Merge commit 'v2.6.29-rc1' into timers/urgent
[linux-2.6] / 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/bootmem.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 udbg_printf
40 #else
41 #define DBG pr_debug
42 #endif
43
44 /* mutex synchronizing GPU accesses and video mode changes */
45 DEFINE_MUTEX(ps3_gpu_mutex);
46 EXPORT_SYMBOL_GPL(ps3_gpu_mutex);
47
48 #if !defined(CONFIG_SMP)
49 static void smp_send_stop(void) {}
50 #endif
51
52 static union ps3_firmware_version ps3_firmware_version;
53
54 void ps3_get_firmware_version(union ps3_firmware_version *v)
55 {
56         *v = ps3_firmware_version;
57 }
58 EXPORT_SYMBOL_GPL(ps3_get_firmware_version);
59
60 int ps3_compare_firmware_version(u16 major, u16 minor, u16 rev)
61 {
62         union ps3_firmware_version x;
63
64         x.pad = 0;
65         x.major = major;
66         x.minor = minor;
67         x.rev = rev;
68
69         return (ps3_firmware_version.raw > x.raw) -
70                (ps3_firmware_version.raw < x.raw);
71 }
72 EXPORT_SYMBOL_GPL(ps3_compare_firmware_version);
73
74 static void ps3_power_save(void)
75 {
76         /*
77          * lv1_pause() puts the PPE thread into inactive state until an
78          * irq on an unmasked plug exists. MSR[EE] has no effect.
79          * flags: 0 = wake on DEC interrupt, 1 = ignore DEC interrupt.
80          */
81
82         lv1_pause(0);
83 }
84
85 static void ps3_restart(char *cmd)
86 {
87         DBG("%s:%d cmd '%s'\n", __func__, __LINE__, cmd);
88
89         smp_send_stop();
90         ps3_sys_manager_restart(); /* never returns */
91 }
92
93 static void ps3_power_off(void)
94 {
95         DBG("%s:%d\n", __func__, __LINE__);
96
97         smp_send_stop();
98         ps3_sys_manager_power_off(); /* never returns */
99 }
100
101 static void ps3_halt(void)
102 {
103         DBG("%s:%d\n", __func__, __LINE__);
104
105         smp_send_stop();
106         ps3_sys_manager_halt(); /* never returns */
107 }
108
109 static void ps3_panic(char *str)
110 {
111         DBG("%s:%d %s\n", __func__, __LINE__, str);
112
113         smp_send_stop();
114         printk("\n");
115         printk("   System does not reboot automatically.\n");
116         printk("   Please press POWER button.\n");
117         printk("\n");
118
119         while(1)
120                 lv1_pause(1);
121 }
122
123 #if defined(CONFIG_FB_PS3) || defined(CONFIG_FB_PS3_MODULE) || \
124     defined(CONFIG_PS3_FLASH) || defined(CONFIG_PS3_FLASH_MODULE)
125 static void __init prealloc(struct ps3_prealloc *p)
126 {
127         if (!p->size)
128                 return;
129
130         p->address = __alloc_bootmem(p->size, p->align, __pa(MAX_DMA_ADDRESS));
131         if (!p->address) {
132                 printk(KERN_ERR "%s: Cannot allocate %s\n", __func__,
133                        p->name);
134                 return;
135         }
136
137         printk(KERN_INFO "%s: %lu bytes at %p\n", p->name, p->size,
138                p->address);
139 }
140 #endif
141
142 #if defined(CONFIG_FB_PS3) || defined(CONFIG_FB_PS3_MODULE)
143 struct ps3_prealloc ps3fb_videomemory = {
144         .name = "ps3fb videomemory",
145         .size = CONFIG_FB_PS3_DEFAULT_SIZE_M*1024*1024,
146         .align = 1024*1024              /* the GPU requires 1 MiB alignment */
147 };
148 EXPORT_SYMBOL_GPL(ps3fb_videomemory);
149 #define prealloc_ps3fb_videomemory()    prealloc(&ps3fb_videomemory)
150
151 static int __init early_parse_ps3fb(char *p)
152 {
153         if (!p)
154                 return 1;
155
156         ps3fb_videomemory.size = _ALIGN_UP(memparse(p, &p),
157                                            ps3fb_videomemory.align);
158         return 0;
159 }
160 early_param("ps3fb", early_parse_ps3fb);
161 #else
162 #define prealloc_ps3fb_videomemory()    do { } while (0)
163 #endif
164
165 #if defined(CONFIG_PS3_FLASH) || defined(CONFIG_PS3_FLASH_MODULE)
166 struct ps3_prealloc ps3flash_bounce_buffer = {
167         .name = "ps3flash bounce buffer",
168         .size = 256*1024,
169         .align = 256*1024
170 };
171 EXPORT_SYMBOL_GPL(ps3flash_bounce_buffer);
172 #define prealloc_ps3flash_bounce_buffer()       prealloc(&ps3flash_bounce_buffer)
173
174 static int __init early_parse_ps3flash(char *p)
175 {
176         if (!p)
177                 return 1;
178
179         if (!strcmp(p, "off"))
180                 ps3flash_bounce_buffer.size = 0;
181
182         return 0;
183 }
184 early_param("ps3flash", early_parse_ps3flash);
185 #else
186 #define prealloc_ps3flash_bounce_buffer()       do { } while (0)
187 #endif
188
189 static int ps3_set_dabr(u64 dabr)
190 {
191         enum {DABR_USER = 1, DABR_KERNEL = 2,};
192
193         return lv1_set_dabr(dabr, DABR_KERNEL | DABR_USER) ? -1 : 0;
194 }
195
196 static void __init ps3_setup_arch(void)
197 {
198
199         DBG(" -> %s:%d\n", __func__, __LINE__);
200
201         lv1_get_version_info(&ps3_firmware_version.raw);
202         printk(KERN_INFO "PS3 firmware version %u.%u.%u\n",
203                ps3_firmware_version.major, ps3_firmware_version.minor,
204                ps3_firmware_version.rev);
205
206         ps3_spu_set_platform();
207
208 #ifdef CONFIG_SMP
209         smp_init_ps3();
210 #endif
211
212 #ifdef CONFIG_DUMMY_CONSOLE
213         conswitchp = &dummy_con;
214 #endif
215
216         prealloc_ps3fb_videomemory();
217         prealloc_ps3flash_bounce_buffer();
218
219         ppc_md.power_save = ps3_power_save;
220         ps3_os_area_init();
221
222         DBG(" <- %s:%d\n", __func__, __LINE__);
223 }
224
225 static void __init ps3_progress(char *s, unsigned short hex)
226 {
227         printk("*** %04x : %s\n", hex, s ? s : "");
228 }
229
230 static int __init ps3_probe(void)
231 {
232         unsigned long htab_size;
233         unsigned long dt_root;
234
235         DBG(" -> %s:%d\n", __func__, __LINE__);
236
237         dt_root = of_get_flat_dt_root();
238         if (!of_flat_dt_is_compatible(dt_root, "sony,ps3"))
239                 return 0;
240
241         powerpc_firmware_features |= FW_FEATURE_PS3_POSSIBLE;
242
243         ps3_os_area_save_params();
244         ps3_mm_init();
245         ps3_mm_vas_create(&htab_size);
246         ps3_hpte_init(htab_size);
247
248         DBG(" <- %s:%d\n", __func__, __LINE__);
249         return 1;
250 }
251
252 #if defined(CONFIG_KEXEC)
253 static void ps3_kexec_cpu_down(int crash_shutdown, int secondary)
254 {
255         int cpu = smp_processor_id();
256
257         DBG(" -> %s:%d: (%d)\n", __func__, __LINE__, cpu);
258
259         ps3_smp_cleanup_cpu(cpu);
260         ps3_shutdown_IRQ(cpu);
261
262         DBG(" <- %s:%d\n", __func__, __LINE__);
263 }
264 #endif
265
266 define_machine(ps3) {
267         .name                           = "PS3",
268         .probe                          = ps3_probe,
269         .setup_arch                     = ps3_setup_arch,
270         .init_IRQ                       = ps3_init_IRQ,
271         .panic                          = ps3_panic,
272         .get_boot_time                  = ps3_get_boot_time,
273         .set_rtc_time                   = ps3_set_rtc_time,
274         .get_rtc_time                   = ps3_get_rtc_time,
275         .set_dabr                       = ps3_set_dabr,
276         .calibrate_decr                 = ps3_calibrate_decr,
277         .progress                       = ps3_progress,
278         .restart                        = ps3_restart,
279         .power_off                      = ps3_power_off,
280         .halt                           = ps3_halt,
281 #if defined(CONFIG_KEXEC)
282         .kexec_cpu_down                 = ps3_kexec_cpu_down,
283 #endif
284 };