/*
* 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).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#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
