68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
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/*
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* misc setup functions for MPC83xx
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*
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* Maintainer: Kumar Gala <galak@kernel.crashing.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/stddef.h>
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#include <linux/kernel.h>
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#include <asm/io.h>
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#include <asm/hw_irq.h>
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#include <sysdev/fsl_soc.h>
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#include "mpc83xx.h"
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static __be32 __iomem *restart_reg_base;
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static int __init mpc83xx_restart_init(void)
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{
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/* map reset restart_reg_baseister space */
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restart_reg_base = ioremap(get_immrbase() + 0x900, 0xff);
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return 0;
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}
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arch_initcall(mpc83xx_restart_init);
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void mpc83xx_restart(char *cmd)
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{
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#define RST_OFFSET 0x00000900
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#define RST_PROT_REG 0x00000018
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#define RST_CTRL_REG 0x0000001c
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local_irq_disable();
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if (restart_reg_base) {
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/* enable software reset "RSTE" */
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out_be32(restart_reg_base + (RST_PROT_REG >> 2), 0x52535445);
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/* set software hard reset */
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out_be32(restart_reg_base + (RST_CTRL_REG >> 2), 0x2);
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} else {
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printk (KERN_EMERG "Error: Restart registers not mapped, spinning!\n");
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}
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for (;;) ;
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}
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long __init mpc83xx_time_init(void)
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{
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#define SPCR_OFFSET 0x00000110
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#define SPCR_TBEN 0x00400000
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__be32 __iomem *spcr = ioremap(get_immrbase() + SPCR_OFFSET, 4);
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__be32 tmp;
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tmp = in_be32(spcr);
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out_be32(spcr, tmp | SPCR_TBEN);
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iounmap(spcr);
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return 0;
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}
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