Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6
[pandora-kernel.git] / arch / arm / include / asm / proc-fns.h
1 /*
2  *  arch/arm/include/asm/proc-fns.h
3  *
4  *  Copyright (C) 1997-1999 Russell King
5  *  Copyright (C) 2000 Deep Blue Solutions Ltd
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  */
11 #ifndef __ASM_PROCFNS_H
12 #define __ASM_PROCFNS_H
13
14 #ifdef __KERNEL__
15
16 #include <asm/glue-proc.h>
17 #include <asm/page.h>
18
19 #ifndef __ASSEMBLY__
20
21 struct mm_struct;
22
23 /*
24  * Don't change this structure - ASM code relies on it.
25  */
26 extern struct processor {
27         /* MISC
28          * get data abort address/flags
29          */
30         void (*_data_abort)(unsigned long pc);
31         /*
32          * Retrieve prefetch fault address
33          */
34         unsigned long (*_prefetch_abort)(unsigned long lr);
35         /*
36          * Set up any processor specifics
37          */
38         void (*_proc_init)(void);
39         /*
40          * Disable any processor specifics
41          */
42         void (*_proc_fin)(void);
43         /*
44          * Special stuff for a reset
45          */
46         void (*reset)(unsigned long addr) __attribute__((noreturn));
47         /*
48          * Idle the processor
49          */
50         int (*_do_idle)(void);
51         /*
52          * Processor architecture specific
53          */
54         /*
55          * clean a virtual address range from the
56          * D-cache without flushing the cache.
57          */
58         void (*dcache_clean_area)(void *addr, int size);
59
60         /*
61          * Set the page table
62          */
63         void (*switch_mm)(unsigned long pgd_phys, struct mm_struct *mm);
64         /*
65          * Set a possibly extended PTE.  Non-extended PTEs should
66          * ignore 'ext'.
67          */
68         void (*set_pte_ext)(pte_t *ptep, pte_t pte, unsigned int ext);
69
70         /* Suspend/resume */
71         unsigned int suspend_size;
72         void (*do_suspend)(void *);
73         void (*do_resume)(void *);
74 } processor;
75
76 #ifndef MULTI_CPU
77 extern void cpu_proc_init(void);
78 extern void cpu_proc_fin(void);
79 extern int cpu_do_idle(void);
80 extern void cpu_dcache_clean_area(void *, int);
81 extern void cpu_do_switch_mm(unsigned long pgd_phys, struct mm_struct *mm);
82 extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
83 extern void cpu_reset(unsigned long addr) __attribute__((noreturn));
84 #else
85 #define cpu_proc_init                   processor._proc_init
86 #define cpu_proc_fin                    processor._proc_fin
87 #define cpu_reset                       processor.reset
88 #define cpu_do_idle                     processor._do_idle
89 #define cpu_dcache_clean_area           processor.dcache_clean_area
90 #define cpu_set_pte_ext                 processor.set_pte_ext
91 #define cpu_do_switch_mm                processor.switch_mm
92 #endif
93
94 extern void cpu_resume(void);
95
96 #include <asm/memory.h>
97
98 #ifdef CONFIG_MMU
99
100 #define cpu_switch_mm(pgd,mm) cpu_do_switch_mm(virt_to_phys(pgd),mm)
101
102 #define cpu_get_pgd()   \
103         ({                                              \
104                 unsigned long pg;                       \
105                 __asm__("mrc    p15, 0, %0, c2, c0, 0"  \
106                          : "=r" (pg) : : "cc");         \
107                 pg &= ~0x3fff;                          \
108                 (pgd_t *)phys_to_virt(pg);              \
109         })
110
111 #endif
112
113 #endif /* __ASSEMBLY__ */
114 #endif /* __KERNEL__ */
115 #endif /* __ASM_PROCFNS_H */