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/bootmem.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 
ps3_get_firmware_version(union ps3_firmware_version * v)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 
ps3_compare_firmware_version(u16 major,u16 minor,u16 rev)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 
ps3_power_save(void)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 
ps3_restart(char * cmd)83 static void 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 
ps3_power_off(void)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 
ps3_halt(void)99 static void 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 
ps3_panic(char * str)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 
117 	while(1)
118 		lv1_pause(1);
119 }
120 
121 #if defined(CONFIG_FB_PS3) || defined(CONFIG_FB_PS3_MODULE) || \
122     defined(CONFIG_PS3_FLASH) || defined(CONFIG_PS3_FLASH_MODULE)
prealloc(struct ps3_prealloc * p)123 static void __init prealloc(struct ps3_prealloc *p)
124 {
125 	if (!p->size)
126 		return;
127 
128 	p->address = __alloc_bootmem(p->size, p->align, __pa(MAX_DMA_ADDRESS));
129 	if (!p->address) {
130 		printk(KERN_ERR "%s: Cannot allocate %s\n", __func__,
131 		       p->name);
132 		return;
133 	}
134 
135 	printk(KERN_INFO "%s: %lu bytes at %p\n", p->name, p->size,
136 	       p->address);
137 }
138 #endif
139 
140 #if defined(CONFIG_FB_PS3) || defined(CONFIG_FB_PS3_MODULE)
141 struct ps3_prealloc ps3fb_videomemory = {
142 	.name = "ps3fb videomemory",
143 	.size = CONFIG_FB_PS3_DEFAULT_SIZE_M*1024*1024,
144 	.align = 1024*1024		/* the GPU requires 1 MiB alignment */
145 };
146 EXPORT_SYMBOL_GPL(ps3fb_videomemory);
147 #define prealloc_ps3fb_videomemory()	prealloc(&ps3fb_videomemory)
148 
early_parse_ps3fb(char * p)149 static int __init early_parse_ps3fb(char *p)
150 {
151 	if (!p)
152 		return 1;
153 
154 	ps3fb_videomemory.size = _ALIGN_UP(memparse(p, &p),
155 					   ps3fb_videomemory.align);
156 	return 0;
157 }
158 early_param("ps3fb", early_parse_ps3fb);
159 #else
160 #define prealloc_ps3fb_videomemory()	do { } while (0)
161 #endif
162 
163 #if defined(CONFIG_PS3_FLASH) || defined(CONFIG_PS3_FLASH_MODULE)
164 struct ps3_prealloc ps3flash_bounce_buffer = {
165 	.name = "ps3flash bounce buffer",
166 	.size = 256*1024,
167 	.align = 256*1024
168 };
169 EXPORT_SYMBOL_GPL(ps3flash_bounce_buffer);
170 #define prealloc_ps3flash_bounce_buffer()	prealloc(&ps3flash_bounce_buffer)
171 
early_parse_ps3flash(char * p)172 static int __init early_parse_ps3flash(char *p)
173 {
174 	if (!p)
175 		return 1;
176 
177 	if (!strcmp(p, "off"))
178 		ps3flash_bounce_buffer.size = 0;
179 
180 	return 0;
181 }
182 early_param("ps3flash", early_parse_ps3flash);
183 #else
184 #define prealloc_ps3flash_bounce_buffer()	do { } while (0)
185 #endif
186 
ps3_set_dabr(unsigned long dabr)187 static int ps3_set_dabr(unsigned long dabr)
188 {
189 	enum {DABR_USER = 1, DABR_KERNEL = 2,};
190 
191 	return lv1_set_dabr(dabr, DABR_KERNEL | DABR_USER) ? -1 : 0;
192 }
193 
ps3_setup_arch(void)194 static void __init ps3_setup_arch(void)
195 {
196 	u64 tmp;
197 
198 	DBG(" -> %s:%d\n", __func__, __LINE__);
199 
200 	lv1_get_version_info(&ps3_firmware_version.raw, &tmp);
201 
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 
ps3_progress(char * s,unsigned short hex)225 static void __init ps3_progress(char *s, unsigned short hex)
226 {
227 	printk("*** %04x : %s\n", hex, s ? s : "");
228 }
229 
ps3_probe(void)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)
ps3_kexec_cpu_down(int crash_shutdown,int secondary)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 
define_machine(ps3)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_dabr			= ps3_set_dabr,
274 	.calibrate_decr			= ps3_calibrate_decr,
275 	.progress			= ps3_progress,
276 	.restart			= ps3_restart,
277 	.power_off			= ps3_power_off,
278 	.halt				= ps3_halt,
279 #if defined(CONFIG_KEXEC)
280 	.kexec_cpu_down			= ps3_kexec_cpu_down,
281 #endif
282 };
283