diff options
Diffstat (limited to 'sys/ia64/include/atomic.h')
| -rw-r--r-- | sys/ia64/include/atomic.h | 417 |
1 files changed, 0 insertions, 417 deletions
diff --git a/sys/ia64/include/atomic.h b/sys/ia64/include/atomic.h deleted file mode 100644 index e8ac7a7..0000000 --- a/sys/ia64/include/atomic.h +++ /dev/null @@ -1,417 +0,0 @@ -/*- - * Copyright (c) 1998 Doug Rabson - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * $FreeBSD$ - */ - -#ifndef _MACHINE_ATOMIC_H_ -#define _MACHINE_ATOMIC_H_ - -#define mb() __asm __volatile("mf") -#define wmb() mb() -#define rmb() mb() - -/* - * Various simple arithmetic on memory which is atomic in the presence - * of interrupts and SMP safe. - */ - -/* - * Everything is built out of cmpxchg. - */ -#define IA64_CMPXCHG(sz, sem, p, cmpval, newval, ret) \ - __asm __volatile ( \ - "mov ar.ccv=%2;;\n\t" \ - "cmpxchg" #sz "." #sem " %0=%4,%3,ar.ccv\n\t" \ - : "=r" (ret), "=m" (*p) \ - : "r" ((uint64_t)cmpval), "r" (newval), "m" (*p) \ - : "memory") - -/* - * Some common forms of cmpxch. - */ -static __inline uint32_t -ia64_cmpxchg_acq_32(volatile uint32_t* p, uint32_t cmpval, uint32_t newval) -{ - uint32_t ret; - IA64_CMPXCHG(4, acq, p, cmpval, newval, ret); - return (ret); -} - -static __inline uint32_t -ia64_cmpxchg_rel_32(volatile uint32_t* p, uint32_t cmpval, uint32_t newval) -{ - uint32_t ret; - IA64_CMPXCHG(4, rel, p, cmpval, newval, ret); - return (ret); -} - -static __inline uint64_t -ia64_cmpxchg_acq_64(volatile uint64_t* p, uint64_t cmpval, uint64_t newval) -{ - uint64_t ret; - IA64_CMPXCHG(8, acq, p, cmpval, newval, ret); - return (ret); -} - -static __inline uint64_t -ia64_cmpxchg_rel_64(volatile uint64_t* p, uint64_t cmpval, uint64_t newval) -{ - uint64_t ret; - IA64_CMPXCHG(8, rel, p, cmpval, newval, ret); - return (ret); -} - -#define ATOMIC_STORE_LOAD(type, width, size) \ - static __inline uint##width##_t \ - ia64_ld_acq_##width(volatile uint##width##_t* p) \ - { \ - uint##width##_t v; \ - __asm __volatile ("ld" size ".acq %0=%1" : "=r" (v) \ - : "m" (*p) : "memory"); \ - return (v); \ - } \ - \ - static __inline uint##width##_t \ - atomic_load_acq_##width(volatile uint##width##_t* p) \ - { \ - uint##width##_t v; \ - __asm __volatile ("ld" size ".acq %0=%1" : "=r" (v) \ - : "m" (*p) : "memory"); \ - return (v); \ - } \ - \ - static __inline uint##width##_t \ - atomic_load_acq_##type(volatile uint##width##_t* p) \ - { \ - uint##width##_t v; \ - __asm __volatile ("ld" size ".acq %0=%1" : "=r" (v) \ - : "m" (*p) : "memory"); \ - return (v); \ - } \ - \ - static __inline void \ - ia64_st_rel_##width(volatile uint##width##_t* p, uint##width##_t v) \ - { \ - __asm __volatile ("st" size ".rel %0=%1" : "=m" (*p) \ - : "r" (v) : "memory"); \ - } \ - \ - static __inline void \ - atomic_store_rel_##width(volatile uint##width##_t* p, \ - uint##width##_t v) \ - { \ - __asm __volatile ("st" size ".rel %0=%1" : "=m" (*p) \ - : "r" (v) : "memory"); \ - } \ - \ - static __inline void \ - atomic_store_rel_##type(volatile uint##width##_t* p, \ - uint##width##_t v) \ - { \ - __asm __volatile ("st" size ".rel %0=%1" : "=m" (*p) \ - : "r" (v) : "memory"); \ - } - -ATOMIC_STORE_LOAD(char, 8, "1") -ATOMIC_STORE_LOAD(short, 16, "2") -ATOMIC_STORE_LOAD(int, 32, "4") -ATOMIC_STORE_LOAD(long, 64, "8") - -#undef ATOMIC_STORE_LOAD - -#define atomic_load_acq_ptr(p) \ - ((void *)atomic_load_acq_64((volatile uint64_t *)p)) - -#define atomic_store_rel_ptr(p, v) \ - atomic_store_rel_64((volatile uint64_t *)p, (uint64_t)v) - -#define IA64_ATOMIC(sz, type, name, width, op) \ - static __inline type \ - atomic_##name##_acq_##width(volatile type *p, type v) \ - { \ - type old, ret; \ - do { \ - old = *p; \ - IA64_CMPXCHG(sz, acq, p, old, old op v, ret); \ - } while (ret != old); \ - return (old); \ - } \ - \ - static __inline type \ - atomic_##name##_rel_##width(volatile type *p, type v) \ - { \ - type old, ret; \ - do { \ - old = *p; \ - IA64_CMPXCHG(sz, rel, p, old, old op v, ret); \ - } while (ret != old); \ - return (old); \ - } - -IA64_ATOMIC(1, uint8_t, set, 8, |) -IA64_ATOMIC(2, uint16_t, set, 16, |) -IA64_ATOMIC(4, uint32_t, set, 32, |) -IA64_ATOMIC(8, uint64_t, set, 64, |) - -IA64_ATOMIC(1, uint8_t, clear, 8, &~) -IA64_ATOMIC(2, uint16_t, clear, 16, &~) -IA64_ATOMIC(4, uint32_t, clear, 32, &~) -IA64_ATOMIC(8, uint64_t, clear, 64, &~) - -IA64_ATOMIC(1, uint8_t, add, 8, +) -IA64_ATOMIC(2, uint16_t, add, 16, +) -IA64_ATOMIC(4, uint32_t, add, 32, +) -IA64_ATOMIC(8, uint64_t, add, 64, +) - -IA64_ATOMIC(1, uint8_t, subtract, 8, -) -IA64_ATOMIC(2, uint16_t, subtract, 16, -) -IA64_ATOMIC(4, uint32_t, subtract, 32, -) -IA64_ATOMIC(8, uint64_t, subtract, 64, -) - -#undef IA64_ATOMIC - -#define atomic_set_8 atomic_set_acq_8 -#define atomic_clear_8 atomic_clear_acq_8 -#define atomic_add_8 atomic_add_acq_8 -#define atomic_subtract_8 atomic_subtract_acq_8 - -#define atomic_set_16 atomic_set_acq_16 -#define atomic_clear_16 atomic_clear_acq_16 -#define atomic_add_16 atomic_add_acq_16 -#define atomic_subtract_16 atomic_subtract_acq_16 - -#define atomic_set_32 atomic_set_acq_32 -#define atomic_clear_32 atomic_clear_acq_32 -#define atomic_add_32 atomic_add_acq_32 -#define atomic_subtract_32 atomic_subtract_acq_32 - -#define atomic_set_64 atomic_set_acq_64 -#define atomic_clear_64 atomic_clear_acq_64 -#define atomic_add_64 atomic_add_acq_64 -#define atomic_subtract_64 atomic_subtract_acq_64 - -#define atomic_set_char atomic_set_8 -#define atomic_clear_char atomic_clear_8 -#define atomic_add_char atomic_add_8 -#define atomic_subtract_char atomic_subtract_8 -#define atomic_set_acq_char atomic_set_acq_8 -#define atomic_clear_acq_char atomic_clear_acq_8 -#define atomic_add_acq_char atomic_add_acq_8 -#define atomic_subtract_acq_char atomic_subtract_acq_8 -#define atomic_set_rel_char atomic_set_rel_8 -#define atomic_clear_rel_char atomic_clear_rel_8 -#define atomic_add_rel_char atomic_add_rel_8 -#define atomic_subtract_rel_char atomic_subtract_rel_8 - -#define atomic_set_short atomic_set_16 -#define atomic_clear_short atomic_clear_16 -#define atomic_add_short atomic_add_16 -#define atomic_subtract_short atomic_subtract_16 -#define atomic_set_acq_short atomic_set_acq_16 -#define atomic_clear_acq_short atomic_clear_acq_16 -#define atomic_add_acq_short atomic_add_acq_16 -#define atomic_subtract_acq_short atomic_subtract_acq_16 -#define atomic_set_rel_short atomic_set_rel_16 -#define atomic_clear_rel_short atomic_clear_rel_16 -#define atomic_add_rel_short atomic_add_rel_16 -#define atomic_subtract_rel_short atomic_subtract_rel_16 - -#define atomic_set_int atomic_set_32 -#define atomic_clear_int atomic_clear_32 -#define atomic_add_int atomic_add_32 -#define atomic_subtract_int atomic_subtract_32 -#define atomic_set_acq_int atomic_set_acq_32 -#define atomic_clear_acq_int atomic_clear_acq_32 -#define atomic_add_acq_int atomic_add_acq_32 -#define atomic_subtract_acq_int atomic_subtract_acq_32 -#define atomic_set_rel_int atomic_set_rel_32 -#define atomic_clear_rel_int atomic_clear_rel_32 -#define atomic_add_rel_int atomic_add_rel_32 -#define atomic_subtract_rel_int atomic_subtract_rel_32 - -#define atomic_set_long atomic_set_64 -#define atomic_clear_long atomic_clear_64 -#define atomic_add_long atomic_add_64 -#define atomic_subtract_long atomic_subtract_64 -#define atomic_set_acq_long atomic_set_acq_64 -#define atomic_clear_acq_long atomic_clear_acq_64 -#define atomic_add_acq_long atomic_add_acq_64 -#define atomic_subtract_acq_long atomic_subtract_acq_64 -#define atomic_set_rel_long atomic_set_rel_64 -#define atomic_clear_rel_long atomic_clear_rel_64 -#define atomic_add_rel_long atomic_add_rel_64 -#define atomic_subtract_rel_long atomic_subtract_rel_64 - -/* XXX Needs casting. */ -#define atomic_set_ptr atomic_set_64 -#define atomic_clear_ptr atomic_clear_64 -#define atomic_add_ptr atomic_add_64 -#define atomic_subtract_ptr atomic_subtract_64 -#define atomic_set_acq_ptr atomic_set_acq_64 -#define atomic_clear_acq_ptr atomic_clear_acq_64 -#define atomic_add_acq_ptr atomic_add_acq_64 -#define atomic_subtract_acq_ptr atomic_subtract_acq_64 -#define atomic_set_rel_ptr atomic_set_rel_64 -#define atomic_clear_rel_ptr atomic_clear_rel_64 -#define atomic_add_rel_ptr atomic_add_rel_64 -#define atomic_subtract_rel_ptr atomic_subtract_rel_64 - -#undef IA64_CMPXCHG - -/* - * Atomically compare the value stored at *p with cmpval and if the - * two values are equal, update the value of *p with newval. Returns - * zero if the compare failed, nonzero otherwise. - */ -static __inline int -atomic_cmpset_acq_32(volatile uint32_t* p, uint32_t cmpval, uint32_t newval) -{ - return (ia64_cmpxchg_acq_32(p, cmpval, newval) == cmpval); -} - -static __inline int -atomic_cmpset_rel_32(volatile uint32_t* p, uint32_t cmpval, uint32_t newval) -{ - return (ia64_cmpxchg_rel_32(p, cmpval, newval) == cmpval); -} - -/* - * Atomically compare the value stored at *p with cmpval and if the - * two values are equal, update the value of *p with newval. Returns - * zero if the compare failed, nonzero otherwise. - */ -static __inline int -atomic_cmpset_acq_64(volatile uint64_t* p, uint64_t cmpval, uint64_t newval) -{ - return (ia64_cmpxchg_acq_64(p, cmpval, newval) == cmpval); -} - -static __inline int -atomic_cmpset_rel_64(volatile uint64_t* p, uint64_t cmpval, uint64_t newval) -{ - return (ia64_cmpxchg_rel_64(p, cmpval, newval) == cmpval); -} - -#define atomic_cmpset_32 atomic_cmpset_acq_32 -#define atomic_cmpset_64 atomic_cmpset_acq_64 -#define atomic_cmpset_int atomic_cmpset_32 -#define atomic_cmpset_long atomic_cmpset_64 -#define atomic_cmpset_acq_int atomic_cmpset_acq_32 -#define atomic_cmpset_rel_int atomic_cmpset_rel_32 -#define atomic_cmpset_acq_long atomic_cmpset_acq_64 -#define atomic_cmpset_rel_long atomic_cmpset_rel_64 - -#define atomic_cmpset_acq_ptr(p, o, n) \ - (atomic_cmpset_acq_64((volatile uint64_t *)p, (uint64_t)o, (uint64_t)n)) - -#define atomic_cmpset_ptr atomic_cmpset_acq_ptr - -#define atomic_cmpset_rel_ptr(p, o, n) \ - (atomic_cmpset_rel_64((volatile uint64_t *)p, (uint64_t)o, (uint64_t)n)) - -static __inline uint32_t -atomic_readandclear_32(volatile uint32_t* p) -{ - uint32_t val; - do { - val = *p; - } while (!atomic_cmpset_32(p, val, 0)); - return (val); -} - -static __inline uint64_t -atomic_readandclear_64(volatile uint64_t* p) -{ - uint64_t val; - do { - val = *p; - } while (!atomic_cmpset_64(p, val, 0)); - return (val); -} - -#define atomic_readandclear_int atomic_readandclear_32 -#define atomic_readandclear_long atomic_readandclear_64 -#define atomic_readandclear_ptr atomic_readandclear_64 - -/* - * Atomically add the value of v to the integer pointed to by p and return - * the previous value of *p. - * - * XXX: Should we use the fetchadd instruction here? - */ -static __inline uint32_t -atomic_fetchadd_32(volatile uint32_t *p, uint32_t v) -{ - uint32_t value; - - do { - value = *p; - } while (!atomic_cmpset_32(p, value, value + v)); - return (value); -} - -#define atomic_fetchadd_int atomic_fetchadd_32 - -static __inline u_long -atomic_fetchadd_long(volatile u_long *p, u_long v) -{ - u_long value; - - do { - value = *p; - } while (!atomic_cmpset_64(p, value, value + v)); - return (value); -} - -/* - * <type> atomic_swap_<type>(volatile <type> *p, <type> v); - */ - -static __inline uint32_t -atomic_swap_32(volatile uint32_t *p, uint32_t v) -{ - uint32_t r; - - __asm __volatile ("xchg4 %0 = %3, %2;;" : "=r"(r), "=m"(*p) : - "r"(v), "m"(*p) : "memory"); - return (r); -} - -static __inline uint64_t -atomic_swap_64(volatile uint64_t *p, uint64_t v) -{ - uint64_t r; - - __asm __volatile ("xchg8 %0 = %3, %2;;" : "=r"(r), "=m"(*p) : - "r"(v), "m"(*p) : "memory"); - return (r); -} - -#define atomic_swap_int atomic_swap_32 -#define atomic_swap_long atomic_swap_64 -#define atomic_swap_ptr atomic_swap_64 - -#endif /* ! _MACHINE_ATOMIC_H_ */ |
