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https://github.com/torvalds/linux
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00460f41ff
Implement atomic64_t and its ops for FRV. Tested with the following patch:
diff --git a/arch/frv/kernel/setup.c b/arch/frv/kernel/setup.c
index 55e4fab..086d50d 100644
--- a/arch/frv/kernel/setup.c
+++ b/arch/frv/kernel/setup.c
@@ -746,6 +746,52 @@ static void __init parse_cmdline_early(char *cmdline)
} /* end parse_cmdline_early() */
+static atomic64_t xxx;
+
+static void test_atomic64(void)
+{
+ atomic64_set(&xxx, 0x12300000023LL);
+
+ mb();
+ BUG_ON(atomic64_read(&xxx) != 0x12300000023LL);
+ mb();
+ if (atomic64_inc_return(&xxx) != 0x12300000024LL)
+ BUG();
+ mb();
+ BUG_ON(atomic64_read(&xxx) != 0x12300000024LL);
+ mb();
+ if (atomic64_sub_return(0x36900000050LL, &xxx) != -0x2460000002cLL)
+ BUG();
+ mb();
+ BUG_ON(atomic64_read(&xxx) != -0x2460000002cLL);
+ mb();
+ if (atomic64_dec_return(&xxx) != -0x2460000002dLL)
+ BUG();
+ mb();
+ BUG_ON(atomic64_read(&xxx) != -0x2460000002dLL);
+ mb();
+ if (atomic64_add_return(0x36800000001LL, &xxx) != 0x121ffffffd4LL)
+ BUG();
+ mb();
+ BUG_ON(atomic64_read(&xxx) != 0x121ffffffd4LL);
+ mb();
+ if (atomic64_cmpxchg(&xxx, 0x123456789abcdefLL, 0x121ffffffd4LL) != 0x121ffffffd4LL)
+ BUG();
+ mb();
+ BUG_ON(atomic64_read(&xxx) != 0x121ffffffd4LL);
+ mb();
+ if (atomic64_cmpxchg(&xxx, 0x121ffffffd4LL, 0x123456789abcdefLL) != 0x121ffffffd4LL)
+ BUG();
+ mb();
+ BUG_ON(atomic64_read(&xxx) != 0x123456789abcdefLL);
+ mb();
+ if (atomic64_xchg(&xxx, 0xabcdef123456789LL) != 0x123456789abcdefLL)
+ BUG();
+ mb();
+ BUG_ON(atomic64_read(&xxx) != 0xabcdef123456789LL);
+ mb();
+}
+
/*****************************************************************************/
/*
*
@@ -845,6 +891,8 @@ void __init setup_arch(char **cmdline_p)
// asm volatile("movgs %0,timerd" :: "r"(10000000));
// __set_HSR(0, __get_HSR(0) | HSR0_ETMD);
+ test_atomic64();
+
} /* end setup_arch() */
#if 0
Note that this doesn't cover all the trivial wrappers, but does cover all the
substantial implementations.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
162 lines
4.7 KiB
ArmAsm
162 lines
4.7 KiB
ArmAsm
/* kernel atomic64 operations
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*
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* For an explanation of how atomic ops work in this arch, see:
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* Documentation/frv/atomic-ops.txt
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*
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* Copyright (C) 2009 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <asm/spr-regs.h>
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.text
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.balign 4
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###############################################################################
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#
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# long long atomic64_inc_return(atomic64_t *v)
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#
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###############################################################################
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.globl atomic64_inc_return
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.type atomic64_inc_return,@function
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atomic64_inc_return:
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or.p gr8,gr8,gr10
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0:
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orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */
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ckeq icc3,cc7
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ldd.p @(gr10,gr0),gr8 /* LDD.P/ORCR must be atomic */
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orcr cc7,cc7,cc3 /* set CC3 to true */
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addicc gr9,#1,gr9,icc0
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addxi gr8,#0,gr8,icc0
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cstd.p gr8,@(gr10,gr0) ,cc3,#1
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corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */
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beq icc3,#0,0b
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bralr
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.size atomic64_inc_return, .-atomic64_inc_return
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###############################################################################
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#
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# long long atomic64_dec_return(atomic64_t *v)
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#
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###############################################################################
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.globl atomic64_dec_return
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.type atomic64_dec_return,@function
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atomic64_dec_return:
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or.p gr8,gr8,gr10
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0:
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orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */
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ckeq icc3,cc7
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ldd.p @(gr10,gr0),gr8 /* LDD.P/ORCR must be atomic */
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orcr cc7,cc7,cc3 /* set CC3 to true */
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subicc gr9,#1,gr9,icc0
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subxi gr8,#0,gr8,icc0
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cstd.p gr8,@(gr10,gr0) ,cc3,#1
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corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */
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beq icc3,#0,0b
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bralr
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.size atomic64_dec_return, .-atomic64_dec_return
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###############################################################################
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#
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# long long atomic64_add_return(long long i, atomic64_t *v)
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#
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###############################################################################
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.globl atomic64_add_return
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.type atomic64_add_return,@function
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atomic64_add_return:
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or.p gr8,gr8,gr4
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or gr9,gr9,gr5
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0:
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orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */
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ckeq icc3,cc7
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ldd.p @(gr10,gr0),gr8 /* LDD.P/ORCR must be atomic */
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orcr cc7,cc7,cc3 /* set CC3 to true */
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addcc gr9,gr5,gr9,icc0
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addx gr8,gr4,gr8,icc0
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cstd.p gr8,@(gr10,gr0) ,cc3,#1
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corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */
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beq icc3,#0,0b
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bralr
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.size atomic64_add_return, .-atomic64_add_return
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###############################################################################
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#
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# long long atomic64_sub_return(long long i, atomic64_t *v)
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#
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###############################################################################
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.globl atomic64_sub_return
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.type atomic64_sub_return,@function
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atomic64_sub_return:
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or.p gr8,gr8,gr4
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or gr9,gr9,gr5
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0:
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orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */
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ckeq icc3,cc7
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ldd.p @(gr10,gr0),gr8 /* LDD.P/ORCR must be atomic */
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orcr cc7,cc7,cc3 /* set CC3 to true */
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subcc gr9,gr5,gr9,icc0
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subx gr8,gr4,gr8,icc0
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cstd.p gr8,@(gr10,gr0) ,cc3,#1
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corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */
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beq icc3,#0,0b
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bralr
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.size atomic64_sub_return, .-atomic64_sub_return
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###############################################################################
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#
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# uint64_t __xchg_64(uint64_t i, uint64_t *v)
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#
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###############################################################################
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.globl __xchg_64
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.type __xchg_64,@function
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__xchg_64:
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or.p gr8,gr8,gr4
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or gr9,gr9,gr5
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0:
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orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */
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ckeq icc3,cc7
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ldd.p @(gr10,gr0),gr8 /* LDD.P/ORCR must be atomic */
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orcr cc7,cc7,cc3 /* set CC3 to true */
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cstd.p gr4,@(gr10,gr0) ,cc3,#1
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corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */
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beq icc3,#0,0b
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bralr
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.size __xchg_64, .-__xchg_64
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###############################################################################
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#
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# uint64_t __cmpxchg_64(uint64_t test, uint64_t new, uint64_t *v)
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#
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###############################################################################
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.globl __cmpxchg_64
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.type __cmpxchg_64,@function
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__cmpxchg_64:
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or.p gr8,gr8,gr4
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or gr9,gr9,gr5
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0:
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orcc gr0,gr0,gr0,icc3 /* set ICC3.Z */
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ckeq icc3,cc7
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ldd.p @(gr12,gr0),gr8 /* LDD.P/ORCR must be atomic */
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orcr cc7,cc7,cc3
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subcc gr8,gr4,gr0,icc0
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subcc.p gr9,gr5,gr0,icc1
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bnelr icc0,#0
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bnelr icc1,#0
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cstd.p gr10,@(gr12,gr0) ,cc3,#1
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corcc gr29,gr29,gr0 ,cc3,#1 /* clear ICC3.Z if store happens */
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beq icc3,#0,0b
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bralr
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.size __cmpxchg_64, .-__cmpxchg_64
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