1 /*
2 * Copyright (c) 2006, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "logging/log.hpp"
27 #include "memory/allocation.hpp"
28 #include "memory/allocation.inline.hpp"
29 #include "runtime/os.hpp"
30 #include "vm_version_sparc.hpp"
31
32 #include <sys/auxv.h>
33 #include <sys/auxv_SPARC.h>
34 #include <sys/systeminfo.h>
35 #include <kstat.h>
36 #include <picl.h>
37 #include <dlfcn.h>
38 #include <link.h>
39
40 extern "C" static int PICL_visit_cpu_helper(picl_nodehdl_t nodeh, void *result);
41
42 // Functions from the library we need (signatures should match those in picl.h)
43 extern "C" {
44 typedef int (*picl_initialize_func_t)(void);
45 typedef int (*picl_shutdown_func_t)(void);
46 typedef int (*picl_get_root_func_t)(picl_nodehdl_t *nodehandle);
47 typedef int (*picl_walk_tree_by_class_func_t)(picl_nodehdl_t rooth,
48 const char *classname, void *c_args,
49 int (*callback_fn)(picl_nodehdl_t hdl, void *args));
50 typedef int (*picl_get_prop_by_name_func_t)(picl_nodehdl_t nodeh, const char *nm,
51 picl_prophdl_t *ph);
52 typedef int (*picl_get_propval_func_t)(picl_prophdl_t proph, void *valbuf, size_t sz);
53 typedef int (*picl_get_propinfo_func_t)(picl_prophdl_t proph, picl_propinfo_t *pi);
54 }
55
56 class PICL {
57 // Pointers to functions in the library
58 picl_initialize_func_t _picl_initialize;
59 picl_shutdown_func_t _picl_shutdown;
60 picl_get_root_func_t _picl_get_root;
61 picl_walk_tree_by_class_func_t _picl_walk_tree_by_class;
62 picl_get_prop_by_name_func_t _picl_get_prop_by_name;
63 picl_get_propval_func_t _picl_get_propval;
64 picl_get_propinfo_func_t _picl_get_propinfo;
65 // Handle to the library that is returned by dlopen
66 void *_dl_handle;
67
68 bool open_library();
69 void close_library();
70
71 template<typename FuncType> bool bind(FuncType& func, const char* name);
72 bool bind_library_functions();
73
74 // Get a value of the integer property. The value in the tree can be either 32 or 64 bit
75 // depending on the platform. The result is converted to int.
76 int get_int_property(picl_nodehdl_t nodeh, const char* name, int* result) {
77 picl_propinfo_t pinfo;
78 picl_prophdl_t proph;
79 if (_picl_get_prop_by_name(nodeh, name, &proph) != PICL_SUCCESS ||
80 _picl_get_propinfo(proph, &pinfo) != PICL_SUCCESS) {
81 return PICL_FAILURE;
82 }
83
84 if (pinfo.type != PICL_PTYPE_INT && pinfo.type != PICL_PTYPE_UNSIGNED_INT) {
85 assert(false, "Invalid property type");
86 return PICL_FAILURE;
87 }
88 if (pinfo.size == sizeof(int64_t)) {
89 int64_t val;
90 if (_picl_get_propval(proph, &val, sizeof(int64_t)) != PICL_SUCCESS) {
91 return PICL_FAILURE;
92 }
93 *result = static_cast<int>(val);
94 } else if (pinfo.size == sizeof(int32_t)) {
95 int32_t val;
96 if (_picl_get_propval(proph, &val, sizeof(int32_t)) != PICL_SUCCESS) {
97 return PICL_FAILURE;
98 }
99 *result = static_cast<int>(val);
100 } else {
101 assert(false, "Unexpected integer property size");
102 return PICL_FAILURE;
103 }
104 return PICL_SUCCESS;
105 }
106
107 // Visitor and a state machine that visits integer properties and verifies that the
108 // values are the same. Stores the unique value observed.
109 class UniqueValueVisitor {
110 PICL *_picl;
111 enum {
112 INITIAL, // Start state, no assignments happened
113 ASSIGNED, // Assigned a value
114 INCONSISTENT // Inconsistent value seen
115 } _state;
116 int _value;
117 public:
118 UniqueValueVisitor(PICL* picl) : _picl(picl), _state(INITIAL) { }
119 int value() {
120 assert(_state == ASSIGNED, "Precondition");
121 return _value;
122 }
123 void set_value(int value) {
124 assert(_state == INITIAL, "Precondition");
125 _value = value;
126 _state = ASSIGNED;
127 }
128 bool is_initial() { return _state == INITIAL; }
129 bool is_assigned() { return _state == ASSIGNED; }
130 bool is_inconsistent() { return _state == INCONSISTENT; }
131 void set_inconsistent() { _state = INCONSISTENT; }
132
133 bool visit(picl_nodehdl_t nodeh, const char* name) {
134 assert(!is_inconsistent(), "Precondition");
135 int curr;
136 if (_picl->get_int_property(nodeh, name, &curr) == PICL_SUCCESS) {
137 if (!is_assigned()) { // first iteration
138 set_value(curr);
139 } else if (curr != value()) { // following iterations
140 set_inconsistent();
141 }
142 return true;
143 }
144 return false;
145 }
146 };
147
148 class CPUVisitor {
149 UniqueValueVisitor _l1_visitor;
150 UniqueValueVisitor _l2_visitor;
151 int _limit; // number of times visit() can be run
152 public:
153 CPUVisitor(PICL *picl, int limit) : _l1_visitor(picl), _l2_visitor(picl), _limit(limit) {}
154 static int visit(picl_nodehdl_t nodeh, void *arg) {
155 CPUVisitor *cpu_visitor = static_cast<CPUVisitor*>(arg);
156 UniqueValueVisitor* l1_visitor = cpu_visitor->l1_visitor();
157 UniqueValueVisitor* l2_visitor = cpu_visitor->l2_visitor();
158 if (!l1_visitor->is_inconsistent()) {
159 l1_visitor->visit(nodeh, "l1-dcache-line-size");
160 }
161 static const char* l2_data_cache_line_property_name = NULL;
162 // On the first visit determine the name of the l2 cache line size property and memoize it.
163 if (l2_data_cache_line_property_name == NULL) {
164 assert(!l2_visitor->is_inconsistent(), "First iteration cannot be inconsistent");
165 l2_data_cache_line_property_name = "l2-cache-line-size";
166 if (!l2_visitor->visit(nodeh, l2_data_cache_line_property_name)) {
167 l2_data_cache_line_property_name = "l2-dcache-line-size";
168 l2_visitor->visit(nodeh, l2_data_cache_line_property_name);
169 }
170 } else {
171 if (!l2_visitor->is_inconsistent()) {
172 l2_visitor->visit(nodeh, l2_data_cache_line_property_name);
173 }
174 }
175
176 if (l1_visitor->is_inconsistent() && l2_visitor->is_inconsistent()) {
177 return PICL_WALK_TERMINATE;
178 }
179 cpu_visitor->_limit--;
180 if (cpu_visitor->_limit <= 0) {
181 return PICL_WALK_TERMINATE;
182 }
183 return PICL_WALK_CONTINUE;
184 }
185 UniqueValueVisitor* l1_visitor() { return &_l1_visitor; }
186 UniqueValueVisitor* l2_visitor() { return &_l2_visitor; }
187 };
188 int _L1_data_cache_line_size;
189 int _L2_data_cache_line_size;
190 public:
191 static int visit_cpu(picl_nodehdl_t nodeh, void *state) {
192 return CPUVisitor::visit(nodeh, state);
193 }
194
195 PICL(bool is_fujitsu, bool is_sun4v) : _L1_data_cache_line_size(0), _L2_data_cache_line_size(0), _dl_handle(NULL) {
196 if (!open_library()) {
197 return;
198 }
199 if (_picl_initialize() == PICL_SUCCESS) {
200 picl_nodehdl_t rooth;
201 if (_picl_get_root(&rooth) == PICL_SUCCESS) {
202 const char* cpu_class = "cpu";
203 // If it's a Fujitsu machine, it's a "core"
204 if (is_fujitsu) {
205 cpu_class = "core";
206 }
207 CPUVisitor cpu_visitor(this, (is_sun4v && !is_fujitsu) ? 1 : os::processor_count());
208 _picl_walk_tree_by_class(rooth, cpu_class, &cpu_visitor, PICL_visit_cpu_helper);
209 if (cpu_visitor.l1_visitor()->is_assigned()) { // Is there a value?
210 _L1_data_cache_line_size = cpu_visitor.l1_visitor()->value();
211 }
212 if (cpu_visitor.l2_visitor()->is_assigned()) {
213 _L2_data_cache_line_size = cpu_visitor.l2_visitor()->value();
214 }
215 }
216 _picl_shutdown();
217 }
218 close_library();
219 }
220
221 unsigned int L1_data_cache_line_size() const { return _L1_data_cache_line_size; }
222 unsigned int L2_data_cache_line_size() const { return _L2_data_cache_line_size; }
223 };
224
225
226 extern "C" static int PICL_visit_cpu_helper(picl_nodehdl_t nodeh, void *result) {
227 return PICL::visit_cpu(nodeh, result);
228 }
229
230 template<typename FuncType>
231 bool PICL::bind(FuncType& func, const char* name) {
232 func = reinterpret_cast<FuncType>(dlsym(_dl_handle, name));
233 return func != NULL;
234 }
235
236 bool PICL::bind_library_functions() {
237 assert(_dl_handle != NULL, "library should be open");
238 return bind(_picl_initialize, "picl_initialize" ) &&
239 bind(_picl_shutdown, "picl_shutdown" ) &&
240 bind(_picl_get_root, "picl_get_root" ) &&
241 bind(_picl_walk_tree_by_class, "picl_walk_tree_by_class") &&
242 bind(_picl_get_prop_by_name, "picl_get_prop_by_name" ) &&
243 bind(_picl_get_propval, "picl_get_propval" ) &&
244 bind(_picl_get_propinfo, "picl_get_propinfo" );
245 }
246
247 bool PICL::open_library() {
248 _dl_handle = dlopen("libpicl.so.1", RTLD_LAZY);
249 if (_dl_handle == NULL) {
250 return false;
251 }
252 if (!bind_library_functions()) {
253 assert(false, "unexpected PICL API change");
254 close_library();
255 return false;
256 }
257 return true;
258 }
259
260 void PICL::close_library() {
261 assert(_dl_handle != NULL, "library should be open");
262 dlclose(_dl_handle);
263 _dl_handle = NULL;
264 }
265
266 // We need to keep these here as long as we have to build on Solaris
267 // versions before 10.
268
269 #ifndef SI_ARCHITECTURE_32
270 #define SI_ARCHITECTURE_32 516 /* basic 32-bit SI_ARCHITECTURE */
271 #endif
272
273 #ifndef SI_ARCHITECTURE_64
274 #define SI_ARCHITECTURE_64 517 /* basic 64-bit SI_ARCHITECTURE */
275 #endif
276
277 #ifndef SI_CPUBRAND
278 #define SI_CPUBRAND 523 /* return cpu brand string */
279 #endif
280
281 class Sysinfo {
282 char* _string;
283 public:
284 Sysinfo(int si) : _string(NULL) {
285 char tmp;
286 size_t bufsize = sysinfo(si, &tmp, 1);
287
288 if (bufsize != -1) {
289 char* buf = (char*) os::malloc(bufsize, mtInternal);
290 if (buf != NULL) {
291 if (sysinfo(si, buf, bufsize) == bufsize) {
292 _string = buf;
293 } else {
294 os::free(buf);
295 }
296 }
297 }
298 }
299
300 ~Sysinfo() {
301 if (_string != NULL) {
302 os::free(_string);
303 }
304 }
305
306 const char* value() const {
307 return _string;
308 }
309
310 bool valid() const {
311 return _string != NULL;
312 }
313
314 bool match(const char* s) const {
315 return valid() ? strcmp(_string, s) == 0 : false;
316 }
317
318 bool match_substring(const char* s) const {
319 return valid() ? strstr(_string, s) != NULL : false;
320 }
321 };
322
323 class Sysconf {
324 int _value;
325 public:
326 Sysconf(int sc) : _value(-1) {
327 _value = sysconf(sc);
328 }
329 bool valid() const {
330 return _value != -1;
331 }
332 int value() const {
333 return _value;
334 }
335 };
336
337
338 #ifndef _SC_DCACHE_LINESZ
339 #define _SC_DCACHE_LINESZ 508 /* Data cache line size */
340 #endif
341
342 #ifndef _SC_L2CACHE_LINESZ
343 #define _SC_L2CACHE_LINESZ 527 /* Size of L2 cache line */
344 #endif
345
346 // Hardware capability bits that appeared after Solaris 11.1
347 #ifndef AV_SPARC_FMAF
348 #define AV_SPARC_FMAF 0x00000100 /* Fused Multiply-Add */
349 #endif
350 #ifndef AV2_SPARC_SPARC5
351 #define AV2_SPARC_SPARC5 0x00000008 /* The 29 new fp and sub instructions */
352 #endif
353
354 int VM_Version::platform_features(int features) {
355
356 // Check 32-bit architecture.
357 if (Sysinfo(SI_ARCHITECTURE_32).match("sparc")) {
358 features |= v8_instructions_m;
359 }
360
361 // Check 64-bit architecture.
362 if (Sysinfo(SI_ARCHITECTURE_64).match("sparcv9")) {
363 features |= generic_v9_m;
364 }
365
366 // Extract valid instruction set extensions.
367 uint_t avs[AV_HW2_IDX + 1];
368 uint_t avn = getisax(avs, ARRAY_SIZE(avs));
369
370 log_info(os, cpu)("getisax(2) returned %d words:", avn);
371 for (int i = 0; i < avn; i++) {
372 log_info(os, cpu)(" word %d: " PTR32_FORMAT, i, avs[i]);
373 }
374
375 uint_t av1 = avs[AV_HW1_IDX];
376 if (av1 & AV_SPARC_MUL32) features |= hardware_mul32_m;
377 if (av1 & AV_SPARC_DIV32) features |= hardware_div32_m;
378 if (av1 & AV_SPARC_FSMULD) features |= hardware_fsmuld_m;
379 if (av1 & AV_SPARC_V8PLUS) features |= v9_instructions_m;
380 if (av1 & AV_SPARC_POPC) features |= hardware_popc_m;
381 if (av1 & AV_SPARC_VIS) features |= vis1_instructions_m;
382 if (av1 & AV_SPARC_VIS2) features |= vis2_instructions_m;
383 if (av1 & AV_SPARC_ASI_BLK_INIT) features |= blk_init_instructions_m;
384 if (av1 & AV_SPARC_FMAF) features |= fmaf_instructions_m;
385 if (av1 & AV_SPARC_VIS3) features |= vis3_instructions_m;
386 if (av1 & AV_SPARC_CBCOND) features |= cbcond_instructions_m;
387 if (av1 & AV_SPARC_CRC32C) features |= crc32c_instruction_m;
388 if (av1 & AV_SPARC_AES) features |= aes_instructions_m;
389 if (av1 & AV_SPARC_SHA1) features |= sha1_instruction_m;
390 if (av1 & AV_SPARC_SHA256) features |= sha256_instruction_m;
391 if (av1 & AV_SPARC_SHA512) features |= sha512_instruction_m;
392
393 if (avn > AV_HW2_IDX) {
394 uint_t av2 = avs[AV_HW2_IDX];
395 if (av2 & AV2_SPARC_SPARC5) features |= sparc5_instructions_m;
396 }
397
398 // Determine the machine type.
399 if (Sysinfo(SI_MACHINE).match("sun4v")) {
400 features |= sun4v_m;
401 }
402
403 // If SI_CPUBRAND works, that means Solaris 12 API to get the cache line sizes
404 // is available to us as well
405 Sysinfo cpu_info(SI_CPUBRAND);
406 bool use_solaris_12_api = cpu_info.valid();
407 const char* impl = "unknown";
408 int impl_m = 0;
409 if (use_solaris_12_api) {
410 impl = cpu_info.value();
411 log_info(os, cpu)("Parsing CPU implementation from %s", impl);
412 impl_m = parse_features(impl);
413 } else {
414 // Otherwise use kstat to determine the machine type.
415 kstat_ctl_t* kc = kstat_open();
416 if (kc != NULL) {
417 kstat_t* ksp = kstat_lookup(kc, (char*)"cpu_info", -1, NULL);
418 if (ksp != NULL) {
419 if (kstat_read(kc, ksp, NULL) != -1 && ksp->ks_data != NULL) {
420 kstat_named_t* knm = (kstat_named_t *)ksp->ks_data;
421 for (int i = 0; i < ksp->ks_ndata; i++) {
422 if (strcmp((const char*)&(knm[i].name), "implementation") == 0) {
423 impl = KSTAT_NAMED_STR_PTR(&knm[i]);
424 log_info(os, cpu)("Parsing CPU implementation from %s", impl);
425 impl_m = parse_features(impl);
426 break;
427 }
428 }
429 }
430 }
431 kstat_close(kc);
432 }
433 }
434 assert(impl_m != 0, "Unknown CPU implementation %s", impl);
435 features |= impl_m;
436
437 bool is_sun4v = (features & sun4v_m) != 0;
438 if (use_solaris_12_api && is_sun4v) {
439 // If Solaris 12 API is supported and it's sun4v use sysconf() to get the cache line sizes
440 Sysconf l1_dcache_line_size(_SC_DCACHE_LINESZ);
441 if (l1_dcache_line_size.valid()) {
442 _L1_data_cache_line_size = l1_dcache_line_size.value();
443 }
444
445 Sysconf l2_dcache_line_size(_SC_L2CACHE_LINESZ);
446 if (l2_dcache_line_size.valid()) {
447 _L2_data_cache_line_size = l2_dcache_line_size.value();
448 }
449 } else {
450 // Otherwise figure out the cache line sizes using PICL
451 bool is_fujitsu = (features & sparc64_family_m) != 0;
452 PICL picl(is_fujitsu, is_sun4v);
453 _L1_data_cache_line_size = picl.L1_data_cache_line_size();
454 _L2_data_cache_line_size = picl.L2_data_cache_line_size();
455 }
456 return features;
457 }