1/* 2 * misc setup functions for MPC83xx 3 * 4 * Maintainer: Kumar Gala <galak@kernel.crashing.org> 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation; either version 2 of the License, or (at your 9 * option) any later version. 10 */ 11 12#include <linux/stddef.h> 13#include <linux/kernel.h> 14 15#include <asm/io.h> 16#include <asm/hw_irq.h> 17#include <sysdev/fsl_soc.h> 18 19#include "mpc83xx.h" 20 21static __be32 __iomem *restart_reg_base; 22 23static int __init mpc83xx_restart_init(void) 24{ 25 /* map reset restart_reg_baseister space */ 26 restart_reg_base = ioremap(get_immrbase() + 0x900, 0xff); 27 28 return 0; 29} 30 31arch_initcall(mpc83xx_restart_init); 32 33void mpc83xx_restart(char *cmd) 34{ 35#define RST_OFFSET 0x00000900 36#define RST_PROT_REG 0x00000018 37#define RST_CTRL_REG 0x0000001c 38 39 local_irq_disable(); 40 41 if (restart_reg_base) { 42 /* enable software reset "RSTE" */ 43 out_be32(restart_reg_base + (RST_PROT_REG >> 2), 0x52535445); 44 45 /* set software hard reset */ 46 out_be32(restart_reg_base + (RST_CTRL_REG >> 2), 0x2); 47 } else { 48 printk (KERN_EMERG "Error: Restart registers not mapped, spinning!\n"); 49 } 50 51 for (;;) ; 52} 53 54long __init mpc83xx_time_init(void) 55{ 56#define SPCR_OFFSET 0x00000110 57#define SPCR_TBEN 0x00400000 58 __be32 __iomem *spcr = ioremap(get_immrbase() + SPCR_OFFSET, 4); 59 __be32 tmp; 60 61 tmp = in_be32(spcr); 62 out_be32(spcr, tmp | SPCR_TBEN); 63 64 iounmap(spcr); 65 66 return 0; 67} 68