Update license text for ports that were previously missed.
Paul Bartell
4 years ago
committed by
Paul Bartell
parent
e31dccae80
commit
b286f173e8
@ -1,78 +1,103 @@
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EXTERN pxCurrentTCB
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;/*
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EXTERN ulCriticalNesting
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; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
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; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; *
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; Context save and restore macro definitions
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; * Permission is hereby granted, free of charge, to any person obtaining a copy of
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; * this software and associated documentation files (the "Software"), to deal in
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; * the Software without restriction, including without limitation the rights to
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portSAVE_CONTEXT MACRO
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; * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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; * the Software, and to permit persons to whom the Software is furnished to do so,
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; Push R0 as we are going to use the register.
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; * subject to the following conditions:
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STMDB SP!, {R0}
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; *
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; * The above copyright notice and this permission notice shall be included in all
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; Set R0 to point to the task stack pointer.
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; * copies or substantial portions of the Software.
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STMDB SP, {SP}^
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; *
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NOP
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; * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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SUB SP, SP, #4
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; * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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LDMIA SP!, {R0}
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; * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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; * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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; Push the return address onto the stack.
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; * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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STMDB R0!, {LR}
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; * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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; *
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; Now we have saved LR we can use it instead of R0.
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; * https://www.FreeRTOS.org
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MOV LR, R0
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; * https://github.com/FreeRTOS
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; *
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; Pop R0 so we can save it onto the system mode stack.
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; */
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LDMIA SP!, {R0}
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EXTERN pxCurrentTCB
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EXTERN ulCriticalNesting
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; Push all the system mode registers onto the task stack.
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STMDB LR, {R0-LR}^
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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NOP
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; Context save and restore macro definitions
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SUB LR, LR, #60
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; Push the SPSR onto the task stack.
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portSAVE_CONTEXT MACRO
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MRS R0, SPSR
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STMDB LR!, {R0}
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; Push R0 as we are going to use the register.
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STMDB SP!, {R0}
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LDR R0, =ulCriticalNesting
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LDR R0, [R0]
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; Set R0 to point to the task stack pointer.
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STMDB LR!, {R0}
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STMDB SP, {SP}^
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NOP
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; Store the new top of stack for the task.
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SUB SP, SP, #4
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LDR R1, =pxCurrentTCB
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LDMIA SP!, {R0}
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LDR R0, [R1]
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STR LR, [R0]
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; Push the return address onto the stack.
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STMDB R0!, {LR}
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ENDM
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; Now we have saved LR we can use it instead of R0.
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MOV LR, R0
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portRESTORE_CONTEXT MACRO
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; Pop R0 so we can save it onto the system mode stack.
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; Set the LR to the task stack.
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LDMIA SP!, {R0}
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LDR R1, =pxCurrentTCB
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LDR R0, [R1]
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; Push all the system mode registers onto the task stack.
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LDR LR, [R0]
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STMDB LR, {R0-LR}^
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NOP
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; The critical nesting depth is the first item on the stack.
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SUB LR, LR, #60
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; Load it into the ulCriticalNesting variable.
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LDR R0, =ulCriticalNesting
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; Push the SPSR onto the task stack.
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LDMFD LR!, {R1}
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MRS R0, SPSR
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STR R1, [R0]
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STMDB LR!, {R0}
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; Get the SPSR from the stack.
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LDR R0, =ulCriticalNesting
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LDMFD LR!, {R0}
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LDR R0, [R0]
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MSR SPSR_cxsf, R0
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STMDB LR!, {R0}
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; Restore all system mode registers for the task.
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; Store the new top of stack for the task.
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LDMFD LR, {R0-R14}^
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LDR R1, =pxCurrentTCB
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NOP
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LDR R0, [R1]
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STR LR, [R0]
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; Restore the return address.
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LDR LR, [LR, #+60]
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ENDM
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; And return - correcting the offset in the LR to obtain the
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; correct address.
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portRESTORE_CONTEXT MACRO
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SUBS PC, LR, #4
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; Set the LR to the task stack.
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ENDM
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LDR R1, =pxCurrentTCB
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LDR R0, [R1]
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LDR LR, [R0]
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; The critical nesting depth is the first item on the stack.
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; Load it into the ulCriticalNesting variable.
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LDR R0, =ulCriticalNesting
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LDMFD LR!, {R1}
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STR R1, [R0]
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; Get the SPSR from the stack.
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LDMFD LR!, {R0}
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MSR SPSR_cxsf, R0
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; Restore all system mode registers for the task.
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LDMFD LR, {R0-R14}^
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NOP
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; Restore the return address.
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LDR LR, [LR, #+60]
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; And return - correcting the offset in the LR to obtain the
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; correct address.
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SUBS PC, LR, #4
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ENDM
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@ -1,34 +1,59 @@
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RSEG ICODE:CODE
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;/*
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CODE32
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; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
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; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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EXTERN vTaskSwitchContext
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; *
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; * Permission is hereby granted, free of charge, to any person obtaining a copy of
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PUBLIC vPortYieldProcessor
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; * this software and associated documentation files (the "Software"), to deal in
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PUBLIC vPortStartFirstTask
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; * the Software without restriction, including without limitation the rights to
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; * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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#include "ISR_Support.h"
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; * the Software, and to permit persons to whom the Software is furnished to do so,
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; * subject to the following conditions:
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; *
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; Starting the first task is just a matter of restoring the context that
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; * The above copyright notice and this permission notice shall be included in all
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; was created by pxPortInitialiseStack().
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; * copies or substantial portions of the Software.
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; *
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vPortStartFirstTask:
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; * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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portRESTORE_CONTEXT
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; * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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; * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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; Manual context switch function. This is the SWI hander.
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; * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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vPortYieldProcessor:
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; *
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ADD LR, LR, #4 ; Add 4 to the LR to make the LR appear exactly
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; * https://www.FreeRTOS.org
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; as if the context was saved during and IRQ
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; * https://github.com/FreeRTOS
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; handler.
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; *
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; */
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portSAVE_CONTEXT ; Save the context of the current task...
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RSEG ICODE:CODE
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LDR R0, =vTaskSwitchContext ; before selecting the next task to execute.
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CODE32
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mov lr, pc
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BX R0
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EXTERN vTaskSwitchContext
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portRESTORE_CONTEXT ; Restore the context of the selected task.
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PUBLIC vPortYieldProcessor
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PUBLIC vPortStartFirstTask
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END
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#include "ISR_Support.h"
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; Starting the first task is just a matter of restoring the context that
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; was created by pxPortInitialiseStack().
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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vPortStartFirstTask:
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portRESTORE_CONTEXT
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; Manual context switch function. This is the SWI hander.
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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vPortYieldProcessor:
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ADD LR, LR, #4 ; Add 4 to the LR to make the LR appear exactly
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; as if the context was saved during and IRQ
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; handler.
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portSAVE_CONTEXT ; Save the context of the current task...
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LDR R0, =vTaskSwitchContext ; before selecting the next task to execute.
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mov lr, pc
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BX R0
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portRESTORE_CONTEXT ; Restore the context of the selected task.
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END
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