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
platform_init(bp_tag_t * bootparam)36 void __init platform_init(bp_tag_t* bootparam)
37 {
38
39 }
40
platform_halt(void)41 void platform_halt(void)
42 {
43 pr_info(" ** Called platform_halt() **\n");
44 __asm__ __volatile__("movi a2, 1\nsimcall\n");
45 }
46
platform_power_off(void)47 void platform_power_off(void)
48 {
49 pr_info(" ** Called platform_power_off() **\n");
50 __asm__ __volatile__("movi a2, 1\nsimcall\n");
51 }
platform_restart(void)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
platform_heartbeat(void)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
iss_panic_event(struct notifier_block * this,unsigned long event,void * ptr)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
platform_setup(char ** p_cmdline)111 void __init platform_setup(char **p_cmdline)
112 {
113 atomic_notifier_chain_register(&panic_notifier_list, &iss_panic_block);
114 }
115