LXR uboot/arch/mips/mach-pic32/reset.c

   1/*
   2 * (c) 2015 Purna Chandra Mandal <purna.mandal@microchip.com>
   3 *
   4 * SPDX-License-Identifier:     GPL-2.0+
   5 *
   6 */
   7
   8#include <common.h>
   9#include <asm/io.h>
  10#include <mach/pic32.h>
  11
  12/* SYSKEY */
  13#define UNLOCK_KEY1     0xaa996655
  14#define UNLOCK_KEY2     0x556699aa
  15#define LOCK_KEY        0
  16
  17#define RSWRST          0x1250
  18
  19void _machine_restart(void)
  20{
  21        void __iomem *base;
  22
  23        base = pic32_get_syscfg_base();
  24
  25        /* unlock sequence */
  26        writel(LOCK_KEY, base + SYSKEY);
  27        writel(UNLOCK_KEY1, base + SYSKEY);
  28        writel(UNLOCK_KEY2, base + SYSKEY);
  29
  30        /* soft reset */
  31        writel(0x1, base + RSWRST);
  32        (void) readl(base + RSWRST);
  33
  34        while (1)
  35                ;
  36}
  37