1 /*
2 * linux/include/asm-arm/proc-armo/system.h
3 *
4 * Copyright (C) 1995, 1996 Russell King
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10 #ifndef __ASM_PROC_SYSTEM_H
11 #define __ASM_PROC_SYSTEM_H
12
13 #include <asm/proc-fns.h>
14
15 #define vectors_base() (0)
16
__xchg(unsigned long x,volatile void * ptr,int size)17 static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size)
18 {
19 extern void __bad_xchg(volatile void *, int);
20
21 switch (size) {
22 case 1: return cpu_xchg_1(x, ptr);
23 case 4: return cpu_xchg_4(x, ptr);
24 default: __bad_xchg(ptr, size);
25 }
26 return 0;
27 }
28
29 /*
30 * We need to turn the caches off before calling the reset vector - RiscOS
31 * messes up if we don't
32 */
33 #define proc_hard_reset() cpu_proc_fin()
34
35 /*
36 * A couple of speedups for the ARM
37 */
38
39 /*
40 * Save the current interrupt enable state & disable IRQs
41 */
42 #define local_save_flags_cli(x) \
43 do { \
44 unsigned long temp; \
45 __asm__ __volatile__( \
46 " mov %0, pc @ save_flags_cli\n" \
47 " orr %1, %0, #0x08000000\n" \
48 " and %0, %0, #0x0c000000\n" \
49 " teqp %1, #0\n" \
50 : "=r" (x), "=r" (temp) \
51 : \
52 : "memory"); \
53 } while (0)
54
55 /*
56 * Enable IRQs
57 */
58 #define local_irq_enable() \
59 do { \
60 unsigned long temp; \
61 __asm__ __volatile__( \
62 " mov %0, pc @ sti\n" \
63 " bic %0, %0, #0x08000000\n" \
64 " teqp %0, #0\n" \
65 : "=r" (temp) \
66 : \
67 : "memory"); \
68 } while(0)
69
70 /*
71 * Disable IRQs
72 */
73 #define local_irq_disable() \
74 do { \
75 unsigned long temp; \
76 __asm__ __volatile__( \
77 " mov %0, pc @ cli\n" \
78 " orr %0, %0, #0x08000000\n" \
79 " teqp %0, #0\n" \
80 : "=r" (temp) \
81 : \
82 : "memory"); \
83 } while(0)
84
85 #define __clf() do { \
86 unsigned long temp; \
87 __asm__ __volatile__( \
88 " mov %0, pc @ clf\n" \
89 " orr %0, %0, #0x04000000\n" \
90 " teqp %0, #0\n" \
91 : "=r" (temp)); \
92 } while(0)
93
94 #define __stf() do { \
95 unsigned long temp; \
96 __asm__ __volatile__( \
97 " mov %0, pc @ stf\n" \
98 " bic %0, %0, #0x04000000\n" \
99 " teqp %0, #0\n" \
100 : "=r" (temp)); \
101 } while(0)
102
103 /*
104 * save current IRQ & FIQ state
105 */
106 #define local_save_flags(x) \
107 do { \
108 __asm__ __volatile__( \
109 " mov %0, pc @ save_flags\n" \
110 " and %0, %0, #0x0c000000\n" \
111 : "=r" (x)); \
112 } while (0)
113
114 /*
115 * restore saved IRQ & FIQ state
116 */
117 #define local_irq_restore(x) \
118 do { \
119 unsigned long temp; \
120 __asm__ __volatile__( \
121 " mov %0, pc @ restore_flags\n" \
122 " bic %0, %0, #0x0c000000\n" \
123 " orr %0, %0, %1\n" \
124 " teqp %0, #0\n" \
125 : "=&r" (temp) \
126 : "r" (x) \
127 : "memory"); \
128 } while (0)
129
130 #define __save_and_sti(x) ({__save_flags(x);__sti();})
131
132 #endif
133