arch/arc/lib/cpu.c

   1 /*
   2  * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <asm/arcregs.h>
   9 #include <asm/cache.h>
  10
  11 DECLARE_GLOBAL_DATA_PTR;
  12
  13 int arch_cpu_init(void)
  14 {
  15         timer_init();
  16
  17 /* In simulation (ISS) "CHIPID" and "ARCNUM" are all "ff" */
  18         if ((read_aux_reg(ARC_AUX_IDENTITY) & 0xffffff00) == 0xffffff00)
  19                 gd->arch.running_on_hw = 0;
  20         else
  21                 gd->arch.running_on_hw = 1;
  22
  23         gd->cpu_clk = CONFIG_SYS_CLK_FREQ;
  24         gd->ram_size = CONFIG_SYS_SDRAM_SIZE;
  25
  26         return 0;
  27 }
  28
  29 int arch_early_init_r(void)
  30 {
  31         gd->bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
  32         gd->bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE;
  33         return 0;
  34 }