You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
149 lines
5.0 KiB
C
149 lines
5.0 KiB
C
/*
|
|
* FreeRTOS Kernel <DEVELOPMENT BRANCH>
|
|
* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy of
|
|
* this software and associated documentation files (the "Software"), to deal in
|
|
* the Software without restriction, including without limitation the rights to
|
|
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
|
|
* the Software, and to permit persons to whom the Software is furnished to do so,
|
|
* subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in all
|
|
* copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
|
|
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
|
|
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
|
|
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* https://www.FreeRTOS.org
|
|
* https://github.com/FreeRTOS
|
|
*
|
|
*/
|
|
|
|
EXTERN pxCurrentTCB
|
|
EXTERN usCriticalNesting
|
|
|
|
#include "FreeRTOSConfig.h"
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
; Context save and restore macro definitions
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
portSAVE_CONTEXT MACRO
|
|
|
|
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]
|
|
ENDM
|
|
|
|
|
|
portRESTORE_CONTEXT MACRO
|
|
|
|
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
|
|
|
|
RETI
|
|
|
|
ENDM
|