diff options
Diffstat (limited to 'arch/frv/kernel/futex.c')
| -rw-r--r-- | arch/frv/kernel/futex.c | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/arch/frv/kernel/futex.c b/arch/frv/kernel/futex.c deleted file mode 100644 index 37f7b2bf7f73..000000000000 --- a/arch/frv/kernel/futex.c +++ /dev/null @@ -1,223 +0,0 @@ -/* futex.c: futex operations - * - * Copyright (C) 2005 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ - -#include <linux/futex.h> -#include <linux/uaccess.h> -#include <asm/futex.h> -#include <asm/errno.h> - -/* - * the various futex operations; MMU fault checking is ignored under no-MMU - * conditions - */ -static inline int atomic_futex_op_xchg_set(int oparg, u32 __user *uaddr, int *_oldval) -{ - int oldval, ret; - - asm("0: \n" - " orcc gr0,gr0,gr0,icc3 \n" /* set ICC3.Z */ - " ckeq icc3,cc7 \n" - "1: ld.p %M0,%1 \n" /* LD.P/ORCR must be atomic */ - " orcr cc7,cc7,cc3 \n" /* set CC3 to true */ - "2: cst.p %3,%M0 ,cc3,#1 \n" - " corcc gr29,gr29,gr0 ,cc3,#1 \n" /* clear ICC3.Z if store happens */ - " beq icc3,#0,0b \n" - " setlos 0,%2 \n" - "3: \n" - ".subsection 2 \n" - "4: setlos %5,%2 \n" - " bra 3b \n" - ".previous \n" - ".section __ex_table,\"a\" \n" - " .balign 8 \n" - " .long 1b,4b \n" - " .long 2b,4b \n" - ".previous" - : "+U"(*uaddr), "=&r"(oldval), "=&r"(ret), "=r"(oparg) - : "3"(oparg), "i"(-EFAULT) - : "memory", "cc7", "cc3", "icc3" - ); - - *_oldval = oldval; - return ret; -} - -static inline int atomic_futex_op_xchg_add(int oparg, u32 __user *uaddr, int *_oldval) -{ - int oldval, ret; - - asm("0: \n" - " orcc gr0,gr0,gr0,icc3 \n" /* set ICC3.Z */ - " ckeq icc3,cc7 \n" - "1: ld.p %M0,%1 \n" /* LD.P/ORCR must be atomic */ - " orcr cc7,cc7,cc3 \n" /* set CC3 to true */ - " add %1,%3,%3 \n" - "2: cst.p %3,%M0 ,cc3,#1 \n" - " corcc gr29,gr29,gr0 ,cc3,#1 \n" /* clear ICC3.Z if store happens */ - " beq icc3,#0,0b \n" - " setlos 0,%2 \n" - "3: \n" - ".subsection 2 \n" - "4: setlos %5,%2 \n" - " bra 3b \n" - ".previous \n" - ".section __ex_table,\"a\" \n" - " .balign 8 \n" - " .long 1b,4b \n" - " .long 2b,4b \n" - ".previous" - : "+U"(*uaddr), "=&r"(oldval), "=&r"(ret), "=r"(oparg) - : "3"(oparg), "i"(-EFAULT) - : "memory", "cc7", "cc3", "icc3" - ); - - *_oldval = oldval; - return ret; -} - -static inline int atomic_futex_op_xchg_or(int oparg, u32 __user *uaddr, int *_oldval) -{ - int oldval, ret; - - asm("0: \n" - " orcc gr0,gr0,gr0,icc3 \n" /* set ICC3.Z */ - " ckeq icc3,cc7 \n" - "1: ld.p %M0,%1 \n" /* LD.P/ORCR must be atomic */ - " orcr cc7,cc7,cc3 \n" /* set CC3 to true */ - " or %1,%3,%3 \n" - "2: cst.p %3,%M0 ,cc3,#1 \n" - " corcc gr29,gr29,gr0 ,cc3,#1 \n" /* clear ICC3.Z if store happens */ - " beq icc3,#0,0b \n" - " setlos 0,%2 \n" - "3: \n" - ".subsection 2 \n" - "4: setlos %5,%2 \n" - " bra 3b \n" - ".previous \n" - ".section __ex_table,\"a\" \n" - " .balign 8 \n" - " .long 1b,4b \n" - " .long 2b,4b \n" - ".previous" - : "+U"(*uaddr), "=&r"(oldval), "=&r"(ret), "=r"(oparg) - : "3"(oparg), "i"(-EFAULT) - : "memory", "cc7", "cc3", "icc3" - ); - - *_oldval = oldval; - return ret; -} - -static inline int atomic_futex_op_xchg_and(int oparg, u32 __user *uaddr, int *_oldval) -{ - int oldval, ret; - - asm("0: \n" - " orcc gr0,gr0,gr0,icc3 \n" /* set ICC3.Z */ - " ckeq icc3,cc7 \n" - "1: ld.p %M0,%1 \n" /* LD.P/ORCR must be atomic */ - " orcr cc7,cc7,cc3 \n" /* set CC3 to true */ - " and %1,%3,%3 \n" - "2: cst.p %3,%M0 ,cc3,#1 \n" - " corcc gr29,gr29,gr0 ,cc3,#1 \n" /* clear ICC3.Z if store happens */ - " beq icc3,#0,0b \n" - " setlos 0,%2 \n" - "3: \n" - ".subsection 2 \n" - "4: setlos %5,%2 \n" - " bra 3b \n" - ".previous \n" - ".section __ex_table,\"a\" \n" - " .balign 8 \n" - " .long 1b,4b \n" - " .long 2b,4b \n" - ".previous" - : "+U"(*uaddr), "=&r"(oldval), "=&r"(ret), "=r"(oparg) - : "3"(oparg), "i"(-EFAULT) - : "memory", "cc7", "cc3", "icc3" - ); - - *_oldval = oldval; - return ret; -} - -static inline int atomic_futex_op_xchg_xor(int oparg, u32 __user *uaddr, int *_oldval) -{ - int oldval, ret; - - asm("0: \n" - " orcc gr0,gr0,gr0,icc3 \n" /* set ICC3.Z */ - " ckeq icc3,cc7 \n" - "1: ld.p %M0,%1 \n" /* LD.P/ORCR must be atomic */ - " orcr cc7,cc7,cc3 \n" /* set CC3 to true */ - " xor %1,%3,%3 \n" - "2: cst.p %3,%M0 ,cc3,#1 \n" - " corcc gr29,gr29,gr0 ,cc3,#1 \n" /* clear ICC3.Z if store happens */ - " beq icc3,#0,0b \n" - " setlos 0,%2 \n" - "3: \n" - ".subsection 2 \n" - "4: setlos %5,%2 \n" - " bra 3b \n" - ".previous \n" - ".section __ex_table,\"a\" \n" - " .balign 8 \n" - " .long 1b,4b \n" - " .long 2b,4b \n" - ".previous" - : "+U"(*uaddr), "=&r"(oldval), "=&r"(ret), "=r"(oparg) - : "3"(oparg), "i"(-EFAULT) - : "memory", "cc7", "cc3", "icc3" - ); - - *_oldval = oldval; - return ret; -} - -/*****************************************************************************/ -/* - * do the futex operations - */ -int arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr) -{ - int oldval = 0, ret; - - pagefault_disable(); - - switch (op) { - case FUTEX_OP_SET: - ret = atomic_futex_op_xchg_set(oparg, uaddr, &oldval); - break; - case FUTEX_OP_ADD: - ret = atomic_futex_op_xchg_add(oparg, uaddr, &oldval); - break; - case FUTEX_OP_OR: - ret = atomic_futex_op_xchg_or(oparg, uaddr, &oldval); - break; - case FUTEX_OP_ANDN: - ret = atomic_futex_op_xchg_and(~oparg, uaddr, &oldval); - break; - case FUTEX_OP_XOR: - ret = atomic_futex_op_xchg_xor(oparg, uaddr, &oldval); - break; - default: - ret = -ENOSYS; - break; - } - - pagefault_enable(); - - if (!ret) - *oval = oldval; - - return ret; - -} /* end arch_futex_atomic_op_inuser() */ |