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Linux/arch/powerpc/platforms/ps3/setup.c

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

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