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Diffstat (limited to 'scripts/atomic/gen-atomic-fallback.sh')
| -rw-r--r-- | scripts/atomic/gen-atomic-fallback.sh | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/scripts/atomic/gen-atomic-fallback.sh b/scripts/atomic/gen-atomic-fallback.sh new file mode 100644 index 000000000000..1bd7c1707633 --- /dev/null +++ b/scripts/atomic/gen-atomic-fallback.sh @@ -0,0 +1,181 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 + +ATOMICDIR=$(dirname $0) + +. ${ATOMICDIR}/atomic-tbl.sh + +#gen_template_fallback(template, meta, pfx, name, sfx, order, 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 atomic="$1"; shift + local int="$1"; shift + + local atomicname="${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, 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, atomic, int, args...) +gen_proto_order_variants() +{ + local meta="$1"; shift + local pfx="$1"; shift + local name="$1"; shift + local sfx="$1"; shift + local atomic="$1" + + local basename="${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 /* ${atomic}_${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 $0 +// DO NOT MODIFY THIS FILE DIRECTLY + +#ifndef _LINUX_ATOMIC_FALLBACK_H +#define _LINUX_ATOMIC_FALLBACK_H + +EOF + +for xchg in "xchg" "cmpxchg" "cmpxchg64"; do + gen_xchg_fallbacks "${xchg}" +done + +grep '^[a-z]' "$1" | while read name meta args; do + gen_proto "${meta}" "${name}" "atomic" "int" ${args} +done + +cat <<EOF +#define atomic_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c)) +#define atomic_cond_read_relaxed(v, c) smp_cond_load_relaxed(&(v)->counter, (c)) + +#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}" "atomic64" "s64" ${args} +done + +cat <<EOF +#define atomic64_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c)) +#define atomic64_cond_read_relaxed(v, c) smp_cond_load_relaxed(&(v)->counter, (c)) + +#endif /* _LINUX_ATOMIC_FALLBACK_H */ +EOF |