1/* SPDX-License-Identifier: GPL-2.0 */
2/* smp.h: Sparc specific SMP stuff.
3 *
4 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
5 */
6
7#ifndef _SPARC_SMP_H
8#define _SPARC_SMP_H
9
10#include <linux/threads.h>
11#include <asm/head.h>
12
13#ifndef __ASSEMBLY__
14
15#include <linux/cpumask.h>
16
17#endif /* __ASSEMBLY__ */
18
19#ifdef CONFIG_SMP
20
21#ifndef __ASSEMBLY__
22
23#include <asm/ptrace.h>
24#include <asm/asi.h>
25#include <linux/atomic.h>
26
27/*
28 *	Private routines/data
29 */
30
31extern unsigned char boot_cpu_id;
32extern volatile unsigned long cpu_callin_map[NR_CPUS];
33extern cpumask_t smp_commenced_mask;
34extern struct linux_prom_registers smp_penguin_ctable;
35
36void cpu_panic(void);
37
38/*
39 *	General functions that each host system must provide.
40 */
41
42void sun4m_init_smp(void);
43void sun4d_init_smp(void);
44
45void smp_callin(void);
46void smp_store_cpu_info(int);
47
48void smp_resched_interrupt(void);
49void smp_call_function_single_interrupt(void);
50void smp_call_function_interrupt(void);
51
52struct seq_file;
53void smp_bogo(struct seq_file *);
54void smp_info(struct seq_file *);
55
56struct sparc32_ipi_ops {
57	void (*cross_call)(void *func, cpumask_t mask, unsigned long arg1,
58			   unsigned long arg2, unsigned long arg3,
59			   unsigned long arg4);
60	void (*resched)(int cpu);
61	void (*single)(int cpu);
62	void (*mask_one)(int cpu);
63};
64extern const struct sparc32_ipi_ops *sparc32_ipi_ops;
65
66static inline void xc0(void *func)
67{
68	sparc32_ipi_ops->cross_call(func, *cpu_online_mask, 0, 0, 0, 0);
69}
70
71static inline void xc1(void *func, unsigned long arg1)
72{
73	sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, 0, 0, 0);
74}
75static inline void xc2(void *func, unsigned long arg1, unsigned long arg2)
76{
77	sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, arg2, 0, 0);
78}
79
80static inline void xc3(void *func, unsigned long arg1, unsigned long arg2,
81		       unsigned long arg3)
82{
83	sparc32_ipi_ops->cross_call(func, *cpu_online_mask,
84				    arg1, arg2, arg3, 0);
85}
86
87static inline void xc4(void *func, unsigned long arg1, unsigned long arg2,
88		       unsigned long arg3, unsigned long arg4)
89{
90	sparc32_ipi_ops->cross_call(func, *cpu_online_mask,
91				    arg1, arg2, arg3, arg4);
92}
93
94void arch_send_call_function_single_ipi(int cpu);
95void arch_send_call_function_ipi_mask(const struct cpumask *mask);
96
97static inline int cpu_logical_map(int cpu)
98{
99	return cpu;
100}
101
102int hard_smp_processor_id(void);
103
104#define raw_smp_processor_id()		(current_thread_info()->cpu)
105
106void smp_setup_cpu_possible_map(void);
107
108#endif /* !(__ASSEMBLY__) */
109
110/* Sparc specific messages. */
111#define MSG_CROSS_CALL         0x0005       /* run func on cpus */
112
113/* Empirical PROM processor mailbox constants.  If the per-cpu mailbox
114 * contains something other than one of these then the ipi is from
115 * Linux's active_kernel_processor.  This facility exists so that
116 * the boot monitor can capture all the other cpus when one catches
117 * a watchdog reset or the user enters the monitor using L1-A keys.
118 */
119#define MBOX_STOPCPU          0xFB
120#define MBOX_IDLECPU          0xFC
121#define MBOX_IDLECPU2         0xFD
122#define MBOX_STOPCPU2         0xFE
123
124#else /* SMP */
125
126#define hard_smp_processor_id()		0
127#define smp_setup_cpu_possible_map() do { } while (0)
128
129#endif /* !(SMP) */
130#endif /* !(_SPARC_SMP_H) */
131