projects/linux·blob v5.13 · refs

260 lines · 6.1 KiB

1#!/bin/sh
2# SPDX-License-Identifier: GPL-2.0
3
4ATOMICDIR=$(dirname $0)
5ARCH=$2
6
7. ${ATOMICDIR}/atomic-tbl.sh
8
9#gen_template_fallback(template, meta, pfx, name, sfx, order, arch, atomic, int, args...)
10gen_template_fallback()
11{
12 local template="$1"; shift
13 local meta="$1"; shift
14 local pfx="$1"; shift
15 local name="$1"; shift
16 local sfx="$1"; shift
17 local order="$1"; shift
18 local arch="$1"; shift
19 local atomic="$1"; shift
20 local int="$1"; shift
21
22 local atomicname="${arch}${atomic}_${pfx}${name}${sfx}${order}"
23
24 local ret="$(gen_ret_type "${meta}" "${int}")"
25 local retstmt="$(gen_ret_stmt "${meta}")"
26 local params="$(gen_params "${int}" "${atomic}" "$@")"
27 local args="$(gen_args "$@")"
28
29 if [ ! -z "${template}" ]; then
30 printf "#ifndef ${atomicname}\n"
31 . ${template}
32 printf "#define ${atomicname} ${atomicname}\n"
33 printf "#endif\n\n"
34 fi
35}
36
37#gen_proto_fallback(meta, pfx, name, sfx, order, arch, atomic, int, args...)
38gen_proto_fallback()
39{
40 local meta="$1"; shift
41 local pfx="$1"; shift
42 local name="$1"; shift
43 local sfx="$1"; shift
44 local order="$1"; shift
45
46 local tmpl="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")"
47 gen_template_fallback "${tmpl}" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "$@"
48}
49
50#gen_basic_fallbacks(basename)
51gen_basic_fallbacks()
52{
53 local basename="$1"; shift
54cat << EOF
55#define ${basename}_acquire ${basename}
56#define ${basename}_release ${basename}
57#define ${basename}_relaxed ${basename}
58EOF
59}
60
61gen_proto_order_variant()
62{
63 local meta="$1"; shift
64 local pfx="$1"; shift
65 local name="$1"; shift
66 local sfx="$1"; shift
67 local order="$1"; shift
68 local arch="$1"
69 local atomic="$2"
70
71 local basename="${arch}${atomic}_${pfx}${name}${sfx}"
72
73 printf "#define arch_${basename}${order} ${basename}${order}\n"
74}
75
76#gen_proto_order_variants(meta, pfx, name, sfx, arch, atomic, int, args...)
77gen_proto_order_variants()
78{
79 local meta="$1"; shift
80 local pfx="$1"; shift
81 local name="$1"; shift
82 local sfx="$1"; shift
83 local arch="$1"
84 local atomic="$2"
85
86 local basename="${arch}${atomic}_${pfx}${name}${sfx}"
87
88 local template="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")"
89
90 if [ -z "$arch" ]; then
91 gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"
92
93 if meta_has_acquire "${meta}"; then
94 gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
95 fi
96 if meta_has_release "${meta}"; then
97 gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
98 fi
99 if meta_has_relaxed "${meta}"; then
100 gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_relaxed" "$@"
101 fi
102
103 echo ""
104 fi
105
106 # If we don't have relaxed atomics, then we don't bother with ordering fallbacks
107 # read_acquire and set_release need to be templated, though
108 if ! meta_has_relaxed "${meta}"; then
109 gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"
110
111 if meta_has_acquire "${meta}"; then
112 gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
113 fi
114
115 if meta_has_release "${meta}"; then
116 gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
117 fi
118
119 return
120 fi
121
122 printf "#ifndef ${basename}_relaxed\n"
123
124 if [ ! -z "${template}" ]; then
125 printf "#ifdef ${basename}\n"
126 fi
127
128 gen_basic_fallbacks "${basename}"
129
130 if [ ! -z "${template}" ]; then
131 printf "#endif /* ${arch}${atomic}_${pfx}${name}${sfx} */\n\n"
132 gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"
133 gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
134 gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
135 gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_relaxed" "$@"
136 fi
137
138 printf "#else /* ${basename}_relaxed */\n\n"
139
140 gen_template_fallback "${ATOMICDIR}/fallbacks/acquire" "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
141 gen_template_fallback "${ATOMICDIR}/fallbacks/release" "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
142 gen_template_fallback "${ATOMICDIR}/fallbacks/fence" "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"
143
144 printf "#endif /* ${basename}_relaxed */\n\n"
145}
146
147gen_order_fallbacks()
148{
149 local xchg="$1"; shift
150
151cat <<EOF
152
153#ifndef ${xchg}_acquire
154#define ${xchg}_acquire(...) \\
155 __atomic_op_acquire(${xchg}, __VA_ARGS__)
156#endif
157
158#ifndef ${xchg}_release
159#define ${xchg}_release(...) \\
160 __atomic_op_release(${xchg}, __VA_ARGS__)
161#endif
162
163#ifndef ${xchg}
164#define ${xchg}(...) \\
165 __atomic_op_fence(${xchg}, __VA_ARGS__)
166#endif
167
168EOF
169}
170
171gen_xchg_fallbacks()
172{
173 local xchg="$1"; shift
174 printf "#ifndef ${xchg}_relaxed\n"
175
176 gen_basic_fallbacks ${xchg}
177
178 printf "#else /* ${xchg}_relaxed */\n"
179
180 gen_order_fallbacks ${xchg}
181
182 printf "#endif /* ${xchg}_relaxed */\n\n"
183}
184
185gen_try_cmpxchg_fallback()
186{
187 local order="$1"; shift;
188
189cat <<EOF
190#ifndef ${ARCH}try_cmpxchg${order}
191#define ${ARCH}try_cmpxchg${order}(_ptr, _oldp, _new) \\
192({ \\
193 typeof(*(_ptr)) *___op = (_oldp), ___o = *___op, ___r; \\
194 ___r = ${ARCH}cmpxchg${order}((_ptr), ___o, (_new)); \\
195 if (unlikely(___r != ___o)) \\
196 *___op = ___r; \\
197 likely(___r == ___o); \\
198})
199#endif /* ${ARCH}try_cmpxchg${order} */
200
201EOF
202}
203
204gen_try_cmpxchg_fallbacks()
205{
206 printf "#ifndef ${ARCH}try_cmpxchg_relaxed\n"
207 printf "#ifdef ${ARCH}try_cmpxchg\n"
208
209 gen_basic_fallbacks "${ARCH}try_cmpxchg"
210
211 printf "#endif /* ${ARCH}try_cmpxchg */\n\n"
212
213 for order in "" "_acquire" "_release" "_relaxed"; do
214 gen_try_cmpxchg_fallback "${order}"
215 done
216
217 printf "#else /* ${ARCH}try_cmpxchg_relaxed */\n"
218
219 gen_order_fallbacks "${ARCH}try_cmpxchg"
220
221 printf "#endif /* ${ARCH}try_cmpxchg_relaxed */\n\n"
222}
223
224cat << EOF
225// SPDX-License-Identifier: GPL-2.0
226
227// Generated by $0
228// DO NOT MODIFY THIS FILE DIRECTLY
229
230#ifndef _LINUX_ATOMIC_FALLBACK_H
231#define _LINUX_ATOMIC_FALLBACK_H
232
233#include <linux/compiler.h>
234
235EOF
236
237for xchg in "${ARCH}xchg" "${ARCH}cmpxchg" "${ARCH}cmpxchg64"; do
238 gen_xchg_fallbacks "${xchg}"
239done
240
241gen_try_cmpxchg_fallbacks
242
243grep '^[a-z]' "$1" | while read name meta args; do
244 gen_proto "${meta}" "${name}" "${ARCH}" "atomic" "int" ${args}
245done
246
247cat <<EOF
248#ifdef CONFIG_GENERIC_ATOMIC64
249#include <asm-generic/atomic64.h>
250#endif
251
252EOF
253
254grep '^[a-z]' "$1" | while read name meta args; do
255 gen_proto "${meta}" "${name}" "${ARCH}" "atomic64" "s64" ${args}
256done
257
258cat <<EOF
259#endif /* _LINUX_ATOMIC_FALLBACK_H */
260EOF