arch/powerpc/platforms/ps3/setup.c

   1 /*
   2  *  PS3 platform setup routines.
   3  *
   4  *  Copyright (C) 2006 Sony Computer Entertainment Inc.
   5  *  Copyright 2006 Sony Corp.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; version 2 of the License.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <linux/kernel.h>
  22 #include <linux/delay.h>
  23 #include <linux/fs.h>
  24 #include <linux/root_dev.h>
  25 #include <linux/console.h>
  26 #include <linux/kexec.h>
  27
  28 #include <asm/machdep.h>
  29 #include <asm/firmware.h>
  30 #include <asm/time.h>
  31 #include <asm/iommu.h>
  32 #include <asm/udbg.h>
  33 #include <asm/prom.h>
  34 #include <asm/lv1call.h>
  35
  36 #include "platform.h"
  37
  38 #if defined(DEBUG)
  39 #define DBG(fmt...) udbg_printf(fmt)
  40 #else
  41 #define DBG(fmt...) do{if(0)printk(fmt);}while(0)
  42 #endif
  43
  44 static void ps3_show_cpuinfo(struct seq_file *m)
  45 {
  46         seq_printf(m, "machine\t\t: %s\n", ppc_md.name);
  47 }
  48
  49 static void ps3_power_save(void)
  50 {
  51         /*
  52          * lv1_pause() puts the PPE thread into inactive state until an
  53          * irq on an unmasked plug exists. MSR[EE] has no effect.
  54          * flags: 0 = wake on DEC interrupt, 1 = ignore DEC interrupt.
  55          */
  56
  57         lv1_pause(0);
  58 }
  59
  60 static void ps3_panic(char *str)
  61 {
  62         DBG("%s:%d %s\n", __func__, __LINE__, str);
  63
  64 #ifdef CONFIG_SMP
  65         smp_send_stop();
  66 #endif
  67         printk("\n");
  68         printk("   System does not reboot automatically.\n");
  69         printk("   Please press POWER button.\n");
  70         printk("\n");
  71
  72         for (;;) ;
  73 }
  74
  75 static void __init ps3_setup_arch(void)
  76 {
  77         DBG(" -> %s:%d\n", __func__, __LINE__);
  78
  79         ps3_spu_set_platform();
  80         ps3_map_htab();
  81
  82 #ifdef CONFIG_SMP
  83         smp_init_ps3();
  84 #endif
  85
  86 #ifdef CONFIG_DUMMY_CONSOLE
  87         conswitchp = &dummy_con;
  88 #endif
  89
  90         ppc_md.power_save = ps3_power_save;
  91
  92         DBG(" <- %s:%d\n", __func__, __LINE__);
  93 }
  94
  95 static void __init ps3_progress(char *s, unsigned short hex)
  96 {
  97         printk("*** %04x : %s\n", hex, s ? s : "");
  98 }
  99
 100 static int __init ps3_probe(void)
 101 {
 102         unsigned long htab_size;
 103         unsigned long dt_root;
 104
 105         DBG(" -> %s:%d\n", __func__, __LINE__);
 106
 107         dt_root = of_get_flat_dt_root();
 108         if (!of_flat_dt_is_compatible(dt_root, "PS3"))
 109                 return 0;
 110
 111         powerpc_firmware_features |= FW_FEATURE_PS3_POSSIBLE;
 112
 113         ps3_os_area_init();
 114         ps3_mm_init();
 115         ps3_mm_vas_create(&htab_size);
 116         ps3_hpte_init(htab_size);
 117
 118         DBG(" <- %s:%d\n", __func__, __LINE__);
 119         return 1;
 120 }
 121
 122 #if defined(CONFIG_KEXEC)
 123 static void ps3_kexec_cpu_down(int crash_shutdown, int secondary)
 124 {
 125         DBG(" -> %s:%d\n", __func__, __LINE__);
 126
 127         if (secondary) {
 128                 int cpu;
 129                 for_each_online_cpu(cpu)
 130                         if (cpu)
 131                                 ps3_smp_cleanup_cpu(cpu);
 132         } else
 133                 ps3_smp_cleanup_cpu(0);
 134
 135         DBG(" <- %s:%d\n", __func__, __LINE__);
 136 }
 137
 138 static void ps3_machine_kexec(struct kimage *image)
 139 {
 140         unsigned long ppe_id;
 141
 142         DBG(" -> %s:%d\n", __func__, __LINE__);
 143
 144         lv1_get_logical_ppe_id(&ppe_id);
 145         lv1_configure_irq_state_bitmap(ppe_id, 0, 0);
 146         ps3_mm_shutdown();
 147         ps3_mm_vas_destroy();
 148
 149         default_machine_kexec(image);
 150
 151         DBG(" <- %s:%d\n", __func__, __LINE__);
 152 }
 153 #endif
 154
 155 define_machine(ps3) {
 156         .name                           = "PS3",
 157         .probe                          = ps3_probe,
 158         .setup_arch                     = ps3_setup_arch,
 159         .show_cpuinfo                   = ps3_show_cpuinfo,
 160         .init_IRQ                       = ps3_init_IRQ,
 161         .panic                          = ps3_panic,
 162         .get_boot_time                  = ps3_get_boot_time,
 163         .set_rtc_time                   = ps3_set_rtc_time,
 164         .get_rtc_time                   = ps3_get_rtc_time,
 165         .calibrate_decr                 = ps3_calibrate_decr,
 166         .progress                       = ps3_progress,
 167 #if defined(CONFIG_KEXEC)
 168         .kexec_cpu_down                 = ps3_kexec_cpu_down,
 169         .machine_kexec                  = ps3_machine_kexec,
 170         .machine_kexec_prepare          = default_machine_kexec_prepare,
 171         .machine_crash_shutdown         = default_machine_crash_shutdown,
 172 #endif
 173 };