src/arch/x86/mmap_boot.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <boot_device.h>
   4 #include <spi_flash.h>
   5 #include <stdint.h>
   6
   7 /* The ROM is memory mapped just below 4GiB. Form a pointer for the base. */
   8 #define rom_base ((void *)(uintptr_t)(0x100000000ULL-CONFIG_ROM_SIZE))
   9
  10 static const struct mem_region_device boot_dev =
  11         MEM_REGION_DEV_RO_INIT(rom_base, CONFIG_ROM_SIZE);
  12
  13 const struct region_device *boot_device_ro(void)
  14 {
  15         return &boot_dev.rdev;
  16 }
  17
  18 uint32_t spi_flash_get_mmap_windows(struct flash_mmap_window *table)
  19 {
  20         table->flash_base = 0;
  21         table->host_base = (uint32_t)(uintptr_t)rom_base;
  22         table->size = CONFIG_ROM_SIZE;
  23
  24         return 1;
  25 }