From e130b681c43ee2215512ffcf6cadcbc4487e96e6 Mon Sep 17 00:00:00 2001 From: Carmelo Amoroso Date: Fri, 16 Nov 2007 14:26:46 +0000 Subject: Added AVR32 support to uClibc. Signed-off-by: Hans-Christian Egtvedt --- libc/sysdeps/linux/avr32/bits/atomic.h | 120 +++++++++++++++++++++++++++++++++ 1 file changed, 120 insertions(+) create mode 100644 libc/sysdeps/linux/avr32/bits/atomic.h (limited to 'libc/sysdeps/linux/avr32/bits/atomic.h') diff --git a/libc/sysdeps/linux/avr32/bits/atomic.h b/libc/sysdeps/linux/avr32/bits/atomic.h new file mode 100644 index 000000000..4f870c023 --- /dev/null +++ b/libc/sysdeps/linux/avr32/bits/atomic.h @@ -0,0 +1,120 @@ +/* + * Copyright (C) 2007 Atmel Corporation + * + * This file is subject to the terms and conditions of the GNU Lesser General + * Public License. See the file "COPYING.LIB" in the main directory of this + * archive for more details. + */ +#ifndef _AVR32_BITS_ATOMIC_H +#define _AVR32_BITS_ATOMIC_H 1 + +#include + +typedef int32_t atomic32_t; +typedef uint32_t uatomic32_t; +typedef int_fast32_t atomic_fast32_t; +typedef uint_fast32_t uatomic_fast32_t; + +typedef intptr_t atomicptr_t; +typedef uintptr_t uatomicptr_t; +typedef intmax_t atomic_max_t; +typedef uintmax_t uatomic_max_t; + +#define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \ + (abort(), 0) + +#define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \ + (abort(), 0) + +#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \ + ({ \ + __typeof__(*(mem)) __prev; \ + __asm__ __volatile__( \ + "/* __arch_compare_and_exchange_val_32_acq */\n" \ + "1: ssrf 5\n" \ + " ld.w %[result], %[m]\n" \ + " cp.w %[result], %[old]\n" \ + " brne 2f\n" \ + " stcond %[m], %[new]\n" \ + " brne 1b\n" \ + "2:" \ + : [result] "=&r"(__result), [m] "=m"(*(mem)) \ + : "m"(*(mem)), [old] "ir"(oldval), \ + [new] "r"(newval) \ + : "memory", "cc"); \ + __prev; \ + }) + +#define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \ + (abort(), 0) + +#define __arch_exchange_32_acq(mem, newval) \ + ({ \ + __typeof__(*(mem)) __oldval; \ + __asm__ __volatile__( \ + "/*__arch_exchange_32_acq */\n" \ + " xchg %[old], %[m], %[new]" \ + : [old] "=&r"(__oldval) \ + : [m] "r"(mem), [new] "r"(newval) \ + : "memory"); \ + __oldval; \ + }) + +#define __arch_atomic_exchange_and_add_32(mem, value) \ + ({ \ + __typeof__(*(mem)) __oldval, __tmp; \ + __asm__ __volatile__( \ + "/* __arch_atomic_exchange_and_add_32 */\n" \ + "1: ssrf 5\n" \ + " ld.w %[old], %[m]\n" \ + " add %[tmp], %[old], %[val]\n" \ + " stcond %[m], %[tmp]\n" \ + " brne 1b" \ + : [old] "=&r"(__oldval), [tmp] "=&r"(__tmp), \ + [m] "=m"(*(mem)) \ + : "m"(*(mem)), [val] "r"(value) \ + : "memory", "cc"); \ + __oldval; \ + }) + +#define __arch_atomic_decrement_if_positive_32(mem) \ + ({ \ + __typeof__(*(mem)) __oldval, __tmp; \ + __asm__ __volatile__( \ + "/* __arch_atomic_decrement_if_positive_32 */\n" \ + "1: ssrf 5\n" \ + " ld.w %[old], %[m]\n" \ + " sub %[tmp], %[old], 1\n" \ + " brlt 2f\n" \ + " stcond %[m], %[tmp]\n" \ + " brne 1b" \ + "2:" \ + : [old] "=&r"(__oldval), [tmp] "=&r"(__tmp), \ + [m] "=m"(*(mem)) \ + : "m"(*(mem)) \ + : "memory", "cc"); \ + __oldval; \ + }) + +#define atomic_exchange_acq(mem, newval) \ + ({ \ + if (sizeof(*(mem)) != 4) \ + abort(); \ + __arch_exchange_32_acq(mem, newval); \ + }) + +#define atomic_exchange_and_add(mem, newval) \ + ({ \ + if (sizeof(*(mem)) != 4) \ + abort(); \ + __arch_atomic_exchange_and_add_32(mem, newval); \ + }) + +#define atomic_decrement_if_positive(mem) \ + ({ \ + if (sizeof(*(mem)) != 4) \ + abort(); \ + __arch_atomic_decrement_if_positive_32(mem); \ + }) + +#endif /* _AVR32_BITS_ATOMIC_H */ -- cgit v1.2.3