sys/powerpc/ps3/platform_ps3.c

   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
  56 extern void *ap_pcpu;
  57 #endif
  58
  59 static int ps3_probe(platform_t);
  60 static int ps3_attach(platform_t);
  61 static void ps3_mem_regions(platform_t, struct mem_region *phys, int *physsz,
  62     struct mem_region *avail, int *availsz);
  63 static vm_offset_t ps3_real_maxaddr(platform_t);
  64 static u_long ps3_timebase_freq(platform_t, struct cpuref *cpuref);
  65 #ifdef SMP
  66 static int ps3_smp_first_cpu(platform_t, struct cpuref *cpuref);
  67 static int ps3_smp_next_cpu(platform_t, struct cpuref *cpuref);
  68 static int ps3_smp_get_bsp(platform_t, struct cpuref *cpuref);
  69 static int ps3_smp_start_cpu(platform_t, struct pcpu *cpu);
  70 static void ps3_smp_probe_threads(platform_t);
  71 static struct cpu_group *ps3_smp_topo(platform_t);
  72 #endif
  73 static void ps3_reset(platform_t);
  74 static void ps3_cpu_idle(sbintime_t);
  75
  76 static 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
  97 static platform_def_t ps3_platform = {
  98         "ps3",
  99         ps3_methods,
 100         0
 101 };
 102
 103 PLATFORM_DEF(ps3_platform);
 104
 105 static int ps3_boot_pir = 0;
 106
 107 static int
 108 ps3_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
 123 static int
 124 ps3_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
 136 void
 137 ps3_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
 174 static u_long
 175 ps3_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
 189 static int
 190 ps3_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
 199 static int
 200 ps3_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
 212 static int
 213 ps3_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
 222 static int
 223 ps3_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
 245 static void
 246 ps3_smp_probe_threads(platform_t plat)
 247 {
 248         mp_ncores = 1;
 249         smp_threads_per_core = 2;
 250 }
 251
 252 static struct cpu_group *
 253 ps3_smp_topo(platform_t plat)
 254 {
 255         return (smp_topo_1level(CG_SHARE_L1, 2, CG_FLAG_SMT));
 256 }
 257 #endif
 258
 259 static void
 260 ps3_reset(platform_t plat)
 261 {
 262         lv1_panic(1);
 263 }
 264
 265 static vm_offset_t
 266 ps3_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
 286 static void
 287 ps3_cpu_idle(sbintime_t sbt)
 288 {
 289         lv1_pause(0);
 290 }