Re-sync with upstream and stripping away none kernel related.

portable/ThirdParty/CDK/T-HEAD_CK802/port.c

@@ -0,0 +1,150 @@
+/*
+ * Copyright (C) 2017 C-SKY Microsystems Co., Ltd. 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.
+ *
+ * 1 tab == 4 spaces!
+ */
+
+/* Kernel includes. */
+#include "FreeRTOS.h"
+#include "task.h"
+
+extern void vPortStartTask(void);
+
+/* Used to keep track of the number of nested calls to taskENTER_CRITICAL().  This
+will be set to 0 prior to the first task being started. */
+portLONG ulCriticalNesting = 0x9999UL;
+
+/* Used to record one tack want to swtich task after enter critical area, we need know it
+ * and implement task switch after exit critical area */
+portLONG pendsvflag = 0;
+
+StackType_t *pxPortInitialiseStack( StackType_t * pxTopOfStack, TaskFunction_t pxCode, void *pvParameters )
+{
+    StackType_t *stk  = NULL;
+
+    stk = pxTopOfStack;
+
+    *(--stk)  = (uint32_t)pxCode;            /* Entry Point                                         */
+    *(--stk)  = (uint32_t)0xE0000140L;       /* PSR                                                 */
+    *(--stk)  = (uint32_t)0xFFFFFFFEL;       /* R15 (LR) (init value will cause fault if ever used) */
+    *(--stk)  = (uint32_t)0x13131313L;       /* R13                                                 */
+    *(--stk)  = (uint32_t)0x12121212L;       /* R12                                                 */
+    *(--stk)  = (uint32_t)0x11111111L;       /* R11                                                 */
+    *(--stk)  = (uint32_t)0x10101010L;       /* R10                                                 */
+    *(--stk)  = (uint32_t)0x09090909L;       /* R9                                                  */
+    *(--stk)  = (uint32_t)0x08080808L;       /* R8                                                  */
+    *(--stk)  = (uint32_t)0x07070707L;       /* R7                                                  */
+    *(--stk)  = (uint32_t)0x06060606L;       /* R6                                                  */
+    *(--stk)  = (uint32_t)0x05050505L;       /* R5                                                  */
+    *(--stk)  = (uint32_t)0x04040404L;       /* R4                                                  */
+    *(--stk)  = (uint32_t)0x03030303L;       /* R3                                                  */
+    *(--stk)  = (uint32_t)0x02020202L;       /* R2                                                  */
+    *(--stk)  = (uint32_t)0x01010101L;       /* R1                                                  */
+    *(--stk)  = (uint32_t)pvParameters;      /* R0 : argument                                       */
+
+    return stk;
+}
+
+BaseType_t xPortStartScheduler( void )
+{
+    ulCriticalNesting = 0UL;
+
+    vPortStartTask();
+
+    return pdFALSE;
+}
+
+
+void vPortEndScheduler( void )
+{
+    /* Not implemented as there is nothing to return to. */
+}
+
+void vPortEnterCritical( void )
+{
+    portDISABLE_INTERRUPTS();
+    ulCriticalNesting ++;
+}
+
+void vPortExitCritical( void )
+{
+    if (ulCriticalNesting == 0) {
+        while(1);
+    }
+
+    ulCriticalNesting --;
+    if (ulCriticalNesting == 0)
+    {
+        portENABLE_INTERRUPTS();
+
+        if (pendsvflag)
+        {
+            pendsvflag = 0;
+            portYIELD();
+        }
+    }
+}
+
+#if configUSE_PREEMPTION == 0
+void xPortSysTickHandler( void )
+{
+    portLONG ulDummy;
+
+    ulDummy = portSET_INTERRUPT_MASK_FROM_ISR();
+    xTaskIncrementTick();
+    portCLEAR_INTERRUPT_MASK_FROM_ISR( ulDummy );
+}
+
+#else
+void xPortSysTickHandler( void )
+{
+    portLONG ulDummy;
+
+    ulDummy = portSET_INTERRUPT_MASK_FROM_ISR();
+    {
+        if (xTaskIncrementTick() != pdFALSE)
+        {
+            portYIELD_FROM_ISR(pdTRUE);
+        }
+    }
+    portCLEAR_INTERRUPT_MASK_FROM_ISR( ulDummy );
+}
+#endif
+
+void vPortYieldHandler( void )
+{
+    uint32_t ulSavedInterruptMask;
+
+    ulSavedInterruptMask = portSET_INTERRUPT_MASK_FROM_ISR();
+
+    vTaskSwitchContext();
+
+    portCLEAR_INTERRUPT_MASK_FROM_ISR( ulSavedInterruptMask );
+}
+
+__attribute__((weak)) void vApplicationStackOverflowHook( xTaskHandle *pxTask, signed portCHAR *pcTaskName )
+{
+    for(;;);
+}
+
+__attribute__((weak)) void vApplicationMallocFailedHook( void )
+{
+    for(;;);
+}