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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;
}
/* Basic function to verify ELF64 image format */
int rproc_elf64_sanity_check(ulong addr, ulong size)
{
Elf64_Ehdr *ehdr = (Elf64_Ehdr *)addr;
char class;
if (!addr) {
pr_debug("Invalid fw address?\n");
return -EFAULT;
}
if (size < sizeof(Elf64_Ehdr)) {
pr_debug("Image is too small\n");
return -ENOSPC;
}
class = ehdr->e_ident[EI_CLASS];
if (!IS_ELF(*ehdr) || ehdr->e_type != ET_EXEC || class != ELFCLASS64) {
pr_debug("Not an executable ELF64 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(Elf64_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;
}
/* Basic function to verify ELF image format */
int rproc_elf_sanity_check(ulong addr, ulong size)
{
Elf32_Ehdr *ehdr = (Elf32_Ehdr *)addr;
if (!addr) {
dev_err(dev, "Invalid firmware address\n");
return -EFAULT;
}
if (ehdr->e_ident[EI_CLASS] == ELFCLASS64)
return rproc_elf64_sanity_check(addr, size);
else
return rproc_elf32_sanity_check(addr, size);
}
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;
}
int rproc_elf64_load_image(struct udevice *dev, ulong addr, ulong size)
{
const struct dm_rproc_ops *ops = rproc_get_ops(dev);
u64 da, memsz, filesz, offset;
Elf64_Ehdr *ehdr;
Elf64_Phdr *phdr;
int i, ret = 0;
void *ptr;
dev_dbg(dev, "%s: addr = 0x%lx size = 0x%lx\n", __func__, addr, size);
if (rproc_elf64_sanity_check(addr, size))
return -EINVAL;
ehdr = (Elf64_Ehdr *)addr;
phdr = (Elf64_Phdr *)(addr + (ulong)ehdr->e_phoff);
/* go through the available ELF segments */
for (i = 0; i < ehdr->e_phnum; i++, phdr++) {
da = phdr->p_paddr;
memsz = phdr->p_memsz;
filesz = phdr->p_filesz;
offset = phdr->p_offset;
if (phdr->p_type != PT_LOAD)
continue;
dev_dbg(dev, "%s:phdr: type %d da 0x%llx memsz 0x%llx filesz 0x%llx\n",
__func__, phdr->p_type, da, memsz, filesz);
ptr = (void *)(uintptr_t)da;
if (ops->device_to_virt) {
ptr = ops->device_to_virt(dev, da, phdr->p_memsz);
if (!ptr) {
dev_err(dev, "bad da 0x%llx mem 0x%llx\n", da,
memsz);
ret = -EINVAL;
break;
}
}
if (filesz)
memcpy(ptr, (void *)addr + offset, filesz);
if (filesz != memsz)
memset(ptr + filesz, 0x00, memsz - filesz);
flush_cache(rounddown((ulong)ptr, ARCH_DMA_MINALIGN),
roundup((ulong)ptr + filesz, ARCH_DMA_MINALIGN) -
rounddown((ulong)ptr, ARCH_DMA_MINALIGN));
}
return ret;
}
int rproc_elf_load_image(struct udevice *dev, ulong addr, ulong size)
{
Elf32_Ehdr *ehdr = (Elf32_Ehdr *)addr;
if (!addr) {
dev_err(dev, "Invalid firmware address\n");
return -EFAULT;
}
if (ehdr->e_ident[EI_CLASS] == ELFCLASS64)
return rproc_elf64_load_image(dev, addr, size);
else
return rproc_elf32_load_image(dev, addr, size);
}
static ulong rproc_elf32_get_boot_addr(ulong addr)
{
Elf32_Ehdr *ehdr = (Elf32_Ehdr *)addr;
return ehdr->e_entry;
}
static ulong rproc_elf64_get_boot_addr(ulong addr)
{
Elf64_Ehdr *ehdr = (Elf64_Ehdr *)addr;
return ehdr->e_entry;
}
ulong rproc_elf_get_boot_addr(struct udevice *dev, ulong addr)
{
Elf32_Ehdr *ehdr = (Elf32_Ehdr *)addr;
if (ehdr->e_ident[EI_CLASS] == ELFCLASS64)
return rproc_elf64_get_boot_addr(addr);
else
return rproc_elf32_get_boot_addr(addr);
}
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