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portable/IAR/ARM_CM4F_MPU/port.c Executable file → Normal file
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@ -232,44 +232,47 @@ extern void vPortRestoreContextOfFirstTask( void ) PRIVILEGED_FUNCTION;
#if ( configUSE_MPU_WRAPPERS_V1 == 0 )
/**
* @brief Sets up the system call stack so that upon returning from
* SVC, the system call stack is used.
*
* It is used for the system calls with up to 4 parameters.
*
* @param pulTaskStack The current SP when the SVC was raised.
* @param ulLR The value of Link Register (EXC_RETURN) in the SVC handler.
*/
void vSystemCallEnter( uint32_t * pulTaskStack, uint32_t ulLR ) PRIVILEGED_FUNCTION;
/**
* @brief Sets up the system call stack so that upon returning from
* SVC, the system call stack is used.
*
* It is used for the system calls with up to 4 parameters.
*
* @param pulTaskStack The current SP when the SVC was raised.
* @param ulLR The value of Link Register (EXC_RETURN) in the SVC handler.
*/
void vSystemCallEnter( uint32_t * pulTaskStack,
uint32_t ulLR ) PRIVILEGED_FUNCTION;
#endif /* #if ( configUSE_MPU_WRAPPERS_V1 == 0 ) */
#if ( configUSE_MPU_WRAPPERS_V1 == 0 )
/**
* @brief Sets up the system call stack so that upon returning from
* SVC, the system call stack is used.
*
* It is used for the system calls with 5 parameters.
*
* @param pulTaskStack The current SP when the SVC was raised.
* @param ulLR The value of Link Register (EXC_RETURN) in the SVC handler.
*/
void vSystemCallEnter_1( uint32_t * pulTaskStack, uint32_t ulLR ) PRIVILEGED_FUNCTION;
/**
* @brief Sets up the system call stack so that upon returning from
* SVC, the system call stack is used.
*
* It is used for the system calls with 5 parameters.
*
* @param pulTaskStack The current SP when the SVC was raised.
* @param ulLR The value of Link Register (EXC_RETURN) in the SVC handler.
*/
void vSystemCallEnter_1( uint32_t * pulTaskStack,
uint32_t ulLR ) PRIVILEGED_FUNCTION;
#endif /* #if ( configUSE_MPU_WRAPPERS_V1 == 0 ) */
#if ( configUSE_MPU_WRAPPERS_V1 == 0 )
/**
* @brief Sets up the task stack so that upon returning from
* SVC, the task stack is used again.
*
* @param pulSystemCallStack The current SP when the SVC was raised.
* @param ulLR The value of Link Register (EXC_RETURN) in the SVC handler.
*/
void vSystemCallExit( uint32_t * pulSystemCallStack, uint32_t ulLR ) PRIVILEGED_FUNCTION;
/**
* @brief Sets up the task stack so that upon returning from
* SVC, the task stack is used again.
*
* @param pulSystemCallStack The current SP when the SVC was raised.
* @param ulLR The value of Link Register (EXC_RETURN) in the SVC handler.
*/
void vSystemCallExit( uint32_t * pulSystemCallStack,
uint32_t ulLR ) PRIVILEGED_FUNCTION;
#endif /* #if ( configUSE_MPU_WRAPPERS_V1 == 0 ) */
@ -318,25 +321,26 @@ StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
xMPUSettings->ulTaskFlags &= ( ~portTASK_IS_PRIVILEGED_FLAG );
xMPUSettings->ulContext[ 0 ] = portINITIAL_CONTROL_IF_UNPRIVILEGED;
}
xMPUSettings->ulContext[ 1 ] = 0x04040404; /* r4. */
xMPUSettings->ulContext[ 2 ] = 0x05050505; /* r5. */
xMPUSettings->ulContext[ 3 ] = 0x06060606; /* r6. */
xMPUSettings->ulContext[ 4 ] = 0x07070707; /* r7. */
xMPUSettings->ulContext[ 5 ] = 0x08080808; /* r8. */
xMPUSettings->ulContext[ 6 ] = 0x09090909; /* r9. */
xMPUSettings->ulContext[ 7 ] = 0x10101010; /* r10. */
xMPUSettings->ulContext[ 8 ] = 0x11111111; /* r11. */
xMPUSettings->ulContext[ 9 ] = portINITIAL_EXC_RETURN; /* EXC_RETURN. */
xMPUSettings->ulContext[ 10 ] = ( uint32_t ) ( pxTopOfStack - 8 ); /* PSP with the hardware saved stack. */
xMPUSettings->ulContext[ 11 ] = ( uint32_t ) pvParameters; /* r0. */
xMPUSettings->ulContext[ 12 ] = 0x01010101; /* r1. */
xMPUSettings->ulContext[ 13 ] = 0x02020202; /* r2. */
xMPUSettings->ulContext[ 14 ] = 0x03030303; /* r3. */
xMPUSettings->ulContext[ 15 ] = 0x12121212; /* r12. */
xMPUSettings->ulContext[ 16 ] = 0; /* LR. */
xMPUSettings->ulContext[ 1 ] = 0x04040404; /* r4. */
xMPUSettings->ulContext[ 2 ] = 0x05050505; /* r5. */
xMPUSettings->ulContext[ 3 ] = 0x06060606; /* r6. */
xMPUSettings->ulContext[ 4 ] = 0x07070707; /* r7. */
xMPUSettings->ulContext[ 5 ] = 0x08080808; /* r8. */
xMPUSettings->ulContext[ 6 ] = 0x09090909; /* r9. */
xMPUSettings->ulContext[ 7 ] = 0x10101010; /* r10. */
xMPUSettings->ulContext[ 8 ] = 0x11111111; /* r11. */
xMPUSettings->ulContext[ 9 ] = portINITIAL_EXC_RETURN; /* EXC_RETURN. */
xMPUSettings->ulContext[ 10 ] = ( uint32_t ) ( pxTopOfStack - 8 ); /* PSP with the hardware saved stack. */
xMPUSettings->ulContext[ 11 ] = ( uint32_t ) pvParameters; /* r0. */
xMPUSettings->ulContext[ 12 ] = 0x01010101; /* r1. */
xMPUSettings->ulContext[ 13 ] = 0x02020202; /* r2. */
xMPUSettings->ulContext[ 14 ] = 0x03030303; /* r3. */
xMPUSettings->ulContext[ 15 ] = 0x12121212; /* r12. */
xMPUSettings->ulContext[ 16 ] = 0; /* LR. */
xMPUSettings->ulContext[ 17 ] = ( ( uint32_t ) pxCode ) & portSTART_ADDRESS_MASK; /* PC. */
xMPUSettings->ulContext[ 18 ] = portINITIAL_XPSR; /* xPSR. */
xMPUSettings->ulContext[ 18 ] = portINITIAL_XPSR; /* xPSR. */
#if ( configUSE_MPU_WRAPPERS_V1 == 0 )
{
@ -416,7 +420,7 @@ void vPortSVCHandler_C( uint32_t * pulParam ) /* PRIVILEGED_FUNCTION */
::: "r1", "memory"
);
break;
#endif /* #if( configENFORCE_SYSTEM_CALLS_FROM_KERNEL_ONLY == 1 ) */
#endif /* #if( configENFORCE_SYSTEM_CALLS_FROM_KERNEL_ONLY == 1 ) */
default: /* Unknown SVC call. */
break;
@ -426,288 +430,299 @@ void vPortSVCHandler_C( uint32_t * pulParam ) /* PRIVILEGED_FUNCTION */
#if ( configUSE_MPU_WRAPPERS_V1 == 0 )
void vSystemCallEnter( uint32_t * pulTaskStack, uint32_t ulLR ) /* PRIVILEGED_FUNCTION */
{
extern TaskHandle_t pxCurrentTCB;
xMPU_SETTINGS * pxMpuSettings;
uint32_t * pulSystemCallStack;
uint32_t ulStackFrameSize, ulSystemCallLocation, i;
#if defined( __ARMCC_VERSION )
/* Declaration when these variable are defined in code instead of being
* exported from linker scripts. */
extern uint32_t * __syscalls_flash_start__;
extern uint32_t * __syscalls_flash_end__;
#else
/* Declaration when these variable are exported from linker scripts. */
extern uint32_t __syscalls_flash_start__[];
extern uint32_t __syscalls_flash_end__[];
#endif /* #if defined( __ARMCC_VERSION ) */
ulSystemCallLocation = pulTaskStack[ portOFFSET_TO_PC ];
/* If the request did not come from the system call section, do nothing. */
if( ( ulSystemCallLocation >= ( uint32_t ) __syscalls_flash_start__ ) &&
( ulSystemCallLocation <= ( uint32_t ) __syscalls_flash_end__ ) )
void vSystemCallEnter( uint32_t * pulTaskStack,
uint32_t ulLR ) /* PRIVILEGED_FUNCTION */
{
pxMpuSettings = xTaskGetMPUSettings( pxCurrentTCB );
pulSystemCallStack = pxMpuSettings->xSystemCallStackInfo.pulSystemCallStack;
extern TaskHandle_t pxCurrentTCB;
xMPU_SETTINGS * pxMpuSettings;
uint32_t * pulSystemCallStack;
uint32_t ulStackFrameSize, ulSystemCallLocation, i;
/* This is not NULL only for the duration of the system call. */
configASSERT( pxMpuSettings->xSystemCallStackInfo.pulTaskStack == NULL );
#if defined( __ARMCC_VERSION )
if( ( ulLR & portEXC_RETURN_STACK_FRAME_TYPE_MASK ) == 0UL )
/* Declaration when these variable are defined in code instead of being
* exported from linker scripts. */
extern uint32_t * __syscalls_flash_start__;
extern uint32_t * __syscalls_flash_end__;
#else
/* Declaration when these variable are exported from linker scripts. */
extern uint32_t __syscalls_flash_start__[];
extern uint32_t __syscalls_flash_end__[];
#endif /* #if defined( __ARMCC_VERSION ) */
ulSystemCallLocation = pulTaskStack[ portOFFSET_TO_PC ];
/* If the request did not come from the system call section, do nothing. */
if( ( ulSystemCallLocation >= ( uint32_t ) __syscalls_flash_start__ ) &&
( ulSystemCallLocation <= ( uint32_t ) __syscalls_flash_end__ ) )
{
/* Extended frame i.e. FPU in use. */
ulStackFrameSize = 26;
pxMpuSettings = xTaskGetMPUSettings( pxCurrentTCB );
pulSystemCallStack = pxMpuSettings->xSystemCallStackInfo.pulSystemCallStack;
/* This is not NULL only for the duration of the system call. */
configASSERT( pxMpuSettings->xSystemCallStackInfo.pulTaskStack == NULL );
if( ( ulLR & portEXC_RETURN_STACK_FRAME_TYPE_MASK ) == 0UL )
{
/* Extended frame i.e. FPU in use. */
ulStackFrameSize = 26;
__asm volatile (
" vpush {s0} \n" /* Trigger lazy stacking. */
" vpop {s0} \n" /* Nullify the affect of the above instruction. */
::: "memory"
);
}
else
{
/* Standard frame i.e. FPU not in use. */
ulStackFrameSize = 8;
}
/* Make space on the system call stack for the stack frame. */
pulSystemCallStack = pulSystemCallStack - ulStackFrameSize;
/* Copy the stack frame. */
for( i = 0; i < ulStackFrameSize; i++ )
{
pulSystemCallStack[ i ] = pulTaskStack[ i ];
}
/* Use the pulSystemCallStack in thread mode. */
__asm volatile ( "msr psp, %0" : : "r" ( pulSystemCallStack ) );
/* Raise the privilege for the duration of the system call. */
__asm volatile (
" vpush {s0} \n" /* Trigger lazy stacking. */
" vpop {s0} \n" /* Nullify the affect of the above instruction. */
::: "memory"
);
" mrs r1, control \n" /* Obtain current control value. */
" bic r1, #1 \n" /* Clear nPRIV bit. */
" msr control, r1 \n" /* Write back new control value. */
::: "r1", "memory"
);
/* Remember the location where we should copy the stack frame when we exit from
* the system call. */
pxMpuSettings->xSystemCallStackInfo.pulTaskStack = pulTaskStack + ulStackFrameSize;
/* Store the value of the Link Register before the SVC was raised. We need to
* restore it when we exit from the system call. */
pxMpuSettings->xSystemCallStackInfo.ulLinkRegisterAtSystemCallEntry = pulTaskStack[ portOFFSET_TO_LR ];
/* Record if the hardware used padding to force the stack pointer
* to be double word aligned. */
if( ( pulTaskStack[ portOFFSET_TO_PSR ] & portPSR_STACK_PADDING_MASK ) == portPSR_STACK_PADDING_MASK )
{
pxMpuSettings->ulTaskFlags |= portSTACK_FRAME_HAS_PADDING_FLAG;
}
else
{
pxMpuSettings->ulTaskFlags &= ( ~portSTACK_FRAME_HAS_PADDING_FLAG );
}
/* We ensure in pxPortInitialiseStack that the system call stack is
* double word aligned and therefore, there is no need of padding.
* Clear the bit[9] of stacked xPSR. */
pulSystemCallStack[ portOFFSET_TO_PSR ] &= ( ~portPSR_STACK_PADDING_MASK );
}
else
{
/* Standard frame i.e. FPU not in use. */
ulStackFrameSize = 8;
}
/* Make space on the system call stack for the stack frame. */
pulSystemCallStack = pulSystemCallStack - ulStackFrameSize;
/* Copy the stack frame. */
for( i = 0; i < ulStackFrameSize; i++ )
{
pulSystemCallStack[ i ] = pulTaskStack[ i ];
}
/* Use the pulSystemCallStack in thread mode. */
__asm volatile ( "msr psp, %0" : : "r" ( pulSystemCallStack ) );
/* Raise the privilege for the duration of the system call. */
__asm volatile (
" mrs r1, control \n" /* Obtain current control value. */
" bic r1, #1 \n" /* Clear nPRIV bit. */
" msr control, r1 \n" /* Write back new control value. */
::: "r1", "memory"
);
/* Remember the location where we should copy the stack frame when we exit from
* the system call. */
pxMpuSettings->xSystemCallStackInfo.pulTaskStack = pulTaskStack + ulStackFrameSize;
/* Store the value of the Link Register before the SVC was raised. We need to
* restore it when we exit from the system call. */
pxMpuSettings->xSystemCallStackInfo.ulLinkRegisterAtSystemCallEntry = pulTaskStack[ portOFFSET_TO_LR ];
/* Record if the hardware used padding to force the stack pointer
* to be double word aligned. */
if( ( pulTaskStack[ portOFFSET_TO_PSR ] & portPSR_STACK_PADDING_MASK ) == portPSR_STACK_PADDING_MASK )
{
pxMpuSettings->ulTaskFlags |= portSTACK_FRAME_HAS_PADDING_FLAG;
}
else
{
pxMpuSettings->ulTaskFlags &= ( ~portSTACK_FRAME_HAS_PADDING_FLAG );
}
/* We ensure in pxPortInitialiseStack that the system call stack is
* double word aligned and therefore, there is no need of padding.
* Clear the bit[9] of stacked xPSR. */
pulSystemCallStack[ portOFFSET_TO_PSR ] &= ( ~portPSR_STACK_PADDING_MASK );
}
}
#endif /* #if ( configUSE_MPU_WRAPPERS_V1 == 0 ) */
/*-----------------------------------------------------------*/
#if ( configUSE_MPU_WRAPPERS_V1 == 0 )
void vSystemCallEnter_1( uint32_t * pulTaskStack, uint32_t ulLR ) /* PRIVILEGED_FUNCTION */
{
extern TaskHandle_t pxCurrentTCB;
xMPU_SETTINGS * pxMpuSettings;
uint32_t * pulSystemCallStack;
uint32_t ulStackFrameSize, ulSystemCallLocation, i;
#if defined( __ARMCC_VERSION )
/* Declaration when these variable are defined in code instead of being
* exported from linker scripts. */
extern uint32_t * __syscalls_flash_start__;
extern uint32_t * __syscalls_flash_end__;
#else
/* Declaration when these variable are exported from linker scripts. */
extern uint32_t __syscalls_flash_start__[];
extern uint32_t __syscalls_flash_end__[];
#endif /* #if defined( __ARMCC_VERSION ) */
ulSystemCallLocation = pulTaskStack[ portOFFSET_TO_PC ];
/* If the request did not come from the system call section, do nothing. */
if( ( ulSystemCallLocation >= ( uint32_t ) __syscalls_flash_start__ ) &&
( ulSystemCallLocation <= ( uint32_t ) __syscalls_flash_end__ ) )
void vSystemCallEnter_1( uint32_t * pulTaskStack,
uint32_t ulLR ) /* PRIVILEGED_FUNCTION */
{
pxMpuSettings = xTaskGetMPUSettings( pxCurrentTCB );
pulSystemCallStack = pxMpuSettings->xSystemCallStackInfo.pulSystemCallStack;
extern TaskHandle_t pxCurrentTCB;
xMPU_SETTINGS * pxMpuSettings;
uint32_t * pulSystemCallStack;
uint32_t ulStackFrameSize, ulSystemCallLocation, i;
/* This is not NULL only for the duration of the system call. */
configASSERT( pxMpuSettings->xSystemCallStackInfo.pulTaskStack == NULL );
#if defined( __ARMCC_VERSION )
if( ( ulLR & portEXC_RETURN_STACK_FRAME_TYPE_MASK ) == 0UL )
/* Declaration when these variable are defined in code instead of being
* exported from linker scripts. */
extern uint32_t * __syscalls_flash_start__;
extern uint32_t * __syscalls_flash_end__;
#else
/* Declaration when these variable are exported from linker scripts. */
extern uint32_t __syscalls_flash_start__[];
extern uint32_t __syscalls_flash_end__[];
#endif /* #if defined( __ARMCC_VERSION ) */
ulSystemCallLocation = pulTaskStack[ portOFFSET_TO_PC ];
/* If the request did not come from the system call section, do nothing. */
if( ( ulSystemCallLocation >= ( uint32_t ) __syscalls_flash_start__ ) &&
( ulSystemCallLocation <= ( uint32_t ) __syscalls_flash_end__ ) )
{
/* Extended frame i.e. FPU in use. */
ulStackFrameSize = 26;
pxMpuSettings = xTaskGetMPUSettings( pxCurrentTCB );
pulSystemCallStack = pxMpuSettings->xSystemCallStackInfo.pulSystemCallStack;
/* This is not NULL only for the duration of the system call. */
configASSERT( pxMpuSettings->xSystemCallStackInfo.pulTaskStack == NULL );
if( ( ulLR & portEXC_RETURN_STACK_FRAME_TYPE_MASK ) == 0UL )
{
/* Extended frame i.e. FPU in use. */
ulStackFrameSize = 26;
__asm volatile (
" vpush {s0} \n" /* Trigger lazy stacking. */
" vpop {s0} \n" /* Nullify the affect of the above instruction. */
::: "memory"
);
}
else
{
/* Standard frame i.e. FPU not in use. */
ulStackFrameSize = 8;
}
/* Make space on the system call stack for the stack frame and
* the parameter passed on the stack. We only need to copy one
* parameter but we still reserve 2 spaces to keep the stack
* double word aligned. */
pulSystemCallStack = pulSystemCallStack - ulStackFrameSize - 2UL;
/* Copy the stack frame. */
for( i = 0; i < ulStackFrameSize; i++ )
{
pulSystemCallStack[ i ] = pulTaskStack[ i ];
}
/* Copy the parameter which is passed the stack. */
if( ( pulTaskStack[ portOFFSET_TO_PSR ] & portPSR_STACK_PADDING_MASK ) == portPSR_STACK_PADDING_MASK )
{
pulSystemCallStack[ ulStackFrameSize ] = pulTaskStack[ ulStackFrameSize + 1 ];
/* Record if the hardware used padding to force the stack pointer
* to be double word aligned. */
pxMpuSettings->ulTaskFlags |= portSTACK_FRAME_HAS_PADDING_FLAG;
}
else
{
pulSystemCallStack[ ulStackFrameSize ] = pulTaskStack[ ulStackFrameSize ];
/* Record if the hardware used padding to force the stack pointer
* to be double word aligned. */
pxMpuSettings->ulTaskFlags &= ( ~portSTACK_FRAME_HAS_PADDING_FLAG );
}
/* Use the pulSystemCallStack in thread mode. */
__asm volatile ( "msr psp, %0" : : "r" ( pulSystemCallStack ) );
/* Raise the privilege for the duration of the system call. */
__asm volatile (
" vpush {s0} \n" /* Trigger lazy stacking. */
" vpop {s0} \n" /* Nullify the affect of the above instruction. */
::: "memory"
);
" mrs r1, control \n" /* Obtain current control value. */
" bic r1, #1 \n" /* Clear nPRIV bit. */
" msr control, r1 \n" /* Write back new control value. */
::: "r1", "memory"
);
/* Remember the location where we should copy the stack frame when we exit from
* the system call. */
pxMpuSettings->xSystemCallStackInfo.pulTaskStack = pulTaskStack + ulStackFrameSize;
/* Store the value of the Link Register before the SVC was raised. We need to
* restore it when we exit from the system call. */
pxMpuSettings->xSystemCallStackInfo.ulLinkRegisterAtSystemCallEntry = pulTaskStack[ portOFFSET_TO_LR ];
/* We ensure in pxPortInitialiseStack that the system call stack is
* double word aligned and therefore, there is no need of padding.
* Clear the bit[9] of stacked xPSR. */
pulSystemCallStack[ portOFFSET_TO_PSR ] &= ( ~portPSR_STACK_PADDING_MASK );
}
else
{
/* Standard frame i.e. FPU not in use. */
ulStackFrameSize = 8;
}
/* Make space on the system call stack for the stack frame and
* the parameter passed on the stack. We only need to copy one
* parameter but we still reserve 2 spaces to keep the stack
* double word aligned. */
pulSystemCallStack = pulSystemCallStack - ulStackFrameSize - 2UL;
/* Copy the stack frame. */
for( i = 0; i < ulStackFrameSize; i++ )
{
pulSystemCallStack[ i ] = pulTaskStack[ i ];
}
/* Copy the parameter which is passed the stack. */
if( ( pulTaskStack[ portOFFSET_TO_PSR ] & portPSR_STACK_PADDING_MASK ) == portPSR_STACK_PADDING_MASK )
{
pulSystemCallStack[ ulStackFrameSize ] = pulTaskStack[ ulStackFrameSize + 1 ];
/* Record if the hardware used padding to force the stack pointer
* to be double word aligned. */
pxMpuSettings->ulTaskFlags |= portSTACK_FRAME_HAS_PADDING_FLAG;
}
else
{
pulSystemCallStack[ ulStackFrameSize ] = pulTaskStack[ ulStackFrameSize ];
/* Record if the hardware used padding to force the stack pointer
* to be double word aligned. */
pxMpuSettings->ulTaskFlags &= ( ~portSTACK_FRAME_HAS_PADDING_FLAG );
}
/* Use the pulSystemCallStack in thread mode. */
__asm volatile ( "msr psp, %0" : : "r" ( pulSystemCallStack ) );
/* Raise the privilege for the duration of the system call. */
__asm volatile (
" mrs r1, control \n" /* Obtain current control value. */
" bic r1, #1 \n" /* Clear nPRIV bit. */
" msr control, r1 \n" /* Write back new control value. */
::: "r1", "memory"
);
/* Remember the location where we should copy the stack frame when we exit from
* the system call. */
pxMpuSettings->xSystemCallStackInfo.pulTaskStack = pulTaskStack + ulStackFrameSize;
/* Store the value of the Link Register before the SVC was raised. We need to
* restore it when we exit from the system call. */
pxMpuSettings->xSystemCallStackInfo.ulLinkRegisterAtSystemCallEntry = pulTaskStack[ portOFFSET_TO_LR ];
/* We ensure in pxPortInitialiseStack that the system call stack is
* double word aligned and therefore, there is no need of padding.
* Clear the bit[9] of stacked xPSR. */
pulSystemCallStack[ portOFFSET_TO_PSR ] &= ( ~portPSR_STACK_PADDING_MASK );
}
}
#endif /* #if ( configUSE_MPU_WRAPPERS_V1 == 0 ) */
/*-----------------------------------------------------------*/
#if ( configUSE_MPU_WRAPPERS_V1 == 0 )
void vSystemCallExit( uint32_t * pulSystemCallStack, uint32_t ulLR ) /* PRIVILEGED_FUNCTION */
{
extern TaskHandle_t pxCurrentTCB;
xMPU_SETTINGS * pxMpuSettings;
uint32_t * pulTaskStack;
uint32_t ulStackFrameSize, ulSystemCallLocation, i;
#if defined( __ARMCC_VERSION )
/* Declaration when these variable are defined in code instead of being
* exported from linker scripts. */
extern uint32_t * __syscalls_flash_start__;
extern uint32_t * __syscalls_flash_end__;
#else
/* Declaration when these variable are exported from linker scripts. */
extern uint32_t __syscalls_flash_start__[];
extern uint32_t __syscalls_flash_end__[];
#endif /* #if defined( __ARMCC_VERSION ) */
ulSystemCallLocation = pulSystemCallStack[ portOFFSET_TO_PC ];
/* If the request did not come from the system call section, do nothing. */
if( ( ulSystemCallLocation >= ( uint32_t ) __syscalls_flash_start__ ) &&
( ulSystemCallLocation <= ( uint32_t ) __syscalls_flash_end__ ) )
void vSystemCallExit( uint32_t * pulSystemCallStack,
uint32_t ulLR ) /* PRIVILEGED_FUNCTION */
{
pxMpuSettings = xTaskGetMPUSettings( pxCurrentTCB );
pulTaskStack = pxMpuSettings->xSystemCallStackInfo.pulTaskStack;
extern TaskHandle_t pxCurrentTCB;
xMPU_SETTINGS * pxMpuSettings;
uint32_t * pulTaskStack;
uint32_t ulStackFrameSize, ulSystemCallLocation, i;
if( ( ulLR & portEXC_RETURN_STACK_FRAME_TYPE_MASK ) == 0UL )
#if defined( __ARMCC_VERSION )
/* Declaration when these variable are defined in code instead of being
* exported from linker scripts. */
extern uint32_t * __syscalls_flash_start__;
extern uint32_t * __syscalls_flash_end__;
#else
/* Declaration when these variable are exported from linker scripts. */
extern uint32_t __syscalls_flash_start__[];
extern uint32_t __syscalls_flash_end__[];
#endif /* #if defined( __ARMCC_VERSION ) */
ulSystemCallLocation = pulSystemCallStack[ portOFFSET_TO_PC ];
/* If the request did not come from the system call section, do nothing. */
if( ( ulSystemCallLocation >= ( uint32_t ) __syscalls_flash_start__ ) &&
( ulSystemCallLocation <= ( uint32_t ) __syscalls_flash_end__ ) )
{
/* Extended frame i.e. FPU in use. */
ulStackFrameSize = 26;
pxMpuSettings = xTaskGetMPUSettings( pxCurrentTCB );
pulTaskStack = pxMpuSettings->xSystemCallStackInfo.pulTaskStack;
if( ( ulLR & portEXC_RETURN_STACK_FRAME_TYPE_MASK ) == 0UL )
{
/* Extended frame i.e. FPU in use. */
ulStackFrameSize = 26;
__asm volatile (
" vpush {s0} \n" /* Trigger lazy stacking. */
" vpop {s0} \n" /* Nullify the affect of the above instruction. */
::: "memory"
);
}
else
{
/* Standard frame i.e. FPU not in use. */
ulStackFrameSize = 8;
}
/* Make space on the task stack for the stack frame. */
pulTaskStack = pulTaskStack - ulStackFrameSize;
/* Copy the stack frame. */
for( i = 0; i < ulStackFrameSize; i++ )
{
pulTaskStack[ i ] = pulSystemCallStack[ i ];
}
/* Use the pulTaskStack in thread mode. */
__asm volatile ( "msr psp, %0" : : "r" ( pulTaskStack ) );
/* Drop the privilege before returning to the thread mode. */
__asm volatile (
" vpush {s0} \n" /* Trigger lazy stacking. */
" vpop {s0} \n" /* Nullify the affect of the above instruction. */
::: "memory"
);
" mrs r1, control \n" /* Obtain current control value. */
" orr r1, #1 \n" /* Set nPRIV bit. */
" msr control, r1 \n" /* Write back new control value. */
::: "r1", "memory"
);
/* Restore the stacked link register to what it was at the time of
* system call entry. */
pulTaskStack[ portOFFSET_TO_LR ] = pxMpuSettings->xSystemCallStackInfo.ulLinkRegisterAtSystemCallEntry;
/* If the hardware used padding to force the stack pointer
* to be double word aligned, set the stacked xPSR bit[9],
* otherwise clear it. */
if( ( pxMpuSettings->ulTaskFlags & portSTACK_FRAME_HAS_PADDING_FLAG ) == portSTACK_FRAME_HAS_PADDING_FLAG )
{
pulTaskStack[ portOFFSET_TO_PSR ] |= portPSR_STACK_PADDING_MASK;
}
else
{
pulTaskStack[ portOFFSET_TO_PSR ] &= ( ~portPSR_STACK_PADDING_MASK );
}
/* This is not NULL only for the duration of the system call. */
pxMpuSettings->xSystemCallStackInfo.pulTaskStack = NULL;
}
else
{
/* Standard frame i.e. FPU not in use. */
ulStackFrameSize = 8;
}
/* Make space on the task stack for the stack frame. */
pulTaskStack = pulTaskStack - ulStackFrameSize;
/* Copy the stack frame. */
for( i = 0; i < ulStackFrameSize; i++ )
{
pulTaskStack[ i ] = pulSystemCallStack[ i ];
}
/* Use the pulTaskStack in thread mode. */
__asm volatile ( "msr psp, %0" : : "r" ( pulTaskStack ) );
/* Drop the privilege before returning to the thread mode. */
__asm volatile (
" mrs r1, control \n" /* Obtain current control value. */
" orr r1, #1 \n" /* Set nPRIV bit. */
" msr control, r1 \n" /* Write back new control value. */
::: "r1", "memory"
);
/* Restore the stacked link register to what it was at the time of
* system call entry. */
pulTaskStack[ portOFFSET_TO_LR ] = pxMpuSettings->xSystemCallStackInfo.ulLinkRegisterAtSystemCallEntry;
/* If the hardware used padding to force the stack pointer
* to be double word aligned, set the stacked xPSR bit[9],
* otherwise clear it. */
if( ( pxMpuSettings->ulTaskFlags & portSTACK_FRAME_HAS_PADDING_FLAG ) == portSTACK_FRAME_HAS_PADDING_FLAG )
{
pulTaskStack[ portOFFSET_TO_PSR ] |= portPSR_STACK_PADDING_MASK;
}
else
{
pulTaskStack[ portOFFSET_TO_PSR ] &= ( ~portPSR_STACK_PADDING_MASK );
}
/* This is not NULL only for the duration of the system call. */
pxMpuSettings->xSystemCallStackInfo.pulTaskStack = NULL;
}
}
#endif /* #if ( configUSE_MPU_WRAPPERS_V1 == 0 ) */
/*-----------------------------------------------------------*/
@ -793,22 +808,22 @@ BaseType_t xPortStartScheduler( void )
if( ulImplementedPrioBits == 8 )
{
/* When the hardware implements 8 priority bits, there is no way for
* the software to configure PRIGROUP to not have sub-priorities. As
* a result, the least significant bit is always used for sub-priority
* and there are 128 preemption priorities and 2 sub-priorities.
*
* This may cause some confusion in some cases - for example, if
* configMAX_SYSCALL_INTERRUPT_PRIORITY is set to 5, both 5 and 4
* priority interrupts will be masked in Critical Sections as those
* are at the same preemption priority. This may appear confusing as
* 4 is higher (numerically lower) priority than
* configMAX_SYSCALL_INTERRUPT_PRIORITY and therefore, should not
* have been masked. Instead, if we set configMAX_SYSCALL_INTERRUPT_PRIORITY
* to 4, this confusion does not happen and the behaviour remains the same.
*
* The following assert ensures that the sub-priority bit in the
* configMAX_SYSCALL_INTERRUPT_PRIORITY is clear to avoid the above mentioned
* confusion. */
* the software to configure PRIGROUP to not have sub-priorities. As
* a result, the least significant bit is always used for sub-priority
* and there are 128 preemption priorities and 2 sub-priorities.
*
* This may cause some confusion in some cases - for example, if
* configMAX_SYSCALL_INTERRUPT_PRIORITY is set to 5, both 5 and 4
* priority interrupts will be masked in Critical Sections as those
* are at the same preemption priority. This may appear confusing as
* 4 is higher (numerically lower) priority than
* configMAX_SYSCALL_INTERRUPT_PRIORITY and therefore, should not
* have been masked. Instead, if we set configMAX_SYSCALL_INTERRUPT_PRIORITY
* to 4, this confusion does not happen and the behaviour remains the same.
*
* The following assert ensures that the sub-priority bit in the
* configMAX_SYSCALL_INTERRUPT_PRIORITY is clear to avoid the above mentioned
* confusion. */
configASSERT( ( configMAX_SYSCALL_INTERRUPT_PRIORITY & 0x1U ) == 0U );
ulMaxPRIGROUPValue = 0;
}
@ -1122,10 +1137,10 @@ void vPortStoreTaskMPUSettings( xMPU_SETTINGS * xMPUSettings,
( prvGetMPURegionSizeSetting( ( uint32_t ) __SRAM_segment_end__ - ( uint32_t ) __SRAM_segment_start__ ) ) |
( portMPU_REGION_ENABLE );
xMPUSettings->xRegionSettings[ 0 ].ulRegionStartAddress = ( uint32_t ) __SRAM_segment_start__;
xMPUSettings->xRegionSettings[ 0 ].ulRegionEndAddress = ( uint32_t ) __SRAM_segment_end__;
xMPUSettings->xRegionSettings[ 0 ].ulRegionPermissions = ( tskMPU_READ_PERMISSION |
tskMPU_WRITE_PERMISSION );
xMPUSettings->xRegionSettings[ 0 ].ulRegionStartAddress = ( uint32_t ) __SRAM_segment_start__;
xMPUSettings->xRegionSettings[ 0 ].ulRegionEndAddress = ( uint32_t ) __SRAM_segment_end__;
xMPUSettings->xRegionSettings[ 0 ].ulRegionPermissions = ( tskMPU_READ_PERMISSION |
tskMPU_WRITE_PERMISSION );
/* Invalidate user configurable regions. */
for( ul = 1UL; ul <= portNUM_CONFIGURABLE_REGIONS; ul++ )
@ -1163,7 +1178,6 @@ void vPortStoreTaskMPUSettings( xMPU_SETTINGS * xMPUSettings,
( ulStackDepth * ( uint32_t ) sizeof( StackType_t ) ) - 1UL );
xMPUSettings->xRegionSettings[ 0 ].ulRegionPermissions = ( tskMPU_READ_PERMISSION |
tskMPU_WRITE_PERMISSION );
}
lIndex = 0;
@ -1185,14 +1199,16 @@ void vPortStoreTaskMPUSettings( xMPU_SETTINGS * xMPUSettings,
( xRegions[ lIndex ].ulParameters ) |
( portMPU_REGION_ENABLE );
xMPUSettings->xRegionSettings[ ul ].ulRegionStartAddress = ( uint32_t) xRegions[ lIndex ].pvBaseAddress;
xMPUSettings->xRegionSettings[ ul ].ulRegionStartAddress = ( uint32_t ) xRegions[ lIndex ].pvBaseAddress;
xMPUSettings->xRegionSettings[ ul ].ulRegionEndAddress = ( uint32_t ) ( ( uint32_t ) xRegions[ lIndex ].pvBaseAddress + xRegions[ lIndex ].ulLengthInBytes - 1UL );
xMPUSettings->xRegionSettings[ ul ].ulRegionPermissions = 0UL;
if( ( ( xRegions[ lIndex ].ulParameters & portMPU_REGION_READ_ONLY ) == portMPU_REGION_READ_ONLY ) ||
( ( xRegions[ lIndex ].ulParameters & portMPU_REGION_PRIVILEGED_READ_WRITE_UNPRIV_READ_ONLY ) == portMPU_REGION_PRIVILEGED_READ_WRITE_UNPRIV_READ_ONLY ) )
{
xMPUSettings->xRegionSettings[ ul ].ulRegionPermissions = tskMPU_READ_PERMISSION;
}
if( ( xRegions[ lIndex ].ulParameters & portMPU_REGION_READ_WRITE ) == portMPU_REGION_READ_WRITE )
{
xMPUSettings->xRegionSettings[ ul ].ulRegionPermissions = ( tskMPU_READ_PERMISSION | tskMPU_WRITE_PERMISSION );

68
portable/IAR/ARM_CM4F_MPU/portmacro.h
View file

@ -65,7 +65,7 @@ typedef unsigned long UBaseType_t;
#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 )
#elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
typedef uint32_t TickType_t;
#define portMAX_DELAY ( TickType_t ) 0xffffffffUL
@ -73,13 +73,13 @@ typedef unsigned long UBaseType_t;
* 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.
#error "configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width."
#endif
/* Errata 837070 workaround must be enabled on Cortex-M7 r0p0
* and r0p1 cores. */
#ifndef configENABLE_ERRATA_837070_WORKAROUND
#define configENABLE_ERRATA_837070_WORKAROUND 0
#define configENABLE_ERRATA_837070_WORKAROUND 0
#endif
/*-----------------------------------------------------------*/
@ -210,7 +210,7 @@ typedef struct MPU_REGION_SETTINGS
#if ( configUSE_MPU_WRAPPERS_V1 == 0 )
#ifndef configSYSTEM_CALL_STACK_SIZE
#error configSYSTEM_CALL_STACK_SIZE must be defined to the desired size of the system call stack in words for using MPU wrappers v2.
#error "configSYSTEM_CALL_STACK_SIZE must be defined to the desired size of the system call stack in words for using MPU wrappers v2."
#endif
typedef struct SYSTEM_CALL_STACK_INFO
@ -223,11 +223,11 @@ typedef struct MPU_REGION_SETTINGS
#endif /* configUSE_MPU_WRAPPERS_V1 == 0 */
#define MAX_CONTEXT_SIZE 52
#define MAX_CONTEXT_SIZE 52
/* Flags used for xMPU_SETTINGS.ulTaskFlags member. */
#define portSTACK_FRAME_HAS_PADDING_FLAG ( 1UL << 0UL )
#define portTASK_IS_PRIVILEGED_FLAG ( 1UL << 1UL )
#define portSTACK_FRAME_HAS_PADDING_FLAG ( 1UL << 0UL )
#define portTASK_IS_PRIVILEGED_FLAG ( 1UL << 1UL )
typedef struct MPU_SETTINGS
{
@ -248,16 +248,16 @@ typedef struct MPU_SETTINGS
/*-----------------------------------------------------------*/
/* SVC numbers for various services. */
#define portSVC_START_SCHEDULER 0
#define portSVC_YIELD 1
#define portSVC_RAISE_PRIVILEGE 2
#define portSVC_SYSTEM_CALL_ENTER 3 /* System calls with upto 4 parameters. */
#define portSVC_SYSTEM_CALL_ENTER_1 4 /* System calls with 5 parameters. */
#define portSVC_SYSTEM_CALL_EXIT 5
#define portSVC_START_SCHEDULER 0
#define portSVC_YIELD 1
#define portSVC_RAISE_PRIVILEGE 2
#define portSVC_SYSTEM_CALL_ENTER 3 /* System calls with upto 4 parameters. */
#define portSVC_SYSTEM_CALL_ENTER_1 4 /* System calls with 5 parameters. */
#define portSVC_SYSTEM_CALL_EXIT 5
/* Scheduler utilities. */
#define portYIELD() __asm volatile ( " SVC %0 \n"::"i" ( portSVC_YIELD ) : "memory" )
#define portYIELD() __asm volatile ( " SVC %0 \n" ::"i" ( portSVC_YIELD ) : "memory" )
#define portYIELD_WITHIN_API() \
{ \
/* Set a PendSV to request a context switch. */ \
@ -268,7 +268,7 @@ typedef struct MPU_SETTINGS
#define portNVIC_INT_CTRL_REG ( *( ( volatile uint32_t * ) 0xe000ed04 ) )
#define portNVIC_PENDSVSET_BIT ( 1UL << 28UL )
#define portEND_SWITCHING_ISR( xSwitchRequired ) do { if( xSwitchRequired != pdFALSE ) portYIELD_WITHIN_API(); } while( 0 )
#define portEND_SWITCHING_ISR( xSwitchRequired ) do { if( xSwitchRequired != pdFALSE ) portYIELD_WITHIN_API( ); } while( 0 )
#define portYIELD_FROM_ISR( x ) portEND_SWITCHING_ISR( x )
/*-----------------------------------------------------------*/
@ -281,7 +281,7 @@ typedef struct MPU_SETTINGS
/* 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.
#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. */
@ -299,23 +299,23 @@ typedef struct MPU_SETTINGS
extern void vPortEnterCritical( void );
extern void vPortExitCritical( void );
#if( configENABLE_ERRATA_837070_WORKAROUND == 1 )
#define portDISABLE_INTERRUPTS() \
{ \
__disable_interrupt(); \
__set_BASEPRI( configMAX_SYSCALL_INTERRUPT_PRIORITY ); \
__DSB(); \
__ISB(); \
__enable_interrupt(); \
}
#if ( configENABLE_ERRATA_837070_WORKAROUND == 1 )
#define portDISABLE_INTERRUPTS() \
{ \
__disable_interrupt(); \
__set_BASEPRI( configMAX_SYSCALL_INTERRUPT_PRIORITY ); \
__DSB(); \
__ISB(); \
__enable_interrupt(); \
}
#else
#define portDISABLE_INTERRUPTS() \
{ \
__set_BASEPRI( configMAX_SYSCALL_INTERRUPT_PRIORITY ); \
__DSB(); \
__ISB(); \
}
#endif
#define portDISABLE_INTERRUPTS() \
{ \
__set_BASEPRI( configMAX_SYSCALL_INTERRUPT_PRIORITY ); \
__DSB(); \
__ISB(); \
}
#endif /* if ( configENABLE_ERRATA_837070_WORKAROUND == 1 ) */
#define portENABLE_INTERRUPTS() __set_BASEPRI( 0 )
#define portENTER_CRITICAL() vPortEnterCritical()
@ -399,11 +399,11 @@ extern BaseType_t xPortIsTaskPrivileged( void );
*
* @return pdTRUE if the calling task is privileged, pdFALSE otherwise.
*/
#define portIS_TASK_PRIVILEGED() xPortIsTaskPrivileged()
#define portIS_TASK_PRIVILEGED() xPortIsTaskPrivileged()
/*-----------------------------------------------------------*/
#ifndef configENFORCE_SYSTEM_CALLS_FROM_KERNEL_ONLY
#warning "configENFORCE_SYSTEM_CALLS_FROM_KERNEL_ONLY is not defined. We recommend defining it to 1 in FreeRTOSConfig.h for better security. https://www.FreeRTOS.org/FreeRTOS-V10.3.x.html"
#warning "configENFORCE_SYSTEM_CALLS_FROM_KERNEL_ONLY is not defined. We recommend defining it to 1 in FreeRTOSConfig.h for better security. www.FreeRTOS.org/FreeRTOS-V10.3.x.html"
#define configENFORCE_SYSTEM_CALLS_FROM_KERNEL_ONLY 0
#endif
/*-----------------------------------------------------------*/