1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * arch/xtensa/platform-iss/setup.c
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * Platform specific initialization.
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * Authors: Chris Zankel <chris@zankel.net>
9*4882a593Smuzhiyun * Joe Taylor <joe@tensilica.com>
10*4882a593Smuzhiyun *
11*4882a593Smuzhiyun * Copyright 2001 - 2005 Tensilica Inc.
12*4882a593Smuzhiyun * Copyright 2017 Cadence Design Systems Inc.
13*4882a593Smuzhiyun */
14*4882a593Smuzhiyun #include <linux/init.h>
15*4882a593Smuzhiyun #include <linux/kernel.h>
16*4882a593Smuzhiyun #include <linux/notifier.h>
17*4882a593Smuzhiyun #include <linux/printk.h>
18*4882a593Smuzhiyun #include <linux/string.h>
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun #include <asm/platform.h>
21*4882a593Smuzhiyun #include <asm/setup.h>
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun #include <platform/simcall.h>
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun
platform_halt(void)26*4882a593Smuzhiyun void platform_halt(void)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun pr_info(" ** Called platform_halt() **\n");
29*4882a593Smuzhiyun simc_exit(0);
30*4882a593Smuzhiyun }
31*4882a593Smuzhiyun
platform_power_off(void)32*4882a593Smuzhiyun void platform_power_off(void)
33*4882a593Smuzhiyun {
34*4882a593Smuzhiyun pr_info(" ** Called platform_power_off() **\n");
35*4882a593Smuzhiyun simc_exit(0);
36*4882a593Smuzhiyun }
37*4882a593Smuzhiyun
platform_restart(void)38*4882a593Smuzhiyun void platform_restart(void)
39*4882a593Smuzhiyun {
40*4882a593Smuzhiyun /* Flush and reset the mmu, simulate a processor reset, and
41*4882a593Smuzhiyun * jump to the reset vector. */
42*4882a593Smuzhiyun cpu_reset();
43*4882a593Smuzhiyun /* control never gets here */
44*4882a593Smuzhiyun }
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun static int
iss_panic_event(struct notifier_block * this,unsigned long event,void * ptr)47*4882a593Smuzhiyun iss_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
48*4882a593Smuzhiyun {
49*4882a593Smuzhiyun simc_exit(1);
50*4882a593Smuzhiyun return NOTIFY_DONE;
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun static struct notifier_block iss_panic_block = {
54*4882a593Smuzhiyun .notifier_call = iss_panic_event,
55*4882a593Smuzhiyun };
56*4882a593Smuzhiyun
platform_setup(char ** p_cmdline)57*4882a593Smuzhiyun void __init platform_setup(char **p_cmdline)
58*4882a593Smuzhiyun {
59*4882a593Smuzhiyun static void *argv[COMMAND_LINE_SIZE / sizeof(void *)] __initdata;
60*4882a593Smuzhiyun static char cmdline[COMMAND_LINE_SIZE] __initdata;
61*4882a593Smuzhiyun int argc = simc_argc();
62*4882a593Smuzhiyun int argv_size = simc_argv_size();
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun if (argc > 1) {
65*4882a593Smuzhiyun if (argv_size > sizeof(argv)) {
66*4882a593Smuzhiyun pr_err("%s: command line too long: argv_size = %d\n",
67*4882a593Smuzhiyun __func__, argv_size);
68*4882a593Smuzhiyun } else {
69*4882a593Smuzhiyun int i;
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun cmdline[0] = 0;
72*4882a593Smuzhiyun simc_argv((void *)argv);
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun for (i = 1; i < argc; ++i) {
75*4882a593Smuzhiyun if (i > 1)
76*4882a593Smuzhiyun strcat(cmdline, " ");
77*4882a593Smuzhiyun strcat(cmdline, argv[i]);
78*4882a593Smuzhiyun }
79*4882a593Smuzhiyun *p_cmdline = cmdline;
80*4882a593Smuzhiyun }
81*4882a593Smuzhiyun }
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun atomic_notifier_chain_register(&panic_notifier_list, &iss_panic_block);
84*4882a593Smuzhiyun }
85