1/* smp.h: Sparc specific SMP stuff.
2 *
3 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
4 */
5
6#ifndef _SPARC_SMP_H
7#define _SPARC_SMP_H
8
9#include <linux/threads.h>
10#include <asm/head.h>
11
12#ifndef __ASSEMBLY__
13
14#include <linux/cpumask.h>
15
16#endif /* __ASSEMBLY__ */
17
18#ifdef CONFIG_SMP
19
20#ifndef __ASSEMBLY__
21
22#include <asm/ptrace.h>
23#include <asm/asi.h>
24#include <linux/atomic.h>
25
26/*
27 *	Private routines/data
28 */
29
30extern unsigned char boot_cpu_id;
31extern volatile unsigned long cpu_callin_map[NR_CPUS];
32extern cpumask_t smp_commenced_mask;
33extern struct linux_prom_registers smp_penguin_ctable;
34
35typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long,
36		       unsigned long, unsigned long);
37
38void cpu_panic(void);
39
40/*
41 *	General functions that each host system must provide.
42 */
43
44void sun4m_init_smp(void);
45void sun4d_init_smp(void);
46
47void smp_callin(void);
48void smp_store_cpu_info(int);
49
50void smp_resched_interrupt(void);
51void smp_call_function_single_interrupt(void);
52void smp_call_function_interrupt(void);
53
54struct seq_file;
55void smp_bogo(struct seq_file *);
56void smp_info(struct seq_file *);
57
58struct sparc32_ipi_ops {
59	void (*cross_call)(smpfunc_t func, cpumask_t mask, unsigned long arg1,
60			   unsigned long arg2, unsigned long arg3,
61			   unsigned long arg4);
62	void (*resched)(int cpu);
63	void (*single)(int cpu);
64	void (*mask_one)(int cpu);
65};
66extern const struct sparc32_ipi_ops *sparc32_ipi_ops;
67
68static inline void xc0(smpfunc_t func)
69{
70	sparc32_ipi_ops->cross_call(func, *cpu_online_mask, 0, 0, 0, 0);
71}
72
73static inline void xc1(smpfunc_t func, unsigned long arg1)
74{
75	sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, 0, 0, 0);
76}
77static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
78{
79	sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, arg2, 0, 0);
80}
81
82static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2,
83		       unsigned long arg3)
84{
85	sparc32_ipi_ops->cross_call(func, *cpu_online_mask,
86				    arg1, arg2, arg3, 0);
87}
88
89static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2,
90		       unsigned long arg3, unsigned long arg4)
91{
92	sparc32_ipi_ops->cross_call(func, *cpu_online_mask,
93				    arg1, arg2, arg3, arg4);
94}
95
96void arch_send_call_function_single_ipi(int cpu);
97void arch_send_call_function_ipi_mask(const struct cpumask *mask);
98
99static inline int cpu_logical_map(int cpu)
100{
101	return cpu;
102}
103
104int hard_smp_processor_id(void);
105
106#define raw_smp_processor_id()		(current_thread_info()->cpu)
107
108void smp_setup_cpu_possible_map(void);
109
110#endif /* !(__ASSEMBLY__) */
111
112/* Sparc specific messages. */
113#define MSG_CROSS_CALL         0x0005       /* run func on cpus */
114
115/* Empirical PROM processor mailbox constants.  If the per-cpu mailbox
116 * contains something other than one of these then the ipi is from
117 * Linux's active_kernel_processor.  This facility exists so that
118 * the boot monitor can capture all the other cpus when one catches
119 * a watchdog reset or the user enters the monitor using L1-A keys.
120 */
121#define MBOX_STOPCPU          0xFB
122#define MBOX_IDLECPU          0xFC
123#define MBOX_IDLECPU2         0xFD
124#define MBOX_STOPCPU2         0xFE
125
126#else /* SMP */
127
128#define hard_smp_processor_id()		0
129#define smp_setup_cpu_possible_map() do { } while (0)
130
131#endif /* !(SMP) */
132#endif /* !(_SPARC_SMP_H) */
133