u-boot/board/emulation/qemu-arm/qemu-arm.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (c) 2017 Tuomas Tynkkynen
 */
#include <common.h>
#include <fdtdec.h>

#ifdef CONFIG_ARM64
#include <asm/armv8/mmu.h>

static struct mm_region qemu_arm64_mem_map[] = {
	{
		/* Flash */
		.virt = 0x00000000UL,
		.phys = 0x00000000UL,
		.size = 0x08000000UL,
		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
			 PTE_BLOCK_INNER_SHARE
	}, {
		/* Peripherals */
		.virt = 0x08000000UL,
		.phys = 0x08000000UL,
		.size = 0x38000000,
		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
			 PTE_BLOCK_NON_SHARE |
			 PTE_BLOCK_PXN | PTE_BLOCK_UXN
	}, {
		/* RAM */
		.virt = 0x40000000UL,
		.phys = 0x40000000UL,
		.size = 255UL * SZ_1G,
		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
			 PTE_BLOCK_INNER_SHARE
	}, {
		/* List terminator */
		0,
	}
};

struct mm_region *mem_map = qemu_arm64_mem_map;
#endif

int board_init(void)
{
	return 0;
}

int dram_init(void)
{
	if (fdtdec_setup_mem_size_base() != 0)
		return -EINVAL;

	return 0;
}

int dram_init_banksize(void)
{
	fdtdec_setup_memory_banksize();

	return 0;
}

void *board_fdt_blob_setup(void)
{
	/* QEMU loads a generated DTB for us at the start of RAM. */
	return (void *)CONFIG_SYS_SDRAM_BASE;
}