From 2b1ba741d5c813df07feb2c37aab7cb2c5c4f947 Mon Sep 17 00:00:00 2001 From: Christian Pointner Date: Sun, 4 Aug 2013 22:54:56 +0000 Subject: remove old FreeRTOS based MPU files git-svn-id: https://svn.spreadspace.org/mur.sat@824 7de4ea59-55d0-425e-a1af-a3118ea81d4c --- contrib/FreeRTOS_Library/portable/port.c | 281 ------------------------------- 1 file changed, 281 deletions(-) delete mode 100644 contrib/FreeRTOS_Library/portable/port.c (limited to 'contrib/FreeRTOS_Library/portable/port.c') diff --git a/contrib/FreeRTOS_Library/portable/port.c b/contrib/FreeRTOS_Library/portable/port.c deleted file mode 100644 index 6f35e6d..0000000 --- a/contrib/FreeRTOS_Library/portable/port.c +++ /dev/null @@ -1,281 +0,0 @@ -/* - FreeRTOS V6.1.0 - Copyright (C) 2010 Real Time Engineers Ltd. - - *************************************************************************** - * * - * If you are: * - * * - * + New to FreeRTOS, * - * + Wanting to learn FreeRTOS or multitasking in general quickly * - * + Looking for basic training, * - * + Wanting to improve your FreeRTOS skills and productivity * - * * - * then take a look at the FreeRTOS books - available as PDF or paperback * - * * - * "Using the FreeRTOS Real Time Kernel - a Practical Guide" * - * http://www.FreeRTOS.org/Documentation * - * * - * A pdf reference manual is also available. Both are usually delivered * - * to your inbox within 20 minutes to two hours when purchased between 8am * - * and 8pm GMT (although please allow up to 24 hours in case of * - * exceptional circumstances). Thank you for your support! * - * * - *************************************************************************** - - This file is part of the FreeRTOS distribution. - - FreeRTOS is free software; you can redistribute it and/or modify it under - the terms of the GNU General Public License (version 2) as published by the - Free Software Foundation AND MODIFIED BY the FreeRTOS exception. - ***NOTE*** The exception to the GPL is included to allow you to distribute - a combined work that includes FreeRTOS without being obliged to provide the - source code for proprietary components outside of the FreeRTOS kernel. - FreeRTOS is distributed in the hope that it will be useful, but WITHOUT - ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - more details. You should have received a copy of the GNU General Public - License and the FreeRTOS license exception along with FreeRTOS; if not it - can be viewed here: http://www.freertos.org/a00114.html and also obtained - by writing to Richard Barry, contact details for whom are available on the - FreeRTOS WEB site. - - 1 tab == 4 spaces! - - http://www.FreeRTOS.org - Documentation, latest information, license and - contact details. - - http://www.SafeRTOS.com - A version that is certified for use in safety - critical systems. - - http://www.OpenRTOS.com - Commercial support, development, porting, - licensing and training services. -*/ - -/*----------------------------------------------------------- - * Implementation of functions defined in portable.h for the ARM CM3 port. - *----------------------------------------------------------*/ - -/* Scheduler includes. */ -#include "FreeRTOS.h" -#include "task.h" - -/* For backward compatibility, ensure configKERNEL_INTERRUPT_PRIORITY is -defined. The value should also ensure backward compatibility. -FreeRTOS.org versions prior to V4.4.0 did not include this definition. */ -#ifndef configKERNEL_INTERRUPT_PRIORITY - #define configKERNEL_INTERRUPT_PRIORITY 255 -#endif - -/* Constants required to manipulate the NVIC. */ -#define portNVIC_SYSTICK_CTRL ( ( volatile unsigned long *) 0xe000e010 ) -#define portNVIC_SYSTICK_LOAD ( ( volatile unsigned long *) 0xe000e014 ) -#define portNVIC_INT_CTRL ( ( volatile unsigned long *) 0xe000ed04 ) -#define portNVIC_SYSPRI2 ( ( volatile unsigned long *) 0xe000ed20 ) -#define portNVIC_SYSTICK_CLK 0x00000004 -#define portNVIC_SYSTICK_INT 0x00000002 -#define portNVIC_SYSTICK_ENABLE 0x00000001 -#define portNVIC_PENDSVSET 0x10000000 -#define portNVIC_PENDSV_PRI ( ( ( unsigned long ) configKERNEL_INTERRUPT_PRIORITY ) << 16 ) -#define portNVIC_SYSTICK_PRI ( ( ( unsigned long ) configKERNEL_INTERRUPT_PRIORITY ) << 24 ) - -/* Constants required to set up the initial stack. */ -#define portINITIAL_XPSR ( 0x01000000 ) - -/* The priority used by the kernel is assigned to a variable to make access -from inline assembler easier. */ -const unsigned long ulKernelPriority = configKERNEL_INTERRUPT_PRIORITY; - -/* Each task maintains its own interrupt status in the critical nesting -variable. */ -static unsigned portBASE_TYPE uxCriticalNesting = 0xaaaaaaaa; - -/* - * Setup the timer to generate the tick interrupts. - */ -static void prvSetupTimerInterrupt( void ); - -/* - * Exception handlers. - */ -void xPortPendSVHandler( void ) __attribute__ (( naked )); -void xPortSysTickHandler( void ); -void vPortSVCHandler( void ) __attribute__ (( naked )); - -/* - * Start first task is a separate function so it can be tested in isolation. - */ -void vPortStartFirstTask( void ) __attribute__ (( naked )); - -/*-----------------------------------------------------------*/ - -/* - * See header file for description. - */ -portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters ) -{ - /* Simulate the stack frame as it would be created by a context switch - interrupt. */ - pxTopOfStack--; /* Offset added to account for the way the MCU uses the stack on entry/exit of interrupts. */ - *pxTopOfStack = portINITIAL_XPSR; /* xPSR */ - pxTopOfStack--; - *pxTopOfStack = ( portSTACK_TYPE ) pxCode; /* PC */ - pxTopOfStack--; - *pxTopOfStack = 0; /* LR */ - pxTopOfStack -= 5; /* R12, R3, R2 and R1. */ - *pxTopOfStack = ( portSTACK_TYPE ) pvParameters; /* R0 */ - pxTopOfStack -= 8; /* R11, R10, R9, R8, R7, R6, R5 and R4. */ - - return pxTopOfStack; -} -/*-----------------------------------------------------------*/ - -void vPortSVCHandler( void ) -{ - __asm volatile ( - " ldr r3, pxCurrentTCBConst2 \n" /* Restore the context. */ - " ldr r1, [r3] \n" /* Use pxCurrentTCBConst to get the pxCurrentTCB address. */ - " ldr r0, [r1] \n" /* The first item in pxCurrentTCB is the task top of stack. */ - " ldmia r0!, {r4-r11} \n" /* Pop the registers that are not automatically saved on exception entry and the critical nesting count. */ - " msr psp, r0 \n" /* Restore the task stack pointer. */ - " mov r0, #0 \n" - " msr basepri, r0 \n" - " orr r14, #0xd \n" - " bx r14 \n" - " \n" - " .align 2 \n" - "pxCurrentTCBConst2: .word pxCurrentTCB \n" - ); -} -/*-----------------------------------------------------------*/ - -void vPortStartFirstTask( void ) -{ - __asm volatile( - " ldr r0, =0xE000ED08 \n" /* Use the NVIC offset register to locate the stack. */ - " ldr r0, [r0] \n" - " ldr r0, [r0] \n" - " msr msp, r0 \n" /* Set the msp back to the start of the stack. */ - " svc 0 \n" /* System call to start first task. */ - ); -} -/*-----------------------------------------------------------*/ - -/* - * See header file for description. - */ -portBASE_TYPE xPortStartScheduler( void ) -{ - /* Make PendSV, CallSV and SysTick the same priroity as the kernel. */ - *(portNVIC_SYSPRI2) |= portNVIC_PENDSV_PRI; - *(portNVIC_SYSPRI2) |= portNVIC_SYSTICK_PRI; - - /* Start the timer that generates the tick ISR. Interrupts are disabled - here already. */ - prvSetupTimerInterrupt(); - - /* Initialise the critical nesting count ready for the first task. */ - uxCriticalNesting = 0; - - /* Start the first task. */ - vPortStartFirstTask(); - - /* Should not get here! */ - return 0; -} -/*-----------------------------------------------------------*/ - -void vPortEndScheduler( void ) -{ - /* It is unlikely that the CM3 port will require this function as there - is nothing to return to. */ -} -/*-----------------------------------------------------------*/ - -void vPortYieldFromISR( void ) -{ - /* Set a PendSV to request a context switch. */ - *(portNVIC_INT_CTRL) = portNVIC_PENDSVSET; -} -/*-----------------------------------------------------------*/ - -void vPortEnterCritical( void ) -{ - portDISABLE_INTERRUPTS(); - uxCriticalNesting++; -} -/*-----------------------------------------------------------*/ - -void vPortExitCritical( void ) -{ - uxCriticalNesting--; - if( uxCriticalNesting == 0 ) - { - portENABLE_INTERRUPTS(); - } -} -/*-----------------------------------------------------------*/ - -void xPortPendSVHandler( void ) -{ - /* This is a naked function. */ - - __asm volatile - ( - " mrs r0, psp \n" - " \n" - " ldr r3, pxCurrentTCBConst \n" /* Get the location of the current TCB. */ - " ldr r2, [r3] \n" - " \n" - " stmdb r0!, {r4-r11} \n" /* Save the remaining registers. */ - " str r0, [r2] \n" /* Save the new top of stack into the first member of the TCB. */ - " \n" - " stmdb sp!, {r3, r14} \n" - " mov r0, %0 \n" - " msr basepri, r0 \n" - " bl vTaskSwitchContext \n" - " mov r0, #0 \n" - " msr basepri, r0 \n" - " ldmia sp!, {r3, r14} \n" - " \n" /* Restore the context, including the critical nesting count. */ - " ldr r1, [r3] \n" - " ldr r0, [r1] \n" /* The first item in pxCurrentTCB is the task top of stack. */ - " ldmia r0!, {r4-r11} \n" /* Pop the registers. */ - " msr psp, r0 \n" - " bx r14 \n" - " \n" - " .align 2 \n" - "pxCurrentTCBConst: .word pxCurrentTCB \n" - ::"i"(configMAX_SYSCALL_INTERRUPT_PRIORITY) - ); -} -/*-----------------------------------------------------------*/ - -void xPortSysTickHandler( void ) -{ -unsigned long ulDummy; - - /* If using preemption, also force a context switch. */ - #if configUSE_PREEMPTION == 1 - *(portNVIC_INT_CTRL) = portNVIC_PENDSVSET; - #endif - - ulDummy = portSET_INTERRUPT_MASK_FROM_ISR(); - { - vTaskIncrementTick(); - } - portCLEAR_INTERRUPT_MASK_FROM_ISR( ulDummy ); -} -/*-----------------------------------------------------------*/ - -/* - * Setup the systick timer to generate the tick interrupts at the required - * frequency. - */ -void prvSetupTimerInterrupt( void ) -{ - /* Configure SysTick to interrupt at the requested rate. */ - *(portNVIC_SYSTICK_LOAD) = ( configCPU_CLOCK_HZ / configTICK_RATE_HZ ) - 1UL; - *(portNVIC_SYSTICK_CTRL) = portNVIC_SYSTICK_CLK | portNVIC_SYSTICK_INT | portNVIC_SYSTICK_ENABLE; -} -/*-----------------------------------------------------------*/ - -- cgit v1.2.3