crt0.c

s1d13716的源码 windiws ce 或8位单片机

/*	$id:crt0.c	V1.0	2001/11/13	*/

/*******************************************************************************
 *	This source code has been made available to you by EPSON on an AS-IS
 *	basis. Anyone receiving this source is licensed under EPSON 
 *	copyrights to use it in any way he or she deems fit, including 
 *	copying it, modifying it, compiling it, and redistributing it either 
 *	with or without modifications.
 *
 *	Any person who transfers this source code or any derivative work 
 *	must include the EPSON copyright notice, this paragraph, and the 
 *	preceding two paragraphs in the transferred software.
 *
 *	COPYRIGHT	EPSON CORPORATION	2001
 *	LICENSED MATERIAL	-	PROGRAM PROPERTY OF EPSON
 ******************************************************************************/
 
/******************************************************************************
 *	File	:	crt0.c
 *	MODULE	:	
 *
 *	PURPOSE	:	
 *
 *	AUTHOR	:	Zhou Xiaohu
 *	GROUP	:	Kernel Group
 *	DATE CREATED			:	2001/11/13
 *	REFERENCE DOCUMENT ID	:	Detailed Design of DDI
 *	MODIFICATION:
 *		DATE		userName		Description
 *		2001/11/13	Zhou Xiaohu		start
 *		2001/12/04	Zhou Xiaohu		add support to burn mode: copy data section and clear bss section
 *		2001/12/04	Zhou Xiaohu		support to copy CODE section, add preprosessor option
 *		2001/12/10	Zhou Xiaohu		codes rearrange
 *		2001/12/17	Zhou Xiaohu		RTL: 0x850000 ~ 0x87ffff
 *		2001/12/18	Zhou Xiaohu		implement _init_buc
 *****************************************************************************/

/* for init lib */
#include <smcvals.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

#include "int.h"
#include "bcu.h"
#include "idma.h"
#include "ct.h"
#include "io.h"

/********************************************************************************
 *																				*
 *								for _init_lib									*
 *																				*
 ********************************************************************************/

//#define BURN
//#define FLASHBURN
//#define MOVEVECTOR

/* definition for all */

/* user main function */
extern  void main(void);

/* exit */
void _exit(void);
void dummy(void);


/*******************************************************************************
 * _init_bcu
 *   Type :	void
 *   Ret val :	none
 *   Argument :	void
 *   Function :	Initialize BCU.
 *******************************************************************************/
void _init_bcu(void)
{
	// [0x4812E] bus control register setting: BCLK output enable; Burst ROM burst length is 8; 
	// external interface method is #BSL system; #WAIT pin enable.
	*(volatile unsigned short *)BCU_SWAITE_ADDR = BCU_RBCLK_ENA | BCU_RBST8_8 | BCU_SBUSST_BSL | BCU_SWAITE_DIS;
	//*(volatile unsigned short *)BCU_SWAITE_ADDR = BCU_RBCLK_ENA | BCU_RBST8_8 | BCU_SBUSST_BSL | BCU_SWAITE_ENA;
	
	// [0x48130] DRAM timing setup register setting: CEFUNC1 = '1' CEFUNC0 = 'x'.
	*(volatile unsigned short *)BCU_RASC_ADDR =  BCU_CEFUNC_COM;
	
	// [48120] Areas 15-18 setup register setting: (15 and 16 )Device size 16 bits, Output disable delay 0.5, Wait control 2.
	*(volatile unsigned short *)BCU_A15_A18_ADDR = BCU_SZH_16 | BCU_DFH_05 | BCU_WTH_1;

	// [0x48122] Areas 13-14 setup register setting: device size 16 bits ，Output disable delay 2.5，Wait control 2.
	*(volatile unsigned short *)BCU_A13_A14_ADDR = BCU_SZL_16 | BCU_DFL_25 | BCU_WTL_2;
	
	// [0x48124] Areas 11-12( 0x1000000~0x17FFFFF; 0x1800000~1FFFFFF ) setup register setting: device size 16 bits ，Output disable delay 2.5，Wait control 2.
	*(volatile unsigned short *)BCU_A11_A12_ADDR = BCU_SZL_8 | BCU_DFL_25 | BCU_WTL_2;
	//*(volatile unsigned short *)BCU_A11_A12_ADDR = BCU_SZL_16 | BCU_DFL_05 | BCU_WTL_2;
	// [0x48126] Area 9-10 setup register setting: device size 16 bits, output disable delay 0.5, wait control 2
	*(volatile unsigned short *)BCU_A9_A10_ADDR = BCU_SZL_16 | BCU_DFL_15 | BCU_WTL_2;
	
	// [0x48126] Area 9-10 setup register setting: device size 16 bits, output disable delay 0.5, wait control 2, area 9,10 use burst mode, burst wait cycle is 1
	//*(volatile unsigned short *)BCU_A9_A10_ADDR = BCU_SZL_16 | BCU_DFL_25 | BCU_WTL_1 | BCU_BROH_USE | BCU_BROL_USE | BCU_BW_0;
		
	// [0x48128] Area 7-8( 0x400000~0x5FFFFF; 0x600000~0x7FFFFF ) setup register setting: Device size 16 bits, output disable delay 3.5, wait control 7, DRAM is not used in area 8
	*(volatile unsigned short *)BCU_A7_A8_ADDR = BCU_DRAH_NOT | BCU_DRAL_NOT | BCU_SZL_16 | BCU_DFL_05 | BCU_WTL_3;

	// [0x4812A] Area 4-6 setup register setting: Device size 16 bits, output disable delay 3.5, wait control 7 in area 4,5,6
	*(volatile unsigned short *)BCU_A4_A5_A6_ADDR = BCU_DFH_35 | BCU_WTH_7 | BCU_SZL_16 | BCU_DFL_35 | BCU_WTL_7;
	
	// [4813A] BCLK select register setting: area1 access speed is 2 cycles when use x2speed mode, BCLK output PLL CLK
	*(volatile unsigned short *)BCU_BCLKSEL_ADDR = BCU_BCLKSEL_OSC3 | BCU_A1X1MD;
	/* to be continued */
}

/*******************************************************************************
 * _init_int
 *   Type :	void
 *   Ret val :	none
 *   Argument :	void
 *   Function :	Initialize interrupt controller.
 *******************************************************************************/
void _init_int(void)
{	
	/* Disable all interrupt enable register */
	*(volatile unsigned char *)INT_EP0_EK_ADDR		= INT_ENABLE_DIS;
	*(volatile unsigned char *)INT_EHDM_EIDM_ADDR	= INT_ENABLE_DIS;
	*(volatile unsigned char *)INT_E16T0_E16T1_ADDR	= INT_ENABLE_DIS;
	*(volatile unsigned char *)INT_E16T2_E16T3_ADDR	= INT_ENABLE_DIS;
	*(volatile unsigned char *)INT_E16T4_E16T5_ADDR	= INT_ENABLE_DIS;
	*(volatile unsigned char *)INT_E8TU_ADDR		= INT_ENABLE_DIS;
	*(volatile unsigned char *)INT_ES_ADDR			= INT_ENABLE_DIS;
	*(volatile unsigned char *)INT_EADE_ECTM_EP4_ADDR = INT_ENABLE_DIS;

	/* Reset all interrupt cause flag register (interrupt factor flag reset is read only mode) */
	*(volatile unsigned char *)INT_FP0_FK_ADDR		= INT_FLAG_RST;
	*(volatile unsigned char *)INT_FHDM_FIDM_ADDR	= INT_FLAG_RST;
	*(volatile unsigned char *)INT_F16T0_F16T1_ADDR	= INT_FLAG_RST;
	*(volatile unsigned char *)INT_F16T2_F16T3_ADDR	= INT_FLAG_RST;
	*(volatile unsigned char *)INT_F16T4_F16T5_ADDR	= INT_FLAG_RST;
	*(volatile unsigned char *)INT_F8TU_ADDR		= INT_FLAG_RST;
	*(volatile unsigned char *)INT_FS_ADDR			= INT_FLAG_RST;
	*(volatile unsigned char *)INT_FADE_FCTM_FP4_ADDR = INT_FLAG_RST;

	/* Set all interrupt IDMA request register CPU request disable */
	*(volatile unsigned char *)INT_RP0_RHDM_R16T0_ADDR	= INT_RIDMA_DIS;
	*(volatile unsigned char *)INT_R16T1_R16T4_ADDR		= INT_RIDMA_DIS;
	*(volatile unsigned char *)INT_R16T5_R8TU_RS0_ADDR	= INT_RIDMA_DIS;
	*(volatile unsigned char *)INT_RS1_RADE_RP4_ADDR	= INT_RIDMA_DIS;

	/* Set all IDMA disable */
	*(volatile unsigned char *)IDMA_DEP0_DEHDM_DE16T0_ADDR	= IDMA_DEIDMA_DIS;
	*(volatile unsigned char *)IDMA_DE16T1_DE16T4_ADDR		= IDMA_DEIDMA_DIS;
	*(volatile unsigned char *)IDMA_DE16T5_DE8TU_DES0_ADDR	= IDMA_DEIDMA_DIS;
	*(volatile unsigned char *)IDMA_DES1_DEADE_DEP4_ADDR	= IDMA_DEIDMA_DIS;
}

/*******************************************************************************
 *	FUNCTION	:	_init_tod
 *	
 *	PURPOSE		:	Init Time of Day
 *
 *	PARAMETERS
 *		Input:
 *		Output:
 *		InOut:
 *	Return Value:
 *	Reentrant:
 ******************************************************************************/
void _init_tod(void)
{
	/* Set clock timer interrupt disable on interrupt controller */
	//*(volatile unsigned char *)INT_EADE_ECTM_EP4_ADDR = INT_ENABLE_DIS;
	*(volatile unsigned char *)INT_EADE_ECTM_EP4_ADDR &= 0xfd;	// zxh 2001-12-19

	/* Stop clock timer */
	*(volatile unsigned char *)CT_TCRUN_ADDR &= 0xfe;

	/* Reset clock timer */
	*(volatile unsigned char *)CT_TCRUN_ADDR |= CT_TCRST_RST;

	/* Set clock timer data (1999.01.01 21:50) */
	*(volatile unsigned char *)CT_TCHD_ADDR = 50;//0x32	// Minute data (5 minutes)
	*(volatile unsigned char *)CT_TCDD_ADDR = 21;//0x15	// Hour data (21 hours)
	*(volatile unsigned char *)CT_TCNDL_ADDR = 0xd7;	// Year-month-day low byte data (3287 days)
	*(volatile unsigned char *)CT_TCNDH_ADDR = 0x0c;	// Year-month-day high byte data (3287 days)

	/* Set clock timer interrupt factor control flag, 0x40152 */
	*(volatile unsigned char *)CT_TCAF_ADDR = CT_TCISE_NONE | CT_TCASE_M | CT_TCIF_RST | CT_TCAF_RST;

	/* Set clock timer interrupt priority level 3 on interrupt controller */
	*(volatile unsigned char *)INT_PCTM_ADDR = INT_PRIL_LVL3;

	/* Reset clock timer interrupt factor flag on interrupt controller */
	*(volatile unsigned char *)INT_FADE_FCTM_FP4_ADDR = INT_FCTM;

	/* Set clock timer interrupt enable on interrupt controller */
	//*(volatile unsigned char *)INT_EADE_ECTM_EP4_ADDR = INT_ECTM;
	*(volatile unsigned char *)INT_EADE_ECTM_EP4_ADDR |= INT_ECTM;	// zxh 2001-12-19

	/* Run Clock Timer */
	*(volatile unsigned char *)CT_TCRUN_ADDR |= 0x01;
}

/*******************************************************************************
 *	FUNCTION	:	boot
 *	
 *	PURPOSE		:	boot
 *
 *	PARAMETERS
 *		Input:
 *		Output:
 *		InOut:
 *	Return Value:
 *	Reentrant:
 ******************************************************************************/
void boot(void)
{
	/* Initialize Hardware */
	asm("xld.w	%r8,0x1fff");	/* Set SP in end of 8KB internal RAM */
	asm("ld.w	%sp,%r8");
	asm("ld.w	%r8,0b10000");	/* Set PSR to interrupt enable */
	asm("ld.w	%psr,%r8");
	asm("xld.w	%r8,0x0");		/* Set GPR is 0x0 */

	_init_bcu();			/* Initialize BCU on boot time */
	_init_int();			/* Initialize interrupt controller */
	//_init_tod();			/* Initialize Time of Day */
	
	main();					/* Call main */
	_exit();
}


/*******************************************************************************
 *	FUNCTION	:	dummy
 *	
 *	PURPOSE		:
 *
 *	PARAMETERS
 *		Input:
 *		Output:
 *		InOut:
 *	Return Value:
 *	Reentrant:
 ******************************************************************************/
void dummy(void)
{
INT_LOOP:
	goto	INT_LOOP;
}

/*******************************************************************************
 *	FUNCTION	:	addr_err
 *	
 *	PURPOSE		:	Address Error Handler
 *
 *	PARAMETERS
 *		Input:
 *		Output:
 *		InOut:
 *	Return Value:
 *	Reentrant:
 ******************************************************************************/
void add_err(void)
{
INT_LOOP:
	goto	INT_LOOP;
}

/*******************************************************************************
 *	FUNCTION	:	_exit
 *	
 *	PURPOSE		:
 *
 *	PARAMETERS
 *		Input:
 *		Output:
 *		InOut:
 *	Return Value:
 *	Reentrant:
 ******************************************************************************/
void _exit(void)
{
INT_LOOP:
	goto	INT_LOOP;
}

static void delay()
{
	unsigned int iDelay;
	for(iDelay=0;iDelay<50000;iDelay++)//38.4M 1 wite~=26200us
	{
	asm("nop");
	}
}