arch/x86/lib/init_helpers.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2011
   4  * Graeme Russ, <graeme.russ@gmail.com>
   5  */
   6
   7 #include <common.h>
   8 #include <linux/errno.h>
   9 #include <asm/mtrr.h>
  10
  11 DECLARE_GLOBAL_DATA_PTR;
  12
  13 /* Get the top of usable RAM */
  14 __weak ulong board_get_usable_ram_top(ulong total_size)
  15 {
  16         return gd->ram_size;
  17 }
  18
  19 int init_cache_f_r(void)
  20 {
  21 #if (CONFIG_IS_ENABLED(X86_32BIT_INIT) || \
  22      (!defined(CONFIG_SPL_BUILD) && \
  23       !CONFIG_IS_ENABLED(CONFIG_X86_RUN_64BIT))) && \
  24     !defined(CONFIG_HAVE_FSP)
  25         int ret;
  26
  27         ret = mtrr_commit(false);
  28         /* If MTRR MSR is not implemented by the processor, just ignore it */
  29         if (ret && ret != -ENOSYS)
  30                 return ret;
  31 #endif
  32         /* Initialise the CPU cache(s) */
  33         return init_cache();
  34 }