143 lines
4.6 KiB
C
143 lines
4.6 KiB
C
/*
|
|
* Copyright (C) 2020-2022 Intel Corporation.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include <types.h>
|
|
#include <errno.h>
|
|
#include <boot.h>
|
|
#include <asm/pgtable.h>
|
|
#include "multiboot_priv.h"
|
|
|
|
/**
|
|
* @pre abi != NULL && mb2_tag_mmap != NULL
|
|
*/
|
|
static void mb2_mmap_to_abi(struct acrn_boot_info *abi, const struct multiboot2_tag_mmap *mb2_tag_mmap)
|
|
{
|
|
uint32_t i;
|
|
struct multiboot2_mmap_entry *mb2_mmap = (struct multiboot2_mmap_entry *)mb2_tag_mmap->entries;
|
|
|
|
/* multiboot2 mmap tag header occupied 16 bytes */
|
|
abi->mmap_entries = (mb2_tag_mmap->size - 16U) / sizeof(struct multiboot2_mmap_entry);
|
|
if (abi->mmap_entries > MAX_MMAP_ENTRIES) {
|
|
abi->mmap_entries = MAX_MMAP_ENTRIES;
|
|
}
|
|
|
|
for (i = 0U; i < abi->mmap_entries; i++) {
|
|
abi->mmap_entry[i].baseaddr = (mb2_mmap + i)->addr;
|
|
abi->mmap_entry[i].length = (mb2_mmap + i)->len;
|
|
abi->mmap_entry[i].type = (mb2_mmap + i)->type;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @pre abi != NULL && mb2_tag_mods != NULL
|
|
*/
|
|
static void mb2_mods_to_abi(struct acrn_boot_info *abi,
|
|
uint32_t mbi_mod_idx, const struct multiboot2_tag_module *mb2_tag_mods)
|
|
{
|
|
abi->mods[mbi_mod_idx].start = hpa2hva_early((uint64_t)mb2_tag_mods->mod_start);
|
|
if (mb2_tag_mods->mod_end > mb2_tag_mods->mod_start) {
|
|
abi->mods[mbi_mod_idx].size = mb2_tag_mods->mod_end - mb2_tag_mods->mod_start;
|
|
}
|
|
|
|
(void)strncpy_s((void *)(abi->mods[mbi_mod_idx].string), MAX_MOD_STRING_SIZE,
|
|
(char *)hpa2hva_early((uint64_t)mb2_tag_mods->cmdline),
|
|
strnlen_s((char *)hpa2hva_early((uint64_t)mb2_tag_mods->cmdline), MAX_MOD_STRING_SIZE));
|
|
}
|
|
|
|
/**
|
|
* @pre abi != NULL && mb2_tag_efi64 != 0
|
|
*/
|
|
static void mb2_efi64_to_abi(struct acrn_boot_info *abi, const struct multiboot2_tag_efi64 *mb2_tag_efi64)
|
|
{
|
|
abi->uefi_info.systab = (uint32_t)(uint64_t)mb2_tag_efi64->pointer;
|
|
abi->uefi_info.systab_hi = (uint32_t)((uint64_t)mb2_tag_efi64->pointer >> 32U);
|
|
}
|
|
|
|
/**
|
|
* @pre abi != NULL && mb2_tag_efimmap != 0
|
|
*/
|
|
static void mb2_efimmap_to_abi(struct acrn_boot_info *abi,
|
|
const struct multiboot2_tag_efi_mmap *mb2_tag_efimmap)
|
|
{
|
|
abi->uefi_info.memdesc_size = mb2_tag_efimmap->descr_size;
|
|
abi->uefi_info.memdesc_version = mb2_tag_efimmap->descr_vers;
|
|
abi->uefi_info.memmap = (uint32_t)(uint64_t)mb2_tag_efimmap->efi_mmap;
|
|
abi->uefi_info.memmap_size = mb2_tag_efimmap->size - 16U;
|
|
/* Per multiboot2 spec, multiboot info is below 4GB space hence memmap_hi must be 0U. */
|
|
abi->uefi_info.memmap_hi = (uint32_t)(((uint64_t)mb2_tag_efimmap->efi_mmap) >> 32U);
|
|
}
|
|
|
|
/**
|
|
* @pre abi != NULL
|
|
*/
|
|
int32_t multiboot2_to_acrn_bi(struct acrn_boot_info *abi, void *mb2_info)
|
|
{
|
|
int32_t ret = 0;
|
|
struct multiboot2_tag *mb2_tag, *mb2_tag_end;
|
|
uint32_t mb2_info_size = *(uint32_t *)mb2_info;
|
|
uint32_t mod_idx = 0U;
|
|
void *str;
|
|
|
|
/* The start part of multiboot2 info: total mbi size (4 bytes), reserved (4 bytes) */
|
|
mb2_tag = (struct multiboot2_tag *)((uint8_t *)mb2_info + 8U);
|
|
mb2_tag_end = (struct multiboot2_tag *)((uint8_t *)mb2_info + mb2_info_size);
|
|
|
|
while ((mb2_tag->type != MULTIBOOT2_TAG_TYPE_END) && (mb2_tag < mb2_tag_end)) {
|
|
switch (mb2_tag->type) {
|
|
case MULTIBOOT2_TAG_TYPE_CMDLINE:
|
|
str = ((struct multiboot2_tag_string *)mb2_tag)->string;
|
|
(void)strncpy_s((void *)(abi->cmdline), MAX_BOOTARGS_SIZE, str,
|
|
strnlen_s(str, (MAX_BOOTARGS_SIZE - 1U)));
|
|
break;
|
|
case MULTIBOOT2_TAG_TYPE_MMAP:
|
|
mb2_mmap_to_abi(abi, (const struct multiboot2_tag_mmap *)mb2_tag);
|
|
break;
|
|
case MULTIBOOT2_TAG_TYPE_MODULE:
|
|
if (mod_idx < MAX_MODULE_NUM) {
|
|
mb2_mods_to_abi(abi, mod_idx, (const struct multiboot2_tag_module *)mb2_tag);
|
|
mod_idx++;
|
|
}
|
|
break;
|
|
case MULTIBOOT2_TAG_TYPE_BOOT_LOADER_NAME:
|
|
str = ((struct multiboot2_tag_string *)mb2_tag)->string;
|
|
(void)strncpy_s((void *)(abi->loader_name), MAX_LOADER_NAME_SIZE, str,
|
|
strnlen_s(str, (MAX_LOADER_NAME_SIZE - 1U)));
|
|
break;
|
|
case MULTIBOOT2_TAG_TYPE_ACPI_NEW:
|
|
abi->acpi_rsdp_va = ((struct multiboot2_tag_new_acpi *)mb2_tag)->rsdp;
|
|
break;
|
|
case MULTIBOOT2_TAG_TYPE_EFI64:
|
|
mb2_efi64_to_abi(abi, (const struct multiboot2_tag_efi64 *)mb2_tag);
|
|
break;
|
|
case MULTIBOOT2_TAG_TYPE_EFI_MMAP:
|
|
mb2_efimmap_to_abi(abi, (const struct multiboot2_tag_efi_mmap *)mb2_tag);
|
|
break;
|
|
default:
|
|
if (mb2_tag->type > MULTIBOOT2_TAG_TYPE_LOAD_BASE_ADDR) {
|
|
ret = -EINVAL;
|
|
}
|
|
break;
|
|
}
|
|
if (mb2_tag->size == 0U) {
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
if (ret != 0) {
|
|
break;
|
|
}
|
|
/*
|
|
* tag->size does not include padding whearas each tag
|
|
* start at 8-bytes aligned address.
|
|
*/
|
|
mb2_tag = (struct multiboot2_tag *)((uint8_t *)mb2_tag
|
|
+ ((mb2_tag->size + (MULTIBOOT2_INFO_ALIGN - 1U)) & ~(MULTIBOOT2_INFO_ALIGN - 1U)));
|
|
}
|
|
|
|
abi->mods_count = mod_idx;
|
|
|
|
return ret;
|
|
}
|