#include <common.h>
#include <command.h>
#include <watchdog.h>
#include <image.h>
#include <environment.h>
#include <asm/global_data.h>
#include <asm/bitops.h>
#ifdef CONFIG_OF_FLAT_TREE
#include <ft_build.h>
#endif
extern bd_t *bd;
#define SHOW_BOOT_PROGRESS(x)
void __attribute__((noinline))
do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
int argc, char *argv[],
ulong addr,
ulong *len_ptr,
int verify)
{
ulong sp;
ulong len, checksum;
ulong initrd_start, initrd_end;
ulong cmd_start, cmd_end;
ulong initrd_high;
ulong data;
int initrd_copy_to_ram = 1;
char *cmdline;
char *s;
bd_t *kbd;
void (*kernel)(bd_t *, ulong, ulong, ulong, ulong);
image_header_t *hdr = &header;
#ifdef CONFIG_OF_FLAT_TREE
char *of_flat_tree = NULL;
ulong of_data = 0;
#endif
if ((s = getenv ("initrd_high")) != NULL) {
/* a value of "no" or a similar string will act like 0,
* turning the "load high" feature off. This is intentional.
*/
initrd_high = simple_strtoul(s, NULL, 16);
if (initrd_high == ~0)
initrd_copy_to_ram = 0;
} else { /* not set, no restrictions to load high */
initrd_high = ~0;
}
#ifdef CONFIG_LOGBUFFER
kbd=gd->bd;
/* Prevent initrd from overwriting logbuffer */
if (initrd_high < (kbd->bi_memsize-LOGBUFF_LEN-LOGBUFF_OVERHEAD))
initrd_high = kbd->bi_memsize-LOGBUFF_LEN-LOGBUFF_OVERHEAD;
debug ("## Logbuffer at 0x%08lX ", kbd->bi_memsize-LOGBUFF_LEN);
#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.
*/
asm( "mr %0,1": "=r"(sp) : );
debug ("## Current stack ends at 0x%08lX ", sp);
sp -= 2048; /* just to be sure */
if (sp > CFG_BOOTMAPSZ)
sp = CFG_BOOTMAPSZ;
sp &= ~0xF;
debug ("=> set upper limit to 0x%08lX\n", sp);
cmdline = (char *)((sp - CONFIG_CBSIZE) & ~0xF);
kbd = (bd_t *)(((ulong)cmdline - sizeof(bd_t)) & ~0xF);
if ((s = getenv("bootargs")) == NULL)
s = "";
strcpy (cmdline, s);
cmd_start = (ulong)&cmdline[0];
cmd_end = cmd_start + strlen(cmdline);
*kbd = *(bd);
#ifdef DEBUG
printf ("## cmdline at 0x%08lX ... 0x%08lX\n", cmd_start, cmd_end);
do_bdinfo (NULL, 0, 0, NULL);
#endif
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 */
}
kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong)) ntohl(hdr->ih_ep);
/*
* Check if there is an initrd image
*/
#ifdef CONFIG_OF_FLAT_TREE
/* Look for a '-' which indicates to ignore the ramdisk argument */
if (argc >= 3 && strcmp(argv[2], "-") == 0) {
debug ("Skipping initrd\n");
len = data = 0;
}
else
#endif
if (argc >= 3) {
debug ("Not skipping initrd\n");
SHOW_BOOT_PROGRESS (9);
addr = simple_strtoul(argv[2], NULL, 16);
printf ("## Loading RAMDisk Image at %08lx ...\n", addr);
/* Copy header so we can blank CRC field for re-calculation */
memmove (&header, (char *)addr, sizeof(image_header_t));
if (ntohl(hdr->ih_magic) != IH_MAGIC) {
puts ("Bad Magic Number\n");
SHOW_BOOT_PROGRESS (-10);
do_reset ();
}
data = (ulong)&header;
len = sizeof(image_header_t);
checksum = ntohl(hdr->ih_hcrc);
hdr->ih_hcrc = 0;
if (crc32 (0, (uchar *)data, len) != checksum) {
puts ("Bad Header Checksum\n");
SHOW_BOOT_PROGRESS (-11);
do_reset();
}
SHOW_BOOT_PROGRESS (10);
print_image_hdr (hdr);
data = addr + sizeof(image_header_t);
len = ntohl(hdr->ih_size);
if (verify) {
ulong csum = 0;
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
ulong cdata = data, edata = cdata + len;
#endif /* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */
puts (" Verifying Checksum ... ");
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
while (cdata < edata) {
ulong chunk = edata - cdata;
if (chunk > CHUNKSZ)
chunk = CHUNKSZ;
csum = crc32 (csum, (uchar *)cdata, chunk);
cdata += chunk;
WATCHDOG_RESET();
}
#else /* !(CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG) */
csum = crc32 (0, (uchar *)data, len);
#endif /* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */
if (csum != ntohl(hdr->ih_dcrc)) {
puts ("Bad Data CRC\n");
SHOW_BOOT_PROGRESS (-12);
do_reset ();
}
puts ("OK\n");
}
SHOW_BOOT_PROGRESS (11);
if ((hdr->ih_os != IH_OS_LINUX) ||
(hdr->ih_arch != IH_CPU_PPC) ||
(hdr->ih_type != IH_TYPE_RAMDISK) ) {
puts ("No Linux PPC Ramdisk Image\n");
SHOW_BOOT_PROGRESS (-13);
do_reset ();
}
/*
* Now check if we have a multifile image
*/
} else if ((hdr->ih_type==IH_TYPE_MULTI) && (len_ptr[1])) {
u_long tail = ntohl(len_ptr[0]) % 4;
int i;
SHOW_BOOT_PROGRESS (13);
/* skip kernel length and terminator */
data = (ulong)(&len_ptr[2]);
/* skip any additional image length fields */
for (i=1; len_ptr[i]; ++i)
data += 4;
/* add kernel length, and align */
data += ntohl(len_ptr[0]);
if (tail) {
data += 4 - tail;
}
len = ntohl(len_ptr[1]);
} else {
/*
* no initrd image
*/
SHOW_BOOT_PROGRESS (14);
len = data = 0;
}
#ifdef CONFIG_OF_FLAT_TREE
if(argc > 3) {
of_flat_tree = (char *) simple_strtoul(argv[3], NULL, 16);
hdr = (image_header_t *)of_flat_tree;
if (*(ulong *)of_flat_tree == OF_DT_HEADER) {
#ifdef CONFIG_OF_FLAT_TREE_FLASH /* FIXME */
if (addr2info((ulong)of_flat_tree) != NULL)
of_data = (ulong)of_flat_tree;
#endif
} else if (ntohl(hdr->ih_magic) == IH_MAGIC) {
printf("## Flat Device Tree Image at %08lX\n", hdr);
print_image_hdr(hdr);
if ((ntohl(hdr->ih_load) < ((unsigned long)hdr + ntohl(hdr->ih_size) + sizeof(hdr))) &&
((ntohl(hdr->ih_load) + ntohl(hdr->ih_size)) > (unsigned long)hdr)) {
printf ("ERROR: Load address overwrites Flat Device Tree uImage\n");
return;
}
printf(" Verifying Checksum ... ");
memmove (&header, (char *)hdr, sizeof(image_header_t));
checksum = ntohl(header.ih_hcrc);
header.ih_hcrc = 0;
if(checksum != crc32(0, (uchar *)&header, sizeof(image_header_t))) {
printf("ERROR: Flat Device Tree header checksum is invalid\n");
return;
}
checksum = ntohl(hdr->ih_dcrc);
addr = (ulong)((uchar *)(hdr) + sizeof(image_header_t));
len = ntohl(hdr->ih_size);
if(checksum != crc32(0, (uchar *)addr, len)) {
printf("ERROR: Flat Device Tree checksum is invalid\n");
return;
}
printf("OK\n");
if (ntohl(hdr->ih_type) != IH_TYPE_FLATDT) {
printf ("ERROR: uImage not Flat Device Tree type\n");
return;
}
if (ntohl(hdr->ih_comp) != IH_COMP_NONE) {
printf("ERROR: uImage is not uncompressed\n");
return;
}
if (*((ulong *)(of_flat_tree + sizeof(image_header_t))) != OF_DT_HEADER) {
printf ("ERROR: uImage data is not a flat device tree\n");
return;
}
memmove((void *)ntohl(hdr->ih_load),
(void *)(of_flat_tree + sizeof(image_header_t)),
ntohl(hdr->ih_size));
of_flat_tree = (char *)ntohl(hdr->ih_load);
} else {
printf ("Did not find a flat flat device tree at address %08lX\n", of_flat_tree);
return;
}
printf (" Booting using flat device tree at 0x%x\n",
of_flat_tree);
} else if ((hdr->ih_type==IH_TYPE_MULTI) && (len_ptr[1]) && (len_ptr[2])) {
u_long tail = ntohl(len_ptr[0]) % 4;
int i;
/* skip kernel length, initrd length, and terminator */
of_data = (ulong)(&len_ptr[3]);
/* skip any additional image length fields */
for (i=2; len_ptr[i]; ++i)
of_data += 4;
/* add kernel length, and align */
of_data += ntohl(len_ptr[0]);
if (tail) {
of_data += 4 - tail;
}
/* add initrd length, and align */
tail = ntohl(len_ptr[1]) % 4;
of_data += ntohl(len_ptr[1]);
if (tail) {
of_data += 4 - tail;
}
if (((struct boot_param_header *)of_data)->magic != OF_DT_HEADER) {
printf ("ERROR: image is not a flat device tree\n");
return;
}
if (((struct boot_param_header *)of_data)->totalsize != ntohl(len_ptr[2])) {
printf ("ERROR: flat device tree size does not agree with image\n");
return;
}
}
#endif
if (!data) {
debug ("No initrd\n");
}
if (data) {
if (!initrd_copy_to_ram) { /* zero-copy ramdisk support */
initrd_start = data;
initrd_end = initrd_start + len;
} else {
initrd_start = (ulong)kbd - len;
initrd_start &= ~(4096 - 1); /* align on page */
if (initrd_high) {
ulong nsp;
/*
* the inital ramdisk does not need to be within
* CFG_BOOTMAPSZ as it is not accessed until after
* the mm system is initialised.
*
* do the stack bottom calculation again and see if
* the initrd will fit just below the monitor stack
* bottom without overwriting the area allocated
* above for command line args and board info.
*/
asm( "mr %0,1": "=r"(nsp) : );
nsp -= 2048; /* just to be sure */
nsp &= ~0xF;
if (nsp > initrd_high) /* limit as specified */
nsp = initrd_high;
nsp -= len;
nsp &= ~(4096 - 1); /* align on page */
if (nsp >= sp)
initrd_start = nsp;
}
SHOW_BOOT_PROGRESS (12);
debug ("## initrd at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
data, data + len - 1, len, len);
initrd_end = initrd_start + len;
printf (" Loading Ramdisk to %08lx, end %08lx ... ",
initrd_start, initrd_end);
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
{
size_t l = len;
void *to = (void *)initrd_start;
void *from = (void *)data;
while (l > 0) {
size_t tail = (l > CHUNKSZ) ? CHUNKSZ : l;
WATCHDOG_RESET();
memmove (to, from, tail);
to += tail;
from += tail;
l -= tail;
}
}
#else /* !(CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG) */
memmove ((void *)initrd_start, (void *)data, len);
#endif /* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */
puts ("OK\n");
}
} else {
initrd_start = 0;
initrd_end = 0;
}
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
#ifdef CONFIG_OF_FLAT_TREE
/* move of_flat_tree if needed */
if (of_data) {
ulong of_start, of_len;
of_len = ((struct boot_param_header *)of_data)->totalsize;
/* provide extra 8k pad */
if (initrd_start)
of_start = initrd_start - of_len - 8192;
else
of_start = (ulong)kbd - of_len - 8192;
of_start &= ~(4096 - 1); /* align on page */
debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
of_data, of_data + of_len - 1, of_len, of_len);
of_flat_tree = (char *)of_start;
printf (" Loading Device Tree to %08lx, end %08lx ... ",
of_start, of_start + of_len - 1);
memmove ((void *)of_start, (void *)of_data, of_len);
}
#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
*/
#ifdef CONFIG_OF_FLAT_TREE
if (!of_flat_tree) /* no device tree; boot old style */
#endif
(*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
/* does not return */
#ifdef CONFIG_OF_FLAT_TREE
/*
* Linux Kernel Parameters (passing device tree):
* r3: ptr to OF flat tree, followed by the board info data
* r4: physical pointer to the kernel itself
* r5: NULL
* r6: NULL
* r7: NULL
*/
ft_setup(of_flat_tree, kbd, initrd_start, initrd_end);
/* ft_dump_blob(of_flat_tree); */
(*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);
#endif
}
