1/* 2 * 3 * arch/xtensa/platform-iss/setup.c 4 * 5 * Platform specific initialization. 6 * 7 * Authors: Chris Zankel <chris@zankel.net> 8 * Joe Taylor <joe@tensilica.com> 9 * 10 * Copyright 2001 - 2005 Tensilica Inc. 11 * 12 * This program is free software; you can redistribute it and/or modify it 13 * under the terms of the GNU General Public License as published by the 14 * Free Software Foundation; either version 2 of the License, or (at your 15 * option) any later version. 16 * 17 */ 18#include <linux/stddef.h> 19#include <linux/kernel.h> 20#include <linux/init.h> 21#include <linux/errno.h> 22#include <linux/reboot.h> 23#include <linux/kdev_t.h> 24#include <linux/types.h> 25#include <linux/major.h> 26#include <linux/blkdev.h> 27#include <linux/console.h> 28#include <linux/delay.h> 29#include <linux/stringify.h> 30#include <linux/notifier.h> 31 32#include <asm/platform.h> 33#include <asm/bootparam.h> 34 35 36void __init platform_init(bp_tag_t* bootparam) 37{ 38 39} 40 41void platform_halt(void) 42{ 43 printk (" ** Called platform_halt(), looping forever! **\n"); 44 while (1); 45} 46 47void platform_power_off(void) 48{ 49 printk (" ** Called platform_power_off(), looping forever! **\n"); 50 while (1); 51} 52void platform_restart(void) 53{ 54 /* Flush and reset the mmu, simulate a processor reset, and 55 * jump to the reset vector. */ 56 57 __asm__ __volatile__("movi a2, 15\n\t" 58 "wsr a2, " __stringify(ICOUNTLEVEL) "\n\t" 59 "movi a2, 0\n\t" 60 "wsr a2, " __stringify(ICOUNT) "\n\t" 61 "wsr a2, " __stringify(IBREAKENABLE) "\n\t" 62 "wsr a2, " __stringify(LCOUNT) "\n\t" 63 "movi a2, 0x1f\n\t" 64 "wsr a2, " __stringify(PS) "\n\t" 65 "isync\n\t" 66 "jx %0\n\t" 67 : 68 : "a" (XCHAL_RESET_VECTOR_VADDR) 69 : "a2"); 70 71 /* control never gets here */ 72} 73 74extern void iss_net_poll(void); 75 76const char twirl[]="|/-\\|/-\\"; 77 78void platform_heartbeat(void) 79{ 80} 81 82 83 84static int 85iss_panic_event(struct notifier_block *this, unsigned long event, void *ptr) 86{ 87 __asm__ __volatile__("movi a2, -1; simcall\n"); 88 return NOTIFY_DONE; 89} 90 91static struct notifier_block iss_panic_block = { 92 iss_panic_event, 93 NULL, 94 0 95}; 96 97void __init platform_setup(char **p_cmdline) 98{ 99 atomic_notifier_chain_register(&panic_notifier_list, &iss_panic_block); 100} 101