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Update to V4.5.0 files and directory structure.

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This commit is contained in:
Richard Barry 2007-09-17 10:07:48 +00:00
parent 1362bebfdc
commit 98a9959a44
758 changed files with 53177 additions and 3139 deletions
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85
Source/portable/GCC/ARM_CM3/port.c
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@ -1,5 +1,5 @@
/*
FreeRTOS.org V4.4.0 - Copyright (C) 2003-2007 Richard Barry.
FreeRTOS.org V4.5.0 - Copyright (C) 2003-2007 Richard Barry.
This file is part of the FreeRTOS.org distribution.
@ -38,6 +38,11 @@
+ Reduced the code used to setup the initial stack frame.
+ The kernel no longer has to install or handle the fault interrupt.
Change from V4.4.0:
+ Introduced usage of configKERNEL_INTERRUPT_PRIORITY macro to set the
interrupt priority used by the kernel.
*/
@ -49,23 +54,32 @@
#include "FreeRTOS.h"
#include "task.h"
/* For backward compatibility, ensure configKERNEL_INTERRUPT_PRIORITY is
defined. The value should also ensure backward compatibility.
FreeRTOS.org versions prior to V4.4.0 did not include this definition. */
#ifndef configKERNEL_INTERRUPT_PRIORITY
#define configKERNEL_INTERRUPT_PRIORITY 255
#endif
/* Constants required to manipulate the NVIC. */
#define portNVIC_SYSTICK_CTRL ( ( volatile unsigned portLONG *) 0xe000e010 )
#define portNVIC_SYSTICK_LOAD ( ( volatile unsigned portLONG *) 0xe000e014 )
#define portNVIC_INT_CTRL ( ( volatile unsigned portLONG *) 0xe000ed04 )
#define portNVIC_SYSPRI2 ( ( volatile unsigned portLONG *) 0xe000ed20 )
#define portNVIC_SYSPRI1 ( ( volatile unsigned portLONG *) 0xe000ed1c )
#define portNVIC_SYSTICK_CLK 0x00000004
#define portNVIC_SYSTICK_INT 0x00000002
#define portNVIC_SYSTICK_ENABLE 0x00000001
#define portNVIC_PENDSVSET 0x10000000
#define portNVIC_PENDSV_PRI 0x00ff0000
#define portNVIC_SVCALL_PRI 0xff000000
#define portNVIC_SYSTICK_PRI 0xff000000
#define portNVIC_PENDSV_PRI ( ( ( unsigned portLONG ) configKERNEL_INTERRUPT_PRIORITY ) << 16 )
#define portNVIC_SYSTICK_PRI ( ( ( unsigned portLONG ) configKERNEL_INTERRUPT_PRIORITY ) << 24 )
/* Constants required to set up the initial stack. */
#define portINITIAL_XPSR ( 0x01000000 )
/* The priority used by the kernel is assigned to a variable to make access
from inline assembler easier. */
const unsigned portLONG ulKernelPriority = configKERNEL_INTERRUPT_PRIORITY;
/* Each task maintains its own interrupt status in the critical nesting
variable. */
unsigned portBASE_TYPE uxCriticalNesting = 0xaaaaaaaa;
@ -100,7 +114,7 @@ portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) pxCode; /* PC */
pxTopOfStack--;
*pxTopOfStack = 0xfffffffd; /* LR */
*pxTopOfStack = 0; /* LR */
pxTopOfStack -= 5; /* R12, R3, R2 and R1. */
*pxTopOfStack = ( portSTACK_TYPE ) pvParameters; /* R0 */
pxTopOfStack -= 9; /* R11, R10, R9, R8, R7, R6, R5 and R4. */
@ -129,7 +143,7 @@ void prvSetMSP( unsigned long ulValue )
*/
portBASE_TYPE xPortStartScheduler( void )
{
/* Make PendSV, CallSV and SysTick the lowest priority interrupts. */
/* Make PendSV, CallSV and SysTick the same priroity as the kernel. */
*(portNVIC_SYSPRI2) |= portNVIC_PENDSV_PRI;
*(portNVIC_SYSPRI2) |= portNVIC_SYSTICK_PRI;
@ -193,33 +207,26 @@ void xPortPendSVHandler( void )
" mrs r0, psp \n"
" cbz r0, no_save \n"
" \n" /* Save the context into the TCB. */
" sub r0, #0x20 \n"
" stm r0, {r4-r11} \n"
" nop \n"
" stmdb r0!, {r4-r11} \n"
" sub r0, #0x04 \n"
" ldr r1, uxCriticalNestingConst \n"
" ldr r2, pxCurrentTCBConst \n"
" ldr r1, [r1] \n"
" stm r0, {r1} \n"
" ldr r1, pxCurrentTCBConst \n"
" ldr r1, [r1] \n"
" str r0, [r1] \n"
" ldr r2, [r2] \n"
" str r1, [r0] \n"
" str r0, [r2] \n"
" \n"
"no_save:\n"
" ldr r0, vTaskSwitchContextConst \n" /* Find the task to execute. */
" push {r14} \n"
" cpsid i \n"
" blx r0 \n"
" cpsie i \n"
" bl vPortSwitchContext \n"
" pop {r14} \n"
" \n" /* Restore the context. */
" ldr r1, pxCurrentTCBConst \n"
" ldr r1, [r1] \n"
" ldr r0, [r1] \n"
" ldm r0, {r1, r4-r11} \n"
" nop \n"
" ldmia r0!, {r1, r4-r11} \n"
" ldr r2, uxCriticalNestingConst \n"
" str r1, [r2] \n"
" add r0, #0x24 \n"
" msr psp, r0 \n"
" orr r14, #0xd \n"
" \n" /* Exit with interrupts in the state required by the task. */
@ -227,11 +234,12 @@ void xPortPendSVHandler( void )
" bx r14 \n"
" \n"
"sv_disable_interrupts: \n"
" cpsid i \n"
" ldr r1, =ulKernelPriority \n"
" ldr r1, [r1] \n"
" msr basepri, r1 \n"
" bx r14 \n"
" \n"
" .align 2 \n"
"vTaskSwitchContextConst: .word vTaskSwitchContext \n"
"pxCurrentTCBConst: .word pxCurrentTCB \n"
"uxCriticalNestingConst: .word uxCriticalNesting \n"
);
@ -246,11 +254,8 @@ void xPortSysTickHandler( void )
/* Call the scheduler tick function. */
__asm volatile
(
" ldr r0, vTaskIncrementTickConst \n"
" push {r14} \n"
" cpsid i \n"
" blx r0 \n"
" cpsie i \n"
" bl vPortIncrementTick \n"
" pop {r14}"
);
@ -259,8 +264,7 @@ void xPortSysTickHandler( void )
__asm volatile
(
" push {r14} \n"
" ldr r0, vPortYieldFromISRConst2 \n"
" blx r0 \n"
" bl vPortYieldFromISR \n"
" pop {r14}"
);
#endif
@ -277,12 +281,12 @@ void xPortSysTickHandler( void )
__asm volatile
(
"tick_disable_interrupts: \n"
" cpsid i \n"
" ldr r1, =ulKernelPriority \n"
" ldr r1, [r1] \n"
" msr basepri, r1 \n"
" bx r14 \n"
" \n"
" .align 2 \n"
"vPortYieldFromISRConst2: .word vPortYieldFromISR\n"
"vTaskIncrementTickConst: .word vTaskIncrementTick\n"
"uxCriticalNestingConst2: .word uxCriticalNesting"
);
}
@ -298,5 +302,22 @@ void prvSetupTimerInterrupt( void )
*(portNVIC_SYSTICK_LOAD) = configCPU_CLOCK_HZ / configTICK_RATE_HZ;
*(portNVIC_SYSTICK_CTRL) = portNVIC_SYSTICK_CLK | portNVIC_SYSTICK_INT | portNVIC_SYSTICK_ENABLE;
}
/*-----------------------------------------------------------*/
void vPortSwitchContext( void )
{
vPortSetInterruptMask();
vTaskSwitchContext();
vPortClearInterruptMask();
}
/*-----------------------------------------------------------*/
void vPortIncrementTick( void )
{
vPortSetInterruptMask();
vTaskIncrementTick();
vPortClearInterruptMask();
}
/*-----------------------------------------------------------*/