u-boot/lib_arm/bootm.c

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/*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
*
* 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
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* 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
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*
*/
#include <common.h>
#include <command.h>
#include <image.h>
#include <zlib.h>
#include <asm/byteorder.h>
DECLARE_GLOBAL_DATA_PTR;
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#if defined (CONFIG_SETUP_MEMORY_TAGS) || \
defined (CONFIG_CMDLINE_TAG) || \
defined (CONFIG_INITRD_TAG) || \
defined (CONFIG_SERIAL_TAG) || \
defined (CONFIG_REVISION_TAG) || \
defined (CONFIG_VFD) || \
defined (CONFIG_LCD)
static void setup_start_tag (bd_t *bd);
# ifdef CONFIG_SETUP_MEMORY_TAGS
static void setup_memory_tags (bd_t *bd);
# endif
static void setup_commandline_tag (bd_t *bd, char *commandline);
# ifdef CONFIG_INITRD_TAG
static void setup_initrd_tag (bd_t *bd, ulong initrd_start,
ulong initrd_end);
# endif
static void setup_end_tag (bd_t *bd);
# if defined (CONFIG_VFD) || defined (CONFIG_LCD)
static void setup_videolfb_tag (gd_t *gd);
# endif
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static struct tag *params;
#endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
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{
bd_t *bd = gd->bd;
char *s;
int machid = bd->bi_arch_number;
void (*theKernel)(int zero, int arch, uint params);
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#ifdef CONFIG_CMDLINE_TAG
char *commandline = getenv ("bootargs");
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#endif
if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
return 1;
theKernel = (void (*)(int, int, uint))images->ep;
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s = getenv ("machid");
if (s) {
machid = simple_strtoul (s, NULL, 16);
printf ("Using machid 0x%x from environment\n", machid);
}
show_boot_progress (15);
debug ("## Transferring control to Linux (at address %08lx) ...\n",
(ulong) theKernel);
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#if defined (CONFIG_SETUP_MEMORY_TAGS) || \
defined (CONFIG_CMDLINE_TAG) || \
defined (CONFIG_INITRD_TAG) || \
defined (CONFIG_SERIAL_TAG) || \
defined (CONFIG_REVISION_TAG) || \
defined (CONFIG_LCD) || \
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defined (CONFIG_VFD)
setup_start_tag (bd);
#ifdef CONFIG_SERIAL_TAG
setup_serial_tag (&params);
#endif
#ifdef CONFIG_REVISION_TAG
setup_revision_tag (&params);
#endif
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#ifdef CONFIG_SETUP_MEMORY_TAGS
setup_memory_tags (bd);
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#endif
#ifdef CONFIG_CMDLINE_TAG
setup_commandline_tag (bd, commandline);
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#endif
#ifdef CONFIG_INITRD_TAG
if (images->rd_start && images->rd_end)
setup_initrd_tag (bd, images->rd_start, images->rd_end);
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#endif
#if defined (CONFIG_VFD) || defined (CONFIG_LCD)
setup_videolfb_tag ((gd_t *) gd);
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#endif
setup_end_tag (bd);
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#endif
/* we assume that the kernel is in place */
printf ("\nStarting kernel ...\n\n");
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#ifdef CONFIG_USB_DEVICE
{
extern void udc_disconnect (void);
udc_disconnect ();
}
#endif
cleanup_before_linux ();
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theKernel (0, machid, bd->bi_boot_params);
/* does not return */
return 1;
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}
#if defined (CONFIG_SETUP_MEMORY_TAGS) || \
defined (CONFIG_CMDLINE_TAG) || \
defined (CONFIG_INITRD_TAG) || \
defined (CONFIG_SERIAL_TAG) || \
defined (CONFIG_REVISION_TAG) || \
defined (CONFIG_LCD) || \
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defined (CONFIG_VFD)
static void setup_start_tag (bd_t *bd)
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{
params = (struct tag *) bd->bi_boot_params;
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params->hdr.tag = ATAG_CORE;
params->hdr.size = tag_size (tag_core);
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params->u.core.flags = 0;
params->u.core.pagesize = 0;
params->u.core.rootdev = 0;
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params = tag_next (params);
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}
#ifdef CONFIG_SETUP_MEMORY_TAGS
static void setup_memory_tags (bd_t *bd)
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{
int i;
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for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
params->hdr.tag = ATAG_MEM;
params->hdr.size = tag_size (tag_mem32);
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params->u.mem.start = bd->bi_dram[i].start;
params->u.mem.size = bd->bi_dram[i].size;
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params = tag_next (params);
}
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}
#endif /* CONFIG_SETUP_MEMORY_TAGS */
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static void setup_commandline_tag (bd_t *bd, char *commandline)
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{
char *p;
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if (!commandline)
return;
/* eat leading white space */
for (p = commandline; *p == ' '; p++);
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/* skip non-existent command lines so the kernel will still
* use its default command line.
*/
if (*p == '\0')
return;
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params->hdr.tag = ATAG_CMDLINE;
params->hdr.size =
(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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}
#ifdef CONFIG_INITRD_TAG
static void setup_initrd_tag (bd_t *bd, ulong initrd_start, ulong initrd_end)
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{
/* an ATAG_INITRD node tells the kernel where the compressed
* ramdisk can be found. ATAG_RDIMG is a better name, actually.
*/
params->hdr.tag = ATAG_INITRD2;
params->hdr.size = tag_size (tag_initrd);
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params->u.initrd.start = initrd_start;
params->u.initrd.size = initrd_end - initrd_start;
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params = tag_next (params);
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}
#endif /* CONFIG_INITRD_TAG */
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#if defined (CONFIG_VFD) || defined (CONFIG_LCD)
extern ulong calc_fbsize (void);
static void setup_videolfb_tag (gd_t *gd)
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{
/* An ATAG_VIDEOLFB node tells the kernel where and how large
* the framebuffer for video was allocated (among other things).
* Note that a _physical_ address is passed !
*
* We only use it to pass the address and size, the other entries
* in the tag_videolfb are not of interest.
*/
params->hdr.tag = ATAG_VIDEOLFB;
params->hdr.size = tag_size (tag_videolfb);
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params->u.videolfb.lfb_base = (u32) gd->fb_base;
/* Fb size is calculated according to parameters for our panel
*/
params->u.videolfb.lfb_size = calc_fbsize();
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params = tag_next (params);
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}
#endif /* CONFIG_VFD || CONFIG_LCD */
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#ifdef CONFIG_SERIAL_TAG
void setup_serial_tag (struct tag **tmp)
{
struct tag *params = *tmp;
struct tag_serialnr serialnr;
void get_board_serial(struct tag_serialnr *serialnr);
get_board_serial(&serialnr);
params->hdr.tag = ATAG_SERIAL;
params->hdr.size = tag_size (tag_serialnr);
params->u.serialnr.low = serialnr.low;
params->u.serialnr.high= serialnr.high;
params = tag_next (params);
*tmp = params;
}
#endif
#ifdef CONFIG_REVISION_TAG
void setup_revision_tag(struct tag **in_params)
{
u32 rev = 0;
u32 get_board_rev(void);
rev = get_board_rev();
params->hdr.tag = ATAG_REVISION;
params->hdr.size = tag_size (tag_revision);
params->u.revision.rev = rev;
params = tag_next (params);
}
#endif /* CONFIG_REVISION_TAG */
static void setup_end_tag (bd_t *bd)
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{
params->hdr.tag = ATAG_NONE;
params->hdr.size = 0;
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}
#endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */