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
24 #ifndef __ASSEMBLY__
25
26 #ifdef CONFIG_PPC64
27 #include <asm/paca.h>
28 #endif
29 #include <asm/percpu.h>
30
31 extern int boot_cpuid;
32
33 extern void cpu_die(void);
34
35 #ifdef CONFIG_SMP
36
37 extern void smp_send_debugger_break(int cpu);
38 extern void smp_message_recv(int);
39
40 DECLARE_PER_CPU(unsigned int, pvr);
41
42 #ifdef CONFIG_HOTPLUG_CPU
43 extern void fixup_irqs(cpumask_t map);
44 int generic_cpu_disable(void);
45 int generic_cpu_enable(unsigned int cpu);
46 void generic_cpu_die(unsigned int cpu);
47 void generic_mach_cpu_die(void);
48 #endif
49
50 #ifdef CONFIG_PPC64
51 #define raw_smp_processor_id() (local_paca->paca_index)
52 #define hard_smp_processor_id() (get_paca()->hw_cpu_id)
53 #else
54 /* 32-bit */
55 extern int smp_hw_index[];
56
57 #define raw_smp_processor_id() (current_thread_info()->cpu)
58 #define hard_smp_processor_id() (smp_hw_index[smp_processor_id()])
59
get_hard_smp_processor_id(int cpu)60 static inline int get_hard_smp_processor_id(int cpu)
61 {
62 return smp_hw_index[cpu];
63 }
64
set_hard_smp_processor_id(int cpu,int phys)65 static inline void set_hard_smp_processor_id(int cpu, int phys)
66 {
67 smp_hw_index[cpu] = phys;
68 }
69 #endif
70
71 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
72 DECLARE_PER_CPU(cpumask_t, cpu_core_map);
73 extern int cpu_to_core_id(int cpu);
74
75 /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
76 *
77 * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
78 * in /proc/interrupts will be wrong!!! --Troy */
79 #define PPC_MSG_CALL_FUNCTION 0
80 #define PPC_MSG_RESCHEDULE 1
81 #define PPC_MSG_CALL_FUNC_SINGLE 2
82 #define PPC_MSG_DEBUGGER_BREAK 3
83
84 /*
85 * irq controllers that have dedicated ipis per message and don't
86 * need additional code in the action handler may use this
87 */
88 extern int smp_request_message_ipi(int virq, int message);
89 extern const char *smp_ipi_name[];
90
91 void smp_init_iSeries(void);
92 void smp_init_pSeries(void);
93 void smp_init_cell(void);
94 void smp_init_celleb(void);
95 void smp_setup_cpu_maps(void);
96 void smp_setup_cpu_sibling_map(void);
97
98 extern int __cpu_disable(void);
99 extern void __cpu_die(unsigned int cpu);
100
101 #else
102 /* for UP */
103 #define hard_smp_processor_id() get_hard_smp_processor_id(0)
104 #define smp_setup_cpu_maps()
105
106 #endif /* CONFIG_SMP */
107
108 #ifdef CONFIG_PPC64
get_hard_smp_processor_id(int cpu)109 static inline int get_hard_smp_processor_id(int cpu)
110 {
111 return paca[cpu].hw_cpu_id;
112 }
113
set_hard_smp_processor_id(int cpu,int phys)114 static inline void set_hard_smp_processor_id(int cpu, int phys)
115 {
116 paca[cpu].hw_cpu_id = phys;
117 }
118
119 extern void smp_release_cpus(void);
120
121 #else
122 /* 32-bit */
123 #ifndef CONFIG_SMP
124 extern int boot_cpuid_phys;
get_hard_smp_processor_id(int cpu)125 static inline int get_hard_smp_processor_id(int cpu)
126 {
127 return boot_cpuid_phys;
128 }
129
set_hard_smp_processor_id(int cpu,int phys)130 static inline void set_hard_smp_processor_id(int cpu, int phys)
131 {
132 boot_cpuid_phys = phys;
133 }
134 #endif /* !CONFIG_SMP */
135 #endif /* !CONFIG_PPC64 */
136
137 extern int smt_enabled_at_boot;
138
139 extern int smp_mpic_probe(void);
140 extern void smp_mpic_setup_cpu(int cpu);
141 extern void smp_generic_kick_cpu(int nr);
142
143 extern void smp_generic_give_timebase(void);
144 extern void smp_generic_take_timebase(void);
145
146 extern struct smp_ops_t *smp_ops;
147
148 extern void arch_send_call_function_single_ipi(int cpu);
149 extern void arch_send_call_function_ipi(cpumask_t mask);
150
151 #endif /* __ASSEMBLY__ */
152
153 #endif /* __KERNEL__ */
154 #endif /* _ASM_POWERPC_SMP_H) */
155