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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (c) 2011 embedded brains GmbH
*
* Copyright (c) 2006 Kolja Waschk (rtemsdev/ixo.de)
*
* Derived from no_cpu/cpu_asm.S, copyright (c) 1989-1999,
* On-Line Applications Research Corporation (OAR).
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT OWNER 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/percpu.h>
#include <rtems/score/nios2-utility.h>
.extern _Per_CPU_Information
.globl _CPU_Context_switch
.globl _CPU_Context_restore
_CPU_Context_switch:
ldw r9, %gprel(_Per_CPU_Information + PER_CPU_ISR_DISPATCH_DISABLE)(gp)
rdctl r8, status
stw r16, NIOS2_CONTEXT_OFFSET_R16(r4)
stw r17, NIOS2_CONTEXT_OFFSET_R17(r4)
stw r18, NIOS2_CONTEXT_OFFSET_R18(r4)
stw r19, NIOS2_CONTEXT_OFFSET_R19(r4)
stw r20, NIOS2_CONTEXT_OFFSET_R20(r4)
stw r21, NIOS2_CONTEXT_OFFSET_R21(r4)
stw r22, NIOS2_CONTEXT_OFFSET_R22(r4)
stw r23, NIOS2_CONTEXT_OFFSET_R23(r4)
stw fp, NIOS2_CONTEXT_OFFSET_FP(r4)
stw r8, NIOS2_CONTEXT_OFFSET_STATUS(r4)
stw sp, NIOS2_CONTEXT_OFFSET_SP(r4)
stw ra, NIOS2_CONTEXT_OFFSET_RA(r4)
stw r9, NIOS2_CONTEXT_OFFSET_ISR_DISPATCH_DISABLE(r4)
restore:
ldw r10, NIOS2_CONTEXT_OFFSET_ISR_DISPATCH_DISABLE(r5)
ldw r16, NIOS2_CONTEXT_OFFSET_R16(r5)
ldw r17, NIOS2_CONTEXT_OFFSET_R17(r5)
ldw r18, NIOS2_CONTEXT_OFFSET_R18(r5)
ldw r19, NIOS2_CONTEXT_OFFSET_R19(r5)
ldw r20, NIOS2_CONTEXT_OFFSET_R20(r5)
ldw r21, NIOS2_CONTEXT_OFFSET_R21(r5)
ldw r22, NIOS2_CONTEXT_OFFSET_R22(r5)
ldw r23, NIOS2_CONTEXT_OFFSET_R23(r5)
ldw fp, NIOS2_CONTEXT_OFFSET_FP(r5)
stw r10, %gprel(_Per_CPU_Information + PER_CPU_ISR_DISPATCH_DISABLE)(gp)
ldw r11, NIOS2_CONTEXT_OFFSET_STATUS(r5)
ldw sp, NIOS2_CONTEXT_OFFSET_SP(r5)
ldw ra, NIOS2_CONTEXT_OFFSET_RA(r5)
wrctl status, r11
ret
_CPU_Context_restore:
mov r5, r4
br restore
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