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/*
* Context switch for the Reneas M32C
*
* COPYRIGHT (c) 1989-2008.
* 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.com/license/LICENSE.
*
* $Id$
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#define ARG_EXECUTING 8
#define ARG_HEIR 12
#define CTXT_SP 0
#define CTXT_FB 4
.file "context_switch.S"
.text
.global __CPU_Context_switch
.type __CPU_Context_switch, @function
__CPU_Context_switch:
enter #0
pushm a0,a1,r0,r1,r2,r3
pushc flg
pushc sb
#if defined(__r8c_cpu__)
#warning "not implemented on R8C"
#else
mov.l ARG_EXECUTING[fb],a0 ; a0 = executing
stc fb,a1
mov.l a1,CTXT_FB[a0] ; save fb
stc sp,a1
mov.l a1,CTXT_SP[a0] ; save sp
mov.l ARG_HEIR[fb],a0 ; a0 = heir
restore:
mov.l CTXT_SP[a0],a1
ldc a1,sp ; restore sp
mov.l CTXT_FB[a0],a1
ldc a1,fb ; restore fb
#endif
popc sb
popc flg
popm a0,a1,r0,r1,r2,r3
exitd
.size __CPU_Context_switch, .-__CPU_Context_switch
#define ARG_RESTART 8
.global __CPU_Context_Restart_self
.type __CPU_Context_Restart_self, @function
__CPU_Context_Restart_self:
enter #0
#if defined(__r8c_cpu__)
#warning "__CPU_Context_Restart_self: not implemented on R8C"
#else
mov.l ARG_RESTART[fb],a0 ; a0 = heir
jmp.s restore
#endif
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