30f5a410b6
Add some overflow checks to read/write (from bde). Change all modifications to vm_page::flags, vm_page::busy, vm_object::flags and vm_object::paging_in_progress to use operations which are not interruptable. Reviewed by: Bruce Evans <bde@zeta.org.au>
233 lines
4.1 KiB
ArmAsm
233 lines
4.1 KiB
ArmAsm
/*-
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* Copyright (c) 1998 Doug Rabson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id$
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*/
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#include <machine/asm.h>
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.text
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LEAF(atomic_set_8, 2)
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bic a0, 3, t1
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0: ldl_l t2, 0(t1)
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extbl t2, a0, t0
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bis t0, a1, t0
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insbl t0, a0, t0
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mskbl t2, a0, t2
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or t2, t0, t0
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stl_c t0, 0(t1)
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beq t0, 1f
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mb
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RET
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1: br 0b
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END(atomic_set_8)
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LEAF(atomic_clear_8, 2)
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bic a0, 3, t1
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0: ldl_l t2, 0(t1)
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extbl t2, a0, t0
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bic t0, a1, t0
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insbl t0, a0, t0
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mskbl t2, a0, t2
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or t2, t0, t0
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stl_c t0, 0(t1)
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beq t0, 1f
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mb
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RET
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1: br 0b
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END(atomic_clear_8)
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LEAF(atomic_add_8, 2)
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bic a0, 3, t1
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0: ldl_l t2, 0(t1)
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extbl t2, a0, t0
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addl t0, a1, t0
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insbl t0, a0, t0
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mskbl t2, a0, t2
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or t2, t0, t0
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stl_c t0, 0(t1)
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beq t0, 1f
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mb
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RET
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1: br 0b
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END(atomic_add_8)
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LEAF(atomic_subtract_8, 2)
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bic a0, 3, t1
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0: ldl_l t2, 0(t1)
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extbl t2, a0, t0
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subl t0, a1, t0
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insbl t0, a0, t0
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mskbl t2, a0, t2
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or t2, t0, t0
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stl_c t0, 0(t1)
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beq t0, 1f
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mb
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RET
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1: br 0b
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END(atomic_subtract_8)
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LEAF(atomic_set_16, 2)
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bic a0, 3, t1
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0: ldl_l t2, 0(t1)
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extwl t2, a0, t0
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bis t0, a1, t0
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inswl t0, a0, t0
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mskwl t2, a0, t2
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or t2, t0, t0
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stl_c t0, 0(t1)
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beq t0, 1f
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mb
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RET
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1: br 0b
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END(atomic_set_16)
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LEAF(atomic_clear_16, 2)
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bic a0, 3, t1
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0: ldl_l t2, 0(t1)
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extwl t2, a0, t0
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bic t0, a1, t0
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inswl t0, a0, t0
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mskwl t2, a0, t2
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or t2, t0, t0
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stl_c t0, 0(t1)
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beq t0, 1f
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mb
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RET
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1: br 0b
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END(atomic_clear_16)
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LEAF(atomic_add_16, 2)
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bic a0, 3, t1
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0: ldl_l t2, 0(t1)
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extwl t2, a0, t0
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addl t0, a1, t0
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inswl t0, a0, t0
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mskwl t2, a0, t2
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or t2, t0, t0
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stl_c t0, 0(t1)
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beq t0, 1f
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mb
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RET
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1: br 0b
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END(atomic_add_16)
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LEAF(atomic_subtract_16, 2)
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bic a0, 3, t1
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0: ldl_l t2, 0(t1)
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extwl t2, a0, t0
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subl t0, a1, t0
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inswl t0, a0, t0
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mskwl t2, a0, t2
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or t2, t0, t0
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stl_c t0, 0(t1)
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beq t0, 1f
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mb
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RET
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1: br 0b
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END(atomic_subtract_16)
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LEAF(atomic_set_32, 2)
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0: ldl_l t0, 0(a0)
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bis t0, a1, t0
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stl_c t0, 0(a0)
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beq t0, 1f
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mb
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RET
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1: br 0b
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END(atomic_set_32)
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LEAF(atomic_clear_32, 2)
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0: ldl_l t0, 0(a0)
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bic t0, a1, t0
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stl_c t0, 0(a0)
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beq t0, 1f
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mb
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RET
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1: br 0b
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END(atomic_clear_32)
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LEAF(atomic_add_32, 2)
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0: ldl_l t0, 0(a0)
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addl t0, a1, t0
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stl_c t0, 0(a0)
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beq t0, 1f
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mb
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RET
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1: br 0b
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END(atomic_add_32)
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LEAF(atomic_subtract_32, 2)
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0: ldl_l t0, 0(a0)
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subl t0, a1, t0
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stl_c t0, 0(a0)
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beq t0, 1f
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mb
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RET
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1: br 0b
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END(atomic_subtract_32)
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LEAF(atomic_set_64, 2)
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0: ldq_l t0, 0(a0)
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bis t0, a1, t0
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stq_c t0, 0(a0)
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beq t0, 1f
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mb
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RET
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1: br 0b
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END(atomic_set_64)
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LEAF(atomic_clear_64, 2)
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0: ldq_l t0, 0(a0)
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bic t0, a1, t0
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stq_c t0, 0(a0)
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beq t0, 1f
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mb
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RET
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1: br 0b
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END(atomic_clear_64)
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LEAF(atomic_add_64, 2)
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0: ldq_l t0, 0(a0)
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addq t0, a1, t0
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stq_c t0, 0(a0)
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beq t0, 1f
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mb
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RET
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1: br 0b
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END(atomic_add_64)
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LEAF(atomic_subtract_64, 2)
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0: ldq_l t0, 0(a0)
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subq t0, a1, t0
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stq_c t0, 0(a0)
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beq t0, 1f
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mb
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RET
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1: br 0b
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END(atomic_subtract_64)
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