[U-Boot-Users] how to program u-boot to flash?

[Aric Wang]

Hello all,

I compiled u-boot 1.1.1 under cygwin for Coyote board with "make
ixdp425_config && make all". I use BDI2000 or Insight to load "u-boot" to
the board. It runs well after I commented out below lines in "cpu/ixp/start.
S":

	/* set EXP CS0 to the optimum timing */
	ldr	r1, =CFG_EXP_CS0
	ldr     r2, =IXP425_EXP_CS0
	str     r1, [r2]

	/* make sure flash is visible at 0 */
	ldr 	r2, =IXP425_EXP_CFG0
	ldr     r1, [r2]
	orr     r1, r1, #0x80000000
	str     r1, [r2]

	mov 	r1, #CFG_SDR_CONFIG
	ldr     r2, =IXP425_SDR_CONFIG
	str     r1, [r2]

	/* disable refresh cycles */
	mov 	r1, #0
	ldr     r3, =IXP425_SDR_REFRESH
	str	r1, [r3]

	/* send nop command */
	mov 	r1, #3
	ldr	r4, =IXP425_SDR_IR
	str	r1, [r4]
	DELAY_FOR 0x4000, r0

	/* set SDRAM internal refresh val */
	ldr	r1, =CFG_SDRAM_REFRESH_CNT
	str     r1, [r3]
	DELAY_FOR 0x4000, r0

	/* send precharge-all command to close all open banks */
	mov     r1, #2
	str     r1, [r4]
	DELAY_FOR 0x4000, r0

	/* provide 8 auto-refresh cycles */
	mov     r1, #4
	mov     r5, #8
111:    str	r1, [r4]
	DELAY_FOR 0x100, r0
	subs	r5, r5, #1
	bne	111b

	/* set mode register in sdram */
	mov	r1, #1
	str	r1, [r4]
	DELAY_FOR 0x4000, r0

	/* send normal operation command */
	mov	r1, #6
	str	r1, [r4]
	DELAY_FOR 0x4000, r0

If I don't comment out this, it will die on "mov r1, #4" or "mov r1, #1".

Can anyone tell me why?

My second question is how to program the u-boot to flash under BDI2000.

I've tried to program "u-boot" and "u-boot.bin" to 0x50000000 under BDI2000.
I can run it under BDI2000 by "go 0x50000000". But after I unplug the
BDI2000 from the Coyote board, it can't run (There's nothing on console).

Thanks in advance.