GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)
This commit is contained in:
@@ -0,0 +1,544 @@
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/*
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* Copyright (c) 2001 William L. Pitts
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are freely
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* permitted provided that the above copyright notice and this
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* paragraph and the following disclaimer are duplicated in all
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* such forms.
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*
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* This software is provided "AS IS" and without any express or
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* implied warranties, including, without limitation, the implied
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* warranties of merchantability and fitness for a particular
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* purpose.
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*/
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#include <common.h>
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#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 <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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*
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* Note if U-Boot is 32-bit, the loader assumes the to segment's
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* physical address and size is within the lower 32-bit address space.
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*/
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static unsigned long load_elf64_image_phdr(unsigned long addr)
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{
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Elf64_Ehdr *ehdr; /* Elf header structure pointer */
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Elf64_Phdr *phdr; /* Program header structure pointer */
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int i;
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ehdr = (Elf64_Ehdr *)addr;
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phdr = (Elf64_Phdr *)(addr + (ulong)ehdr->e_phoff);
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/* Load each program header */
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for (i = 0; i < ehdr->e_phnum; ++i) {
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void *dst = (void *)(ulong)phdr->p_paddr;
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void *src = (void *)addr + phdr->p_offset;
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debug("Loading phdr %i to 0x%p (%lu bytes)\n",
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i, dst, (ulong)phdr->p_filesz);
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if (phdr->p_filesz)
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memcpy(dst, src, phdr->p_filesz);
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if (phdr->p_filesz != phdr->p_memsz)
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memset(dst + phdr->p_filesz, 0x00,
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phdr->p_memsz - phdr->p_filesz);
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flush_cache(rounddown((unsigned long)dst, ARCH_DMA_MINALIGN),
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roundup(phdr->p_memsz, ARCH_DMA_MINALIGN));
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++phdr;
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}
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if (ehdr->e_machine == EM_PPC64 && (ehdr->e_flags &
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EF_PPC64_ELFV1_ABI)) {
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/*
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* For the 64-bit PowerPC ELF V1 ABI, e_entry is a function
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* descriptor pointer with the first double word being the
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* address of the entry point of the function.
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*/
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uintptr_t addr = ehdr->e_entry;
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return *(Elf64_Addr *)addr;
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}
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return ehdr->e_entry;
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}
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static unsigned long load_elf64_image_shdr(unsigned long addr)
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{
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Elf64_Ehdr *ehdr; /* Elf header structure pointer */
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Elf64_Shdr *shdr; /* Section header structure pointer */
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unsigned char *strtab = 0; /* String table pointer */
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unsigned char *image; /* Binary image pointer */
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int i; /* Loop counter */
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ehdr = (Elf64_Ehdr *)addr;
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/* Find the section header string table for output info */
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shdr = (Elf64_Shdr *)(addr + (ulong)ehdr->e_shoff +
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(ehdr->e_shstrndx * sizeof(Elf64_Shdr)));
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if (shdr->sh_type == SHT_STRTAB)
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strtab = (unsigned char *)(addr + (ulong)shdr->sh_offset);
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/* Load each appropriate section */
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for (i = 0; i < ehdr->e_shnum; ++i) {
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shdr = (Elf64_Shdr *)(addr + (ulong)ehdr->e_shoff +
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(i * sizeof(Elf64_Shdr)));
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if (!(shdr->sh_flags & SHF_ALLOC) ||
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shdr->sh_addr == 0 || shdr->sh_size == 0) {
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continue;
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}
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if (strtab) {
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debug("%sing %s @ 0x%08lx (%ld bytes)\n",
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(shdr->sh_type == SHT_NOBITS) ? "Clear" : "Load",
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&strtab[shdr->sh_name],
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(unsigned long)shdr->sh_addr,
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(long)shdr->sh_size);
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}
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if (shdr->sh_type == SHT_NOBITS) {
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memset((void *)(uintptr_t)shdr->sh_addr, 0,
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shdr->sh_size);
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} else {
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image = (unsigned char *)addr + (ulong)shdr->sh_offset;
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memcpy((void *)(uintptr_t)shdr->sh_addr,
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(const void *)image, shdr->sh_size);
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}
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flush_cache(rounddown(shdr->sh_addr, ARCH_DMA_MINALIGN),
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roundup((shdr->sh_addr + shdr->sh_size),
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ARCH_DMA_MINALIGN) -
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rounddown(shdr->sh_addr, ARCH_DMA_MINALIGN));
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}
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if (ehdr->e_machine == EM_PPC64 && (ehdr->e_flags &
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EF_PPC64_ELFV1_ABI)) {
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/*
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* For the 64-bit PowerPC ELF V1 ABI, e_entry is a function
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* descriptor pointer with the first double word being the
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* address of the entry point of the function.
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*/
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uintptr_t addr = ehdr->e_entry;
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return *(Elf64_Addr *)addr;
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}
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return ehdr->e_entry;
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}
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/*
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* A very simple ELF loader, assumes the image is valid, returns the
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* entry point address.
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*
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* The loader firstly reads the EFI class to see if it's a 64-bit image.
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* If yes, call the ELF64 loader. Otherwise continue with the ELF32 loader.
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*/
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static unsigned long load_elf_image_phdr(unsigned long addr)
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{
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Elf32_Ehdr *ehdr; /* Elf header structure pointer */
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Elf32_Phdr *phdr; /* Program header structure pointer */
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int i;
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ehdr = (Elf32_Ehdr *)addr;
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if (ehdr->e_ident[EI_CLASS] == ELFCLASS64)
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return load_elf64_image_phdr(addr);
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phdr = (Elf32_Phdr *)(addr + ehdr->e_phoff);
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/* Load each program header */
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for (i = 0; i < ehdr->e_phnum; ++i) {
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void *dst = (void *)(uintptr_t)phdr->p_paddr;
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void *src = (void *)addr + phdr->p_offset;
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debug("Loading phdr %i to 0x%p (%i bytes)\n",
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i, dst, phdr->p_filesz);
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if (phdr->p_filesz)
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memcpy(dst, src, phdr->p_filesz);
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if (phdr->p_filesz != phdr->p_memsz)
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memset(dst + phdr->p_filesz, 0x00,
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phdr->p_memsz - phdr->p_filesz);
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flush_cache(rounddown((unsigned long)dst, ARCH_DMA_MINALIGN),
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roundup(phdr->p_memsz, ARCH_DMA_MINALIGN));
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++phdr;
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}
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return ehdr->e_entry;
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}
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static unsigned long load_elf_image_shdr(unsigned long addr)
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{
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Elf32_Ehdr *ehdr; /* Elf header structure pointer */
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Elf32_Shdr *shdr; /* Section header structure pointer */
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unsigned char *strtab = 0; /* String table pointer */
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unsigned char *image; /* Binary image pointer */
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int i; /* Loop counter */
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ehdr = (Elf32_Ehdr *)addr;
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if (ehdr->e_ident[EI_CLASS] == ELFCLASS64)
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return load_elf64_image_shdr(addr);
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/* Find the section header string table for output info */
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shdr = (Elf32_Shdr *)(addr + ehdr->e_shoff +
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(ehdr->e_shstrndx * sizeof(Elf32_Shdr)));
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if (shdr->sh_type == SHT_STRTAB)
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strtab = (unsigned char *)(addr + shdr->sh_offset);
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/* Load each appropriate section */
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for (i = 0; i < ehdr->e_shnum; ++i) {
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shdr = (Elf32_Shdr *)(addr + ehdr->e_shoff +
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(i * sizeof(Elf32_Shdr)));
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if (!(shdr->sh_flags & SHF_ALLOC) ||
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shdr->sh_addr == 0 || shdr->sh_size == 0) {
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continue;
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}
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if (strtab) {
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debug("%sing %s @ 0x%08lx (%ld bytes)\n",
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(shdr->sh_type == SHT_NOBITS) ? "Clear" : "Load",
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&strtab[shdr->sh_name],
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(unsigned long)shdr->sh_addr,
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(long)shdr->sh_size);
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}
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if (shdr->sh_type == SHT_NOBITS) {
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memset((void *)(uintptr_t)shdr->sh_addr, 0,
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shdr->sh_size);
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} else {
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image = (unsigned char *)addr + shdr->sh_offset;
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memcpy((void *)(uintptr_t)shdr->sh_addr,
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(const void *)image, shdr->sh_size);
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}
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flush_cache(rounddown(shdr->sh_addr, ARCH_DMA_MINALIGN),
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roundup((shdr->sh_addr + shdr->sh_size),
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ARCH_DMA_MINALIGN) -
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rounddown(shdr->sh_addr, ARCH_DMA_MINALIGN));
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}
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return ehdr->e_entry;
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}
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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),
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* and all remaining args
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*/
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ret = entry(argc, argv);
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return ret;
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}
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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
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* executable.
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*/
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int valid_elf_image(unsigned long addr)
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{
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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)) {
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printf("## No elf image at address 0x%08lx\n", addr);
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return 0;
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}
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if (ehdr->e_type != ET_EXEC) {
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printf("## Not a 32-bit elf image at address 0x%08lx\n", addr);
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return 0;
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}
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return 1;
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}
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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 */
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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' */
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argc--; argv++;
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/* Check for flag. */
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if (argc >= 1 && (argv[0][0] == '-' && \
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(argv[0][1] == 'p' || argv[0][1] == 's'))) {
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sload = argv[0];
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/* Consume flag. */
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argc--; argv++;
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}
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/* Check for address. */
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if (argc >= 1 && strict_strtoul(argv[0], 16, &addr) != -EINVAL) {
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/* Consume address */
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argc--; argv++;
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} else
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addr = 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')
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addr = load_elf_image_phdr(addr);
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else
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addr = load_elf_image_shdr(addr);
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if (ep && !strcmp(ep, "no"))
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return rcode;
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printf("## Starting application at 0x%08lx ...\n", addr);
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/*
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* pass address parameter as argv[0] (aka command name),
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* and all remaining args
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*/
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rc = do_bootelf_exec((void *)addr, argc, argv);
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if (rc != 0)
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rcode = 1;
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printf("## Application terminated, rc = 0x%lx\n", rc);
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return rcode;
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}
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/*
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* Interpreter command to boot VxWorks from a memory image. The image can
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* be either an ELF image or a raw binary. Will attempt to setup the
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* 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 */
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char *tmp; /* Temporary char pointer */
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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;
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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.
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* If we don't know where the image is then we're done.
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*/
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if (argc < 2)
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addr = 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
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* 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 ...\n",
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addr);
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}
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#endif
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/*
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* This should equate to
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* NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET
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* from the VxWorks BSP header files.
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* This will vary from board to board
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*/
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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\n");
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#endif
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#ifdef CONFIG_X86
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/*
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* Get VxWorks's physical memory base address from environment,
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* if we don't specify it in the environment, use a default one.
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*/
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base = env_get_hex("vx_phys_mem_base", VXWORKS_PHYS_MEM_BASE);
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data = (struct e820_entry *)(base + E820_DATA_OFFSET);
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info = (struct e820_info *)(base + E820_INFO_OFFSET);
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memset(info, 0, sizeof(struct e820_info));
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info->sign = E820_SIGNATURE;
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info->entries = install_e820_map(E820MAX, data);
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info->addr = (info->entries - 1) * sizeof(struct e820_entry) +
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E820_DATA_OFFSET;
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/*
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* Explicitly clear the bootloader image size otherwise if memory
|
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* at this offset happens to contain some garbage data, the final
|
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* available memory size for the kernel is insane.
|
||||
*/
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*(u32 *)(base + BOOT_IMAGE_SIZE_OFFSET) = 0;
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/*
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* Prepare compatible framebuffer information block.
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* The VESA mode has to be 32-bit RGBA.
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*/
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if (vesa->x_resolution && vesa->y_resolution) {
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gop = (struct efi_gop_info *)(base + EFI_GOP_INFO_OFFSET);
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gop->magic = EFI_GOP_INFO_MAGIC;
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gop->info.version = 0;
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gop->info.width = vesa->x_resolution;
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gop->info.height = vesa->y_resolution;
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gop->info.pixel_format = EFI_GOT_RGBA8;
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gop->info.pixels_per_scanline = vesa->bytes_per_scanline / 4;
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gop->fb_base = vesa->phys_base_ptr;
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gop->fb_size = vesa->bytes_per_scanline * vesa->y_resolution;
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}
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#endif
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||||
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/*
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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
|
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* (LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET) as defined by
|
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* VxWorks BSP. For example, on PowerPC it defaults to 0x4200.
|
||||
*/
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tmp = env_get("bootaddr");
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if (!tmp) {
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#ifdef CONFIG_X86
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bootaddr = base + X86_BOOT_LINE_OFFSET;
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#else
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printf("## VxWorks bootline address not specified\n");
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return 1;
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||||
#endif
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||||
}
|
||||
|
||||
if (!bootaddr)
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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 = 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\n");
|
||||
}
|
||||
|
||||
tmp = env_get("bootfile");
|
||||
if (tmp)
|
||||
ptr += sprintf(build_buf + ptr, "host:%s ", tmp);
|
||||
else
|
||||
ptr += sprintf(build_buf + ptr, "host:vxWorks ");
|
||||
|
||||
/*
|
||||
* The following parameters are only needed if 'bootdev'
|
||||
* is an ethernet device, otherwise they are optional.
|
||||
*/
|
||||
tmp = env_get("ipaddr");
|
||||
if (tmp) {
|
||||
ptr += sprintf(build_buf + ptr, "e=%s", tmp);
|
||||
tmp = env_get("netmask");
|
||||
if (tmp) {
|
||||
u32 mask = env_get_ip("netmask").s_addr;
|
||||
ptr += sprintf(build_buf + ptr,
|
||||
":%08x ", ntohl(mask));
|
||||
} else {
|
||||
ptr += sprintf(build_buf + ptr, " ");
|
||||
}
|
||||
}
|
||||
|
||||
tmp = env_get("serverip");
|
||||
if (tmp)
|
||||
ptr += sprintf(build_buf + ptr, "h=%s ", tmp);
|
||||
|
||||
tmp = env_get("gatewayip");
|
||||
if (tmp)
|
||||
ptr += sprintf(build_buf + ptr, "g=%s ", tmp);
|
||||
|
||||
tmp = env_get("hostname");
|
||||
if (tmp)
|
||||
ptr += sprintf(build_buf + ptr, "tn=%s ", tmp);
|
||||
|
||||
tmp = env_get("othbootargs");
|
||||
if (tmp) {
|
||||
strcpy(build_buf + ptr, tmp);
|
||||
ptr += strlen(tmp);
|
||||
}
|
||||
|
||||
bootline = build_buf;
|
||||
}
|
||||
|
||||
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\n", bootaddr, (char *)bootaddr);
|
||||
|
||||
/*
|
||||
* 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_phdr(addr);
|
||||
else
|
||||
puts("## Not an ELF image, assuming binary\n");
|
||||
|
||||
printf("## Starting vxWorks at 0x%08lx ...\n", addr);
|
||||
|
||||
dcache_disable();
|
||||
#if defined(CONFIG_ARM64) && defined(CONFIG_ARMV8_PSCI)
|
||||
armv8_setup_psci();
|
||||
smp_kick_all_cpus();
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_X86
|
||||
/* VxWorks on x86 uses stack to pass parameters */
|
||||
((asmlinkage void (*)(int))addr)(0);
|
||||
#else
|
||||
((void (*)(int))addr)(0);
|
||||
#endif
|
||||
|
||||
puts("## vxWorks terminated\n");
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
U_BOOT_CMD(
|
||||
bootelf, CONFIG_SYS_MAXARGS, 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."
|
||||
);
|
||||
Reference in New Issue
Block a user