[PATCH] include/asm-sh64/: "extern inline" -> "static inline"
[linux-2.6.git] / include / asm-sh64 / system.h
1 #ifndef __ASM_SH64_SYSTEM_H
2 #define __ASM_SH64_SYSTEM_H
3
4 /*
5  * This file is subject to the terms and conditions of the GNU General Public
6  * License.  See the file "COPYING" in the main directory of this archive
7  * for more details.
8  *
9  * include/asm-sh64/system.h
10  *
11  * Copyright (C) 2000, 2001  Paolo Alberelli
12  * Copyright (C) 2003  Paul Mundt
13  * Copyright (C) 2004  Richard Curnow
14  *
15  */
16
17 #include <linux/config.h>
18 #include <asm/registers.h>
19 #include <asm/processor.h>
20
21 /*
22  *      switch_to() should switch tasks to task nr n, first
23  */
24
25 typedef struct {
26         unsigned long seg;
27 } mm_segment_t;
28
29 extern struct task_struct *sh64_switch_to(struct task_struct *prev,
30                                           struct thread_struct *prev_thread,
31                                           struct task_struct *next,
32                                           struct thread_struct *next_thread);
33
34 #define switch_to(prev,next,last) \
35         do {\
36                 if (last_task_used_math != next) {\
37                         struct pt_regs *regs = next->thread.uregs;\
38                         if (regs) regs->sr |= SR_FD;\
39                 }\
40                 last = sh64_switch_to(prev, &prev->thread, next, &next->thread);\
41         } while(0)
42
43 #define nop() __asm__ __volatile__ ("nop")
44
45 #define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
46
47 #define tas(ptr) (xchg((ptr), 1))
48
49 extern void __xchg_called_with_bad_pointer(void);
50
51 #define mb()    __asm__ __volatile__ ("synco": : :"memory")
52 #define rmb()   mb()
53 #define wmb()   __asm__ __volatile__ ("synco": : :"memory")
54 #define read_barrier_depends()  do { } while (0)
55
56 #ifdef CONFIG_SMP
57 #define smp_mb()        mb()
58 #define smp_rmb()       rmb()
59 #define smp_wmb()       wmb()
60 #define smp_read_barrier_depends()      read_barrier_depends()
61 #else
62 #define smp_mb()        barrier()
63 #define smp_rmb()       barrier()
64 #define smp_wmb()       barrier()
65 #define smp_read_barrier_depends()      do { } while (0)
66 #endif /* CONFIG_SMP */
67
68 #define set_rmb(var, value) do { xchg(&var, value); } while (0)
69 #define set_mb(var, value) set_rmb(var, value)
70 #define set_wmb(var, value) do { var = value; wmb(); } while (0)
71
72 /* Interrupt Control */
73 #ifndef HARD_CLI
74 #define SR_MASK_L 0x000000f0L
75 #define SR_MASK_LL 0x00000000000000f0LL
76 #else
77 #define SR_MASK_L 0x10000000L
78 #define SR_MASK_LL 0x0000000010000000LL
79 #endif
80
81 static __inline__ void local_irq_enable(void)
82 {
83         /* cli/sti based on SR.BL */
84         unsigned long long __dummy0, __dummy1=~SR_MASK_LL;
85
86         __asm__ __volatile__("getcon    " __SR ", %0\n\t"
87                              "and       %0, %1, %0\n\t"
88                              "putcon    %0, " __SR "\n\t"
89                              : "=&r" (__dummy0)
90                              : "r" (__dummy1));
91 }
92
93 static __inline__ void local_irq_disable(void)
94 {
95         /* cli/sti based on SR.BL */
96         unsigned long long __dummy0, __dummy1=SR_MASK_LL;
97         __asm__ __volatile__("getcon    " __SR ", %0\n\t"
98                              "or        %0, %1, %0\n\t"
99                              "putcon    %0, " __SR "\n\t"
100                              : "=&r" (__dummy0)
101                              : "r" (__dummy1));
102 }
103
104 #define local_save_flags(x)                                             \
105 (__extension__ ({       unsigned long long __dummy=SR_MASK_LL;          \
106         __asm__ __volatile__(                                           \
107                 "getcon " __SR ", %0\n\t"                               \
108                 "and    %0, %1, %0"                                     \
109                 : "=&r" (x)                                             \
110                 : "r" (__dummy));}))
111
112 #define local_irq_save(x)                                               \
113 (__extension__ ({       unsigned long long __d2=SR_MASK_LL, __d1;       \
114         __asm__ __volatile__(                                           \
115                 "getcon " __SR ", %1\n\t"                               \
116                 "or     %1, r63, %0\n\t"                                \
117                 "or     %1, %2, %1\n\t"                                 \
118                 "putcon %1, " __SR "\n\t"                               \
119                 "and    %0, %2, %0"                                     \
120                 : "=&r" (x), "=&r" (__d1)                               \
121                 : "r" (__d2));}));
122
123 #define local_irq_restore(x) do {                                       \
124         if ( ((x) & SR_MASK_L) == 0 )           /* dropping to 0 ? */   \
125                 local_irq_enable();             /* yes...re-enable */   \
126 } while (0)
127
128 #define irqs_disabled()                 \
129 ({                                      \
130         unsigned long flags;            \
131         local_save_flags(flags);        \
132         (flags != 0);                   \
133 })
134
135 static inline unsigned long xchg_u32(volatile int * m, unsigned long val)
136 {
137         unsigned long flags, retval;
138
139         local_irq_save(flags);
140         retval = *m;
141         *m = val;
142         local_irq_restore(flags);
143         return retval;
144 }
145
146 static inline unsigned long xchg_u8(volatile unsigned char * m, unsigned long val)
147 {
148         unsigned long flags, retval;
149
150         local_irq_save(flags);
151         retval = *m;
152         *m = val & 0xff;
153         local_irq_restore(flags);
154         return retval;
155 }
156
157 static __inline__ unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
158 {
159         switch (size) {
160         case 4:
161                 return xchg_u32(ptr, x);
162                 break;
163         case 1:
164                 return xchg_u8(ptr, x);
165                 break;
166         }
167         __xchg_called_with_bad_pointer();
168         return x;
169 }
170
171 /* XXX
172  * disable hlt during certain critical i/o operations
173  */
174 #define HAVE_DISABLE_HLT
175 void disable_hlt(void);
176 void enable_hlt(void);
177
178
179 #define smp_mb()        barrier()
180 #define smp_rmb()       barrier()
181 #define smp_wmb()       barrier()
182
183 #ifdef CONFIG_SH_ALPHANUMERIC
184 /* This is only used for debugging. */
185 extern void print_seg(char *file,int line);
186 #define PLS() print_seg(__FILE__,__LINE__)
187 #else   /* CONFIG_SH_ALPHANUMERIC */
188 #define PLS()
189 #endif  /* CONFIG_SH_ALPHANUMERIC */
190
191 #define PL() printk("@ <%s,%s:%d>\n",__FILE__,__FUNCTION__,__LINE__)
192
193 #define arch_align_stack(x) (x)
194
195 #endif /* __ASM_SH64_SYSTEM_H */