add rl78 port

portable/Renesas/RL78/ISR_Support.h

@@ -0,0 +1,137 @@
+;/*
+; * FreeRTOS Kernel V10.2.1
+; * Copyright (C) 2019 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+; *
+; * Permission is hereby granted, free of charge, to any person obtaining a copy of
+; * this software and associated documentation files (the "Software"), to deal in
+; * the Software without restriction, including without limitation the rights to
+; * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+; * the Software, and to permit persons to whom the Software is furnished to do so,
+; * subject to the following conditions:
+; *
+; * The above copyright notice and this permission notice shall be included in all
+; * copies or substantial portions of the Software.
+; *
+; * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+; * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+; * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+; * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+; * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+; * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+; *
+; * http://www.FreeRTOS.org
+; * http://aws.amazon.com/freertos
+; *
+; * 1 tab == 4 spaces!
+; */
+
+
+;;$include "FreeRTOSConfig.h"
+
+; Variables used by scheduler
+;------------------------------------------------------------------------------
+	.EXTERN    _pxCurrentTCB
+	.EXTERN    _usCriticalNesting
+
+;------------------------------------------------------------------------------
+;   portSAVE_CONTEXT MACRO
+;   Saves the context of the general purpose registers, CS and ES registers,
+;   the usCriticalNesting Value and the Stack Pointer of the active Task
+;   onto the task stack
+;------------------------------------------------------------------------------
+portSAVE_CONTEXT .MACRO
+	PUSH      AX                    ; Save the general purpose registers.
+	PUSH      BC
+	PUSH      DE
+	PUSH      HL
+	MOV       A, ES                 ; Save ES register.
+	XCH       A, X
+	MOV       A, CS                 ; Save CS register.
+	PUSH      AX
+	MOVW      AX, !_usCriticalNesting   ; Save the usCriticalNesting value.
+	PUSH      AX
+	MOVW      AX, !_pxCurrentTCB    ; Save the Stack pointer.
+	MOVW      HL, AX
+	MOVW      AX, SP
+	MOVW      [HL], AX
+;	/* Switch stack pointers. */ ; The GNURL78 port has this. Why? (NoMaY-jp).
+;	;;MOVW      SP, #_stack /* Set stack pointer */ ; GNURL78
+;	MOVW      SP, #LOWW(__STACK_ADDR_START) /* Set stack pointer */ ; CC-RL
+	.ENDM
+;------------------------------------------------------------------------------
+
+;------------------------------------------------------------------------------
+;   portRESTORE_CONTEXT MACRO
+;   Restores the task Stack Pointer then use this to restore usCriticalNesting,
+;   general purpose registers and the CS and ES registers of the selected task
+;   from the task stack
+;------------------------------------------------------------------------------
+portRESTORE_CONTEXT .MACRO
+	MOVW      AX, !_pxCurrentTCB    ; Restore the Stack pointer.
+	MOVW      HL, AX
+	MOVW      AX, [HL]
+	MOVW      SP, AX
+	POP       AX                    ; Restore usCriticalNesting value.
+	MOVW      !_usCriticalNesting, AX
+	POP       AX                    ; Restore the CS register.
+	MOV       CS, A
+	XCH       A, X                  ; Restore the ES register.
+	MOV       ES, A
+	POP       HL                    ; Restore general purpose registers.
+	POP       DE
+	POP       BC
+	POP       AX
+	.ENDM
+;------------------------------------------------------------------------------
+
+;------------------------------------------------------------------------------
+;   portSAVE_CONTEXT_C MACRO
+;   Saves the context of the general purpose registers, CS and ES registers,
+;   the usCriticalNesting Value and the Stack Pointer of the active Task
+;   onto the task stack
+;------------------------------------------------------------------------------
+;;portSAVE_CONTEXT_C .MACRO
+;   It is assumed that the general purpose registers, CS and ES registers
+;   have been saved as follows at the beginning of an interrupt function.
+;	PUSH AX
+;	PUSH BC
+;	PUSH DE
+;	PUSH HL
+;	MOV A, ES
+;	MOV X, A
+;	MOV A, CS
+;	PUSH AX 
+;   Saves the context of the general purpose registers, CS and ES registers,
+;   the usCriticalNesting Value and the Stack Pointer of the active Task
+;;	MOVW      AX, !_usCriticalNesting   ; Save the usCriticalNesting value.
+;;	PUSH      AX
+;;	MOVW      AX, !_pxCurrentTCB    ; Save the Stack pointer.
+;;	MOVW      HL, AX
+;;	MOVW      AX, SP
+;;	MOVW      [HL], AX
+;	/* Switch stack pointers. */ ; The GNURL78 port has this. Why? (NoMaY-jp).
+;	;;MOVW      SP, #_stack /* Set stack pointer */ ; GNURL78
+;	MOVW      SP, #LOWW(__STACK_ADDR_START) /* Set stack pointer */ ; CC-RL
+;;	.ENDM
+;------------------------------------------------------------------------------
+
+;------------------------------------------------------------------------------
+;   call@ MACRO
+;   Calls subroutine using preferred addressing mode depending on memory model
+;------------------------------------------------------------------------------
+call@ .MACRO subroutine
+$ifdef __RL78_SMALL__
+	CALL      !subroutine
+$else
+$ ifdef __RL78_MEDIUM__
+	CALL      !!subroutine
+$ else
+$  ifdef __RL78_S1__
+	CALL      !subroutine
+$  else ; __RL78_S2__ or __RL78_S3__ or not defined
+	CALL      !!subroutine
+$  endif
+$ endif
+$endif
+	.ENDM
+;------------------------------------------------------------------------------