[修改] 增加freeRTOS

1. 版本FreeRTOSv202212.01，命名为kernel；

kernel/FreeRTOS/Demo/RISC-V-Qemu-sifive_e-Eclipse-GCC/FreeRTOSConfig.h

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+/*
+ * FreeRTOS V202212.01
+ * 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.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+#ifndef FREERTOS_CONFIG_H
+#define FREERTOS_CONFIG_H
+
+#include "platform.h"
+
+/*
+ * For some reason the standard demo timer demo/test tasks fail when executing
+ * in QEMU, although they pass on other RISC-V platforms.  This requires
+ * further investigation, but for now, defining _WINDOWS_ has the effect of
+ * using the wider timer test thresholds that are normally only used when the
+ * tests are used with the FreeRTOS Windows port (which is not deterministic
+ * and therefore requires wider margins).
+ */
+#define _WINDOWS_
+
+/*-----------------------------------------------------------
+ * Application specific definitions.
+ *
+ * These definitions should be adjusted for your particular hardware and
+ * application requirements.
+ *
+ * THESE PARAMETERS ARE DESCRIBED WITHIN THE 'CONFIGURATION' SECTION OF THE
+ * FreeRTOS API DOCUMENTATION AVAILABLE ON THE FreeRTOS.org WEB SITE.
+ *
+ * See http://www.freertos.org/a00110.html.
+ *----------------------------------------------------------*/
+
+/* See https://www.freertos.org/Using-FreeRTOS-on-RISC-V.html */
+#define configMTIME_BASE_ADDRESS 	( ( CLINT_CTRL_ADDR ) + 0xBFF8UL )
+#define configMTIMECMP_BASE_ADDRESS ( ( CLINT_CTRL_ADDR ) + 0x4000UL )
+
+#define configUSE_PREEMPTION			1
+#define configUSE_IDLE_HOOK				0
+#define configUSE_TICK_HOOK				1
+#define configCPU_CLOCK_HZ				( 1000000 )
+#define configTICK_RATE_HZ				( ( TickType_t ) 1000 )
+#define configMAX_PRIORITIES			( 7 )
+#define configMINIMAL_STACK_SIZE		( ( unsigned short ) 105 )
+#define configTOTAL_HEAP_SIZE			( ( size_t ) 14500 )
+#define configMAX_TASK_NAME_LEN			( 16 )
+#define configUSE_TRACE_FACILITY		0
+#define configUSE_16_BIT_TICKS			0
+#define configIDLE_SHOULD_YIELD			0
+#define configUSE_MUTEXES				1
+#define configQUEUE_REGISTRY_SIZE		8
+#define configCHECK_FOR_STACK_OVERFLOW	2
+#define configUSE_RECURSIVE_MUTEXES		1
+#define configUSE_MALLOC_FAILED_HOOK	1
+#define configUSE_APPLICATION_TASK_TAG	0
+#define configUSE_COUNTING_SEMAPHORES	1
+#define configGENERATE_RUN_TIME_STATS	0
+#define configUSE_PORT_OPTIMISED_TASK_SELECTION 1
+
+
+/* Software timer definitions. */
+#define configUSE_TIMERS				1
+#define configTIMER_TASK_PRIORITY		( configMAX_PRIORITIES - 1 )
+#define configTIMER_QUEUE_LENGTH		6
+#define configTIMER_TASK_STACK_DEPTH	( 110 )
+
+/* Task priorities.  Allow these to be overridden. */
+#ifndef uartPRIMARY_PRIORITY
+	#define uartPRIMARY_PRIORITY		( configMAX_PRIORITIES - 3 )
+#endif
+
+/* Set the following definitions to 1 to include the API function, or zero
+to exclude the API function. */
+#define INCLUDE_vTaskPrioritySet		1
+#define INCLUDE_uxTaskPriorityGet		1
+#define INCLUDE_vTaskDelete				1
+#define INCLUDE_vTaskCleanUpResources	1
+#define INCLUDE_vTaskSuspend			1
+#define INCLUDE_vTaskDelayUntil			1
+#define INCLUDE_vTaskDelay				1
+#define INCLUDE_eTaskGetState			1
+#define INCLUDE_xTimerPendFunctionCall	1
+#define INCLUDE_xTaskAbortDelay				1
+#define INCLUDE_xTaskGetHandle				1
+#define INCLUDE_xSemaphoreGetMutexHolder	1
+
+/* Normal assert() semantics without relying on the provision of an assert.h
+header file. */
+void vAssertCalled( void );
+#define configASSERT( x ) if( ( x ) == 0 ) vAssertCalled()
+
+/* Overwrite some of the stack sizes allocated to various test and demo tasks.
+Like all task stack sizes, the value is the number of words, not bytes. */
+#define bktBLOCK_TIME_TASK_STACK_SIZE 100
+#define notifyNOTIFIED_TASK_STACK_SIZE 110
+#define priSUSPENDED_RX_TASK_STACK_SIZE 90
+#define tmrTIMER_TEST_TASK_STACK_SIZE 100
+#define ebRENDESVOUS_TEST_TASK_STACK_SIZE 100
+#define ebEVENT_GROUP_SET_BITS_TEST_TASK_STACK_SIZE 115
+#define genqMUTEX_TEST_TASK_STACK_SIZE 90
+#define recmuRECURSIVE_MUTEX_TEST_TASK_STACK_SIZE 110
+
+#endif /* FREERTOS_CONFIG_H */