board.c

colilo,COLDFIRE MCF5282的bootloader

#include "arch.h"
#include "mcfuart.h"

char	ident[] = "Motorola 5272 C3";
char	copyright[] = "(C) 1999, Moreton Bay Ventures, Rob Scott, Roland Seuhs\n(C) 2001 Key Technology, Travis Griggs, Ken Treis";

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 long consoleBase;

void configureConsole()
{
	consoleBase = MCFUART_BASE1;
	configureSerial(consoleBase, 19200, MCF_CLK);
}

void configureAuxSerial()
{
	configureSerial(MCFUART_BASE2, 115200, MCF_CLK);
}

void setLED() {};

void setImageParams()
{
	downloadPort = 1;
	image_size = 0x001c0000;
	source_addr = (unsigned char *)0xffe40000;
	down_addr = (unsigned char *)0xffe40000;
	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);
	// more stuff from dbug (gpio_init)
	mbar_writeShort(MCFSIM_PADDR, 0x0000);
	mbar_writeLong(MCFSIM_PBCNT, 0x55554155);	// PBCNT allows the console to work
	mbar_writeShort(MCFSIM_PBDDR, 0x0000);
	mbar_writeLong(MCFSIM_PDCNT, 0x00000000);

	// CS0: FLASH
	mbar_writeLong(MCFSIM_CSBR0, 0xFFE00201);
	mbar_writeLong(MCFSIM_CSOR0, 0xFFE00014);

	// CS2: External 512K SRAM -- may or may not be there
	mbar_writeLong(MCFSIM_CSBR2, 0x30000001);
	mbar_writeLong(MCFSIM_CSOR2, 0xFFF80000);

	// CS7: SDRAM
	// Match = 0x003xxxxx, SDRAM = 0x400, Cache Line = 0x300, Enable = 1
	mbar_writeLong(MCFSIM_CSBR7, 0x00000701);
	mbar_writeLong(MCFSIM_CSOR7, 0xFF00007C); 
	
	// CS1 CS3, CS4, CS5, and CS6 are unused on the M5272C3.
	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;
}