1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _H8300_BITOPS_H
3 #define _H8300_BITOPS_H
4
5 /*
6 * Copyright 1992, Linus Torvalds.
7 * Copyright 2002, Yoshinori Sato
8 */
9
10 #include <linux/compiler.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 */
ffz(unsigned long word)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 %1\n\t"
33 "adds #1,%0\n\t"
34 "bcs 1b"
35 : "=r"(result),"=r"(word)
36 : "0"(result), "1"(word));
37 return result;
38 }
39
40 #define H8300_GEN_BITOP(FNAME, OP) \
41 static inline void FNAME(int nr, volatile unsigned long *addr) \
42 { \
43 unsigned char *b_addr; \
44 unsigned char bit = nr & 7; \
45 \
46 b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3); \
47 if (__builtin_constant_p(nr)) { \
48 __asm__(OP " %1,%0" : "+WU"(*b_addr) : "i"(nr & 7)); \
49 } else { \
50 __asm__(OP " %s1,%0" : "+WU"(*b_addr) : "r"(bit)); \
51 } \
52 }
53
54 /*
55 * clear_bit() doesn't provide any barrier for the compiler.
56 */
57 #define smp_mb__before_clear_bit() barrier()
58 #define smp_mb__after_clear_bit() barrier()
59
60 H8300_GEN_BITOP(set_bit, "bset")
61 H8300_GEN_BITOP(clear_bit, "bclr")
62 H8300_GEN_BITOP(change_bit, "bnot")
63 #define __set_bit(nr, addr) set_bit((nr), (addr))
64 #define __clear_bit(nr, addr) clear_bit((nr), (addr))
65 #define __change_bit(nr, addr) change_bit((nr), (addr))
66
67 #undef H8300_GEN_BITOP
68
test_bit(int nr,const volatile unsigned long * addr)69 static inline int test_bit(int nr, const volatile unsigned long *addr)
70 {
71 int ret = 0;
72 unsigned char *b_addr;
73 unsigned char bit = nr & 7;
74
75 b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3);
76 if (__builtin_constant_p(nr)) {
77 __asm__("bld %Z2,%1\n\t"
78 "rotxl %0\n\t"
79 : "=r"(ret)
80 : "WU"(*b_addr), "i"(nr & 7), "0"(ret) : "cc");
81 } else {
82 __asm__("btst %w2,%1\n\t"
83 "beq 1f\n\t"
84 "inc.l #1,%0\n"
85 "1:"
86 : "=r"(ret)
87 : "WU"(*b_addr), "r"(bit), "0"(ret) : "cc");
88 }
89 return ret;
90 }
91
92 #define __test_bit(nr, addr) test_bit(nr, addr)
93
94 #define H8300_GEN_TEST_BITOP(FNNAME, OP) \
95 static inline int FNNAME(int nr, void *addr) \
96 { \
97 int retval = 0; \
98 char ccrsave; \
99 unsigned char *b_addr; \
100 unsigned char bit = nr & 7; \
101 \
102 b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3); \
103 if (__builtin_constant_p(nr)) { \
104 __asm__("stc ccr,%s2\n\t" \
105 "orc #0x80,ccr\n\t" \
106 "bld %4,%1\n\t" \
107 OP " %4,%1\n\t" \
108 "rotxl.l %0\n\t" \
109 "ldc %s2,ccr" \
110 : "=r"(retval), "+WU" (*b_addr), "=&r"(ccrsave) \
111 : "0"(retval), "i"(nr & 7) : "cc"); \
112 } else { \
113 __asm__("stc ccr,%t3\n\t" \
114 "orc #0x80,ccr\n\t" \
115 "btst %s3,%1\n\t" \
116 OP " %s3,%1\n\t" \
117 "beq 1f\n\t" \
118 "inc.l #1,%0\n\t" \
119 "1:\n" \
120 "ldc %t3,ccr" \
121 : "=r"(retval), "+WU" (*b_addr) \
122 : "0" (retval), "r"(bit) : "cc"); \
123 } \
124 return retval; \
125 } \
126 \
127 static inline int __ ## FNNAME(int nr, void *addr) \
128 { \
129 int retval = 0; \
130 unsigned char *b_addr; \
131 unsigned char bit = nr & 7; \
132 \
133 b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3); \
134 if (__builtin_constant_p(nr)) { \
135 __asm__("bld %3,%1\n\t" \
136 OP " %3,%1\n\t" \
137 "rotxl.l %0\n\t" \
138 : "=r"(retval), "+WU"(*b_addr) \
139 : "0" (retval), "i"(nr & 7)); \
140 } else { \
141 __asm__("btst %s3,%1\n\t" \
142 OP " %s3,%1\n\t" \
143 "beq 1f\n\t" \
144 "inc.l #1,%0\n\t" \
145 "1:" \
146 : "=r"(retval), "+WU"(*b_addr) \
147 : "0" (retval), "r"(bit)); \
148 } \
149 return retval; \
150 }
151
152 H8300_GEN_TEST_BITOP(test_and_set_bit, "bset")
153 H8300_GEN_TEST_BITOP(test_and_clear_bit, "bclr")
154 H8300_GEN_TEST_BITOP(test_and_change_bit, "bnot")
155 #undef H8300_GEN_TEST_BITOP
156
157 #include <asm-generic/bitops/ffs.h>
158
__ffs(unsigned long word)159 static inline unsigned long __ffs(unsigned long word)
160 {
161 unsigned long result;
162
163 result = -1;
164 __asm__("1:\n\t"
165 "shlr.l %1\n\t"
166 "adds #1,%0\n\t"
167 "bcc 1b"
168 : "=r" (result),"=r"(word)
169 : "0"(result), "1"(word));
170 return result;
171 }
172
173 #include <asm-generic/bitops/find.h>
174 #include <asm-generic/bitops/sched.h>
175 #include <asm-generic/bitops/hweight.h>
176 #include <asm-generic/bitops/lock.h>
177 #include <asm-generic/bitops/le.h>
178 #include <asm-generic/bitops/ext2-atomic.h>
179
180 #endif /* __KERNEL__ */
181
182 #include <asm-generic/bitops/fls.h>
183 #include <asm-generic/bitops/__fls.h>
184 #include <asm-generic/bitops/fls64.h>
185
186 #endif /* _H8300_BITOPS_H */
187