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/kexec.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
37#include "platform.h"
38
39#if defined(DEBUG)
40#define DBG(fmt...) udbg_printf(fmt)
41#else
42#define DBG(fmt...) do{if(0)printk(fmt);}while(0)
43#endif
44
45#if !defined(CONFIG_SMP)
46static void smp_send_stop(void) {}
47#endif
48
49int ps3_get_firmware_version(union ps3_firmware_version *v)
50{
51	int result = lv1_get_version_info(&v->raw);
52
53	if (result) {
54		v->raw = 0;
55		return -1;
56	}
57
58	return result;
59}
60EXPORT_SYMBOL_GPL(ps3_get_firmware_version);
61
62static void ps3_power_save(void)
63{
64	/*
65	 * lv1_pause() puts the PPE thread into inactive state until an
66	 * irq on an unmasked plug exists. MSR[EE] has no effect.
67	 * flags: 0 = wake on DEC interrupt, 1 = ignore DEC interrupt.
68	 */
69
70	lv1_pause(0);
71}
72
73static void ps3_restart(char *cmd)
74{
75	DBG("%s:%d cmd '%s'\n", __func__, __LINE__, cmd);
76
77	smp_send_stop();
78	ps3_sys_manager_restart(); /* never returns */
79}
80
81static void ps3_power_off(void)
82{
83	DBG("%s:%d\n", __func__, __LINE__);
84
85	smp_send_stop();
86	ps3_sys_manager_power_off(); /* never returns */
87}
88
89static void ps3_panic(char *str)
90{
91	DBG("%s:%d %s\n", __func__, __LINE__, str);
92
93	smp_send_stop();
94	printk("\n");
95	printk("   System does not reboot automatically.\n");
96	printk("   Please press POWER button.\n");
97	printk("\n");
98
99	while(1);
100}
101
102#ifdef CONFIG_FB_PS3
103static void prealloc(struct ps3_prealloc *p)
104{
105	if (!p->size)
106		return;
107
108	p->address = __alloc_bootmem(p->size, p->align, __pa(MAX_DMA_ADDRESS));
109	if (!p->address) {
110		printk(KERN_ERR "%s: Cannot allocate %s\n", __FUNCTION__,
111		       p->name);
112		return;
113	}
114
115	printk(KERN_INFO "%s: %lu bytes at %p\n", p->name, p->size,
116	       p->address);
117}
118
119struct ps3_prealloc ps3fb_videomemory = {
120    .name = "ps3fb videomemory",
121    .size = CONFIG_FB_PS3_DEFAULT_SIZE_M*1024*1024,
122    .align = 1024*1024			/* the GPU requires 1 MiB alignment */
123};
124#define prealloc_ps3fb_videomemory()	prealloc(&ps3fb_videomemory)
125
126static int __init early_parse_ps3fb(char *p)
127{
128	if (!p)
129		return 1;
130
131	ps3fb_videomemory.size = _ALIGN_UP(memparse(p, &p),
132					   ps3fb_videomemory.align);
133	return 0;
134}
135early_param("ps3fb", early_parse_ps3fb);
136#else
137#define prealloc_ps3fb_videomemory()	do { } while (0)
138#endif
139
140static int ps3_set_dabr(u64 dabr)
141{
142	enum {DABR_USER = 1, DABR_KERNEL = 2,};
143
144	return lv1_set_dabr(dabr, DABR_KERNEL | DABR_USER) ? -1 : 0;
145}
146
147static void __init ps3_setup_arch(void)
148{
149	union ps3_firmware_version v;
150
151	DBG(" -> %s:%d\n", __func__, __LINE__);
152
153	ps3_get_firmware_version(&v);
154	printk(KERN_INFO "PS3 firmware version %u.%u.%u\n", v.major, v.minor,
155		v.rev);
156
157	ps3_spu_set_platform();
158	ps3_map_htab();
159
160#ifdef CONFIG_SMP
161	smp_init_ps3();
162#endif
163
164#ifdef CONFIG_DUMMY_CONSOLE
165	conswitchp = &dummy_con;
166#endif
167
168	prealloc_ps3fb_videomemory();
169	ppc_md.power_save = ps3_power_save;
170
171	DBG(" <- %s:%d\n", __func__, __LINE__);
172}
173
174static void __init ps3_progress(char *s, unsigned short hex)
175{
176	printk("*** %04x : %s\n", hex, s ? s : "");
177}
178
179static int __init ps3_probe(void)
180{
181	unsigned long htab_size;
182	unsigned long dt_root;
183
184	DBG(" -> %s:%d\n", __func__, __LINE__);
185
186	dt_root = of_get_flat_dt_root();
187	if (!of_flat_dt_is_compatible(dt_root, "PS3"))
188		return 0;
189
190	powerpc_firmware_features |= FW_FEATURE_PS3_POSSIBLE;
191
192	ps3_os_area_init();
193	ps3_mm_init();
194	ps3_mm_vas_create(&htab_size);
195	ps3_hpte_init(htab_size);
196
197	DBG(" <- %s:%d\n", __func__, __LINE__);
198	return 1;
199}
200
201#if defined(CONFIG_KEXEC)
202static void ps3_kexec_cpu_down(int crash_shutdown, int secondary)
203{
204	DBG(" -> %s:%d\n", __func__, __LINE__);
205
206	if (secondary) {
207		int cpu;
208		for_each_online_cpu(cpu)
209			if (cpu)
210				ps3_smp_cleanup_cpu(cpu);
211	} else
212		ps3_smp_cleanup_cpu(0);
213
214	DBG(" <- %s:%d\n", __func__, __LINE__);
215}
216
217static void ps3_machine_kexec(struct kimage *image)
218{
219	unsigned long ppe_id;
220
221	DBG(" -> %s:%d\n", __func__, __LINE__);
222
223	lv1_get_logical_ppe_id(&ppe_id);
224	lv1_configure_irq_state_bitmap(ppe_id, 0, 0);
225	ps3_mm_shutdown();
226	ps3_mm_vas_destroy();
227
228	default_machine_kexec(image);
229
230	DBG(" <- %s:%d\n", __func__, __LINE__);
231}
232#endif
233
234define_machine(ps3) {
235	.name				= "PS3",
236	.probe				= ps3_probe,
237	.setup_arch			= ps3_setup_arch,
238	.init_IRQ			= ps3_init_IRQ,
239	.panic				= ps3_panic,
240	.get_boot_time			= ps3_get_boot_time,
241	.set_rtc_time			= ps3_set_rtc_time,
242	.get_rtc_time			= ps3_get_rtc_time,
243	.set_dabr			= ps3_set_dabr,
244	.calibrate_decr			= ps3_calibrate_decr,
245	.progress			= ps3_progress,
246	.restart			= ps3_restart,
247	.power_off			= ps3_power_off,
248#if defined(CONFIG_KEXEC)
249	.kexec_cpu_down			= ps3_kexec_cpu_down,
250	.machine_kexec			= ps3_machine_kexec,
251	.machine_kexec_prepare		= default_machine_kexec_prepare,
252	.machine_crash_shutdown		= default_machine_crash_shutdown,
253#endif
254};
255