From: richardbarry Date: Thu, 26 Aug 2010 15:59:25 +0000 (+0000) Subject: Create starting point for RX62N GCC port. Just a work in progress at the moment. X-Git-Tag: V6.1.0~74 X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=e55110d7d532fc862495dd5ff8fc9bdb888807e8;p=freertos Create starting point for RX62N GCC port. Just a work in progress at the moment. git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@1061 1d2547de-c912-0410-9cb9-b8ca96c0e9e2 --- diff --git a/Source/portable/GCC/RX600/port.c b/Source/portable/GCC/RX600/port.c new file mode 100644 index 000000000..37e624346 --- /dev/null +++ b/Source/portable/GCC/RX600/port.c @@ -0,0 +1,382 @@ +/* + FreeRTOS V6.0.5 - Copyright (C) 2010 Real Time Engineers Ltd. + + *************************************************************************** + * * + * If you are: * + * * + * + New to FreeRTOS, * + * + Wanting to learn FreeRTOS or multitasking in general quickly * + * + Looking for basic training, * + * + Wanting to improve your FreeRTOS skills and productivity * + * * + * then take a look at the FreeRTOS eBook * + * * + * "Using the FreeRTOS Real Time Kernel - a Practical Guide" * + * http://www.FreeRTOS.org/Documentation * + * * + * A pdf reference manual is also available. Both are usually delivered * + * to your inbox within 20 minutes to two hours when purchased between 8am * + * and 8pm GMT (although please allow up to 24 hours in case of * + * exceptional circumstances). Thank you for your support! * + * * + *************************************************************************** + + This file is part of the FreeRTOS distribution. + + FreeRTOS is free software; you can redistribute it and/or modify it under + the terms of the GNU General Public License (version 2) as published by the + Free Software Foundation AND MODIFIED BY the FreeRTOS exception. + ***NOTE*** The exception to the GPL is included to allow you to distribute + a combined work that includes FreeRTOS without being obliged to provide the + source code for proprietary components outside of the FreeRTOS kernel. + FreeRTOS is distributed in the hope that it will be useful, but WITHOUT + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + more details. You should have received a copy of the GNU General Public + License and the FreeRTOS license exception along with FreeRTOS; if not it + can be viewed here: http://www.freertos.org/a00114.html and also obtained + by writing to Richard Barry, contact details for whom are available on the + FreeRTOS WEB site. + + 1 tab == 4 spaces! + + http://www.FreeRTOS.org - Documentation, latest information, license and + contact details. + + http://www.SafeRTOS.com - A version that is certified for use in safety + critical systems. + + http://www.OpenRTOS.com - Commercial support, development, porting, + licensing and training services. +*/ + +/*----------------------------------------------------------- + * Implementation of functions defined in portable.h for the SH2A port. + *----------------------------------------------------------*/ + +/* Scheduler includes. */ +#include "FreeRTOS.h" +#include "task.h" + +/* Library includes. */ +#include "string.h" + +/* Hardware specifics. */ +#include "iodefine.h" + +/*-----------------------------------------------------------*/ + +/* Tasks should start with interrupts enabled and in Supervisor mode, therefore +PSW is set with U and I set, and PM and IPL clear. */ +#define portINITIAL_PSW ( ( portSTACK_TYPE ) 0x00030000 ) +#define portINITIAL_FPSW ( ( portSTACK_TYPE ) 0x00000100 ) + +/*-----------------------------------------------------------*/ + +/* + * Function to start the first task executing - written in asm code as direct + * access to registers is required. + */ +static void prvStartFirstTask( void ) __attribute__((naked)); + +/* + * Software interrupt handler. Performs the actual context switch (saving and + * restoring of registers). Written in asm code as direct register access is + * required. + */ +static void prvYieldHandler( void ); + +/* + * The entry point for the software interrupt handler. This is the function + * that calls the inline asm function prvYieldHandler(). It is installed in + * the vector table, but the code that installs it is in prvYieldHandler rather + * than using a #pragma. + */ +void vSoftwareInterruptISR( void ); + +/*-----------------------------------------------------------*/ + +/* This is accessed by the inline assembler functions so is file scope for +convenience. */ +extern void *pxCurrentTCB; +extern void vTaskSwitchContext( void ); + +/*-----------------------------------------------------------*/ + +/* + * See header file for description. + */ +portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters ) +{ + /* R0 is not included as it is the stack pointer. */ + + *pxTopOfStack = 0xdeadbeef; + pxTopOfStack--; + *pxTopOfStack = portINITIAL_PSW; + pxTopOfStack--; + *pxTopOfStack = ( portSTACK_TYPE ) pxCode; + + /* When debugging it can be useful if every register is set to a known + value. Otherwise code space can be saved by just setting the registers + that need to be set. */ + #ifdef USE_FULL_REGISTER_INITIALISATION + { + pxTopOfStack--; + *pxTopOfStack = 0xffffffff; /* r15. */ + pxTopOfStack--; + *pxTopOfStack = 0xeeeeeeee; + pxTopOfStack--; + *pxTopOfStack = 0xdddddddd; + pxTopOfStack--; + *pxTopOfStack = 0xcccccccc; + pxTopOfStack--; + *pxTopOfStack = 0xbbbbbbbb; + pxTopOfStack--; + *pxTopOfStack = 0xaaaaaaaa; + pxTopOfStack--; + *pxTopOfStack = 0x99999999; + pxTopOfStack--; + *pxTopOfStack = 0x88888888; + pxTopOfStack--; + *pxTopOfStack = 0x77777777; + pxTopOfStack--; + *pxTopOfStack = 0x66666666; + pxTopOfStack--; + *pxTopOfStack = 0x55555555; + pxTopOfStack--; + *pxTopOfStack = 0x44444444; + pxTopOfStack--; + *pxTopOfStack = 0x33333333; + pxTopOfStack--; + *pxTopOfStack = 0x22222222; + pxTopOfStack--; + } + #else + { + pxTopOfStack -= 15; + } + #endif + + *pxTopOfStack = ( portSTACK_TYPE ) pvParameters; /* R1 */ + pxTopOfStack--; + *pxTopOfStack = portINITIAL_FPSW; + pxTopOfStack--; + *pxTopOfStack = 0x12345678; /* Accumulator. */ + pxTopOfStack--; + *pxTopOfStack = 0x87654321; /* Accumulator. */ + + return pxTopOfStack; +} +/*-----------------------------------------------------------*/ + +portBASE_TYPE xPortStartScheduler( void ) +{ +extern void vApplicationSetupTimerInterrupt( void ); + + /* Use pxCurrentTCB just so it does not get optimised away. */ + if( pxCurrentTCB != NULL ) + { + /* Call an application function to set up the timer that will generate the + tick interrupt. This way the application can decide which peripheral to + use. A demo application is provided to show a suitable example. */ + vApplicationSetupTimerInterrupt(); + + /* Enable the software interrupt. */ + _IEN( _ICU_SWINT ) = 1; + + /* Ensure the software interrupt is clear. */ + _IR( _ICU_SWINT ) = 0; + + /* Ensure the software interrupt is set to the kernel priority. */ + _IPR( _ICU_SWINT ) = configKERNEL_INTERRUPT_PRIORITY; + + /* Start the first task. */ + prvStartFirstTask(); + } + + /* Just to make sure the function is not optimised away. */ + ( void ) vSoftwareInterruptISR(); + + /* Should not get here. */ + return pdFAIL; +} +/*-----------------------------------------------------------*/ + +static void prvStartFirstTask( void ) +{ + __asm + ( + /* When starting the scheduler there is nothing that needs moving to the + interrupt stack because the function is not called from an interrupt. + Just ensure the current stack is the user stack. */ + "SETPSW U \n" \ + + /* Obtain the location of the stack associated with which ever task + pxCurrentTCB is currently pointing to. */ + "MOV.L #_pxCurrentTCB, R15 \n" \ + "MOV.L [R15], R15 \n" \ + "MOV.L [R15], R0 \n" \ + + /* Restore the registers from the stack of the task pointed to by + pxCurrentTCB. */ + "POP R15 \n" \ + + /* Accumulator low 32 bits. */ + "MVTACLO R15 \n" \ + "POP R15 \n" \ + + /* Accumulator high 32 bits. */ + "MVTACHI R15 \n" \ + "POP R15 \n" \ + + /* Floating point status word. */ + "MVTC R15, FPSW \n" \ + + /* R1 to R15 - R0 is not included as it is the SP. */ + "POPM R1-R15 \n" \ + + /* This pops the remaining registers. */ + "RTE \n" \ + "NOP \n" \ + "NOP \n" + ); +} +/*-----------------------------------------------------------*/ + +void vTickISR( void ) +{ + /* Increment the tick, and perform any processing the new tick value + necessitates. */ + vTaskIncrementTick(); + + /* Only select a new task if the preemptive scheduler is being used. */ + #if( configUSE_PREEMPTION == 1 ) + taskYIELD(); + #endif +} +/*-----------------------------------------------------------*/ + +void vSoftwareInterruptISR( void ) +{ +// prvYieldHandler(); +} +/*-----------------------------------------------------------*/ + +#if 0 +#pragma inline_asm prvYieldHandler +static void prvYieldHandler( void ) +{ + /* Install as the software interrupt handler. */ + .RVECTOR _VECT( _ICU_SWINT ), _vSoftwareInterruptISR + + /* Re-enable interrupts. */ + SETPSW I + + /* Move the data that was automatically pushed onto the interrupt stack when + the interrupt occurred from the interrupt stack to the user stack. + + R15 is saved before it is clobbered. */ + PUSH.L R15 + + /* Read the user stack pointer. */ + MVFC USP, R15 + + /* Move the address down to the data being moved. */ + SUB #12, R15 + MVTC R15, USP + + /* Copy the data across. */ + MOV.L [ R0 ], [ R15 ] ; R15 + MOV.L 4[ R0 ], 4[ R15 ] ; PC + MOV.L 8[ R0 ], 8[ R15 ] ; PSW + + /* Move the interrupt stack pointer to its new correct position. */ + ADD #12, R0 + + /* All the rest of the registers are saved directly to the user stack. */ + SETPSW U + + /* Save the rest of the general registers (R15 has been saved already). */ + PUSHM R1-R14 + + /* Save the FPSW and accumulator. */ + MVFC FPSW, R15 + PUSH.L R15 + MVFACHI R15 + PUSH.L R15 + MVFACMI R15 ; Middle order word. + SHLL #16, R15 ; Shifted left as it is restored to the low order word. + PUSH.L R15 + + /* Save the stack pointer to the TCB. */ + MOV.L #_pxCurrentTCB, R15 + MOV.L [ R15 ], R15 + MOV.L R0, [ R15 ] + + /* Ensure the interrupt mask is set to the syscall priority while the kernel + structures are being accessed. */ + MVTIPL #configMAX_SYSCALL_INTERRUPT_PRIORITY + + /* Select the next task to run. */ + BSR.A _vTaskSwitchContext + + /* Reset the interrupt mask as no more data structure access is required. */ + MVTIPL #configKERNEL_INTERRUPT_PRIORITY + + /* Load the stack pointer of the task that is now selected as the Running + state task from its TCB. */ + MOV.L #_pxCurrentTCB,R15 + MOV.L [ R15 ], R15 + MOV.L [ R15 ], R0 + + /* Restore the context of the new task. The PSW (Program Status Word) and + PC will be popped by the RTE instruction. */ + POP R15 + MVTACLO R15 + POP R15 + MVTACHI R15 + POP R15 + MVTC R15,FPSW + POPM R1-R15 + RTE + NOP + NOP +} +#endif +/*-----------------------------------------------------------*/ + +void vPortEndScheduler( void ) +{ + /* Not implemented as there is nothing to return to. */ + + /* The following line is just to prevent the symbol getting optimised away. */ + ( void ) vTaskSwitchContext(); +} +/*-----------------------------------------------------------*/ + +unsigned long ulPortGetIPL( void ) +{ + __asm( + "MVFC PSW, R1 \n" \ + "SHLR #28, R1 \n" \ + "RTS " + ); +} +/*-----------------------------------------------------------*/ + +void vPortSetIPL( unsigned long ulNewIPL ) +{ + __asm( + "MVFC PSW, R5 \n" \ + "SHLL #28, R1 \n" \ + "AND #-0F000001H, R5 \n" \ + "OR R1, R5 \n" \ + "MVTC R5, PSW \n" \ + "RTS " + ); +} +/*-----------------------------------------------------------*/ + + + diff --git a/Source/portable/GCC/RX600/portmacro.h b/Source/portable/GCC/RX600/portmacro.h new file mode 100644 index 000000000..592cfcee9 --- /dev/null +++ b/Source/portable/GCC/RX600/portmacro.h @@ -0,0 +1,136 @@ +/* + FreeRTOS V6.0.5 - Copyright (C) 2010 Real Time Engineers Ltd. + + *************************************************************************** + * * + * If you are: * + * * + * + New to FreeRTOS, * + * + Wanting to learn FreeRTOS or multitasking in general quickly * + * + Looking for basic training, * + * + Wanting to improve your FreeRTOS skills and productivity * + * * + * then take a look at the FreeRTOS eBook * + * * + * "Using the FreeRTOS Real Time Kernel - a Practical Guide" * + * http://www.FreeRTOS.org/Documentation * + * * + * A pdf reference manual is also available. Both are usually delivered * + * to your inbox within 20 minutes to two hours when purchased between 8am * + * and 8pm GMT (although please allow up to 24 hours in case of * + * exceptional circumstances). Thank you for your support! * + * * + *************************************************************************** + + This file is part of the FreeRTOS distribution. + + FreeRTOS is free software; you can redistribute it and/or modify it under + the terms of the GNU General Public License (version 2) as published by the + Free Software Foundation AND MODIFIED BY the FreeRTOS exception. + ***NOTE*** The exception to the GPL is included to allow you to distribute + a combined work that includes FreeRTOS without being obliged to provide the + source code for proprietary components outside of the FreeRTOS kernel. + FreeRTOS is distributed in the hope that it will be useful, but WITHOUT + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + more details. You should have received a copy of the GNU General Public + License and the FreeRTOS license exception along with FreeRTOS; if not it + can be viewed here: http://www.freertos.org/a00114.html and also obtained + by writing to Richard Barry, contact details for whom are available on the + FreeRTOS WEB site. + + 1 tab == 4 spaces! + + http://www.FreeRTOS.org - Documentation, latest information, license and + contact details. + + http://www.SafeRTOS.com - A version that is certified for use in safety + critical systems. + + http://www.OpenRTOS.com - Commercial support, development, porting, + licensing and training services. +*/ + + +#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 unsigned portLONG +#define portBASE_TYPE long + +#if( configUSE_16_BIT_TICKS == 1 ) + typedef unsigned portSHORT portTickType; + #define portMAX_DELAY ( portTickType ) 0xffff +#else + typedef unsigned portLONG portTickType; + #define portMAX_DELAY ( portTickType ) 0xffffffff +#endif +/*-----------------------------------------------------------*/ + +/* Hardware specifics. */ +#define portBYTE_ALIGNMENT 8 /* Could make four, according to manual. */ +#define portSTACK_GROWTH -1 +#define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ ) +#define portNOP() __asm( "NOP" ) + +/* The location of the software interrupt register. Software interrupts use +vector 27. */ +#define portITU_SWINTR ( ( unsigned char * ) 0x000872E0 ) +#define portYIELD() *portITU_SWINTR = 0x01; portNOP(); portNOP(); portNOP(); portNOP(); portNOP() +#define portYIELD_FROM_ISR( x ) if( x != pdFALSE ) portYIELD() + +/* + * These macros should be called directly, but through the taskENTER_CRITICAL() + * and taskEXIT_CRITICAL() macros. + */ +#define portENABLE_INTERRUPTS() __asm ( "MVTIPL #0" ); +#define portDISABLE_INTERRUPTS() __asm ( "MVTIPL %0" ::"i"(configMAX_SYSCALL_INTERRUPT_PRIORITY) ) + +/* Critical nesting counts are stored in the TCB. */ +#define portCRITICAL_NESTING_IN_TCB ( 1 ) + +/* The critical nesting functions defined within tasks.c. */ +extern void vTaskEnterCritical( void ); +extern void vTaskExitCritical( void ); +#define portENTER_CRITICAL() vTaskEnterCritical(); +#define portEXIT_CRITICAL() vTaskExitCritical(); + +/* As this port allows interrupt nesting... */ +unsigned long ulPortGetIPL( void ) __attribute__((naked)); +void vPortSetIPL( unsigned long ulNewIPL ) __attribute__((naked)); +#define portSET_INTERRUPT_MASK_FROM_ISR() ulPortGetIPL(); portDISABLE_INTERRUPTS() +#define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus ) vPortSetIPL( uxSavedInterruptStatus ) + +/*-----------------------------------------------------------*/ + +/* 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 */ +