board.c

colilo,COLDFIRE MCF5282的bootloader

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

char	ident[] = "Airlib BLAB";
char	copyright[] = "(c) Airlib Inc & Embedded CL";

extern unsigned long consoleBase;

void configureConsole()
{
	consoleBase = MCFUART_BASE1;
	configureSerial(consoleBase, 9600, 40000000);
}

void configureAuxSerial() { }

void setLED(int state)
{
	*((volatile unsigned char *) (0x100001C9)) = (unsigned char)(state<<3);
}

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;

void setImageParams()
{
	downloadPort = 1;
	image_size  = 0x1c0000;
	xfer_addr   = (unsigned char *)0x00000000;
	down_addr   = (unsigned char *)0xffe04000;
	dest_addr   = (unsigned char *)0x00000000;
	source_addr = (unsigned char *)0xffe04000;
}

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

	setLED(0);

	/*
	 *	Setup chip selects...
	 */
	/* CS0 -- FLASH ROM */
	*((volatile unsigned short *) (mbar + MCFSIM_CSAR0)) = 0xffe0;
	*((volatile unsigned long *) (mbar + MCFSIM_CSMR0)) = 0x001f0000;
	// *((volatile unsigned short *) (mbar + MCFSIM_CSCR0)) = 0x0983;
	*((volatile unsigned short *) (mbar + MCFSIM_CSCR0)) = 0x099f;

	/* CS1 -- Xilinx */
	*((volatile unsigned short *) (mbar + MCFSIM_CSAR1)) = 0xd000;
	*((volatile unsigned long *) (mbar + MCFSIM_CSMR1)) = 0x001f0000;
	*((volatile unsigned short *) (mbar + MCFSIM_CSCR1)) = 0x0143;

	/* CS2 -- not used */
	*((volatile unsigned short *) (mbar + MCFSIM_CSAR2)) = 0x0000;
	*((volatile unsigned long *) (mbar + MCFSIM_CSMR2)) = 0x00000000;
	*((volatile unsigned short *) (mbar + MCFSIM_CSCR2)) = 0x0000;

	/* CS3 -- not used */
	*((volatile unsigned short *) (mbar + MCFSIM_CSAR3)) = 0x0000;
	*((volatile unsigned long *) (mbar + MCFSIM_CSMR3)) = 0x00000000;
	*((volatile unsigned short *) (mbar + MCFSIM_CSCR3)) = 0x0000;

	/* CS4 -- Not used */
	*((volatile unsigned short *) (mbar + MCFSIM_CSAR4)) = 0x0000;
	*((volatile unsigned long *) (mbar + MCFSIM_CSMR4)) = 0x00000000;
	*((volatile unsigned short *) (mbar + MCFSIM_CSCR4)) = 0x0000;

	/* CS5 -- Not used */
	*((volatile unsigned short *) (mbar + MCFSIM_CSAR5)) = 0x0000;
	*((volatile unsigned long *) (mbar + MCFSIM_CSMR5)) = 0x00000000;
	*((volatile unsigned short *) (mbar + MCFSIM_CSCR5)) = 0x0000;

	/* CS6 -- Not used */
	*((volatile unsigned short *) (mbar + MCFSIM_CSAR6)) = 0x0000;
	*((volatile unsigned long *) (mbar + MCFSIM_CSMR6)) = 0x00000000;
	*((volatile unsigned short *) (mbar + MCFSIM_CSCR6)) = 0x0000;

	/* CS7 -- Not used */
	*((volatile unsigned short *) (mbar + MCFSIM_CSAR7)) = 0x0000;
	*((volatile unsigned long *) (mbar + MCFSIM_CSMR7)) = 0x00000000;
	*((volatile unsigned short *) (mbar + MCFSIM_CSCR7)) = 0x0000;
}

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

	/*
	
	DCTR definition:

     <15>: DAEM, 1 = Drive Multiplexed Address During External Master DRAM xfer
     <14>: EDO,  1 = EDO, 0 = Normal
     <12>: RCD,  1 = 2 clk RAS-to-CAS, 0 = 1.0 clk RAS-to-CAS
  <10:09>: RSH,  10 = 3.5 clk RAS low, 01 = 2.5 clk, 00 = 1.5 clk
  <06:05>: RP,   10 = 3.5 clk RAS Precharge, 01 = 2.5 clk, 00 = 1.5 clk
     <03>: CAS,  1 = 2.5 clk CAS assertion, 0 = 1.5 clk
     <01>: CP,   1 = 1.5 CAS clk precharge, 0 = .5 clk
     <00>: CSR,  1 = 2.0 clk CAS before RAS setup, 0 = 1.0 clk

	*/

	*((volatile unsigned short *) (mbar + MCFSIM_DCRR)) = 0x0027;
	*((volatile unsigned short *) (mbar + MCFSIM_DCTR)) = 0x544B;
	*((volatile unsigned short *) (mbar + MCFSIM_DCAR0)) = 0x0000;
#ifdef CONFIG_RAM_16MB
	*((volatile unsigned long *) (mbar + MCFSIM_DCMR0)) = 0x00fe0000;
#else
	*((volatile unsigned long *) (mbar + MCFSIM_DCMR0)) = 0x003e0000;
#endif
	*((volatile unsigned char *) (mbar + MCFSIM_DCCR0)) = 0x13;
	*((volatile unsigned short *) (mbar + MCFSIM_DCAR1)) = 0x0000;
	*((volatile unsigned long *) (mbar + MCFSIM_DCMR1)) = 0x00000000;
	*((volatile unsigned char *) (mbar + MCFSIM_DCCR1)) = 0x00;

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