arch/powerpc/platforms/powernv/setup.c

   1 /*
   2  * PowerNV setup code.
   3  *
   4  * Copyright 2011 IBM Corp.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  */
  11
  12 #undef DEBUG
  13
  14 #include <linux/cpu.h>
  15 #include <linux/errno.h>
  16 #include <linux/sched.h>
  17 #include <linux/kernel.h>
  18 #include <linux/tty.h>
  19 #include <linux/reboot.h>
  20 #include <linux/init.h>
  21 #include <linux/console.h>
  22 #include <linux/delay.h>
  23 #include <linux/irq.h>
  24 #include <linux/seq_file.h>
  25 #include <linux/of.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/bug.h>
  28
  29 #include <asm/machdep.h>
  30 #include <asm/firmware.h>
  31 #include <asm/xics.h>
  32
  33 #include "powernv.h"
  34
  35 static void __init pnv_setup_arch(void)
  36 {
  37         /* Force console to hvc for now until we have sorted out the
  38          * real console situation for the platform. This will make
  39          * hvc_udbg work at least.
  40          */
  41         add_preferred_console("hvc", 0, NULL);
  42
  43         /* Initialize SMP */
  44         pnv_smp_init();
  45
  46         /* XXX PCI */
  47
  48         /* XXX NVRAM */
  49
  50         /* Enable NAP mode */
  51         powersave_nap = 1;
  52
  53         /* XXX PMCS */
  54 }
  55
  56 static void __init pnv_init_early(void)
  57 {
  58         /* XXX IOMMU */
  59 }
  60
  61 static void __init pnv_init_IRQ(void)
  62 {
  63         xics_init();
  64
  65         WARN_ON(!ppc_md.get_irq);
  66 }
  67
  68 static void pnv_show_cpuinfo(struct seq_file *m)
  69 {
  70         struct device_node *root;
  71         const char *model = "";
  72
  73         root = of_find_node_by_path("/");
  74         if (root)
  75                 model = of_get_property(root, "model", NULL);
  76         seq_printf(m, "machine\t\t: PowerNV %s\n", model);
  77         of_node_put(root);
  78 }
  79
  80 static void pnv_restart(char *cmd)
  81 {
  82         for (;;);
  83 }
  84
  85 static void pnv_power_off(void)
  86 {
  87         for (;;);
  88 }
  89
  90 static void pnv_halt(void)
  91 {
  92         for (;;);
  93 }
  94
  95 static unsigned long __init pnv_get_boot_time(void)
  96 {
  97         return 0;
  98 }
  99
 100 static void pnv_get_rtc_time(struct rtc_time *rtc_tm)
 101 {
 102 }
 103
 104 static int pnv_set_rtc_time(struct rtc_time *tm)
 105 {
 106         return 0;
 107 }
 108
 109 static void pnv_progress(char *s, unsigned short hex)
 110 {
 111 }
 112
 113 #ifdef CONFIG_KEXEC
 114 static void pnv_kexec_cpu_down(int crash_shutdown, int secondary)
 115 {
 116         xics_kexec_teardown_cpu(secondary);
 117 }
 118 #endif /* CONFIG_KEXEC */
 119
 120 static int __init pnv_probe(void)
 121 {
 122         unsigned long root = of_get_flat_dt_root();
 123
 124         if (!of_flat_dt_is_compatible(root, "ibm,powernv"))
 125                 return 0;
 126
 127         hpte_init_native();
 128
 129         pr_debug("PowerNV detected !\n");
 130
 131         return 1;
 132 }
 133
 134 define_machine(powernv) {
 135         .name                   = "PowerNV",
 136         .probe                  = pnv_probe,
 137         .setup_arch             = pnv_setup_arch,
 138         .init_early             = pnv_init_early,
 139         .init_IRQ               = pnv_init_IRQ,
 140         .show_cpuinfo           = pnv_show_cpuinfo,
 141         .restart                = pnv_restart,
 142         .power_off              = pnv_power_off,
 143         .halt                   = pnv_halt,
 144         .get_boot_time          = pnv_get_boot_time,
 145         .get_rtc_time           = pnv_get_rtc_time,
 146         .set_rtc_time           = pnv_set_rtc_time,
 147         .progress               = pnv_progress,
 148         .power_save             = power7_idle,
 149         .calibrate_decr         = generic_calibrate_decr,
 150 #ifdef CONFIG_KEXEC
 151         .kexec_cpu_down         = pnv_kexec_cpu_down,
 152 #endif
 153 };