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