Add new port layer for Cortex-A devices without the means to mask interrupt priorities.
This commit is contained in:
Richard Barry
321
FreeRTOS/Source/portable/IAR/ARM_CAx_No_GIC/port.c
Normal file
321
FreeRTOS/Source/portable/IAR/ARM_CAx_No_GIC/port.c
Normal file
File diff suppressed because it is too large
Load Diff
145
FreeRTOS/Source/portable/IAR/ARM_CAx_No_GIC/portASM.h
Normal file
145
FreeRTOS/Source/portable/IAR/ARM_CAx_No_GIC/portASM.h
Normal file
@ -0,0 +1,145 @@
|
||||
;/*
|
||||
; FreeRTOS V8.0.1 - 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
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EXTERN ulCriticalNesting
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EXTERN pxCurrentTCB
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EXTERN ulPortTaskHasFPUContext
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EXTERN ulAsmAPIPriorityMask
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portSAVE_CONTEXT macro
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; Save the LR and SPSR onto the system mode stack before switching to
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; system mode to save the remaining system mode registers
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SRSDB sp!, #SYS_MODE
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CPS #SYS_MODE
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PUSH {R0-R12, R14}
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; Push the critical nesting count
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LDR R2, =ulCriticalNesting
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LDR R1, [R2]
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PUSH {R1}
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; Does the task have a floating point context that needs saving? If
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; ulPortTaskHasFPUContext is 0 then no.
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LDR R2, =ulPortTaskHasFPUContext
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LDR R3, [R2]
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CMP R3, #0
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; Save the floating point context, if any
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FMRXNE R1, FPSCR
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VPUSHNE {D0-D15}
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VPUSHNE {D16-D31}
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PUSHNE {R1}
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; Save ulPortTaskHasFPUContext itself
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PUSH {R3}
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; Save the stack pointer in the TCB
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LDR R0, =pxCurrentTCB
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LDR R1, [R0]
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STR SP, [R1]
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||||
endm
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||||
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; /**********************************************************************/
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portRESTORE_CONTEXT macro
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; Switch to system mode
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CPS #SYS_MODE
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; Set the SP to point to the stack of the task being restored.
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LDR R0, =pxCurrentTCB
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LDR R1, [R0]
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LDR SP, [R1]
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; Is there a floating point context to restore? If the restored
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; ulPortTaskHasFPUContext is zero then no.
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LDR R0, =ulPortTaskHasFPUContext
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POP {R1}
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STR R1, [R0]
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CMP R1, #0
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; Restore the floating point context, if any
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POPNE {R0}
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VPOPNE {D16-D31}
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VPOPNE {D0-D15}
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VMSRNE FPSCR, R0
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; Restore the critical section nesting depth
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LDR R0, =ulCriticalNesting
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POP {R1}
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STR R1, [R0]
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; Ensure the priority mask is correct for the critical nesting depth
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;_RB_ LDR R2, =portICCPMR_PRIORITY_MASK_REGISTER_ADDRESS
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CMP R1, #0
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MOVEQ R4, #255
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;_RB_ LDRNE R4, =( configMAX_API_CALL_INTERRUPT_PRIORITY << portPRIORITY_SHIFT )
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STR R4, [r2]
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; Restore all system mode registers other than the SP (which is already
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; being used)
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POP {R0-R12, R14}
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; Return to the task code, loading CPSR on the way.
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RFEIA sp!
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||||
endm
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||||
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||||
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||||
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||||
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||||
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||||
198
FreeRTOS/Source/portable/IAR/ARM_CAx_No_GIC/portASM.s
Normal file
198
FreeRTOS/Source/portable/IAR/ARM_CAx_No_GIC/portASM.s
Normal file
@ -0,0 +1,198 @@
|
||||
;/*
|
||||
; FreeRTOS V8.0.1 - 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.
|
||||
;*/
|
||||
|
||||
INCLUDE FreeRTOSConfig.h
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||||
INCLUDE portmacro.h
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||||
|
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EXTERN vTaskSwitchContext
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EXTERN ulPortYieldRequired
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EXTERN ulPortInterruptNesting
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PUBLIC FreeRTOS_SWI_Handler
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PUBLIC FreeRTOS_IRQ_Handler
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PUBLIC vPortRestoreTaskContext
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SYS_MODE EQU 0x1f
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SVC_MODE EQU 0x13
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IRQ_MODE EQU 0x12
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; AIC register definitions.
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AIC_IVR EQU 0xFFFFF010UL
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AIC_EOICR EQU 0xFFFFF038UL
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||||
SECTION .text:CODE:ROOT(2)
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ARM
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||||
|
||||
INCLUDE portASM.h
|
||||
|
||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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||||
; SVC handler is used to start the scheduler and yield a task.
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||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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||||
FreeRTOS_SWI_Handler
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||||
|
||||
PRESERVE8
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||||
|
||||
; Save the context of the current task and select a new task to run.
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||||
portSAVE_CONTEXT
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||||
LDR R0, =vTaskSwitchContext
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BLX R0
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||||
vPortRestoreTaskContext
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portRESTORE_CONTEXT
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||||
|
||||
|
||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||
; AIC interrupt handler
|
||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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||||
FreeRTOS_IRQ_Handler
|
||||
|
||||
; Return to the interrupted instruction.
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||||
SUB lr, lr, #4
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||||
|
||||
; Push the return address and SPSR
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PUSH {lr}
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||||
MRS lr, SPSR
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||||
PUSH {lr}
|
||||
|
||||
; Change to supervisor mode to allow reentry.
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||||
CPS #SVC_MODE
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||||
|
||||
; Push used registers.
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||||
PUSH {r0-r4, r12}
|
||||
|
||||
; Increment nesting count. r3 holds the address of ulPortInterruptNesting
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||||
; for future use. r1 holds the original ulPortInterruptNesting value for
|
||||
; future use.
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||||
LDR r3, =ulPortInterruptNesting
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||||
LDR r1, [r3]
|
||||
ADD r4, r1, #1
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||||
STR r4, [r3]
|
||||
|
||||
; 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}
|
||||
LDR r1, =AIC_IVR
|
||||
LDR r0, [r1]
|
||||
STR r1, [r1] ; Write to IVR in case protect mode is being used.
|
||||
BLX r0
|
||||
POP {r0-r3, lr}
|
||||
ADD sp, sp, r2
|
||||
|
||||
CPSID i
|
||||
|
||||
; Write to the EOI register
|
||||
LDR r4, =AIC_EOICR
|
||||
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 switch 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.
|
||||
LDR r0, =vTaskSwitchContext
|
||||
BLX r0
|
||||
|
||||
; Restore the context of, and branch to, the task selected to execute next.
|
||||
portRESTORE_CONTEXT
|
||||
|
||||
|
||||
END
|
||||
|
||||
|
||||
|
||||
|
||||
192
FreeRTOS/Source/portable/IAR/ARM_CAx_No_GIC/portmacro.h
Normal file
192
FreeRTOS/Source/portable/IAR/ARM_CAx_No_GIC/portmacro.h
Normal file
@ -0,0 +1,192 @@
|
||||
/*
|
||||
FreeRTOS V8.0.1 - Copyright (C) 2014 Real Time Engineers Ltd.
|
||||
All rights reserved
|
||||
|
||||
VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
|
||||
|
||||
***************************************************************************
|
||||
* *
|
||||
* FreeRTOS provides completely free yet professionally developed, *
|
||||
* robust, strictly quality controlled, supported, and cross *
|
||||
* platform software that has become a de facto standard. *
|
||||
* *
|
||||
* Help yourself get started quickly and support the FreeRTOS *
|
||||
* project by purchasing a FreeRTOS tutorial book, reference *
|
||||
* manual, or both from: http://www.FreeRTOS.org/Documentation *
|
||||
* *
|
||||
* Thank you! *
|
||||
* *
|
||||
***************************************************************************
|
||||
|
||||
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. Full license text is available from the following
|
||||
link: http://www.freertos.org/a00114.html
|
||||
|
||||
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, a DOS
|
||||
compatible FAT file system, and our tiny thread aware UDP/IP stack.
|
||||
|
||||
http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
|
||||
Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
|
||||
licenses offer ticketed support, indemnification and middleware.
|
||||
|
||||
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.
|
||||
|
||||
1 tab == 4 spaces!
|
||||
*/
|
||||
|
||||
#ifndef PORTMACRO_H
|
||||
#define PORTMACRO_H
|
||||
|
||||
/* IAR includes. */
|
||||
#ifdef __ICCARM__
|
||||
|
||||
#include <intrinsics.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 uint32_t
|
||||
#define portBASE_TYPE long
|
||||
|
||||
typedef portSTACK_TYPE StackType_t;
|
||||
typedef long BaseType_t;
|
||||
typedef unsigned long UBaseType_t;
|
||||
|
||||
typedef uint32_t TickType_t;
|
||||
#define portMAX_DELAY ( TickType_t ) 0xffffffffUL
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* Hardware specifics. */
|
||||
#define portSTACK_GROWTH ( -1 )
|
||||
#define portTICK_PERIOD_MS ( ( TickType_t ) 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 uint32_t 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 uint32_t ulPortSetInterruptMask( void );
|
||||
extern void vPortClearInterruptMask( uint32_t ulNewMaskValue );
|
||||
|
||||
#define portENTER_CRITICAL() vPortEnterCritical();
|
||||
#define portEXIT_CRITICAL() vPortExitCritical();
|
||||
#define portDISABLE_INTERRUPTS() __disable_irq() /* No priority mask register so global disable is used. */
|
||||
#define portENABLE_INTERRUPTS() __enable_irq()
|
||||
#define portSET_INTERRUPT_MASK_FROM_ISR() __get_interrupt_state()
|
||||
#define portCLEAR_INTERRUPT_MASK_FROM_ISR(x) __set_interrupt_state(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()
|
||||
|
||||
/* 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() __asm volatile( "NOP" )
|
||||
|
||||
|
||||
#ifdef __cplusplus
|
||||
} /* extern C */
|
||||
#endif
|
||||
|
||||
/* Suppress warnings that are generated by the IAR tools, but cannot be
|
||||
fixed in the source code because to do so would cause other compilers to
|
||||
generate warnings. */
|
||||
#pragma diag_suppress=Pe191
|
||||
#pragma diag_suppress=Pa082
|
||||
|
||||
#endif /* __ICCARM__ */
|
||||
|
||||
#endif /* PORTMACRO_H */
|
||||
|
||||
Reference in New Issue
Block a user