/* * (C) Copyright 2002 * Daniel Engstr鰉, Omicron Ceti AB <daniel@omicron.se>. * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA *//* now setup the General purpose bus to give us access to the LEDs. * We can then use the leds to display status information. */sc520_cdp_registers:/* size    offset        value */.word 1 ; .word 0x040 ; .long 0x00       /* SDRAM buffer control */.word 2 ; .word 0xc08 ; .long 0x0001     /* GP CS offset */.word 2 ; .word 0xc09 ; .long 0x0003     /* GP CS width */.word 2 ; .word 0xc0a ; .long 0x0001     /* GP CS width */.word 2 ; .word 0xc0b ; .long 0x0003     /* GP RD pulse width */.word 2 ; .word 0xc0c ; .long 0x0001     /* GP RD offse */.word 2 ; .word 0xc0d ; .long 0x0003     /* GP WR pulse width */.word 2 ; .word 0xc0e ; .long 0x0001     /* GP WR offset */.word 2 ; .word 0xc2c ; .long 0x0000     /* GPIO directionreg */.word 2 ; .word 0xc2a ; .long 0x0000     /* GPIO directionreg */.word 2 ; .word 0xc22 ; .long 0xffff     /* GPIO pin function 31-16 reg */.word 2 ; .word 0xc20 ; .long 0xffff     /* GPIO pin function 15-0 reg */.word 2 ; .word 0x0c4 ; .long 0x28000680 /* PAR 15 for access to led 680 */.word 0 ; .word 0x000 ; .long 0x00/* board early intialization */.globl early_board_initearly_board_init:	movl    $sc520_cdp_registers,%esiinit_loop:	movl    $0xfffef000,%edi     /* MMCR base to edi */	movw	(%esi), %bx          /* load sizer to bx */	cmpw	$0, %bx              /* if sie is 0 we're done */	je	done	xorl	%edx,%edx	movw	2(%esi), %dx        /* load MMCR offset to dx */	addl	%edx, %edi          /* add offset to base in edi */	movl	4(%esi), %eax       /* load value in eax */	cmpw	$1, %bx	je	byte                 /* byte op? */	cmpw	$2, %bx	je	word                 /* word op? */	movl	%eax, (%edi)         /* must be long, then */	jmp	nextbyte:   movb    %al,(%edi)	jmp	nextword:	movw	%ax,(%edi)next:	addl	$8, %esi             /* advance esi */	jmp	init_loop	/* the leds ad 0x80 and 0x680 should now work */done:   movb	$0x88, %al	out	%al, $0x80	movw	$0x680, %dx	out	%al, %dx	jmp 	*%ebp		     /* return to caller */.globl __show_boot_progress__show_boot_progress:	out	%al, $0x80	xchg	%al, %ah	movw	$0x680, %dx	out	%al, %dx	jmp	*%ebp