RVDS ARM Cortex-A port layer.
This commit is contained in:
Richard Barry
434
FreeRTOS/Source/portable/RVDS/ARM_CA9/port.c
Normal file
434
FreeRTOS/Source/portable/RVDS/ARM_CA9/port.c
Normal file
File diff suppressed because it is too large
Load Diff
190
FreeRTOS/Source/portable/RVDS/ARM_CA9/portASM.s
Normal file
190
FreeRTOS/Source/portable/RVDS/ARM_CA9/portASM.s
Normal file
@ -0,0 +1,190 @@
|
||||
;/*
|
||||
; FreeRTOS V7.4.2 - Copyright (C) 2013 Real Time Engineers Ltd.
|
||||
;
|
||||
;
|
||||
; ***************************************************************************
|
||||
; * *
|
||||
; * FreeRTOS tutorial books are available in pdf and paperback. *
|
||||
; * Complete, revised, and edited pdf reference manuals are also *
|
||||
; * available. *
|
||||
; * *
|
||||
; * Purchasing FreeRTOS documentation will not only help you, by *
|
||||
; * ensuring you get running as quickly as possible and with an *
|
||||
; * in-depth knowledge of how to use FreeRTOS, it will also help *
|
||||
; * the FreeRTOS project to continue with its mission of providing *
|
||||
; * professional grade, cross platform, de facto standard solutions *
|
||||
; * for microcontrollers - completely free of charge! *
|
||||
; * *
|
||||
; * >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
|
||||
; * *
|
||||
; * Thank you for using FreeRTOS, and 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 modification to the GPL is included to allow you to
|
||||
; distribute a combined work that includes FreeRTOS without being obliged to
|
||||
; provide the source code for proprietary components outside of the FreeRTOS
|
||||
; kernel. FreeRTOS is distributed in the hope that it will be useful, but
|
||||
; WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
||||
; or FITNESS FOR A PARTICULAR PURPOSE. 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.
|
||||
;*/
|
||||
|
||||
INCLUDE portmacro.inc
|
||||
|
||||
IMPORT vApplicationIRQHandler
|
||||
IMPORT vTaskSwitchContext
|
||||
IMPORT ulPortYieldRequired
|
||||
IMPORT ulPortInterruptNesting
|
||||
IMPORT vTaskSwitchContext
|
||||
IMPORT ulICCIAR
|
||||
IMPORT ulICCEOIR
|
||||
|
||||
EXPORT FreeRTOS_SWI_Handler
|
||||
EXPORT FreeRTOS_IRQ_Handler
|
||||
EXPORT vPortRestoreTaskContext
|
||||
|
||||
ARM
|
||||
AREA PORT_ASM, CODE, READONLY
|
||||
|
||||
|
||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||
; SVC handler is used to start the scheduler and yield a task.
|
||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||
FreeRTOS_SWI_Handler
|
||||
|
||||
PRESERVE8
|
||||
|
||||
; Save the context of the current task and select a new task to run.
|
||||
portSAVE_CONTEXT
|
||||
LDR R0, =vTaskSwitchContext
|
||||
BLX R0
|
||||
|
||||
vPortRestoreTaskContext
|
||||
portRESTORE_CONTEXT
|
||||
|
||||
|
||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||
; PL390 GIC interrupt handler
|
||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||
FreeRTOS_IRQ_Handler
|
||||
|
||||
; Return to the interrupted instruction.
|
||||
SUB lr, lr, #4
|
||||
|
||||
; Push the return address and SPSR
|
||||
PUSH {lr}
|
||||
MRS lr, SPSR
|
||||
PUSH {lr}
|
||||
|
||||
; Change to supervisor mode to allow reentry.
|
||||
CPS #SVC_MODE
|
||||
|
||||
; Push used registers.
|
||||
PUSH {r0-r4, r12}
|
||||
|
||||
; Increment nesting count. r3 holds the address of ulPortInterruptNesting
|
||||
; for future use. r1 holds the original ulPortInterruptNesting value for
|
||||
; future use.
|
||||
LDR r3, =ulPortInterruptNesting
|
||||
LDR r1, [r3]
|
||||
ADD r4, r1, #1
|
||||
STR r4, [r3]
|
||||
|
||||
; Read value from the interrupt acknowledge register, which is stored in r0
|
||||
; for future parameter and interrupt clearing use.
|
||||
LDR r2, =ulICCIAR
|
||||
LDR r0, [r2]
|
||||
|
||||
; Ensure bit 2 of the stack pointer is clear. r2 holds the bit 2 value for
|
||||
; future use.
|
||||
MOV r2, sp
|
||||
AND r2, r2, #4
|
||||
SUB sp, sp, r2
|
||||
|
||||
; Call the interrupt handler
|
||||
PUSH {r0-r3, lr}
|
||||
BL vApplicationIRQHandler
|
||||
POP {r0-r3, lr}
|
||||
ADD sp, sp, r2
|
||||
|
||||
; Write the value read from ICCIAR to ICCEOIR
|
||||
LDR r4, =ulICCEOIR
|
||||
STR r0, [r4]
|
||||
|
||||
; Restore the old nesting count
|
||||
STR r1, [r3]
|
||||
|
||||
; A context switch is never performed if the nesting count is not 0
|
||||
CMP r1, #0
|
||||
BNE exit_without_switch
|
||||
|
||||
; Did the interrupt request a context switch? r1 holds the address of
|
||||
; ulPortYieldRequired and r0 the value of ulPortYieldRequired for future
|
||||
; use.
|
||||
LDR r1, =ulPortYieldRequired
|
||||
LDR r0, [r1]
|
||||
CMP r0, #0
|
||||
BNE switch_before_exit
|
||||
|
||||
exit_without_switch
|
||||
; No context switch. Restore used registers, LR_irq and SPSR before
|
||||
; returning.
|
||||
POP {r0-r4, r12}
|
||||
CPS #IRQ_MODE
|
||||
POP {LR}
|
||||
MSR SPSR_cxsf, LR
|
||||
POP {LR}
|
||||
MOVS PC, LR
|
||||
|
||||
switch_before_exit
|
||||
; A context swtich is to be performed. Clear the context switch pending
|
||||
; flag.
|
||||
MOV r0, #0
|
||||
STR r0, [r1]
|
||||
|
||||
; Restore used registers, LR-irq and SPSR before saving the context
|
||||
; to the task stack.
|
||||
POP {r0-r4, r12}
|
||||
CPS #IRQ_MODE
|
||||
POP {LR}
|
||||
MSR SPSR_cxsf, LR
|
||||
POP {LR}
|
||||
portSAVE_CONTEXT
|
||||
|
||||
; Call the function that selects the new task to execute.
|
||||
; vTaskSwitchContext() if vTaskSwitchContext() uses LDRD or STRD
|
||||
; instructions, or 8 byte aligned stack allocated data. LR does not need
|
||||
; saving as a new LR will be loaded by portRESTORE_CONTEXT anyway.
|
||||
BL vTaskSwitchContext
|
||||
|
||||
; Restore the context of, and branch to, the task selected to execute next.
|
||||
portRESTORE_CONTEXT
|
||||
|
||||
|
||||
END
|
||||
|
||||
|
||||
|
||||
|
||||
192
FreeRTOS/Source/portable/RVDS/ARM_CA9/portmacro.h
Normal file
192
FreeRTOS/Source/portable/RVDS/ARM_CA9/portmacro.h
Normal file
@ -0,0 +1,192 @@
|
||||
/*
|
||||
FreeRTOS V7.4.2 - Copyright (C) 2013 Real Time Engineers Ltd.
|
||||
|
||||
FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME. PLEASE VISIT
|
||||
http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
|
||||
|
||||
***************************************************************************
|
||||
* *
|
||||
* FreeRTOS tutorial books are available in pdf and paperback. *
|
||||
* Complete, revised, and edited pdf reference manuals are also *
|
||||
* available. *
|
||||
* *
|
||||
* Purchasing FreeRTOS documentation will not only help you, by *
|
||||
* ensuring you get running as quickly as possible and with an *
|
||||
* in-depth knowledge of how to use FreeRTOS, it will also help *
|
||||
* the FreeRTOS project to continue with its mission of providing *
|
||||
* professional grade, cross platform, de facto standard solutions *
|
||||
* for microcontrollers - completely free of charge! *
|
||||
* *
|
||||
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
|
||||
* *
|
||||
* Thank you for using FreeRTOS, and 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 modification to the GPL is included to allow you to
|
||||
distribute a combined work that includes FreeRTOS without being obliged to
|
||||
provide the source code for proprietary components outside of the FreeRTOS
|
||||
kernel.
|
||||
|
||||
FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
|
||||
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
||||
FOR A PARTICULAR PURPOSE. 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 Real Time Engineers Ltd., contact details for whom are available
|
||||
on the FreeRTOS WEB site.
|
||||
|
||||
1 tab == 4 spaces!
|
||||
|
||||
***************************************************************************
|
||||
* *
|
||||
* Having a problem? Start by reading the FAQ "My application does *
|
||||
* not run, what could be wrong?" *
|
||||
* *
|
||||
* http://www.FreeRTOS.org/FAQHelp.html *
|
||||
* *
|
||||
***************************************************************************
|
||||
|
||||
|
||||
http://www.FreeRTOS.org - Documentation, books, training, latest versions,
|
||||
license and Real Time Engineers Ltd. contact details.
|
||||
|
||||
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
|
||||
including FreeRTOS+Trace - an indispensable productivity tool, and our new
|
||||
fully thread aware and reentrant UDP/IP stack.
|
||||
|
||||
http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
|
||||
Integrity Systems, who sell the code with commercial support,
|
||||
indemnification and middleware, under the OpenRTOS brand.
|
||||
|
||||
http://www.SafeRTOS.com - High Integrity Systems also provide a safety
|
||||
engineered and independently SIL3 certified version for use in safety and
|
||||
mission critical applications that require provable dependability.
|
||||
*/
|
||||
|
||||
#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. */
|
||||
#define portCHAR char
|
||||
#define portFLOAT float
|
||||
#define portDOUBLE double
|
||||
#define portLONG long
|
||||
#define portSHORT short
|
||||
#define portSTACK_TYPE unsigned long
|
||||
#define portBASE_TYPE portLONG
|
||||
|
||||
#if( configUSE_16_BIT_TICKS == 1 )
|
||||
typedef unsigned short portTickType;
|
||||
#define portMAX_DELAY ( portTickType ) 0xffff
|
||||
#else
|
||||
typedef unsigned long portTickType;
|
||||
#define portMAX_DELAY ( portTickType ) 0xffffffff
|
||||
#endif
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* Hardware specifics. */
|
||||
#define portSTACK_GROWTH ( -1 )
|
||||
#define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ )
|
||||
#define portBYTE_ALIGNMENT 8
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* Task utilities. */
|
||||
|
||||
/* Called at the end of an ISR that can cause a context switch. */
|
||||
#define portEND_SWITCHING_ISR( xSwitchRequired )\
|
||||
{ \
|
||||
extern unsigned long ulPortYieldRequired; \
|
||||
\
|
||||
if( xSwitchRequired != pdFALSE ) \
|
||||
{ \
|
||||
ulPortYieldRequired = pdTRUE; \
|
||||
} \
|
||||
}
|
||||
|
||||
#define portYIELD_FROM_ISR( x ) portEND_SWITCHING_ISR( x )
|
||||
#define portYIELD() __asm( "SWI 0" );
|
||||
|
||||
|
||||
/*-----------------------------------------------------------
|
||||
* Critical section control
|
||||
*----------------------------------------------------------*/
|
||||
|
||||
extern void vPortEnterCritical( void );
|
||||
extern void vPortExitCritical( void );
|
||||
extern unsigned long ulPortSetInterruptMask( void );
|
||||
extern void vPortClearInterruptMask( unsigned long ulNewMaskValue );
|
||||
|
||||
/* These macros do not globally disable/enable interrupts. They do mask off
|
||||
interrupts that have a priority below configMAX_API_CALL_INTERRUPT_PRIORITY. */
|
||||
#define portENTER_CRITICAL() vPortEnterCritical();
|
||||
#define portEXIT_CRITICAL() vPortExitCritical();
|
||||
#define portDISABLE_INTERRUPTS() ulPortSetInterruptMask()
|
||||
#define portENABLE_INTERRUPTS() vPortClearInterruptMask( 0 )
|
||||
#define portSET_INTERRUPT_MASK_FROM_ISR() ulPortSetInterruptMask()
|
||||
#define portCLEAR_INTERRUPT_MASK_FROM_ISR(x) vPortClearInterruptMask(x)
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* Task function macros as described on the FreeRTOS.org WEB site. These are
|
||||
not required for this port but included in case common demo code that uses these
|
||||
macros is used. */
|
||||
#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
|
||||
#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
|
||||
|
||||
/* Prototype of the FreeRTOS tick handler. This must be installed as the
|
||||
handler for whichever peripheral is used to generate the RTOS tick. */
|
||||
void FreeRTOS_Tick_Handler( void );
|
||||
|
||||
/* Any task that uses the floating point unit MUST call vPortTaskUsesFPU()
|
||||
before any floating point instructions are executed. */
|
||||
void vPortTaskUsesFPU( void );
|
||||
#define portTASK_USES_FLOATING_POINT() vPortTaskUsesFPU()
|
||||
|
||||
#define portLOWEST_INTERRUPT_PRIORITY ( ( ( unsigned long ) configUNIQUE_INTERRUPT_PRIORITIES ) - 1UL )
|
||||
#define portLOWEST_USABLE_INTERRUPT_PRIORITY ( portLOWEST_INTERRUPT_PRIORITY - 1UL )
|
||||
|
||||
/* Architecture specific optimisations. */
|
||||
#if configUSE_PORT_OPTIMISED_TASK_SELECTION == 1
|
||||
|
||||
/* Store/clear the ready priorities in a bit map. */
|
||||
#define portRECORD_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) |= ( 1UL << ( uxPriority ) )
|
||||
#define portRESET_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) &= ~( 1UL << ( uxPriority ) )
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
#define portGET_HIGHEST_PRIORITY( uxTopPriority, uxReadyPriorities ) uxTopPriority = ( 31 - __clz( uxReadyPriorities ) )
|
||||
|
||||
#endif /* configUSE_PORT_OPTIMISED_TASK_SELECTION */
|
||||
|
||||
#define portNOP() __nop()
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* PORTMACRO_H */
|
||||
|
||||
149
FreeRTOS/Source/portable/RVDS/ARM_CA9/portmacro.inc
Normal file
149
FreeRTOS/Source/portable/RVDS/ARM_CA9/portmacro.inc
Normal file
@ -0,0 +1,149 @@
|
||||
;/*
|
||||
; FreeRTOS V7.4.2 - Copyright (C) 2013 Real Time Engineers Ltd.
|
||||
;
|
||||
;
|
||||
; ***************************************************************************
|
||||
; * *
|
||||
; * FreeRTOS tutorial books are available in pdf and paperback. *
|
||||
; * Complete, revised, and edited pdf reference manuals are also *
|
||||
; * available. *
|
||||
; * *
|
||||
; * Purchasing FreeRTOS documentation will not only help you, by *
|
||||
; * ensuring you get running as quickly as possible and with an *
|
||||
; * in-depth knowledge of how to use FreeRTOS, it will also help *
|
||||
; * the FreeRTOS project to continue with its mission of providing *
|
||||
; * professional grade, cross platform, de facto standard solutions *
|
||||
; * for microcontrollers - completely free of charge! *
|
||||
; * *
|
||||
; * >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
|
||||
; * *
|
||||
; * Thank you for using FreeRTOS, and 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 modification to the GPL is included to allow you to
|
||||
; distribute a combined work that includes FreeRTOS without being obliged to
|
||||
; provide the source code for proprietary components outside of the FreeRTOS
|
||||
; kernel. FreeRTOS is distributed in the hope that it will be useful, but
|
||||
; WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
||||
; or FITNESS FOR A PARTICULAR PURPOSE. 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.
|
||||
;*/
|
||||
|
||||
SYS_MODE EQU 0x1f
|
||||
SVC_MODE EQU 0x13
|
||||
IRQ_MODE EQU 0x12
|
||||
|
||||
IMPORT ulCriticalNesting
|
||||
IMPORT pxCurrentTCB
|
||||
IMPORT ulPortTaskHasFPUContext
|
||||
IMPORT ulAsmAPIPriorityMask
|
||||
IMPORT ulICCPMR
|
||||
|
||||
|
||||
MACRO
|
||||
portSAVE_CONTEXT
|
||||
|
||||
; Save the LR and SPSR onto the system mode stack before switching to
|
||||
; system mode to save the remaining system mode registers
|
||||
SRSDB sp!, #SYS_MODE
|
||||
CPS #SYS_MODE
|
||||
PUSH {R0-R12, R14}
|
||||
|
||||
; Push the critical nesting count
|
||||
LDR R2, =ulCriticalNesting
|
||||
LDR R1, [R2]
|
||||
PUSH {R1}
|
||||
|
||||
; Does the task have a floating point context that needs saving? If
|
||||
; ulPortTaskHasFPUContext is 0 then no.
|
||||
LDR R2, =ulPortTaskHasFPUContext
|
||||
LDR R3, [R2]
|
||||
CMP R3, #0
|
||||
|
||||
; Save the floating point context, if any
|
||||
FMRXNE R1, FPSCR
|
||||
VPUSHNE {D0-D15}
|
||||
VPUSHNE {D16-D31}
|
||||
PUSHNE {R1}
|
||||
|
||||
; Save ulPortTaskHasFPUContext itself
|
||||
PUSH {R3}
|
||||
|
||||
; Save the stack pointer in the TCB
|
||||
LDR R0, =pxCurrentTCB
|
||||
LDR R1, [R0]
|
||||
STR SP, [R1]
|
||||
|
||||
MEND
|
||||
|
||||
; /**********************************************************************/
|
||||
|
||||
MACRO
|
||||
portRESTORE_CONTEXT
|
||||
|
||||
; Switch to system mode
|
||||
CPS #SYS_MODE
|
||||
|
||||
; Set the SP to point to the stack of the task being restored.
|
||||
LDR R0, =pxCurrentTCB
|
||||
LDR R1, [R0]
|
||||
LDR SP, [R1]
|
||||
|
||||
; Is there a floating point context to restore? If the restored
|
||||
; ulPortTaskHasFPUContext is zero then no.
|
||||
LDR R0, =ulPortTaskHasFPUContext
|
||||
POP {R1}
|
||||
STR R1, [R0]
|
||||
CMP R1, #0
|
||||
|
||||
; Restore the floating point context, if any
|
||||
LDMFDNE SP!, {R0}
|
||||
VPOPNE {D16-D31}
|
||||
VPOPNE {D0-D15}
|
||||
VMSRNE FPSCR, R0
|
||||
|
||||
; Restore the critical section nesting depth
|
||||
LDR R0, =ulCriticalNesting
|
||||
POP {R1}
|
||||
STR R1, [R0]
|
||||
|
||||
; Ensure the priority mask is correct for the critical nesting depth
|
||||
LDR R2, =ulICCPMR
|
||||
CMP R1, #0
|
||||
MOVEQ R4, #255
|
||||
LDRNE R4, =ulAsmAPIPriorityMask
|
||||
STR R4, [r2]
|
||||
|
||||
; Restore all system mode registers other than the SP (which is already
|
||||
; being used)
|
||||
POP {R0-R12, R14}
|
||||
|
||||
; Return to the task code, loading CPSR on the way.
|
||||
RFEIA sp!
|
||||
|
||||
MEND
|
||||
|
||||
END
|
||||
|
||||
Reference in New Issue
Block a user