acrn-hypervisor/hypervisor/bsp/uefi/uefi.c

/*
 * Copyright (C) 2018 Intel Corporation. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <hypervisor.h>
#include <multiboot.h>
#include <boot_context.h>
#include <uefi.h>

static struct efi_context efi_ctx;
static struct lapic_regs uefi_lapic_regs;
static int32_t efi_initialized;

static void efi_init(void)
{
	struct multiboot_info *mbi = NULL;

	if (boot_regs[0] != MULTIBOOT_INFO_MAGIC) {
		pr_err("no multiboot info found");
	} else {

		mbi = (struct multiboot_info *) hpa2hva(((uint64_t)(uint32_t)boot_regs[1]));
		if ((mbi->mi_flags & MULTIBOOT_INFO_HAS_DRIVES) == 0U) {
			pr_err("no multiboot drivers for uefi found");
		} else {

			memcpy_s(&efi_ctx, sizeof(struct efi_context), hpa2hva((uint64_t)mbi->mi_drives_addr),
				sizeof(struct efi_context));
			save_lapic(&uefi_lapic_regs);
			efi_initialized = 1;
		}
	}
}

void *bsp_get_rsdp(void)
{
	if (!efi_initialized) {
		efi_init();
	}

	return hpa2hva((uint64_t)efi_ctx.rsdp);
}

uint64_t bsp_get_ap_trampoline(void)
{
	return (uint64_t)efi_ctx.ap_trampoline_buf;
}

const struct efi_context *get_efi_ctx(void)
{
	return &efi_ctx;
}

const struct lapic_regs *get_efi_lapic_regs(void)
{
	return &uefi_lapic_regs;
}

void bsp_init_irq(void)
{
}

void init_bsp(void)
{
#ifndef CONFIG_CONSTANT_ACPI
	acpi_fixup();
#endif
	parse_hv_cmdline();

	if (!efi_initialized)
		efi_init();
}