cstartup.s31

瑞萨R5G0C514使用

;------------------------------------------------------------------------
;                                                                       |
;   FILE        :cstartup.s31                                           |
;   DATE        :Wed, Jan 14, 2009                                      |
;   DESCRIPTION :cstartup file                                          |
;   CPU GROUP   :38D2                                                   |
;                                                                       |
;   This file is generated by Renesas Project Generator (Ver.4.9).      |
;                                                                       |
;------------------------------------------------------------------------
;/*******************************************************************************
;                                                                               *
;   file name   : cstartup.s31                                                  *
;                                                                               *
;   Version     : 1.0  ( 2005-11-01 )                                           *
;                                                                               *
;   Copyright(C) 2005. Renesas Technology Corp., All rights reserved.           *
;                                                                               *
;       note:                                                                   *
;       This file containes the 740 C startup routine and must                  *
;       usually be tailored to suit your system.                                *
;       You probably want to set up the mode register and you may have          *
;       to change the interrupt vectors and reset vector.                       *
;********************************************************************************/
;/*
; note:
;   This data is a freeware.
;   RENESAS TECHNOLOGY CORPORATION assumes no responsibility for any damage
;   that occurred by this data.
;*/

#include "mcu_def.inc"

;; ==========================================================================;
;   Turning off 'interruptable ISRs'							             ;
;; ==========================================================================;
; Do this if you need the extra byte(s)
;
; 1. Uncomment the define below
; 2. Assemble this file
; 3. Include the result in your linker command file:
;    -C cstartup.r31
;
; Variable '?IES_USAGE' and its initialization will no longer
; be included.
;; ==========================================================================;
;#define NO_INTERRUPTABLE_ISR

	NAME  CSTARTUP

	EXTERN  main			; where to begin execution
	EXTERN  __low_level_init
	DEFFN   __low_level_init(32768,0,0,0)
	EXTERN  exit			; where to go when program is done
	DEFFN   exit(32770,0,0,0)

	PUBLIC  ?INTERRUPT_EXPR_STACK	; Start address for interrupt

	PUBLIC  ?CSTARTUP_INTVEC ; start (base address) of interrupt vector
	PUBLIC  ?CSTARTUP_RESETVEC	; Location of reset vector


; ==========================================================================;
;  CSTACK - The C stack segment                                 			;
;                                                               			;
;  Please, see in the link file lnk*.xcl how to increment       			;
;  the stack size without having to reassemble cstartup.s31 !   			;
; ==========================================================================;

	RSEG  CSTACK:ROOT
	BLKB  0

; ==========================================================================;
;  EXPR_STACK - The expression stack segment                    			;
;                                                               			;
;  Please, see in the link file lnk*.xcl how to increment       			;
;  the stack size without having to reassemble cstartup.s31 !   			;
; ==========================================================================;

        RSEG    EXPR_STACK:ROOT
        BLKB    0


; ==========================================================================;
;  INT_EXPR_STACK - The interrupt expression stack segment      			;
;                                                               			;
;  Please, see in the link file lnk*.xcl how to increment       			;
;  the stack size without having to reassemble cstartup.s31 !   			;
; ==========================================================================;

        RSEG    INT_EXPR_STACK:ROOT
        BLKB    0


#ifndef NO_INTERRUPTABLE_ISR
; ==========================================================================;
;  ?IES_USAGE - Determines if the IES is setup and used.					;
;																			;
;  This variable is used for interrupt functions when compiling				;
;  with the '-h' option.													;
; ==========================================================================;

	RSEG	ZPAGE
	PUBLIC	?IES_USAGE
?IES_USAGE:
	BLKB	1
#endif


; ==========================================================================;
; This will insert the information needed by interrupts who use 			;
; the interrupt expression stack. Do not alter it!              			;
; ==========================================================================;

	RSEG  CONST
?INTERRUPT_EXPR_STACK:
	BYTE  SFE(INT_EXPR_STACK)

; ==========================================================================;
;  Forward declarations of segment used during initialization   			;
; ==========================================================================;
	RSEG  Z_UDATA
	RSEG  Z_IDATA
	RSEG  Z_CDATA
	RSEG  N_UDATA
	RSEG  N_IDATA
	RSEG  N_CDATA
	RSEG  ECSTR
	RSEG  RF_STACK

	RSEG  CCSTR
	RSEG  CONST
	RSEG  CSTR


; ==========================================================================;
;  RCODE - where the execution actually begins                  			;
; ==========================================================================;
	RSEG  RCODE:ROOT
init_C
        CLD                             ; set default mode
        CLT
        LDM  #CPUM_INIT, 3BH            ; set stack page
        LDX  #LOW (SFE(CSTACK)-1)		; set up stack pointer
        TXS

#ifndef NO_INTERRUPTABLE_ISR
; ==========================================================================;
;  Initialize ?IES_USAGE:													;
;   1   IES not used														;
;   0   First use of IES, need to setup IES									;
;  <0   IES already setup and used											;
; ==========================================================================;
        LDA  #1
        STA  zp:?IES_USAGE
#endif

; ==========================================================================;
; If hardware must be initiated from assembly or if interrupts  			;
; should be on when reaching main, this is the place to insert  			;
; such code.                                                    			;
;                                                               			;
; NOTE: You probably want to initialize the mode register here. 			;
; ==========================================================================;
; ==========================================================================;
; Call __low_level_init to perform initialization before        			;
; initializing segments and calling main.                       			;
; If the function returns 0 no segment initialization should    			;
; take place.                                                   			;
;                                                               			;
; Link with your own version of __low_level_init to override    			;
; the default action: to do nothing but return 1.               			;
; ==========================================================================;

        LDX  #SFE(EXPR_STACK)        ; set up expression stack
	JSR  __low_level_init
	TAY			     ; test return value
	BEQ  skip_seg_init


; ==========================================================================;
; If it is not a requirement that static/global data is set     			;
; to zero or to some explicit value at startup, the following   			;
; line refering to seg_init can be deleted, or commented.       			;
; ==========================================================================;

	JSR  seg_init                ; initialize data segments
        LDX     #SFE(EXPR_STACK)     ; set up expression stack (again)
				     ; as seg_init destroys it
skip_seg_init

; ==========================================================================;
; Set up expression stack                                       			;
; ==========================================================================;

expr_stack_start EQU  SFE(EXPR_STACK)

	LIMIT  expr_stack_start,0,100h,"Expression stack out of range"

        LDX     #expr_stack_start & 255  ; load initial expr stack pointer

	JSR  main      ; execute main()

; ==========================================================================;