Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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#include <asm-generic/bitops/fls.h>
13#include <asm-generic/bitops/__fls.h>
14#include <asm-generic/bitops/fls64.h>
15
16#ifdef __KERNEL__
17
18#ifndef _LINUX_BITOPS_H
19#error only <linux/bitops.h> can be included directly
20#endif
21
22/*
23 * Function prototypes to keep gcc -Wall happy
24 */
25
26/*
27 * ffz = Find First Zero in word. Undefined if no zero exists,
28 * so code should check against ~0UL first..
29 */
30static inline unsigned long ffz(unsigned long word)
31{
32 unsigned long result;
33
34 result = -1;
35 __asm__("1:\n\t"
36 "shlr.l %1\n\t"
37 "adds #1,%0\n\t"
38 "bcs 1b"
39 : "=r"(result),"=r"(word)
40 : "0"(result), "1"(word));
41 return result;
42}
43
44#define H8300_GEN_BITOP(FNAME, OP) \
45static inline void FNAME(int nr, volatile unsigned long *addr) \
46{ \
47 unsigned char *b_addr; \
48 unsigned char bit = nr & 7; \
49 \
50 b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3); \
51 if (__builtin_constant_p(nr)) { \
52 __asm__(OP " %1,%0" : "+WU"(*b_addr) : "i"(nr & 7)); \
53 } else { \
54 __asm__(OP " %s1,%0" : "+WU"(*b_addr) : "r"(bit)); \
55 } \
56}
57
58H8300_GEN_BITOP(set_bit, "bset")
59H8300_GEN_BITOP(clear_bit, "bclr")
60H8300_GEN_BITOP(change_bit, "bnot")
61#define __set_bit(nr, addr) set_bit((nr), (addr))
62#define __clear_bit(nr, addr) clear_bit((nr), (addr))
63#define __change_bit(nr, addr) change_bit((nr), (addr))
64
65#undef H8300_GEN_BITOP
66
67static inline int test_bit(int nr, const volatile unsigned long *addr)
68{
69 int ret = 0;
70 unsigned char *b_addr;
71 unsigned char bit = nr & 7;
72
73 b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3);
74 if (__builtin_constant_p(nr)) {
75 __asm__("bld %Z2,%1\n\t"
76 "rotxl %0\n\t"
77 : "=r"(ret)
78 : "WU"(*b_addr), "i"(nr & 7), "0"(ret) : "cc");
79 } else {
80 __asm__("btst %w2,%1\n\t"
81 "beq 1f\n\t"
82 "inc.l #1,%0\n"
83 "1:"
84 : "=r"(ret)
85 : "WU"(*b_addr), "r"(bit), "0"(ret) : "cc");
86 }
87 return ret;
88}
89
90#define __test_bit(nr, addr) test_bit(nr, addr)
91
92#define H8300_GEN_TEST_BITOP(FNNAME, OP) \
93static inline int FNNAME(int nr, void *addr) \
94{ \
95 int retval = 0; \
96 char ccrsave; \
97 unsigned char *b_addr; \
98 unsigned char bit = nr & 7; \
99 \
100 b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3); \
101 if (__builtin_constant_p(nr)) { \
102 __asm__("stc ccr,%s2\n\t" \
103 "orc #0x80,ccr\n\t" \
104 "bld %4,%1\n\t" \
105 OP " %4,%1\n\t" \
106 "rotxl.l %0\n\t" \
107 "ldc %s2,ccr" \
108 : "=r"(retval), "+WU" (*b_addr), "=&r"(ccrsave) \
109 : "0"(retval), "i"(nr & 7) : "cc"); \
110 } else { \
111 __asm__("stc ccr,%t3\n\t" \
112 "orc #0x80,ccr\n\t" \
113 "btst %s3,%1\n\t" \
114 OP " %s3,%1\n\t" \
115 "beq 1f\n\t" \
116 "inc.l #1,%0\n\t" \
117 "1:\n" \
118 "ldc %t3,ccr" \
119 : "=r"(retval), "+WU" (*b_addr) \
120 : "0" (retval), "r"(bit) : "cc"); \
121 } \
122 return retval; \
123} \
124 \
125static inline int __ ## FNNAME(int nr, void *addr) \
126{ \
127 int retval = 0; \
128 unsigned char *b_addr; \
129 unsigned char bit = nr & 7; \
130 \
131 b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3); \
132 if (__builtin_constant_p(nr)) { \
133 __asm__("bld %3,%1\n\t" \
134 OP " %3,%1\n\t" \
135 "rotxl.l %0\n\t" \
136 : "=r"(retval), "+WU"(*b_addr) \
137 : "0" (retval), "i"(nr & 7)); \
138 } else { \
139 __asm__("btst %s3,%1\n\t" \
140 OP " %s3,%1\n\t" \
141 "beq 1f\n\t" \
142 "inc.l #1,%0\n\t" \
143 "1:" \
144 : "=r"(retval), "+WU"(*b_addr) \
145 : "0" (retval), "r"(bit)); \
146 } \
147 return retval; \
148}
149
150H8300_GEN_TEST_BITOP(test_and_set_bit, "bset")
151H8300_GEN_TEST_BITOP(test_and_clear_bit, "bclr")
152H8300_GEN_TEST_BITOP(test_and_change_bit, "bnot")
153#undef H8300_GEN_TEST_BITOP
154
155#include <asm-generic/bitops/ffs.h>
156
157static inline unsigned long __ffs(unsigned long word)
158{
159 unsigned long result;
160
161 result = -1;
162 __asm__("1:\n\t"
163 "shlr.l %1\n\t"
164 "adds #1,%0\n\t"
165 "bcc 1b"
166 : "=r" (result),"=r"(word)
167 : "0"(result), "1"(word));
168 return result;
169}
170
171#include <asm-generic/bitops/find.h>
172#include <asm-generic/bitops/sched.h>
173#include <asm-generic/bitops/hweight.h>
174#include <asm-generic/bitops/lock.h>
175#include <asm-generic/bitops/le.h>
176#include <asm-generic/bitops/ext2-atomic.h>
177
178#endif /* __KERNEL__ */
179
180#endif /* _H8300_BITOPS_H */