setup.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 *  PS3 platform setup routines.
  4 *
  5 *  Copyright (C) 2006 Sony Computer Entertainment Inc.
  6 *  Copyright 2006 Sony Corp.
  7 */
  8
  9#include <linux/kernel.h>
 10#include <linux/delay.h>
 11#include <linux/fs.h>
 12#include <linux/root_dev.h>
 13#include <linux/console.h>
 14#include <linux/export.h>
 15#include <linux/memblock.h>
 16#include <linux/of.h>
 17
 18#include <asm/machdep.h>
 19#include <asm/firmware.h>
 20#include <asm/time.h>
 21#include <asm/iommu.h>
 22#include <asm/udbg.h>
 23#include <asm/lv1call.h>
 24#include <asm/ps3gpu.h>
 25
 26#include "platform.h"
 27
 28#if defined(DEBUG)
 29#define DBG udbg_printf
 30#else
 31#define DBG pr_debug
 32#endif
 33
 34/* mutex synchronizing GPU accesses and video mode changes */
 35DEFINE_MUTEX(ps3_gpu_mutex);
 36EXPORT_SYMBOL_GPL(ps3_gpu_mutex);
 37
 38static union ps3_firmware_version ps3_firmware_version;
 39static char ps3_firmware_version_str[16];
 40
 41void ps3_get_firmware_version(union ps3_firmware_version *v)
 42{
 43	*v = ps3_firmware_version;
 44}
 45EXPORT_SYMBOL_GPL(ps3_get_firmware_version);
 46
 47int ps3_compare_firmware_version(u16 major, u16 minor, u16 rev)
 48{
 49	union ps3_firmware_version x;
 50
 51	x.pad = 0;
 52	x.major = major;
 53	x.minor = minor;
 54	x.rev = rev;
 55
 56	return (ps3_firmware_version.raw > x.raw) -
 57	       (ps3_firmware_version.raw < x.raw);
 58}
 59EXPORT_SYMBOL_GPL(ps3_compare_firmware_version);
 60
 61static void ps3_power_save(void)
 62{
 63	/*
 64	 * lv1_pause() puts the PPE thread into inactive state until an
 65	 * irq on an unmasked plug exists. MSR[EE] has no effect.
 66	 * flags: 0 = wake on DEC interrupt, 1 = ignore DEC interrupt.
 67	 */
 68
 69	lv1_pause(0);
 70}
 71
 72static void __noreturn ps3_restart(char *cmd)
 73{
 74	DBG("%s:%d cmd '%s'\n", __func__, __LINE__, cmd);
 75
 76	smp_send_stop();
 77	ps3_sys_manager_restart(); /* never returns */
 78}
 79
 80static void ps3_power_off(void)
 81{
 82	DBG("%s:%d\n", __func__, __LINE__);
 83
 84	smp_send_stop();
 85	ps3_sys_manager_power_off(); /* never returns */
 86}
 87
 88static void __noreturn ps3_halt(void)
 89{
 90	DBG("%s:%d\n", __func__, __LINE__);
 91
 92	smp_send_stop();
 93	ps3_sys_manager_halt(); /* never returns */
 94}
 95
 96static void ps3_panic(char *str)
 97{
 98	DBG("%s:%d %s\n", __func__, __LINE__, str);
 99
100	smp_send_stop();
101	printk("\n");
102	printk("   System does not reboot automatically.\n");
103	printk("   Please press POWER button.\n");
104	printk("\n");
105	panic_flush_kmsg_end();
106
107	while(1)
108		lv1_pause(1);
109}
110
111#if defined(CONFIG_FB_PS3) || defined(CONFIG_FB_PS3_MODULE) || \
112    defined(CONFIG_PS3_FLASH) || defined(CONFIG_PS3_FLASH_MODULE)
113static void __init prealloc(struct ps3_prealloc *p)
114{
115	if (!p->size)
116		return;
117
118	p->address = memblock_alloc_or_panic(p->size, p->align);
119
120	printk(KERN_INFO "%s: %lu bytes at %p\n", p->name, p->size,
121	       p->address);
122}
123#endif
124
125#if defined(CONFIG_FB_PS3) || defined(CONFIG_FB_PS3_MODULE)
126struct ps3_prealloc ps3fb_videomemory = {
127	.name = "ps3fb videomemory",
128	.size = CONFIG_FB_PS3_DEFAULT_SIZE_M*1024*1024,
129	.align = 1024*1024		/* the GPU requires 1 MiB alignment */
130};
131EXPORT_SYMBOL_GPL(ps3fb_videomemory);
132#define prealloc_ps3fb_videomemory()	prealloc(&ps3fb_videomemory)
133
134static int __init early_parse_ps3fb(char *p)
135{
136	if (!p)
137		return 1;
138
139	ps3fb_videomemory.size = ALIGN(memparse(p, &p),
140					   ps3fb_videomemory.align);
141	return 0;
142}
143early_param("ps3fb", early_parse_ps3fb);
144#else
145#define prealloc_ps3fb_videomemory()	do { } while (0)
146#endif
147
148#if defined(CONFIG_PS3_FLASH) || defined(CONFIG_PS3_FLASH_MODULE)
149struct ps3_prealloc ps3flash_bounce_buffer = {
150	.name = "ps3flash bounce buffer",
151	.size = 256*1024,
152	.align = 256*1024
153};
154EXPORT_SYMBOL_GPL(ps3flash_bounce_buffer);
155#define prealloc_ps3flash_bounce_buffer()	prealloc(&ps3flash_bounce_buffer)
156
157static int __init early_parse_ps3flash(char *p)
158{
159	if (!p)
160		return 1;
161
162	if (!strcmp(p, "off"))
163		ps3flash_bounce_buffer.size = 0;
164
165	return 0;
166}
167early_param("ps3flash", early_parse_ps3flash);
168#else
169#define prealloc_ps3flash_bounce_buffer()	do { } while (0)
170#endif
171
172static int ps3_set_dabr(unsigned long dabr, unsigned long dabrx)
173{
174	/* Have to set at least one bit in the DABRX */
175	if (dabrx == 0 && dabr == 0)
176		dabrx = DABRX_USER;
177	/* hypervisor only allows us to set BTI, Kernel and user */
178	dabrx &= DABRX_BTI | DABRX_KERNEL | DABRX_USER;
179
180	return lv1_set_dabr(dabr, dabrx) ? -1 : 0;
181}
182
183static ssize_t ps3_fw_version_show(struct kobject *kobj,
184	struct kobj_attribute *attr, char *buf)
185{
186	return sprintf(buf, "%s", ps3_firmware_version_str);
187}
188
189static int __init ps3_setup_sysfs(void)
190{
191	static struct kobj_attribute attr = __ATTR(fw-version, S_IRUGO,
192		ps3_fw_version_show, NULL);
193	static struct kobject *kobj;
194	int result;
195
196	kobj = kobject_create_and_add("ps3", firmware_kobj);
197
198	if (!kobj) {
199		pr_warn("%s:%d: kobject_create_and_add failed.\n", __func__,
200			__LINE__);
201		return -ENOMEM;
202	}
203
204	result = sysfs_create_file(kobj, &attr.attr);
205
206	if (result) {
207		pr_warn("%s:%d: sysfs_create_file failed.\n", __func__,
208			__LINE__);
209		kobject_put(kobj);
210		return -ENOMEM;
211	}
212
213	return 0;
214}
215core_initcall(ps3_setup_sysfs);
216
217static void __init ps3_setup_arch(void)
218{
219	u64 tmp;
220
221	DBG(" -> %s:%d\n", __func__, __LINE__);
222
223	lv1_get_version_info(&ps3_firmware_version.raw, &tmp);
224
225	snprintf(ps3_firmware_version_str, sizeof(ps3_firmware_version_str),
226		"%u.%u.%u", ps3_firmware_version.major,
227		ps3_firmware_version.minor, ps3_firmware_version.rev);
228
229	printk(KERN_INFO "PS3 firmware version %s\n", ps3_firmware_version_str);
230
231	ps3_spu_set_platform();
232
233#ifdef CONFIG_SMP
234	smp_init_ps3();
235#endif
236
237	prealloc_ps3fb_videomemory();
238	prealloc_ps3flash_bounce_buffer();
239
240	ppc_md.power_save = ps3_power_save;
241	ps3_os_area_init();
242
243	DBG(" <- %s:%d\n", __func__, __LINE__);
244}
245
246static void __init ps3_progress(char *s, unsigned short hex)
247{
248	printk("*** %04x : %s\n", hex, s ? s : "");
249}
250
251void __init ps3_early_mm_init(void)
252{
253	unsigned long htab_size;
254
255	ps3_mm_init();
256	ps3_mm_vas_create(&htab_size);
257	ps3_hpte_init(htab_size);
258}
259
260static int __init ps3_probe(void)
261{
262	DBG(" -> %s:%d\n", __func__, __LINE__);
263
264	ps3_os_area_save_params();
265
266	pm_power_off = ps3_power_off;
267
268	DBG(" <- %s:%d\n", __func__, __LINE__);
269	return 1;
270}
271
272#if defined(CONFIG_KEXEC_CORE)
273static void ps3_kexec_cpu_down(int crash_shutdown, int secondary)
274{
275	int cpu = smp_processor_id();
276
277	DBG(" -> %s:%d: (%d)\n", __func__, __LINE__, cpu);
278
279	ps3_smp_cleanup_cpu(cpu);
280	ps3_shutdown_IRQ(cpu);
281
282	DBG(" <- %s:%d\n", __func__, __LINE__);
283}
284#endif
285
286define_machine(ps3) {
287	.name				= "PS3",
288	.compatible			= "sony,ps3",
289	.probe				= ps3_probe,
290	.setup_arch			= ps3_setup_arch,
291	.init_IRQ			= ps3_init_IRQ,
292	.panic				= ps3_panic,
293	.get_boot_time			= ps3_get_boot_time,
294	.set_dabr			= ps3_set_dabr,
295	.calibrate_decr			= ps3_calibrate_decr,
296	.progress			= ps3_progress,
297	.restart			= ps3_restart,
298	.halt				= ps3_halt,
299#if defined(CONFIG_KEXEC_CORE)
300	.kexec_cpu_down			= ps3_kexec_cpu_down,
301#endif
302};