src/soc/amd/common/fsp/fsp_memmap.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <amdblocks/memmap.h>
   4 #include <console/console.h>
   5 #include <fsp/util.h>
   6 #include <FspGuids.h>
   7 #include <memrange.h>
   8 #include <types.h>
   9
  10 void fsp_get_smm_region(uintptr_t *start, size_t *size)
  11 {
  12         static uintptr_t smm_start;
  13         static size_t smm_size;
  14
  15         *start = smm_start;
  16         *size = smm_size;
  17         if (*size && *start)
  18                 return;
  19
  20         struct range_entry tseg;
  21
  22         if (fsp_find_range_hob(&tseg, AMD_FSP_TSEG_HOB_GUID.b) != CB_SUCCESS) {
  23                 printk(BIOS_ERR, "unable to find TSEG HOB\n");
  24                 return;
  25         }
  26
  27         smm_start = (uintptr_t)range_entry_base(&tseg);
  28         smm_size =  range_entry_size(&tseg);
  29         *start = smm_start;
  30         *size = smm_size;
  31 }