BREAK 3
117
118 /* for irq controllers that have dedicated ipis per message (4) */
119 extern int smp_request_message_ipi(int virq, int message);
120 extern const char *smp_ipi_name[];
121
122 /* for irq controllers with only a single ipi */
123 extern void smp_muxed_ipi_set_data(int cpu, unsigned long data);
124 extern void smp_muxed_ipi_message_pass(int cpu, int msg);
125 extern irqreturn_t smp_ipi_demux(void);
126
127 void smp_init_pSeries(void);
128 void smp_init_cell(void);
129 void smp_init_celleb(void);
130 void smp_setup_cpu_maps(void);
131
132 extern int __cpu_disable(void);
133 extern void __cpu_die(unsigned int cpu);
134
135 #else
136 /* for UP */
137 #define hard_smp_processor_id() get_hard_smp_processor_id(0)
138 #define smp_setup_cpu_maps()
inhibit_secondary_onlining(void)139 static inline void inhibit_secondary_onlining(void) {}
uninhibit_secondary_onlining(void)140 static inline void uninhibit_secondary_onlining(void) {}
cpu_sibling_mask(int cpu)141 static inline const struct cpumask *cpu_sibling_mask(int cpu)
142 {
143 return cpumask_of(cpu);
144 }
145
146 #endif /* CONFIG_SMP */
147
148 #ifdef CONFIG_PPC64
get_hard_smp_processor_id(int cpu)149 static inline int get_hard_smp_processor_id(int cpu)
150 {
151 return paca[cpu].hw_cpu_id;
152 }
153
set_hard_smp_processor_id(int cpu,int phys)154 static inline void set_hard_smp_processor_id(int cpu, int phys)
155 {
156 paca[cpu].hw_cpu_id = phys;
157 }
158
159 extern void smp_release_cpus(void);
160
161 #else
162 /* 32-bit */
163 #ifndef CONFIG_SMP
164 extern int boot_cpuid_phys;
get_hard_smp_processor_id(int cpu)165 static inline int get_hard_smp_processor_id(int cpu)
166 {
167 return boot_cpuid_phys;
168 }
169
set_hard_smp_processor_id(int cpu,int phys)170 static inline void set_hard_smp_processor_id(int cpu, int phys)
171 {
172 boot_cpuid_phys = phys;
173 }
174 #endif /* !CONFIG_SMP */
175 #endif /* !CONFIG_PPC64 */
176
177 extern int smt_enabled_at_boot;
178
179 extern int smp_mpic_probe(void);
180 extern void smp_mpic_setup_cpu(int cpu);
181 extern int smp_generic_kick_cpu(int nr);
182 extern int smp_generic_cpu_bootable(unsigned int nr);
183
184
185 extern void smp_generic_give_timebase(void);
186 extern void smp_generic_take_timebase(void);
187
188 extern struct smp_ops_t *smp_ops;
189
190 extern void arch_send_call_function_single_ipi(int cpu);
191 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
192
193 /* Definitions relative to the secondary CPU spin loop
194 * and entry point. Not all of them exist on both 32 and
195 * 64-bit but defining them all here doesn't harm
196 */
197 extern void generic_secondary_smp_init(void);
198 extern void generic_secondary_thread_init(void);
199 extern unsigned long __secondary_hold_spinloop;
200 extern unsigned long __secondary_hold_acknowledge;
201 extern char __secondary_hold;
202
203 extern void __early_start(void);
204 #endif /* __ASSEMBLY__ */
205
206 #endif /* __KERNEL__ */
207 #endif /* _ASM_POWERPC_SMP_H) */
208