Carry on working on the Cortex-A/GCC port layer - still a work in progress.
Richard Barry
11 years ago
parent
33351b02c9
commit
3e430b3801
@ -1,145 +0,0 @@
|
||||
;/*
|
||||
; FreeRTOS V8.0.0:rc1 - Copyright (C) 2014 Real Time Engineers Ltd.
|
||||
; All rights reserved
|
||||
;
|
||||
;
|
||||
; ***************************************************************************
|
||||
; * *
|
||||
; * 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.
|
||||
;*/
|
||||
|
||||
EXTERN vTaskSwitchContext
|
||||
EXTERN ulCriticalNesting
|
||||
EXTERN pxCurrentTCB
|
||||
EXTERN ulPortTaskHasFPUContext
|
||||
EXTERN ulAsmAPIPriorityMask
|
||||
|
||||
portSAVE_CONTEXT macro
|
||||
|
||||
; 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]
|
||||
|
||||
endm
|
||||
|
||||
; /**********************************************************************/
|
||||
|
||||
portRESTORE_CONTEXT macro
|
||||
|
||||
; 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, =portICCPMR_PRIORITY_MASK_REGISTER_ADDRESS
|
||||
CMP R1, #0
|
||||
MOVEQ R4, #255
|
||||
LDRNE R4, =( configMAX_API_CALL_INTERRUPT_PRIORITY << portPRIORITY_SHIFT )
|
||||
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!
|
||||
|
||||
endm
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
Loading…
Reference in New Issue