| /* 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 | |