mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
synced 2025-09-12 00:57:44 -04:00
revert :: mostly go back to the default port definitions from RISCV
This commit is contained in:
Shaba Abhiram
parent
49d03aedb2
commit
021e86659d
3 changed files with 641 additions and 608 deletions
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@ -2,22 +2,23 @@
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* FreeRTOS Kernel V10.3.1
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* Copyright (C) 2020 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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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, 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.
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* The above copyright notice and this permission notice shall be included in
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* 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, 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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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* 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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@ -31,49 +32,33 @@
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/* Scheduler includes. */
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#include "FreeRTOS.h"
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#include "task.h"
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#include "portmacro.h"
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#include "task.h"
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/* Standard includes. */
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#include "string.h"
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#ifdef configCLINT_BASE_ADDRESS
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#warning The configCLINT_BASE_ADDRESS constant has been deprecated. configMTIME_BASE_ADDRESS and configMTIMECMP_BASE_ADDRESS are currently being derived from the (possibly 0) configCLINT_BASE_ADDRESS setting. Please update to define configMTIME_BASE_ADDRESS and configMTIMECMP_BASE_ADDRESS dirctly in place of configCLINT_BASE_ADDRESS. See https://www.freertos.org/Using-FreeRTOS-on-RISC-V.html
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#warning The configCLINT_BASE_ADDRESS constant has been deprecated. configMTIME_BASE_ADDRESS and configMTIMECMP_BASE_ADDRESS are currently being derived from the (possibly 0) configCLINT_BASE_ADDRESS setting. Please update to define configMTIME_BASE_ADDRESS and configMTIMECMP_BASE_ADDRESS dirctly in place of configCLINT_BASE_ADDRESS. See https://www.freertos.org/Using-FreeRTOS-on-RISC-V.html
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#endif
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#ifndef configMTIME_BASE_ADDRESS
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#warning configMTIME_BASE_ADDRESS must be defined in FreeRTOSConfig.h. If the target chip includes a memory-mapped mtime register then set configMTIME_BASE_ADDRESS to the mapped address. Otherwise set configMTIME_BASE_ADDRESS to 0. See https://www.freertos.org/Using-FreeRTOS-on-RISC-V.html
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#warning configMTIME_BASE_ADDRESS must be defined in FreeRTOSConfig.h. If the target chip includes a memory-mapped mtime register then set configMTIME_BASE_ADDRESS to the mapped address. Otherwise set configMTIME_BASE_ADDRESS to 0. See https://www.freertos.org/Using-FreeRTOS-on-RISC-V.html
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#endif
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#ifndef configMTIMECMP_BASE_ADDRESS
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#warning configMTIMECMP_BASE_ADDRESS must be defined in FreeRTOSConfig.h. If the target chip includes a memory-mapped mtimecmp register then set configMTIMECMP_BASE_ADDRESS to the mapped address. Otherwise set configMTIMECMP_BASE_ADDRESS to 0. See https://www.freertos.org/Using-FreeRTOS-on-RISC-V.html
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#warning configMTIMECMP_BASE_ADDRESS must be defined in FreeRTOSConfig.h. If the target chip includes a memory-mapped mtimecmp register then set configMTIMECMP_BASE_ADDRESS to the mapped address. Otherwise set configMTIMECMP_BASE_ADDRESS to 0. See https://www.freertos.org/Using-FreeRTOS-on-RISC-V.html
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#endif
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/* Let the user override the pre-loading of the initial LR with the address of
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prvTaskExitError() in case it messes up unwinding of the stack in the
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debugger. */
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#ifdef configTASK_RETURN_ADDRESS
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#define portTASK_RETURN_ADDRESS configTASK_RETURN_ADDRESS
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#define portTASK_RETURN_ADDRESS configTASK_RETURN_ADDRESS
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#else
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#define portTASK_RETURN_ADDRESS prvTaskExitError
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#define portTASK_RETURN_ADDRESS prvTaskExitError
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#endif
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/* A variable is used to keep track of the critical section nesting. This
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variable has to be stored as part of the task context and must be initialised to
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a non zero value to ensure interrupts don't inadvertently become unmasked before
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the scheduler starts. As it is stored as part of the task context it will
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automatically be set to 0 when the first task is started. */
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static UBaseType_t uxCriticalNesting = 0xaaaaaaaa;
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/*
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* As of version 1.10, these addresses reflect the configuration of the
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* emulated SoC of the Spike RISC-V emulator with respect to the
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* Machine Timer Registers mtime and mtimecmp
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*/
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#define CLINT_BASE 0x2000000
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volatile uint64_t* mtime = (uint64_t*)(CLINT_BASE + 0xbff8);
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volatile uint64_t* timecmp = (uint64_t*)(CLINT_BASE + 0x4000);
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/* The stack used by interrupt service routines. Set configISR_STACK_SIZE_WORDS
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to use a statically allocated array as the interrupt stack. Alternative leave
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configISR_STACK_SIZE_WORDS undefined and update the linker script so that a
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@ -82,16 +67,19 @@ of the stack used by main. Using the linker script method will repurpose the
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stack that was used by main before the scheduler was started for use as the
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interrupt stack after the scheduler has started. */
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#ifdef configISR_STACK_SIZE_WORDS
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static __attribute__ ((aligned(16))) StackType_t xISRStack[ configISR_STACK_SIZE_WORDS ] = { 0 };
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const StackType_t xISRStackTop = ( StackType_t ) &( xISRStack[ configISR_STACK_SIZE_WORDS & ~portBYTE_ALIGNMENT_MASK ] );
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static __attribute__((aligned(16)))
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StackType_t xISRStack[configISR_STACK_SIZE_WORDS] = {0};
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const StackType_t xISRStackTop =
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(StackType_t) &
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(xISRStack[configISR_STACK_SIZE_WORDS & ~portBYTE_ALIGNMENT_MASK]);
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/* Don't use 0xa5 as the stack fill bytes as that is used by the kernerl for
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the task stacks, and so will legitimately appear in many positions within
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the ISR stack. */
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#define portISR_STACK_FILL_BYTE 0xee
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/* Don't use 0xa5 as the stack fill bytes as that is used by the kernerl for
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the task stacks, and so will legitimately appear in many positions within
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the ISR stack. */
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#define portISR_STACK_FILL_BYTE 0xee
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#else
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extern const uint32_t __freertos_irq_stack_top[];
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const StackType_t xISRStackTop = ( StackType_t ) __freertos_irq_stack_top;
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extern const uint32_t __freertos_irq_stack_top[];
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const StackType_t xISRStackTop = (StackType_t)__freertos_irq_stack_top;
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#endif
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/*
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@ -99,170 +87,128 @@ interrupt stack after the scheduler has started. */
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* file is weak to allow application writers to change the timer used to
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* generate the tick interrupt.
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*/
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void vPortSetupTimerInterrupt( void ) __attribute__(( weak ));
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/*
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* Setup the timer to generate the tick interrupts.
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*/
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void vPortSetupTimer(void);
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void vPortSysTickHandler(void);
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/*
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* Set the next interval for the timer
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*/
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static void prvSetNextTimerInterrupt(void);
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/*
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* Used to catch tasks that attempt to return from their implementing function.
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*/
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static void prvTaskExitError(void);
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/*-----------------------------------------------------------*/
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void prvTaskExitError(void)
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{
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/* A function that implements a task must not exit or attempt to return to
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its caller as there is nothing to return to. If a task wants to exit it
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should instead call vTaskDelete( NULL ).
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Artificially force an assert() to be triggered if configASSERT() is
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defined, then stop here so application writers can catch the error. */
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configASSERT(uxCriticalNesting == ~0UL);
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portDISABLE_INTERRUPTS();
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for (;;)
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;
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}
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/* Sets the next timer interrupt
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* Reads current timer register and adds tickrate
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* Does nothing if a Clint was not found in the hardware configuration string
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* Using previous timer compare may fail if interrupts were disabled for a long
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* time, which is likely for the very first interrupt. When that happens,
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* compare timer + tickrate may already be behind current timer and prevent
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* correctly programming the 2nd interrupt
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*/
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static void prvSetNextTimerInterrupt(void)
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{
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if (mtime && timecmp)
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*timecmp = *mtime + (configTICK_CLOCK_HZ / configTICK_RATE_HZ);
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}
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/*-----------------------------------------------------------*/
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/* Sets and enable the timer interrupt */
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void vPortSetupTimer(void)
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{
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/* reuse existing routine */
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prvSetNextTimerInterrupt();
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/* Enable timer interupt */
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__asm volatile("csrs mie,%0" ::"r"(0x80));
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}
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void vPortSetupTimerInterrupt(void) __attribute__((weak));
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/*-----------------------------------------------------------*/
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/* Used to program the machine timer compare register. */
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uint64_t ullNextTime = 0ULL;
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const uint64_t *pullNextTime = &ullNextTime;
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const size_t uxTimerIncrementsForOneTick = ( size_t ) ( ( configCPU_CLOCK_HZ ) / ( configTICK_RATE_HZ ) ); /* Assumes increment won't go over 32-bits. */
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const size_t uxTimerIncrementsForOneTick = (size_t)(
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(configCPU_CLOCK_HZ) /
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(configTICK_RATE_HZ)); /* Assumes increment won't go over 32-bits. */
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uint32_t const ullMachineTimerCompareRegisterBase = configMTIMECMP_BASE_ADDRESS;
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volatile uint64_t * pullMachineTimerCompareRegister = NULL;
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volatile uint64_t *pullMachineTimerCompareRegister = NULL;
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/* Set configCHECK_FOR_STACK_OVERFLOW to 3 to add ISR stack checking to task
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stack checking. A problem in the ISR stack will trigger an assert, not call the
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stack overflow hook function (because the stack overflow hook is specific to a
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task stack, not the ISR stack). */
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#if defined( configISR_STACK_SIZE_WORDS ) && ( configCHECK_FOR_STACK_OVERFLOW > 2 )
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#warning This path not tested, or even compiled yet.
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#if defined(configISR_STACK_SIZE_WORDS) && (configCHECK_FOR_STACK_OVERFLOW > 2)
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#warning This path not tested, or even compiled yet.
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static const uint8_t ucExpectedStackBytes[] = {
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portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, \
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portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, \
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portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, \
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portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, \
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portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE }; \
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static const uint8_t ucExpectedStackBytes[] = {
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portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE,
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portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE,
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portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE,
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portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE,
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portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE,
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portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE,
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portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE};
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#define portCHECK_ISR_STACK() configASSERT( ( memcmp( ( void * ) xISRStack, ( void * ) ucExpectedStackBytes, sizeof( ucExpectedStackBytes ) ) == 0 ) )
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#define portCHECK_ISR_STACK() \
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configASSERT((memcmp((void *)xISRStack, (void *)ucExpectedStackBytes, \
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sizeof(ucExpectedStackBytes)) == 0))
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#else
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/* Define the function away. */
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#define portCHECK_ISR_STACK()
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/* Define the function away. */
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#define portCHECK_ISR_STACK()
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#endif /* configCHECK_FOR_STACK_OVERFLOW > 2 */
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/*-----------------------------------------------------------*/
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#if( configMTIME_BASE_ADDRESS != 0 ) && ( configMTIMECMP_BASE_ADDRESS != 0 )
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#if (configMTIME_BASE_ADDRESS != 0) && (configMTIMECMP_BASE_ADDRESS != 0)
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void vPortSetupTimerInterrupt( void )
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{
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void vPortSetupTimerInterrupt(void)
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{
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uint32_t ulCurrentTimeHigh, ulCurrentTimeLow;
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volatile uint32_t * const pulTimeHigh = ( volatile uint32_t * const ) ( ( configMTIME_BASE_ADDRESS ) + 4UL ); /* 8-byte typer so high 32-bit word is 4 bytes up. */
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volatile uint32_t * const pulTimeLow = ( volatile uint32_t * const ) ( configMTIME_BASE_ADDRESS );
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volatile uint32_t *const pulTimeHigh = (volatile uint32_t *const)(
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(configMTIME_BASE_ADDRESS) +
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4UL); /* 8-byte typer so high 32-bit word is 4 bytes up. */
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volatile uint32_t *const pulTimeLow =
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(volatile uint32_t *const)(configMTIME_BASE_ADDRESS);
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volatile uint32_t ulHartId;
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__asm volatile( "csrr %0, mhartid" : "=r"( ulHartId ) );
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pullMachineTimerCompareRegister = ( volatile uint64_t * ) ( ullMachineTimerCompareRegisterBase + ( ulHartId * sizeof( uint64_t ) ) );
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__asm volatile("csrr %0, mhartid" : "=r"(ulHartId));
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pullMachineTimerCompareRegister =
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(volatile uint64_t *)(ullMachineTimerCompareRegisterBase +
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(ulHartId * sizeof(uint64_t)));
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do
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{
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ulCurrentTimeHigh = *pulTimeHigh;
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ulCurrentTimeLow = *pulTimeLow;
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} while( ulCurrentTimeHigh != *pulTimeHigh );
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} while (ulCurrentTimeHigh != *pulTimeHigh);
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ullNextTime = ( uint64_t ) ulCurrentTimeHigh;
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ullNextTime = (uint64_t)ulCurrentTimeHigh;
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ullNextTime <<= 32ULL; /* High 4-byte word is 32-bits up. */
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ullNextTime |= ( uint64_t ) ulCurrentTimeLow;
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ullNextTime += ( uint64_t ) uxTimerIncrementsForOneTick;
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ullNextTime |= (uint64_t)ulCurrentTimeLow;
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ullNextTime += (uint64_t)uxTimerIncrementsForOneTick;
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*pullMachineTimerCompareRegister = ullNextTime;
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/* Prepare the time to use after the next tick interrupt. */
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ullNextTime += ( uint64_t ) uxTimerIncrementsForOneTick;
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}
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ullNextTime += (uint64_t)uxTimerIncrementsForOneTick;
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}
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#endif /* ( configMTIME_BASE_ADDRESS != 0 ) && ( configMTIME_BASE_ADDRESS != 0 ) */
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#endif /* ( configMTIME_BASE_ADDRESS != 0 ) && ( configMTIME_BASE_ADDRESS != 0 \
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) */
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/*-----------------------------------------------------------*/
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BaseType_t xPortStartScheduler( void )
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BaseType_t xPortStartScheduler(void)
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{
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extern void xPortStartFirstTask( void );
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extern void xPortStartFirstTask(void);
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#if( configASSERT_DEFINED == 1 )
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#if (configASSERT_DEFINED == 1)
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{
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volatile uint32_t mtvec = 0;
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/* Check the least significant two bits of mtvec are 00 - indicating
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single vector mode. */
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__asm volatile( "csrr %0, mtvec" : "=r"( mtvec ) );
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configASSERT( ( mtvec & 0x03UL ) == 0 );
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__asm volatile("csrr %0, mtvec" : "=r"(mtvec));
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configASSERT((mtvec & 0x03UL) == 0);
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/* Check alignment of the interrupt stack - which is the same as the
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stack that was being used by main() prior to the scheduler being
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started. */
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configASSERT( ( xISRStackTop & portBYTE_ALIGNMENT_MASK ) == 0 );
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configASSERT((xISRStackTop & portBYTE_ALIGNMENT_MASK) == 0);
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#ifdef configISR_STACK_SIZE_WORDS
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#ifdef configISR_STACK_SIZE_WORDS
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{
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memset( ( void * ) xISRStack, portISR_STACK_FILL_BYTE, sizeof( xISRStack ) );
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memset((void *)xISRStack, portISR_STACK_FILL_BYTE,
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sizeof(xISRStack));
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}
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#endif /* configISR_STACK_SIZE_WORDS */
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#endif /* configISR_STACK_SIZE_WORDS */
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}
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#endif /* configASSERT_DEFINED */
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#endif /* configASSERT_DEFINED */
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/* If there is a CLINT then it is ok to use the default implementation
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in this file, otherwise vPortSetupTimerInterrupt() must be implemented to
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configure whichever clock is to be used to generate the tick interrupt. */
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vPortSetupTimerInterrupt();
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#if( ( configMTIME_BASE_ADDRESS != 0 ) && ( configMTIMECMP_BASE_ADDRESS != 0 ) )
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#if ((configMTIME_BASE_ADDRESS != 0) && (configMTIMECMP_BASE_ADDRESS != 0))
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{
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/* Enable mtime and external interrupts. 1<<7 for timer interrupt, 1<<11
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for external interrupt. _RB_ What happens here when mtime is not present as
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with pulpino? */
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__asm volatile( "csrs mie, %0" :: "r"(0x880) );
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/* Enable mtime and external interrupts. 1<<7 for timer interrupt,
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1<<11 for external interrupt. _RB_ What happens here when mtime is not
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present as with pulpino? */
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__asm volatile("csrs mie, %0" ::"r"(0x880));
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}
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#else
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#else
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{
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/* Enable external interrupts. */
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__asm volatile( "csrs mie, %0" :: "r"(0x800) );
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__asm volatile("csrs mie, %0" ::"r"(0x800));
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}
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#endif /* ( configMTIME_BASE_ADDRESS != 0 ) && ( configMTIMECMP_BASE_ADDRESS != 0 ) */
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#endif /* ( configMTIME_BASE_ADDRESS != 0 ) && ( configMTIMECMP_BASE_ADDRESS \
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!= 0 ) */
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xPortStartFirstTask();
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|
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@ -272,40 +218,9 @@ extern void xPortStartFirstTask( void );
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}
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/*-----------------------------------------------------------*/
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void vPortEndScheduler( void )
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void vPortEndScheduler(void)
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{
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/* Not implemented. */
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for( ;; );
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||||
}
|
||||
|
||||
/*
|
||||
* 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. */
|
||||
register int *tp asm("x3");
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = (portSTACK_TYPE)pxCode; /* Start address */
|
||||
pxTopOfStack -= 22;
|
||||
*pxTopOfStack = (portSTACK_TYPE)pvParameters; /* Register a0 */
|
||||
pxTopOfStack -= 6;
|
||||
*pxTopOfStack = (portSTACK_TYPE)tp; /* Register thread pointer */
|
||||
pxTopOfStack -= 3;
|
||||
*pxTopOfStack = (portSTACK_TYPE)prvTaskExitError; /* Register ra */
|
||||
|
||||
return pxTopOfStack;
|
||||
}
|
||||
|
||||
void vPortSysTickHandler(void)
|
||||
{
|
||||
prvSetNextTimerInterrupt();
|
||||
|
||||
/* Increment the RTOS tick. */
|
||||
if (xTaskIncrementTick() != pdFALSE)
|
||||
{
|
||||
vTaskSwitchContext();
|
||||
}
|
||||
for (;;)
|
||||
;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,325 +1,441 @@
|
|||
/*
|
||||
FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
|
||||
All rights reserved
|
||||
|
||||
VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
|
||||
|
||||
This file is part of the FreeRTOS distribution and was contributed
|
||||
to the project by Technolution B.V. (www.technolution.nl,
|
||||
freertos-riscv@technolution.eu) under the terms of the FreeRTOS
|
||||
contributors license.
|
||||
|
||||
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 modification 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. Full license text is available on the following
|
||||
link: http://www.freertos.org/a00114.html
|
||||
|
||||
***************************************************************************
|
||||
* *
|
||||
* FreeRTOS provides completely free yet professionally developed, *
|
||||
* robust, strictly quality controlled, supported, and cross *
|
||||
* platform software that is more than just the market leader, it *
|
||||
* is the industry''s de facto standard. *
|
||||
* *
|
||||
* Help yourself get started quickly while simultaneously helping *
|
||||
* to support the FreeRTOS project by purchasing a FreeRTOS *
|
||||
* tutorial book, reference manual, or both: *
|
||||
* http://www.FreeRTOS.org/Documentation *
|
||||
* *
|
||||
***************************************************************************
|
||||
|
||||
http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
|
||||
the FAQ page "My application does not run, what could be wrong?". Have you
|
||||
defined configASSERT()?
|
||||
|
||||
http://www.FreeRTOS.org/support - In return for receiving this top quality
|
||||
embedded software for free we request you assist our global community by
|
||||
participating in the support forum.
|
||||
|
||||
http://www.FreeRTOS.org/training - Investing in training allows your team to
|
||||
be as productive as possible as early as possible. Now you can receive
|
||||
FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
|
||||
Ltd, and the world's leading authority on the world's leading RTOS.
|
||||
|
||||
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
|
||||
including FreeRTOS+Trace - an indispensable productivity tool, a DOS
|
||||
compatible FAT file system, and our tiny thread aware UDP/IP stack.
|
||||
|
||||
http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
|
||||
Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
|
||||
|
||||
http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
|
||||
Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
|
||||
licenses offer ticketed support, indemnification and commercial middleware.
|
||||
|
||||
http://www.SafeRTOS.com - High Integrity Systems also provide a safety
|
||||
engineered and independently SIL3 certified version for use in safety and
|
||||
mission critical applications that require provable dependability.
|
||||
|
||||
1 tab == 4 spaces!
|
||||
*/
|
||||
|
||||
* FreeRTOS Kernel V10.3.1
|
||||
* Copyright (C) 2020 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.
|
||||
*
|
||||
* 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!
|
||||
*/
|
||||
|
||||
/*
|
||||
* The FreeRTOS kernel's RISC-V port is split between the the code that is
|
||||
* common across all currently supported RISC-V chips (implementations of the
|
||||
* RISC-V ISA), and code which tailors the port to a specific RISC-V chip:
|
||||
*
|
||||
* + The code that is common to all RISC-V chips is implemented in
|
||||
* FreeRTOS\Source\portable\GCC\RISC-V-RV32\portASM.S. There is only one
|
||||
* portASM.S file because the same file is used no matter which RISC-V chip is
|
||||
* in use.
|
||||
*
|
||||
* + The code that tailors the kernel's RISC-V port to a specific RISC-V
|
||||
* chip is implemented in freertos_risc_v_chip_specific_extensions.h. There
|
||||
* is one freertos_risc_v_chip_specific_extensions.h that can be used with any
|
||||
* RISC-V chip that both includes a standard CLINT and does not add to the
|
||||
* base set of RISC-V registers. There are additional
|
||||
* freertos_risc_v_chip_specific_extensions.h files for RISC-V implementations
|
||||
* that do not include a standard CLINT or do add to the base set of RISC-V
|
||||
* registers.
|
||||
*
|
||||
* CARE MUST BE TAKEN TO INCLDUE THE CORRECT
|
||||
* freertos_risc_v_chip_specific_extensions.h HEADER FILE FOR THE CHIP
|
||||
* IN USE. To include the correct freertos_risc_v_chip_specific_extensions.h
|
||||
* header file ensure the path to the correct header file is in the assembler's
|
||||
* include path.
|
||||
*
|
||||
* This freertos_risc_v_chip_specific_extensions.h is for use on RISC-V chips
|
||||
* that include a standard CLINT and do not add to the base set of RISC-V
|
||||
* registers.
|
||||
*
|
||||
*/
|
||||
#if __riscv_xlen == 64
|
||||
# define STORE sd
|
||||
# define LOAD ld
|
||||
# define REGBYTES 8
|
||||
#define portWORD_SIZE 8
|
||||
#define store_x sd
|
||||
#define load_x ld
|
||||
#elif __riscv_xlen == 32
|
||||
#define store_x sw
|
||||
#define load_x lw
|
||||
#define portWORD_SIZE 4
|
||||
#else
|
||||
# define STORE sw
|
||||
# define LOAD lw
|
||||
# define REGBYTES 4
|
||||
#error Assembler did not define __riscv_xlen
|
||||
#endif
|
||||
|
||||
/* Enable interrupts when returning from the handler */
|
||||
#define MSTATUS_PRV1 0x1880
|
||||
#include "freertos_risc_v_chip_specific_extensions.h"
|
||||
|
||||
/* Check the freertos_risc_v_chip_specific_extensions.h and/or command line
|
||||
definitions. */
|
||||
#if defined( portasmHAS_CLINT ) && defined( portasmHAS_MTIME )
|
||||
#error The portasmHAS_CLINT constant has been deprecated. Please replace it with portasmHAS_MTIME. portasmHAS_CLINT and portasmHAS_MTIME cannot both be defined at once. See https://www.freertos.org/Using-FreeRTOS-on-RISC-V.html
|
||||
#endif
|
||||
|
||||
#ifdef portasmHAS_CLINT
|
||||
#warning The portasmHAS_CLINT constant has been deprecated. Please replace it with portasmHAS_MTIME and portasmHAS_SIFIVE_CLINT. For now portasmHAS_MTIME and portasmHAS_SIFIVE_CLINT are derived from portasmHAS_CLINT. See https://www.freertos.org/Using-FreeRTOS-on-RISC-V.html
|
||||
#define portasmHAS_MTIME portasmHAS_CLINT
|
||||
#define portasmHAS_SIFIVE_CLINT portasmHAS_CLINT
|
||||
#endif
|
||||
|
||||
#ifndef portasmHAS_MTIME
|
||||
#error freertos_risc_v_chip_specific_extensions.h must define portasmHAS_MTIME to either 1 (MTIME clock present) or 0 (MTIME clock not present). See https://www.freertos.org/Using-FreeRTOS-on-RISC-V.html
|
||||
#endif
|
||||
|
||||
#ifndef portasmHANDLE_INTERRUPT
|
||||
#error portasmHANDLE_INTERRUPT must be defined to the function to be called to handle external/peripheral interrupts. portasmHANDLE_INTERRUPT can be defined on the assembler command line or in the appropriate freertos_risc_v_chip_specific_extensions.h header file. https://www.freertos.org/Using-FreeRTOS-on-RISC-V.html
|
||||
#endif
|
||||
|
||||
#ifndef portasmHAS_SIFIVE_CLINT
|
||||
#define portasmHAS_SIFIVE_CLINT 0
|
||||
#endif
|
||||
|
||||
/* Only the standard core registers are stored by default. Any additional
|
||||
registers must be saved by the portasmSAVE_ADDITIONAL_REGISTERS and
|
||||
portasmRESTORE_ADDITIONAL_REGISTERS macros - which can be defined in a chip
|
||||
specific version of freertos_risc_v_chip_specific_extensions.h. See the notes
|
||||
at the top of this file. */
|
||||
#define portCONTEXT_SIZE ( 30 * portWORD_SIZE )
|
||||
|
||||
.global xPortStartFirstTask
|
||||
.global portSAVE_CONTEXT
|
||||
.global portRESTORE_CONTEXT
|
||||
.global TIMER_CMP_INT
|
||||
.global vPortYield
|
||||
.global vTaskIncrementTick
|
||||
.global xExitStack
|
||||
.global freertos_risc_v_trap_handler
|
||||
.global pxPortInitialiseStack
|
||||
.extern pxCurrentTCB
|
||||
.extern ulPortTrapHandler
|
||||
.extern vTaskSwitchContext
|
||||
.extern xTaskIncrementTick
|
||||
.extern Timer_IRQHandler
|
||||
.extern pullMachineTimerCompareRegister
|
||||
.extern pullNextTime
|
||||
.extern uxTimerIncrementsForOneTick /* size_t type so 32-bit on 32-bit core and 64-bits on 64-bit core. */
|
||||
.extern xISRStackTop
|
||||
.extern portasmHANDLE_INTERRUPT
|
||||
|
||||
#define portCONTEXT_SIZE ( 30 * REGBYTES )
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
.align 8
|
||||
.func
|
||||
xPortStartFirstTask:
|
||||
|
||||
/* If there is a clint then interrupts can branch directly to the FreeRTOS
|
||||
trap handler. Otherwise the interrupt controller will need to be configured
|
||||
outside of this file. */
|
||||
la t0, freertos_risc_v_trap_handler
|
||||
csrw mtvec, t0
|
||||
|
||||
LOAD sp, pxCurrentTCB /* Load pxCurrentTCB. */
|
||||
LOAD sp, 0( sp ) /* Read sp from first TCB member. */
|
||||
|
||||
LOAD x1, 0( sp ) /* Note for starting the scheduler the exception return address is used as the function return address. */
|
||||
|
||||
// portasmRESTORE_ADDITIONAL_REGISTERS /* Defined in freertos_risc_v_chip_specific_extensions.h to restore any registers unique to the RISC-V implementation. */
|
||||
|
||||
LOAD t0, 29 * REGBYTES( sp ) /* mstatus */
|
||||
addi t0, t0, 0x08 /* Set MIE bit so the first task starts with interrupts enabled - required as returns with ret not eret. */
|
||||
csrrw x0, mstatus, t0 /* Interrupts enabled from here! */
|
||||
|
||||
LOAD x5, 2 * REGBYTES( sp ) /* t0 */
|
||||
LOAD x6, 3 * REGBYTES( sp ) /* t1 */
|
||||
LOAD x7, 4 * REGBYTES( sp ) /* t2 */
|
||||
LOAD x8, 5 * REGBYTES( sp ) /* s0/fp */
|
||||
LOAD x9, 6 * REGBYTES( sp ) /* s1 */
|
||||
LOAD x10, 7 * REGBYTES( sp ) /* a0 */
|
||||
LOAD x11, 8 * REGBYTES( sp ) /* a1 */
|
||||
LOAD x12, 9 * REGBYTES( sp ) /* a2 */
|
||||
LOAD x13, 10 * REGBYTES( sp ) /* a3 */
|
||||
LOAD x14, 11 * REGBYTES( sp ) /* a4 */
|
||||
LOAD x15, 12 * REGBYTES( sp ) /* a5 */
|
||||
LOAD x16, 13 * REGBYTES( sp ) /* a6 */
|
||||
LOAD x17, 14 * REGBYTES( sp ) /* a7 */
|
||||
LOAD x18, 15 * REGBYTES( sp ) /* s2 */
|
||||
LOAD x19, 16 * REGBYTES( sp ) /* s3 */
|
||||
LOAD x20, 17 * REGBYTES( sp ) /* s4 */
|
||||
LOAD x21, 18 * REGBYTES( sp ) /* s5 */
|
||||
LOAD x22, 19 * REGBYTES( sp ) /* s6 */
|
||||
LOAD x23, 20 * REGBYTES( sp ) /* s7 */
|
||||
LOAD x24, 21 * REGBYTES( sp ) /* s8 */
|
||||
LOAD x25, 22 * REGBYTES( sp ) /* s9 */
|
||||
LOAD x26, 23 * REGBYTES( sp ) /* s10 */
|
||||
LOAD x27, 24 * REGBYTES( sp ) /* s11 */
|
||||
LOAD x28, 25 * REGBYTES( sp ) /* t3 */
|
||||
LOAD x29, 26 * REGBYTES( sp ) /* t4 */
|
||||
LOAD x30, 27 * REGBYTES( sp ) /* t5 */
|
||||
LOAD x31, 28 * REGBYTES( sp ) /* t6 */
|
||||
addi sp, sp, portCONTEXT_SIZE
|
||||
ret
|
||||
.endfunc
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
.align 8
|
||||
.func
|
||||
freertos_risc_v_trap_handler:
|
||||
addi sp, sp, -portCONTEXT_SIZE
|
||||
STORE x1, 1 * REGBYTES( sp )
|
||||
STORE x5, 2 * REGBYTES( sp )
|
||||
STORE x6, 3 * REGBYTES( sp )
|
||||
STORE x7, 4 * REGBYTES( sp )
|
||||
STORE x8, 5 * REGBYTES( sp )
|
||||
STORE x9, 6 * REGBYTES( sp )
|
||||
STORE x10, 7 * REGBYTES( sp )
|
||||
STORE x11, 8 * REGBYTES( sp )
|
||||
STORE x12, 9 * REGBYTES( sp )
|
||||
STORE x13, 10 * REGBYTES( sp )
|
||||
STORE x14, 11 * REGBYTES( sp )
|
||||
STORE x15, 12 * REGBYTES( sp )
|
||||
STORE x16, 13 * REGBYTES( sp )
|
||||
STORE x17, 14 * REGBYTES( sp )
|
||||
STORE x18, 15 * REGBYTES( sp )
|
||||
STORE x19, 16 * REGBYTES( sp )
|
||||
STORE x20, 17 * REGBYTES( sp )
|
||||
STORE x21, 18 * REGBYTES( sp )
|
||||
STORE x22, 19 * REGBYTES( sp )
|
||||
STORE x23, 20 * REGBYTES( sp )
|
||||
STORE x24, 21 * REGBYTES( sp )
|
||||
STORE x25, 22 * REGBYTES( sp )
|
||||
STORE x26, 23 * REGBYTES( sp )
|
||||
STORE x27, 24 * REGBYTES( sp )
|
||||
STORE x28, 25 * REGBYTES( sp )
|
||||
STORE x29, 26 * REGBYTES( sp )
|
||||
STORE x30, 27 * REGBYTES( sp )
|
||||
STORE x31, 28 * REGBYTES( sp )
|
||||
store_x x1, 1 * portWORD_SIZE( sp )
|
||||
store_x x5, 2 * portWORD_SIZE( sp )
|
||||
store_x x6, 3 * portWORD_SIZE( sp )
|
||||
store_x x7, 4 * portWORD_SIZE( sp )
|
||||
store_x x8, 5 * portWORD_SIZE( sp )
|
||||
store_x x9, 6 * portWORD_SIZE( sp )
|
||||
store_x x10, 7 * portWORD_SIZE( sp )
|
||||
store_x x11, 8 * portWORD_SIZE( sp )
|
||||
store_x x12, 9 * portWORD_SIZE( sp )
|
||||
store_x x13, 10 * portWORD_SIZE( sp )
|
||||
store_x x14, 11 * portWORD_SIZE( sp )
|
||||
store_x x15, 12 * portWORD_SIZE( sp )
|
||||
store_x x16, 13 * portWORD_SIZE( sp )
|
||||
store_x x17, 14 * portWORD_SIZE( sp )
|
||||
store_x x18, 15 * portWORD_SIZE( sp )
|
||||
store_x x19, 16 * portWORD_SIZE( sp )
|
||||
store_x x20, 17 * portWORD_SIZE( sp )
|
||||
store_x x21, 18 * portWORD_SIZE( sp )
|
||||
store_x x22, 19 * portWORD_SIZE( sp )
|
||||
store_x x23, 20 * portWORD_SIZE( sp )
|
||||
store_x x24, 21 * portWORD_SIZE( sp )
|
||||
store_x x25, 22 * portWORD_SIZE( sp )
|
||||
store_x x26, 23 * portWORD_SIZE( sp )
|
||||
store_x x27, 24 * portWORD_SIZE( sp )
|
||||
store_x x28, 25 * portWORD_SIZE( sp )
|
||||
store_x x29, 26 * portWORD_SIZE( sp )
|
||||
store_x x30, 27 * portWORD_SIZE( sp )
|
||||
store_x x31, 28 * portWORD_SIZE( sp )
|
||||
|
||||
csrr t0, mstatus /* Required for MPIE bit. */
|
||||
STORE t0, 29 * REGBYTES( sp )
|
||||
store_x t0, 29 * portWORD_SIZE( sp )
|
||||
|
||||
// portasmSAVE_ADDITIONAL_REGISTERS /* Defined in freertos_risc_v_chip_specific_extensions.h to save any registers unique to the RISC-V implementation. */
|
||||
portasmSAVE_ADDITIONAL_REGISTERS /* Defined in freertos_risc_v_chip_specific_extensions.h to save any registers unique to the RISC-V implementation. */
|
||||
|
||||
LOAD t0, pxCurrentTCB /* Load pxCurrentTCB. */
|
||||
STORE sp, 0( t0 ) /* Write sp to first TCB member. */
|
||||
load_x t0, pxCurrentTCB /* Load pxCurrentTCB. */
|
||||
store_x sp, 0( t0 ) /* Write sp to first TCB member. */
|
||||
|
||||
csrr a0, mcause
|
||||
csrr a1, mepc
|
||||
|
||||
test_if_asynchronous:
|
||||
srli a2, a0, __riscv_xlen - 1 /* MSB of mcause is 1 if handing an asynchronous interrupt - shift to LSB to clear other bits. */
|
||||
beq a2, x0, handle_synchronous /* Branch past interrupt handing if not asynchronous. */
|
||||
store_x a1, 0( sp ) /* Asynch so save unmodified exception return address. */
|
||||
|
||||
/* Macro for saving task context */
|
||||
.macro portSAVE_CONTEXT
|
||||
.global pxCurrentTCB
|
||||
/* make room in stack */
|
||||
addi sp, sp, -REGBYTES * 32
|
||||
handle_asynchronous:
|
||||
|
||||
/* Save Context */
|
||||
STORE x1, 0x0(sp)
|
||||
STORE x2, 1 * REGBYTES(sp)
|
||||
STORE x3, 2 * REGBYTES(sp)
|
||||
STORE x4, 3 * REGBYTES(sp)
|
||||
STORE x5, 4 * REGBYTES(sp)
|
||||
STORE x6, 5 * REGBYTES(sp)
|
||||
STORE x7, 6 * REGBYTES(sp)
|
||||
STORE x8, 7 * REGBYTES(sp)
|
||||
STORE x9, 8 * REGBYTES(sp)
|
||||
STORE x10, 9 * REGBYTES(sp)
|
||||
STORE x11, 10 * REGBYTES(sp)
|
||||
STORE x12, 11 * REGBYTES(sp)
|
||||
STORE x13, 12 * REGBYTES(sp)
|
||||
STORE x14, 13 * REGBYTES(sp)
|
||||
STORE x15, 14 * REGBYTES(sp)
|
||||
STORE x16, 15 * REGBYTES(sp)
|
||||
STORE x17, 16 * REGBYTES(sp)
|
||||
STORE x18, 17 * REGBYTES(sp)
|
||||
STORE x19, 18 * REGBYTES(sp)
|
||||
STORE x20, 19 * REGBYTES(sp)
|
||||
STORE x21, 20 * REGBYTES(sp)
|
||||
STORE x22, 21 * REGBYTES(sp)
|
||||
STORE x23, 22 * REGBYTES(sp)
|
||||
STORE x24, 23 * REGBYTES(sp)
|
||||
STORE x25, 24 * REGBYTES(sp)
|
||||
STORE x26, 25 * REGBYTES(sp)
|
||||
STORE x27, 26 * REGBYTES(sp)
|
||||
STORE x28, 27 * REGBYTES(sp)
|
||||
STORE x29, 28 * REGBYTES(sp)
|
||||
STORE x30, 29 * REGBYTES(sp)
|
||||
STORE x31, 30 * REGBYTES(sp)
|
||||
#if( portasmHAS_MTIME != 0 )
|
||||
|
||||
/* Store current stackpointer in task control block (TCB) */
|
||||
LOAD t0, pxCurrentTCB //pointer
|
||||
STORE sp, 0x0(t0)
|
||||
.endm
|
||||
test_if_mtimer: /* If there is a CLINT then the mtimer is used to generate the tick interrupt. */
|
||||
|
||||
/* Saves current error program counter (EPC) as task program counter */
|
||||
.macro portSAVE_EPC
|
||||
csrr t0, mepc
|
||||
STORE t0, 31 * REGBYTES(sp)
|
||||
.endm
|
||||
addi t0, x0, 1
|
||||
|
||||
/* Saves current return adress (RA) as task program counter */
|
||||
.macro portSAVE_RA
|
||||
STORE ra, 31 * REGBYTES(sp)
|
||||
.endm
|
||||
slli t0, t0, __riscv_xlen - 1 /* LSB is already set, shift into MSB. Shift 31 on 32-bit or 63 on 64-bit cores. */
|
||||
addi t1, t0, 7 /* 0x8000[]0007 == machine timer interrupt. */
|
||||
bne a0, t1, test_if_external_interrupt
|
||||
|
||||
/* Macro for restoring task context */
|
||||
.macro portRESTORE_CONTEXT
|
||||
load_x t0, pullMachineTimerCompareRegister /* Load address of compare register into t0. */
|
||||
load_x t1, pullNextTime /* Load the address of ullNextTime into t1. */
|
||||
|
||||
.global pxCurrentTCB
|
||||
/* Load stack pointer from the current TCB */
|
||||
LOAD sp, pxCurrentTCB
|
||||
LOAD sp, 0x0(sp)
|
||||
#if( __riscv_xlen == 32 )
|
||||
|
||||
/* Load task program counter */
|
||||
LOAD t0, 31 * REGBYTES(sp)
|
||||
/* Update the 64-bit mtimer compare match value in two 32-bit writes. */
|
||||
li t4, -1
|
||||
lw t2, 0(t1) /* Load the low word of ullNextTime into t2. */
|
||||
lw t3, 4(t1) /* Load the high word of ullNextTime into t3. */
|
||||
sw t4, 0(t0) /* Low word no smaller than old value to start with - will be overwritten below. */
|
||||
sw t3, 4(t0) /* Store high word of ullNextTime into compare register. No smaller than new value. */
|
||||
sw t2, 0(t0) /* Store low word of ullNextTime into compare register. */
|
||||
lw t0, uxTimerIncrementsForOneTick /* Load the value of ullTimerIncrementForOneTick into t0 (could this be optimized by storing in an array next to pullNextTime?). */
|
||||
add t4, t0, t2 /* Add the low word of ullNextTime to the timer increments for one tick (assumes timer increment for one tick fits in 32-bits). */
|
||||
sltu t5, t4, t2 /* See if the sum of low words overflowed (what about the zero case?). */
|
||||
add t6, t3, t5 /* Add overflow to high word of ullNextTime. */
|
||||
sw t4, 0(t1) /* Store new low word of ullNextTime. */
|
||||
sw t6, 4(t1) /* Store new high word of ullNextTime. */
|
||||
|
||||
#endif /* __riscv_xlen == 32 */
|
||||
|
||||
#if( __riscv_xlen == 64 )
|
||||
|
||||
/* Update the 64-bit mtimer compare match value. */
|
||||
ld t2, 0(t1) /* Load ullNextTime into t2. */
|
||||
sd t2, 0(t0) /* Store ullNextTime into compare register. */
|
||||
ld t0, uxTimerIncrementsForOneTick /* Load the value of ullTimerIncrementForOneTick into t0 (could this be optimized by storing in an array next to pullNextTime?). */
|
||||
add t4, t0, t2 /* Add ullNextTime to the timer increments for one tick. */
|
||||
sd t4, 0(t1) /* Store ullNextTime. */
|
||||
|
||||
#endif /* __riscv_xlen == 64 */
|
||||
|
||||
load_x sp, xISRStackTop /* Switch to ISR stack before function call. */
|
||||
jal xTaskIncrementTick
|
||||
beqz a0, processed_source /* Don't switch context if incrementing tick didn't unblock a task. */
|
||||
jal vTaskSwitchContext
|
||||
j processed_source
|
||||
|
||||
test_if_external_interrupt: /* If there is a CLINT and the mtimer interrupt is not pending then check to see if an external interrupt is pending. */
|
||||
addi t1, t1, 4 /* 0x80000007 + 4 = 0x8000000b == Machine external interrupt. */
|
||||
bne a0, t1, as_yet_unhandled /* Something as yet unhandled. */
|
||||
|
||||
#endif /* portasmHAS_MTIME */
|
||||
|
||||
load_x sp, xISRStackTop /* Switch to ISR stack before function call. */
|
||||
jal portasmHANDLE_INTERRUPT /* Jump to the interrupt handler if there is no CLINT or if there is a CLINT and it has been determined that an external interrupt is pending. */
|
||||
j processed_source
|
||||
|
||||
handle_synchronous:
|
||||
addi a1, a1, 4 /* Synchronous so updated exception return address to the instruction after the instruction that generated the exeption. */
|
||||
store_x a1, 0( sp ) /* Save updated exception return address. */
|
||||
|
||||
test_if_environment_call:
|
||||
li t0, 11 /* 11 == environment call. */
|
||||
bne a0, t0, is_exception /* Not an M environment call, so some other exception. */
|
||||
load_x sp, xISRStackTop /* Switch to ISR stack before function call. */
|
||||
jal vTaskSwitchContext
|
||||
j processed_source
|
||||
|
||||
is_exception:
|
||||
csrr t0, mcause /* For viewing in the debugger only. */
|
||||
csrr t1, mepc /* For viewing in the debugger only */
|
||||
csrr t2, mstatus
|
||||
j is_exception /* No other exceptions handled yet. */
|
||||
|
||||
as_yet_unhandled:
|
||||
csrr t0, mcause /* For viewing in the debugger only. */
|
||||
j as_yet_unhandled
|
||||
|
||||
processed_source:
|
||||
load_x t1, pxCurrentTCB /* Load pxCurrentTCB. */
|
||||
load_x sp, 0( t1 ) /* Read sp from first TCB member. */
|
||||
|
||||
/* Load mret with the address of the next instruction in the task to run next. */
|
||||
load_x t0, 0( sp )
|
||||
csrw mepc, t0
|
||||
|
||||
/* Run in machine mode */
|
||||
li t0, MSTATUS_PRV1
|
||||
csrs mstatus, t0
|
||||
portasmRESTORE_ADDITIONAL_REGISTERS /* Defined in freertos_risc_v_chip_specific_extensions.h to restore any registers unique to the RISC-V implementation. */
|
||||
|
||||
/* Restore registers,
|
||||
Skip global pointer because that does not change */
|
||||
LOAD x1, 0x0(sp)
|
||||
LOAD x4, 3 * REGBYTES(sp)
|
||||
LOAD x5, 4 * REGBYTES(sp)
|
||||
LOAD x6, 5 * REGBYTES(sp)
|
||||
LOAD x7, 6 * REGBYTES(sp)
|
||||
LOAD x8, 7 * REGBYTES(sp)
|
||||
LOAD x9, 8 * REGBYTES(sp)
|
||||
LOAD x10, 9 * REGBYTES(sp)
|
||||
LOAD x11, 10 * REGBYTES(sp)
|
||||
LOAD x12, 11 * REGBYTES(sp)
|
||||
LOAD x13, 12 * REGBYTES(sp)
|
||||
LOAD x14, 13 * REGBYTES(sp)
|
||||
LOAD x15, 14 * REGBYTES(sp)
|
||||
LOAD x16, 15 * REGBYTES(sp)
|
||||
LOAD x17, 16 * REGBYTES(sp)
|
||||
LOAD x18, 17 * REGBYTES(sp)
|
||||
LOAD x19, 18 * REGBYTES(sp)
|
||||
LOAD x20, 19 * REGBYTES(sp)
|
||||
LOAD x21, 20 * REGBYTES(sp)
|
||||
LOAD x22, 21 * REGBYTES(sp)
|
||||
LOAD x23, 22 * REGBYTES(sp)
|
||||
LOAD x24, 23 * REGBYTES(sp)
|
||||
LOAD x25, 24 * REGBYTES(sp)
|
||||
LOAD x26, 25 * REGBYTES(sp)
|
||||
LOAD x27, 26 * REGBYTES(sp)
|
||||
LOAD x28, 27 * REGBYTES(sp)
|
||||
LOAD x29, 28 * REGBYTES(sp)
|
||||
LOAD x30, 29 * REGBYTES(sp)
|
||||
LOAD x31, 30 * REGBYTES(sp)
|
||||
/* Load mstatus with the interrupt enable bits used by the task. */
|
||||
load_x t0, 29 * portWORD_SIZE( sp )
|
||||
csrw mstatus, t0 /* Required for MPIE bit. */
|
||||
|
||||
load_x x1, 1 * portWORD_SIZE( sp )
|
||||
load_x x5, 2 * portWORD_SIZE( sp ) /* t0 */
|
||||
load_x x6, 3 * portWORD_SIZE( sp ) /* t1 */
|
||||
load_x x7, 4 * portWORD_SIZE( sp ) /* t2 */
|
||||
load_x x8, 5 * portWORD_SIZE( sp ) /* s0/fp */
|
||||
load_x x9, 6 * portWORD_SIZE( sp ) /* s1 */
|
||||
load_x x10, 7 * portWORD_SIZE( sp ) /* a0 */
|
||||
load_x x11, 8 * portWORD_SIZE( sp ) /* a1 */
|
||||
load_x x12, 9 * portWORD_SIZE( sp ) /* a2 */
|
||||
load_x x13, 10 * portWORD_SIZE( sp ) /* a3 */
|
||||
load_x x14, 11 * portWORD_SIZE( sp ) /* a4 */
|
||||
load_x x15, 12 * portWORD_SIZE( sp ) /* a5 */
|
||||
load_x x16, 13 * portWORD_SIZE( sp ) /* a6 */
|
||||
load_x x17, 14 * portWORD_SIZE( sp ) /* a7 */
|
||||
load_x x18, 15 * portWORD_SIZE( sp ) /* s2 */
|
||||
load_x x19, 16 * portWORD_SIZE( sp ) /* s3 */
|
||||
load_x x20, 17 * portWORD_SIZE( sp ) /* s4 */
|
||||
load_x x21, 18 * portWORD_SIZE( sp ) /* s5 */
|
||||
load_x x22, 19 * portWORD_SIZE( sp ) /* s6 */
|
||||
load_x x23, 20 * portWORD_SIZE( sp ) /* s7 */
|
||||
load_x x24, 21 * portWORD_SIZE( sp ) /* s8 */
|
||||
load_x x25, 22 * portWORD_SIZE( sp ) /* s9 */
|
||||
load_x x26, 23 * portWORD_SIZE( sp ) /* s10 */
|
||||
load_x x27, 24 * portWORD_SIZE( sp ) /* s11 */
|
||||
load_x x28, 25 * portWORD_SIZE( sp ) /* t3 */
|
||||
load_x x29, 26 * portWORD_SIZE( sp ) /* t4 */
|
||||
load_x x30, 27 * portWORD_SIZE( sp ) /* t5 */
|
||||
load_x x31, 28 * portWORD_SIZE( sp ) /* t6 */
|
||||
addi sp, sp, portCONTEXT_SIZE
|
||||
|
||||
addi sp, sp, REGBYTES * 32
|
||||
mret
|
||||
.endm
|
||||
.endfunc
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* Macro for restoring task context */
|
||||
TIMER_CMP_INT:
|
||||
portSAVE_CONTEXT
|
||||
portSAVE_EPC
|
||||
jal vPortSysTickHandler
|
||||
portRESTORE_CONTEXT
|
||||
.align 16
|
||||
.func
|
||||
xPortStartFirstTask:
|
||||
|
||||
#if( portasmHAS_SIFIVE_CLINT != 0 )
|
||||
/* If there is a clint then interrupts can branch directly to the FreeRTOS
|
||||
trap handler. Otherwise the interrupt controller will need to be configured
|
||||
outside of this file. */
|
||||
la t0, freertos_risc_v_trap_handler
|
||||
csrw mtvec, t0
|
||||
#endif /* portasmHAS_CLILNT */
|
||||
|
||||
vPortYield:
|
||||
/*
|
||||
* This routine can be called from outside of interrupt handler. This means
|
||||
* interrupts may be enabled at this point. This is probably okay for registers and
|
||||
* stack. However, "mepc" will be overwritten by the interrupt handler if a timer
|
||||
* interrupt happens during the yield. To avoid this, prevent interrupts before starting.
|
||||
* The write to mstatus in the restore context routine will enable interrupts after the
|
||||
* mret. A more fine-grain lock may be possible.
|
||||
load_x sp, pxCurrentTCB /* Load pxCurrentTCB. */
|
||||
load_x sp, 0( sp ) /* Read sp from first TCB member. */
|
||||
|
||||
load_x x1, 0( sp ) /* Note for starting the scheduler the exception return address is used as the function return address. */
|
||||
|
||||
portasmRESTORE_ADDITIONAL_REGISTERS /* Defined in freertos_risc_v_chip_specific_extensions.h to restore any registers unique to the RISC-V implementation. */
|
||||
|
||||
load_x t0, 29 * portWORD_SIZE( sp ) /* mstatus */
|
||||
addi t0, t0, 0x08 /* Set MIE bit so the first task starts with interrupts enabled - required as returns with ret not eret. */
|
||||
csrrw x0, mstatus, t0 /* Interrupts enabled from here! */
|
||||
|
||||
load_x x5, 2 * portWORD_SIZE( sp ) /* t0 */
|
||||
load_x x6, 3 * portWORD_SIZE( sp ) /* t1 */
|
||||
load_x x7, 4 * portWORD_SIZE( sp ) /* t2 */
|
||||
load_x x8, 5 * portWORD_SIZE( sp ) /* s0/fp */
|
||||
load_x x9, 6 * portWORD_SIZE( sp ) /* s1 */
|
||||
load_x x10, 7 * portWORD_SIZE( sp ) /* a0 */
|
||||
load_x x11, 8 * portWORD_SIZE( sp ) /* a1 */
|
||||
load_x x12, 9 * portWORD_SIZE( sp ) /* a2 */
|
||||
load_x x13, 10 * portWORD_SIZE( sp ) /* a3 */
|
||||
load_x x14, 11 * portWORD_SIZE( sp ) /* a4 */
|
||||
load_x x15, 12 * portWORD_SIZE( sp ) /* a5 */
|
||||
load_x x16, 13 * portWORD_SIZE( sp ) /* a6 */
|
||||
load_x x17, 14 * portWORD_SIZE( sp ) /* a7 */
|
||||
load_x x18, 15 * portWORD_SIZE( sp ) /* s2 */
|
||||
load_x x19, 16 * portWORD_SIZE( sp ) /* s3 */
|
||||
load_x x20, 17 * portWORD_SIZE( sp ) /* s4 */
|
||||
load_x x21, 18 * portWORD_SIZE( sp ) /* s5 */
|
||||
load_x x22, 19 * portWORD_SIZE( sp ) /* s6 */
|
||||
load_x x23, 20 * portWORD_SIZE( sp ) /* s7 */
|
||||
load_x x24, 21 * portWORD_SIZE( sp ) /* s8 */
|
||||
load_x x25, 22 * portWORD_SIZE( sp ) /* s9 */
|
||||
load_x x26, 23 * portWORD_SIZE( sp ) /* s10 */
|
||||
load_x x27, 24 * portWORD_SIZE( sp ) /* s11 */
|
||||
load_x x28, 25 * portWORD_SIZE( sp ) /* t3 */
|
||||
load_x x29, 26 * portWORD_SIZE( sp ) /* t4 */
|
||||
load_x x30, 27 * portWORD_SIZE( sp ) /* t5 */
|
||||
load_x x31, 28 * portWORD_SIZE( sp ) /* t6 */
|
||||
addi sp, sp, portCONTEXT_SIZE
|
||||
ret
|
||||
.endfunc
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
* Unlike other ports pxPortInitialiseStack() is written in assembly code as it
|
||||
* needs access to the portasmADDITIONAL_CONTEXT_SIZE constant. The prototype
|
||||
* for the function is as per the other ports:
|
||||
* StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters );
|
||||
*
|
||||
* As per the standard RISC-V ABI pxTopcOfStack is passed in in a0, pxCode in
|
||||
* a1, and pvParameters in a2. The new top of stack is passed out in a0.
|
||||
*
|
||||
* RISC-V maps registers to ABI names as follows (X1 to X31 integer registers
|
||||
* for the 'I' profile, X1 to X15 for the 'E' profile, currently I assumed).
|
||||
*
|
||||
* Register ABI Name Description Saver
|
||||
* x0 zero Hard-wired zero -
|
||||
* x1 ra Return address Caller
|
||||
* x2 sp Stack pointer Callee
|
||||
* x3 gp Global pointer -
|
||||
* x4 tp Thread pointer -
|
||||
* x5-7 t0-2 Temporaries Caller
|
||||
* x8 s0/fp Saved register/Frame pointer Callee
|
||||
* x9 s1 Saved register Callee
|
||||
* x10-11 a0-1 Function Arguments/return values Caller
|
||||
* x12-17 a2-7 Function arguments Caller
|
||||
* x18-27 s2-11 Saved registers Callee
|
||||
* x28-31 t3-6 Temporaries Caller
|
||||
*
|
||||
* The RISC-V context is saved t FreeRTOS tasks in the following stack frame,
|
||||
* where the global and thread pointers are currently assumed to be constant so
|
||||
* are not saved:
|
||||
*
|
||||
* mstatus
|
||||
* x31
|
||||
* x30
|
||||
* x29
|
||||
* x28
|
||||
* x27
|
||||
* x26
|
||||
* x25
|
||||
* x24
|
||||
* x23
|
||||
* x22
|
||||
* x21
|
||||
* x20
|
||||
* x19
|
||||
* x18
|
||||
* x17
|
||||
* x16
|
||||
* x15
|
||||
* x14
|
||||
* x13
|
||||
* x12
|
||||
* x11
|
||||
* pvParameters
|
||||
* x9
|
||||
* x8
|
||||
* x7
|
||||
* x6
|
||||
* x5
|
||||
* portTASK_RETURN_ADDRESS
|
||||
* [chip specific registers go here]
|
||||
* pxCode
|
||||
*/
|
||||
csrci mstatus, 8
|
||||
.align 8
|
||||
.func
|
||||
pxPortInitialiseStack:
|
||||
|
||||
portSAVE_CONTEXT
|
||||
portSAVE_RA
|
||||
jal vTaskSwitchContext
|
||||
portRESTORE_CONTEXT
|
||||
csrr t0, mstatus /* Obtain current mstatus value. */
|
||||
addi t1, x0, 0x188 /* Generate the value 0x1880, which are the MPIE and MPP bits to set in mstatus. */
|
||||
slli t1, t1, 4
|
||||
or t0, t0, t1 /* Set MPIE and MPP bits in mstatus value. */
|
||||
|
||||
addi a0, a0, -portWORD_SIZE
|
||||
store_x t0, 0(a0) /* mstatus onto the stack. */
|
||||
addi a0, a0, -(22 * portWORD_SIZE) /* Space for registers x11-x31. */
|
||||
store_x a2, 0(a0) /* Task parameters (pvParameters parameter) goes into register X10/a0 on the stack. */
|
||||
addi a0, a0, -(6 * portWORD_SIZE) /* Space for registers x5-x9. */
|
||||
store_x x0, 0(a0) /* Return address onto the stack, could be portTASK_RETURN_ADDRESS */
|
||||
addi t0, x0, portasmADDITIONAL_CONTEXT_SIZE /* The number of chip specific additional registers. */
|
||||
chip_specific_stack_frame: /* First add any chip specific registers to the stack frame being created. */
|
||||
beq t0, x0, 1f /* No more chip specific registers to save. */
|
||||
addi a0, a0, -portWORD_SIZE /* Make space for chip specific register. */
|
||||
store_x x0, 0(a0) /* Give the chip specific register an initial value of zero. */
|
||||
addi t0, t0, -1 /* Decrement the count of chip specific registers remaining. */
|
||||
j chip_specific_stack_frame /* Until no more chip specific registers. */
|
||||
1:
|
||||
addi a0, a0, -portWORD_SIZE
|
||||
store_x a1, 0(a0) /* mret value (pxCode parameter) onto the stack. */
|
||||
ret
|
||||
.endfunc
|
||||
/*-----------------------------------------------------------*/
|
||||
|
|
|
|||
|
|
@ -2,22 +2,23 @@
|
|||
* FreeRTOS Kernel V10.3.1
|
||||
* Copyright (C) 2020 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:
|
||||
* 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 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.
|
||||
* 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
|
||||
|
|
@ -25,12 +26,12 @@
|
|||
* 1 tab == 4 spaces!
|
||||
*/
|
||||
|
||||
|
||||
#ifndef PORTMACRO_H
|
||||
#define PORTMACRO_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
extern "C"
|
||||
{
|
||||
#endif
|
||||
|
||||
/*-----------------------------------------------------------
|
||||
|
|
@ -45,25 +46,24 @@ extern "C" {
|
|||
|
||||
/* Type definitions. */
|
||||
#if __riscv_xlen == 64
|
||||
#define portSTACK_TYPE uint64_t
|
||||
#define portBASE_TYPE int64_t
|
||||
#define portUBASE_TYPE uint64_t
|
||||
#define portMAX_DELAY ( TickType_t ) 0xffffffffffffffffUL
|
||||
#define portPOINTER_SIZE_TYPE uint64_t
|
||||
#define portSTACK_TYPE uint64_t
|
||||
#define portBASE_TYPE int64_t
|
||||
#define portUBASE_TYPE uint64_t
|
||||
#define portMAX_DELAY (TickType_t)0xffffffffffffffffUL
|
||||
#define portPOINTER_SIZE_TYPE uint64_t
|
||||
#elif __riscv_xlen == 32
|
||||
#define portSTACK_TYPE uint32_t
|
||||
#define portBASE_TYPE int32_t
|
||||
#define portUBASE_TYPE uint32_t
|
||||
#define portMAX_DELAY ( TickType_t ) 0xffffffffUL
|
||||
#define portSTACK_TYPE uint32_t
|
||||
#define portBASE_TYPE int32_t
|
||||
#define portUBASE_TYPE uint32_t
|
||||
#define portMAX_DELAY (TickType_t)0xffffffffUL
|
||||
#else
|
||||
#error Assembler did not define __riscv_xlen
|
||||
#error Assembler did not define __riscv_xlen
|
||||
#endif
|
||||
|
||||
|
||||
typedef portSTACK_TYPE StackType_t;
|
||||
typedef portBASE_TYPE BaseType_t;
|
||||
typedef portUBASE_TYPE UBaseType_t;
|
||||
typedef portUBASE_TYPE TickType_t;
|
||||
typedef portSTACK_TYPE StackType_t;
|
||||
typedef portBASE_TYPE BaseType_t;
|
||||
typedef portUBASE_TYPE UBaseType_t;
|
||||
typedef portUBASE_TYPE TickType_t;
|
||||
|
||||
/* Legacy type definitions. */
|
||||
#define portCHAR char
|
||||
|
|
@ -78,34 +78,34 @@ not need to be guarded with a critical section. */
|
|||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* Architecture specifics. */
|
||||
#define portSTACK_GROWTH ( -1 )
|
||||
#define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
|
||||
#define portSTACK_GROWTH (-1)
|
||||
#define portTICK_PERIOD_MS ((TickType_t)1000 / configTICK_RATE_HZ)
|
||||
#ifdef __riscv64
|
||||
#error This is the RV32 port that has not yet been adapted for 64.
|
||||
#define portBYTE_ALIGNMENT 16
|
||||
#error This is the RV32 port that has not yet been adapted for 64.
|
||||
#define portBYTE_ALIGNMENT 16
|
||||
#else
|
||||
#define portBYTE_ALIGNMENT 16
|
||||
#define portBYTE_ALIGNMENT 16
|
||||
#endif
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* Scheduler utilities. */
|
||||
extern void vTaskSwitchContext(void);
|
||||
#define portYIELD() __asm volatile("ecall");
|
||||
#define portEND_SWITCHING_ISR(xSwitchRequired) \
|
||||
if (xSwitchRequired) vTaskSwitchContext()
|
||||
#define portYIELD_FROM_ISR(x) portEND_SWITCHING_ISR(x)
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
|
||||
/* Scheduler utilities. */
|
||||
extern void vTaskSwitchContext( void );
|
||||
#define portYIELD() __asm volatile( "ecall" );
|
||||
#define portEND_SWITCHING_ISR( xSwitchRequired ) if( xSwitchRequired ) vTaskSwitchContext()
|
||||
#define portYIELD_FROM_ISR( x ) portEND_SWITCHING_ISR( x )
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
|
||||
/* Critical section management. */
|
||||
#define portCRITICAL_NESTING_IN_TCB 1
|
||||
extern void vTaskEnterCritical( void );
|
||||
extern void vTaskExitCritical( void );
|
||||
extern void vTaskEnterCritical(void);
|
||||
extern void vTaskExitCritical(void);
|
||||
|
||||
#define portSET_INTERRUPT_MASK_FROM_ISR() 0
|
||||
#define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedStatusValue ) ( void ) uxSavedStatusValue
|
||||
#define portDISABLE_INTERRUPTS() __asm volatile( "csrc mstatus, 8" )
|
||||
#define portENABLE_INTERRUPTS() __asm volatile( "csrs mstatus, 8" )
|
||||
#define portCLEAR_INTERRUPT_MASK_FROM_ISR(uxSavedStatusValue) \
|
||||
(void)uxSavedStatusValue
|
||||
#define portDISABLE_INTERRUPTS() __asm volatile("csrc mstatus, 8")
|
||||
#define portENABLE_INTERRUPTS() __asm volatile("csrs mstatus, 8")
|
||||
#define portENTER_CRITICAL() vTaskEnterCritical()
|
||||
#define portEXIT_CRITICAL() vTaskExitCritical()
|
||||
|
||||
|
|
@ -113,74 +113,76 @@ extern void vTaskExitCritical( void );
|
|||
|
||||
/* Architecture specific optimisations. */
|
||||
#ifndef configUSE_PORT_OPTIMISED_TASK_SELECTION
|
||||
#define configUSE_PORT_OPTIMISED_TASK_SELECTION 1
|
||||
#define configUSE_PORT_OPTIMISED_TASK_SELECTION 1
|
||||
#endif
|
||||
|
||||
#if( configUSE_PORT_OPTIMISED_TASK_SELECTION == 1 )
|
||||
#if (configUSE_PORT_OPTIMISED_TASK_SELECTION == 1)
|
||||
|
||||
/* Check the configuration. */
|
||||
#if( configMAX_PRIORITIES > 32 )
|
||||
#error configUSE_PORT_OPTIMISED_TASK_SELECTION can only be set to 1 when configMAX_PRIORITIES is less than or equal to 32. It is very rare that a system requires more than 10 to 15 difference priorities as tasks that share a priority will time slice.
|
||||
#endif
|
||||
/* Check the configuration. */
|
||||
#if (configMAX_PRIORITIES > 32)
|
||||
#error configUSE_PORT_OPTIMISED_TASK_SELECTION can only be set to 1 when configMAX_PRIORITIES is less than or equal to 32. It is very rare that a system requires more than 10 to 15 difference priorities as tasks that share a priority will time slice.
|
||||
#endif
|
||||
|
||||
/* Store/clear the ready priorities in a bit map. */
|
||||
#define portRECORD_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) |= ( 1UL << ( uxPriority ) )
|
||||
#define portRESET_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) &= ~( 1UL << ( uxPriority ) )
|
||||
/* Store/clear the ready priorities in a bit map. */
|
||||
#define portRECORD_READY_PRIORITY(uxPriority, uxReadyPriorities) \
|
||||
(uxReadyPriorities) |= (1UL << (uxPriority))
|
||||
#define portRESET_READY_PRIORITY(uxPriority, uxReadyPriorities) \
|
||||
(uxReadyPriorities) &= ~(1UL << (uxPriority))
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
#define portGET_HIGHEST_PRIORITY( uxTopPriority, uxReadyPriorities ) uxTopPriority = ( 31UL - __builtin_clz( uxReadyPriorities ) )
|
||||
#define portGET_HIGHEST_PRIORITY(uxTopPriority, uxReadyPriorities) \
|
||||
uxTopPriority = (31UL - __builtin_clz(uxReadyPriorities))
|
||||
|
||||
#endif /* configUSE_PORT_OPTIMISED_TASK_SELECTION */
|
||||
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* Task function macros as described on the FreeRTOS.org WEB site. These are
|
||||
not necessary for to use this port. They are defined so the common demo files
|
||||
(which build with all the ports) will build. */
|
||||
#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
|
||||
#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
|
||||
#define portTASK_FUNCTION_PROTO(vFunction, pvParameters) \
|
||||
void vFunction(void *pvParameters)
|
||||
#define portTASK_FUNCTION(vFunction, pvParameters) \
|
||||
void vFunction(void *pvParameters)
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
#define portNOP() __asm volatile ( " nop " )
|
||||
#define portNOP() __asm volatile(" nop ")
|
||||
|
||||
#define portINLINE __inline
|
||||
|
||||
#ifndef portFORCE_INLINE
|
||||
#define portFORCE_INLINE inline __attribute__(( always_inline))
|
||||
#define portFORCE_INLINE inline __attribute__((always_inline))
|
||||
#endif
|
||||
|
||||
#define portMEMORY_BARRIER() __asm volatile( "" ::: "memory" )
|
||||
#define portMEMORY_BARRIER() __asm volatile("" ::: "memory")
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
|
||||
/* configCLINT_BASE_ADDRESS is a legacy definition that was replaced by the
|
||||
configMTIME_BASE_ADDRESS and configMTIMECMP_BASE_ADDRESS definitions. For
|
||||
backward compatibility derive the newer definitions from the old if the old
|
||||
definition is found. */
|
||||
#if defined( configCLINT_BASE_ADDRESS ) && !defined( configMTIME_BASE_ADDRESS ) && ( configCLINT_BASE_ADDRESS == 0 )
|
||||
/* Legacy case where configCLINT_BASE_ADDRESS was defined as 0 to indicate
|
||||
there was no CLINT. Equivalent now is to set the MTIME and MTIMECMP
|
||||
addresses to 0. */
|
||||
#define configMTIME_BASE_ADDRESS ( 0 )
|
||||
#define configMTIMECMP_BASE_ADDRESS ( 0 )
|
||||
#elif defined( configCLINT_BASE_ADDRESS ) && !defined( configMTIME_BASE_ADDRESS )
|
||||
/* Legacy case where configCLINT_BASE_ADDRESS was set to the base address of
|
||||
the CLINT. Equivalent now is to derive the MTIME and MTIMECMP addresses
|
||||
from the CLINT address. */
|
||||
#define configMTIME_BASE_ADDRESS ( ( configCLINT_BASE_ADDRESS ) + 0xBFF8UL )
|
||||
#define configMTIMECMP_BASE_ADDRESS ( ( configCLINT_BASE_ADDRESS ) + 0x4000UL )
|
||||
#elif !defined( configMTIME_BASE_ADDRESS ) || !defined( configMTIMECMP_BASE_ADDRESS )
|
||||
#error configMTIME_BASE_ADDRESS and configMTIMECMP_BASE_ADDRESS must be defined in FreeRTOSConfig.h. Set them to zero if there is no MTIME (machine time) clock. See https://www.freertos.org/Using-FreeRTOS-on-RISC-V.html
|
||||
#if defined(configCLINT_BASE_ADDRESS) && !defined(configMTIME_BASE_ADDRESS) && \
|
||||
(configCLINT_BASE_ADDRESS == 0)
|
||||
/* Legacy case where configCLINT_BASE_ADDRESS was defined as 0 to indicate
|
||||
there was no CLINT. Equivalent now is to set the MTIME and MTIMECMP
|
||||
addresses to 0. */
|
||||
#define configMTIME_BASE_ADDRESS (0)
|
||||
#define configMTIMECMP_BASE_ADDRESS (0)
|
||||
#elif defined(configCLINT_BASE_ADDRESS) && !defined(configMTIME_BASE_ADDRESS)
|
||||
/* Legacy case where configCLINT_BASE_ADDRESS was set to the base address of
|
||||
the CLINT. Equivalent now is to derive the MTIME and MTIMECMP addresses
|
||||
from the CLINT address. */
|
||||
#define configMTIME_BASE_ADDRESS ((configCLINT_BASE_ADDRESS) + 0xBFF8UL)
|
||||
#define configMTIMECMP_BASE_ADDRESS ((configCLINT_BASE_ADDRESS) + 0x4000UL)
|
||||
#elif !defined(configMTIME_BASE_ADDRESS) || \
|
||||
!defined(configMTIMECMP_BASE_ADDRESS)
|
||||
#error configMTIME_BASE_ADDRESS and configMTIMECMP_BASE_ADDRESS must be defined in FreeRTOSConfig.h. Set them to zero if there is no MTIME (machine time) clock. See https://www.freertos.org/Using-FreeRTOS-on-RISC-V.html
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* PORTMACRO_H */
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue