mirror of
https://github.com/projectacrn/acrn-hypervisor.git
synced 2025-05-03 22:17:03 +00:00
28824c1e74
In the commit of 4e1deab3d9, we changed the
init sequence that init paging first and then init e820 because we worried
about the efi memory map could be beyond 4GB space on some platform.
After we double checked multiboot2 spec, when system boot from multiboot2
protocol, the efi memory map info will be embedded in multiboot info so it
is guaranteed that the efi memory map must be under 4GB space. Consider that
the page table will be allocated in free memory space in future, we have
to change the init sequence back that init e820 first and then init paging.
If we need to support other boot protocol in future that the efi memory map
might be put beyond 4GB, we could have below options:
1. Request bootloader put efi memory map below 4GB;
2. Call EFI_BOOT_SERVICES.GetMemoryMap() before ExitBootServices();
3. Enable a early 64bit page table to get the efi memory map only;
Tracked-On: #5626
Signed-off-by: Victor Sun <victor.sun@intel.com>
80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
/*
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* Copyright (C) 2021 Intel Corporation.
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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 <asm/pgtable.h>
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#include <boot.h>
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#include <rtl.h>
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#include <logmsg.h>
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static struct acrn_boot_info acrn_bi = { 0U };
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/**
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* @pre (p_start != NULL) && (p_end != NULL)
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*/
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void get_boot_mods_range(uint64_t *p_start, uint64_t *p_end)
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{
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uint32_t i;
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uint64_t start = ~0UL, end = 0UL;
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struct acrn_boot_info *abi = get_acrn_boot_info();
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for (i = 0; i < abi->mods_count; i++) {
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if (hva2hpa(abi->mods[i].start) < start) {
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start = hva2hpa(abi->mods[i].start);
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}
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if (hva2hpa(abi->mods[i].start + abi->mods[i].size) > end) {
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end = hva2hpa(abi->mods[i].start + abi->mods[i].size);
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}
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}
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*p_start = start;
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*p_end = end;
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}
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void init_acrn_boot_info(uint32_t *registers)
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{
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(void)init_multiboot_info(registers);
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/* TODO: add more boot protocol support here */
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}
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int32_t sanitize_acrn_boot_info(struct acrn_boot_info *abi)
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{
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int32_t abi_status = 0;
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if (abi->mods_count == 0U) {
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pr_err("no boot module info found");
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abi_status = -EINVAL;
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}
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if (abi->mmap_entries == 0U) {
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pr_err("no boot mmap info found");
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abi_status = -EINVAL;
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}
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printf("%s environment detected.\n", boot_from_uefi(abi) ? "UEFI" : "Non-UEFI");
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if (boot_from_uefi(abi) && ((abi->uefi_info.memmap == 0U) || (abi->uefi_info.memmap_hi != 0U))) {
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pr_err("no efi memmap found below 4GB space!");
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abi_status = -EINVAL;
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}
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if (abi->loader_name[0] == '\0') {
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pr_err("no bootloader name found!");
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abi_status = -EINVAL;
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} else {
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printf("%s Bootloader: %s\n", abi->protocol_name, abi->loader_name);
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}
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return abi_status;
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}
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/*
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* @post retval != NULL
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*/
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struct acrn_boot_info *get_acrn_boot_info(void)
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{
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return &acrn_bi;
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}
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