LXR uboot/arch/arm/mach-at91/armv7/cpu.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2010
   4 * Reinhard Meyer, reinhard.meyer@emk-elektronik.de
   5 * (C) Copyright 2009
   6 * Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
   7 * (C) Copyright 2013
   8 * Bo Shen <voice.shen@atmel.com>
   9 */
  10
  11#include <common.h>
  12#include <cpu_func.h>
  13#include <vsprintf.h>
  14#include <asm/io.h>
  15#include <asm/arch/hardware.h>
  16#include <asm/arch/at91_pit.h>
  17#include <asm/arch/at91_gpbr.h>
  18#include <asm/arch/clk.h>
  19
  20#ifndef CONFIG_SYS_AT91_MAIN_CLOCK
  21#define CONFIG_SYS_AT91_MAIN_CLOCK 0
  22#endif
  23
  24int arch_cpu_init(void)
  25{
  26        return at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK);
  27}
  28
  29void arch_preboot_os(void)
  30{
  31        ulong cpiv;
  32        at91_pit_t *pit = (at91_pit_t *)ATMEL_BASE_PIT;
  33
  34        cpiv = AT91_PIT_MR_PIV_MASK(readl(&pit->piir));
  35
  36        /*
  37         * Disable PITC
  38         * Add 0x1000 to current counter to stop it faster
  39         * without waiting for wrapping back to 0
  40         */
  41        writel(cpiv + 0x1000, &pit->mr);
  42}
  43
  44#if defined(CONFIG_DISPLAY_CPUINFO)
  45int print_cpuinfo(void)
  46{
  47        char buf[32];
  48
  49        printf("CPU: %s\n", get_cpu_name());
  50        printf("Crystal frequency: %8s MHz\n",
  51               strmhz(buf, get_main_clk_rate()));
  52        printf("CPU clock        : %8s MHz\n",
  53               strmhz(buf, get_cpu_clk_rate()));
  54        printf("Master clock     : %8s MHz\n",
  55               strmhz(buf, get_mck_clk_rate()));
  56
  57        return 0;
  58}
  59#endif
  60
  61void enable_caches(void)
  62{
  63        icache_enable();
  64        dcache_enable();
  65}
  66
  67#define ATMEL_CHIPID_CIDR_VERSION       0x1f
  68
  69unsigned int get_chip_id(void)
  70{
  71        return readl(ATMEL_CHIPID_CIDR) & ~ATMEL_CHIPID_CIDR_VERSION;
  72}
  73
  74unsigned int get_extension_chip_id(void)
  75{
  76        return readl(ATMEL_CHIPID_EXID);
  77}
  78