?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / include / asm-h8300 / bitops.h
blobcb18e3b0aa948520b8f7321e6ead3d00eb1d5cf2
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 #include <asm/system.h>
11
12 #ifdef __KERNEL__
13
14 #ifndef _LINUX_BITOPS_H
15 #error only <linux/bitops.h> can be included directly
16 #endif
17
18 /*
19 * Function prototypes to keep gcc -Wall happy
20 */
21
22 /*
23 * ffz = Find First Zero in word. Undefined if no zero exists,
24 * so code should check against ~0UL first..
25 */
26 static __inline__ unsigned long ffz(unsigned long word)
27 {
28 unsigned long result;
29
30 result = -1;
31 __asm__("1:\n\t"
32 "shlr.l %2\n\t"
33 "adds #1,%0\n\t"
34 "bcs 1b"
35 : "=r" (result)
36 : "0" (result),"r" (word));
37 return result;
38 }
39
40 #define H8300_GEN_BITOP_CONST(OP,BIT) \
41 case BIT: \
42 __asm__(OP " #" #BIT ",@%0"::"r"(b_addr):"memory"); \
43 break;
44
45 #define H8300_GEN_BITOP(FNAME,OP) \
46 static __inline__ void FNAME(int nr, volatile unsigned long* addr) \
47 { \
48 volatile unsigned char *b_addr; \
49 b_addr = (volatile unsigned char *)addr + ((nr >> 3) ^ 3); \
50 if (__builtin_constant_p(nr)) { \
51 switch(nr & 7) { \
52 H8300_GEN_BITOP_CONST(OP,0) \
53 H8300_GEN_BITOP_CONST(OP,1) \
54 H8300_GEN_BITOP_CONST(OP,2) \
55 H8300_GEN_BITOP_CONST(OP,3) \
56 H8300_GEN_BITOP_CONST(OP,4) \
57 H8300_GEN_BITOP_CONST(OP,5) \
58 H8300_GEN_BITOP_CONST(OP,6) \
59 H8300_GEN_BITOP_CONST(OP,7) \
60 } \
61 } else { \
62 __asm__(OP " %w0,@%1"::"r"(nr),"r"(b_addr):"memory"); \
63 } \
64 }
65
66 /*
67 * clear_bit() doesn't provide any barrier for the compiler.
68 */
69 #define smp_mb__before_clear_bit() barrier()
70 #define smp_mb__after_clear_bit() barrier()
71
72 H8300_GEN_BITOP(set_bit ,"bset")
73 H8300_GEN_BITOP(clear_bit ,"bclr")
74 H8300_GEN_BITOP(change_bit,"bnot")
75 #define __set_bit(nr,addr) set_bit((nr),(addr))
76 #define __clear_bit(nr,addr) clear_bit((nr),(addr))
77 #define __change_bit(nr,addr) change_bit((nr),(addr))
78
79 #undef H8300_GEN_BITOP
80 #undef H8300_GEN_BITOP_CONST
81
82 static __inline__ int test_bit(int nr, const unsigned long* addr)
83 {
84 return (*((volatile unsigned char *)addr +
85 ((nr >> 3) ^ 3)) & (1UL << (nr & 7))) != 0;
86 }
87
88 #define __test_bit(nr, addr) test_bit(nr, addr)
89
90 #define H8300_GEN_TEST_BITOP_CONST_INT(OP,BIT) \
91 case BIT: \
92 __asm__("stc ccr,%w1\n\t" \
93 "orc #0x80,ccr\n\t" \
94 "bld #" #BIT ",@%4\n\t" \
95 OP " #" #BIT ",@%4\n\t" \
96 "rotxl.l %0\n\t" \
97 "ldc %w1,ccr" \
98 : "=r"(retval),"=&r"(ccrsave),"=m"(*b_addr) \
99 : "0" (retval),"r" (b_addr) \
100 : "memory"); \
101 break;
102
103 #define H8300_GEN_TEST_BITOP_CONST(OP,BIT) \
104 case BIT: \
105 __asm__("bld #" #BIT ",@%3\n\t" \
106 OP " #" #BIT ",@%3\n\t" \
107 "rotxl.l %0\n\t" \
108 : "=r"(retval),"=m"(*b_addr) \
109 : "0" (retval),"r" (b_addr) \
110 : "memory"); \
111 break;
112
113 #define H8300_GEN_TEST_BITOP(FNNAME,OP) \
114 static __inline__ int FNNAME(int nr, volatile void * addr) \
115 { \
116 int retval = 0; \
117 char ccrsave; \
118 volatile unsigned char *b_addr; \
119 b_addr = (volatile unsigned char *)addr + ((nr >> 3) ^ 3); \
120 if (__builtin_constant_p(nr)) { \
121 switch(nr & 7) { \
122 H8300_GEN_TEST_BITOP_CONST_INT(OP,0) \
123 H8300_GEN_TEST_BITOP_CONST_INT(OP,1) \
124 H8300_GEN_TEST_BITOP_CONST_INT(OP,2) \
125 H8300_GEN_TEST_BITOP_CONST_INT(OP,3) \
126 H8300_GEN_TEST_BITOP_CONST_INT(OP,4) \
127 H8300_GEN_TEST_BITOP_CONST_INT(OP,5) \
128 H8300_GEN_TEST_BITOP_CONST_INT(OP,6) \
129 H8300_GEN_TEST_BITOP_CONST_INT(OP,7) \
130 } \
131 } else { \
132 __asm__("stc ccr,%w1\n\t" \
133 "orc #0x80,ccr\n\t" \
134 "btst %w5,@%4\n\t" \
135 OP " %w5,@%4\n\t" \
136 "beq 1f\n\t" \
137 "inc.l #1,%0\n" \
138 "1:\n\t" \
139 "ldc %w1,ccr" \
140 : "=r"(retval),"=&r"(ccrsave),"=m"(*b_addr) \
141 : "0" (retval),"r" (b_addr),"r"(nr) \
142 : "memory"); \
143 } \
144 return retval; \
145 } \
146 \
147 static __inline__ int __ ## FNNAME(int nr, volatile void * addr) \
148 { \
149 int retval = 0; \
150 volatile unsigned char *b_addr; \
151 b_addr = (volatile unsigned char *)addr + ((nr >> 3) ^ 3); \
152 if (__builtin_constant_p(nr)) { \
153 switch(nr & 7) { \
154 H8300_GEN_TEST_BITOP_CONST(OP,0) \
155 H8300_GEN_TEST_BITOP_CONST(OP,1) \
156 H8300_GEN_TEST_BITOP_CONST(OP,2) \
157 H8300_GEN_TEST_BITOP_CONST(OP,3) \
158 H8300_GEN_TEST_BITOP_CONST(OP,4) \
159 H8300_GEN_TEST_BITOP_CONST(OP,5) \
160 H8300_GEN_TEST_BITOP_CONST(OP,6) \
161 H8300_GEN_TEST_BITOP_CONST(OP,7) \
162 } \
163 } else { \
164 __asm__("btst %w4,@%3\n\t" \
165 OP " %w4,@%3\n\t" \
166 "beq 1f\n\t" \
167 "inc.l #1,%0\n" \
168 "1:" \
169 : "=r"(retval),"=m"(*b_addr) \
170 : "0" (retval),"r" (b_addr),"r"(nr) \
171 : "memory"); \
172 } \
173 return retval; \
174 }
175
176 H8300_GEN_TEST_BITOP(test_and_set_bit, "bset")
177 H8300_GEN_TEST_BITOP(test_and_clear_bit, "bclr")
178 H8300_GEN_TEST_BITOP(test_and_change_bit,"bnot")
179 #undef H8300_GEN_TEST_BITOP_CONST
180 #undef H8300_GEN_TEST_BITOP_CONST_INT
181 #undef H8300_GEN_TEST_BITOP
182
183 #include <asm-generic/bitops/ffs.h>
184
185 static __inline__ unsigned long __ffs(unsigned long word)
186 {
187 unsigned long result;
188
189 result = -1;
190 __asm__("1:\n\t"
191 "shlr.l %2\n\t"
192 "adds #1,%0\n\t"
193 "bcc 1b"
194 : "=r" (result)
195 : "0"(result),"r"(word));
196 return result;
197 }
198
199 #include <asm-generic/bitops/find.h>
200 #include <asm-generic/bitops/sched.h>
201 #include <asm-generic/bitops/hweight.h>
202 #include <asm-generic/bitops/lock.h>
203 #include <asm-generic/bitops/ext2-non-atomic.h>
204 #include <asm-generic/bitops/ext2-atomic.h>
205 #include <asm-generic/bitops/minix.h>
206
207 #endif /* __KERNEL__ */
208
209 #include <asm-generic/bitops/fls.h>
210 #include <asm-generic/bitops/fls64.h>
211
212 #endif /* _H8300_BITOPS_H */
mah project overlay