xref: /openbmc/linux/arch/sparc/include/asm/smp_32.h (revision 23c2b932)
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 
30 extern unsigned char boot_cpu_id;
31 extern volatile unsigned long cpu_callin_map[NR_CPUS];
32 extern cpumask_t smp_commenced_mask;
33 extern struct linux_prom_registers smp_penguin_ctable;
34 
35 typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long,
36 		       unsigned long, unsigned long);
37 
38 void cpu_panic(void);
39 
40 /*
41  *	General functions that each host system must provide.
42  */
43 
44 void sun4m_init_smp(void);
45 void sun4d_init_smp(void);
46 
47 void smp_callin(void);
48 void smp_store_cpu_info(int);
49 
50 void smp_resched_interrupt(void);
51 void smp_call_function_single_interrupt(void);
52 void smp_call_function_interrupt(void);
53 
54 struct seq_file;
55 void smp_bogo(struct seq_file *);
56 void smp_info(struct seq_file *);
57 
58 struct 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 };
66 extern const struct sparc32_ipi_ops *sparc32_ipi_ops;
67 
68 static inline void xc0(smpfunc_t func)
69 {
70 	sparc32_ipi_ops->cross_call(func, *cpu_online_mask, 0, 0, 0, 0);
71 }
72 
73 static 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 }
77 static 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 
82 static 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 
89 static 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 
96 void arch_send_call_function_single_ipi(int cpu);
97 void arch_send_call_function_ipi_mask(const struct cpumask *mask);
98 
99 static inline int cpu_logical_map(int cpu)
100 {
101 	return cpu;
102 }
103 
104 int hard_smp_processor_id(void);
105 
106 #define raw_smp_processor_id()		(current_thread_info()->cpu)
107 
108 void 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