Commit 458ded34 authored by wdenk's avatar wdenk

Initial revision

parent acea76a2
This diff is collapsed.
/*
* Copyright (c) 2001 William L. Pitts
* All rights reserved.
*
* Redistribution and use in source and binary forms are freely
* permitted provided that the above copyright notice and this
* paragraph and the following disclaimer are duplicated in all
* such forms.
*
* This software is provided "AS IS" and without any express or
* implied warranties, including, without limitation, the implied
* warranties of merchantability and fitness for a particular
* purpose.
*/
#include <common.h>
#include <command.h>
#include <linux/ctype.h>
#include <net.h>
#include <cmd_elf.h>
#include <elf.h>
#if (CONFIG_COMMANDS & CFG_CMD_ELF)
#ifndef MAX
#define MAX(a,b) ((a) > (b) ? (a) : (b))
#endif
/* ======================================================================
* Interpreter command to boot an arbitrary ELF image from memory.
* ====================================================================== */
int do_bootelf (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
unsigned long addr; /* Address of the ELF image */
unsigned long rc; /* Return value from user code */
/* -------------------------------------------------- */
int rcode = 0;
if (argc < 2)
addr = load_addr;
else
addr = simple_strtoul (argv[1], NULL, 16);
if (!valid_elf_image (addr))
return 1;
addr = load_elf_image (addr);
printf ("## Starting application at 0x%08lx ...\n", addr);
/*
* QNX images require the data cache is disabled.
* Data cache is already flushed, so just turn it off.
*/
if (dcache_status ())
dcache_disable ();
/*
* pass address parameter as argv[0] (aka command name),
* and all remaining args
*/
rc = ((ulong (*)(int, char *[])) addr) (--argc, &argv[1]);
if (rc != 0)
rcode = 1;
printf ("## Application terminated, rc = 0x%lx\n", rc);
return rcode;
}
/* ======================================================================
* Interpreter command to boot VxWorks from a memory image. The image can
* be either an ELF image or a raw binary. Will attempt to setup the
* bootline and other parameters correctly.
* ====================================================================== */
int do_bootvx ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
#if defined(CONFIG_WALNUT405) || \
defined(CONFIG_CPCI405) || \
defined(CONFIG_OCRTC) || \
defined(CONFIG_ORSG)
DECLARE_GLOBAL_DATA_PTR;
#endif
unsigned long addr; /* Address of image */
unsigned long bootaddr; /* Address to put the bootline */
char *bootline; /* Text of the bootline */
char *tmp; /* Temporary char pointer */
#if defined(CONFIG_4xx) || defined(CONFIG_IOP480)
char build_buf[80]; /* Buffer for building the bootline */
#endif
/* -------------------------------------------------- */
/*
* Check the loadaddr variable.
* If we don't know where the image is then we're done.
*/
if ((tmp = getenv ("loadaddr")) != NULL) {
addr = simple_strtoul (tmp, NULL, 16);
} else {
printf ("No load address provided\n");
return 1;
}
#if (CONFIG_COMMANDS & CFG_CMD_NET)
/* Check to see if we need to tftp the image ourselves before starting */
if ((argc == 2) && (strcmp (argv[1], "tftp") == 0)) {
if (NetLoop (TFTP) == 0)
return 1;
printf ("Automatic boot of VxWorks image at address 0x%08lx ... \n", addr);
}
#endif
/* This should equate
* to NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET
* from the VxWorks BSP header files.
* This will vary from board to board
*/
#if defined(CONFIG_WALNUT405)
tmp = (char *) CFG_NVRAM_BASE_ADDR + 0x500;
memcpy ((char *) tmp, (char *) &gd->bd->bi_enetaddr[3], 3);
#elif defined(CONFIG_CPCI405)
tmp = (char *) CFG_NVRAM_BASE_ADDR + CFG_NVRAM_VXWORKS_OFFS;
memcpy ((char *) tmp, (char *) &gd->bd->bi_enetaddr[0], 6);
#elif defined(CONFIG_OCRTC) || defined(CONFIG_ORSG)
tmp = (char *) CFG_ETHERNET_MAC_ADDR;
memcpy ((char *) tmp, (char *) &gd->bd->bi_enetaddr[0], 6);
#else
printf ("## Ethernet MAC address not copied to NV RAM\n");
#endif
/*
* Use bootaddr to find the location in memory that VxWorks
* will look for the bootline string. The default value for
* PowerPC is LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET which
* defaults to 0x4200
*/
if ((tmp = getenv ("bootaddr")) == NULL)
bootaddr = 0x4200;
else
bootaddr = simple_strtoul (tmp, NULL, 16);
/*
* Check to see if the bootline is defined in the 'bootargs'
* parameter. If it is not defined, we may be able to
* construct the info
*/
if ((bootline = getenv ("bootargs")) != NULL) {
memcpy ((void *) bootaddr, bootline, MAX(strlen(bootline), 255));
flush_cache (bootaddr, MAX(strlen(bootline), 255));
} else {
#if defined(CONFIG_4xx)
sprintf (build_buf, "ibmEmac(0,0)");
if ((tmp = getenv ("hostname")) != NULL) {
sprintf (&build_buf[strlen (build_buf - 1)],
"host:%s ", tmp);
} else {
sprintf (&build_buf[strlen (build_buf - 1)],
": ");
}
if ((tmp = getenv ("ipaddr")) != NULL) {
sprintf (&build_buf[strlen (build_buf - 1)],
"e=%s ", tmp);
}
memcpy ((void *)bootaddr, build_buf, MAX(strlen(build_buf), 255));
flush_cache (bootaddr, MAX(strlen(build_buf), 255));
#elif defined(CONFIG_IOP480)
sprintf (build_buf, "dc(0,0)");
if ((tmp = getenv ("hostname")) != NULL) {
sprintf (&build_buf[strlen (build_buf - 1)],
"host:%s ", tmp);
} else {
sprintf (&build_buf[strlen (build_buf - 1)],
": ");
}
if ((tmp = getenv ("ipaddr")) != NULL) {
sprintf (&build_buf[strlen (build_buf - 1)],
"e=%s ", tmp);
}
memcpy ((void *) bootaddr, build_buf, MAX(strlen(build_buf), 255));
flush_cache (bootaddr, MAX(strlen(build_buf), 255));
#else
/*
* I'm not sure what the device should be for other
* PPC flavors, the hostname and ipaddr should be ok
* to just copy
*/
printf ("No bootargs defined\n");
return 1;
#endif
}
/*
* If the data at the load address is an elf image, then
* treat it like an elf image. Otherwise, assume that it is a
* binary image
*/
if (valid_elf_image (addr)) {
addr = load_elf_image (addr);
} else {
printf ("## Not an ELF image, assuming binary\n");
/* leave addr as load_addr */
}
printf ("## Using bootline (@ 0x%lx): %s\n", bootaddr,
(char *) bootaddr);
printf ("## Starting vxWorks at 0x%08lx ...\n", addr);
((void (*)(void)) addr) ();
printf ("## vxWorks terminated\n");
return 1;
}
/* ======================================================================
* Determine if a valid ELF image exists at the given memory location.
* First looks at the ELF header magic field, the makes sure that it is
* executable and makes sure that it is for a PowerPC.
* ====================================================================== */
int valid_elf_image (unsigned long addr)
{
Elf32_Ehdr *ehdr; /* Elf header structure pointer */
/* -------------------------------------------------- */
ehdr = (Elf32_Ehdr *) addr;
if (!IS_ELF (*ehdr)) {
printf ("## No elf image at address 0x%08lx\n", addr);
return 0;
}
if (ehdr->e_type != ET_EXEC) {
printf ("## Not a 32-bit elf image at address 0x%08lx\n",
addr);
return 0;
}
if (ehdr->e_machine != EM_PPC) {
printf ("## Not a PowerPC elf image at address 0x%08lx\n",
addr);
return 0;
}
return 1;
}
/* ======================================================================
* A very simple elf loader, assumes the image is valid, returns the
* entry point address.
* ====================================================================== */
unsigned long load_elf_image (unsigned long addr)
{
Elf32_Ehdr *ehdr; /* Elf header structure pointer */
Elf32_Shdr *shdr; /* Section header structure pointer */
unsigned char *strtab = 0; /* String table pointer */
unsigned char *image; /* Binary image pointer */
int i; /* Loop counter */
/* -------------------------------------------------- */
ehdr = (Elf32_Ehdr *) addr;
/* Find the section header string table for output info */
shdr = (Elf32_Shdr *) (addr + ehdr->e_shoff +
(ehdr->e_shstrndx * sizeof (Elf32_Shdr)));
if (shdr->sh_type == SHT_STRTAB)
strtab = (unsigned char *) (addr + shdr->sh_offset);
/* Load each appropriate section */
for (i = 0; i < ehdr->e_shnum; ++i) {
shdr = (Elf32_Shdr *) (addr + ehdr->e_shoff +
(i * sizeof (Elf32_Shdr)));
if (!(shdr->sh_flags & SHF_ALLOC)
|| shdr->sh_addr == 0 || shdr->sh_size == 0) {
continue;
}
if (strtab) {
printf ("%sing %s @ 0x%08lx (%ld bytes)\n",
(shdr->sh_type == SHT_NOBITS) ?
"Clear" : "Load",
&strtab[shdr->sh_name],
(unsigned long) shdr->sh_addr,
(long) shdr->sh_size);
}
if (shdr->sh_type == SHT_NOBITS) {
memset ((void *)shdr->sh_addr, 0, shdr->sh_size);
} else {
image = (unsigned char *) addr + shdr->sh_offset;
memcpy ((void *) shdr->sh_addr,
(const void *) image,
shdr->sh_size);
}
flush_cache (shdr->sh_addr, shdr->sh_size);
}
return ehdr->e_entry;
}
/* ====================================================================== */
#endif /* CFG_CMD_ELF */
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