arch/x86/lib/init_helpers.c

   1 /*
   2  * (C) Copyright 2011
   3  * Graeme Russ, <graeme.russ@gmail.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <linux/errno.h>
  10 #include <asm/mtrr.h>
  11
  12 DECLARE_GLOBAL_DATA_PTR;
  13
  14 /* Get the top of usable RAM */
  15 __weak ulong board_get_usable_ram_top(ulong total_size)
  16 {
  17         return gd->ram_size;
  18 }
  19
  20 int init_cache_f_r(void)
  21 {
  22 #if CONFIG_IS_ENABLED(X86_32BIT_INIT) && !defined(CONFIG_HAVE_FSP)
  23         int ret;
  24
  25         ret = mtrr_commit(false);
  26         /* If MTRR MSR is not implemented by the processor, just ignore it */
  27         if (ret && ret != -ENOSYS)
  28                 return ret;
  29 #endif
  30         /* Initialise the CPU cache(s) */
  31         return init_cache();
  32 }