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cmd/elf.c
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// SPDX-License-Identifier: BSD-2-Clause |
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/* * Copyright (c) 2001 William L. Pitts * All rights reserved. |
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*/ #include <common.h> #include <command.h> |
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#include <cpu_func.h> |
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#include <elf.h> |
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#include <env.h> |
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#include <image.h> |
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#include <net.h> |
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#include <vxworks.h> |
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#ifdef CONFIG_X86 |
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#include <vbe.h> |
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#include <asm/e820.h> |
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#include <linux/linkage.h> |
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#endif |
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/* |
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* A very simple ELF64 loader, assumes the image is valid, returns the |
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* entry point address. |
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* * Note if U-Boot is 32-bit, the loader assumes the to segment's * physical address and size is within the lower 32-bit address space. */ static unsigned long load_elf64_image_phdr(unsigned long addr) { Elf64_Ehdr *ehdr; /* Elf header structure pointer */ Elf64_Phdr *phdr; /* Program header structure pointer */ int i; ehdr = (Elf64_Ehdr *)addr; phdr = (Elf64_Phdr *)(addr + (ulong)ehdr->e_phoff); /* Load each program header */ for (i = 0; i < ehdr->e_phnum; ++i) { void *dst = (void *)(ulong)phdr->p_paddr; void *src = (void *)addr + phdr->p_offset; debug("Loading phdr %i to 0x%p (%lu bytes) ", i, dst, (ulong)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); |
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flush_cache(rounddown((unsigned long)dst, ARCH_DMA_MINALIGN), roundup(phdr->p_memsz, ARCH_DMA_MINALIGN)); |
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++phdr; } |
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if (ehdr->e_machine == EM_PPC64 && (ehdr->e_flags & EF_PPC64_ELFV1_ABI)) { /* * For the 64-bit PowerPC ELF V1 ABI, e_entry is a function * descriptor pointer with the first double word being the * address of the entry point of the function. */ uintptr_t addr = ehdr->e_entry; return *(Elf64_Addr *)addr; } return ehdr->e_entry; } static unsigned long load_elf64_image_shdr(unsigned long addr) { Elf64_Ehdr *ehdr; /* Elf header structure pointer */ Elf64_Shdr *shdr; /* Section header structure pointer */ unsigned char *strtab = 0; /* String table pointer */ unsigned char *image; /* Binary image pointer */ int i; /* Loop counter */ ehdr = (Elf64_Ehdr *)addr; /* Find the section header string table for output info */ shdr = (Elf64_Shdr *)(addr + (ulong)ehdr->e_shoff + (ehdr->e_shstrndx * sizeof(Elf64_Shdr))); if (shdr->sh_type == SHT_STRTAB) strtab = (unsigned char *)(addr + (ulong)shdr->sh_offset); /* Load each appropriate section */ for (i = 0; i < ehdr->e_shnum; ++i) { shdr = (Elf64_Shdr *)(addr + (ulong)ehdr->e_shoff + (i * sizeof(Elf64_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) ", (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 + (ulong)shdr->sh_offset; memcpy((void *)(uintptr_t)shdr->sh_addr, (const void *)image, shdr->sh_size); } |
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flush_cache(rounddown(shdr->sh_addr, ARCH_DMA_MINALIGN), roundup((shdr->sh_addr + shdr->sh_size), ARCH_DMA_MINALIGN) - rounddown(shdr->sh_addr, ARCH_DMA_MINALIGN)); |
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} if (ehdr->e_machine == EM_PPC64 && (ehdr->e_flags & EF_PPC64_ELFV1_ABI)) { /* * For the 64-bit PowerPC ELF V1 ABI, e_entry is a function * descriptor pointer with the first double word being the * address of the entry point of the function. */ uintptr_t addr = ehdr->e_entry; return *(Elf64_Addr *)addr; } |
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return ehdr->e_entry; } /* * A very simple ELF loader, assumes the image is valid, returns the * entry point address. * * The loader firstly reads the EFI class to see if it's a 64-bit image. * If yes, call the ELF64 loader. Otherwise continue with the ELF32 loader. |
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*/ 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; |
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if (ehdr->e_ident[EI_CLASS] == ELFCLASS64) return load_elf64_image_phdr(addr); |
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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; |
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debug("Loading phdr %i to 0x%p (%i bytes) ", 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); |
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flush_cache(rounddown((unsigned long)dst, ARCH_DMA_MINALIGN), roundup(phdr->p_memsz, ARCH_DMA_MINALIGN)); |
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++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; |
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if (ehdr->e_ident[EI_CLASS] == ELFCLASS64) return load_elf64_image_shdr(addr); |
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/* 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) ", (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); } |
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flush_cache(rounddown(shdr->sh_addr, ARCH_DMA_MINALIGN), roundup((shdr->sh_addr + shdr->sh_size), ARCH_DMA_MINALIGN) - rounddown(shdr->sh_addr, ARCH_DMA_MINALIGN)); |
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} return ehdr->e_entry; } |
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/* Allow ports to override the default behavior */ |
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static unsigned long do_bootelf_exec(ulong (*entry)(int, char * const[]), |
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int argc, char * const argv[]) |
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{ |
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unsigned long ret; |
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/* |
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* pass address parameter as argv[0] (aka command name), * and all remaining args */ |
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ret = entry(argc, argv); |
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return ret; } |
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/* |
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* Determine if a valid ELF image exists at the given memory location. |
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* First look at the ELF header magic field, then make sure that it is * executable. */ |
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int valid_elf_image(unsigned long addr) { |
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Elf32_Ehdr *ehdr; /* Elf header structure pointer */ |
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ehdr = (Elf32_Ehdr *)addr; |
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if (!IS_ELF(*ehdr)) { printf("## No elf image at address 0x%08lx ", addr); return 0; } if (ehdr->e_type != ET_EXEC) { printf("## Not a 32-bit elf image at address 0x%08lx ", addr); return 0; } |
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return 1; } |
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/* Interpreter command to boot an arbitrary ELF image from memory */ |
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int do_bootelf(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
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{ |
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unsigned long addr; /* Address of the ELF image */ unsigned long rc; /* Return value from user code */ |
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char *sload = NULL; |
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const char *ep = env_get("autostart"); |
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int rcode = 0; |
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/* Consume 'bootelf' */ argc--; argv++; |
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/* Check for flag. */ if (argc >= 1 && (argv[0][0] == '-' && \ (argv[0][1] == 'p' || argv[0][1] == 's'))) { sload = argv[0]; /* Consume flag. */ argc--; argv++; } /* Check for address. */ if (argc >= 1 && strict_strtoul(argv[0], 16, &addr) != -EINVAL) { /* Consume address */ argc--; argv++; } else |
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addr = image_load_addr; |
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if (!valid_elf_image(addr)) |
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return 1; |
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if (sload && sload[1] == 'p') addr = load_elf_image_phdr(addr); else addr = load_elf_image_shdr(addr); |
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if (ep && !strcmp(ep, "no")) return rcode; |
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printf("## Starting application at 0x%08lx ... ", addr); |
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/* * pass address parameter as argv[0] (aka command name), * and all remaining args */ |
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rc = do_bootelf_exec((void *)addr, argc, argv); |
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if (rc != 0) rcode = 1; |
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printf("## Application terminated, rc = 0x%lx ", rc); |
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return rcode; } |
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/* |
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* 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. |
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*/ |
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int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
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{ |
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unsigned long addr; /* Address of image */ |
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unsigned long bootaddr = 0; /* Address to put the bootline */ |
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char *bootline; /* Text of the bootline */ char *tmp; /* Temporary char pointer */ char build_buf[128]; /* Buffer for building the bootline */ |
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int ptr = 0; |
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#ifdef CONFIG_X86 |
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ulong base; |
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struct e820_info *info; |
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struct e820_entry *data; |
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struct efi_gop_info *gop; struct vesa_mode_info *vesa = &mode_info.vesa; |
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#endif |
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/* |
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* Check the loadaddr variable. * If we don't know where the image is then we're done. */ |
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if (argc < 2) |
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addr = image_load_addr; |
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else |
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addr = simple_strtoul(argv[1], NULL, 16); |
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#if defined(CONFIG_CMD_NET) |
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/* |
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* Check to see if we need to tftp the image ourselves * before starting |
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*/ |
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if ((argc == 2) && (strcmp(argv[1], "tftp") == 0)) { |
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if (net_loop(TFTPGET) <= 0) |
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return 1; |
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printf("Automatic boot of VxWorks image at address 0x%08lx ... ", addr); |
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} #endif |
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/* * This should equate to * NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET |
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* from the VxWorks BSP header files. * This will vary from board to board */ |
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#if defined(CONFIG_SYS_VXWORKS_MAC_PTR) |
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tmp = (char *)CONFIG_SYS_VXWORKS_MAC_PTR; |
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eth_env_get_enetaddr("ethaddr", (uchar *)build_buf); |
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memcpy(tmp, build_buf, 6); |
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#else |
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puts("## Ethernet MAC address not copied to NV RAM "); |
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#endif |
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#ifdef CONFIG_X86 /* * Get VxWorks's physical memory base address from environment, * if we don't specify it in the environment, use a default one. */ base = env_get_hex("vx_phys_mem_base", VXWORKS_PHYS_MEM_BASE); data = (struct e820_entry *)(base + E820_DATA_OFFSET); info = (struct e820_info *)(base + E820_INFO_OFFSET); memset(info, 0, sizeof(struct e820_info)); info->sign = E820_SIGNATURE; info->entries = install_e820_map(E820MAX, data); info->addr = (info->entries - 1) * sizeof(struct e820_entry) + E820_DATA_OFFSET; /* * Explicitly clear the bootloader image size otherwise if memory * at this offset happens to contain some garbage data, the final * available memory size for the kernel is insane. */ *(u32 *)(base + BOOT_IMAGE_SIZE_OFFSET) = 0; /* * Prepare compatible framebuffer information block. * The VESA mode has to be 32-bit RGBA. */ if (vesa->x_resolution && vesa->y_resolution) { gop = (struct efi_gop_info *)(base + EFI_GOP_INFO_OFFSET); gop->magic = EFI_GOP_INFO_MAGIC; gop->info.version = 0; gop->info.width = vesa->x_resolution; gop->info.height = vesa->y_resolution; gop->info.pixel_format = EFI_GOT_RGBA8; gop->info.pixels_per_scanline = vesa->bytes_per_scanline / 4; gop->fb_base = vesa->phys_base_ptr; gop->fb_size = vesa->bytes_per_scanline * vesa->y_resolution; } #endif |
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/* * Use bootaddr to find the location in memory that VxWorks |
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* will look for the bootline string. The default value is * (LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET) as defined by * VxWorks BSP. For example, on PowerPC it defaults to 0x4200. |
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*/ |
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tmp = env_get("bootaddr"); |
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if (!tmp) { |
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#ifdef CONFIG_X86 bootaddr = base + X86_BOOT_LINE_OFFSET; #else |
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printf("## VxWorks bootline address not specified "); |
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return 1; |
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#endif |
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} |
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if (!bootaddr) bootaddr = simple_strtoul(tmp, NULL, 16); |
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/* * 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 = env_get("bootargs"); if (!bootline) { tmp = env_get("bootdev"); if (tmp) { strcpy(build_buf, tmp); ptr = strlen(tmp); } else { printf("## VxWorks boot device not specified "); } tmp = env_get("bootfile"); if (tmp) ptr += sprintf(build_buf + ptr, "host:%s ", tmp); else ptr += sprintf(build_buf + ptr, "host:vxWorks "); |
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/* |
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* The following parameters are only needed if 'bootdev' * is an ethernet device, otherwise they are optional. |
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*/ |
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tmp = env_get("ipaddr"); if (tmp) { ptr += sprintf(build_buf + ptr, "e=%s", tmp); tmp = env_get("netmask"); |
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if (tmp) { |
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u32 mask = env_get_ip("netmask").s_addr; |
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ptr += sprintf(build_buf + ptr, |
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":%08x ", ntohl(mask)); } else { ptr += sprintf(build_buf + ptr, " "); |
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} |
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} |
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tmp = env_get("serverip"); if (tmp) ptr += sprintf(build_buf + ptr, "h=%s ", tmp); |
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tmp = env_get("gatewayip"); if (tmp) ptr += sprintf(build_buf + ptr, "g=%s ", tmp); |
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tmp = env_get("hostname"); if (tmp) ptr += sprintf(build_buf + ptr, "tn=%s ", tmp); |
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tmp = env_get("othbootargs"); if (tmp) { strcpy(build_buf + ptr, tmp); ptr += strlen(tmp); |
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} |
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bootline = build_buf; |
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} |
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memcpy((void *)bootaddr, bootline, max(strlen(bootline), (size_t)255)); flush_cache(bootaddr, max(strlen(bootline), (size_t)255)); printf("## Using bootline (@ 0x%lx): %s ", bootaddr, (char *)bootaddr); |
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/* * If the data at the load address is an elf image, then * treat it like an elf image. Otherwise, assume that it is a |
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* binary image. |
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*/ |
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if (valid_elf_image(addr)) |
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addr = load_elf_image_phdr(addr); |
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else |
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puts("## Not an ELF image, assuming binary "); |
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printf("## Starting vxWorks at 0x%08lx ... ", addr); |
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dcache_disable(); |
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#if defined(CONFIG_ARM64) && defined(CONFIG_ARMV8_PSCI) armv8_setup_psci(); smp_kick_all_cpus(); #endif |
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#ifdef CONFIG_X86 /* VxWorks on x86 uses stack to pass parameters */ ((asmlinkage void (*)(int))addr)(0); #else |
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((void (*)(int))addr)(0); |
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#endif |
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puts("## vxWorks terminated "); |
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return 1; } |
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U_BOOT_CMD( |
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bootelf, CONFIG_SYS_MAXARGS, 0, do_bootelf, |
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"Boot from an ELF image in memory", |
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524 525 526 527 528 |
"[-p|-s] [address] " "\t- load ELF image at [address] via program headers (-p) " "\t or via section headers (-s)" |
8bde7f776
|
529 |
); |
0d4983930
|
530 |
U_BOOT_CMD( |
ebca3df78
|
531 |
bootvx, 2, 0, do_bootvx, |
2fb2604d5
|
532 |
"Boot vxWorks from an ELF image", |
a89c33db9
|
533 |
" [address] - load address of vxWorks ELF image." |
8bde7f776
|
534 |
); |