Linux kernel mirror (for testing)
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linux
1#ifndef _H8300_BITOPS_H
2#define _H8300_BITOPS_H
3
4/*
5 * Copyright 1992, Linus Torvalds.
6 * Copyright 2002, Yoshinori Sato
7 */
8
9#include <linux/compiler.h>
10
11#ifdef __KERNEL__
12
13#ifndef _LINUX_BITOPS_H
14#error only <linux/bitops.h> can be included directly
15#endif
16
17/*
18 * Function prototypes to keep gcc -Wall happy
19 */
20
21/*
22 * ffz = Find First Zero in word. Undefined if no zero exists,
23 * so code should check against ~0UL first..
24 */
25static __inline__ unsigned long ffz(unsigned long word)
26{
27 unsigned long result;
28
29 result = -1;
30 __asm__("1:\n\t"
31 "shlr.l %2\n\t"
32 "adds #1,%0\n\t"
33 "bcs 1b"
34 : "=r" (result)
35 : "0" (result),"r" (word));
36 return result;
37}
38
39#define H8300_GEN_BITOP_CONST(OP,BIT) \
40 case BIT: \
41 __asm__(OP " #" #BIT ",@%0"::"r"(b_addr):"memory"); \
42 break;
43
44#define H8300_GEN_BITOP(FNAME,OP) \
45static __inline__ void FNAME(int nr, volatile unsigned long* addr) \
46{ \
47 volatile unsigned char *b_addr; \
48 b_addr = (volatile unsigned char *)addr + ((nr >> 3) ^ 3); \
49 if (__builtin_constant_p(nr)) { \
50 switch(nr & 7) { \
51 H8300_GEN_BITOP_CONST(OP,0) \
52 H8300_GEN_BITOP_CONST(OP,1) \
53 H8300_GEN_BITOP_CONST(OP,2) \
54 H8300_GEN_BITOP_CONST(OP,3) \
55 H8300_GEN_BITOP_CONST(OP,4) \
56 H8300_GEN_BITOP_CONST(OP,5) \
57 H8300_GEN_BITOP_CONST(OP,6) \
58 H8300_GEN_BITOP_CONST(OP,7) \
59 } \
60 } else { \
61 __asm__(OP " %w0,@%1"::"r"(nr),"r"(b_addr):"memory"); \
62 } \
63}
64
65/*
66 * clear_bit() doesn't provide any barrier for the compiler.
67 */
68#define smp_mb__before_clear_bit() barrier()
69#define smp_mb__after_clear_bit() barrier()
70
71H8300_GEN_BITOP(set_bit ,"bset")
72H8300_GEN_BITOP(clear_bit ,"bclr")
73H8300_GEN_BITOP(change_bit,"bnot")
74#define __set_bit(nr,addr) set_bit((nr),(addr))
75#define __clear_bit(nr,addr) clear_bit((nr),(addr))
76#define __change_bit(nr,addr) change_bit((nr),(addr))
77
78#undef H8300_GEN_BITOP
79#undef H8300_GEN_BITOP_CONST
80
81static __inline__ int test_bit(int nr, const unsigned long* addr)
82{
83 return (*((volatile unsigned char *)addr +
84 ((nr >> 3) ^ 3)) & (1UL << (nr & 7))) != 0;
85}
86
87#define __test_bit(nr, addr) test_bit(nr, addr)
88
89#define H8300_GEN_TEST_BITOP_CONST_INT(OP,BIT) \
90 case BIT: \
91 __asm__("stc ccr,%w1\n\t" \
92 "orc #0x80,ccr\n\t" \
93 "bld #" #BIT ",@%4\n\t" \
94 OP " #" #BIT ",@%4\n\t" \
95 "rotxl.l %0\n\t" \
96 "ldc %w1,ccr" \
97 : "=r"(retval),"=&r"(ccrsave),"=m"(*b_addr) \
98 : "0" (retval),"r" (b_addr) \
99 : "memory"); \
100 break;
101
102#define H8300_GEN_TEST_BITOP_CONST(OP,BIT) \
103 case BIT: \
104 __asm__("bld #" #BIT ",@%3\n\t" \
105 OP " #" #BIT ",@%3\n\t" \
106 "rotxl.l %0\n\t" \
107 : "=r"(retval),"=m"(*b_addr) \
108 : "0" (retval),"r" (b_addr) \
109 : "memory"); \
110 break;
111
112#define H8300_GEN_TEST_BITOP(FNNAME,OP) \
113static __inline__ int FNNAME(int nr, volatile void * addr) \
114{ \
115 int retval = 0; \
116 char ccrsave; \
117 volatile unsigned char *b_addr; \
118 b_addr = (volatile unsigned char *)addr + ((nr >> 3) ^ 3); \
119 if (__builtin_constant_p(nr)) { \
120 switch(nr & 7) { \
121 H8300_GEN_TEST_BITOP_CONST_INT(OP,0) \
122 H8300_GEN_TEST_BITOP_CONST_INT(OP,1) \
123 H8300_GEN_TEST_BITOP_CONST_INT(OP,2) \
124 H8300_GEN_TEST_BITOP_CONST_INT(OP,3) \
125 H8300_GEN_TEST_BITOP_CONST_INT(OP,4) \
126 H8300_GEN_TEST_BITOP_CONST_INT(OP,5) \
127 H8300_GEN_TEST_BITOP_CONST_INT(OP,6) \
128 H8300_GEN_TEST_BITOP_CONST_INT(OP,7) \
129 } \
130 } else { \
131 __asm__("stc ccr,%w1\n\t" \
132 "orc #0x80,ccr\n\t" \
133 "btst %w5,@%4\n\t" \
134 OP " %w5,@%4\n\t" \
135 "beq 1f\n\t" \
136 "inc.l #1,%0\n" \
137 "1:\n\t" \
138 "ldc %w1,ccr" \
139 : "=r"(retval),"=&r"(ccrsave),"=m"(*b_addr) \
140 : "0" (retval),"r" (b_addr),"r"(nr) \
141 : "memory"); \
142 } \
143 return retval; \
144} \
145 \
146static __inline__ int __ ## FNNAME(int nr, volatile void * addr) \
147{ \
148 int retval = 0; \
149 volatile unsigned char *b_addr; \
150 b_addr = (volatile unsigned char *)addr + ((nr >> 3) ^ 3); \
151 if (__builtin_constant_p(nr)) { \
152 switch(nr & 7) { \
153 H8300_GEN_TEST_BITOP_CONST(OP,0) \
154 H8300_GEN_TEST_BITOP_CONST(OP,1) \
155 H8300_GEN_TEST_BITOP_CONST(OP,2) \
156 H8300_GEN_TEST_BITOP_CONST(OP,3) \
157 H8300_GEN_TEST_BITOP_CONST(OP,4) \
158 H8300_GEN_TEST_BITOP_CONST(OP,5) \
159 H8300_GEN_TEST_BITOP_CONST(OP,6) \
160 H8300_GEN_TEST_BITOP_CONST(OP,7) \
161 } \
162 } else { \
163 __asm__("btst %w4,@%3\n\t" \
164 OP " %w4,@%3\n\t" \
165 "beq 1f\n\t" \
166 "inc.l #1,%0\n" \
167 "1:" \
168 : "=r"(retval),"=m"(*b_addr) \
169 : "0" (retval),"r" (b_addr),"r"(nr) \
170 : "memory"); \
171 } \
172 return retval; \
173}
174
175H8300_GEN_TEST_BITOP(test_and_set_bit, "bset")
176H8300_GEN_TEST_BITOP(test_and_clear_bit, "bclr")
177H8300_GEN_TEST_BITOP(test_and_change_bit,"bnot")
178#undef H8300_GEN_TEST_BITOP_CONST
179#undef H8300_GEN_TEST_BITOP_CONST_INT
180#undef H8300_GEN_TEST_BITOP
181
182#include <asm-generic/bitops/ffs.h>
183
184static __inline__ unsigned long __ffs(unsigned long word)
185{
186 unsigned long result;
187
188 result = -1;
189 __asm__("1:\n\t"
190 "shlr.l %2\n\t"
191 "adds #1,%0\n\t"
192 "bcc 1b"
193 : "=r" (result)
194 : "0"(result),"r"(word));
195 return result;
196}
197
198#include <asm-generic/bitops/find.h>
199#include <asm-generic/bitops/sched.h>
200#include <asm-generic/bitops/hweight.h>
201#include <asm-generic/bitops/lock.h>
202#include <asm-generic/bitops/le.h>
203#include <asm-generic/bitops/ext2-atomic.h>
204
205#endif /* __KERNEL__ */
206
207#include <asm-generic/bitops/fls.h>
208#include <asm-generic/bitops/__fls.h>
209#include <asm-generic/bitops/fls64.h>
210
211#endif /* _H8300_BITOPS_H */