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 * Copyright 2017 Cadence Design Systems Inc.
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18 */
19 #include <linux/bootmem.h>
20 #include <linux/stddef.h>
21 #include <linux/kernel.h>
22 #include <linux/init.h>
23 #include <linux/errno.h>
24 #include <linux/reboot.h>
25 #include <linux/kdev_t.h>
26 #include <linux/types.h>
27 #include <linux/major.h>
28 #include <linux/blkdev.h>
29 #include <linux/console.h>
30 #include <linux/delay.h>
31 #include <linux/stringify.h>
32 #include <linux/notifier.h>
33
34 #include <asm/platform.h>
35 #include <asm/bootparam.h>
36 #include <asm/setup.h>
37
38 #include <platform/simcall.h>
39
40
platform_init(bp_tag_t * bootparam)41 void __init platform_init(bp_tag_t* bootparam)
42 {
43 }
44
platform_halt(void)45 void platform_halt(void)
46 {
47 pr_info(" ** Called platform_halt() **\n");
48 simc_exit(0);
49 }
50
platform_power_off(void)51 void platform_power_off(void)
52 {
53 pr_info(" ** Called platform_power_off() **\n");
54 simc_exit(0);
55 }
platform_restart(void)56 void platform_restart(void)
57 {
58 /* Flush and reset the mmu, simulate a processor reset, and
59 * jump to the reset vector. */
60 cpu_reset();
61 /* control never gets here */
62 }
63
platform_heartbeat(void)64 void platform_heartbeat(void)
65 {
66 }
67
68 static int
iss_panic_event(struct notifier_block * this,unsigned long event,void * ptr)69 iss_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
70 {
71 simc_exit(1);
72 return NOTIFY_DONE;
73 }
74
75 static struct notifier_block iss_panic_block = {
76 .notifier_call = iss_panic_event,
77 };
78
platform_setup(char ** p_cmdline)79 void __init platform_setup(char **p_cmdline)
80 {
81 static void *argv[COMMAND_LINE_SIZE / sizeof(void *)] __initdata;
82 static char cmdline[COMMAND_LINE_SIZE] __initdata;
83 int argc = simc_argc();
84 int argv_size = simc_argv_size();
85
86 if (argc > 1) {
87 if (argv_size > sizeof(argv)) {
88 pr_err("%s: command line too long: argv_size = %d\n",
89 __func__, argv_size);
90 } else {
91 int i;
92
93 cmdline[0] = 0;
94 simc_argv((void *)argv);
95
96 for (i = 1; i < argc; ++i) {
97 if (i > 1)
98 strcat(cmdline, " ");
99 strcat(cmdline, argv[i]);
100 }
101 *p_cmdline = cmdline;
102 }
103 }
104
105 atomic_notifier_chain_register(&panic_notifier_list, &iss_panic_block);
106 }
107
