1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2008 Marcel Moolenaar 5 * Copyright (c) 2009 Nathan Whitehorn 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/bus.h> 37 #include <sys/pcpu.h> 38 #include <sys/proc.h> 39 #include <sys/smp.h> 40 #include <vm/vm.h> 41 #include <vm/pmap.h> 42 43 #include <machine/altivec.h> /* For save_vec() */ 44 #include <machine/bus.h> 45 #include <machine/cpu.h> 46 #include <machine/fpu.h> /* For save_fpu() */ 47 #include <machine/hid.h> 48 #include <machine/platformvar.h> 49 #include <machine/setjmp.h> 50 #include <machine/smp.h> 51 #include <machine/spr.h> 52 53 #include <dev/ofw/openfirm.h> 54 #include <machine/ofw_machdep.h> 55 56 #include "platform_if.h" 57 58 extern void *ap_pcpu; 59 60 static int powermac_probe(platform_t); 61 static int powermac_attach(platform_t); 62 void powermac_mem_regions(platform_t, struct mem_region *phys, int *physsz, 63 struct mem_region *avail, int *availsz); 64 static u_long powermac_timebase_freq(platform_t, struct cpuref *cpuref); 65 static int powermac_smp_first_cpu(platform_t, struct cpuref *cpuref); 66 static int powermac_smp_next_cpu(platform_t, struct cpuref *cpuref); 67 static int powermac_smp_get_bsp(platform_t, struct cpuref *cpuref); 68 static int powermac_smp_start_cpu(platform_t, struct pcpu *cpu); 69 static void powermac_smp_timebase_sync(platform_t, u_long tb, int ap); 70 static void powermac_reset(platform_t); 71 static void powermac_sleep(platform_t); 72 73 static platform_method_t powermac_methods[] = { 74 PLATFORMMETHOD(platform_probe, powermac_probe), 75 PLATFORMMETHOD(platform_attach, powermac_attach), 76 PLATFORMMETHOD(platform_mem_regions, powermac_mem_regions), 77 PLATFORMMETHOD(platform_timebase_freq, powermac_timebase_freq), 78 79 PLATFORMMETHOD(platform_smp_first_cpu, powermac_smp_first_cpu), 80 PLATFORMMETHOD(platform_smp_next_cpu, powermac_smp_next_cpu), 81 PLATFORMMETHOD(platform_smp_get_bsp, powermac_smp_get_bsp), 82 PLATFORMMETHOD(platform_smp_start_cpu, powermac_smp_start_cpu), 83 PLATFORMMETHOD(platform_smp_timebase_sync, powermac_smp_timebase_sync), 84 85 PLATFORMMETHOD(platform_reset, powermac_reset), 86 PLATFORMMETHOD(platform_sleep, powermac_sleep), 87 88 PLATFORMMETHOD_END 89 }; 90 91 static platform_def_t powermac_platform = { 92 "powermac", 93 powermac_methods, 94 0 95 }; 96 97 PLATFORM_DEF(powermac_platform); 98 99 static int 100 powermac_probe(platform_t plat) 101 { 102 char compat[255]; 103 ssize_t compatlen; 104 char *curstr; 105 phandle_t root; 106 107 root = OF_peer(0); 108 if (root == 0) 109 return (ENXIO); 110 111 compatlen = OF_getprop(root, "compatible", compat, sizeof(compat)); 112 113 for (curstr = compat; curstr < compat + compatlen; 114 curstr += strlen(curstr) + 1) { 115 if (strncmp(curstr, "MacRISC", 7) == 0) 116 return (BUS_PROBE_SPECIFIC); 117 } 118 119 return (ENXIO); 120 } 121 122 void 123 powermac_mem_regions(platform_t plat, struct mem_region *phys, int *physsz, 124 struct mem_region *avail, int *availsz) 125 { 126 phandle_t memory; 127 cell_t memoryprop[PHYS_AVAIL_SZ * 2]; 128 ssize_t propsize, i, j; 129 int physacells = 1; 130 131 memory = OF_finddevice("/memory"); 132 if (memory == -1) 133 memory = OF_finddevice("/memory@0"); 134 135 /* "reg" has variable #address-cells, but #size-cells is always 1 */ 136 OF_getprop(OF_parent(memory), "#address-cells", &physacells, 137 sizeof(physacells)); 138 139 propsize = OF_getprop(memory, "reg", memoryprop, sizeof(memoryprop)); 140 propsize /= sizeof(cell_t); 141 for (i = 0, j = 0; i < propsize; i += physacells+1, j++) { 142 phys[j].mr_start = memoryprop[i]; 143 if (physacells == 2) { 144 #ifndef __powerpc64__ 145 /* On 32-bit PPC, ignore regions starting above 4 GB */ 146 if (memoryprop[i] != 0) { 147 j--; 148 continue; 149 } 150 #else 151 phys[j].mr_start <<= 32; 152 #endif 153 phys[j].mr_start |= memoryprop[i+1]; 154 } 155 phys[j].mr_size = memoryprop[i + physacells]; 156 } 157 *physsz = j; 158 159 /* "available" always has #address-cells = 1 */ 160 propsize = OF_getprop(memory, "available", memoryprop, 161 sizeof(memoryprop)); 162 if (propsize <= 0) { 163 for (i = 0; i < *physsz; i++) { 164 avail[i].mr_start = phys[i].mr_start; 165 avail[i].mr_size = phys[i].mr_size; 166 } 167 168 *availsz = *physsz; 169 } else { 170 propsize /= sizeof(cell_t); 171 for (i = 0, j = 0; i < propsize; i += 2, j++) { 172 avail[j].mr_start = memoryprop[i]; 173 avail[j].mr_size = memoryprop[i + 1]; 174 } 175 176 #ifdef __powerpc64__ 177 /* Add in regions above 4 GB to the available list */ 178 for (i = 0; i < *physsz; i++) { 179 if (phys[i].mr_start > BUS_SPACE_MAXADDR_32BIT) { 180 avail[j].mr_start = phys[i].mr_start; 181 avail[j].mr_size = phys[i].mr_size; 182 j++; 183 } 184 } 185 #endif 186 *availsz = j; 187 } 188 } 189 190 static int 191 powermac_attach(platform_t plat) 192 { 193 phandle_t rootnode; 194 char model[32]; 195 196 /* 197 * Quiesce Open Firmware on PowerMac11,2 and 12,1. It is 198 * necessary there to shut down a background thread doing fan 199 * management, and is harmful on other machines (it will make OF 200 * shut off power to various system components it had turned on). 201 * 202 * Note: we don't need to worry about which OF module we are 203 * using since this is called only from very early boot, within 204 * OF's boot context. 205 */ 206 207 rootnode = OF_finddevice("/"); 208 if (OF_getprop(rootnode, "model", model, sizeof(model)) > 0) { 209 if (strcmp(model, "PowerMac11,2") == 0 || 210 strcmp(model, "PowerMac12,1") == 0) { 211 ofw_quiesce(); 212 } 213 } 214 215 return (0); 216 } 217 218 static u_long 219 powermac_timebase_freq(platform_t plat, struct cpuref *cpuref) 220 { 221 phandle_t phandle; 222 int32_t ticks = -1; 223 224 phandle = cpuref->cr_hwref; 225 226 OF_getprop(phandle, "timebase-frequency", &ticks, sizeof(ticks)); 227 228 if (ticks <= 0) 229 panic("Unable to determine timebase frequency!"); 230 231 return (ticks); 232 } 233 234 static int 235 powermac_smp_fill_cpuref(struct cpuref *cpuref, phandle_t cpu) 236 { 237 cell_t cpuid; 238 int res; 239 240 cpuref->cr_hwref = cpu; 241 res = OF_getprop(cpu, "reg", &cpuid, sizeof(cpuid)); 242 243 /* 244 * psim doesn't have a reg property, so assume 0 as for the 245 * uniprocessor case in the CHRP spec. 246 */ 247 if (res < 0) { 248 cpuid = 0; 249 } 250 251 cpuref->cr_cpuid = cpuid & 0xff; 252 return (0); 253 } 254 255 static int 256 powermac_smp_first_cpu(platform_t plat, struct cpuref *cpuref) 257 { 258 char buf[8]; 259 phandle_t cpu, dev, root; 260 int res; 261 262 root = OF_peer(0); 263 264 dev = OF_child(root); 265 while (dev != 0) { 266 res = OF_getprop(dev, "name", buf, sizeof(buf)); 267 if (res > 0 && strcmp(buf, "cpus") == 0) 268 break; 269 dev = OF_peer(dev); 270 } 271 if (dev == 0) { 272 /* 273 * psim doesn't have a name property on the /cpus node, 274 * but it can be found directly 275 */ 276 dev = OF_finddevice("/cpus"); 277 if (dev == -1) 278 return (ENOENT); 279 } 280 281 cpu = OF_child(dev); 282 283 while (cpu != 0) { 284 res = OF_getprop(cpu, "device_type", buf, sizeof(buf)); 285 if (res > 0 && strcmp(buf, "cpu") == 0) 286 break; 287 cpu = OF_peer(cpu); 288 } 289 if (cpu == 0) 290 return (ENOENT); 291 292 return (powermac_smp_fill_cpuref(cpuref, cpu)); 293 } 294 295 static int 296 powermac_smp_next_cpu(platform_t plat, struct cpuref *cpuref) 297 { 298 char buf[8]; 299 phandle_t cpu; 300 int res; 301 302 cpu = OF_peer(cpuref->cr_hwref); 303 while (cpu != 0) { 304 res = OF_getprop(cpu, "device_type", buf, sizeof(buf)); 305 if (res > 0 && strcmp(buf, "cpu") == 0) 306 break; 307 cpu = OF_peer(cpu); 308 } 309 if (cpu == 0) 310 return (ENOENT); 311 312 return (powermac_smp_fill_cpuref(cpuref, cpu)); 313 } 314 315 static int 316 powermac_smp_get_bsp(platform_t plat, struct cpuref *cpuref) 317 { 318 ihandle_t inst; 319 phandle_t bsp, chosen; 320 int res; 321 322 chosen = OF_finddevice("/chosen"); 323 if (chosen == -1) 324 return (ENXIO); 325 326 res = OF_getprop(chosen, "cpu", &inst, sizeof(inst)); 327 if (res < 0) 328 return (ENXIO); 329 330 bsp = OF_instance_to_package(inst); 331 return (powermac_smp_fill_cpuref(cpuref, bsp)); 332 } 333 334 static int 335 powermac_smp_start_cpu(platform_t plat, struct pcpu *pc) 336 { 337 #ifdef SMP 338 phandle_t cpu; 339 volatile uint8_t *rstvec; 340 static volatile uint8_t *rstvec_virtbase = NULL; 341 int res, reset, timeout; 342 343 cpu = pc->pc_hwref; 344 res = OF_getprop(cpu, "soft-reset", &reset, sizeof(reset)); 345 if (res < 0) { 346 reset = 0x58; 347 348 switch (pc->pc_cpuid) { 349 case 0: 350 reset += 0x03; 351 break; 352 case 1: 353 reset += 0x04; 354 break; 355 case 2: 356 reset += 0x0f; 357 break; 358 case 3: 359 reset += 0x10; 360 break; 361 default: 362 return (ENXIO); 363 } 364 } 365 366 ap_pcpu = pc; 367 368 if (rstvec_virtbase == NULL) 369 rstvec_virtbase = pmap_mapdev(0x80000000, PAGE_SIZE); 370 371 rstvec = rstvec_virtbase + reset; 372 373 *rstvec = 4; 374 powerpc_sync(); 375 (void)(*rstvec); 376 powerpc_sync(); 377 DELAY(1); 378 *rstvec = 0; 379 powerpc_sync(); 380 (void)(*rstvec); 381 powerpc_sync(); 382 383 timeout = 10000; 384 while (!pc->pc_awake && timeout--) 385 DELAY(100); 386 387 return ((pc->pc_awake) ? 0 : EBUSY); 388 #else 389 /* No SMP support */ 390 return (ENXIO); 391 #endif 392 } 393 394 static void 395 powermac_smp_timebase_sync(platform_t plat, u_long tb, int ap) 396 { 397 398 mttb(tb); 399 } 400 401 static void 402 powermac_reset(platform_t platform) 403 { 404 OF_reboot(); 405 } 406 407 void 408 powermac_sleep(platform_t platform) 409 { 410 411 *(unsigned long *)0x80 = 0x100; 412 cpu_sleep(); 413 } 414