diff options
Diffstat (limited to 'include/asm-mips/futex.h')
| -rw-r--r-- | include/asm-mips/futex.h | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/include/asm-mips/futex.h b/include/asm-mips/futex.h deleted file mode 100644 index b9cce90..0000000 --- a/include/asm-mips/futex.h +++ /dev/null @@ -1,203 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (c) 2006 Ralf Baechle (ralf@linux-mips.org) - */ -#ifndef _ASM_FUTEX_H -#define _ASM_FUTEX_H - -#ifdef __KERNEL__ - -#include <linux/futex.h> -#include <linux/uaccess.h> -#include <asm/barrier.h> -#include <asm/errno.h> -#include <asm/war.h> - -#define __futex_atomic_op(insn, ret, oldval, uaddr, oparg) \ -{ \ - if (cpu_has_llsc && R10000_LLSC_WAR) { \ - __asm__ __volatile__( \ - " .set push \n" \ - " .set noat \n" \ - " .set mips3 \n" \ - "1: ll %1, %4 # __futex_atomic_op \n" \ - " .set mips0 \n" \ - " " insn " \n" \ - " .set mips3 \n" \ - "2: sc $1, %2 \n" \ - " beqzl $1, 1b \n" \ - __WEAK_LLSC_MB \ - "3: \n" \ - " .set pop \n" \ - " .set mips0 \n" \ - " .section .fixup,\"ax\" \n" \ - "4: li %0, %6 \n" \ - " j 3b \n" \ - " .previous \n" \ - " .section __ex_table,\"a\" \n" \ - " "__UA_ADDR "\t1b, 4b \n" \ - " "__UA_ADDR "\t2b, 4b \n" \ - " .previous \n" \ - : "=r" (ret), "=&r" (oldval), "=R" (*uaddr) \ - : "0" (0), "R" (*uaddr), "Jr" (oparg), "i" (-EFAULT) \ - : "memory"); \ - } else if (cpu_has_llsc) { \ - __asm__ __volatile__( \ - " .set push \n" \ - " .set noat \n" \ - " .set mips3 \n" \ - "1: ll %1, %4 # __futex_atomic_op \n" \ - " .set mips0 \n" \ - " " insn " \n" \ - " .set mips3 \n" \ - "2: sc $1, %2 \n" \ - " beqz $1, 1b \n" \ - __WEAK_LLSC_MB \ - "3: \n" \ - " .set pop \n" \ - " .set mips0 \n" \ - " .section .fixup,\"ax\" \n" \ - "4: li %0, %6 \n" \ - " j 3b \n" \ - " .previous \n" \ - " .section __ex_table,\"a\" \n" \ - " "__UA_ADDR "\t1b, 4b \n" \ - " "__UA_ADDR "\t2b, 4b \n" \ - " .previous \n" \ - : "=r" (ret), "=&r" (oldval), "=R" (*uaddr) \ - : "0" (0), "R" (*uaddr), "Jr" (oparg), "i" (-EFAULT) \ - : "memory"); \ - } else \ - ret = -ENOSYS; \ -} - -static inline int -futex_atomic_op_inuser(int encoded_op, int __user *uaddr) -{ - int op = (encoded_op >> 28) & 7; - int cmp = (encoded_op >> 24) & 15; - int oparg = (encoded_op << 8) >> 20; - int cmparg = (encoded_op << 20) >> 20; - int oldval = 0, ret; - if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28)) - oparg = 1 << oparg; - - if (! access_ok (VERIFY_WRITE, uaddr, sizeof(int))) - return -EFAULT; - - pagefault_disable(); - - switch (op) { - case FUTEX_OP_SET: - __futex_atomic_op("move $1, %z5", ret, oldval, uaddr, oparg); - break; - - case FUTEX_OP_ADD: - __futex_atomic_op("addu $1, %1, %z5", - ret, oldval, uaddr, oparg); - break; - case FUTEX_OP_OR: - __futex_atomic_op("or $1, %1, %z5", - ret, oldval, uaddr, oparg); - break; - case FUTEX_OP_ANDN: - __futex_atomic_op("and $1, %1, %z5", - ret, oldval, uaddr, ~oparg); - break; - case FUTEX_OP_XOR: - __futex_atomic_op("xor $1, %1, %z5", - ret, oldval, uaddr, oparg); - break; - default: - ret = -ENOSYS; - } - - pagefault_enable(); - - if (!ret) { - switch (cmp) { - case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break; - case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break; - case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break; - case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break; - case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break; - case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break; - default: ret = -ENOSYS; - } - } - return ret; -} - -static inline int -futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval) -{ - int retval; - - if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int))) - return -EFAULT; - - if (cpu_has_llsc && R10000_LLSC_WAR) { - __asm__ __volatile__( - "# futex_atomic_cmpxchg_inatomic \n" - " .set push \n" - " .set noat \n" - " .set mips3 \n" - "1: ll %0, %2 \n" - " bne %0, %z3, 3f \n" - " .set mips0 \n" - " move $1, %z4 \n" - " .set mips3 \n" - "2: sc $1, %1 \n" - " beqzl $1, 1b \n" - __WEAK_LLSC_MB - "3: \n" - " .set pop \n" - " .section .fixup,\"ax\" \n" - "4: li %0, %5 \n" - " j 3b \n" - " .previous \n" - " .section __ex_table,\"a\" \n" - " "__UA_ADDR "\t1b, 4b \n" - " "__UA_ADDR "\t2b, 4b \n" - " .previous \n" - : "=&r" (retval), "=R" (*uaddr) - : "R" (*uaddr), "Jr" (oldval), "Jr" (newval), "i" (-EFAULT) - : "memory"); - } else if (cpu_has_llsc) { - __asm__ __volatile__( - "# futex_atomic_cmpxchg_inatomic \n" - " .set push \n" - " .set noat \n" - " .set mips3 \n" - "1: ll %0, %2 \n" - " bne %0, %z3, 3f \n" - " .set mips0 \n" - " move $1, %z4 \n" - " .set mips3 \n" - "2: sc $1, %1 \n" - " beqz $1, 1b \n" - __WEAK_LLSC_MB - "3: \n" - " .set pop \n" - " .section .fixup,\"ax\" \n" - "4: li %0, %5 \n" - " j 3b \n" - " .previous \n" - " .section __ex_table,\"a\" \n" - " "__UA_ADDR "\t1b, 4b \n" - " "__UA_ADDR "\t2b, 4b \n" - " .previous \n" - : "=&r" (retval), "=R" (*uaddr) - : "R" (*uaddr), "Jr" (oldval), "Jr" (newval), "i" (-EFAULT) - : "memory"); - } else - return -ENOSYS; - - return retval; -} - -#endif -#endif /* _ASM_FUTEX_H */ |
