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|
#!/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="$1"; shift
local atomicname="arch_${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_order_fallback(meta, pfx, name, sfx, order, atomic, int, args...)
gen_order_fallback()
{
local meta="$1"; shift
local pfx="$1"; shift
local name="$1"; shift
local sfx="$1"; shift
local order="$1"; shift
local tmpl_order=${order#_}
local tmpl="${ATOMICDIR}/fallbacks/${tmpl_order:-fence}"
gen_template_fallback "${tmpl}" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "$@"
}
#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="$1"
local basename="arch_${atomic}_${pfx}${name}${sfx}"
local template="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "")"
# If we don't have relaxed atomics, then we don't bother with ordering fallbacks
# read_acquire and set_release need to be templated, though
if ! meta_has_relaxed "${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 /* ${basename} */\n\n"
gen_proto_fallback "${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 /* ${basename}_relaxed */\n\n"
gen_order_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
gen_order_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
gen_order_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"
printf "#endif /* ${basename}_relaxed */\n\n"
}
gen_order_fallbacks()
{
local xchg="$1"; shift
cat <<EOF
#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
EOF
}
gen_xchg_fallbacks()
{
local xchg="$1"; shift
printf "#ifndef ${xchg}_relaxed\n"
gen_basic_fallbacks ${xchg}
printf "#else /* ${xchg}_relaxed */\n"
gen_order_fallbacks ${xchg}
printf "#endif /* ${xchg}_relaxed */\n\n"
}
gen_try_cmpxchg_fallback()
{
local cmpxchg="$1"; shift;
local order="$1"; shift;
cat <<EOF
#ifndef arch_try_${cmpxchg}${order}
#define arch_try_${cmpxchg}${order}(_ptr, _oldp, _new) \\
({ \\
typeof(*(_ptr)) *___op = (_oldp), ___o = *___op, ___r; \\
___r = arch_${cmpxchg}${order}((_ptr), ___o, (_new)); \\
if (unlikely(___r != ___o)) \\
*___op = ___r; \\
likely(___r == ___o); \\
})
#endif /* arch_try_${cmpxchg}${order} */
EOF
}
gen_try_cmpxchg_fallbacks()
{
local cmpxchg="$1"; shift;
printf "#ifndef arch_try_${cmpxchg}_relaxed\n"
printf "#ifdef arch_try_${cmpxchg}\n"
gen_basic_fallbacks "arch_try_${cmpxchg}"
printf "#endif /* arch_try_${cmpxchg} */\n\n"
for order in "" "_acquire" "_release" "_relaxed"; do
gen_try_cmpxchg_fallback "${cmpxchg}" "${order}"
done
printf "#else /* arch_try_${cmpxchg}_relaxed */\n"
gen_order_fallbacks "arch_try_${cmpxchg}"
printf "#endif /* arch_try_${cmpxchg}_relaxed */\n\n"
}
cat << EOF
// SPDX-License-Identifier: GPL-2.0
// Generated by $0
// DO NOT MODIFY THIS FILE DIRECTLY
#ifndef _LINUX_ATOMIC_FALLBACK_H
#define _LINUX_ATOMIC_FALLBACK_H
#include <linux/compiler.h>
EOF
for xchg in "arch_xchg" "arch_cmpxchg" "arch_cmpxchg64" "arch_cmpxchg128"; do
gen_xchg_fallbacks "${xchg}"
done
for cmpxchg in "cmpxchg" "cmpxchg64" "cmpxchg128"; do
gen_try_cmpxchg_fallbacks "${cmpxchg}"
done
for cmpxchg in "cmpxchg_local" "cmpxchg64_local"; do
gen_try_cmpxchg_fallback "${cmpxchg}" ""
done
grep '^[a-z]' "$1" | while read name meta args; do
gen_proto "${meta}" "${name}" "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}" "atomic64" "s64" ${args}
done
cat <<EOF
#endif /* _LINUX_ATOMIC_FALLBACK_H */
EOF
|
