src/soc/amd/genoa_poc/mmap_boot.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <boot_device.h>
   4 #include <endian.h>
   5 #include <spi_flash.h>
   6
   7 #if CONFIG_ROM_SIZE >= (16 * MiB)
   8 #define ROM_SIZE (16 * MiB)
   9 #else
  10 #define ROM_SIZE CONFIG_ROM_SIZE
  11 #endif
  12
  13 /* The ROM is memory mapped just below 4GiB. Form a pointer for the base. */
  14 #define rom_base ((void *)(uintptr_t)(0x100000000ULL-ROM_SIZE))
  15
  16 static const struct mem_region_device boot_dev =
  17         MEM_REGION_DEV_RO_INIT(rom_base, ROM_SIZE);
  18
  19 const struct region_device *boot_device_ro(void)
  20 {
  21         return &boot_dev.rdev;
  22 }
  23
  24 uint32_t spi_flash_get_mmap_windows(struct flash_mmap_window *table)
  25 {
  26         table->flash_base = 0;
  27         table->host_base = (uint32_t)(uintptr_t)rom_base;
  28         table->size = ROM_SIZE;
  29
  30         return 1;
  31 }