📄 portasm_hx2.s85
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;/*
; FreeRTOS.org V5.2.0 - Copyright (C) 2003-2009 Richard Barry.
;
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; * *
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; * *
; * 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. *
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; ***************************************************************************
;
; 1 tab == 4 spaces!
;
; Please ensure to read the configuration and relevant port sections of the
; online documentation.
;
; http://www.FreeRTOS.org - Documentation, latest information, license and
; contact details.
;
; http://www.SafeRTOS.com - A version that is certified for use in safety
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; http://www.OpenRTOS.com - Commercial support, development, porting,
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;*/
; Note: Select the correct include files for the device used by the application.
#include "FreeRTOSConfig.h"
;------------------------------------------------------------------------------
; Functions used by scheduler
;------------------------------------------------------------------------------
EXTERN vTaskSwitchContext
EXTERN vTaskIncrementTick
; Variables used by scheduler
;------------------------------------------------------------------------------
EXTERN pxCurrentTCB
EXTERN usCriticalNesting
; Functions implemented in this file
;------------------------------------------------------------------------------
PUBLIC vPortYield
PUBLIC vPortStart
; Security ID definition
;------------------------------------------------------------------------------
#define CG_SECURITY0 0FFH
#define CG_SECURITY1 0FFH
#define CG_SECURITY2 0FFH
#define CG_SECURITY3 0FFH
#define CG_SECURITY4 0FFH
#define CG_SECURITY5 0FFH
#define CG_SECURITY6 0FFH
#define CG_SECURITY7 0FFH
#define CG_SECURITY8 0FFH
#define CG_SECURITY9 0FFH
; Tick ISR Prototype
;------------------------------------------------------------------------------
PUBWEAK `??MD_INTTM0EQ0??INTVEC 544`
PUBLIC MD_INTTM0EQ0
MD_INTTM0EQ0 SYMBOL "MD_INTTM0EQ0"
`??MD_INTTM0EQ0??INTVEC 544` SYMBOL "??INTVEC 544", MD_INTTM0EQ0
;------------------------------------------------------------------------------
; portSAVE_CONTEXT MACRO
; Saves the context of the remaining general purpose registers
; and the usCriticalNesting Value of the active Task onto the task stack
; saves stack pointer to the TCB
;------------------------------------------------------------------------------
portSAVE_CONTEXT MACRO
#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
; Gets stack pointer from the current TCB
; Restores the context of the usCriticalNesting value and general purpose
; registers of the selected task from the task stack
;------------------------------------------------------------------------------
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 */
ENDM
;------------------------------------------------------------------------------
;------------------------------------------------------------------------------
; Restore the context of the first task that is going to run.
;
; Input: NONE
;
; Call: CALL vPortStart
;
; Output: NONE
;------------------------------------------------------------------------------
RSEG CODE:CODE
vPortStart:
portRESTORE_CONTEXT ; Restore the context of whichever task the ...
ld.w 0[sp],lp
ldsr lp,5 ; restore PSW
DI
ld.w 4[sp],lp ; restore LP
ld.w 8[sp],lp ; restore LP
ADD 0x0C,sp ; set SP to right position
EI
jmp [lp]
;------------------------------------------------------------------------------
;------------------------------------------------------------------------------
; Port Yield function to check for a Task switch in the cooperative and
; preemptive mode
;
; Input: NONE
;
; Call: CALL vPortYield
;
; Output: NONE
;------------------------------------------------------------------------------
RSEG CODE:CODE
vPortYield:
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
portSAVE_CONTEXT ; Save the context of the current task.
jarl vTaskSwitchContext,lp ; Call the scheduler.
portRESTORE_CONTEXT ; Restore the context of whichever task the ...
; ... scheduler decided should run.
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
;------------------------------------------------------------------------------
;------------------------------------------------------------------------------
; Perform the necessary steps of the Tick Count Increment and Task Switch
; depending on the chosen kernel configuration
;
; Input: NONE
;
; Call: ISR
;
; Output: NONE
;------------------------------------------------------------------------------
#if configUSE_PREEMPTION == 1 ; use preemptive kernel mode
MD_INTTM0EQ0:
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
portSAVE_CONTEXT ; Save the context of the current task.
jarl vTaskIncrementTick,lp ; Call the timer tick function.
jarl vTaskSwitchContext,lp ; Call the scheduler.
portRESTORE_CONTEXT ; Restore the context of whichever task the ...
; ... scheduler decided should run.
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
;------------------------------------------------------------------------------
#else ; use cooperative kernel mode
MD_INTTM0EQ0:
prepare {lp,ep},8,sp
sst.w r1,4[ep]
sst.w r5,0[ep]
jarl vTaskIncrementTick,lp ; Call the timer tick function.
sld.w 0[ep],r5
sld.w 4[ep],r1
dispose 8,{lp,ep}
RETI
#endif /* configUSE_PREEMPTION */
;------------------------------------------------------------------------------
COMMON INTVEC:CODE:ROOT(2)
ORG 544
`??MD_INTTM0EQ0??INTVEC 544`:
JR MD_INTTM0EQ0
RSEG NEAR_ID:CONST:SORT:NOROOT(2)
`?<Initializer for usCriticalNesting>`:
DW 10
COMMON INTVEC:CODE:ROOT(2)
ORG 40H
`??vPortYield??INTVEC 40`:
JR vPortYield
;------------------------------------------------------------------------------
; set microcontroller security ID
COMMON INTVEC:CODE:ROOT(2)
ORG 70H
`SECUID`:
DB CG_SECURITY0
DB CG_SECURITY1
DB CG_SECURITY2
DB CG_SECURITY3
DB CG_SECURITY4
DB CG_SECURITY5
DB CG_SECURITY6
DB CG_SECURITY7
DB CG_SECURITY8
DB CG_SECURITY9
; set microcontroller Option bytes
COMMON INTVEC:CODE:ROOT(2)
ORG 122
`OPTBYTES`:
DB 0xFD
DB 0xFF
DB 0xFF
DB 0xFF
DB 0xFF
DB 0xFF
#if configOCD_USAGE == 1
COMMON INTVEC:CODE:ROOT(4)
ORG 0x230
PUBLIC ROM_INT2
ROM_INT2:
DB 0xff, 0xff, 0xff, 0xff
DB 0xff, 0xff, 0xff, 0xff
DB 0xff, 0xff, 0xff, 0xff
DB 0xff, 0xff, 0xff, 0xff
COMMON INTVEC:CODE:ROOT(4)
ORG 0x60
PUBLIC ROM_INT
ROM_INT:
DB 0xff, 0xff, 0xff, 0xff
DB 0xff, 0xff, 0xff, 0xff
DB 0xff, 0xff, 0xff, 0xff
DB 0xff, 0xff, 0xff, 0xff
#endif /* configOCD_USAGE */
END
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