upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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300 lines
8.4 KiB
300 lines
8.4 KiB
// SPDX-License-Identifier: GPL-2.0+
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/*
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* EFI image loader
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*
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* based partly on wine code
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*
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* Copyright (c) 2016 Alexander Graf
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*/
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#include <common.h>
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#include <efi_loader.h>
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#include <pe.h>
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#include <asm/global_data.h>
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const efi_guid_t efi_global_variable_guid = EFI_GLOBAL_VARIABLE_GUID;
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const efi_guid_t efi_guid_device_path = DEVICE_PATH_GUID;
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const efi_guid_t efi_guid_loaded_image = LOADED_IMAGE_GUID;
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const efi_guid_t efi_simple_file_system_protocol_guid =
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EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID;
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const efi_guid_t efi_file_info_guid = EFI_FILE_INFO_GUID;
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static int machines[] = {
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#if defined(CONFIG_ARM64)
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IMAGE_FILE_MACHINE_ARM64,
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#elif defined(CONFIG_ARM)
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IMAGE_FILE_MACHINE_ARM,
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IMAGE_FILE_MACHINE_THUMB,
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IMAGE_FILE_MACHINE_ARMNT,
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#endif
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#if defined(CONFIG_X86_64)
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IMAGE_FILE_MACHINE_AMD64,
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#elif defined(CONFIG_X86)
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IMAGE_FILE_MACHINE_I386,
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#endif
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#if defined(CONFIG_CPU_RISCV_32)
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IMAGE_FILE_MACHINE_RISCV32,
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#endif
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#if defined(CONFIG_CPU_RISCV_64)
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IMAGE_FILE_MACHINE_RISCV64,
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#endif
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0 };
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/*
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* Print information about a loaded image.
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*
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* If the program counter is located within the image the offset to the base
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* address is shown.
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*
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* @image: loaded image
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* @pc: program counter (use NULL to suppress offset output)
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* @return: status code
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*/
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efi_status_t efi_print_image_info(struct efi_loaded_image *image, void *pc)
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{
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if (!image)
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return EFI_INVALID_PARAMETER;
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printf("UEFI image");
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printf(" [0x%p:0x%p]",
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image->reloc_base, image->reloc_base + image->reloc_size - 1);
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if (pc && pc >= image->reloc_base &&
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pc < image->reloc_base + image->reloc_size)
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printf(" pc=0x%zx", pc - image->reloc_base);
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if (image->file_path)
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printf(" '%pD'", image->file_path);
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printf("\n");
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return EFI_SUCCESS;
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}
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/*
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* Print information about all loaded images.
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*
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* @pc: program counter (use NULL to suppress offset output)
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*/
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void efi_print_image_infos(void *pc)
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{
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struct efi_object *efiobj;
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struct efi_handler *handler;
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list_for_each_entry(efiobj, &efi_obj_list, link) {
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list_for_each_entry(handler, &efiobj->protocols, link) {
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if (!guidcmp(handler->guid, &efi_guid_loaded_image)) {
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efi_print_image_info(
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handler->protocol_interface, pc);
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}
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}
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}
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}
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static efi_status_t efi_loader_relocate(const IMAGE_BASE_RELOCATION *rel,
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unsigned long rel_size, void *efi_reloc)
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{
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const IMAGE_BASE_RELOCATION *end;
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int i;
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end = (const IMAGE_BASE_RELOCATION *)((const char *)rel + rel_size);
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while (rel < end - 1 && rel->SizeOfBlock) {
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const uint16_t *relocs = (const uint16_t *)(rel + 1);
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i = (rel->SizeOfBlock - sizeof(*rel)) / sizeof(uint16_t);
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while (i--) {
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uint32_t offset = (uint32_t)(*relocs & 0xfff) +
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rel->VirtualAddress;
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int type = *relocs >> EFI_PAGE_SHIFT;
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unsigned long delta = (unsigned long)efi_reloc;
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uint64_t *x64 = efi_reloc + offset;
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uint32_t *x32 = efi_reloc + offset;
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uint16_t *x16 = efi_reloc + offset;
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switch (type) {
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case IMAGE_REL_BASED_ABSOLUTE:
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break;
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case IMAGE_REL_BASED_HIGH:
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*x16 += ((uint32_t)delta) >> 16;
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break;
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case IMAGE_REL_BASED_LOW:
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*x16 += (uint16_t)delta;
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break;
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case IMAGE_REL_BASED_HIGHLOW:
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*x32 += (uint32_t)delta;
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break;
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case IMAGE_REL_BASED_DIR64:
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*x64 += (uint64_t)delta;
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break;
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default:
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printf("Unknown Relocation off %x type %x\n",
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offset, type);
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return EFI_LOAD_ERROR;
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}
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relocs++;
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}
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rel = (const IMAGE_BASE_RELOCATION *)relocs;
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}
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return EFI_SUCCESS;
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}
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void __weak invalidate_icache_all(void)
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{
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/* If the system doesn't support icache_all flush, cross our fingers */
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}
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/*
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* Determine the memory types to be used for code and data.
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*
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* @loaded_image_info image descriptor
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* @image_type field Subsystem of the optional header for
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* Windows specific field
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*/
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static void efi_set_code_and_data_type(
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struct efi_loaded_image *loaded_image_info,
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uint16_t image_type)
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{
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switch (image_type) {
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case IMAGE_SUBSYSTEM_EFI_APPLICATION:
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loaded_image_info->image_code_type = EFI_LOADER_CODE;
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loaded_image_info->image_data_type = EFI_LOADER_DATA;
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break;
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case IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER:
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loaded_image_info->image_code_type = EFI_BOOT_SERVICES_CODE;
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loaded_image_info->image_data_type = EFI_BOOT_SERVICES_DATA;
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break;
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case IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER:
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case IMAGE_SUBSYSTEM_EFI_ROM:
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loaded_image_info->image_code_type = EFI_RUNTIME_SERVICES_CODE;
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loaded_image_info->image_data_type = EFI_RUNTIME_SERVICES_DATA;
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break;
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default:
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printf("%s: invalid image type: %u\n", __func__, image_type);
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/* Let's assume it is an application */
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loaded_image_info->image_code_type = EFI_LOADER_CODE;
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loaded_image_info->image_data_type = EFI_LOADER_DATA;
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break;
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}
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}
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/*
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* This function loads all sections from a PE binary into a newly reserved
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* piece of memory. On successful load it then returns the entry point for
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* the binary. Otherwise NULL.
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*/
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void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info)
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{
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IMAGE_NT_HEADERS32 *nt;
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IMAGE_DOS_HEADER *dos;
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IMAGE_SECTION_HEADER *sections;
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int num_sections;
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void *efi_reloc;
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int i;
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const IMAGE_BASE_RELOCATION *rel;
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unsigned long rel_size;
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int rel_idx = IMAGE_DIRECTORY_ENTRY_BASERELOC;
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void *entry;
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uint64_t image_size;
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unsigned long virt_size = 0;
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int supported = 0;
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dos = efi;
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if (dos->e_magic != IMAGE_DOS_SIGNATURE) {
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printf("%s: Invalid DOS Signature\n", __func__);
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return NULL;
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}
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nt = (void *) ((char *)efi + dos->e_lfanew);
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if (nt->Signature != IMAGE_NT_SIGNATURE) {
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printf("%s: Invalid NT Signature\n", __func__);
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return NULL;
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}
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for (i = 0; machines[i]; i++)
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if (machines[i] == nt->FileHeader.Machine) {
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supported = 1;
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break;
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}
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if (!supported) {
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printf("%s: Machine type 0x%04x is not supported\n",
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__func__, nt->FileHeader.Machine);
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return NULL;
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}
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/* Calculate upper virtual address boundary */
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num_sections = nt->FileHeader.NumberOfSections;
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sections = (void *)&nt->OptionalHeader +
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nt->FileHeader.SizeOfOptionalHeader;
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for (i = num_sections - 1; i >= 0; i--) {
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IMAGE_SECTION_HEADER *sec = §ions[i];
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virt_size = max_t(unsigned long, virt_size,
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sec->VirtualAddress + sec->Misc.VirtualSize);
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}
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/* Read 32/64bit specific header bits */
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if (nt->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR64_MAGIC) {
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IMAGE_NT_HEADERS64 *nt64 = (void *)nt;
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IMAGE_OPTIONAL_HEADER64 *opt = &nt64->OptionalHeader;
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image_size = opt->SizeOfImage;
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efi_set_code_and_data_type(loaded_image_info, opt->Subsystem);
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efi_reloc = efi_alloc(virt_size,
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loaded_image_info->image_code_type);
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if (!efi_reloc) {
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printf("%s: Could not allocate %lu bytes\n",
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__func__, virt_size);
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return NULL;
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}
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entry = efi_reloc + opt->AddressOfEntryPoint;
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rel_size = opt->DataDirectory[rel_idx].Size;
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rel = efi_reloc + opt->DataDirectory[rel_idx].VirtualAddress;
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virt_size = ALIGN(virt_size, opt->SectionAlignment);
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} else if (nt->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC) {
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IMAGE_OPTIONAL_HEADER32 *opt = &nt->OptionalHeader;
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image_size = opt->SizeOfImage;
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efi_set_code_and_data_type(loaded_image_info, opt->Subsystem);
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efi_reloc = efi_alloc(virt_size,
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loaded_image_info->image_code_type);
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if (!efi_reloc) {
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printf("%s: Could not allocate %lu bytes\n",
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__func__, virt_size);
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return NULL;
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}
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entry = efi_reloc + opt->AddressOfEntryPoint;
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rel_size = opt->DataDirectory[rel_idx].Size;
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rel = efi_reloc + opt->DataDirectory[rel_idx].VirtualAddress;
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virt_size = ALIGN(virt_size, opt->SectionAlignment);
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} else {
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printf("%s: Invalid optional header magic %x\n", __func__,
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nt->OptionalHeader.Magic);
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return NULL;
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}
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/* Load sections into RAM */
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for (i = num_sections - 1; i >= 0; i--) {
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IMAGE_SECTION_HEADER *sec = §ions[i];
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memset(efi_reloc + sec->VirtualAddress, 0,
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sec->Misc.VirtualSize);
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memcpy(efi_reloc + sec->VirtualAddress,
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efi + sec->PointerToRawData,
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sec->SizeOfRawData);
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}
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/* Run through relocations */
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if (efi_loader_relocate(rel, rel_size, efi_reloc) != EFI_SUCCESS) {
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efi_free_pages((uintptr_t) efi_reloc,
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(virt_size + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT);
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return NULL;
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}
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/* Flush cache */
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flush_cache((ulong)efi_reloc,
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ALIGN(virt_size, CONFIG_SYS_CACHELINE_SIZE));
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invalidate_icache_all();
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/* Populate the loaded image interface bits */
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loaded_image_info->image_base = efi;
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loaded_image_info->image_size = image_size;
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loaded_image_info->reloc_base = efi_reloc;
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loaded_image_info->reloc_size = virt_size;
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return entry;
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}
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