1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2010 Nathan Whitehorn
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/param.h>
30#include <sys/systm.h>
31#include <sys/kernel.h>
32#include <sys/bus.h>
33#include <sys/pcpu.h>
34#include <sys/proc.h>
35#include <sys/reboot.h>
36#include <sys/smp.h>
37
38#include <vm/vm.h>
39#include <vm/pmap.h>
40
41#include <machine/bus.h>
42#include <machine/cpu.h>
43#include <machine/hid.h>
44#include <machine/platform.h>
45#include <machine/platformvar.h>
46#include <machine/smp.h>
47#include <machine/spr.h>
48#include <machine/vmparam.h>
49
50#include <dev/ofw/openfirm.h>
51
52#include "platform_if.h"
53#include "ps3-hvcall.h"
54
55#ifdef SMP
56extern void *ap_pcpu;
57#endif
58
59static int ps3_probe(platform_t);
60static int ps3_attach(platform_t);
61static void ps3_mem_regions(platform_t, struct mem_region *phys, int *physsz,
62    struct mem_region *avail, int *availsz);
63static vm_offset_t ps3_real_maxaddr(platform_t);
64static u_long ps3_timebase_freq(platform_t, struct cpuref *cpuref);
65#ifdef SMP
66static int ps3_smp_first_cpu(platform_t, struct cpuref *cpuref);
67static int ps3_smp_next_cpu(platform_t, struct cpuref *cpuref);
68static int ps3_smp_get_bsp(platform_t, struct cpuref *cpuref);
69static int ps3_smp_start_cpu(platform_t, struct pcpu *cpu);
70static void ps3_smp_probe_threads(platform_t);
71static struct cpu_group *ps3_smp_topo(platform_t);
72#endif
73static void ps3_reset(platform_t);
74static void ps3_cpu_idle(sbintime_t);
75
76static platform_method_t ps3_methods[] = {
77	PLATFORMMETHOD(platform_probe, 		ps3_probe),
78	PLATFORMMETHOD(platform_attach,		ps3_attach),
79	PLATFORMMETHOD(platform_mem_regions,	ps3_mem_regions),
80	PLATFORMMETHOD(platform_real_maxaddr,	ps3_real_maxaddr),
81	PLATFORMMETHOD(platform_timebase_freq,	ps3_timebase_freq),
82
83#ifdef SMP
84	PLATFORMMETHOD(platform_smp_first_cpu,	ps3_smp_first_cpu),
85	PLATFORMMETHOD(platform_smp_next_cpu,	ps3_smp_next_cpu),
86	PLATFORMMETHOD(platform_smp_get_bsp,	ps3_smp_get_bsp),
87	PLATFORMMETHOD(platform_smp_start_cpu,	ps3_smp_start_cpu),
88	PLATFORMMETHOD(platform_smp_probe_threads,	ps3_smp_probe_threads),
89	PLATFORMMETHOD(platform_smp_topo,	ps3_smp_topo),
90#endif
91
92	PLATFORMMETHOD(platform_reset,		ps3_reset),
93
94	PLATFORMMETHOD_END
95};
96
97static platform_def_t ps3_platform = {
98	"ps3",
99	ps3_methods,
100	0
101};
102
103PLATFORM_DEF(ps3_platform);
104
105static int ps3_boot_pir = 0;
106
107static int
108ps3_probe(platform_t plat)
109{
110	phandle_t root;
111	char compatible[64];
112
113	root = OF_finddevice("/");
114	if (OF_getprop(root, "compatible", compatible, sizeof(compatible)) <= 0)
115                return (BUS_PROBE_NOWILDCARD);
116
117	if (strncmp(compatible, "sony,ps3", sizeof(compatible)) != 0)
118		return (BUS_PROBE_NOWILDCARD);
119
120	return (BUS_PROBE_SPECIFIC);
121}
122
123static int
124ps3_attach(platform_t plat)
125{
126
127	pmap_mmu_install("mmu_ps3", BUS_PROBE_SPECIFIC);
128	cpu_idle_hook = ps3_cpu_idle;
129
130	/* Record our PIR at boot for later */
131	ps3_boot_pir = mfspr(SPR_PIR);
132
133	return (0);
134}
135
136void
137ps3_mem_regions(platform_t plat, struct mem_region *phys, int *physsz,
138    struct mem_region *avail_regions, int *availsz)
139{
140	uint64_t lpar_id, junk;
141	int i;
142
143	/* Prefer device tree information if available */
144	if (OF_finddevice("/") != -1) {
145		ofw_mem_regions(phys, physsz, avail_regions, availsz);
146	} else {
147		/* Real mode memory region is first segment */
148		phys[0].mr_start = 0;
149		phys[0].mr_size = ps3_real_maxaddr(plat);
150		*physsz = *availsz = 1;
151		avail_regions[0] = phys[0];
152	}
153
154	/* Now get extended memory region */
155	lv1_get_logical_partition_id(&lpar_id);
156	lv1_get_repository_node_value(lpar_id,
157	    lv1_repository_string("bi") >> 32,
158	    lv1_repository_string("rgntotal"), 0, 0,
159	    &phys[*physsz].mr_size, &junk);
160	for (i = 0; i < *physsz; i++)
161		phys[*physsz].mr_size -= phys[i].mr_size;
162
163	/* Convert to maximum amount we can allocate in 16 MB pages */
164	phys[*physsz].mr_size -= phys[*physsz].mr_size % (16*1024*1024);
165
166	/* Allocate extended memory region */
167	lv1_allocate_memory(phys[*physsz].mr_size, 24 /* 16 MB pages */,
168	    0, 0x04 /* any address */, &phys[*physsz].mr_start, &junk);
169	avail_regions[*availsz] = phys[*physsz];
170	(*physsz)++;
171	(*availsz)++;
172}
173
174static u_long
175ps3_timebase_freq(platform_t plat, struct cpuref *cpuref)
176{
177	uint64_t ticks, node_id, junk;
178
179	lv1_get_repository_node_value(PS3_LPAR_ID_PME,
180	    lv1_repository_string("be") >> 32, 0, 0, 0, &node_id, &junk);
181	lv1_get_repository_node_value(PS3_LPAR_ID_PME,
182	    lv1_repository_string("be") >> 32, node_id,
183	    lv1_repository_string("clock"), 0, &ticks, &junk);
184
185	return (ticks);
186}
187
188#ifdef SMP
189static int
190ps3_smp_first_cpu(platform_t plat, struct cpuref *cpuref)
191{
192
193	cpuref->cr_cpuid = 0;
194	cpuref->cr_hwref = ps3_boot_pir;
195
196	return (0);
197}
198
199static int
200ps3_smp_next_cpu(platform_t plat, struct cpuref *cpuref)
201{
202
203	if (cpuref->cr_cpuid >= 1)
204		return (ENOENT);
205
206	cpuref->cr_cpuid++;
207	cpuref->cr_hwref = !ps3_boot_pir;
208
209	return (0);
210}
211
212static int
213ps3_smp_get_bsp(platform_t plat, struct cpuref *cpuref)
214{
215
216	cpuref->cr_cpuid = 0;
217	cpuref->cr_hwref = ps3_boot_pir;
218
219	return (0);
220}
221
222static int
223ps3_smp_start_cpu(platform_t plat, struct pcpu *pc)
224{
225	/* kernel is spinning on 0x40 == -1 right now */
226	volatile uint32_t *secondary_spin_sem =
227	    (uint32_t *)PHYS_TO_DMAP((uintptr_t)0x40);
228	int remote_pir = pc->pc_hwref;
229	int timeout;
230
231	ap_pcpu = pc;
232
233	/* Try both PIR values, looping a few times: the HV likes moving us */
234	timeout = 10000;
235	while (!pc->pc_awake && timeout--) {
236		*secondary_spin_sem = remote_pir;
237		powerpc_sync();
238		DELAY(100);
239		remote_pir = !remote_pir;
240	}
241
242	return ((pc->pc_awake) ? 0 : EBUSY);
243}
244
245static void
246ps3_smp_probe_threads(platform_t plat)
247{
248	mp_ncores = 1;
249	smp_threads_per_core = 2;
250}
251
252static struct cpu_group *
253ps3_smp_topo(platform_t plat)
254{
255	return (smp_topo_1level(CG_SHARE_L1, 2, CG_FLAG_SMT));
256}
257#endif
258
259static void
260ps3_reset(platform_t plat)
261{
262	lv1_panic(1);
263}
264
265static vm_offset_t
266ps3_real_maxaddr(platform_t plat)
267{
268	uint64_t lpar_id, junk, ppe_id;
269	static uint64_t rm_maxaddr = 0;
270
271	if (rm_maxaddr == 0) {
272		/* Get real mode memory region */
273		lv1_get_logical_partition_id(&lpar_id);
274		lv1_get_logical_ppe_id(&ppe_id);
275
276		lv1_get_repository_node_value(lpar_id,
277		    lv1_repository_string("bi") >> 32,
278		    lv1_repository_string("pu"),
279		    ppe_id, lv1_repository_string("rm_size"),
280		    &rm_maxaddr, &junk);
281	}
282
283	return (rm_maxaddr);
284}
285
286static void
287ps3_cpu_idle(sbintime_t sbt)
288{
289	lv1_pause(0);
290}
291