summaryrefslogtreecommitdiff
path: root/src/arch/x86/mmap_boot.c
blob: f0ccc86fbeaaa4cda1aef2677b4af0df2f910528 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
/* SPDX-License-Identifier: GPL-2.0-only */

#include <boot_device.h>
#include <endian.h>
#include <spi_flash.h>

/* The ROM is memory mapped just below 4GiB. Form a pointer for the base. */
#define rom_base ((void *)(uintptr_t)(0x100000000ULL-CONFIG_ROM_SIZE))

static const struct mem_region_device boot_dev =
	MEM_REGION_DEV_RO_INIT(rom_base, CONFIG_ROM_SIZE);

const struct region_device *boot_device_ro(void)
{
	return &boot_dev.rdev;
}

uint32_t spi_flash_get_mmap_windows(struct flash_mmap_window *table)
{
	table->flash_base = 0;
	table->host_base = (uint32_t)(uintptr_t)rom_base;
	table->size = CONFIG_ROM_SIZE;

	return 1;
}