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/* V5.2.0 - Copyright (C) 2003-2009 Richard Barry.
This file is part of the distribution. is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License (version 2) as published
by the Free Software Foundation and modified by the FreeRTOS exception. is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along
with; if not, write to the Free Software Foundation, Inc., 59
Temple Place, Suite 330, Boston, MA 02111-1307 USA.
A special exception to the GPL is included to allow you to distribute a
combined work that includes without being obliged to provide
the source code for any proprietary components. See the licensing section
of for full details.
* *
* Get the FreeRTOS eBook! See *
* *
* This is a concise, step by step, 'hands on' guide that describes both *
* general multitasking concepts and FreeRTOS specifics. It presents and *
* explains numerous examples that are written using the FreeRTOS API. *
* Full source code for all the examples is provided in an accompanying *
* .zip file. *
* *
1 tab == 4 spaces!
Please ensure to read the configuration and relevant port sections of the
online documentation. - Documentation, latest information, license and
contact details. - A version that is certified for use in safety
critical systems. - Commercial support, development, porting,
licensing and training services.
EXTERN usCriticalNesting
#include "FreeRTOSConfig.h"
; Context save and restore macro definitions
add -0x0C,sp ; prepare stack to save necessary values
st.w lp,8[sp] ; store LP to stack
stsr 0,r31
st.w lp,4[sp] ; store EIPC to stack
stsr 1,lp
st.w lp,0[sp] ; store EIPSW to stack
#if configDATA_MODE == 1 ; Using the Tiny data model
prepare {r20,r21,r22,r23,r24,r25,r26,r27,r28,r29,r30},76,sp ; save general purpose registers
sst.w r19,72[ep]
sst.w r18,68[ep]
sst.w r17,64[ep]
sst.w r16,60[ep]
sst.w r15,56[ep]
sst.w r14,52[ep]
sst.w r13,48[ep]
sst.w r12,44[ep]
sst.w r11,40[ep]
sst.w r10,36[ep]
sst.w r9,32[ep]
sst.w r8,28[ep]
sst.w r7,24[ep]
sst.w r6,20[ep]
sst.w r5,16[ep]
sst.w r4,12[ep]
#else ; Using the Small/Large data model
prepare {r20,r21,r22,r23,r24,r26,r27,r28,r29,r30},72,sp ; save general purpose registers
sst.w r19,68[ep]
sst.w r18,64[ep]
sst.w r17,60[ep]
sst.w r16,56[ep]
sst.w r15,52[ep]
sst.w r14,48[ep]
sst.w r13,44[ep]
sst.w r12,40[ep]
sst.w r11,36[ep]
sst.w r10,32[ep]
sst.w r9,28[ep]
sst.w r8,24[ep]
sst.w r7,20[ep]
sst.w r6,16[ep]
sst.w r5,12[ep]
#endif /* configDATA_MODE */
sst.w r2,8[ep]
sst.w r1,4[ep]
MOVHI hi1(usCriticalNesting),r0,r1 ; save usCriticalNesting value to stack
ld.w lw1(usCriticalNesting)[r1],r2
sst.w r2,0[ep]
MOVHI hi1(pxCurrentTCB),r0,r1 ; save SP to top of current TCB
ld.w lw1(pxCurrentTCB)[r1],r2
st.w sp,0[r2]
MOVHI hi1(pxCurrentTCB),r0,r1 ; get Stackpointer address
ld.w lw1(pxCurrentTCB)[r1],sp
MOV sp,r1
ld.w 0[r1],sp ; load stackpointer
MOV sp,ep ; set stack pointer to element pointer
sld.w 0[ep],r1 ; load usCriticalNesting value from stack
MOVHI hi1(usCriticalNesting),r0,r2
st.w r1,lw1(usCriticalNesting)[r2]
sld.w 4[ep],r1 ; restore general purpose registers
sld.w 8[ep],r2
#if configDATA_MODE == 1 ; Using Tiny data model
sld.w 12[ep],r4
sld.w 16[ep],r5
sld.w 20[ep],r6
sld.w 24[ep],r7
sld.w 28[ep],r8
sld.w 32[ep],r9
sld.w 36[ep],r10
sld.w 40[ep],r11
sld.w 44[ep],r12
sld.w 48[ep],r13
sld.w 52[ep],r14
sld.w 56[ep],r15
sld.w 60[ep],r16
sld.w 64[ep],r17
sld.w 68[ep],r18
sld.w 72[ep],r19
dispose 76,{r20,r21,r22,r23,r24,r25,r26,r27,r28,r29,r30}
#else ; Using Small/Large data model
sld.w 12[ep],r5
sld.w 16[ep],r6
sld.w 20[ep],r7
sld.w 24[ep],r8
sld.w 28[ep],r9
sld.w 32[ep],r10
sld.w 36[ep],r11
sld.w 40[ep],r12
sld.w 44[ep],r13
sld.w 48[ep],r14
sld.w 52[ep],r15
sld.w 56[ep],r16
sld.w 60[ep],r17
sld.w 64[ep],r18
sld.w 68[ep],r19
dispose 72,{r20,r21,r22,r23,r24,r26,r27,r28,r29,r30}
#endif /* configDATA_MODE */
ld.w 0[sp],lp ; restore EIPSW from stack
ldsr lp,1
ld.w 4[sp],lp ; restore EIPC from stack
ldsr lp,0
ld.w 8[sp],lp ; restore LP from stack
add 0x0C,sp ; set SP to right position