diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/hexagon/include/asm/atomic.h')
-rw-r--r-- | ANDROID_3.4.5/arch/hexagon/include/asm/atomic.h | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/ANDROID_3.4.5/arch/hexagon/include/asm/atomic.h b/ANDROID_3.4.5/arch/hexagon/include/asm/atomic.h deleted file mode 100644 index 3e258043..00000000 --- a/ANDROID_3.4.5/arch/hexagon/include/asm/atomic.h +++ /dev/null @@ -1,165 +0,0 @@ -/* - * Atomic operations for the Hexagon architecture - * - * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. - * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - */ - -#ifndef _ASM_ATOMIC_H -#define _ASM_ATOMIC_H - -#include <linux/types.h> -#include <asm/cmpxchg.h> - -#define ATOMIC_INIT(i) { (i) } -#define atomic_set(v, i) ((v)->counter = (i)) - -/** - * atomic_read - reads a word, atomically - * @v: pointer to atomic value - * - * Assumes all word reads on our architecture are atomic. - */ -#define atomic_read(v) ((v)->counter) - -/** - * atomic_xchg - atomic - * @v: pointer to memory to change - * @new: new value (technically passed in a register -- see xchg) - */ -#define atomic_xchg(v, new) (xchg(&((v)->counter), (new))) - - -/** - * atomic_cmpxchg - atomic compare-and-exchange values - * @v: pointer to value to change - * @old: desired old value to match - * @new: new value to put in - * - * Parameters are then pointer, value-in-register, value-in-register, - * and the output is the old value. - * - * Apparently this is complicated for archs that don't support - * the memw_locked like we do (or it's broken or whatever). - * - * Kind of the lynchpin of the rest of the generically defined routines. - * Remember V2 had that bug with dotnew predicate set by memw_locked. - * - * "old" is "expected" old val, __oldval is actual old value - */ -static inline int atomic_cmpxchg(atomic_t *v, int old, int new) -{ - int __oldval; - - asm volatile( - "1: %0 = memw_locked(%1);\n" - " { P0 = cmp.eq(%0,%2);\n" - " if (!P0.new) jump:nt 2f; }\n" - " memw_locked(%1,P0) = %3;\n" - " if (!P0) jump 1b;\n" - "2:\n" - : "=&r" (__oldval) - : "r" (&v->counter), "r" (old), "r" (new) - : "memory", "p0" - ); - - return __oldval; -} - -static inline int atomic_add_return(int i, atomic_t *v) -{ - int output; - - __asm__ __volatile__ ( - "1: %0 = memw_locked(%1);\n" - " %0 = add(%0,%2);\n" - " memw_locked(%1,P3)=%0;\n" - " if !P3 jump 1b;\n" - : "=&r" (output) - : "r" (&v->counter), "r" (i) - : "memory", "p3" - ); - return output; - -} - -#define atomic_add(i, v) atomic_add_return(i, (v)) - -static inline int atomic_sub_return(int i, atomic_t *v) -{ - int output; - __asm__ __volatile__ ( - "1: %0 = memw_locked(%1);\n" - " %0 = sub(%0,%2);\n" - " memw_locked(%1,P3)=%0\n" - " if !P3 jump 1b;\n" - : "=&r" (output) - : "r" (&v->counter), "r" (i) - : "memory", "p3" - ); - return output; -} - -#define atomic_sub(i, v) atomic_sub_return(i, (v)) - -/** - * atomic_add_unless - add unless the number is a given value - * @v: pointer to value - * @a: amount to add - * @u: unless value is equal to u - * - * Returns 1 if the add happened, 0 if it didn't. - */ -static inline int __atomic_add_unless(atomic_t *v, int a, int u) -{ - int output, __oldval; - asm volatile( - "1: %0 = memw_locked(%2);" - " {" - " p3 = cmp.eq(%0, %4);" - " if (p3.new) jump:nt 2f;" - " %0 = add(%0, %3);" - " %1 = #0;" - " }" - " memw_locked(%2, p3) = %0;" - " {" - " if !p3 jump 1b;" - " %1 = #1;" - " }" - "2:" - : "=&r" (__oldval), "=&r" (output) - : "r" (v), "r" (a), "r" (u) - : "memory", "p3" - ); - return output; -} - -#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) - -#define atomic_inc(v) atomic_add(1, (v)) -#define atomic_dec(v) atomic_sub(1, (v)) - -#define atomic_inc_and_test(v) (atomic_add_return(1, (v)) == 0) -#define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0) -#define atomic_sub_and_test(i, v) (atomic_sub_return(i, (v)) == 0) -#define atomic_add_negative(i, v) (atomic_add_return(i, (v)) < 0) - - -#define atomic_inc_return(v) (atomic_add_return(1, v)) -#define atomic_dec_return(v) (atomic_sub_return(1, v)) - -#endif |