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 36 void __init platform_init(bp_tag_t* bootparam) 37 { 38 39 } 40 41 void platform_halt(void) 42 { 43 pr_info(" ** Called platform_halt() **\n"); 44 __asm__ __volatile__("movi a2, 1\nsimcall\n"); 45 } 46 47 void platform_power_off(void) 48 { 49 pr_info(" ** Called platform_power_off() **\n"); 50 __asm__ __volatile__("movi a2, 1\nsimcall\n"); 51 } 52 void 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, icountlevel\n\t" 59 "movi a2, 0\n\t" 60 "wsr a2, icount\n\t" 61 #if XCHAL_NUM_IBREAK > 0 62 "wsr a2, ibreakenable\n\t" 63 #endif 64 #if XCHAL_HAVE_LOOPS 65 "wsr a2, lcount\n\t" 66 #endif 67 "movi a2, 0x1f\n\t" 68 "wsr a2, ps\n\t" 69 "isync\n\t" 70 "jx %0\n\t" 71 : 72 : "a" (XCHAL_RESET_VECTOR_VADDR) 73 : "a2"); 74 75 /* control never gets here */ 76 } 77 78 extern void iss_net_poll(void); 79 80 const char twirl[]="|/-\\|/-\\"; 81 82 void platform_heartbeat(void) 83 { 84 #if 0 85 static int i = 0, j = 0; 86 87 if (--i < 0) { 88 i = 99; 89 printk("\r%c\r", twirl[j++]); 90 if (j == 8) 91 j = 0; 92 } 93 #endif 94 } 95 96 97 98 static int 99 iss_panic_event(struct notifier_block *this, unsigned long event, void *ptr) 100 { 101 __asm__ __volatile__("movi a2, -1; simcall\n"); 102 return NOTIFY_DONE; 103 } 104 105 static struct notifier_block iss_panic_block = { 106 iss_panic_event, 107 NULL, 108 0 109 }; 110 111 void __init platform_setup(char **p_cmdline) 112 { 113 atomic_notifier_chain_register(&panic_notifier_list, &iss_panic_block); 114 } 115