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7.3.1 C Language Startup Program (crt0mr.a30)
Figure 7.11 shows the C language startup program(crt0mr.a30).
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; ****************************************************************
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;
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; MR100 start up program for C language
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; COPYRIGHT(C) 2003,2006,2007 RENESAS TECHNOLOGY CORPORATION
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; AND RENESAS SOLUTIONS CORPORATION ALL RIGHTS RESERVED
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; MR100
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;
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; ****************************************************************
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; "$Id: crt0mr.a30 512 2007-07-09 10:11:36Z inui $"
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;*A1* 2005-02-28 for ES
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;*G0* 2006-06-15 for MR100/4
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;
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.LIST OFF
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.INCLUDE c_sec.inc
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.INCLUDE mr100.inc
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.INCLUDE sys_rom.inc
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.INCLUDE sys_ram.inc
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.LIST ON
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.GLB __SYS_INITIAL
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.GLB __END_INIT
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.GLB __init_sys,__init_tsk
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regoffset .EQU 0
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;-----------------------------------------------------------------
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; SBDATA area definition
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;-----------------------------------------------------------------
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.GLB __SB__
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.SB __SB__
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;=================================================================
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; Initialize Macro declaration
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;-----------------------------------------------------------------
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BZERO .macro TOP_,SECT_
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XOR.B R0L,R0L
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mov.l #TOP_,A1
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mov.l #sizeof SECT_,R7R5
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sstr.b
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.endm
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BCOPY .macro FROM_,TO_,SECT_
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mov.l #FROM_,A0
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mov.l #TO_,A1
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mov.l #sizeof SECT_,R7R5
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smovf.b
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.endm
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;=================================================================
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; Interrupt section start
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;-----------------------------------------------------------------
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.SECTION MR_KERNEL,CODE,ALIGN
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;-----------------------------------------------------------------
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; after reset,this program will start
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;-----------------------------------------------------------------
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__SYS_INITIAL:
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LDC #__Sys_Sp,ISP ; set initial ISP
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; MOV.B #2,0AH
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; MOV.B #00,PMOD ; Set Processor Mode Register
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; MOV.B #0,0AH ;
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LDC #00000010H,FLG
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LDC #__SB__,SB
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LDC #00000000H,FLG
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LDC #__Sys_Sp,FB
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LDC #__SB__,SB
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;=================================================================
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; MR_RAM zero clear
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;--------------------------------------------------------
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BZERO
MR_RAM_top,MR_RAM
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;=================================================================
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; NEAR area initialize.
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; FAR area initialize.