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/* $NetBSD: spl.S,v 1.1 1996/03/08 18:03:15 mark Exp $ */
/*
* Copyright (c) 1996 Mark Brinicombe.
* Copyright (c) Brini.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Brini.
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* RiscBSD kernel project
*
* splasm.S
*
* spl routines
*
* Created : 01/03/96
*
* $Id: spl.S,v 1.1 1996/04/24 11:08:28 deraadt Exp $
*/
#include "assym.h"
#include <machine/psl.h>
sp .req r13
lr .req r14
pc .req r15
.text
.align 0
Lcurrent_spl_level:
.word _current_spl_level
Lspl_masks:
.word _spl_masks
Lspl_mask:
.word _spl_mask
.global _raisespl
_raisespl:
mov r3, r0 /* Save the new value */
ldr r1, Lcurrent_spl_level /* Get the current spl level */
ldr r0, [r1]
cmp r3, r0
movle pc, lr
str r3, [r1] /* Store the new spl mask */
ldr r2, Lspl_masks /* Get the spl mask */
ldr r2, [r2, r3, lsl #2]
ldr r1, Lspl_mask /* Store in the current spl mask */
str r2, [r1]
stmfd sp!, {r0, lr} /* Preserve registers */
bl _irq_setmasks /* Update the actual masks */
ldmfd sp!, {r0, pc} /* Exit */
.global _lowerspl
_lowerspl:
mov r3, r0 /* Save the new value */
ldr r1, Lcurrent_spl_level /* Get the current spl level */
ldr r0, [r1]
cmp r3, r0
movge pc, lr
str r3, [r1] /* Store the new spl mask */
ldr r2, Lspl_masks /* Get the spl mask */
ldr r2, [r2, r3, lsl #2]
ldr r1, Lspl_mask /* Store in the current spl mask */
str r2, [r1]
stmfd sp!, {r0, lr} /* Preserve registers */
bl _irq_setmasks /* Update the actual masks */
ldmfd sp!, {r0, pc} /* Exit */
.global _splx
_splx:
mov r3, r0 /* Save the new value */
ldr r1, Lcurrent_spl_level /* Get the current spl level */
ldr r0, [r1]
cmp r3, r0
moveq pc, lr
str r3, [r1] /* Store the new spl mask */
ldr r2, Lspl_masks /* Get the spl mask */
ldr r2, [r2, r3, lsl #2]
ldr r1, Lspl_mask /* Store in the current spl mask */
str r2, [r1]
stmfd sp!, {r0, lr} /* Preserve registers */
bl _irq_setmasks /* Update the actual masks */
ldmfd sp!, {r0, pc} /* Exit */
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