board.c

摩托罗拉冷火系列bootloader源码

/*
 * Copyright 2002 (C) Ken Treis; Key Technology, Inc.
 * [e-mail]
 */
#include "arch.h"
#include "mcfuart.h"
#include "ledstate.h"

char	ident[] = "Key Technology 70318";
char	copyright[] = "(C) 2002 Key Technology, Inc.";

extern unsigned int downloadPort;
extern unsigned int image_size;
extern unsigned char *xfer_addr;
extern unsigned char *down_addr;
extern unsigned char *dest_addr;
extern unsigned char *source_addr;

extern unsigned int consoleBase;

void configureConsole()
{
	consoleBase = MCFUART_BASE2;
	configureSerial(consoleBase, 19200, 60000000);
}

void configureAuxSerial() {}

void setLED(int state)
{
	unsigned char bits;
	switch(state)
	{
		case LED_STATUS_INIT:
			bits = 0;
			break;
		case LED_STATUS_MEM:
			bits = 0x06;
			break;
		case LED_STATUS_LOADIMG:		// Failed decompression, waiting for serial image
			bits = 0x04;
			break;
		case LED_STATUS_ENSWT:			// Enable Watchdog Timer, just before booting
			bits = 0;
			break;
		case LED_STATUS_DDECOMPRESS:	// start of decompress()
			bits = 0x02;
			break;
		case LED_STATUS_ENCACHE:		// about to enable cache for decompression
			bits = 0x66;
			break;
		default:						// leave alone otherwise
			return;
	}

	*(volatile unsigned short *)(MCF_MBAR + MCFSIM_PADAT)
		= (unsigned short)(bits<<8);
}

void setImageParams()
{
	downloadPort = 1;
	image_size = 0x001c0000;
	source_addr = (unsigned char *)0xf0040000;
	down_addr = (unsigned char *)0xf0040000;
	xfer_addr = (unsigned char *)0x20000;
	dest_addr = (unsigned char *)0x20000;
}

void setupBoard()
{
	volatile unsigned char	*mbar;
	mbar = (volatile unsigned char *) MCF_MBAR;

	// stuff that was added for dbug compliance (sim_init)
	mbar_writeShort(MCFSIM_SCR, 0x0003);
	mbar_writeShort(MCFSIM_SPR, 0xFFFF);
	mbar_writeLong(MCFSIM_ICR1, 0x88888888);
	mbar_writeLong(MCFSIM_ICR2, 0x88888888);
	mbar_writeLong(MCFSIM_ICR3, 0x88888888);
	mbar_writeLong(MCFSIM_ICR4, 0x88880000);
	mbar_writeLong(MCFSIM_PITR, 0x00000000);
	mbar_writeByte(MCFSIM_PIVR, 0x00000040);

	mbar_writeLong(MCFSIM_PACNT, 0x00000000);
	// Digital outputs are all on Port A
	//  2r0111011100000000
	// 16r   7   7   0   0
	mbar_writeShort(MCFSIM_PADDR, 0x7700);
	setLED(0);

	mbar_writeLong(MCFSIM_PBCNT, 0x55550000);	// Enable Ethernet 
	// Set port D to enable INT 4 and second UART
	// (See p. 17-8 in 5272 User's Manual)
	//  2r00000000000000000000111010101010
	// 16r   0   0   0   0   0   e   a   a
	mbar_writeLong(MCFSIM_PDCNT, 0x00000eaa);	
	

	// CS0: FLASH
	mbar_writeLong(MCFSIM_CSBR0, 0xF0000201);
	mbar_writeLong(MCFSIM_CSOR0, 0xFFE00014);

	// CS7: SDRAM
	// Match = 0x003xxxxx, SDRAM = 0x400, Cache Line = 0x300, Enable = 1
	mbar_writeLong(MCFSIM_CSBR7, 0x00000701);
	mbar_writeLong(MCFSIM_CSOR7, 0xFFC0007C); 
	
	// CS1, CS2, CS3, CS4, CS5, and CS6 are unused on this board.
	// CS2 is the only one of these which might ever be used;
	// it would be used for external SRAM.
	mbar_writeLong(MCFSIM_CSBR1, 0);
	mbar_writeLong(MCFSIM_CSOR1, 0);
	mbar_writeLong(MCFSIM_CSBR3, 0);
	mbar_writeLong(MCFSIM_CSOR3, 0);
	mbar_writeLong(MCFSIM_CSBR4, 0);
	mbar_writeLong(MCFSIM_CSOR4, 0);
	mbar_writeLong(MCFSIM_CSBR5, 0);
	mbar_writeLong(MCFSIM_CSOR5, 0);
	mbar_writeLong(MCFSIM_CSBR6, 0);
	mbar_writeLong(MCFSIM_CSOR6, 0);
}

void setupDRAM()
{
	volatile unsigned char *mbar = (unsigned char *)MCF_MBAR;

	mbar_writeLong(MCFSIM_SDTR, 0xF539);
	mbar_writeLong(MCFSIM_SDCR, 0x4211);

	// Dummy write to start SDRAM
	*((volatile unsigned long *)0) = 0;
}