| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163 |
- /* kernel atomic64 operations
- *
- * For an explanation of how atomic ops work in this arch, see:
- * Documentation/frv/atomic-ops.txt
- *
- * Copyright (C) 2009 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 <asm/spr-regs.h>
- .text
- .balign 4
- ###############################################################################
- #
- # long long atomic64_inc_return(atomic64_t *v)
- #
- ###############################################################################
- .globl atomic64_inc_return
- .type atomic64_inc_return,@function
- atomic64_inc_return:
- or.p gr8,gr8,gr10
- 0:
- orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */
- ckeq icc3,cc7
- ldd.p @(gr10,gr0),gr8 /* LDD.P/ORCR must be atomic */
- orcr cc7,cc7,cc3 /* set CC3 to true */
- addicc gr9,#1,gr9,icc0
- addxi gr8,#0,gr8,icc0
- cstd.p gr8,@(gr10,gr0) ,cc3,#1
- corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */
- beq icc3,#0,0b
- bralr
- .size atomic64_inc_return, .-atomic64_inc_return
- ###############################################################################
- #
- # long long atomic64_dec_return(atomic64_t *v)
- #
- ###############################################################################
- .globl atomic64_dec_return
- .type atomic64_dec_return,@function
- atomic64_dec_return:
- or.p gr8,gr8,gr10
- 0:
- orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */
- ckeq icc3,cc7
- ldd.p @(gr10,gr0),gr8 /* LDD.P/ORCR must be atomic */
- orcr cc7,cc7,cc3 /* set CC3 to true */
- subicc gr9,#1,gr9,icc0
- subxi gr8,#0,gr8,icc0
- cstd.p gr8,@(gr10,gr0) ,cc3,#1
- corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */
- beq icc3,#0,0b
- bralr
- .size atomic64_dec_return, .-atomic64_dec_return
- ###############################################################################
- #
- # long long atomic64_add_return(long long i, atomic64_t *v)
- #
- ###############################################################################
- .globl atomic64_add_return
- .type atomic64_add_return,@function
- atomic64_add_return:
- or.p gr8,gr8,gr4
- or gr9,gr9,gr5
- 0:
- orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */
- ckeq icc3,cc7
- ldd.p @(gr10,gr0),gr8 /* LDD.P/ORCR must be atomic */
- orcr cc7,cc7,cc3 /* set CC3 to true */
- addcc gr9,gr5,gr9,icc0
- addx gr8,gr4,gr8,icc0
- cstd.p gr8,@(gr10,gr0) ,cc3,#1
- corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */
- beq icc3,#0,0b
- bralr
- .size atomic64_add_return, .-atomic64_add_return
- ###############################################################################
- #
- # long long atomic64_sub_return(long long i, atomic64_t *v)
- #
- ###############################################################################
- .globl atomic64_sub_return
- .type atomic64_sub_return,@function
- atomic64_sub_return:
- or.p gr8,gr8,gr4
- or gr9,gr9,gr5
- 0:
- orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */
- ckeq icc3,cc7
- ldd.p @(gr10,gr0),gr8 /* LDD.P/ORCR must be atomic */
- orcr cc7,cc7,cc3 /* set CC3 to true */
- subcc gr9,gr5,gr9,icc0
- subx gr8,gr4,gr8,icc0
- cstd.p gr8,@(gr10,gr0) ,cc3,#1
- corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */
- beq icc3,#0,0b
- bralr
- .size atomic64_sub_return, .-atomic64_sub_return
- ###############################################################################
- #
- # uint64_t __xchg_64(uint64_t i, uint64_t *v)
- #
- ###############################################################################
- .globl __xchg_64
- .type __xchg_64,@function
- __xchg_64:
- or.p gr8,gr8,gr4
- or gr9,gr9,gr5
- 0:
- orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */
- ckeq icc3,cc7
- ldd.p @(gr10,gr0),gr8 /* LDD.P/ORCR must be atomic */
- orcr cc7,cc7,cc3 /* set CC3 to true */
- cstd.p gr4,@(gr10,gr0) ,cc3,#1
- corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */
- beq icc3,#0,0b
- bralr
- .size __xchg_64, .-__xchg_64
- ###############################################################################
- #
- # uint64_t __cmpxchg_64(uint64_t test, uint64_t new, uint64_t *v)
- #
- ###############################################################################
- .globl __cmpxchg_64
- .type __cmpxchg_64,@function
- __cmpxchg_64:
- or.p gr8,gr8,gr4
- or gr9,gr9,gr5
- 0:
- orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */
- ckeq icc3,cc7
- ldd.p @(gr12,gr0),gr8 /* LDD.P/ORCR must be atomic */
- orcr cc7,cc7,cc3
- subcc gr8,gr4,gr0,icc0
- subcc.p gr9,gr5,gr0,icc1
- bnelr icc0,#0
- bnelr icc1,#0
- cstd.p gr10,@(gr12,gr0) ,cc3,#1
- corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */
- beq icc3,#0,0b
- bralr
- .size __cmpxchg_64, .-__cmpxchg_64
|
