LXR uboot/arch/xtensa/cpu/cpu.c

   1/*
   2 * (C) Copyright 2008 - 2013 Tensilica Inc.
   3 * (C) Copyright 2014 - 2016 Cadence Design Systems Inc.
   4 *
   5 * SPDX-License-Identifier:     GPL-2.0+
   6 */
   7
   8/*
   9 * CPU specific code
  10 */
  11
  12#include <common.h>
  13#include <command.h>
  14#include <linux/stringify.h>
  15#include <asm/global_data.h>
  16#include <asm/cache.h>
  17#include <asm/string.h>
  18#include <asm/misc.h>
  19
  20DECLARE_GLOBAL_DATA_PTR;
  21
  22gd_t *gd __attribute__((section(".data")));
  23
  24#if defined(CONFIG_DISPLAY_CPUINFO)
  25/*
  26 * Print information about the CPU.
  27 */
  28
  29int print_cpuinfo(void)
  30{
  31        char buf[120], mhz[8];
  32        uint32_t id0, id1;
  33
  34        asm volatile ("rsr %0, 176\n"
  35                      "rsr %1, 208\n"
  36                      : "=r"(id0), "=r"(id1));
  37
  38        sprintf(buf, "CPU:   Xtensa %s (id: %08x:%08x) at %s MHz\n",
  39                XCHAL_CORE_ID, id0, id1, strmhz(mhz, gd->cpu_clk));
  40        puts(buf);
  41        return 0;
  42}
  43#endif
  44
  45int arch_cpu_init(void)
  46{
  47        gd->ram_size = CONFIG_SYS_SDRAM_SIZE;
  48        return 0;
  49}
  50