xref: /freebsd/sys/powerpc/ps3/platform_ps3.c (revision d3d381b2b194b4d24853e92eecef55f262688d1a)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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/cdefs.h>
30 __FBSDID("$FreeBSD$");
31 
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/bus.h>
36 #include <sys/pcpu.h>
37 #include <sys/proc.h>
38 #include <sys/reboot.h>
39 #include <sys/smp.h>
40 
41 #include <vm/vm.h>
42 #include <vm/pmap.h>
43 
44 #include <machine/bus.h>
45 #include <machine/cpu.h>
46 #include <machine/hid.h>
47 #include <machine/platform.h>
48 #include <machine/platformvar.h>
49 #include <machine/smp.h>
50 #include <machine/spr.h>
51 #include <machine/vmparam.h>
52 
53 #include <dev/ofw/openfirm.h>
54 
55 #include "platform_if.h"
56 #include "ps3-hvcall.h"
57 
58 #ifdef SMP
59 extern void *ap_pcpu;
60 #endif
61 
62 static int ps3_probe(platform_t);
63 static int ps3_attach(platform_t);
64 static void ps3_mem_regions(platform_t, struct mem_region *phys, int *physsz,
65     struct mem_region *avail, int *availsz);
66 static vm_offset_t ps3_real_maxaddr(platform_t);
67 static u_long ps3_timebase_freq(platform_t, struct cpuref *cpuref);
68 #ifdef SMP
69 static int ps3_smp_first_cpu(platform_t, struct cpuref *cpuref);
70 static int ps3_smp_next_cpu(platform_t, struct cpuref *cpuref);
71 static int ps3_smp_get_bsp(platform_t, struct cpuref *cpuref);
72 static int ps3_smp_start_cpu(platform_t, struct pcpu *cpu);
73 static struct cpu_group *ps3_smp_topo(platform_t);
74 #endif
75 static void ps3_reset(platform_t);
76 static void ps3_cpu_idle(sbintime_t);
77 
78 static platform_method_t ps3_methods[] = {
79 	PLATFORMMETHOD(platform_probe, 		ps3_probe),
80 	PLATFORMMETHOD(platform_attach,		ps3_attach),
81 	PLATFORMMETHOD(platform_mem_regions,	ps3_mem_regions),
82 	PLATFORMMETHOD(platform_real_maxaddr,	ps3_real_maxaddr),
83 	PLATFORMMETHOD(platform_timebase_freq,	ps3_timebase_freq),
84 
85 #ifdef SMP
86 	PLATFORMMETHOD(platform_smp_first_cpu,	ps3_smp_first_cpu),
87 	PLATFORMMETHOD(platform_smp_next_cpu,	ps3_smp_next_cpu),
88 	PLATFORMMETHOD(platform_smp_get_bsp,	ps3_smp_get_bsp),
89 	PLATFORMMETHOD(platform_smp_start_cpu,	ps3_smp_start_cpu),
90 	PLATFORMMETHOD(platform_smp_topo,	ps3_smp_topo),
91 #endif
92 
93 	PLATFORMMETHOD(platform_reset,		ps3_reset),
94 
95 	PLATFORMMETHOD_END
96 };
97 
98 static platform_def_t ps3_platform = {
99 	"ps3",
100 	ps3_methods,
101 	0
102 };
103 
104 PLATFORM_DEF(ps3_platform);
105 
106 static int ps3_boot_pir = 0;
107 
108 static int
109 ps3_probe(platform_t plat)
110 {
111 	phandle_t root;
112 	char compatible[64];
113 
114 	root = OF_finddevice("/");
115 	if (OF_getprop(root, "compatible", compatible, sizeof(compatible)) <= 0)
116                 return (BUS_PROBE_NOWILDCARD);
117 
118 	if (strncmp(compatible, "sony,ps3", sizeof(compatible)) != 0)
119 		return (BUS_PROBE_NOWILDCARD);
120 
121 	return (BUS_PROBE_SPECIFIC);
122 }
123 
124 static int
125 ps3_attach(platform_t plat)
126 {
127 
128 	pmap_mmu_install("mmu_ps3", BUS_PROBE_SPECIFIC);
129 	cpu_idle_hook = ps3_cpu_idle;
130 
131 	/* Record our PIR at boot for later */
132 	ps3_boot_pir = mfspr(SPR_PIR);
133 
134 	return (0);
135 }
136 
137 void
138 ps3_mem_regions(platform_t plat, struct mem_region *phys, int *physsz,
139     struct mem_region *avail_regions, int *availsz)
140 {
141 	uint64_t lpar_id, junk;
142 	int i;
143 
144 	/* Prefer device tree information if available */
145 	if (OF_finddevice("/") != -1) {
146 		ofw_mem_regions(phys, physsz, avail_regions, availsz);
147 	} else {
148 		/* Real mode memory region is first segment */
149 		phys[0].mr_start = 0;
150 		phys[0].mr_size = ps3_real_maxaddr(plat);
151 		*physsz = *availsz = 1;
152 		avail_regions[0] = phys[0];
153 	}
154 
155 	/* Now get extended memory region */
156 	lv1_get_logical_partition_id(&lpar_id);
157 	lv1_get_repository_node_value(lpar_id,
158 	    lv1_repository_string("bi") >> 32,
159 	    lv1_repository_string("rgntotal"), 0, 0,
160 	    &phys[*physsz].mr_size, &junk);
161 	for (i = 0; i < *physsz; i++)
162 		phys[*physsz].mr_size -= phys[i].mr_size;
163 
164 	/* Convert to maximum amount we can allocate in 16 MB pages */
165 	phys[*physsz].mr_size -= phys[*physsz].mr_size % (16*1024*1024);
166 
167 	/* Allocate extended memory region */
168 	lv1_allocate_memory(phys[*physsz].mr_size, 24 /* 16 MB pages */,
169 	    0, 0x04 /* any address */, &phys[*physsz].mr_start, &junk);
170 	avail_regions[*availsz] = phys[*physsz];
171 	(*physsz)++;
172 	(*availsz)++;
173 }
174 
175 static u_long
176 ps3_timebase_freq(platform_t plat, struct cpuref *cpuref)
177 {
178 	uint64_t ticks, node_id, junk;
179 
180 	lv1_get_repository_node_value(PS3_LPAR_ID_PME,
181 	    lv1_repository_string("be") >> 32, 0, 0, 0, &node_id, &junk);
182 	lv1_get_repository_node_value(PS3_LPAR_ID_PME,
183 	    lv1_repository_string("be") >> 32, node_id,
184 	    lv1_repository_string("clock"), 0, &ticks, &junk);
185 
186 	return (ticks);
187 }
188 
189 #ifdef SMP
190 static int
191 ps3_smp_first_cpu(platform_t plat, struct cpuref *cpuref)
192 {
193 
194 	cpuref->cr_cpuid = 0;
195 	cpuref->cr_hwref = ps3_boot_pir;
196 
197 	return (0);
198 }
199 
200 static int
201 ps3_smp_next_cpu(platform_t plat, struct cpuref *cpuref)
202 {
203 
204 	if (cpuref->cr_cpuid >= 1)
205 		return (ENOENT);
206 
207 	cpuref->cr_cpuid++;
208 	cpuref->cr_hwref = !ps3_boot_pir;
209 
210 	return (0);
211 }
212 
213 static int
214 ps3_smp_get_bsp(platform_t plat, struct cpuref *cpuref)
215 {
216 
217 	cpuref->cr_cpuid = 0;
218 	cpuref->cr_hwref = ps3_boot_pir;
219 
220 	return (0);
221 }
222 
223 static int
224 ps3_smp_start_cpu(platform_t plat, struct pcpu *pc)
225 {
226 	/* kernel is spinning on 0x40 == -1 right now */
227 	volatile uint32_t *secondary_spin_sem =
228 	    (uint32_t *)PHYS_TO_DMAP((uintptr_t)0x40);
229 	int remote_pir = pc->pc_hwref;
230 	int timeout;
231 
232 	ap_pcpu = pc;
233 
234 	/* Try both PIR values, looping a few times: the HV likes moving us */
235 	timeout = 10000;
236 	while (!pc->pc_awake && timeout--) {
237 		*secondary_spin_sem = remote_pir;
238 		powerpc_sync();
239 		DELAY(100);
240 		remote_pir = !remote_pir;
241 	}
242 
243 	return ((pc->pc_awake) ? 0 : EBUSY);
244 }
245 
246 static struct cpu_group *
247 ps3_smp_topo(platform_t plat)
248 {
249 	return (smp_topo_1level(CG_SHARE_L1, 2, CG_FLAG_SMT));
250 }
251 #endif
252 
253 static void
254 ps3_reset(platform_t plat)
255 {
256 	lv1_panic(1);
257 }
258 
259 static vm_offset_t
260 ps3_real_maxaddr(platform_t plat)
261 {
262 	uint64_t lpar_id, junk, ppe_id;
263 	static uint64_t rm_maxaddr = 0;
264 
265 	if (rm_maxaddr == 0) {
266 		/* Get real mode memory region */
267 		lv1_get_logical_partition_id(&lpar_id);
268 		lv1_get_logical_ppe_id(&ppe_id);
269 
270 		lv1_get_repository_node_value(lpar_id,
271 		    lv1_repository_string("bi") >> 32,
272 		    lv1_repository_string("pu"),
273 		    ppe_id, lv1_repository_string("rm_size"),
274 		    &rm_maxaddr, &junk);
275 	}
276 
277 	return (rm_maxaddr);
278 }
279 
280 static void
281 ps3_cpu_idle(sbintime_t sbt)
282 {
283 	lv1_pause(0);
284 }
285 
286