mirror of
git://projects.qi-hardware.com/xburst-tools.git
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b8407950d8
Push the config options into a config .h, tidy things, add attribution Signed-off-by: Andy Green <andy@openmoko.com>
146 lines
3.9 KiB
C
146 lines
3.9 KiB
C
/*
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* (C) Copyright 2008 Openmoko, Inc.
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* Author: Andy Green <andy@openmoko.org>
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*
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* Parse the U-Boot header and Boot Linux
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* based on various code from U-Boot
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include "kboot.h"
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#include <neo_gta02.h>
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#include "blink_led.h"
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#include <string.h>
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#define __ARM__
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#include <image.h>
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#define u32 unsigned int
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#define u16 unsigned short
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#define u8 unsigned char
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typedef unsigned int uint32_t;
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#include <setup.h>
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#include "nand_read.h"
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#include <device_configuration.h>
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#define C1_DC (1<<2) /* dcache off/on */
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#define C1_IC (1<<12) /* icache off/on */
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void bootloader_second_phase(void)
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{
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image_header_t *hdr;
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unsigned long i = 0;
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void (*the_kernel)(int zero, int arch, uint params);
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struct tag * params_base = (struct tag *)CFG_LINUX_ATAG_ADDRESS;
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struct tag *params = params_base;
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const char * cmdline = CFG_LINUX_CMDLINE;
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const char *p = cmdline;
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void * kernel_nand = (void *)(TEXT_BASE - CFG_LINUX_BIGGEST_KERNEL);
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puts("Checking kernel... ");
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if (nand_read_ll(kernel_nand, CFG_NAND_OFFSET_FOR_KERNEL_PARTITION,
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4096) < 0) {
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puts ("Kernel header read failed\n");
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goto unhappy;
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}
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hdr = (image_header_t *)kernel_nand;
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if (_ntohl(hdr->ih_magic) != IH_MAGIC) {
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puts("Unknown image magic ");
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print32(hdr->ih_magic);
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goto unhappy;
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}
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puts((const char *)hdr->ih_name);
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puts("Fetching kernel...");
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if (nand_read_ll(kernel_nand, CFG_NAND_OFFSET_FOR_KERNEL_PARTITION,
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((32 * 1024) + (_ntohl(hdr->ih_size) + sizeof(hdr) + 2048)) &
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~(2048 - 1)) < 0) {
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puts ("Kernel body read failed\n");
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goto unhappy;
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}
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puts(" Done");
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the_kernel = (void (*)(int, int, uint))
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(((char *)hdr) + sizeof(image_header_t));
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/* first tag */
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params->hdr.tag = ATAG_CORE;
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params->hdr.size = tag_size (tag_core);
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params->u.core.flags = 0;
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params->u.core.pagesize = 0;
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params->u.core.rootdev = 0;
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params = tag_next (params);
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/* revision tag */
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params->hdr.tag = ATAG_REVISION;
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params->hdr.size = tag_size (tag_revision);
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params->u.revision.rev = CFG_MACHINE_REVISION;
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params = tag_next (params);
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/* memory tags */
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params->hdr.tag = ATAG_MEM;
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params->hdr.size = tag_size (tag_mem32);
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params->u.mem.start = CFG_MEMORY_REGION_START;
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params->u.mem.size = CFG_MEMORY_REGION_SIZE;
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params = tag_next (params);
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/* kernel commandline */
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/* eat leading white space */
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for (p = cmdline; *p == ' '; p++);
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if (*p) {
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params->hdr.tag = ATAG_CMDLINE;
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params->hdr.size =
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(sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
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strcpy (params->u.cmdline.cmdline, p);
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params = tag_next (params);
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}
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/* needs to always be the last tag */
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params->hdr.tag = ATAG_NONE;
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params->hdr.size = 0;
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puts ("Running Linux --->\n\n");
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/* trash the cache */
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/* turn off I/D-cache */
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asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
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i &= ~(C1_DC | C1_IC);
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asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
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/* flush I/D-cache */
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i = 0;
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asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i));
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/* ooh that's it, we're gonna try boot this image! */
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the_kernel(0, CFG_LINUX_MACHINE_ID, (unsigned int)params_base);
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/* that didn't quite pan out */
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unhappy:
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while (1)
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blue_on(1);
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}
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