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 H8300_GEN_BITOP(set_bit, "bset")
55 H8300_GEN_BITOP(clear_bit, "bclr")
56 H8300_GEN_BITOP(change_bit, "bnot")
57 #define __set_bit(nr, addr) set_bit((nr), (addr))
58 #define __clear_bit(nr, addr) clear_bit((nr), (addr))
59 #define __change_bit(nr, addr) change_bit((nr), (addr))
60
61 #undef H8300_GEN_BITOP
62
test_bit(int nr,const volatile unsigned long * addr)63 static inline int test_bit(int nr, const volatile unsigned long *addr)
64 {
65 int ret = 0;
66 unsigned char *b_addr;
67 unsigned char bit = nr & 7;
68
69 b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3);
70 if (__builtin_constant_p(nr)) {
71 __asm__("bld %Z2,%1\n\t"
72 "rotxl %0\n\t"
73 : "=r"(ret)
74 : "WU"(*b_addr), "i"(nr & 7), "0"(ret) : "cc");
75 } else {
76 __asm__("btst %w2,%1\n\t"
77 "beq 1f\n\t"
78 "inc.l #1,%0\n"
79 "1:"
80 : "=r"(ret)
81 : "WU"(*b_addr), "r"(bit), "0"(ret) : "cc");
82 }
83 return ret;
84 }
85
86 #define __test_bit(nr, addr) test_bit(nr, addr)
87
88 #define H8300_GEN_TEST_BITOP(FNNAME, OP) \
89 static inline int FNNAME(int nr, void *addr) \
90 { \
91 int retval = 0; \
92 char ccrsave; \
93 unsigned char *b_addr; \
94 unsigned char bit = nr & 7; \
95 \
96 b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3); \
97 if (__builtin_constant_p(nr)) { \
98 __asm__("stc ccr,%s2\n\t" \
99 "orc #0x80,ccr\n\t" \
100 "bld %4,%1\n\t" \
101 OP " %4,%1\n\t" \
102 "rotxl.l %0\n\t" \
103 "ldc %s2,ccr" \
104 : "=r"(retval), "+WU" (*b_addr), "=&r"(ccrsave) \
105 : "0"(retval), "i"(nr & 7) : "cc"); \
106 } else { \
107 __asm__("stc ccr,%t3\n\t" \
108 "orc #0x80,ccr\n\t" \
109 "btst %s3,%1\n\t" \
110 OP " %s3,%1\n\t" \
111 "beq 1f\n\t" \
112 "inc.l #1,%0\n\t" \
113 "1:\n" \
114 "ldc %t3,ccr" \
115 : "=r"(retval), "+WU" (*b_addr) \
116 : "0" (retval), "r"(bit) : "cc"); \
117 } \
118 return retval; \
119 } \
120 \
121 static inline int __ ## FNNAME(int nr, void *addr) \
122 { \
123 int retval = 0; \
124 unsigned char *b_addr; \
125 unsigned char bit = nr & 7; \
126 \
127 b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3); \
128 if (__builtin_constant_p(nr)) { \
129 __asm__("bld %3,%1\n\t" \
130 OP " %3,%1\n\t" \
131 "rotxl.l %0\n\t" \
132 : "=r"(retval), "+WU"(*b_addr) \
133 : "0" (retval), "i"(nr & 7)); \
134 } else { \
135 __asm__("btst %s3,%1\n\t" \
136 OP " %s3,%1\n\t" \
137 "beq 1f\n\t" \
138 "inc.l #1,%0\n\t" \
139 "1:" \
140 : "=r"(retval), "+WU"(*b_addr) \
141 : "0" (retval), "r"(bit)); \
142 } \
143 return retval; \
144 }
145
146 H8300_GEN_TEST_BITOP(test_and_set_bit, "bset")
147 H8300_GEN_TEST_BITOP(test_and_clear_bit, "bclr")
148 H8300_GEN_TEST_BITOP(test_and_change_bit, "bnot")
149 #undef H8300_GEN_TEST_BITOP
150
151 #include <asm-generic/bitops/ffs.h>
152
__ffs(unsigned long word)153 static inline unsigned long __ffs(unsigned long word)
154 {
155 unsigned long result;
156
157 result = -1;
158 __asm__("1:\n\t"
159 "shlr.l %1\n\t"
160 "adds #1,%0\n\t"
161 "bcc 1b"
162 : "=r" (result),"=r"(word)
163 : "0"(result), "1"(word));
164 return result;
165 }
166
167 #include <asm-generic/bitops/find.h>
168 #include <asm-generic/bitops/sched.h>
169 #include <asm-generic/bitops/hweight.h>
170 #include <asm-generic/bitops/lock.h>
171 #include <asm-generic/bitops/le.h>
172 #include <asm-generic/bitops/ext2-atomic.h>
173
174 #endif /* __KERNEL__ */
175
176 #include <asm-generic/bitops/fls.h>
177 #include <asm-generic/bitops/__fls.h>
178 #include <asm-generic/bitops/fls64.h>
179
180 #endif /* _H8300_BITOPS_H */
181