diff options
Diffstat (limited to 'FreeRTOS/Source/portable/ThirdParty/GCC/nrf52840-dk/port_cmsis.c')
| -rw-r--r-- | FreeRTOS/Source/portable/ThirdParty/GCC/nrf52840-dk/port_cmsis.c | 357 |
1 files changed, 0 insertions, 357 deletions
diff --git a/FreeRTOS/Source/portable/ThirdParty/GCC/nrf52840-dk/port_cmsis.c b/FreeRTOS/Source/portable/ThirdParty/GCC/nrf52840-dk/port_cmsis.c deleted file mode 100644 index b8dbc1b24..000000000 --- a/FreeRTOS/Source/portable/ThirdParty/GCC/nrf52840-dk/port_cmsis.c +++ /dev/null @@ -1,357 +0,0 @@ -/*
- * 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 CM4F port.
- *----------------------------------------------------------*/
-
-/* Scheduler includes. */
-#include "FreeRTOS.h"
-#include "task.h"
-#ifdef SOFTDEVICE_PRESENT
-#include "nrf_soc.h"
-#include "app_util.h"
-#include "app_util_platform.h"
-#endif
-
-#if !(__FPU_USED) && !(__LINT__)
- #error This port can only be used when the project options are configured to enable hardware floating point support.
-#endif
-
-#if configMAX_SYSCALL_INTERRUPT_PRIORITY == 0
- #error configMAX_SYSCALL_INTERRUPT_PRIORITY must not be set to 0. See http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html
-#endif
-
-/* Constants used to detect a Cortex-M7 r0p1 core, which should use the ARM_CM7
-r0p1 port. */
-#define portCORTEX_M4_r0p1_ID ( 0x410FC241UL )
-
-/* 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;
-
-/*
- * 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 );
-
-/*
- * Function to enable the VFP.
- */
-static void vPortEnableVFP( void );
-
-/*
- * Used to catch tasks that attempt to return from their implementing function.
- */
-static void prvTaskExitError( void );
-
-/*-----------------------------------------------------------*/
-
-/*
- * Used by the portASSERT_IF_INTERRUPT_PRIORITY_INVALID() macro to ensure
- * FreeRTOS API functions are not called from interrupts that have been assigned
- * a priority above configMAX_SYSCALL_INTERRUPT_PRIORITY.
- */
-#if ( configASSERT_DEFINED == 1 )
- static uint8_t ucMaxSysCallPriority = 0;
- static uint32_t ulMaxPRIGROUPValue = 0;
-#endif /* configASSERT_DEFINED */
-
-/*-----------------------------------------------------------*/
-
-/*
- * 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 */
-
- /* A save method is being used that requires each task to maintain its
- own exec return value. */
- pxTopOfStack--;
- *pxTopOfStack = portINITIAL_EXEC_RETURN;
-
- 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 )
-{
- /* configMAX_SYSCALL_INTERRUPT_PRIORITY must not be set to 0.
- See http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html */
- configASSERT( configMAX_SYSCALL_INTERRUPT_PRIORITY );
-
- /* This port is designed for nRF52, this is Cortex-M4 r0p1. */
- configASSERT( SCB->CPUID == portCORTEX_M4_r0p1_ID );
-
- #if ( configASSERT_DEFINED == 1 )
- {
- volatile uint32_t ulOriginalPriority;
- volatile uint8_t * const pucFirstUserPriorityRegister = &NVIC->IP[0];
- volatile uint8_t ucMaxPriorityValue;
-
- /* Determine the maximum priority from which ISR safe FreeRTOS API
- functions can be called. ISR safe functions are those that end in
- "FromISR". FreeRTOS maintains separate thread and ISR API functions to
- ensure interrupt entry is as fast and simple as possible.
-
- Save the interrupt priority value that is about to be clobbered. */
- ulOriginalPriority = *pucFirstUserPriorityRegister;
-
- /* Determine the number of priority bits available. First write to all
- possible bits. */
- *pucFirstUserPriorityRegister = portMAX_8_BIT_VALUE;
-
- /* Read the value back to see how many bits stuck. */
- ucMaxPriorityValue = *pucFirstUserPriorityRegister;
-
- /* Use the same mask on the maximum system call priority. */
- ucMaxSysCallPriority = configMAX_SYSCALL_INTERRUPT_PRIORITY & ucMaxPriorityValue;
-
- /* Calculate the maximum acceptable priority group value for the number
- of bits read back. */
- ulMaxPRIGROUPValue = SCB_AIRCR_PRIGROUP_Msk >> SCB_AIRCR_PRIGROUP_Pos;
- while ( ( ucMaxPriorityValue & portTOP_BIT_OF_BYTE ) == portTOP_BIT_OF_BYTE )
- {
- ulMaxPRIGROUPValue--;
- ucMaxPriorityValue <<= ( uint8_t ) 0x01;
- }
-
- /* Remove any bits that are more than actually existing. */
- ulMaxPRIGROUPValue &= SCB_AIRCR_PRIGROUP_Msk >> SCB_AIRCR_PRIGROUP_Pos;
-
- /* Restore the clobbered interrupt priority register to its original
- value. */
- *pucFirstUserPriorityRegister = ulOriginalPriority;
- }
- #endif /* conifgASSERT_DEFINED */
-
- /* 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;
-
- /* Ensure the VFP is enabled - it should be anyway. */
- vPortEnableVFP();
-
- /* Lazy save always. */
- FPU->FPCCR |= FPU_FPCCR_ASPEN_Msk | FPU_FPCCR_LSPEN_Msk;
-
- /* 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 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();
- }
-}
-
-/*-----------------------------------------------------------*/
-
-/* This is a naked function. */
-static void vPortEnableVFP( void )
-{
- SCB->CPACR |= 0xf << 20;
-}
-/*-----------------------------------------------------------*/
-
-#if ( configASSERT_DEFINED == 1 )
-
- void vPortValidateInterruptPriority( void )
- {
- uint32_t ulCurrentInterrupt;
- uint8_t ucCurrentPriority;
- IPSR_Type ipsr;
-
- /* Obtain the number of the currently executing interrupt. */
- ipsr.w = __get_IPSR();
- ulCurrentInterrupt = ipsr.b.ISR;
-
- /* Is the interrupt number a user defined interrupt? */
- if ( ulCurrentInterrupt >= portFIRST_USER_INTERRUPT_NUMBER )
- {
- /* Look up the interrupt's priority. */
- ucCurrentPriority = NVIC->IP[ ulCurrentInterrupt - portFIRST_USER_INTERRUPT_NUMBER ];
-
- /* The following assertion will fail if a service routine (ISR) for
- an interrupt that has been assigned a priority above
- configMAX_SYSCALL_INTERRUPT_PRIORITY calls an ISR safe FreeRTOS API
- function. ISR safe FreeRTOS API functions must *only* be called
- from interrupts that have been assigned a priority at or below
- configMAX_SYSCALL_INTERRUPT_PRIORITY.
-
- Numerically low interrupt priority numbers represent logically high
- interrupt priorities, therefore the priority of the interrupt must
- be set to a value equal to or numerically *higher* than
- configMAX_SYSCALL_INTERRUPT_PRIORITY.
-
- Interrupts that use the FreeRTOS API must not be left at their
- default priority of zero as that is the highest possible priority,
- which is guaranteed to be above configMAX_SYSCALL_INTERRUPT_PRIORITY,
- and therefore also guaranteed to be invalid.
-
- FreeRTOS maintains separate thread and ISR API functions to ensure
- interrupt entry is as fast and simple as possible.
-
- The following links provide detailed information:
- http://www.freertos.org/RTOS-Cortex-M3-M4.html
- http://www.freertos.org/FAQHelp.html */
- configASSERT( ucCurrentPriority >= ucMaxSysCallPriority );
- }
-
- /* Priority grouping: The interrupt controller (NVIC) allows the bits
- that define each interrupt's priority to be split between bits that
- define the interrupt's pre-emption priority bits and bits that define
- the interrupt's sub-priority. For simplicity all bits must be defined
- to be pre-emption priority bits. The following assertion will fail if
- this is not the case (if some bits represent a sub-priority).
-
- If the application only uses CMSIS libraries for interrupt
- configuration then the correct setting can be achieved on all Cortex-M
- devices by calling NVIC_SetPriorityGrouping( 0 ); before starting the
- scheduler. Note however that some vendor specific peripheral libraries
- assume a non-zero priority group setting, in which cases using a value
- of zero will result in unpredicable behaviour. */
- configASSERT( NVIC_GetPriorityGrouping() <= ulMaxPRIGROUPValue );
- }
-
-#endif /* configASSERT_DEFINED */
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