143 lines
4.6 KiB
C
143 lines
4.6 KiB
C
/*
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* Copyright (C) 2020 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <types.h>
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#include <errno.h>
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#include <boot.h>
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#include <asm/pgtable.h>
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#include "multiboot_priv.h"
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/**
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* @pre abi != NULL && mb2_tag_mmap != NULL
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*/
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static void mb2_mmap_to_abi(struct acrn_boot_info *abi, const struct multiboot2_tag_mmap *mb2_tag_mmap)
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{
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uint32_t i;
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struct multiboot2_mmap_entry *mb2_mmap = (struct multiboot2_mmap_entry *)mb2_tag_mmap->entries;
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/* multiboot2 mmap tag header occupied 16 bytes */
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abi->mmap_entries = (mb2_tag_mmap->size - 16U) / sizeof(struct multiboot2_mmap_entry);
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if (abi->mmap_entries > MAX_MMAP_ENTRIES) {
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abi->mmap_entries = MAX_MMAP_ENTRIES;
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}
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for (i = 0U; i < abi->mmap_entries; i++) {
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abi->mmap_entry[i].baseaddr = (mb2_mmap + i)->addr;
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abi->mmap_entry[i].length = (mb2_mmap + i)->len;
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abi->mmap_entry[i].type = (mb2_mmap + i)->type;
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}
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}
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/**
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* @pre abi != NULL && mb2_tag_mods != NULL
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*/
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static void mb2_mods_to_abi(struct acrn_boot_info *abi,
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uint32_t mbi_mod_idx, const struct multiboot2_tag_module *mb2_tag_mods)
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{
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abi->mods[mbi_mod_idx].start = hpa2hva_early((uint64_t)mb2_tag_mods->mod_start);
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if (mb2_tag_mods->mod_end > mb2_tag_mods->mod_start) {
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abi->mods[mbi_mod_idx].size = mb2_tag_mods->mod_end - mb2_tag_mods->mod_start;
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}
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(void)strncpy_s((void *)(abi->mods[mbi_mod_idx].string), MAX_MOD_STRING_SIZE,
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(char *)hpa2hva_early((uint64_t)mb2_tag_mods->cmdline),
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strnlen_s((char *)hpa2hva_early((uint64_t)mb2_tag_mods->cmdline), MAX_MOD_STRING_SIZE));
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}
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/**
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* @pre abi != NULL && mb2_tag_efi64 != 0
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*/
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static void mb2_efi64_to_abi(struct acrn_boot_info *abi, const struct multiboot2_tag_efi64 *mb2_tag_efi64)
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{
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abi->uefi_info.systab = (uint32_t)(uint64_t)mb2_tag_efi64->pointer;
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abi->uefi_info.systab_hi = (uint32_t)((uint64_t)mb2_tag_efi64->pointer >> 32U);
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}
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/**
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* @pre abi != NULL && mb2_tag_efimmap != 0
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*/
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static void mb2_efimmap_to_abi(struct acrn_boot_info *abi,
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const struct multiboot2_tag_efi_mmap *mb2_tag_efimmap)
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{
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abi->uefi_info.memdesc_size = mb2_tag_efimmap->descr_size;
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abi->uefi_info.memdesc_version = mb2_tag_efimmap->descr_vers;
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abi->uefi_info.memmap = (uint32_t)(uint64_t)mb2_tag_efimmap->efi_mmap;
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abi->uefi_info.memmap_size = mb2_tag_efimmap->size - 16U;
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/* Per multiboot2 spec, multiboot info is below 4GB space hence memmap_hi must be 0U. */
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abi->uefi_info.memmap_hi = (uint32_t)(((uint64_t)mb2_tag_efimmap->efi_mmap) >> 32U);
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}
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/**
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* @pre abi != NULL
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*/
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int32_t multiboot2_to_acrn_bi(struct acrn_boot_info *abi, void *mb2_info)
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{
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int32_t ret = 0;
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struct multiboot2_tag *mb2_tag, *mb2_tag_end;
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uint32_t mb2_info_size = *(uint32_t *)mb2_info;
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uint32_t mod_idx = 0U;
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void *str;
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/* The start part of multiboot2 info: total mbi size (4 bytes), reserved (4 bytes) */
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mb2_tag = (struct multiboot2_tag *)((uint8_t *)mb2_info + 8U);
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mb2_tag_end = (struct multiboot2_tag *)((uint8_t *)mb2_info + mb2_info_size);
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while ((mb2_tag->type != MULTIBOOT2_TAG_TYPE_END) && (mb2_tag < mb2_tag_end)) {
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switch (mb2_tag->type) {
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case MULTIBOOT2_TAG_TYPE_CMDLINE:
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str = ((struct multiboot2_tag_string *)mb2_tag)->string;
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(void)strncpy_s((void *)(abi->cmdline), MAX_BOOTARGS_SIZE, str,
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strnlen_s(str, (MAX_BOOTARGS_SIZE - 1U)));
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break;
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case MULTIBOOT2_TAG_TYPE_MMAP:
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mb2_mmap_to_abi(abi, (const struct multiboot2_tag_mmap *)mb2_tag);
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break;
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case MULTIBOOT2_TAG_TYPE_MODULE:
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if (mod_idx < MAX_MODULE_NUM) {
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mb2_mods_to_abi(abi, mod_idx, (const struct multiboot2_tag_module *)mb2_tag);
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mod_idx++;
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}
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break;
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case MULTIBOOT2_TAG_TYPE_BOOT_LOADER_NAME:
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str = ((struct multiboot2_tag_string *)mb2_tag)->string;
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(void)strncpy_s((void *)(abi->loader_name), MAX_LOADER_NAME_SIZE, str,
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strnlen_s(str, (MAX_LOADER_NAME_SIZE - 1U)));
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break;
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case MULTIBOOT2_TAG_TYPE_ACPI_NEW:
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abi->acpi_rsdp_va = ((struct multiboot2_tag_new_acpi *)mb2_tag)->rsdp;
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break;
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case MULTIBOOT2_TAG_TYPE_EFI64:
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mb2_efi64_to_abi(abi, (const struct multiboot2_tag_efi64 *)mb2_tag);
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break;
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case MULTIBOOT2_TAG_TYPE_EFI_MMAP:
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mb2_efimmap_to_abi(abi, (const struct multiboot2_tag_efi_mmap *)mb2_tag);
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break;
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default:
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if (mb2_tag->type > MULTIBOOT2_TAG_TYPE_LOAD_BASE_ADDR) {
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ret = -EINVAL;
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}
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break;
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}
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if (mb2_tag->size == 0U) {
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ret = -EINVAL;
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}
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if (ret != 0) {
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break;
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}
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/*
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* tag->size does not include padding whearas each tag
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* start at 8-bytes aligned address.
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*/
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mb2_tag = (struct multiboot2_tag *)((uint8_t *)mb2_tag
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+ ((mb2_tag->size + (MULTIBOOT2_INFO_ALIGN - 1U)) & ~(MULTIBOOT2_INFO_ALIGN - 1U)));
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}
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abi->mods_count = mod_idx;
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return ret;
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}
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