/*
 * FreeRTOS Kernel V10.3.0
 * 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!
 */

/* Scheduler include files. */
#include "FreeRTOS.h"
#include "task.h"

/* Demo file headers. */
#include "regtest.h"

/*
 * Test tasks that sets registers to known values, then checks to ensure the
 * values remain as expected.  Test 1 and test 2 use different values.
 */
static void prvRegisterCheck1( void *pvParameters );
static void prvRegisterCheck2( void *pvParameters );

/* Set to a non zero value should an error be found. */
portBASE_TYPE xRegTestError = pdFALSE;

/*-----------------------------------------------------------*/

void vStartRegTestTasks( void )
{
	xTaskCreate( prvRegisterCheck1, "Reg1", configMINIMAL_STACK_SIZE, NULL, tskIDLE_PRIORITY, NULL );
	xTaskCreate( prvRegisterCheck2, "Reg2", configMINIMAL_STACK_SIZE, NULL, tskIDLE_PRIORITY, NULL );		
}
/*-----------------------------------------------------------*/

portBASE_TYPE xAreRegTestTasksStillRunning( void )
{
portBASE_TYPE xReturn;

	/* If a register was found to contain an unexpected value then the
	xRegTestError variable would have been set to a non zero value. */
	if( xRegTestError == pdFALSE )
	{
		xReturn = pdTRUE;
	}
	else
	{
		xReturn = pdFALSE;
	}
	
	return xReturn;
}
/*-----------------------------------------------------------*/

static void prvRegisterCheck1( void *pvParameters )
{
	( void ) pvParameters;

	for( ;; )
	{
		asm(	"LDI	r31,	5"		);		
		asm( 	"MOV	r0,		r31"	);
		asm(	"LDI	r31,	6"		);
		asm( 	"MOV	r1,		r31"	);
		asm(	"LDI	r31,	7"		);
		asm( 	"MOV	r2,		r31"	);
		asm(	"LDI	r31,	8"		);
		asm( 	"MOV	r3,		r31"	);
		asm(	"LDI	r31,	9"		);
		asm( 	"MOV	r4,		r31"	);
		asm(	"LDI	r31,	10"		);
		asm( 	"MOV	r5,		r31"	);
		asm(	"LDI	r31,	11"		);
		asm( 	"MOV	r6,		r31"	);
		asm(	"LDI	r31,	12"		);
		asm( 	"MOV	r7,		r31"	);
		asm(	"LDI	r31,	13"		);
		asm( 	"MOV	r8,		r31"	);
		asm(	"LDI	r31,	14"		);
		asm( 	"MOV	r9,		r31"	);
		asm(	"LDI	r31,	15"		);
		asm( 	"MOV	r10,	r31"	);
		asm(	"LDI	r31,	16"		);
		asm( 	"MOV	r11,	r31"	);
		asm(	"LDI	r31,	17"		);
		asm( 	"MOV	r12,	r31"	);
		asm(	"LDI	r31,	18"		);
		asm( 	"MOV	r13,	r31"	);
		asm(	"LDI	r31,	19"		);
		asm( 	"MOV	r14,	r31"	);
		asm(	"LDI	r31,	20"		);
		asm( 	"MOV	r15,	r31"	);
		asm(	"LDI	r16,	21"		);
		asm(	"LDI	r17,	22"		);
		asm(	"LDI	r18,	23"		);
		asm(	"LDI	r19,	24"		);
		asm(	"LDI	r20,	25"		);
		asm(	"LDI	r21,	26"		);
		asm(	"LDI	r22,	27"		);
		asm(	"LDI	r23,	28"		);
		asm(	"LDI	r24,	29"		);
		asm(	"LDI	r25,	30"		);
		asm(	"LDI	r26,	31"		);
		asm(	"LDI	r27,	32"		);
		asm(	"LDI	r30,	33"		);

		asm(	"LDI	r31,	5"			);
		asm(	"CPSE	r31,	r0"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	6"			);
		asm(	"CPSE	r31,	r1"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	7"			);
		asm(	"CPSE	r31,	r2"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	8"			);
		asm(	"CPSE	r31,	r3"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	9"			);
		asm(	"CPSE	r31,	r4"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	10"			);
		asm(	"CPSE	r31,	r5"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	11"			);
		asm(	"CPSE	r31,	r6"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	12"			);
		asm(	"CPSE	r31,	r7"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	13"			);
		asm(	"CPSE	r31,	r8"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	14"			);
		asm(	"CPSE	r31,	r9"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	15"			);
		asm(	"CPSE	r31,	r10"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	16"			);
		asm(	"CPSE	r31,	r11"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	17"			);
		asm(	"CPSE	r31,	r12"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	18"			);
		asm(	"CPSE	r31,	r13"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	19"			);
		asm(	"CPSE	r31,	r14"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	20"			);
		asm(	"CPSE	r31,	r15"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	21"			);
		asm(	"CPSE	r31,	r16"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	22"			);
		asm(	"CPSE	r31,	r17"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	23"			);
		asm(	"CPSE	r31,	r18"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	24"			);
		asm(	"CPSE	r31,	r19"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	25"			);
		asm(	"CPSE	r31,	r20"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	26"			);
		asm(	"CPSE	r31,	r21"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	27"			);
		asm(	"CPSE	r31,	r22"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	28"			);
		asm(	"CPSE	r31,	r23"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	29"			);
		asm(	"CPSE	r31,	r24"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	30"			);
		asm(	"CPSE	r31,	r25"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	31"			);
		asm(	"CPSE	r31,	r26"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	32"			);
		asm(	"CPSE	r31,	r27"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	33"			);
		asm(	"CPSE	r31,	r30"		);
		asm(	"STS	xRegTestError, r0"	);
	}
}
/*-----------------------------------------------------------*/

static void prvRegisterCheck2( void *pvParameters )
{
	( void ) pvParameters;

	for( ;; )
	{
		asm(	"LDI	r31,	1"		);		
		asm( 	"MOV	r0,		r31"	);
		asm(	"LDI	r31,	2"		);
		asm( 	"MOV	r1,		r31"	);
		asm(	"LDI	r31,	3"		);
		asm( 	"MOV	r2,		r31"	);
		asm(	"LDI	r31,	4"		);
		asm( 	"MOV	r3,		r31"	);
		asm(	"LDI	r31,	5"		);
		asm( 	"MOV	r4,		r31"	);
		asm(	"LDI	r31,	6"		);
		asm( 	"MOV	r5,		r31"	);
		asm(	"LDI	r31,	7"		);
		asm( 	"MOV	r6,		r31"	);
		asm(	"LDI	r31,	8"		);
		asm( 	"MOV	r7,		r31"	);
		asm(	"LDI	r31,	9"		);
		asm( 	"MOV	r8,		r31"	);
		asm(	"LDI	r31,	10"		);
		asm( 	"MOV	r9,		r31"	);
		asm(	"LDI	r31,	11"		);
		asm( 	"MOV	r10,	r31"	);
		asm(	"LDI	r31,	12"		);
		asm( 	"MOV	r11,	r31"	);
		asm(	"LDI	r31,	13"		);
		asm( 	"MOV	r12,	r31"	);
		asm(	"LDI	r31,	14"		);
		asm( 	"MOV	r13,	r31"	);
		asm(	"LDI	r31,	15"		);
		asm( 	"MOV	r14,	r31"	);
		asm(	"LDI	r31,	16"		);
		asm( 	"MOV	r15,	r31"	);
		asm(	"LDI	r16,	17"		);
		asm(	"LDI	r17,	18"		);
		asm(	"LDI	r18,	19"		);
		asm(	"LDI	r19,	20"		);
		asm(	"LDI	r20,	21"		);
		asm(	"LDI	r21,	22"		);
		asm(	"LDI	r22,	23"		);
		asm(	"LDI	r23,	24"		);
		asm(	"LDI	r24,	25"		);
		asm(	"LDI	r25,	26"		);
		asm(	"LDI	r26,	27"		);
		asm(	"LDI	r27,	28"		);
		asm(	"LDI	r30,	29"		);

		asm(	"LDI	r31,	1"			);
		asm(	"CPSE	r31,	r0"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	2"			);
		asm(	"CPSE	r31,	r1"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	3"			);
		asm(	"CPSE	r31,	r2"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	4"			);
		asm(	"CPSE	r31,	r3"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	5"			);
		asm(	"CPSE	r31,	r4"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	6"			);
		asm(	"CPSE	r31,	r5"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	7"			);
		asm(	"CPSE	r31,	r6"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	8"			);
		asm(	"CPSE	r31,	r7"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	9"			);
		asm(	"CPSE	r31,	r8"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	10"			);
		asm(	"CPSE	r31,	r9"			);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	11"			);
		asm(	"CPSE	r31,	r10"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	12"			);
		asm(	"CPSE	r31,	r11"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	13"			);
		asm(	"CPSE	r31,	r12"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	14"			);
		asm(	"CPSE	r31,	r13"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	15"			);
		asm(	"CPSE	r31,	r14"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	16"			);
		asm(	"CPSE	r31,	r15"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	17"			);
		asm(	"CPSE	r31,	r16"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	18"			);
		asm(	"CPSE	r31,	r17"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	19"			);
		asm(	"CPSE	r31,	r18"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	20"			);
		asm(	"CPSE	r31,	r19"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	21"			);
		asm(	"CPSE	r31,	r20"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	22"			);
		asm(	"CPSE	r31,	r21"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	23"			);
		asm(	"CPSE	r31,	r22"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	24"			);
		asm(	"CPSE	r31,	r23"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	25"			);
		asm(	"CPSE	r31,	r24"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	26"			);
		asm(	"CPSE	r31,	r25"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	27"			);
		asm(	"CPSE	r31,	r26"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	28"			);
		asm(	"CPSE	r31,	r27"		);
		asm(	"STS	xRegTestError, r0"	);
		asm(	"LDI	r31,	29"			);
		asm(	"CPSE	r31,	r30"		);
		asm(	"STS	xRegTestError, r0"	);
	}
}