arch/powerpc/platforms/ps3/setup.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  PS3 platform setup routines.
   4  *
   5  *  Copyright (C) 2006 Sony Computer Entertainment Inc.
   6  *  Copyright 2006 Sony Corp.
   7  */
   8
   9 #include <linux/kernel.h>
  10 #include <linux/delay.h>
  11 #include <linux/fs.h>
  12 #include <linux/root_dev.h>
  13 #include <linux/console.h>
  14 #include <linux/export.h>
  15 #include <linux/memblock.h>
  16 #include <linux/of.h>
  17
  18 #include <asm/machdep.h>
  19 #include <asm/firmware.h>
  20 #include <asm/time.h>
  21 #include <asm/iommu.h>
  22 #include <asm/udbg.h>
  23 #include <asm/lv1call.h>
  24 #include <asm/ps3gpu.h>
  25
  26 #include "platform.h"
  27
  28 #if defined(DEBUG)
  29 #define DBG udbg_printf
  30 #else
  31 #define DBG pr_debug
  32 #endif
  33
  34 /* mutex synchronizing GPU accesses and video mode changes */
  35 DEFINE_MUTEX(ps3_gpu_mutex);
  36 EXPORT_SYMBOL_GPL(ps3_gpu_mutex);
  37
  38 static union ps3_firmware_version ps3_firmware_version;
  39 static char ps3_firmware_version_str[16];
  40
  41 void ps3_get_firmware_version(union ps3_firmware_version *v)
  42 {
  43         *v = ps3_firmware_version;
  44 }
  45 EXPORT_SYMBOL_GPL(ps3_get_firmware_version);
  46
  47 int ps3_compare_firmware_version(u16 major, u16 minor, u16 rev)
  48 {
  49         union ps3_firmware_version x;
  50
  51         x.pad = 0;
  52         x.major = major;
  53         x.minor = minor;
  54         x.rev = rev;
  55
  56         return (ps3_firmware_version.raw > x.raw) -
  57                (ps3_firmware_version.raw < x.raw);
  58 }
  59 EXPORT_SYMBOL_GPL(ps3_compare_firmware_version);
  60
  61 static void ps3_power_save(void)
  62 {
  63         /*
  64          * lv1_pause() puts the PPE thread into inactive state until an
  65          * irq on an unmasked plug exists. MSR[EE] has no effect.
  66          * flags: 0 = wake on DEC interrupt, 1 = ignore DEC interrupt.
  67          */
  68
  69         lv1_pause(0);
  70 }
  71
  72 static void __noreturn ps3_restart(char *cmd)
  73 {
  74         DBG("%s:%d cmd '%s'\n", __func__, __LINE__, cmd);
  75
  76         smp_send_stop();
  77         ps3_sys_manager_restart(); /* never returns */
  78 }
  79
  80 static void ps3_power_off(void)
  81 {
  82         DBG("%s:%d\n", __func__, __LINE__);
  83
  84         smp_send_stop();
  85         ps3_sys_manager_power_off(); /* never returns */
  86 }
  87
  88 static void __noreturn ps3_halt(void)
  89 {
  90         DBG("%s:%d\n", __func__, __LINE__);
  91
  92         smp_send_stop();
  93         ps3_sys_manager_halt(); /* never returns */
  94 }
  95
  96 static void ps3_panic(char *str)
  97 {
  98         DBG("%s:%d %s\n", __func__, __LINE__, str);
  99
 100         smp_send_stop();
 101         printk("\n");
 102         printk("   System does not reboot automatically.\n");
 103         printk("   Please press POWER button.\n");
 104         printk("\n");
 105         panic_flush_kmsg_end();
 106
 107         while(1)
 108                 lv1_pause(1);
 109 }
 110
 111 #if defined(CONFIG_FB_PS3) || defined(CONFIG_FB_PS3_MODULE) || \
 112     defined(CONFIG_PS3_FLASH) || defined(CONFIG_PS3_FLASH_MODULE)
 113 static void __init prealloc(struct ps3_prealloc *p)
 114 {
 115         if (!p->size)
 116                 return;
 117
 118         p->address = memblock_alloc_or_panic(p->size, p->align);
 119
 120         printk(KERN_INFO "%s: %lu bytes at %p\n", p->name, p->size,
 121                p->address);
 122 }
 123 #endif
 124
 125 #if defined(CONFIG_FB_PS3) || defined(CONFIG_FB_PS3_MODULE)
 126 struct ps3_prealloc ps3fb_videomemory = {
 127         .name = "ps3fb videomemory",
 128         .size = CONFIG_FB_PS3_DEFAULT_SIZE_M*1024*1024,
 129         .align = 1024*1024              /* the GPU requires 1 MiB alignment */
 130 };
 131 EXPORT_SYMBOL_GPL(ps3fb_videomemory);
 132 #define prealloc_ps3fb_videomemory()    prealloc(&ps3fb_videomemory)
 133
 134 static int __init early_parse_ps3fb(char *p)
 135 {
 136         if (!p)
 137                 return 1;
 138
 139         ps3fb_videomemory.size = ALIGN(memparse(p, &p),
 140                                            ps3fb_videomemory.align);
 141         return 0;
 142 }
 143 early_param("ps3fb", early_parse_ps3fb);
 144 #else
 145 #define prealloc_ps3fb_videomemory()    do { } while (0)
 146 #endif
 147
 148 #if defined(CONFIG_PS3_FLASH) || defined(CONFIG_PS3_FLASH_MODULE)
 149 struct ps3_prealloc ps3flash_bounce_buffer = {
 150         .name = "ps3flash bounce buffer",
 151         .size = 256*1024,
 152         .align = 256*1024
 153 };
 154 EXPORT_SYMBOL_GPL(ps3flash_bounce_buffer);
 155 #define prealloc_ps3flash_bounce_buffer()       prealloc(&ps3flash_bounce_buffer)
 156
 157 static int __init early_parse_ps3flash(char *p)
 158 {
 159         if (!p)
 160                 return 1;
 161
 162         if (!strcmp(p, "off"))
 163                 ps3flash_bounce_buffer.size = 0;
 164
 165         return 0;
 166 }
 167 early_param("ps3flash", early_parse_ps3flash);
 168 #else
 169 #define prealloc_ps3flash_bounce_buffer()       do { } while (0)
 170 #endif
 171
 172 static int ps3_set_dabr(unsigned long dabr, unsigned long dabrx)
 173 {
 174         /* Have to set at least one bit in the DABRX */
 175         if (dabrx == 0 && dabr == 0)
 176                 dabrx = DABRX_USER;
 177         /* hypervisor only allows us to set BTI, Kernel and user */
 178         dabrx &= DABRX_BTI | DABRX_KERNEL | DABRX_USER;
 179
 180         return lv1_set_dabr(dabr, dabrx) ? -1 : 0;
 181 }
 182
 183 static ssize_t ps3_fw_version_show(struct kobject *kobj,
 184         struct kobj_attribute *attr, char *buf)
 185 {
 186         return sprintf(buf, "%s", ps3_firmware_version_str);
 187 }
 188
 189 static int __init ps3_setup_sysfs(void)
 190 {
 191         static struct kobj_attribute attr = __ATTR(fw-version, S_IRUGO,
 192                 ps3_fw_version_show, NULL);
 193         static struct kobject *kobj;
 194         int result;
 195
 196         kobj = kobject_create_and_add("ps3", firmware_kobj);
 197
 198         if (!kobj) {
 199                 pr_warn("%s:%d: kobject_create_and_add failed.\n", __func__,
 200                         __LINE__);
 201                 return -ENOMEM;
 202         }
 203
 204         result = sysfs_create_file(kobj, &attr.attr);
 205
 206         if (result) {
 207                 pr_warn("%s:%d: sysfs_create_file failed.\n", __func__,
 208                         __LINE__);
 209                 kobject_put(kobj);
 210                 return -ENOMEM;
 211         }
 212
 213         return 0;
 214 }
 215 core_initcall(ps3_setup_sysfs);
 216
 217 static void __init ps3_setup_arch(void)
 218 {
 219         u64 tmp;
 220
 221         DBG(" -> %s:%d\n", __func__, __LINE__);
 222
 223         lv1_get_version_info(&ps3_firmware_version.raw, &tmp);
 224
 225         snprintf(ps3_firmware_version_str, sizeof(ps3_firmware_version_str),
 226                 "%u.%u.%u", ps3_firmware_version.major,
 227                 ps3_firmware_version.minor, ps3_firmware_version.rev);
 228
 229         printk(KERN_INFO "PS3 firmware version %s\n", ps3_firmware_version_str);
 230
 231         ps3_spu_set_platform();
 232
 233 #ifdef CONFIG_SMP
 234         smp_init_ps3();
 235 #endif
 236
 237         prealloc_ps3fb_videomemory();
 238         prealloc_ps3flash_bounce_buffer();
 239
 240         ppc_md.power_save = ps3_power_save;
 241         ps3_os_area_init();
 242
 243         DBG(" <- %s:%d\n", __func__, __LINE__);
 244 }
 245
 246 static void __init ps3_progress(char *s, unsigned short hex)
 247 {
 248         printk("*** %04x : %s\n", hex, s ? s : "");
 249 }
 250
 251 void __init ps3_early_mm_init(void)
 252 {
 253         unsigned long htab_size;
 254
 255         ps3_mm_init();
 256         ps3_mm_vas_create(&htab_size);
 257         ps3_hpte_init(htab_size);
 258 }
 259
 260 static int __init ps3_probe(void)
 261 {
 262         DBG(" -> %s:%d\n", __func__, __LINE__);
 263
 264         ps3_os_area_save_params();
 265
 266         pm_power_off = ps3_power_off;
 267
 268         DBG(" <- %s:%d\n", __func__, __LINE__);
 269         return 1;
 270 }
 271
 272 #if defined(CONFIG_KEXEC_CORE)
 273 static void ps3_kexec_cpu_down(int crash_shutdown, int secondary)
 274 {
 275         int cpu = smp_processor_id();
 276
 277         DBG(" -> %s:%d: (%d)\n", __func__, __LINE__, cpu);
 278
 279         ps3_smp_cleanup_cpu(cpu);
 280         ps3_shutdown_IRQ(cpu);
 281
 282         DBG(" <- %s:%d\n", __func__, __LINE__);
 283 }
 284 #endif
 285
 286 define_machine(ps3) {
 287         .name                           = "PS3",
 288         .compatible                     = "sony,ps3",
 289         .probe                          = ps3_probe,
 290         .setup_arch                     = ps3_setup_arch,
 291         .init_IRQ                       = ps3_init_IRQ,
 292         .panic                          = ps3_panic,
 293         .get_boot_time                  = ps3_get_boot_time,
 294         .set_dabr                       = ps3_set_dabr,
 295         .calibrate_decr                 = ps3_calibrate_decr,
 296         .progress                       = ps3_progress,
 297         .restart                        = ps3_restart,
 298         .halt                           = ps3_halt,
 299 #if defined(CONFIG_KEXEC_CORE)
 300         .kexec_cpu_down                 = ps3_kexec_cpu_down,
 301 #endif
 302 };