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;/*
; * FreeRTOS V202107.00
; * Copyright (C) 2020 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.
; *
; * http://www.FreeRTOS.org
; * http://aws.amazon.com/freertos
; *
; * 1 tab == 4 spaces!
; */
;
; This file defines the RegTest tasks as described at the top of main.c
;
;------------------------------------------------------------------------------
; Functions implemented in this file
;------------------------------------------------------------------------------
PUBLIC vRegTest1Task
PUBLIC vRegTest2Task
; Functions and variables used by this file
;------------------------------------------------------------------------------
EXTERN vRegTestError
EXTERN usRegTest1LoopCounter
EXTERN usRegTest2LoopCounter
;------------------------------------------------------------------------------
; Fill all the registers with known values, then check that the registers
; contain the expected value. An incorrect value being indicative of an
; error in the context switch mechanism.
;
; Input: NONE
;
; Call: Created as a task.
;
; Output: NONE
;
;------------------------------------------------------------------------------
RSEG CODE:CODE
vRegTest1Task:
; First fill the registers.
MOVW AX, #0x1122
MOVW BC, #0x3344
MOVW DE, #0x5566
MOVW HL, #0x7788
MOV CS, #0x01
#if __DATA_MODEL__ == __DATA_MODEL_FAR__
; ES is not saved or restored when using the near memory model so only
; test it when using the far model.
MOV ES, #0x02
#endif
loop1:
; Continuously check that the register values remain at their expected
; values. The BRK is to test the yield. This task runs at low priority
; so will also regularly get preempted.
BRK
; Compare with the expected value.
CMPW AX, #0x1122
SKZ
; Jump over the branch to vRegTestError() if the register contained the
; expected value - otherwise flag an error by executing vRegTestError().
BR vRegTestError
; Repeat for all the registers.
MOVW AX, BC
CMPW AX, #0x3344
SKZ
BR vRegTestError
MOVW AX, DE
CMPW AX, #0x5566
SKZ
BR vRegTestError
MOVW AX, HL
CMPW AX, #0x7788
SKZ
BR vRegTestError
MOV A, CS
CMP A, #0x01
SKZ
BR vRegTestError
#if __DATA_MODEL__ == __DATA_MODEL_FAR__
; ES is not saved or restored when using the near memory model so only
; test it when using the far model.
MOV A, ES
CMP A, #0x02
SKZ
BR vRegTestError
#endif
; Indicate that this task is still cycling.
INCW usRegTest1LoopCounter
MOVW AX, #0x1122
BR loop1
;------------------------------------------------------------------------------
; Fill all the registers with known values, then check that the registers
; contain the expected value. An incorrect value being indicative of an
; error in the context switch mechanism.
;
; Input: NONE
;
; Call: Created as a task.
;
; Output: NONE
;
;------------------------------------------------------------------------------
RSEG CODE:CODE
vRegTest2Task:
MOVW AX, #0x99aa
MOVW BC, #0xbbcc
MOVW DE, #0xddee
MOVW HL, #0xff12
MOV CS, #0x03
#if __DATA_MODEL__ == __DATA_MODEL_FAR__
MOV ES, #0x04
#endif
loop2:
CMPW AX, #0x99aa
SKZ
BR vRegTestError
MOVW AX, BC
CMPW AX, #0xbbcc
SKZ
BR vRegTestError
MOVW AX, DE
CMPW AX, #0xddee
SKZ
BR vRegTestError
MOVW AX, HL
CMPW AX, #0xff12
SKZ
BR vRegTestError
MOV A, CS
CMP A, #0x03
SKZ
BR vRegTestError
#if __DATA_MODEL__ == __DATA_MODEL_FAR__
MOV A, ES
CMP A, #0x04
SKZ
BR vRegTestError
#endif
; Indicate that this task is still cycling.
INCW usRegTest2LoopCounter
MOVW AX, #0x99aa
BR loop2
END
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