u-boot/lib_ppc/bootm.c

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/*
* (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
*/
#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 int boot_get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
bootm_headers_t *images, char **of_flat_tree, ulong *of_size);
static int boot_relocate_fdt (struct lmb *lmb, ulong bootmap_base,
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[]);
extern ulong get_effective_memsize(void);
static ulong get_sp (void);
static void set_clocks_in_mhz (bd_t *kbd);
#ifndef CFG_LINUX_LOWMEM_MAX_SIZE
#define CFG_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
#endif
void __attribute__((noinline))
do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
bootm_headers_t *images)
{
ulong sp;
ulong initrd_start, initrd_end;
ulong rd_data_start, rd_data_end, rd_len;
ulong size;
ulong cmd_start, cmd_end, bootmap_base;
bd_t *kbd;
ulong ep = 0;
void (*kernel)(bd_t *, ulong, ulong, ulong, ulong);
int ret;
ulong of_size = 0;
struct lmb *lmb = images->lmb;
#if defined(CONFIG_OF_LIBFDT)
char *of_flat_tree = NULL;
#endif
bootmap_base = getenv_bootm_low();
size = getenv_bootm_size();
#ifdef DEBUG
if (((u64)bootmap_base + size) > (CFG_SDRAM_BASE + (u64)gd->ram_size))
puts("WARNING: bootm_low + bootm_size exceed total memory\n");
if ((bootmap_base + size) > get_effective_memsize())
puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
#endif
size = min(size, get_effective_memsize());
size = min(size, CFG_LINUX_LOWMEM_MAX_SIZE);
if (size < getenv_bootm_size()) {
ulong base = bootmap_base + size;
printf("WARNING: adjusting available memory to %x\n", size);
lmb_reserve(lmb, base, getenv_bootm_size() - size);
}
/*
* 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\n", sp);
/* adjust sp by 1K to be safe */
sp -= 1024;
lmb_reserve(lmb, sp, (CFG_SDRAM_BASE + get_effective_memsize() - sp));
#if defined(CONFIG_OF_LIBFDT)
/* find flattened device tree */
ret = boot_get_fdt (cmdtp, flag, argc, argv, images, &of_flat_tree, &of_size);
if (ret)
goto error;
#endif
if (!of_size) {
/* allocate space and init command line */
ret = boot_get_cmdline (lmb, &cmd_start, &cmd_end, bootmap_base);
if (ret) {
puts("ERROR with allocation of cmdline\n");
goto error;
}
/* allocate space for kernel copy of board info */
ret = boot_get_kbd (lmb, &kbd, bootmap_base);
if (ret) {
puts("ERROR with allocation of kernel bd\n");
goto error;
}
set_clocks_in_mhz(kbd);
}
/* find kernel entry point */
if (images->legacy_hdr_valid) {
ep = image_get_ep (&images->legacy_hdr_os_copy);
#if defined(CONFIG_FIT)
} else if (images->fit_uname_os) {
ret = fit_image_get_entry (images->fit_hdr_os,
images->fit_noffset_os, &ep);
if (ret) {
puts ("Can't get entry point property!\n");
goto error;
}
#endif
} else {
puts ("Could not find kernel entry point!\n");
goto error;
}
kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))ep;
/* find ramdisk */
ret = boot_get_ramdisk (argc, argv, images, IH_ARCH_PPC,
&rd_data_start, &rd_data_end);
if (ret)
goto error;
rd_len = rd_data_end - rd_data_start;
#if defined(CONFIG_OF_LIBFDT)
ret = boot_relocate_fdt (lmb, bootmap_base,
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) {
/* pass in dummy initrd info, we'll fix up later */
if (fdt_chosen(of_flat_tree, rd_data_start, rd_data_end, 0) < 0) {
fdt_error ("/chosen node create failed");
goto error;
}
#ifdef CONFIG_OF_BOARD_SETUP
/* Call the board-specific fixup routine */
ft_board_setup(of_flat_tree, gd->bd);
#endif
}
#endif /* CONFIG_OF_LIBFDT */
ret = boot_ramdisk_high (lmb, rd_data_start, rd_len, &initrd_start, &initrd_end);
if (ret)
goto error;
#if defined(CONFIG_OF_LIBFDT)
/* fixup the initrd now that we know where it should be */
if ((of_flat_tree) && (initrd_start && initrd_end)) {
uint64_t addr, size;
int total = fdt_num_mem_rsv(of_flat_tree);
int j;
/* Look for the dummy entry and delete it */
for (j = 0; j < total; j++) {
fdt_get_mem_rsv(of_flat_tree, j, &addr, &size);
if (addr == rd_data_start) {
fdt_del_mem_rsv(of_flat_tree, j);
break;
}
}
ret = fdt_add_mem_rsv(of_flat_tree, initrd_start,
initrd_end - initrd_start + 1);
if (ret < 0) {
printf("fdt_chosen: %s\n", fdt_strerror(ret));
goto error;
}
do_fixup_by_path_u32(of_flat_tree, "/chosen",
"linux,initrd-start", initrd_start, 0);
do_fixup_by_path_u32(of_flat_tree, "/chosen",
"linux,initrd-end", initrd_end, 0);
}
#endif
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 (!images->autostart)
return ;
#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
*/
debug (" Booting using OF flat tree...\n");
(*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);
/* does not return */
} else
#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
*/
debug (" Booting using board info...\n");
(*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
/* does not return */
}
return ;
error:
if (images->autostart)
do_reset (cmdtp, flag, argc, argv);
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 image_header_t *image_get_fdt (ulong fdt_addr)
{
image_header_t *fdt_hdr = (image_header_t *)fdt_addr;
image_print_contents (fdt_hdr);
puts (" Verifying Checksum ... ");
if (!image_check_hcrc (fdt_hdr)) {
fdt_error ("fdt header checksum invalid");
return NULL;
}
if (!image_check_dcrc (fdt_hdr)) {
fdt_error ("fdt checksum invalid");
return NULL;
}
puts ("OK\n");
if (!image_check_type (fdt_hdr, IH_TYPE_FLATDT)) {
fdt_error ("uImage is not a fdt");
return NULL;
}
if (image_get_comp (fdt_hdr) != IH_COMP_NONE) {
fdt_error ("uImage is compressed");
return NULL;
}
if (fdt_check_header ((char *)image_get_data (fdt_hdr)) != 0) {
fdt_error ("uImage data is not a fdt");
return NULL;
}
return fdt_hdr;
}
/**
* fit_check_fdt - verify FIT format FDT subimage
* @fit_hdr: pointer to the FIT header
* fdt_noffset: FDT subimage node offset within FIT image
* @verify: data CRC verification flag
*
* fit_check_fdt() verifies integrity of the FDT subimage and from
* specified FIT image.
*
* returns:
* 1, on success
* 0, on failure
*/
#if defined(CONFIG_FIT)
static int fit_check_fdt (const void *fit, int fdt_noffset, int verify)
{
fit_image_print (fit, fdt_noffset, " ");
if (verify) {
puts (" Verifying Hash Integrity ... ");
if (!fit_image_check_hashes (fit, fdt_noffset)) {
fdt_error ("Bad Data Hash");
return 0;
}
puts ("OK\n");
}
if (!fit_image_check_type (fit, fdt_noffset, IH_TYPE_FLATDT)) {
fdt_error ("Not a FDT image");
return 0;
}
if (!fit_image_check_comp (fit, fdt_noffset, IH_COMP_NONE)) {
fdt_error ("FDT image is compressed");
return 0;
}
return 1;
}
#endif /* CONFIG_FIT */
static int boot_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;
int cfg_noffset;
int fdt_noffset;
const void *data;
size_t size;
#endif
*of_flat_tree = NULL;
*of_size = 0;
if (argc > 3 || genimg_has_config (images)) {
#if defined(CONFIG_FIT)
if (argc > 3) {
/*
* 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);
}
#if defined(CONFIG_FIT)
} else {
/* use FIT configuration provided in first bootm
* command argument
*/
fdt_addr = (ulong)images->fit_hdr_os;
fit_uname_config = images->fit_uname_cfg;
debug ("* fdt: using config '%s' from image at 0x%08lx\n",
fit_uname_config, fdt_addr);
/*
* Check whether configuration has FDT blob defined,
* if not quit silently.
*/
fit_hdr = (void *)fdt_addr;
cfg_noffset = fit_conf_get_node (fit_hdr,
fit_uname_config);
if (cfg_noffset < 0) {
debug ("* fdt: no such config\n");
return 0;
}
fdt_noffset = fit_conf_get_fdt_node (fit_hdr,
cfg_noffset);
if (fdt_noffset < 0) {
debug ("* fdt: no fdt in config\n");
return 0;
}
}
#endif
debug ("## Checking for 'FDT'/'FDT Image' at %08lx\n",
fdt_addr);
/* copy from dataflash if needed */
fdt_addr = genimg_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 (genimg_get_format ((void *)fdt_addr)) {
case IMAGE_FORMAT_LEGACY:
/* verify fdt_addr points to a valid image header */
printf ("## Flattened Device Tree from Legacy Image at %08lx\n",
fdt_addr);
fdt_hdr = image_get_fdt (fdt_addr);
if (!fdt_hdr)
goto error;
/*
* move image data to the load address,
* make sure we don't overwrite initial image
*/
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");
goto error;
}
debug (" Loading FDT from 0x%08lx to 0x%08lx\n",
image_get_data (fdt_hdr), load_start);
memmove ((void *)load_start,
(void *)image_get_data (fdt_hdr),
image_get_data_size (fdt_hdr));
fdt_blob = (char *)load_start;
break;
case IMAGE_FORMAT_FIT:
/*
* This case will catch both: new uImage format
* (libfdt based) and raw FDT blob (also libfdt
* based).
*/
#if defined(CONFIG_FIT)
/* check FDT blob vs FIT blob */
if (fit_check_format ((const void *)fdt_addr)) {
/*
* FIT image
*/
fit_hdr = (void *)fdt_addr;
printf ("## Flattened Device Tree from FIT Image at %08lx\n",
fdt_addr);
if (!fit_uname_fdt) {
/*
* no FDT blob image node unit name,
* try to get config node first. If
* config unit node name is NULL
* fit_conf_get_node() will try to
* find default config node
*/
cfg_noffset = fit_conf_get_node (fit_hdr,
fit_uname_config);
if (cfg_noffset < 0) {
fdt_error ("Could not find configuration node\n");
goto error;
}
fit_uname_config = fdt_get_name (fit_hdr,
cfg_noffset, NULL);
printf (" Using '%s' configuration\n",
fit_uname_config);
fdt_noffset = fit_conf_get_fdt_node (fit_hdr,
cfg_noffset);
fit_uname_fdt = fit_get_name (fit_hdr,
fdt_noffset, NULL);
} else {
/* get FDT component image node offset */
fdt_noffset = fit_image_get_node (fit_hdr,
fit_uname_fdt);
}
if (fdt_noffset < 0) {
fdt_error ("Could not find subimage node\n");
goto error;
}
printf (" Trying '%s' FDT blob subimage\n",
fit_uname_fdt);
if (!fit_check_fdt (fit_hdr, fdt_noffset,
images->verify))
goto error;
/* get ramdisk image data address and length */
if (fit_image_get_data (fit_hdr, fdt_noffset,
&data, &size)) {
fdt_error ("Could not find FDT subimage data");
goto error;
}
/* verift that image data is a proper FDT blob */
if (fdt_check_header ((char *)data) != 0) {
fdt_error ("Subimage data is not a FTD");
goto error;
}
/*
* move image data to the load address,
* make sure we don't overwrite initial image
*/
image_start = (ulong)fit_hdr;
image_end = fit_get_end (fit_hdr);
if (fit_image_get_load (fit_hdr, fdt_noffset,
&load_start) == 0) {
load_end = load_start + size;
if ((load_start < image_end) &&
(load_end > image_start)) {
fdt_error ("FDT overwritten");
goto error;
}
printf (" Loading FDT from 0x%08lx to 0x%08lx\n",
(ulong)data, load_start);
memmove ((void *)load_start,
(void *)data, size);
fdt_blob = (char *)load_start;
} else {
fdt_blob = (char *)data;
}
images->fit_hdr_fdt = fit_hdr;
images->fit_uname_fdt = fit_uname_fdt;
images->fit_noffset_fdt = fdt_noffset;
break;
} else
#endif
{
/*
* FDT blob
*/
fdt_blob = (char *)fdt_addr;
debug ("* fdt: raw FDT blob\n");
printf ("## Flattened Device Tree blob at %08lx\n", fdt_blob);
}
break;
default:
fdt_error ("Did not find a cmdline Flattened Device Tree");
goto error;
}
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_copy, 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");
goto error;
}
if (be32_to_cpu (fdt_totalsize (fdt_blob)) != fdt_len) {
fdt_error ("fdt size != image size");
goto error;
}
} else {
fdt_error ("Did not find a Flattened Device Tree "
"in a legacy multi-component image");
goto error;
}
} else {
debug ("## No Flattened Device Tree\n");
return 0;
}
*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);
return 0;
error:
do_reset (cmdtp, flag, argc, argv);
return 1;
}
static int boot_relocate_fdt (struct lmb *lmb, ulong bootmap_base,
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 of_len = 0;
/* nothing to do */
if (*of_size == 0)
return 0;
if (fdt_check_header (fdt_blob) != 0) {
fdt_error ("image is not a fdt");
goto error;
}
#ifndef CFG_NO_FLASH
/* move the blob if it is in flash (set relocate) */
if (addr2info ((ulong)fdt_blob) != NULL)
relocate = 1;
#endif
/*
* 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;
of_len = be32_to_cpu (fdt_totalsize (fdt_blob));
/* move flattend device tree if needed */
if (relocate) {
int err;
ulong of_start;
/* position on a 4K boundary before the alloc_current */
of_start = lmb_alloc_base(lmb, of_len, 0x1000,
(CFG_BOOTMAPSZ + bootmap_base));
if (of_start == 0) {
puts("device tree - allocation error\n");
goto error;
}
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");
goto error;
}
puts ("OK\n");
*of_flat_tree = (char *)of_start;
} else {
*of_flat_tree = fdt_blob;
lmb_reserve(lmb, (ulong)fdt, of_len);
}
return 0;
error:
return 1;
}
#endif