mirror of
https://github.com/AsahiLinux/u-boot
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107 lines
2.5 KiB
C
107 lines
2.5 KiB
C
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// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
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/*
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* Copyright (C) 2019, STMicroelectronics - All Rights Reserved
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*/
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#include <common.h>
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#include <dm.h>
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#include <elf.h>
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#include <remoteproc.h>
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/* Basic function to verify ELF32 image format */
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int rproc_elf32_sanity_check(ulong addr, ulong size)
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{
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Elf32_Ehdr *ehdr;
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char class;
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if (!addr) {
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pr_debug("Invalid fw address?\n");
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return -EFAULT;
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}
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if (size < sizeof(Elf32_Ehdr)) {
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pr_debug("Image is too small\n");
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return -ENOSPC;
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}
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ehdr = (Elf32_Ehdr *)addr;
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class = ehdr->e_ident[EI_CLASS];
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if (!IS_ELF(*ehdr) || ehdr->e_type != ET_EXEC || class != ELFCLASS32) {
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pr_debug("Not an executable ELF32 image\n");
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return -EPROTONOSUPPORT;
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}
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/* We assume the firmware has the same endianness as the host */
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# ifdef __LITTLE_ENDIAN
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if (ehdr->e_ident[EI_DATA] != ELFDATA2LSB) {
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# else /* BIG ENDIAN */
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if (ehdr->e_ident[EI_DATA] != ELFDATA2MSB) {
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# endif
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pr_debug("Unsupported firmware endianness\n");
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return -EILSEQ;
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}
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if (size < ehdr->e_shoff + sizeof(Elf32_Shdr)) {
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pr_debug("Image is too small\n");
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return -ENOSPC;
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}
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if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) {
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pr_debug("Image is corrupted (bad magic)\n");
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return -EBADF;
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}
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if (ehdr->e_phnum == 0) {
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pr_debug("No loadable segments\n");
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return -ENOEXEC;
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}
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if (ehdr->e_phoff > size) {
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pr_debug("Firmware size is too small\n");
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return -ENOSPC;
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}
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return 0;
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}
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/* A very simple elf loader, assumes the image is valid */
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int rproc_elf32_load_image(struct udevice *dev, 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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const struct dm_rproc_ops *ops;
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unsigned int i;
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ehdr = (Elf32_Ehdr *)addr;
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phdr = (Elf32_Phdr *)(addr + ehdr->e_phoff);
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ops = rproc_get_ops(dev);
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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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if (phdr->p_type != PT_LOAD)
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continue;
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if (ops->device_to_virt)
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dst = ops->device_to_virt(dev, (ulong)dst);
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dev_dbg(dev, "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((unsigned long)dst + phdr->p_filesz,
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ARCH_DMA_MINALIGN) -
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rounddown((unsigned long)dst, ARCH_DMA_MINALIGN));
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++phdr;
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}
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return 0;
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}
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