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 21 void mpc83xx_restart(char *cmd) 22 { 23 #define RST_OFFSET 0x00000900 24 #define RST_PROT_REG 0x00000018 25 #define RST_CTRL_REG 0x0000001c 26 __be32 __iomem *reg; 27 28 /* map reset register space */ 29 reg = ioremap(get_immrbase() + 0x900, 0xff); 30 31 local_irq_disable(); 32 33 /* enable software reset "RSTE" */ 34 out_be32(reg + (RST_PROT_REG >> 2), 0x52535445); 35 36 /* set software hard reset */ 37 out_be32(reg + (RST_CTRL_REG >> 2), 0x2); 38 for (;;) ; 39 } 40 41 long __init mpc83xx_time_init(void) 42 { 43 #define SPCR_OFFSET 0x00000110 44 #define SPCR_TBEN 0x00400000 45 __be32 __iomem *spcr = ioremap(get_immrbase() + SPCR_OFFSET, 4); 46 __be32 tmp; 47 48 tmp = in_be32(spcr); 49 out_be32(spcr, tmp | SPCR_TBEN); 50 51 iounmap(spcr); 52 53 return 0; 54 } 55