1#!/bin/sh
  2# SPDX-License-Identifier: GPL-2.0
  3
  4ATOMICDIR=$(dirname $0)
  5
  6. ${ATOMICDIR}/atomic-tbl.sh
  7
  8#gen_template_fallback(template, meta, pfx, name, sfx, order, atomic, int, args...)
  9gen_template_fallback()
 10{
 11	local template="$1"; shift
 12	local meta="$1"; shift
 13	local pfx="$1"; shift
 14	local name="$1"; shift
 15	local sfx="$1"; shift
 16	local order="$1"; shift
 17	local atomic="$1"; shift
 18	local int="$1"; shift
 19
 20	local atomicname="${atomic}_${pfx}${name}${sfx}${order}"
 21
 22	local ret="$(gen_ret_type "${meta}" "${int}")"
 23	local retstmt="$(gen_ret_stmt "${meta}")"
 24	local params="$(gen_params "${int}" "${atomic}" "$@")"
 25	local args="$(gen_args "$@")"
 26
 27	if [ ! -z "${template}" ]; then
 28		printf "#ifndef ${atomicname}\n"
 29		. ${template}
 30		printf "#define ${atomicname} ${atomicname}\n"
 31		printf "#endif\n\n"
 32	fi
 33}
 34
 35#gen_proto_fallback(meta, pfx, name, sfx, order, atomic, int, args...)
 36gen_proto_fallback()
 37{
 38	local meta="$1"; shift
 39	local pfx="$1"; shift
 40	local name="$1"; shift
 41	local sfx="$1"; shift
 42	local order="$1"; shift
 43
 44	local tmpl="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")"
 45	gen_template_fallback "${tmpl}" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "$@"
 46}
 47
 48#gen_basic_fallbacks(basename)
 49gen_basic_fallbacks()
 50{
 51	local basename="$1"; shift
 52cat << EOF
 53#define ${basename}_acquire ${basename}
 54#define ${basename}_release ${basename}
 55#define ${basename}_relaxed ${basename}
 56EOF
 57}
 58
 59#gen_proto_order_variants(meta, pfx, name, sfx, atomic, int, args...)
 60gen_proto_order_variants()
 61{
 62	local meta="$1"; shift
 63	local pfx="$1"; shift
 64	local name="$1"; shift
 65	local sfx="$1"; shift
 66	local atomic="$1"
 67
 68	local basename="${atomic}_${pfx}${name}${sfx}"
 69
 70	local template="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")"
 71
 72	# If we don't have relaxed atomics, then we don't bother with ordering fallbacks
 73	# read_acquire and set_release need to be templated, though
 74	if ! meta_has_relaxed "${meta}"; then
 75		gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"
 76
 77		if meta_has_acquire "${meta}"; then
 78			gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
 79		fi
 80
 81		if meta_has_release "${meta}"; then
 82			gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
 83		fi
 84
 85		return
 86	fi
 87
 88	printf "#ifndef ${basename}_relaxed\n"
 89
 90	if [ ! -z "${template}" ]; then
 91		printf "#ifdef ${basename}\n"
 92	fi
 93
 94	gen_basic_fallbacks "${basename}"
 95
 96	if [ ! -z "${template}" ]; then
 97		printf "#endif /* ${atomic}_${pfx}${name}${sfx} */\n\n"
 98		gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"
 99		gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
100		gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
101		gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_relaxed" "$@"
102	fi
103
104	printf "#else /* ${basename}_relaxed */\n\n"
105
106	gen_template_fallback "${ATOMICDIR}/fallbacks/acquire"  "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
107	gen_template_fallback "${ATOMICDIR}/fallbacks/release"  "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
108	gen_template_fallback "${ATOMICDIR}/fallbacks/fence"  "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"
109
110	printf "#endif /* ${basename}_relaxed */\n\n"
111}
112
113gen_xchg_fallbacks()
114{
115	local xchg="$1"; shift
116cat <<EOF
117#ifndef ${xchg}_relaxed
118#define ${xchg}_relaxed		${xchg}
119#define ${xchg}_acquire		${xchg}
120#define ${xchg}_release		${xchg}
121#else /* ${xchg}_relaxed */
122
123#ifndef ${xchg}_acquire
124#define ${xchg}_acquire(...) \\
125	__atomic_op_acquire(${xchg}, __VA_ARGS__)
126#endif
127
128#ifndef ${xchg}_release
129#define ${xchg}_release(...) \\
130	__atomic_op_release(${xchg}, __VA_ARGS__)
131#endif
132
133#ifndef ${xchg}
134#define ${xchg}(...) \\
135	__atomic_op_fence(${xchg}, __VA_ARGS__)
136#endif
137
138#endif /* ${xchg}_relaxed */
139
140EOF
141}
142
143cat << EOF
144// SPDX-License-Identifier: GPL-2.0
145
146// Generated by $0
147// DO NOT MODIFY THIS FILE DIRECTLY
148
149#ifndef _LINUX_ATOMIC_FALLBACK_H
150#define _LINUX_ATOMIC_FALLBACK_H
151
152EOF
153
154for xchg in "xchg" "cmpxchg" "cmpxchg64"; do
155	gen_xchg_fallbacks "${xchg}"
156done
157
158grep '^[a-z]' "$1" | while read name meta args; do
159	gen_proto "${meta}" "${name}" "atomic" "int" ${args}
160done
161
162cat <<EOF
163#define atomic_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c))
164#define atomic_cond_read_relaxed(v, c) smp_cond_load_relaxed(&(v)->counter, (c))
165
166#ifdef CONFIG_GENERIC_ATOMIC64
167#include <asm-generic/atomic64.h>
168#endif
169
170EOF
171
172grep '^[a-z]' "$1" | while read name meta args; do
173	gen_proto "${meta}" "${name}" "atomic64" "s64" ${args}
174done
175
176cat <<EOF
177#define atomic64_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c))
178#define atomic64_cond_read_relaxed(v, c) smp_cond_load_relaxed(&(v)->counter, (c))
179
180#endif /* _LINUX_ATOMIC_FALLBACK_H */
181EOF