--- /dev/null
+/*
+ * 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>
+#include <vxworks.h>
+
+#if defined(CONFIG_WALNUT) || defined(CONFIG_SYS_VXWORKS_MAC_PTR)
+DECLARE_GLOBAL_DATA_PTR;
+#endif
+
+static unsigned long load_elf_image_phdr(unsigned long addr);
+static unsigned long load_elf_image_shdr(unsigned long addr);
+
+/* Allow ports to override the default behavior */
+__attribute__((weak))
+unsigned long do_bootelf_exec(ulong (*entry)(int, char * const[]),
+ int argc, char * const argv[])
+{
+ unsigned long ret;
+
+ /*
+ * QNX images require the data cache is disabled.
+ * Data cache is already flushed, so just turn it off.
+ */
+ int dcache = dcache_status();
+ if (dcache)
+ dcache_disable();
+
+ /*
+ * pass address parameter as argv[0] (aka command name),
+ * and all remaining args
+ */
+ ret = entry(argc, argv);
+
+ if (dcache)
+ dcache_enable();
+
+ return ret;
+}
+
+/* ======================================================================
+ * 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;
+}
+
+/* ======================================================================
+ * Interpreter command to boot an arbitrary ELF image from memory.
+ * ====================================================================== */
+int do_bootelf(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ unsigned long addr; /* Address of the ELF image */
+ unsigned long rc; /* Return value from user code */
+ char *sload, *saddr;
+
+ /* -------------------------------------------------- */
+ int rcode = 0;
+
+ sload = saddr = NULL;
+ if (argc == 3) {
+ sload = argv[1];
+ saddr = argv[2];
+ } else if (argc == 2) {
+ if (argv[1][0] == '-')
+ sload = argv[1];
+ else
+ saddr = argv[1];
+ }
+
+ if (saddr)
+ addr = simple_strtoul(saddr, NULL, 16);
+ else
+ addr = load_addr;
+
+ if (!valid_elf_image(addr))
+ return 1;
+
+ if (sload && sload[1] == 'p')
+ addr = load_elf_image_phdr(addr);
+ else
+ addr = load_elf_image_shdr(addr);
+
+ printf("## Starting application at 0x%08lx ...\n", addr);
+
+ /*
+ * pass address parameter as argv[0] (aka command name),
+ * and all remaining args
+ */
+ rc = do_bootelf_exec((void *)addr, argc - 1, 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 * const 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 */
+ char build_buf[128]; /* Buffer for building the bootline */
+
+ /* ---------------------------------------------------
+ *
+ * Check the loadaddr variable.
+ * If we don't know where the image is then we're done.
+ */
+
+ if (argc < 2)
+ addr = load_addr;
+ else
+ addr = simple_strtoul(argv[1], NULL, 16);
+
+#if defined(CONFIG_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(TFTPGET) <= 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 *) CONFIG_SYS_NVRAM_BASE_ADDR + 0x500;
+ eth_getenv_enetaddr("ethaddr", (uchar *)build_buf);
+ memcpy(tmp, &build_buf[3], 3);
+#elif defined(CONFIG_SYS_VXWORKS_MAC_PTR)
+ tmp = (char *) CONFIG_SYS_VXWORKS_MAC_PTR;
+ eth_getenv_enetaddr("ethaddr", (uchar *)build_buf);
+ memcpy(tmp, build_buf, 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
+ */
+ tmp = getenv("bootaddr");
+ if (!tmp)
+ bootaddr = CONFIG_SYS_VXWORKS_BOOT_ADDR;
+ 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
+ */
+ bootline = getenv("bootargs");
+ if (bootline) {
+ memcpy((void *) bootaddr, bootline,
+ max(strlen(bootline), 255));
+ flush_cache(bootaddr, max(strlen(bootline), 255));
+ } else {
+ sprintf(build_buf, CONFIG_SYS_VXWORKS_BOOT_DEVICE);
+ tmp = getenv("bootfile");
+ if (tmp)
+ sprintf(&build_buf[strlen(build_buf)],
+ "%s:%s ", CONFIG_SYS_VXWORKS_SERVERNAME, tmp);
+ else
+ sprintf(&build_buf[strlen(build_buf)],
+ "%s:file ", CONFIG_SYS_VXWORKS_SERVERNAME);
+
+ tmp = getenv("ipaddr");
+ if (tmp)
+ sprintf(&build_buf[strlen(build_buf)], "e=%s ", tmp);
+
+ tmp = getenv("serverip");
+ if (tmp)
+ sprintf(&build_buf[strlen(build_buf)], "h=%s ", tmp);
+
+ tmp = getenv("hostname");
+ if (tmp)
+ sprintf(&build_buf[strlen(build_buf)], "tn=%s ", tmp);
+
+#ifdef CONFIG_SYS_VXWORKS_ADD_PARAMS
+ sprintf(&build_buf[strlen(build_buf)],
+ CONFIG_SYS_VXWORKS_ADD_PARAMS);
+#endif
+
+ memcpy((void *) bootaddr, build_buf,
+ max(strlen(build_buf), 255));
+ flush_cache(bootaddr, max(strlen(build_buf), 255));
+ }
+
+ /*
+ * 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_shdr(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);
+
+ dcache_disable();
+ ((void (*)(int)) addr) (0);
+
+ puts("## vxWorks terminated\n");
+ return 1;
+}
+
+/* ======================================================================
+ * A very simple elf loader, assumes the image is valid, returns the
+ * entry point address.
+ * ====================================================================== */
+static unsigned long load_elf_image_phdr(unsigned long addr)
+{
+ Elf32_Ehdr *ehdr; /* Elf header structure pointer */
+ Elf32_Phdr *phdr; /* Program header structure pointer */
+ int i;
+
+ ehdr = (Elf32_Ehdr *) addr;
+ phdr = (Elf32_Phdr *) (addr + ehdr->e_phoff);
+
+ /* Load each program header */
+ for (i = 0; i < ehdr->e_phnum; ++i) {
+ void *dst = (void *)(uintptr_t) phdr->p_paddr;
+ void *src = (void *) addr + phdr->p_offset;
+ debug("Loading phdr %i to 0x%p (%i bytes)\n",
+ i, dst, phdr->p_filesz);
+ if (phdr->p_filesz)
+ memcpy(dst, src, phdr->p_filesz);
+ if (phdr->p_filesz != phdr->p_memsz)
+ memset(dst + phdr->p_filesz, 0x00,
+ phdr->p_memsz - phdr->p_filesz);
+ flush_cache((unsigned long)dst, phdr->p_filesz);
+ ++phdr;
+ }
+
+ return ehdr->e_entry;
+}
+
+static unsigned long load_elf_image_shdr(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) {
+ debug("%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 *)(uintptr_t) shdr->sh_addr, 0,
+ shdr->sh_size);
+ } else {
+ image = (unsigned char *) addr + shdr->sh_offset;
+ memcpy((void *)(uintptr_t) 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, 3, 0, do_bootelf,
+ "Boot from an ELF image in memory",
+ "[-p|-s] [address]\n"
+ "\t- load ELF image at [address] via program headers (-p)\n"
+ "\t or via section headers (-s)"
+);
+
+U_BOOT_CMD(
+ bootvx, 2, 0, do_bootvx,
+ "Boot vxWorks from an ELF image",
+ " [address] - load address of vxWorks ELF image."
+);
Code Review / kvmfornfv.git / blobdiff