blob: d5e019e3a4c2524ddd8c543a2d19ee59cc0e6106 [file] [log] [blame]
/*
* (C) Copyright 2008 Semihalf
*
* (C) Copyright 2000-2006
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* 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
*/
#define DEBUG
#include <common.h>
#include <watchdog.h>
#include <command.h>
#include <image.h>
#include <malloc.h>
#include <zlib.h>
#include <bzlib.h>
#include <environment.h>
#include <asm/byteorder.h>
#if defined(CONFIG_OF_LIBFDT)
#include <fdt.h>
#include <libfdt.h>
#include <fdt_support.h>
static void fdt_error (const char *msg);
static void get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
bootm_headers_t *images, char **of_flat_tree, ulong *of_size);
static ulong fdt_relocate (ulong alloc_current,
cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
char **of_flat_tree, ulong *of_size);
#endif
#ifdef CFG_INIT_RAM_LOCK
#include <asm/cache.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
static ulong get_sp (void);
static void set_clocks_in_mhz (bd_t *kbd);
void __attribute__((noinline))
do_bootm_linux(cmd_tbl_t *cmdtp, int flag,
int argc, char *argv[],
bootm_headers_t *images,
int verify)
{
ulong sp, sp_limit, alloc_current;
ulong initrd_start, initrd_end;
ulong rd_data_start, rd_data_end, rd_len;
ulong cmd_start, cmd_end;
bd_t *kbd;
ulong ep = 0;
void (*kernel)(bd_t *, ulong, ulong, ulong, ulong);
#if defined(CONFIG_OF_LIBFDT)
char *of_flat_tree = NULL;
ulong of_size = 0;
#endif
/*
* Booting a (Linux) kernel image
*
* Allocate space for command line and board info - the
* address should be as high as possible within the reach of
* the kernel (see CFG_BOOTMAPSZ settings), but in unused
* memory, which means far enough below the current stack
* pointer.
*/
sp = get_sp();
debug ("## Current stack ends at 0x%08lx ", sp);
alloc_current = sp_limit = get_boot_sp_limit(sp);
debug ("=> set upper limit to 0x%08lx\n", sp_limit);
/* allocate space and init command line */
alloc_current = get_boot_cmdline (alloc_current, &cmd_start, &cmd_end);
/* allocate space for kernel copy of board info */
alloc_current = get_boot_kbd (alloc_current, &kbd);
set_clocks_in_mhz(kbd);
/* find kernel entry point */
if (images->legacy_hdr_valid) {
ep = image_get_ep (images->legacy_hdr_os);
#if defined(CONFIG_FIT)
} else if (images->fit_uname_os) {
fit_unsupported_reset ("PPC linux bootm");
do_reset (cmdtp, flag, argc, argv);
#endif
} else {
puts ("Could not find kernel entry point!\n");
do_reset (cmdtp, flag, argc, argv);
}
kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))ep;
/* find ramdisk */
get_ramdisk (cmdtp, flag, argc, argv, images, verify,
IH_ARCH_PPC, &rd_data_start, &rd_data_end);
rd_len = rd_data_end - rd_data_start;
alloc_current = ramdisk_high (alloc_current, rd_data_start, rd_len,
kbd, sp_limit, get_sp (),
&initrd_start, &initrd_end);
#if defined(CONFIG_OF_LIBFDT)
/* find flattened device tree */
get_fdt (cmdtp, flag, argc, argv, images, &of_flat_tree, &of_size);
alloc_current = fdt_relocate (alloc_current,
cmdtp, flag, argc, argv, &of_flat_tree, &of_size);
/*
* Add the chosen node if it doesn't exist, add the env and bd_t
* if the user wants it (the logic is in the subroutines).
*/
if (of_size) {
if (fdt_chosen(of_flat_tree, initrd_start, initrd_end, 0) < 0) {
fdt_error ("/chosen node create failed");
do_reset (cmdtp, flag, argc, argv);
}
#ifdef CONFIG_OF_HAS_UBOOT_ENV
if (fdt_env(of_flat_tree) < 0) {
fdt_error ("/u-boot-env node create failed");
do_reset (cmdtp, flag, argc, argv);
}
#endif
#ifdef CONFIG_OF_HAS_BD_T
if (fdt_bd_t(of_flat_tree) < 0) {
fdt_error ("/bd_t node create failed");
do_reset (cmdtp, flag, argc, argv);
}
#endif
#ifdef CONFIG_OF_BOARD_SETUP
/* Call the board-specific fixup routine */
ft_board_setup(of_flat_tree, gd->bd);
#endif
}
#endif /* CONFIG_OF_LIBFDT */
debug ("## Transferring control to Linux (at address %08lx) ...\n",
(ulong)kernel);
show_boot_progress (15);
#if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
unlock_ram_in_cache();
#endif
#if defined(CONFIG_OF_LIBFDT)
if (of_flat_tree) { /* device tree; boot new style */
/*
* Linux Kernel Parameters (passing device tree):
* r3: pointer to the fdt, followed by the board info data
* r4: physical pointer to the kernel itself
* r5: NULL
* r6: NULL
* r7: NULL
*/
(*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);
/* does not return */
}
#endif
/*
* Linux Kernel Parameters (passing board info data):
* r3: ptr to board info data
* r4: initrd_start or 0 if no initrd
* r5: initrd_end - unused if r4 is 0
* r6: Start of command line string
* r7: End of command line string
*/
(*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
/* does not return */
}
static ulong get_sp (void)
{
ulong sp;
asm( "mr %0,1": "=r"(sp) : );
return sp;
}
static void set_clocks_in_mhz (bd_t *kbd)
{
char *s;
if ((s = getenv ("clocks_in_mhz")) != NULL) {
/* convert all clock information to MHz */
kbd->bi_intfreq /= 1000000L;
kbd->bi_busfreq /= 1000000L;
#if defined(CONFIG_MPC8220)
kbd->bi_inpfreq /= 1000000L;
kbd->bi_pcifreq /= 1000000L;
kbd->bi_pevfreq /= 1000000L;
kbd->bi_flbfreq /= 1000000L;
kbd->bi_vcofreq /= 1000000L;
#endif
#if defined(CONFIG_CPM2)
kbd->bi_cpmfreq /= 1000000L;
kbd->bi_brgfreq /= 1000000L;
kbd->bi_sccfreq /= 1000000L;
kbd->bi_vco /= 1000000L;
#endif
#if defined(CONFIG_MPC5xxx)
kbd->bi_ipbfreq /= 1000000L;
kbd->bi_pcifreq /= 1000000L;
#endif /* CONFIG_MPC5xxx */
}
}
#if defined(CONFIG_OF_LIBFDT)
static void fdt_error (const char *msg)
{
puts ("ERROR: ");
puts (msg);
puts (" - must RESET the board to recover.\n");
}
static void get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
{
ulong fdt_addr;
image_header_t *fdt_hdr;
char *fdt_blob = NULL;
ulong image_start, image_end;
ulong load_start, load_end;
#if defined(CONFIG_FIT)
void *fit_hdr;
const char *fit_uname_config = NULL;
const char *fit_uname_fdt = NULL;
ulong default_addr;
#endif
if (argc > 3) {
#if defined(CONFIG_FIT)
/*
* If the FDT blob comes from the FIT image and the FIT image
* address is omitted in the command line argument, try to use
* ramdisk or os FIT image address or default load address.
*/
if (images->fit_uname_rd)
default_addr = (ulong)images->fit_hdr_rd;
else if (images->fit_uname_os)
default_addr = (ulong)images->fit_hdr_os;
else
default_addr = load_addr;
if (fit_parse_conf (argv[3], default_addr,
&fdt_addr, &fit_uname_config)) {
debug ("* fdt: config '%s' from image at 0x%08lx\n",
fit_uname_config, fdt_addr);
} else if (fit_parse_subimage (argv[3], default_addr,
&fdt_addr, &fit_uname_fdt)) {
debug ("* fdt: subimage '%s' from image at 0x%08lx\n",
fit_uname_fdt, fdt_addr);
} else
#endif
{
fdt_addr = simple_strtoul(argv[3], NULL, 16);
debug ("* fdt: cmdline image address = 0x%08lx\n",
fdt_addr);
}
debug ("## Checking for 'FDT'/'FDT image' at %08lx\n",
fdt_addr);
/* copy from dataflash if needed */
fdt_addr = gen_get_image (fdt_addr);
/*
* Check if there is an FDT image at the
* address provided in the second bootm argument
* check image type, for FIT images get a FIT node.
*/
switch (gen_image_get_format ((void *)fdt_addr)) {
case IMAGE_FORMAT_LEGACY:
debug ("* fdt: legacy format image\n");
fdt_hdr = (image_header_t *)fdt_addr;
printf ("## Flattened Device Tree Legacy Image at %08lx\n",
fdt_hdr);
image_print_contents (fdt_hdr);
image_start = (ulong)fdt_hdr;
image_end = image_get_image_end (fdt_hdr);
load_start = image_get_load (fdt_hdr);
load_end = load_start + image_get_data_size (fdt_hdr);
if ((load_start < image_end) && (load_end > image_start)) {
fdt_error ("fdt overwritten");
do_reset (cmdtp, flag, argc, argv);
}
puts (" Verifying Checksum ... ");
if (!image_check_hcrc (fdt_hdr)) {
fdt_error ("fdt header checksum invalid");
do_reset (cmdtp, flag, argc, argv);
}
if (!image_check_dcrc (fdt_hdr)) {
fdt_error ("fdt checksum invalid");
do_reset (cmdtp, flag, argc, argv);
}
puts ("OK\n");
if (!image_check_type (fdt_hdr, IH_TYPE_FLATDT)) {
fdt_error ("uImage is not a fdt");
do_reset (cmdtp, flag, argc, argv);
}
if (image_get_comp (fdt_hdr) != IH_COMP_NONE) {
fdt_error ("uImage is compressed");
do_reset (cmdtp, flag, argc, argv);
}
if (fdt_check_header ((char *)image_get_data (fdt_hdr)) != 0) {
fdt_error ("uImage data is not a fdt");
do_reset (cmdtp, flag, argc, argv);
}
memmove ((void *)image_get_load (fdt_hdr),
(void *)image_get_data (fdt_hdr),
image_get_data_size (fdt_hdr));
fdt_blob = (char *)image_get_load (fdt_hdr);
break;
#if defined(CONFIG_FIT)
case IMAGE_FORMAT_FIT:
/* check FDT blob vs FIT hdr */
if (fit_uname_config || fit_uname_fdt) {
/*
* FIT image
*/
fit_hdr = (void *)fdt_addr;
debug ("* fdt: FIT format image\n");
fit_unsupported_reset ("PPC fdt");
do_reset (cmdtp, flag, argc, argv);
} else {
/*
* FDT blob
*/
printf ("## Flattened Device Tree blob at %08lx\n", fdt_blob);
fdt_blob = (char *)fdt_addr;
}
break;
#endif
default:
fdt_error ("Did not find a cmdline Flattened Device Tree");
do_reset (cmdtp, flag, argc, argv);
}
printf (" Booting using the fdt blob at 0x%x\n", fdt_blob);
} else if (images->legacy_hdr_valid &&
image_check_type (images->legacy_hdr_os, IH_TYPE_MULTI)) {
ulong fdt_data, fdt_len;
/*
* Now check if we have a legacy multi-component image,
* get second entry data start address and len.
*/
printf ("## Flattened Device Tree from multi "
"component Image at %08lX\n",
(ulong)images->legacy_hdr_os);
image_multi_getimg (images->legacy_hdr_os, 2, &fdt_data, &fdt_len);
if (fdt_len) {
fdt_blob = (char *)fdt_data;
printf (" Booting using the fdt at 0x%x\n", fdt_blob);
if (fdt_check_header (fdt_blob) != 0) {
fdt_error ("image is not a fdt");
do_reset (cmdtp, flag, argc, argv);
}
if (be32_to_cpu (fdt_totalsize (fdt_blob)) != fdt_len) {
fdt_error ("fdt size != image size");
do_reset (cmdtp, flag, argc, argv);
}
} else {
fdt_error ("Did not find a Flattened Device Tree "
"in a legacy multi-component image");
do_reset (cmdtp, flag, argc, argv);
}
} else {
debug ("## No Flattened Device Tree\n");
*of_flat_tree = NULL;
*of_size = 0;
return;
}
*of_flat_tree = fdt_blob;
*of_size = be32_to_cpu (fdt_totalsize (fdt_blob));
debug (" of_flat_tree at 0x%08lx size 0x%08lx\n",
*of_flat_tree, *of_size);
}
static ulong fdt_relocate (ulong alloc_current,
cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
char **of_flat_tree, ulong *of_size)
{
char *fdt_blob = *of_flat_tree;
ulong relocate = 0;
ulong new_alloc_current;
/* nothing to do */
if (*of_size == 0)
return alloc_current;
if (fdt_check_header (fdt_blob) != 0) {
fdt_error ("image is not a fdt");
do_reset (cmdtp, flag, argc, argv);
}
#ifndef CFG_NO_FLASH
/* move the blob if it is in flash (set relocate) */
if (addr2info ((ulong)fdt_blob) != NULL)
relocate = 1;
#endif
#ifdef CFG_BOOTMAPSZ
/*
* The blob must be within CFG_BOOTMAPSZ,
* so we flag it to be copied if it is not.
*/
if (fdt_blob >= (char *)CFG_BOOTMAPSZ)
relocate = 1;
#endif
/* move flattend device tree if needed */
if (relocate) {
int err;
ulong of_start, of_len;
of_len = *of_size;
/* position on a 4K boundary before the alloc_current */
of_start = alloc_current - of_len;
of_start &= ~(4096 - 1); /* align on page */
debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
(ulong)fdt_blob, (ulong)fdt_blob + of_len - 1,
of_len, of_len);
printf (" Loading Device Tree to %08lx, end %08lx ... ",
of_start, of_start + of_len - 1);
err = fdt_open_into (fdt_blob, (void *)of_start, of_len);
if (err != 0) {
fdt_error ("fdt move failed");
do_reset (cmdtp, flag, argc, argv);
}
puts ("OK\n");
*of_flat_tree = (char *)of_start;
new_alloc_current = of_start;
} else {
*of_flat_tree = fdt_blob;
new_alloc_current = alloc_current;
}
return new_alloc_current;
}
#endif