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/memblock.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 41 void __init platform_init(bp_tag_t* bootparam) 42 { 43 } 44 45 void platform_halt(void) 46 { 47 pr_info(" ** Called platform_halt() **\n"); 48 simc_exit(0); 49 } 50 51 void platform_power_off(void) 52 { 53 pr_info(" ** Called platform_power_off() **\n"); 54 simc_exit(0); 55 } 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 64 void platform_heartbeat(void) 65 { 66 } 67 68 static int 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 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