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 #include <asm/opal.h>
  33
  34 #include "powernv.h"
  35
  36 static void __init pnv_setup_arch(void)
  37 {
  38         /* Initialize SMP */
  39         pnv_smp_init();
  40
  41         /* XXX PCI */
  42
  43         /* XXX NVRAM */
  44
  45         /* Enable NAP mode */
  46         powersave_nap = 1;
  47
  48         /* XXX PMCS */
  49 }
  50
  51 static void __init pnv_init_early(void)
  52 {
  53 #ifdef CONFIG_HVC_OPAL
  54         if (firmware_has_feature(FW_FEATURE_OPAL))
  55                 hvc_opal_init_early();
  56         else
  57 #endif
  58                 add_preferred_console("hvc", 0, NULL);
  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         if (firmware_has_feature(FW_FEATURE_OPALv2))
  78                 seq_printf(m, "firmware\t: OPAL v2\n");
  79         else if (firmware_has_feature(FW_FEATURE_OPAL))
  80                 seq_printf(m, "firmware\t: OPAL v1\n");
  81         else
  82                 seq_printf(m, "firmware\t: BML\n");
  83         of_node_put(root);
  84 }
  85
  86 static void pnv_restart(char *cmd)
  87 {
  88         for (;;);
  89 }
  90
  91 static void pnv_power_off(void)
  92 {
  93         for (;;);
  94 }
  95
  96 static void pnv_halt(void)
  97 {
  98         for (;;);
  99 }
 100
 101 static unsigned long __init pnv_get_boot_time(void)
 102 {
 103         return 0;
 104 }
 105
 106 static void pnv_get_rtc_time(struct rtc_time *rtc_tm)
 107 {
 108 }
 109
 110 static int pnv_set_rtc_time(struct rtc_time *tm)
 111 {
 112         return 0;
 113 }
 114
 115 static void pnv_progress(char *s, unsigned short hex)
 116 {
 117 }
 118
 119 #ifdef CONFIG_KEXEC
 120 static void pnv_kexec_cpu_down(int crash_shutdown, int secondary)
 121 {
 122         xics_kexec_teardown_cpu(secondary);
 123 }
 124 #endif /* CONFIG_KEXEC */
 125
 126 static int __init pnv_probe(void)
 127 {
 128         unsigned long root = of_get_flat_dt_root();
 129
 130         if (!of_flat_dt_is_compatible(root, "ibm,powernv"))
 131                 return 0;
 132
 133         hpte_init_native();
 134
 135         pr_debug("PowerNV detected !\n");
 136
 137         return 1;
 138 }
 139
 140 define_machine(powernv) {
 141         .name                   = "PowerNV",
 142         .probe                  = pnv_probe,
 143         .setup_arch             = pnv_setup_arch,
 144         .init_early             = pnv_init_early,
 145         .init_IRQ               = pnv_init_IRQ,
 146         .show_cpuinfo           = pnv_show_cpuinfo,
 147         .restart                = pnv_restart,
 148         .power_off              = pnv_power_off,
 149         .halt                   = pnv_halt,
 150         .get_boot_time          = pnv_get_boot_time,
 151         .get_rtc_time           = pnv_get_rtc_time,
 152         .set_rtc_time           = pnv_set_rtc_time,
 153         .progress               = pnv_progress,
 154         .power_save             = power7_idle,
 155         .calibrate_decr         = generic_calibrate_decr,
 156 #ifdef CONFIG_KEXEC
 157         .kexec_cpu_down         = pnv_kexec_cpu_down,
 158 #endif
 159 };