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 19 void _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