| /* |
| * 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 <elf.h> |
| |
| #if defined(CONFIG_WALNUT) || defined(CFG_VXWORKS_MAC_PTR) |
| DECLARE_GLOBAL_DATA_PTR; |
| #endif |
| |
| #if (CONFIG_COMMANDS & CFG_CMD_ELF) |
| |
| #ifndef MAX |
| #define MAX(a,b) ((a) > (b) ? (a) : (b)) |
| #endif |
| |
| int valid_elf_image (unsigned long addr); |
| unsigned long load_elf_image (unsigned long addr); |
| |
| /* ====================================================================== |
| * 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); |
| #if 0 |
| /* |
| * QNX images require the data cache is disabled. |
| * Data cache is already flushed, so just turn it off. |
| */ |
| if (dcache_status ()) |
| dcache_disable (); |
| #endif |
| |
| /* |
| * 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[]) |
| { |
| 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 { |
| addr = 0x81400000; |
| printf("No load address provided, looking @ %x\n", addr); |
| } |
| |
| #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_WALNUT) |
| tmp = (char *) CFG_NVRAM_BASE_ADDR + 0x500; |
| memcpy ((char *) tmp, (char *) &gd->bd->bi_enetaddr[3], 3); |
| #elif defined(CFG_VXWORKS_MAC_PTR) |
| tmp = (char *) CFG_VXWORKS_MAC_PTR; |
| memcpy ((char *) tmp, (char *) &gd->bd->bi_enetaddr[0], 6); |
| #else |
| puts ("## 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 = 0x80800700; /*Default value for C1xx devices */ |
| 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 |
| */ |
| |
| puts ("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 { |
| puts ("## 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) (); |
| |
| puts ("## 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 0 |
| if (ehdr->e_machine != EM_PPC) { |
| printf ("## Not a PowerPC elf image at address 0x%08lx\n", |
| addr); |
| return 0; |
| } |
| #endif |
| |
| 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; |
| } |
| |
| /* ====================================================================== */ |
| U_BOOT_CMD( |
| bootelf, 2, 0, do_bootelf, |
| "bootelf - Boot from an ELF image in memory\n", |
| " [address] - load address of ELF image.\n" |
| ); |
| |
| U_BOOT_CMD( |
| bootvx, 2, 0, do_bootvx, |
| "bootvx - Boot vxWorks from an ELF image\n", |
| " [address] - load address of vxWorks ELF image.\n" |
| ); |
| |
| #endif /* CFG_CMD_ELF */ |