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 #ifdef CONFIG_SYS_ICACHE_OFF
  16         icache_disable();
  17 #else
  18         icache_enable();
  19         invalidate_icache_all();
  20 #endif
  21
  22         flush_dcache_all();
  23 #ifdef CONFIG_SYS_DCACHE_OFF
  24         dcache_disable();
  25 #else
  26         dcache_enable();
  27 #endif
  28         timer_init();
  29
  30 /* In simulation (ISS) "CHIPID" and "ARCNUM" are all "ff" */
  31         if ((read_aux_reg(ARC_AUX_IDENTITY) & 0xffffff00) == 0xffffff00)
  32                 gd->arch.running_on_hw = 0;
  33         else
  34                 gd->arch.running_on_hw = 1;
  35
  36         gd->cpu_clk = CONFIG_SYS_CLK_FREQ;
  37         gd->ram_size = CONFIG_SYS_SDRAM_SIZE;
  38
  39         return 0;
  40 }
  41
  42 int arch_early_init_r(void)
  43 {
  44         gd->bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
  45         gd->bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE;
  46         return 0;
  47 }