1 files changed, 243 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/freertos/portable/CMSIS/nrf51/port_cmsis.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/freertos/portable/CMSIS/nrf51/port_cmsis.c
new file mode 100644
index 0000000..d6d209f
--- /dev/null
+++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/freertos/portable/CMSIS/nrf51/port_cmsis.c
@@ -0,0 +1,243 @@
+/*
+ * FreeRTOS Kernel V10.0.0
+ * Copyright (C) 2017 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. If you wish to use our Amazon
+ * FreeRTOS name, please do so in a fair use way that does not cause confusion.
+ *
+ * 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!
+ */
+
+/*-----------------------------------------------------------
+ * Implementation of functions defined in portable.h for the ARM CM0 port.
+ *----------------------------------------------------------*/
+
+/* Scheduler includes. */
+#include "FreeRTOS.h"
+#include "task.h"
+#ifdef SOFTDEVICE_PRESENT
+#include "nrf_soc.h"
+#endif
+
+/* Make sure that all elements in isr state fits in uint32_t element*/
+#include "portmacro_cmsis.h"
+STATIC_ASSERT(sizeof(portISRState_t) == sizeof(uint32_t));
+
+/* Constants used for assertion check of the selected CPU */
+#define portCORTEX_M0_r0p0_ID               ( 0x410CC200UL )
+
+/* Constants required to check the validity of an interrupt priority. */
+#define portFIRST_USER_INTERRUPT_NUMBER     ( 16 )
+#define portMAX_8_BIT_VALUE                 ( ( uint8_t ) 0xff )
+#define portTOP_BIT_OF_BYTE                 ( ( uint8_t ) 0x80 )
+
+/* Constants required to set up the initial stack. */
+#define portINITIAL_XPSR                    (((xPSR_Type){.b.T = 1}).w)
+#define portINITIAL_EXEC_RETURN             ( 0xfffffffd )
+
+/* Let the user override the pre-loading of the initial LR with the address of
+prvTaskExitError() in case is messes up unwinding of the stack in the
+debugger. */
+#ifdef configTASK_RETURN_ADDRESS
+    #define portTASK_RETURN_ADDRESS configTASK_RETURN_ADDRESS
+#else
+    #define portTASK_RETURN_ADDRESS prvTaskExitError
+#endif
+
+/* Each task maintains its own interrupt status in the critical nesting
+variable. */
+static UBaseType_t uxCriticalNesting = 0;
+
+#ifdef SOFTDEVICE_PRESENT
+/* Flag that is set when yielding should be done after critical section exiting */
+static UBaseType_t uxYieldFlag = 0;
+#endif
+
+/*
+ * Setup the timer to generate the tick interrupts.  The implementation in this
+ * file is weak to allow application writers to change the timer used to
+ * generate the tick interrupt.
+ */
+extern void vPortSetupTimerInterrupt( void );
+
+/*
+ * Exception handlers.
+ */
+void xPortSysTickHandler( void );
+
+/*
+ * Start first task is a separate function so it can be tested in isolation.
+ */
+extern void vPortStartFirstTask( void );
+
+/*
+ * Used to catch tasks that attempt to return from their implementing function.
+ */
+static void prvTaskExitError( void );
+
+
+/*-----------------------------------------------------------*/
+
+/*
+ * See header file for description.
+ */
+StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters )
+{
+    /* Simulate the stack frame as it would be created by a context switch
+    interrupt. */
+
+    /* Offset added to account for the way the MCU uses the stack on entry/exit
+    of interrupts, and to ensure alignment. */
+    pxTopOfStack--;
+
+    *pxTopOfStack = portINITIAL_XPSR;   /* xPSR */
+    pxTopOfStack--;
+    *pxTopOfStack = ( StackType_t ) pxCode; /* PC */
+    pxTopOfStack--;
+    *pxTopOfStack = ( StackType_t ) portTASK_RETURN_ADDRESS;    /* LR */
+
+    /* Save code space by skipping register initialisation. */
+    pxTopOfStack -= 5;  /* R12, R3, R2 and R1. */
+    *pxTopOfStack = ( StackType_t ) pvParameters;   /* R0 */
+
+    pxTopOfStack -= 8;  /* R11, R10, R9, R8, R7, R6, R5 and R4. */
+
+    return pxTopOfStack;
+}
+/*-----------------------------------------------------------*/
+
+static void prvTaskExitError( void )
+{
+    /* A function that implements a task must not exit or attempt to return to
+    its caller as there is nothing to return to.  If a task wants to exit it
+    should instead call vTaskDelete( NULL ).
+
+    Artificially force an assert() to be triggered if configASSERT() is
+    defined, then stop here so application writers can catch the error. */
+    configASSERT( uxCriticalNesting == ~0UL );
+    portDISABLE_INTERRUPTS();
+    for ( ;; );
+}
+
+
+/*-----------------------------------------------------------*/
+
+/*
+ * See header file for description.
+ */
+BaseType_t xPortStartScheduler( void )
+{
+    /* This port can be used only on Cortex-M0 processor */
+    configASSERT( SCB->CPUID == portCORTEX_M0_r0p0_ID );
+
+    /* Make PendSV the lowest priority interrupts. */
+    NVIC_SetPriority(PendSV_IRQn, configKERNEL_INTERRUPT_PRIORITY);
+
+    /* Start the timer that generates the tick ISR.  Interrupts are disabled
+    here already. */
+    vPortSetupTimerInterrupt();
+
+    /* Initialise the critical nesting count ready for the first task. */
+    uxCriticalNesting = 0;
+
+    /* Finally this port requires SEVONPEND to be active */
+    SCB->SCR |= SCB_SCR_SEVONPEND_Msk;
+
+    /* Start the first task. */
+    vPortStartFirstTask();
+
+    /* Should never get here as the tasks will now be executing!  Call the task
+    exit error function to prevent compiler warnings about a static function
+    not being called in the case that the application writer overrides this
+    functionality by defining configTASK_RETURN_ADDRESS. */
+    prvTaskExitError();
+
+    /* Should not get here! */
+    return 0;
+}
+/*-----------------------------------------------------------*/
+
+void vPortEndScheduler( void )
+{
+    /* Not implemented in ports where there is nothing to return to.
+    Artificially force an assert. */
+    configASSERT( uxCriticalNesting == 1000UL );
+}
+/*-----------------------------------------------------------*/
+
+void vPortTaskYield( void )
+{
+#ifdef SOFTDEVICE_PRESENT
+    if (uxCriticalNesting > 0)
+    {
+        uxYieldFlag = 1;
+    }
+    else
+    {
+        portPendSVSchedule();
+    }
+#else
+    portPendSVSchedule();
+#endif
+}
+/*-----------------------------------------------------------*/
+
+void vPortEnterCritical( void )
+{
+    portDISABLE_INTERRUPTS();
+    uxCriticalNesting++;
+
+    /* This is not the interrupt safe version of the enter critical function so
+    assert() if it is being called from an interrupt context.  Only API
+    functions that end in "FromISR" can be used in an interrupt.  Only assert if
+    the critical nesting count is 1 to protect against recursive calls if the
+    assert function also uses a critical section. */
+    if ( uxCriticalNesting == 1 )
+    {
+        configASSERT( ( SCB->ICSR & SCB_ICSR_VECTACTIVE_Msk ) == 0 );
+    }
+}
+/*-----------------------------------------------------------*/
+
+void vPortExitCritical( void )
+{
+    configASSERT( uxCriticalNesting );
+    uxCriticalNesting--;
+    if ( uxCriticalNesting == 0 )
+    {
+        portENABLE_INTERRUPTS();
+#ifdef SOFTDEVICE_PRESENT
+        if (uxYieldFlag)
+        {
+            uxYieldFlag = 0;
+            portPendSVSchedule();
+        }
+#endif
+    }
+}
+/*-----------------------------------------------------------*/
+
+void vPortSafeTaskSwitchContext( void )
+{
+    uint32_t isrstate = portSET_INTERRUPT_MASK_FROM_ISR();
+    vTaskSwitchContext();
+    portCLEAR_INTERRUPT_MASK_FROM_ISR(isrstate);
+}