From 9f3653b1fa29767d03f35d3c811d21738787abe8 Mon Sep 17 00:00:00 2001 From: Stafford Horne Date: Wed, 20 Oct 2021 06:49:18 +0900 Subject: [PATCH] or1k: Atomics and Locking primitives Reviewed-by: Adhemerval Zanella --- sysdeps/or1k/atomic-machine.h | 71 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 sysdeps/or1k/atomic-machine.h diff --git a/sysdeps/or1k/atomic-machine.h b/sysdeps/or1k/atomic-machine.h new file mode 100644 index 0000000..0d27298 --- /dev/null +++ b/sysdeps/or1k/atomic-machine.h @@ -0,0 +1,71 @@ +/* Atomic operations. OpenRISC version. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + . */ + +#ifndef __OR1K_ATOMIC_H_ +#define __OR1K_ATOMIC_H_ + +#include + +#define __HAVE_64B_ATOMICS 0 +#define USE_ATOMIC_COMPILER_BUILTINS 1 +#define ATOMIC_EXCHANGE_USES_CAS 1 + +#define __arch_compare_and_exchange_bool_8_int(mem, newval, oldval, model) \ + (abort (), 0) + +#define __arch_compare_and_exchange_bool_16_int(mem, newval, oldval, model) \ + (abort (), 0) + +#define __arch_compare_and_exchange_bool_32_int(mem, newval, oldval, model) \ + ({ \ + typeof (*mem) __oldval = (oldval); \ + !__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \ + model, __ATOMIC_RELAXED); \ + }) + +#define __arch_compare_and_exchange_bool_64_int(mem, newval, oldval, model) \ + (abort (), 0) + +#define __arch_compare_and_exchange_val_8_int(mem, newval, oldval, model) \ + (abort (), (__typeof (*mem)) 0) + +#define __arch_compare_and_exchange_val_16_int(mem, newval, oldval, model) \ + (abort (), (__typeof (*mem)) 0) + +#define __arch_compare_and_exchange_val_32_int(mem, newval, oldval, model) \ + ({ \ + typeof (*mem) __oldval = (oldval); \ + __atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \ + model, __ATOMIC_RELAXED); \ + __oldval; \ + }) + +#define __arch_compare_and_exchange_val_64_int(mem, newval, oldval, model) \ + (abort (), (__typeof (*mem)) 0) + +#define atomic_compare_and_exchange_bool_acq(mem, new, old) \ + __atomic_bool_bysize (__arch_compare_and_exchange_bool, int, \ + mem, new, old, __ATOMIC_ACQUIRE) + +#define atomic_compare_and_exchange_val_acq(mem, new, old) \ + __atomic_val_bysize (__arch_compare_and_exchange_val, int, \ + mem, new, old, __ATOMIC_ACQUIRE) + +#define atomic_full_barrier() ({ asm volatile ("l.msync" ::: "memory"); }) + +#endif /* atomic-machine.h */ -- 2.7.4