www.pudn.com > nxplpc2204bsp.rar > romInit.s

/* romInit.s - LPC2210 initialization module */ 
 
#define    _ASMLANGUAGE 
#include "vxWorks.h" 
#include "sysLib.h" 
#include "arch/arm/arm.h" 
/*#include "arch/arm/mmuArmLib.h"*/ 
#include "config.h" 
#include "regs.h" 
#include "lpc2210.h"     
 
    .data 
    .globl   FUNC(copyright_wind_river) 
    .long    FUNC(copyright_wind_river) 
 
/* internals */ 
 
    .globl    FUNC(romInit)    /* start of system code */ 
    .globl    FUNC(sdata)      /* start of data */ 
    .globl    _sdata 
     
/* externals */ 
 
    .globl    FUNC(romStart)    /* system initialization routine */ 
 
    .extern FUNC(excEnterUndef) 
    .extern FUNC(excEnterSwi) 
    .extern FUNC(excEnterPrefetchAbort) 
    .extern FUNC(excEnterDataAbort) 
    .extern FUNC(intEnt) 
 
_sdata: 
FUNC_LABEL(sdata) 
    .asciz    "start of data" 
    .balign    4 
 
    .text 
    .balign 4 
 
/******************************************************************************* 
* 
* romInit - entry point for VxWorks in ROM 
* 
 
* romInit 
*     ( 
*     int startType    /@ only used by 2nd entry point @/ 
*     ) 
 
* INTERNAL 
* sysToMonitor examines the ROM for the first instruction and the string 
* "Copy" in the third word so if this changes, sysToMonitor must be updated. 
*/ 
 
_ARM_FUNCTION(romInit) 
_romInit: 
/*  : 在Flash存储器的开始处添加硬件中断入口,VxWorks只提供5个异常入口 */ 
        LDR     PC, ResetAddr 
        LDR     PC, UndefinedAddr 
        LDR     PC, SWI_Addr 
        LDR     PC, PrefetchAddr 
        LDR     PC, DataAbortAddr 
        .long   0xb9205f80 
        LDR     PC, IRQ_Addr 
        LDR     PC, FIQ_Addr 
 
ResetAddr:            
	.long    cold 
UndefinedAddr:        
	.long    excEnterUndef 
SWI_Addr:             
	.long    excEnterSwi 
PrefetchAddr: 
        .long    excEnterPrefetchAbort 
DataAbortAddr: 
        .long    excEnterDataAbort 
IRQ_Addr:             
	.long    intEnt 
FIQ_Addr: 
        .long    FIQ_Handler 
 
cold: 
    MOV    r0, #BOOT_COLD    /* fall through to warm boot entry */ 
warm: 
    B    start 
 
    /* copyright notice appears at beginning of ROM (in TEXT segment) */ 
    .ascii   "Copyright 1984-2001 Wind River Systems, Inc." 
    .balign 4 
 
start: 
    MOV    r13, r0    /* Save starttype in r13 so that r0 can be used for other purposes */ 
/*  : 设置CPU核心寄存器 */ 
    LDR     R0, L$_PINSEL2 
    LDR     R1, L$_PINSEL2VAL      /* 0x0f814914 */ 
    STR     R1, [R0] 
 
    LDR     R0, L$_BCFG0 
    LDR     R1, L$_BCFG0VAL        /* 0x1000ffef */ 
    STR     R1, [R0] 
 
    LDR     R0, L$_BCFG1 
    LDR     R1, L$_BCFG1VAL        /* 0x1000ffef */ 
    STR     R1, [R0] 
 
/*  : 设置结束 */ 
 
 
    /* 
     * Initialize the stack pointer to just before where the 
     * uncompress code, copied from ROM to RAM, will run. 
     */ 
 
    MOV    r0, r13        /* restore starttype to r0 from r13 */ 
    LDR    sp, L$_STACK_ADDR 
    MOV    fp, #0            /* zero frame pointer , fp = R11 */ 
 
    /* jump to C entry point in ROM: routine - entry point + ROM base */ 
    LDR    pc, L$_rStrtInRom 
 
/******************************************************************************/ 
 
/*  中断、异常的入口 */ 
_ARM_FUNCTION(FIQ_Handler)	 
	B FIQ_Handler     
	 
/******************************************************************************/ 
 
/* 
 * PC-relative-addressable pointers - LDR Rn,=sym is broken 
 * note "_" after "$" to stop preprocessor preforming substitution 
 */ 
 
    .balign    4 
 
L$_rStrtInRom: 
    .long    ROM_TEXT_ADRS + FUNC(romStart) - FUNC(romInit) 
 
L$_PINSEL0: 
    .long    0xE002C000	/* PINSEL0 */ 
 
L$_PINSEL1: 
    .long    0xE002C004 /* PINSEL1 */ 
 
L$_PINSEL2: 
    .long    0xE002C014 /* PINSEL2 */ 
 
L$_BCFG0: 
    .long    0xFFE00000 /* BCFG0 */ 
 
L$_BCFG1: 
    .long    0xFFE00004 /* BCFG1 */ 
 
L$_PINSEL2VAL: 
    .long    0x0f814914 
     
L$_BCFG0VAL: 
    .long    0x1000ffef 
     
L$_BCFG1VAL: 
    .long    0x1000ffef 
     
L$_IO0DIR: 
    .long    0xE0028008 /* IO0DIR */ 
     
L$_IO0CLR: 
    .long    0xE002800C /* IO0CLR */ 
     
L$_IO0SET: 
    .long    0xE0028004 /* IO0SET */ 
     
     
L$_STACK_ADDR: 
    .long    STACK_ADRS 
 
L$_RomCopySize: 
    .long    L$_RomCopySize - FUNC(romInit)