Add CC-RH port for Renesas F1Kx devices (#1100)
Add CC-RH port for Renesas F1Kx devicespull/1116/head
Trong Nguyen
8 months ago
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GitHub
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# RH850/F1K and F1Kx FreeRTOS Port with CC-RH Compiler
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## Introduction
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This repository contains the port of FreeRTOS for Renesas RH850/F1K and F1Kx microcontrollers using the CC-RH compiler. The following sections provide instructions on how to use this port, a link to the test project, and other relevant information.
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## Prerequisites
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- Compiler: CC-RH
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- FreeRTOS version 11.1.0
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| Device | FPU | SMP |
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|----------|-----|-----|
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| F1K | Yes | No |
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| F1KM-S1 | Yes | No |
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| F1KM-S2 | Yes | No |
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| F1KM-S4 | Yes | No |
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| F1KH-D8 | Yes | Yes |
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## Link to Test Project
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The test project can be found [here](https://github.com/FreeRTOS/FreeRTOS-Community-Supported-Demos) (`RH850_F1Kx_CCRH`). This project contains example tasks and configurations to help you get started with FreeRTOS on the RH850/F1K and F1Kx.
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## Note
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1. Configure IPIR Interrupt: Ensure that the bit specifying the destination for binding (requesting) an interrupt is enabled (e.g: IBDxxx register of F1KH-D8) (1)
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2. `Channel 0` and address `0xFFFEEC00` are used as default configuration for configIPIR_CHANNEL and configEXCLUSIVE_ADDRESS, in case of resource confliction other channel/address can be used. (2)
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3. The minimal stack size (configMINIMAL_STACK_SIZE) must be included the reserved memory for nested interrupt. This formula can be referred: `(task_context_size) * (1 + configMAX_INT_NESTING) + Stack_depth_of_taskcode`
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In which, `task_context_size` is calculated as `36*4bytes = 144bytes` (when FPU enabled) or `34*4bytes = 136` (when FPU disabled), configMAX_INT_NESTING is 02 as default.
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4. `configTIMER_PRESCALE`: This value is required in order to correctly configure clock for `CPUCLK_L`. Refer to Hardware Manual at `Table 44.22` for `option byte`: If the user sets the option byte `CKDIVMD to 1`, then `configTIMER_PRESCALE = 4`. Otherwise, if `CKDIVMD is set to 0`, then `configTIMER_PRESCALE = 2`.
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(1) This is applicable for F1KH-D8 with SMP only.
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(2) This is optional and applicable for SMP only.
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## Other Relevant Information
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- **Documentation:**
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- Refer to the official [FreeRTOS documentation](https://www.freertos.org/Documentation/RTOS_book.html) for detailed information on configuring and using FreeRTOS.
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- Consult the [RH850 F1K group user manual hardware manual](https://www.renesas.com/us/en/document/mah/rh850f1k-group-users-manual-hardware?r=1170166) for specific details about the microcontroller.
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- For more information about Renesas RH850/F1K and F1Kx, please visit [this website](https://www.renesas.com/us/en/products/microcontrollers-microprocessors/rh850-automotive-mcus)
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- The CC-RH compiler can be downloaded [here](https://www.renesas.com/us/en/software-tool/c-compiler-package-rh850-family#downloads)
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- **Support:**
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- If you encounter any issues or have questions about this port, please open an issue in this repository or contact the maintainer.
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- **Contributing:**
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- Contributions to improve this port are welcome. Please fork the repository, make your changes, and submit a pull request.
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/*
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* FreeRTOS Kernel <DEVELOPMENT BRANCH>
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* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* SPDX-License-Identifier: MIT
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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.
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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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* https://www.FreeRTOS.org
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* https://github.com/FreeRTOS
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*
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*/
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/* Scheduler includes. */
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#include "FreeRTOS.h"
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#include "task.h"
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/* This port uses xTaskGetCurrentTaskHandle to get TCB stack, it is required to
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* enable this API. */
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#if ( ( INCLUDE_xTaskGetCurrentTaskHandle != 1 ) && ( configNUMBER_OF_CORES == 1 ) )
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#error INCLUDE_xTaskGetCurrentTaskHandle must be set to 1 in single core.
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#endif
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/***********************************************************
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* Macro definitions
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***********************************************************/
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/* Hardware specific macros */
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#define portPSW_REGISTER_ID ( 5 )
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#define portFPSR_REGISTER_ID ( 6 )
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/* PSW.EBV and PSW.CUx bits are kept as current status */
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#define portINITIAL_PSW_MASK ( 0x000f8000 )
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#define portCURRENT_PSW_VALUE ( portSTSR( portPSW_REGISTER_ID ) )
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#define portCURRENT_SR_ZERO_VALUE ( ( StackType_t ) 0x00000000 )
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#define portCURRENT_FPSR_VALUE ( portSTSR( portFPSR_REGISTER_ID ) )
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/* Mask for FPU configuration bits (FN, PEM, RM, FS) */
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#define portINITIAL_FPSR_MASK ( 0x00ae0000 )
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#define portPSW_ID_MASK ( 0x00000020 )
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/* Define necessary hardware IO for OSTM timer. OSTM0 is used by default as
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* it is common for almost device variants. If it conflicts with application,
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* the application shall implement another timer.*/
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#define portOSTM_EIC_ADDR ( 0xFFFFB0A8 )
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#define portOSTM0CMP_ADDR ( 0xFFD70000 )
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#define portOSTM0CTL_ADDR ( 0xFFD70020 )
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#define portOSTM0TS_ADDR ( 0xFFD70014 )
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#if ( configNUMBER_OF_CORES > 1 )
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/* IPIR base address, the peripheral is used for Inter-Processor communication
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* Hardware supports 4 channels which is offset by 0x0, 0x4, 0x8, 0xC bytes from
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* base address. By default, channel 0 is selected. */
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#ifdef configIPIR_CHANNEL
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#define portIPIR_BASE_ADDR ( ( 0xFFFEEC80 ) + ( configIPIR_CHANNEL << 2 ) )
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#else
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#define portIPIR_BASE_ADDR ( 0xFFFEEC80 )
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#endif
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/* Address used for exclusive control for variable shared between PEs
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* (common resources), each CPU cores have independent access path to
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* this address. By default, G0MEV0 register is selected*/
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#ifdef configEXCLUSIVE_ADDRESS
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#define portMEV_BASE_ADDR configEXCLUSIVE_ADDRESS
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#else
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#define portMEV_BASE_ADDR ( 0xFFFEEC00 )
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#endif
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#endif /* if ( configNUMBER_OF_CORES > 1 ) */
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/* Macros required to set up the initial stack. */
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#define portSTACK_INITIAL_VALUE_R1 ( ( StackType_t ) 0x01010101 )
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#define portSTACK_INITIAL_VALUE_R2 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x02 )
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#define portSTACK_INITIAL_VALUE_R3 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x03 )
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#define portSTACK_INITIAL_VALUE_R4 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x04 )
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#define portSTACK_INITIAL_VALUE_R5 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x05 )
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#define portSTACK_INITIAL_VALUE_R6 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x06 )
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#define portSTACK_INITIAL_VALUE_R7 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x07 )
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#define portSTACK_INITIAL_VALUE_R8 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x08 )
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#define portSTACK_INITIAL_VALUE_R9 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x09 )
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#define portSTACK_INITIAL_VALUE_R10 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x10 )
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#define portSTACK_INITIAL_VALUE_R11 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x11 )
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#define portSTACK_INITIAL_VALUE_R12 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x12 )
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#define portSTACK_INITIAL_VALUE_R13 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x13 )
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#define portSTACK_INITIAL_VALUE_R14 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x14 )
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#define portSTACK_INITIAL_VALUE_R15 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x15 )
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#define portSTACK_INITIAL_VALUE_R16 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x16 )
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#define portSTACK_INITIAL_VALUE_R17 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x17 )
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#define portSTACK_INITIAL_VALUE_R18 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x18 )
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#define portSTACK_INITIAL_VALUE_R19 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x19 )
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#define portSTACK_INITIAL_VALUE_R20 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x20 )
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#define portSTACK_INITIAL_VALUE_R21 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x21 )
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#define portSTACK_INITIAL_VALUE_R22 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x22 )
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#define portSTACK_INITIAL_VALUE_R23 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x23 )
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#define portSTACK_INITIAL_VALUE_R24 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x24 )
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#define portSTACK_INITIAL_VALUE_R25 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x25 )
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#define portSTACK_INITIAL_VALUE_R26 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x26 )
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#define portSTACK_INITIAL_VALUE_R27 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x27 )
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#define portSTACK_INITIAL_VALUE_R28 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x28 )
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#define portSTACK_INITIAL_VALUE_R29 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x29 )
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#define portSTACK_INITIAL_VALUE_R30 ( ( StackType_t ) portSTACK_INITIAL_VALUE_R1 * 0x30 )
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/***********************************************************
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* Typedef definitions
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***********************************************************/
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/* OSTM Count Start Trigger Register (OSTMnTS) */
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#define portOSTM_COUNTER_START ( 0x01U ) /* Starts the counter */
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/* OSTM Count Stop Trigger Register (OSTMnTT) */
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#define portOSTM_COUNTER_STOP ( 0x01U ) /* Stops the counter */
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/* OSTM Control Register (OSTMnCTL) */
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#define portOSTM_MODE_INTERVAL_TIMER ( 0x00U )
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#define portOSTM_MODE_FREE_RUNNING ( 0x02U )
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/* Disables or Enable the interrupts when counting starts */
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#define portOSTM_START_INTERRUPT_DISABLE ( 0x00U )
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#define portOSTM_START_INTERRUPT_ENABLE ( 0x01U )
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/* Interrupt vector method select (TBxxx) */
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#define portINT_DIRECT_VECTOR ( 0x0U )
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#define portINT_TABLE_VECTOR ( 0x1U )
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/* Interrupt mask (MKxxx) */
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#define portINT_PROCESSING_ENABLED ( 0x0U )
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#define portINT_PROCESSING_DISABLED ( 0x1U )
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/* Specify 16 interrupt priority levels */
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#define portINT_PRIORITY_HIGHEST ( 0x0000U ) /* Level 0 (highest) */
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#define portINT_PRIORITY_LEVEL1 ( 0x0001U ) /* Level 1 */
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#define portINT_PRIORITY_LEVEL2 ( 0x0002U ) /* Level 2 */
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#define portINT_PRIORITY_LEVEL3 ( 0x0003U ) /* Level 3 */
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#define portINT_PRIORITY_LEVEL4 ( 0x0004U ) /* Level 4 */
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#define portINT_PRIORITY_LEVEL5 ( 0x0005U ) /* Level 5 */
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#define portINT_PRIORITY_LEVEL6 ( 0x0006U ) /* Level 6 */
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#define portINT_PRIORITY_LEVEL7 ( 0x0007U ) /* Level 7 */
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#define portINT_PRIORITY_LEVEL8 ( 0x0008U ) /* Level 8 */
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#define portINT_PRIORITY_LEVEL9 ( 0x0009U ) /* Level 9 */
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#define portINT_PRIORITY_LEVEL10 ( 0x000AU ) /* Level 10 */
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#define portINT_PRIORITY_LEVEL11 ( 0x000BU ) /* Level 11 */
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#define portINT_PRIORITY_LEVEL12 ( 0x000CU ) /* Level 12 */
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#define portINT_PRIORITY_LEVEL13 ( 0x000DU ) /* Level 13 */
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#define portINT_PRIORITY_LEVEL14 ( 0x000EU ) /* Level 14 */
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#define portINT_PRIORITY_LOWEST ( 0x000FU ) /* Level 15 (lowest) */
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/* Macros indicating status of scheduler request */
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#define PORT_SCHEDULER_NOREQUEST 0UL
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#define PORT_SCHEDULER_TASKSWITCH 1UL /* Do not modify */
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#define PORT_SCHEDULER_STARTFIRSTTASK 2UL /* Do not modify */
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#ifndef configSETUP_TICK_INTERRUPT
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/* The user has not provided their own tick interrupt configuration so use
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* the definition in this file (which uses the interval timer). */
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#define configSETUP_TICK_INTERRUPT() prvSetupTimerInterrupt()
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#endif /* configSETUP_TICK_INTERRUPT */
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#ifndef configMAX_INT_NESTING
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/* Set the default value for depth of nested interrupt. In theory, the
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* microcontroller have mechanism to limit number of nested level of interrupt
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* by priority (maximum 16 levels). However, the large stack memory should be
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* prepared for each task to save resource in interrupt handler. Therefore, it
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* is necessary to limit depth of nesting interrupt to optimize memory usage.
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* In addition, the execution time of interrupt handler should be very short
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* (typically not exceed 20us), this constraint does not impact to system.
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*/
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#define configMAX_INT_NESTING 2UL
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#endif
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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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* Sets up the periodic ISR used for the RTOS tick using the OSTM.
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* The application writer can define configSETUP_TICK_INTERRUPT() (in
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* FreeRTOSConfig.h) such that their own tick interrupt configuration is used
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* in place of prvSetupTimerInterrupt().
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*/
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static void prvSetupTimerInterrupt( void );
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#if ( configNUMBER_OF_CORES > 1 )
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/*
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* Functions implement spin-lock between cores by atomic accesses to Exclusive
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* Control Register (G0MEVm). There are separated access path between CPU cores,
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* but they should wait if access to same register
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*/
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static void prvExclusiveLock( BaseType_t xFromIsr );
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static void prvExclusiveRelease( BaseType_t xFromIsr );
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#endif
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/*
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* Function to start the first task executing
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*/
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extern void vPortStartFirstTask( void );
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/* Scheduler request on each cores which are starting first task and switching
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* context */
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volatile BaseType_t xPortScheduleStatus[ configNUMBER_OF_CORES ] = { 0 };
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/* Counts the interrupt nesting depth. A context switch is only performed if
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* the nesting depth is 0. In addition, the interrupt shares same stack
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* allocated for each tasks. With supporting nesting interrupt, the stack
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* may be overflowed.
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* It is necessary to control maximum stack depth.
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*/
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volatile UBaseType_t uxInterruptNesting[ configNUMBER_OF_CORES ] = { 0 };
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volatile const UBaseType_t uxPortMaxInterruptDepth = configMAX_INT_NESTING - 1;
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/* Count number of nested locks by same cores. The lock is completely released
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* only if this count is decreased to 0, the lock is separated for task
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* and isr */
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UBaseType_t uxLockNesting[ configNUMBER_OF_CORES ][ 2 ] = { 0 };
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#if ( configNUMBER_OF_CORES > 1 )
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/* Pointer to exclusive access memory */
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volatile BaseType_t * pxPortExclusiveReg = ( volatile BaseType_t * ) ( portMEV_BASE_ADDR );
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#endif
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/* Interrupt handler for OSTM timer which handling tick increment and resulting
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* to switch context. */
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void vPortTickISR( void );
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#if ( configNUMBER_OF_CORES > 1 )
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/* Yield specific cores by send inter-processor interrupt */
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void vPortYieldCore( uint32_t xCoreID );
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/*
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* Inter-processor interrupt handler. The interrupt is triggered by
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* portYIELD_CORE().
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*/
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void vPortIPIHander( void );
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/* These functions below implement recursive spinlock for exclusive access among
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* cores. The core will wait until lock will be available, whilst the core which
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* already had lock can acquire lock without waiting. This function could be
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* call from task and interrupt context, the critical section is called
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* as in ISR */
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void vPortRecursiveLockAcquire( BaseType_t xFromIsr );
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void vPortRecursiveLockRelease( BaseType_t xFromIsr );
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#endif /* (configNUMBER_OF_CORES > 1) */
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/*-----------------------------------------------------------*/
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/*
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* These below functions implement interrupt mask from interrupt. They are not
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* called in nesting, it is protected by FreeRTOS kernel.
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*/
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portLONG xPortSetInterruptMask( void )
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{
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portLONG ulPSWValue = portSTSR( portPSW_REGISTER_ID );
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portDISABLE_INTERRUPTS();
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/* It returns current value of Program Status Word register */
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return ulPSWValue;
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}
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/*-----------------------------------------------------------*/
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void vPortClearInterruptMask( portLONG uxSavedInterruptStatus )
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{
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portLONG ulPSWValue = portSTSR( portPSW_REGISTER_ID );
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/* Interrupt Disable status is indicates by bit#5 of PSW
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* (1: Interrupt is disabled; 0: Interrupt is enabled) */
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/* Revert to the status before interrupt mask. */
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ulPSWValue &= ( ~( portPSW_ID_MASK ) );
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ulPSWValue |= ( portPSW_ID_MASK & uxSavedInterruptStatus );
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portLDSR( portPSW_REGISTER_ID, ulPSWValue );
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}
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/*-----------------------------------------------------------*/
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/*
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* Using CC-RH intrinsic function to get HTCFG0 (regID, selID) = (0,2)
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* Core ID is indicates by bit HTCFG0.PEID located at bit 18 to 16
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* Bit 31 to 19 are read only and always be read as 0. HTCFG0.PEID is 1 and 2
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* corresponding to core 0 (PE1) and core 1 (PE2). It is adjusted to 0 and 1.
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*/
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BaseType_t xPortGET_CORE_ID( void )
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{
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#if ( configNUMBER_OF_CORES > 1 )
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return ( portSTSR_CCRH( 0, 2 ) >> 16 ) - 1;
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#else
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/* In single core, xPortGET_CORE_ID is used in this port only.
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* The dummy core ID could be controlled inside this port. */
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return 0;
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#endif
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}
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/*-----------------------------------------------------------*/
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/*
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* This port supports both multi-cores and single-core, whilst TCB stack
|
||||
* variables are different which are respectively pxCurrentTCB (single-core)
|
||||
* and pxCurrentTCBs[] (multiple-cores). This function is defined to obtains
|
||||
* TCBs of current cores. Also, the C function could switch to corresponding
|
||||
* pointer by pre-compile conditions.
|
||||
*/
|
||||
void * pvPortGetCurrentTCB( void )
|
||||
{
|
||||
void * pvCurrentTCB = ( void * ) xTaskGetCurrentTaskHandle();
|
||||
|
||||
configASSERT( pvCurrentTCB != NULL );
|
||||
|
||||
return pvCurrentTCB;
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
* This function checks if a context switch is required and, if so, updates
|
||||
* the scheduler status for the core on which the function is called. The
|
||||
* scheduler status is set to indicate that a task switch should occur.
|
||||
*/
|
||||
void vPortSetSwitch( BaseType_t xSwitchRequired )
|
||||
{
|
||||
if( xSwitchRequired != pdFALSE )
|
||||
{
|
||||
xPortScheduleStatus[ xPortGET_CORE_ID() ] = PORT_SCHEDULER_TASKSWITCH;
|
||||
}
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
* Setup the stack of a new task so it is ready to be placed under the
|
||||
* scheduler control. The registers have to be placed on the stack in the
|
||||
* order that the port expects to find them.
|
||||
*
|
||||
* @param[in] pxTopOfStack Pointer to top of this task's stack
|
||||
* @param[in] pxCode Task function, stored as initial PC for the task
|
||||
* @param[in] pvParameters Parameters for task
|
||||
*/
|
||||
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. */
|
||||
*pxTopOfStack = ( StackType_t ) prvTaskExitError; /* R31 (LP) */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R5; /* R5 (TP) */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) pvParameters; /* R6 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R7; /* R7 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R8; /* R8 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R9; /* R9 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R10; /* R10 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R11; /* R11 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R12; /* R12 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R13; /* R13 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R14; /* R14 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R15; /* R15 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R16; /* R16 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R17; /* R17 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R18; /* R18 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R19; /* R19 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R20; /* R20 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R21; /* R21 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R22; /* R22 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R23; /* R23 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R24; /* R24 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R25; /* R25 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R26; /* R26 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R27; /* R27 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R28; /* R28 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R29; /* R29 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R30; /* R30 (EP) */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R1; /* R1 */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portSTACK_INITIAL_VALUE_R2; /* R2 */
|
||||
|
||||
pxTopOfStack--;
|
||||
|
||||
/* Keep System pre-configuration (HV, CUx, EBV) as current setting in
|
||||
* PSW register */
|
||||
*pxTopOfStack = ( StackType_t ) ( portCURRENT_PSW_VALUE & portINITIAL_PSW_MASK ); /* EIPSW */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) pxCode; /* EIPC */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portCURRENT_SR_ZERO_VALUE; /* EIIC */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) ( portCURRENT_PSW_VALUE & portINITIAL_PSW_MASK ); /* CTPSW */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portCURRENT_SR_ZERO_VALUE; /* CTPC */
|
||||
|
||||
/* __FPU is defined by CCRH compiler if FPU is enabled */
|
||||
#if ( configENABLE_FPU == 1 )
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) ( portCURRENT_FPSR_VALUE & portINITIAL_FPSR_MASK ); /* FPSR */
|
||||
pxTopOfStack--;
|
||||
*pxTopOfStack = ( StackType_t ) portCURRENT_SR_ZERO_VALUE; /* FPEPC */
|
||||
#endif /* (configENABLE_FPU == 1) */
|
||||
|
||||
return pxTopOfStack;
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
* Configures the tick frequency and starts the first task.
|
||||
*/
|
||||
BaseType_t xPortStartScheduler( void )
|
||||
{
|
||||
#if ( configNUMBER_OF_CORES > 1 )
|
||||
BaseType_t xCurrentCore = xPortGET_CORE_ID();
|
||||
#endif
|
||||
|
||||
/* Prevent interrupt by timer interrupt during starting first task.
|
||||
* The interrupt shall be enabled automatically by being restored from
|
||||
* task stack */
|
||||
portDISABLE_INTERRUPTS();
|
||||
|
||||
/* Setup the tick interrupt */
|
||||
configSETUP_TICK_INTERRUPT();
|
||||
|
||||
#if ( configNUMBER_OF_CORES > 1 )
|
||||
/* Start scheduler on other cores */
|
||||
for( uint16_t xCoreID = 0; xCoreID < configNUMBER_OF_CORES; xCoreID++ )
|
||||
{
|
||||
if( xCoreID != xCurrentCore )
|
||||
{
|
||||
/* Send yielding request to other cores with flag to start
|
||||
* first task. TaskContextSwitch is not executed */
|
||||
xPortScheduleStatus[ xCoreID ] = PORT_SCHEDULER_STARTFIRSTTASK;
|
||||
vPortYieldCore( xCoreID );
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Nothing to do. The first task is started in this call by
|
||||
* below vPortStartFirstTask() */
|
||||
xPortScheduleStatus[ xCoreID ] = PORT_SCHEDULER_NOREQUEST;
|
||||
}
|
||||
}
|
||||
#endif /* if ( configNUMBER_OF_CORES > 1 ) */
|
||||
|
||||
/* Start first task in primary core */
|
||||
vPortStartFirstTask();
|
||||
|
||||
/* Should never get here as the tasks will now be executing! */
|
||||
prvTaskExitError();
|
||||
|
||||
/* To prevent compiler warnings in the case that the application writer
|
||||
* overrides this functionality by defining configTASK_RETURN_ADDRESS.
|
||||
* Call vTaskSwitchContext() so link time optimization does not remove
|
||||
* the symbol. */
|
||||
vTaskSwitchContext(
|
||||
#if ( configNUMBER_OF_CORES > 1 )
|
||||
xCurrentCore
|
||||
#endif
|
||||
);
|
||||
|
||||
return pdFALSE;
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
* Used to catch tasks that attempt to return from their implementing function.
|
||||
*/
|
||||
static void prvTaskExitError( void )
|
||||
{
|
||||
/* A function that implements a task must not exit or attempt to return to
|
||||
* its caller as there is nothing to return to. If a task wants to exit it
|
||||
* should instead call vTaskDelete( NULL ).
|
||||
*
|
||||
* Artificially force an assert() to be triggered if configASSERT() is
|
||||
* defined, then stop here so application writers can catch the error. */
|
||||
|
||||
/* This statement will always fail, triggering the assert */
|
||||
configASSERT( pdFALSE );
|
||||
|
||||
/*
|
||||
* The following statement may be unreachable because configASSERT(pdFALSE)
|
||||
* always triggers an assertion failure, which typically halts program
|
||||
* execution.
|
||||
* The warning may be reported to indicate to indicate that the compiler
|
||||
* detects the subsequent code will not be executed.
|
||||
* The warning is acceptable to ensure program is halt regardless of
|
||||
* configASSERT(pdFALSE) implementation
|
||||
*/
|
||||
portDISABLE_INTERRUPTS();
|
||||
|
||||
for( ; ; )
|
||||
{
|
||||
/* Infinite loop to ensure the function does not return. */
|
||||
}
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
void vPortEndScheduler( void )
|
||||
{
|
||||
/* Not implemented in ports where there is nothing to return to.
|
||||
* Artificially force an assert. */
|
||||
configASSERT( pdFALSE );
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
#if ( configNUMBER_OF_CORES > 1 )
|
||||
|
||||
void vPortYieldCore( uint32_t xCoreID )
|
||||
{
|
||||
/* Check if we need to yield on a different core */
|
||||
if( xCoreID != xPortGET_CORE_ID() )
|
||||
{
|
||||
volatile uint32_t * pulIPIRReg;
|
||||
|
||||
/* Determine the IPI register based on the target core ID */
|
||||
pulIPIRReg = ( volatile uint32_t * ) ( portIPIR_BASE_ADDR );
|
||||
|
||||
/*Inter-processor interrupt generates an interrupt request by
|
||||
* writing 1 to applicable bits of target cores. The interrupt
|
||||
* should be enabled by application in corresponding cores
|
||||
* including PSW.ID (EI instruction) and interrupt control setting
|
||||
* for ICIPIRn channel (interrupt mask, vector method)
|
||||
*/
|
||||
*pulIPIRReg = ( 1 << xCoreID );
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Yielding current core */
|
||||
vPortYield();
|
||||
}
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
* Handler for inter-processor interrupt in second cores. The interrupt is
|
||||
* triggered by portYIELD_CORE(). vTaskSwitchContext() is invoked to
|
||||
* switch tasks
|
||||
*/
|
||||
void vPortIPIHander( void )
|
||||
{
|
||||
BaseType_t xCurrentCore = xPortGET_CORE_ID();
|
||||
|
||||
/* 1st execution starts 1st task, TaskSwitchContext is not executed */
|
||||
if( PORT_SCHEDULER_STARTFIRSTTASK != xPortScheduleStatus[ xCurrentCore ] )
|
||||
{
|
||||
xPortScheduleStatus[ xCurrentCore ] = PORT_SCHEDULER_TASKSWITCH;
|
||||
}
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
#endif /* (configNUMBER_OF_CORES > 1) */
|
||||
|
||||
void vPortTickISR( void )
|
||||
{
|
||||
/* In case of multicores with SMP, xTaskIncrementTick is required to
|
||||
* called in critical section to avoid conflict resource as this function
|
||||
* could be called by xTaskResumeAll() from any cores. */
|
||||
#if ( configNUMBER_OF_CORES > 1 )
|
||||
BaseType_t xSavedInterruptStatus;
|
||||
|
||||
xSavedInterruptStatus = portENTER_CRITICAL_FROM_ISR();
|
||||
#endif
|
||||
{
|
||||
/* Increment the RTOS tick. */
|
||||
if( xTaskIncrementTick() != pdFALSE )
|
||||
{
|
||||
/* Pend a context switch. */
|
||||
xPortScheduleStatus[ xPortGET_CORE_ID() ] = PORT_SCHEDULER_TASKSWITCH;
|
||||
}
|
||||
}
|
||||
#if ( configNUMBER_OF_CORES > 1 )
|
||||
portEXIT_CRITICAL_FROM_ISR( xSavedInterruptStatus );
|
||||
#endif
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
static void prvSetupTimerInterrupt( void )
|
||||
{
|
||||
volatile uint32_t * pulOSTMIntReg;
|
||||
|
||||
/* Interrupt configuration for OSTM Timer
|
||||
* By default, the second lowest priority is set for timer interrupt to
|
||||
* avoid blocking other interrupt. Normally, user could set the lowest
|
||||
* priority for non-critical event. It try to keep timer on time.
|
||||
* In addition, direct vector table is used by default.
|
||||
*/
|
||||
pulOSTMIntReg = ( volatile uint32_t * ) portOSTM_EIC_ADDR;
|
||||
*pulOSTMIntReg = ( portINT_PROCESSING_ENABLED | portINT_DIRECT_VECTOR | portINT_PRIORITY_LEVEL14 );
|
||||
|
||||
/* Set OSTM0 control setting */
|
||||
*( ( volatile uint32_t * ) portOSTM0CTL_ADDR ) =
|
||||
( portOSTM_MODE_INTERVAL_TIMER | portOSTM_START_INTERRUPT_DISABLE );
|
||||
*( ( volatile uint32_t * ) portOSTM0CMP_ADDR ) =
|
||||
( ( configCPU_CLOCK_HZ / configTIMER_PRESCALE ) / configTICK_RATE_HZ ) - 1;
|
||||
|
||||
/* Enable OSTM0 operation */
|
||||
*( ( volatile uint32_t * ) portOSTM0TS_ADDR ) = portOSTM_COUNTER_START;
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
#if ( configNUMBER_OF_CORES > 1 )
|
||||
|
||||
/*
|
||||
* These functions implement spin-lock mechanism among cores using hardware
|
||||
* exclusive control with atomic access by CLR1 and SET1 instruction.
|
||||
* Nesting calls to these APIs are possible.
|
||||
*/
|
||||
#pragma inline_asm prvExclusiveLock
|
||||
static void prvExclusiveLock( BaseType_t xBitPosition )
|
||||
{
|
||||
/* No problem with r19, CCRH does not required to restore same value
|
||||
* before and after function call. */
|
||||
mov # _pxPortExclusiveReg, r19
|
||||
ld.w 0[ r19 ], r19
|
||||
|
||||
prvExclusiveLock_Lock:
|
||||
|
||||
/* r6 is xBitPosition */
|
||||
set1 r6, [ r19 ]
|
||||
bz prvExclusiveLock_Lock_success
|
||||
snooze
|
||||
br prvExclusiveLock_Lock
|
||||
|
||||
prvExclusiveLock_Lock_success:
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
#pragma inline_asm prvExclusiveRelease
|
||||
static void prvExclusiveRelease( BaseType_t xBitPosition )
|
||||
{
|
||||
mov # _pxPortExclusiveReg, r19
|
||||
ld.w 0[ r19 ], r19
|
||||
|
||||
/* r6 is xBitPosition */
|
||||
clr1 r6, [ r19 ]
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
void vPortRecursiveLockAcquire( BaseType_t xFromIsr )
|
||||
{
|
||||
BaseType_t xSavedInterruptStatus;
|
||||
BaseType_t xCoreID = xPortGET_CORE_ID();
|
||||
BaseType_t xBitPosition = ( xFromIsr == pdTRUE );
|
||||
|
||||
xSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();
|
||||
|
||||
if( uxLockNesting[ xCoreID ][ xBitPosition ] == 0 )
|
||||
{
|
||||
prvExclusiveLock( xBitPosition );
|
||||
}
|
||||
|
||||
uxLockNesting[ xCoreID ][ xBitPosition ]++;
|
||||
portCLEAR_INTERRUPT_MASK_FROM_ISR( xSavedInterruptStatus );
|
||||
}
|
||||
|
||||
void vPortRecursiveLockRelease( BaseType_t xFromIsr )
|
||||
{
|
||||
BaseType_t xSavedInterruptStatus;
|
||||
BaseType_t xCoreID = xPortGET_CORE_ID();
|
||||
BaseType_t xBitPosition = ( xFromIsr == pdTRUE );
|
||||
|
||||
xSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();
|
||||
|
||||
/* Sync memory */
|
||||
portSYNCM();
|
||||
|
||||
/* Error check whether vPortRecursiveLockRelease() is not called in
|
||||
* pair with vPortRecursiveLockAcquire() */
|
||||
configASSERT( ( uxLockNesting[ xCoreID ][ xBitPosition ] > 0 ) );
|
||||
uxLockNesting[ xCoreID ][ xBitPosition ]--;
|
||||
|
||||
if( uxLockNesting[ xCoreID ][ xBitPosition ] == 0 )
|
||||
{
|
||||
prvExclusiveRelease( xBitPosition );
|
||||
}
|
||||
|
||||
portCLEAR_INTERRUPT_MASK_FROM_ISR( xSavedInterruptStatus );
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
#endif /* (configNUMBER_OF_CORES > 1) */
|
||||
@ -0,0 +1,325 @@
|
||||
;/*
|
||||
; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
|
||||
; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
|
||||
; *
|
||||
; * SPDX-License-Identifier: MIT
|
||||
; *
|
||||
; * 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.
|
||||
; *
|
||||
; * https://www.FreeRTOS.org
|
||||
; * https://github.com/FreeRTOS
|
||||
; *
|
||||
; */
|
||||
|
||||
;------------------------------------------------------------------------------
|
||||
; Extern symbols
|
||||
;------------------------------------------------------------------------------
|
||||
.extern _uxInterruptNesting
|
||||
.extern _uxPortMaxInterruptDepth
|
||||
.extern _xPortScheduleStatus
|
||||
.extern _vTaskSwitchContext
|
||||
.extern _pvPortGetCurrentTCB
|
||||
.extern _vCommonISRHandler
|
||||
.extern _xPortGET_CORE_ID
|
||||
|
||||
.public _vIrq_Handler
|
||||
.public _vPortStartFirstTask
|
||||
.public _vPortYield
|
||||
.public _vTRAP0_Handler
|
||||
;------------------------------------------------------------------------------
|
||||
; Macro definitions
|
||||
;------------------------------------------------------------------------------
|
||||
EIPC .set 0
|
||||
EIPSW .set 1
|
||||
PSW .set 5
|
||||
FPSR .set 6
|
||||
FPEPC .set 7
|
||||
EIIC .set 13
|
||||
CTPC .set 16
|
||||
CTPSW .set 17
|
||||
EIIC_MSK .set 0x00000FFF
|
||||
FPU_MSK .set 0x00010000
|
||||
;------------------------------------------------------------------------------
|
||||
; portSAVE_CONTEXT
|
||||
; Context saving
|
||||
;------------------------------------------------------------------------------
|
||||
portSAVE_CONTEXT .macro
|
||||
prepare lp, 0
|
||||
|
||||
; Save general-purpose registers and EIPSW, EIPC, EIIC, CTPSW, CTPC into stack.
|
||||
pushsp r5, r30
|
||||
$nowarning
|
||||
pushsp r1, r2
|
||||
$warning
|
||||
|
||||
stsr EIPSW, r15
|
||||
stsr EIPC, r16
|
||||
stsr EIIC, r17
|
||||
stsr CTPSW, r18
|
||||
stsr CTPC, r19
|
||||
pushsp r15, r19
|
||||
|
||||
; Save FPU registers to stack if FPU is enabled
|
||||
mov FPU_MSK, r19
|
||||
tst r15, r19
|
||||
|
||||
; Jump over next 3 instructions: stsr (4 bytes)*2 + pushsp (4 bytes)
|
||||
bz 12
|
||||
stsr FPSR, r18
|
||||
stsr FPEPC, r19
|
||||
pushsp r18, r19
|
||||
|
||||
; Get current TCB, the return value is stored in r10 (CCRH compiler)
|
||||
jarl _pvPortGetCurrentTCB, lp
|
||||
st.w sp, 0[r10]
|
||||
|
||||
.endm
|
||||
|
||||
;------------------------------------------------------------------------------
|
||||
; portRESTORE_CONTEXT
|
||||
; Context restoring
|
||||
;------------------------------------------------------------------------------
|
||||
portRESTORE_CONTEXT .macro
|
||||
; Current TCB is returned by r10 (CCRH compiler)
|
||||
jarl _pvPortGetCurrentTCB, lp
|
||||
ld.w 0[r10], sp ; Restore the stack pointer from the TCB
|
||||
|
||||
; Restore FPU registers if FPU is enabled
|
||||
mov FPU_MSK, r19
|
||||
stsr PSW, r18
|
||||
tst r18, r19
|
||||
|
||||
; Jump over next 3 instructions: stsr (4 bytes)*2 + popsp (4 bytes)
|
||||
bz 12
|
||||
popsp r18, r19
|
||||
ldsr r18, FPEPC
|
||||
ldsr r19, FPSR
|
||||
|
||||
;Restore general-purpose registers and EIPSW, EIPC, EIIC, CTPSW, CTPC
|
||||
popsp r15, r19
|
||||
ldsr r19, CTPC
|
||||
ldsr r18, CTPSW
|
||||
ldsr r17, EIIC
|
||||
ldsr r16, EIPC
|
||||
ldsr r15, EIPSW
|
||||
|
||||
$nowarning
|
||||
popsp r1, r2
|
||||
$warning
|
||||
popsp r5, r30
|
||||
|
||||
dispose 0, lp
|
||||
.endm
|
||||
|
||||
;------------------------------------------------------------------------------
|
||||
; Save used registers
|
||||
;------------------------------------------------------------------------------
|
||||
SAVE_REGISTER .macro
|
||||
; Save general-purpose registers and EIPSW, EIPC, EIIC, CTPSW, CTPC into stack.
|
||||
; Callee-Save registers (r20 to r30) are not used in interrupt handler and
|
||||
; guaranteed no change after function call. So, don't need to save register
|
||||
; to optimize the used stack memory.
|
||||
pushsp r5, r19
|
||||
$nowarning
|
||||
pushsp r1, r2
|
||||
$warning
|
||||
|
||||
stsr EIPSW, r19
|
||||
stsr EIPC, r18
|
||||
stsr EIIC, r17
|
||||
mov lp, r16
|
||||
mov ep, r15
|
||||
stsr CTPSW, r14
|
||||
stsr CTPC, r13
|
||||
pushsp r13, r19
|
||||
|
||||
mov FPU_MSK, r16
|
||||
tst r16, r19
|
||||
bz 12
|
||||
stsr FPSR, r18
|
||||
stsr FPEPC, r19
|
||||
pushsp r18, r19
|
||||
|
||||
.endm
|
||||
;------------------------------------------------------------------------------
|
||||
; Restore used registers
|
||||
;------------------------------------------------------------------------------
|
||||
RESTORE_REGISTER .macro
|
||||
|
||||
mov FPU_MSK, r16
|
||||
stsr PSW, r18
|
||||
tst r18, r19
|
||||
bz 12
|
||||
popsp r18, r19
|
||||
ldsr r18, FPEPC
|
||||
ldsr r19, FPSR
|
||||
|
||||
popsp r13, r19
|
||||
ldsr r13, CTPC
|
||||
ldsr r14, CTPSW
|
||||
mov r15, ep
|
||||
mov r16, lp
|
||||
ldsr r17, EIIC
|
||||
ldsr r18, EIPC
|
||||
ldsr r19, EIPSW
|
||||
|
||||
$nowarning
|
||||
popsp r1, r2
|
||||
$warning
|
||||
popsp r5, r19
|
||||
.endm
|
||||
|
||||
;------------------------------------------------------------------------------
|
||||
; Start the first task.
|
||||
;------------------------------------------------------------------------------
|
||||
_vPortStartFirstTask:
|
||||
portRESTORE_CONTEXT
|
||||
eiret
|
||||
|
||||
;------------------------------------------------------------------------------
|
||||
; _vPortYield
|
||||
;------------------------------------------------------------------------------
|
||||
_vPortYield:
|
||||
trap 0
|
||||
jmp [lp] ; Return to caller function
|
||||
|
||||
;------------------------------------------------------------------------------
|
||||
; PortYield handler. This is installed as the TRAP exception handler.
|
||||
;------------------------------------------------------------------------------
|
||||
_vTRAP0_Handler:
|
||||
;Save the context of the current task.
|
||||
portSAVE_CONTEXT
|
||||
|
||||
; The use case that portYield() is called from interrupt context as nested interrupt.
|
||||
; Context switch should be executed at the most outer of interrupt tree.
|
||||
; In that case, set xPortScheduleStatus to flag context switch in interrupt handler.
|
||||
jarl _xPortGET_CORE_ID, lp ; return value is contained in r10 (CCRH compiler)
|
||||
mov r10, r11
|
||||
shl 2, r11
|
||||
mov #_uxInterruptNesting, r19
|
||||
add r11, r19
|
||||
ld.w 0[r19], r18
|
||||
cmp r0, r18
|
||||
be _vTRAP0_Handler_ContextSwitch
|
||||
|
||||
mov #_xPortScheduleStatus, r19
|
||||
add r11, r19
|
||||
|
||||
; Set xPortScheduleStatus[coreID]=PORT_SCHEDULER_TASKSWITCH
|
||||
mov 1, r17
|
||||
st.w r17, 0[r19]
|
||||
br _vTRAP0_Handler_Exit
|
||||
|
||||
_vTRAP0_Handler_ContextSwitch:
|
||||
; Pass coreID (r10) as parameter by r6 (CCRH compiler) in SMP support.
|
||||
mov r10, r6
|
||||
; Call the scheduler to select the next task.
|
||||
; vPortYeild may be called to current core again at the end of vTaskSwitchContext.
|
||||
; This may case nested interrupt, however, it is not necessary to set
|
||||
; uxInterruptNesting (currently 0) for nested trap0 exception. The user interrupt
|
||||
; (EI level interrupt) is not accepted inside of trap0 exception.
|
||||
jarl _vTaskSwitchContext, lp
|
||||
|
||||
_vTRAP0_Handler_Exit:
|
||||
; Restore the context of the next task to run.
|
||||
portRESTORE_CONTEXT
|
||||
eiret
|
||||
|
||||
;------------------------------------------------------------------------------
|
||||
; _Irq_Handler
|
||||
; Handler interrupt service routine (ISR).
|
||||
;------------------------------------------------------------------------------
|
||||
_vIrq_Handler:
|
||||
; Save used registers.
|
||||
SAVE_REGISTER
|
||||
|
||||
; Get core ID by HTCFG0, thread configuration register.
|
||||
; Then, increase nesting count for current core.
|
||||
jarl _xPortGET_CORE_ID, lp ; return value is contained in r10 (CCRH compiler)
|
||||
shl 2, r10
|
||||
mov r10, r17
|
||||
|
||||
mov #_uxInterruptNesting, r19
|
||||
add r17, r19
|
||||
ld.w 0[r19], r18
|
||||
addi 0x1, r18, r16
|
||||
st.w r16, 0[r19]
|
||||
|
||||
pushsp r17, r19
|
||||
|
||||
;Call the interrupt handler.
|
||||
stsr EIIC, r6
|
||||
andi EIIC_MSK, r6, r6
|
||||
|
||||
; Do not enable interrupt for nesting. Stackover flow may occurs if the
|
||||
; depth of nesting interrupt is exceeded.
|
||||
mov #_uxPortMaxInterruptDepth, r15
|
||||
cmp r16, r15
|
||||
be 4 ; Jump over ei instruction
|
||||
ei
|
||||
jarl _vCommonISRHandler, lp
|
||||
di
|
||||
synce
|
||||
|
||||
popsp r17, r19
|
||||
st.w r18, 0[r19] ; Restore the old nesting count.
|
||||
|
||||
; A context switch if no nesting interrupt.
|
||||
cmp 0x0, r18
|
||||
bne _vIrq_Handler_NotSwitchContext
|
||||
|
||||
; Check if context switch is requested.
|
||||
mov #_xPortScheduleStatus, r19
|
||||
add r17, r19
|
||||
ld.w 0[r19], r18
|
||||
cmp r0, r18
|
||||
bne _vIrq_Handler_SwitchContext
|
||||
|
||||
_vIrq_Handler_NotSwitchContext:
|
||||
; No context switch. Restore used registers
|
||||
RESTORE_REGISTER
|
||||
eiret
|
||||
|
||||
;This sequence is executed for primary core only to switch context
|
||||
_vIrq_Handler_SwitchContext:
|
||||
; Clear the context switch pending flag.
|
||||
st.w r0, 0[r19]
|
||||
|
||||
add -1, r18
|
||||
bnz _vIrq_Handler_StartFirstTask
|
||||
; Restore used registers before saving the context to the task stack.
|
||||
RESTORE_REGISTER
|
||||
portSAVE_CONTEXT
|
||||
|
||||
; Get Core ID and pass to vTaskSwitchContext as parameter (CCRH compiler)
|
||||
; The parameter is unused in single core, no problem with this redudant setting
|
||||
jarl _xPortGET_CORE_ID, lp ; return value is contained in r10 (CCRH compiler)
|
||||
mov r10, r6
|
||||
|
||||
; vPortYeild may be called to current core again at the end of vTaskSwitchContext.
|
||||
; This may case nested interrupt, however, it is not necessary to set
|
||||
; uxInterruptNesting (currently 0) for trap0 exception. The user interrupt
|
||||
; (EI level interrupt) is not accepted inside of trap0 exception.
|
||||
jarl _vTaskSwitchContext, lp ;
|
||||
portRESTORE_CONTEXT
|
||||
eiret
|
||||
|
||||
_vIrq_Handler_StartFirstTask:
|
||||
RESTORE_REGISTER
|
||||
jr _vPortStartFirstTask
|
||||
|
||||
@ -0,0 +1,193 @@
|
||||
/*
|
||||
* FreeRTOS Kernel <DEVELOPMENT BRANCH>
|
||||
* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
|
||||
*
|
||||
* SPDX-License-Identifier: MIT
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* https://www.FreeRTOS.org
|
||||
* https://github.com/FreeRTOS
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef PORTMACRO_H
|
||||
#define PORTMACRO_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C"
|
||||
{
|
||||
#endif
|
||||
|
||||
/*-----------------------------------------------------------
|
||||
* Port specific definitions.
|
||||
*
|
||||
* The settings in this file configure FreeRTOS correctly for the
|
||||
* given hardware and compiler.
|
||||
*
|
||||
* These settings should not be altered.
|
||||
*-----------------------------------------------------------
|
||||
*/
|
||||
|
||||
/* Type definitions - These are a bit legacy and not really used now, other
|
||||
* than portSTACK_TYPE and portBASE_TYPE. */
|
||||
#define portCHAR char
|
||||
#define portFLOAT float
|
||||
#define portDOUBLE double
|
||||
#define portLONG long
|
||||
#define portSHORT short
|
||||
#define portSTACK_TYPE uint32_t
|
||||
#define portBASE_TYPE long
|
||||
|
||||
typedef portSTACK_TYPE StackType_t;
|
||||
typedef long BaseType_t;
|
||||
typedef unsigned long UBaseType_t;
|
||||
|
||||
/* Defines the maximum time when using a wait command in a task */
|
||||
#if ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_16_BITS )
|
||||
typedef uint16_t TickType_t;
|
||||
#define portMAX_DELAY ( TickType_t ) 0xffff
|
||||
#elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
|
||||
typedef uint32_t TickType_t;
|
||||
#define portMAX_DELAY ( TickType_t ) 0xffffffffUL
|
||||
|
||||
/* 32-bit tick type on a 32-bit architecture, so reads of the tick count do
|
||||
* not need to be guarded with a critical section. */
|
||||
#define portTICK_TYPE_IS_ATOMIC 1
|
||||
#else
|
||||
#error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
|
||||
#endif
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* Architecture specifics */
|
||||
|
||||
#define portSTSR( reg ) __stsr( ( reg ) )
|
||||
#define portLDSR( reg, val ) __ldsr( ( reg ), ( val ) )
|
||||
#define portSTSR_CCRH( reg, sel ) __stsr_rh( ( reg ), ( sel ) )
|
||||
#define portSYNCM() __syncm()
|
||||
|
||||
/* Determine the descending of the stack from high address to address */
|
||||
#define portSTACK_GROWTH ( -1 )
|
||||
|
||||
/* Determine the time (in milliseconds) corresponding to each tick */
|
||||
#define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
|
||||
|
||||
/* It is a multiple of 4 (the two lower-order bits of the address = 0),
|
||||
* otherwise it will cause MAE (Misaligned Exception) according to the manual */
|
||||
#define portBYTE_ALIGNMENT ( 4 )
|
||||
|
||||
/* Interrupt control macros. */
|
||||
|
||||
#define portENABLE_INTERRUPTS() __EI() /* Macro to enable all maskable interrupts. */
|
||||
#define portDISABLE_INTERRUPTS() __DI() /* Macro to disable all maskable interrupts. */
|
||||
#define taskENABLE_INTERRUPTS() portENABLE_INTERRUPTS()
|
||||
#define taskDISABLE_INTERRUPTS() portDISABLE_INTERRUPTS()
|
||||
|
||||
/* SMP build which means configNUM_CORES is relevant */
|
||||
#define portSUPPORT_SMP 1
|
||||
|
||||
#define portMAX_CORE_COUNT 2
|
||||
#ifndef configNUMBER_OF_CORES
|
||||
#define configNUMBER_OF_CORES 1
|
||||
#endif
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
/* Scheduler utilities */
|
||||
|
||||
/* Called at the end of an ISR that can cause a context switch */
|
||||
extern void vPortSetSwitch( BaseType_t vPortSetSwitch );
|
||||
|
||||
#define portEND_SWITCHING_ISR( xSwitchRequired ) vPortSetSwitch( vPortSetSwitch )
|
||||
|
||||
#define portYIELD_FROM_ISR( x ) portEND_SWITCHING_ISR( x )
|
||||
|
||||
/* Use to transfer control from one task to perform other tasks of
|
||||
* higher priority */
|
||||
extern void vPortYield( void );
|
||||
|
||||
#define portYIELD() vPortYield()
|
||||
#if ( configNUMBER_OF_CORES > 1 )
|
||||
|
||||
/* Return the core ID on which the code is running. */
|
||||
extern BaseType_t xPortGET_CORE_ID();
|
||||
|
||||
#define portGET_CORE_ID() xPortGET_CORE_ID()
|
||||
#define coreid xPortGET_CORE_ID()
|
||||
|
||||
/* Request the core ID x to yield. */
|
||||
extern void vPortYieldCore( unsigned int coreID );
|
||||
|
||||
#define portYIELD_CORE( x ) vPortYieldCore( x )
|
||||
|
||||
#define portENTER_CRITICAL_FROM_ISR() vTaskEnterCriticalFromISR()
|
||||
#define portEXIT_CRITICAL_FROM_ISR( x ) vTaskExitCriticalFromISR( x )
|
||||
|
||||
#endif /* if ( configNUMBER_OF_CORES > 1 ) */
|
||||
|
||||
#if ( configNUMBER_OF_CORES == 1 )
|
||||
#define portGET_ISR_LOCK()
|
||||
#define portRELEASE_ISR_LOCK()
|
||||
#define portGET_TASK_LOCK()
|
||||
#define portRELEASE_TASK_LOCK()
|
||||
#else
|
||||
extern void vPortRecursiveLockAcquire( BaseType_t xFromIsr );
|
||||
extern void vPortRecursiveLockRelease( BaseType_t xFromIsr );
|
||||
|
||||
#define portGET_ISR_LOCK() vPortRecursiveLockAcquire( pdTRUE )
|
||||
#define portRELEASE_ISR_LOCK() vPortRecursiveLockRelease( pdTRUE )
|
||||
#define portGET_TASK_LOCK() vPortRecursiveLockAcquire( pdFALSE )
|
||||
#define portRELEASE_TASK_LOCK() vPortRecursiveLockRelease( pdFALSE )
|
||||
#endif /* if ( configNUMBER_OF_CORES == 1 ) */
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
/* Critical section management. */
|
||||
|
||||
/* The critical nesting functions defined within tasks.c */
|
||||
|
||||
extern void vTaskEnterCritical( void );
|
||||
extern void vTaskExitCritical( void );
|
||||
|
||||
/* Macro to mark the start of a critical code region */
|
||||
#define portENTER_CRITICAL() vTaskEnterCritical()
|
||||
|
||||
/* Macro to mark the end of a critical code region */
|
||||
#define portEXIT_CRITICAL() vTaskExitCritical()
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
/* Macros to set and clear the interrupt mask. */
|
||||
portLONG xPortSetInterruptMask();
|
||||
void vPortClearInterruptMask( portLONG );
|
||||
|
||||
#define portSET_INTERRUPT_MASK() xPortSetInterruptMask()
|
||||
#define portCLEAR_INTERRUPT_MASK( x ) vPortClearInterruptMask( ( x ) )
|
||||
#define portSET_INTERRUPT_MASK_FROM_ISR() xPortSetInterruptMask()
|
||||
#define portCLEAR_INTERRUPT_MASK_FROM_ISR( x ) vPortClearInterruptMask( ( x ) )
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
/* Task function macros as described on the FreeRTOS.org WEB site. */
|
||||
|
||||
#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void * pvParameters )
|
||||
#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void * pvParameters )
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
#endif /* PORTMACRO_H */
|
||||
Loading…
Reference in New Issue