LXR linux/arch/xtensa/platforms/iss/setup.c

   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
  41void __init platform_init(bp_tag_t* bootparam)
  42{
  43}
  44
  45void platform_halt(void)
  46{
  47        pr_info(" ** Called platform_halt() **\n");
  48        simc_exit(0);
  49}
  50
  51void platform_power_off(void)
  52{
  53        pr_info(" ** Called platform_power_off() **\n");
  54        simc_exit(0);
  55}
  56void 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
  64void platform_heartbeat(void)
  65{
  66}
  67
  68static int
  69iss_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
  70{
  71        simc_exit(1);
  72        return NOTIFY_DONE;
  73}
  74
  75static struct notifier_block iss_panic_block = {
  76        .notifier_call = iss_panic_event,
  77};
  78
  79void __init platform_setup(char **p_cmdline)
  80{
  81        int argc = simc_argc();
  82        int argv_size = simc_argv_size();
  83
  84        if (argc > 1) {
  85                void **argv = alloc_bootmem(argv_size);
  86                char *cmdline = alloc_bootmem(argv_size);
  87                int i;
  88
  89                cmdline[0] = 0;
  90                simc_argv((void *)argv);
  91
  92                for (i = 1; i < argc; ++i) {
  93                        if (i > 1)
  94                                strcat(cmdline, " ");
  95                        strcat(cmdline, argv[i]);
  96                }
  97                *p_cmdline = cmdline;
  98        }
  99
 100        atomic_notifier_chain_register(&panic_notifier_list, &iss_panic_block);
 101}
 102