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https://github.com/FreeRTOS/FreeRTOS-Kernel.git
synced 2025-09-01 11:53:53 -04:00
Re-sync with upstream and stripping away none kernel related.
This commit is contained in:
Yuhui Zheng
parent
9c0c37ab9b
commit
210b1ffcc8
13732 changed files with 49 additions and 7054697 deletions
222
portable/ThirdParty/XCC/Xtensa/port.c
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portable/ThirdParty/XCC/Xtensa/port.c
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/*
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* FreeRTOS Kernel V10.0.0
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* Copyright (C) 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software. If you wish to use our Amazon
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* FreeRTOS name, please do so in a fair use way that does not cause confusion.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* http://www.FreeRTOS.org
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* http://aws.amazon.com/freertos
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*
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* 1 tab == 4 spaces!
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*/
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/*
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* Copyright (c) 2015-2019 Cadence Design Systems, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <stdlib.h>
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#include <xtensa/config/core.h>
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#include "xtensa_rtos.h"
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#include "FreeRTOS.h"
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#include "task.h"
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/* Defined in portasm.h */
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extern void _frxt_tick_timer_init(void);
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/* Defined in xtensa_context.S */
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extern void _xt_coproc_init(void);
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/*-----------------------------------------------------------*/
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/* We require the address of the pxCurrentTCB variable, but don't want to know
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any details of its type. */
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typedef void TCB_t;
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extern volatile TCB_t * volatile pxCurrentTCB;
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unsigned port_xSchedulerRunning = 0; // Duplicate of inaccessible xSchedulerRunning; needed at startup to avoid counting nesting
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unsigned port_interruptNesting = 0; // Interrupt nesting level
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/*-----------------------------------------------------------*/
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// User exception dispatcher when exiting
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void _xt_user_exit(void);
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/*
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* Stack initialization
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*/
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#if portUSING_MPU_WRAPPERS
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StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters, BaseType_t xRunPrivileged )
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#else
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StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters )
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#endif
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{
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StackType_t *sp, *tp;
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XtExcFrame *frame;
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#if XCHAL_CP_NUM > 0
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uint32_t *p;
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#endif
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/* Create interrupt stack frame aligned to 16 byte boundary */
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sp = (StackType_t *) (((UBaseType_t)(pxTopOfStack + 1) - XT_CP_SIZE - XT_STK_FRMSZ) & ~0xf);
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/* Clear the entire frame (do not use memset() because we don't depend on C library) */
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for (tp = sp; tp <= pxTopOfStack; ++tp)
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*tp = 0;
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frame = (XtExcFrame *) sp;
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/* Explicitly initialize certain saved registers */
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frame->pc = (UBaseType_t) pxCode; /* task entrypoint */
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frame->a0 = 0; /* to terminate GDB backtrace */
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frame->a1 = (UBaseType_t) sp + XT_STK_FRMSZ; /* physical top of stack frame */
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frame->exit = (UBaseType_t) _xt_user_exit; /* user exception exit dispatcher */
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/* Set initial PS to int level 0, EXCM disabled ('rfe' will enable), user mode. */
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/* Also set entry point argument parameter. */
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#ifdef __XTENSA_CALL0_ABI__
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frame->a2 = (UBaseType_t) pvParameters;
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frame->ps = PS_UM | PS_EXCM;
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#else
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/* + for windowed ABI also set WOE and CALLINC (pretend task was 'call4'd). */
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frame->a6 = (UBaseType_t) pvParameters;
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frame->ps = PS_UM | PS_EXCM | PS_WOE | PS_CALLINC(1);
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#endif
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#ifdef XT_USE_SWPRI
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/* Set the initial virtual priority mask value to all 1's. */
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frame->vpri = 0xFFFFFFFF;
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#endif
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#if XCHAL_CP_NUM > 0
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/* Init the coprocessor save area (see xtensa_context.h) */
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/* No access to TCB here, so derive indirectly. Stack growth is top to bottom.
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* //p = (uint32_t *) xMPUSettings->coproc_area;
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*/
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p = (uint32_t *)(((uint32_t) pxTopOfStack - XT_CP_SIZE) & ~0xf);
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p[0] = 0;
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p[1] = 0;
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p[2] = (((uint32_t) p) + 12 + XCHAL_TOTAL_SA_ALIGN - 1) & -XCHAL_TOTAL_SA_ALIGN;
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#endif
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return sp;
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}
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/*-----------------------------------------------------------*/
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void vPortEndScheduler( void )
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{
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/* It is unlikely that the Xtensa port will get stopped. If required simply
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disable the tick interrupt here. */
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}
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/*-----------------------------------------------------------*/
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BaseType_t xPortStartScheduler( void )
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{
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// Interrupts are disabled at this point and stack contains PS with enabled interrupts when task context is restored
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#if XCHAL_CP_NUM > 0
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/* Initialize co-processor management for tasks. Leave CPENABLE alone. */
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_xt_coproc_init();
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#endif
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/* Init the tick divisor value */
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_xt_tick_divisor_init();
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/* Setup the hardware to generate the tick. */
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_frxt_tick_timer_init();
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#if XT_USE_THREAD_SAFE_CLIB
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// Init C library
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vPortClibInit();
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#endif
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port_xSchedulerRunning = 1;
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// Cannot be directly called from C; never returns
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__asm__ volatile ("call0 _frxt_dispatch\n");
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/* Should not get here. */
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return pdTRUE;
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}
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/*-----------------------------------------------------------*/
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BaseType_t xPortSysTickHandler( void )
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{
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BaseType_t ret;
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uint32_t interruptMask;
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portbenchmarkIntLatency();
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/* Interrupts upto configMAX_SYSCALL_INTERRUPT_PRIORITY must be
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* disabled before calling xTaskIncrementTick as it access the
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* kernel lists. */
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interruptMask = portSET_INTERRUPT_MASK_FROM_ISR();
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{
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ret = xTaskIncrementTick();
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}
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portCLEAR_INTERRUPT_MASK_FROM_ISR( interruptMask );
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portYIELD_FROM_ISR( ret );
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return ret;
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}
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/*-----------------------------------------------------------*/
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/*
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* Used to set coprocessor area in stack. Current hack is to reuse MPU pointer for coprocessor area.
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*/
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#if portUSING_MPU_WRAPPERS
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void vPortStoreTaskMPUSettings( xMPU_SETTINGS *xMPUSettings, const struct xMEMORY_REGION * const xRegions, StackType_t *pxBottomOfStack, uint32_t ulStackDepth )
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{
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#if XCHAL_CP_NUM > 0
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xMPUSettings->coproc_area = (StackType_t*)((((uint32_t)(pxBottomOfStack + ulStackDepth - 1)) - XT_CP_SIZE ) & ~0xf);
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/* NOTE: we cannot initialize the coprocessor save area here because FreeRTOS is going to
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* clear the stack area after we return. This is done in pxPortInitialiseStack().
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*/
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#endif
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}
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#endif
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