summaryrefslogtreecommitdiff
path: root/scripts/atomic/gen-atomic-fallback.sh
blob: 0fd1cf0c2b94b63536d72ad562ba2d890f30c6c0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0

ATOMICDIR=$(dirname $0)
ARCH=$2

. ${ATOMICDIR}/atomic-tbl.sh

#gen_template_fallback(template, meta, pfx, name, sfx, order, arch, atomic, int, args...)
gen_template_fallback()
{
	local template="$1"; shift
	local meta="$1"; shift
	local pfx="$1"; shift
	local name="$1"; shift
	local sfx="$1"; shift
	local order="$1"; shift
	local arch="$1"; shift
	local atomic="$1"; shift
	local int="$1"; shift

	local atomicname="${arch}${atomic}_${pfx}${name}${sfx}${order}"

	local ret="$(gen_ret_type "${meta}" "${int}")"
	local retstmt="$(gen_ret_stmt "${meta}")"
	local params="$(gen_params "${int}" "${atomic}" "$@")"
	local args="$(gen_args "$@")"

	if [ ! -z "${template}" ]; then
		printf "#ifndef ${atomicname}\n"
		. ${template}
		printf "#define ${atomicname} ${atomicname}\n"
		printf "#endif\n\n"
	fi
}

#gen_proto_fallback(meta, pfx, name, sfx, order, arch, atomic, int, args...)
gen_proto_fallback()
{
	local meta="$1"; shift
	local pfx="$1"; shift
	local name="$1"; shift
	local sfx="$1"; shift
	local order="$1"; shift

	local tmpl="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")"
	gen_template_fallback "${tmpl}" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "$@"
}

#gen_basic_fallbacks(basename)
gen_basic_fallbacks()
{
	local basename="$1"; shift
cat << EOF
#define ${basename}_acquire ${basename}
#define ${basename}_release ${basename}
#define ${basename}_relaxed ${basename}
EOF
}

#gen_proto_order_variants(meta, pfx, name, sfx, arch, atomic, int, args...)
gen_proto_order_variants()
{
	local meta="$1"; shift
	local pfx="$1"; shift
	local name="$1"; shift
	local sfx="$1"; shift
	local arch="$1"
	local atomic="$2"

	local basename="${arch}${atomic}_${pfx}${name}${sfx}"

	local template="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")"

	# If we don't have relaxed atomics, then we don't bother with ordering fallbacks
	# read_acquire and set_release need to be templated, though
	if ! meta_has_relaxed "${meta}"; then
		gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"

		if meta_has_acquire "${meta}"; then
			gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
		fi

		if meta_has_release "${meta}"; then
			gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
		fi

		return
	fi

	printf "#ifndef ${basename}_relaxed\n"

	if [ ! -z "${template}" ]; then
		printf "#ifdef ${basename}\n"
	fi

	gen_basic_fallbacks "${basename}"

	if [ ! -z "${template}" ]; then
		printf "#endif /* ${arch}${atomic}_${pfx}${name}${sfx} */\n\n"
		gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"
		gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
		gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
		gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_relaxed" "$@"
	fi

	printf "#else /* ${basename}_relaxed */\n\n"

	gen_template_fallback "${ATOMICDIR}/fallbacks/acquire"  "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
	gen_template_fallback "${ATOMICDIR}/fallbacks/release"  "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
	gen_template_fallback "${ATOMICDIR}/fallbacks/fence"  "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"

	printf "#endif /* ${basename}_relaxed */\n\n"
}

gen_xchg_fallbacks()
{
	local xchg="$1"; shift
cat <<EOF
#ifndef ${xchg}_relaxed
#define ${xchg}_relaxed		${xchg}
#define ${xchg}_acquire		${xchg}
#define ${xchg}_release		${xchg}
#else /* ${xchg}_relaxed */

#ifndef ${xchg}_acquire
#define ${xchg}_acquire(...) \\
	__atomic_op_acquire(${xchg}, __VA_ARGS__)
#endif

#ifndef ${xchg}_release
#define ${xchg}_release(...) \\
	__atomic_op_release(${xchg}, __VA_ARGS__)
#endif

#ifndef ${xchg}
#define ${xchg}(...) \\
	__atomic_op_fence(${xchg}, __VA_ARGS__)
#endif

#endif /* ${xchg}_relaxed */

EOF
}

cat << EOF
// SPDX-License-Identifier: GPL-2.0

// Generated by $0
// DO NOT MODIFY THIS FILE DIRECTLY

#ifndef _LINUX_ATOMIC_FALLBACK_H
#define _LINUX_ATOMIC_FALLBACK_H

#include <linux/compiler.h>

EOF

for xchg in "${ARCH}xchg" "${ARCH}cmpxchg" "${ARCH}cmpxchg64"; do
	gen_xchg_fallbacks "${xchg}"
done

grep '^[a-z]' "$1" | while read name meta args; do
	gen_proto "${meta}" "${name}" "${ARCH}" "atomic" "int" ${args}
done

cat <<EOF
#ifdef CONFIG_GENERIC_ATOMIC64
#include <asm-generic/atomic64.h>
#endif

EOF

grep '^[a-z]' "$1" | while read name meta args; do
	gen_proto "${meta}" "${name}" "${ARCH}" "atomic64" "s64" ${args}
done

cat <<EOF
#endif /* _LINUX_ATOMIC_FALLBACK_H */
EOF