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