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1/* smp.h: PPC specific SMP stuff.
2 *
3 * Original was a copy of sparc smp.h. Now heavily modified
4 * for PPC.
5 *
6 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
7 * Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com>
8 */
9#ifdef __KERNEL__
10#ifndef _PPC_SMP_H
11#define _PPC_SMP_H
12
13#include <linux/config.h>
14#include <linux/kernel.h>
15#include <linux/bitops.h>
16#include <linux/errno.h>
17#include <linux/cpumask.h>
18#include <linux/threads.h>
19
20#ifdef CONFIG_SMP
21
22#ifndef __ASSEMBLY__
23
24struct cpuinfo_PPC {
25 unsigned long loops_per_jiffy;
26 unsigned long pvr;
27 unsigned long *pgd_cache;
28 unsigned long *pte_cache;
29 unsigned long pgtable_cache_sz;
30};
31
32extern struct cpuinfo_PPC cpu_data[];
33extern cpumask_t cpu_online_map;
34extern cpumask_t cpu_possible_map;
35extern unsigned long smp_proc_in_lock[];
36extern volatile unsigned long cpu_callin_map[];
37extern int smp_tb_synchronized;
38
39extern void smp_send_tlb_invalidate(int);
40extern void smp_send_xmon_break(int cpu);
41struct pt_regs;
42extern void smp_message_recv(int, struct pt_regs *);
43
44extern int __cpu_disable(void);
45extern void __cpu_die(unsigned int cpu);
46extern void cpu_die(void) __attribute__((noreturn));
47
48#define NO_PROC_ID 0xFF /* No processor magic marker */
49#define PROC_CHANGE_PENALTY 20
50
51#define raw_smp_processor_id() (current_thread_info()->cpu)
52
53extern int __cpu_up(unsigned int cpu);
54
55extern int smp_hw_index[];
56#define hard_smp_processor_id() (smp_hw_index[smp_processor_id()])
57
58struct klock_info_struct {
59 unsigned long kernel_flag;
60 unsigned char akp;
61};
62
63extern struct klock_info_struct klock_info;
64#define KLOCK_HELD 0xffffffff
65#define KLOCK_CLEAR 0x0
66
67#endif /* __ASSEMBLY__ */
68
69#else /* !(CONFIG_SMP) */
70
71static inline void cpu_die(void) { }
72
73#endif /* !(CONFIG_SMP) */
74
75#endif /* !(_PPC_SMP_H) */
76#endif /* __KERNEL__ */