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1 | // ========== Copyright Header Begin ========================================== |
2 | // | |
3 | // OpenSPARC T2 Processor File: csr_common.cc | |
4 | // Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. | |
5 | // DO NOT ALTER OR REMOVE COPYRIGHT NOTICES. | |
6 | // | |
7 | // The above named program is free software; you can redistribute it and/or | |
8 | // modify it under the terms of the GNU General Public | |
9 | // License version 2 as published by the Free Software Foundation. | |
10 | // | |
11 | // The above named program is distributed in the hope that it will be | |
12 | // useful, but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | // General Public License for more details. | |
15 | // | |
16 | // You should have received a copy of the GNU General Public | |
17 | // License along with this work; if not, write to the Free Software | |
18 | // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. | |
19 | // | |
20 | // ========== Copyright Header End ============================================ | |
21 | /* | |
22 | * Copyright (c) 2003-2004 by Sun Microsystems, Inc. | |
23 | * All rights reserved. | |
24 | */ | |
25 | ||
26 | #include "csr_common.h" | |
27 | #include "string.h" | |
28 | #include "assert.h" | |
29 | ||
30 | /******************************************************************************* | |
31 | * csr_get_reg | |
32 | * | |
33 | * Given a register's offset, find the register in the given list of | |
34 | * registers. If it does not exist, create it and insert it in the | |
35 | * list. | |
36 | */ | |
37 | csr_reg_t * | |
38 | common_csr::csr_get_reg (csr_reg_t **csr_list, uint64_t offset,csrtab_t *csrtab,csr_field_t *csr_fields,uint64_t *cumsum) | |
39 | { | |
40 | return csr_get_regtype(csr_list, csr_offset2reg(offset),csrtab,csr_fields,cumsum); | |
41 | ||
42 | } /* csr_get_reg */ | |
43 | ||
44 | /******************************************************************************* | |
45 | * csr_get_regtype | |
46 | * | |
47 | * Given a register's type, find the register in the given list of | |
48 | * registers. If it does not exist, create it and insert it in the | |
49 | * list. | |
50 | */ | |
51 | csr_reg_t * | |
52 | common_csr::csr_get_regtype (csr_reg_t **csr_list, csr_reg_type_t reg_type,csrtab_t *csrtab,csr_field_t *csr_fields,uint64_t *cumsum) | |
53 | { | |
54 | csr_reg_t *p=NULL, **pb=NULL, *new_csr=NULL; | |
55 | assert(csr_list); | |
56 | ||
57 | for (pb = csr_list; (p = *pb) != NULL; pb = (csr_reg_t **)&p->next) | |
58 | if (reg_type <= p->reg_type) | |
59 | break; | |
60 | ||
61 | if (p && reg_type == p->reg_type) | |
62 | return p; | |
63 | ||
64 | new_csr = (csr_reg_t *)new csr_reg_t; | |
65 | ||
66 | init_csr_reg (new_csr, reg_type,csrtab,csr_fields,cumsum); | |
67 | ||
68 | new_csr->next = p; | |
69 | *pb = new_csr; | |
70 | ||
71 | return new_csr; | |
72 | ||
73 | ||
74 | } /* csr_get_regtype */ | |
75 | ||
76 | /******************************************************************************* | |
77 | * csr_read_reg | |
78 | * | |
79 | * Read csr from its storage object | |
80 | */ | |
81 | int | |
82 | common_csr::csr_read_reg (Module *csr_obj, csr_reg_t *csr_reg, uint64_t offset, | |
83 | uint64_t *value) | |
84 | { | |
85 | int idx = (int)((offset - csr_reg->offset) / 8); | |
86 | if(idx >=0){ | |
87 | if(csr_obj){ | |
88 | csr_obj->debug_more("%s: csr_read_reg:%s value:%016llx\n",csr_obj->getName(), csr_reg->name,csr_reg->value[idx]); | |
89 | } | |
90 | *value = csr_reg->value[idx]; | |
91 | return TRUE; | |
92 | } | |
93 | csr_obj->debug_err("%s:csr_read_reg :%s invalid offset:%016llx\n",csr_obj->getName(), csr_reg->name,offset); | |
94 | return FALSE; | |
95 | } /* csr_read_reg */ | |
96 | ||
97 | /******************************************************************************* | |
98 | * csr_write_reg | |
99 | * | |
100 | * Write csr to its storage object | |
101 | */ | |
102 | int | |
103 | common_csr::csr_write_reg (Module *csr_obj, csr_reg_t *csr_reg, uint64_t offset, | |
104 | uint64_t reg_value) | |
105 | { | |
106 | int idx = (int)((offset - csr_reg->offset) / 8); | |
107 | if(idx >= 0){ | |
108 | csr_reg->value[idx] = reg_value; | |
109 | ||
110 | if(csr_obj){ | |
111 | csr_obj->debug_more("%s:csr_write_reg :%s value:%016llx\n",csr_obj->getName(), csr_reg->name,reg_value); | |
112 | } | |
113 | return TRUE; | |
114 | } | |
115 | csr_obj->debug_err("%s:csr_write_reg :%s invalid offset:%016llx\n",csr_obj->getName(), csr_reg->name,offset); | |
116 | return FALSE; | |
117 | } /* csr_write_reg */ | |
118 | ||
119 | /******************************************************************************* | |
120 | * csr_get_field | |
121 | * | |
122 | * Given a register's field name, extract its value | |
123 | */ | |
124 | uint64_t | |
125 | common_csr::csr_get_field(Module *csr_obj, csr_reg_t *csr_reg, const char *field_name, | |
126 | uint64_t offset) | |
127 | { | |
128 | int i; | |
129 | uint64_t reg_value = 0; | |
130 | ||
131 | csr_read_reg(csr_obj, csr_reg, offset, ®_value); | |
132 | ||
133 | for (i = 0; i < csr_reg->num_fields; i++) { | |
134 | if (!strcmp(csr_reg->fields[i].name, field_name)) { | |
135 | uint64_t mask; | |
136 | ||
137 | mask = LWord(-1) >> | |
138 | (63 - (csr_reg->fields[i].l - csr_reg->fields[i].r)); | |
139 | ||
140 | reg_value >>= csr_reg->fields[i].r; | |
141 | reg_value &= mask; | |
142 | ||
143 | if (csr_obj) | |
144 | csr_obj->debug_more("%s:Get field %s.%s: 0x%llx\n", csr_obj->getName(),csr_reg->name, field_name, reg_value); | |
145 | return reg_value; | |
146 | } | |
147 | } | |
148 | if (csr_obj) | |
149 | csr_obj->debug_err("%s:unknown field '%s' in register '%s'\n",csr_obj->getName(),field_name, csr_reg->name); | |
150 | return 0; | |
151 | ||
152 | } /* csr_get_field */ | |
153 | ||
154 | /******************************************************************************* | |
155 | * csr_set_field | |
156 | * | |
157 | * Given a register's field name, set its value | |
158 | */ | |
159 | uint64_t | |
160 | common_csr::csr_set_field(Module *csr_obj, csr_reg_t *csr_reg, const char *field_name , | |
161 | uint64_t field_value, uint64_t offset) | |
162 | { | |
163 | int i; | |
164 | uint64_t reg_value = 0; | |
165 | ||
166 | csr_read_reg(csr_obj, csr_reg, offset, ®_value); | |
167 | ||
168 | for (i = 0; i < csr_reg->num_fields; i++) { | |
169 | if (!strcmp(csr_reg->fields[i].name, field_name)) { | |
170 | uint64_t maskl = | |
171 | LWord(-1) >> (63 - csr_reg->fields[i].l); | |
172 | uint64_t maskr = | |
173 | LWord(-1) << (csr_reg->fields[i].r); | |
174 | uint64_t mask = maskl & maskr; | |
175 | ||
176 | if (csr_obj) | |
177 | csr_obj->debug_more("%s:Set field %s.%s: 0x%llx\n",csr_obj->getName(),csr_reg->name, field_name, field_value); | |
178 | ||
179 | field_value <<= csr_reg->fields[i].r; | |
180 | field_value &= mask; | |
181 | ||
182 | reg_value &= ~mask; | |
183 | reg_value |= field_value; | |
184 | ||
185 | csr_write_reg(csr_obj, csr_reg, offset, reg_value); | |
186 | return reg_value; | |
187 | } | |
188 | } | |
189 | ||
190 | if (csr_obj) | |
191 | csr_obj->debug_err("%s:unknown field '%s' in register '%s'\n",csr_obj->getName(), field_name, csr_reg->name); | |
192 | ||
193 | return reg_value; | |
194 | ||
195 | } /* csr_set_field */ | |
196 | ||
197 | /******************************************************************************* | |
198 | * csr_get_reg_by_name | |
199 | * Given a register's name, get its regtype | |
200 | * Return -1 if not found. | |
201 | */ | |
202 | csr_reg_type_t | |
203 | common_csr::csr_get_reg_by_name(char *regname,csrtab_t *csrtab,uint64_t ncsrtab) | |
204 | { | |
205 | int64_t i; | |
206 | ||
207 | for (i = ncsrtab; 0 <= --i; ) | |
208 | if (!strcmp(regname, csrtab[i].name)) | |
209 | return csrtab[i].type; | |
210 | ||
211 | return (csr_reg_type_t)(-1); | |
212 | ||
213 | } /* csr_get_reg_by_name */ | |
214 | ||
215 | /* | |
216 | * csr_value_get_field | |
217 | * | |
218 | * Side-effect free way to extract a value of a register's field. csr_reg must | |
219 | * point to a valid register object, but its value will be ignored: instead, | |
220 | * 'reg_value' will be used. | |
221 | */ | |
222 | uint64_t | |
223 | common_csr::csr_value_get_field(Module *csr_obj, csr_reg_t *csr_reg, | |
224 | const char *field_name, uint64_t reg_value) | |
225 | { | |
226 | int i; | |
227 | for (i = 0; i < csr_reg->num_fields; i++) { | |
228 | if (!strcmp(csr_reg->fields[i].name, field_name)) { | |
229 | uint64_t mask; | |
230 | ||
231 | mask = LWord(-1) >> | |
232 | (63 - (csr_reg->fields[i].l - csr_reg->fields[i].r)); | |
233 | ||
234 | reg_value >>= csr_reg->fields[i].r; | |
235 | reg_value &= mask; | |
236 | ||
237 | if(csr_obj){ | |
238 | csr_obj->debug_more("%s:Get field %s.%s: 0x%llx\n",csr_obj->getName(),csr_reg->name, field_name, reg_value); | |
239 | } | |
240 | ||
241 | return reg_value; | |
242 | } | |
243 | } | |
244 | ||
245 | if(csr_obj){ | |
246 | csr_obj->debug_err("%s:unknown field '%s' in register '%s'\n", csr_obj->getName(),field_name, csr_reg->name); | |
247 | } | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
252 | /* | |
253 | * csr_field_changed | |
254 | * | |
255 | * Returns true if the field specified by 'field_name' for the given register | |
256 | * object has changed values between 'reg_value1' and 'reg_value2' | |
257 | */ | |
258 | int | |
259 | common_csr::csr_field_changed(Module *csr_obj, csr_reg_t *csr_reg, | |
260 | const char *field_name, | |
261 | uint64_t reg_value1, uint64_t reg_value2) | |
262 | { | |
263 | uint64_t first, second; | |
264 | ||
265 | first = csr_value_get_field(csr_obj, csr_reg, field_name, reg_value1); | |
266 | second = csr_value_get_field(csr_obj, csr_reg, field_name, reg_value2); | |
267 | ||
268 | return first != second; | |
269 | } | |
270 | ||
271 | ||
272 | /******************************************************************************* | |
273 | * csr_get_field_name | |
274 | * | |
275 | * Given 'csr_reg' and 'reg_value', check the field at the given 'bit' position | |
276 | * and return the field name if that bit field is set. | |
277 | */ | |
278 | const char * | |
279 | common_csr::csr_get_field_name(Module *csr_obj, csr_reg_t *csr_reg, int bit, uint64_t reg_value) | |
280 | { | |
281 | uint64_t mask, bit_value; | |
282 | const char *name = NULL; | |
283 | ||
284 | mask = LWord(-1) >> | |
285 | (63 - (csr_reg->fields[bit].l - csr_reg->fields[bit].r)); | |
286 | ||
287 | bit_value = (reg_value >> csr_reg->fields[bit].r) & mask; | |
288 | ||
289 | if (bit_value) { | |
290 | name = csr_reg->fields[bit].name; | |
291 | ||
292 | if (csr_obj) | |
293 | csr_obj->debug_more("%s:Get field name %s.%s: 0x%llx\n",csr_obj->getName(),csr_reg->name, name, reg_value); | |
294 | } | |
295 | ||
296 | return name; | |
297 | ||
298 | } /* csr_get_field_name*/ | |
299 | ||
300 | /******************************************************************************* | |
301 | * csr_reset_reg | |
302 | * | |
303 | * Write the csr reset value to its storage object | |
304 | */ | |
305 | bool | |
306 | common_csr::csr_reset_reg(Module *csr_obj, csr_reg_t **csr_list,uint64_t value, csr_reg_type_t type,csrtab_t *csrtab,csr_field_t *csr_fields,uint64_t *cumsum, uint64_t offset) | |
307 | { | |
308 | bool rc = FALSE; | |
309 | csr_reg_t *csr_reg; | |
310 | ||
311 | csr_reg = csr_get_regtype(csr_list, type,csrtab,csr_fields,cumsum); | |
312 | rc = csr_write_reg(csr_obj, csr_reg, offset, value); | |
313 | ||
314 | return rc; | |
315 | ||
316 | } /* csr_reset_reg */ | |
317 | ||
318 | ||
319 | /******************************************************************************* | |
320 | * csr_write_mask_reg | |
321 | * | |
322 | * This function operates on a pair of aliased CSRs whose types are indicated | |
323 | * by the input value of the last three arguments either as | |
324 | * | |
325 | * case A: (rw1c, rw1s, 0) | |
326 | * or | |
327 | * case B: (rw1c, 0, rw) | |
328 | * | |
329 | * For either case, it computes the new value of the given aliased register | |
330 | * csr_reg whose type is one of the rw1c, rw1c and rw, and updates both the | |
331 | * aliased registers. The purpose is to keep the stored csr value of the pair | |
332 | * in sync so either one can be used for the corresponding read op). | |
333 | */ | |
334 | bool | |
335 | common_csr::csr_write_mask_reg(Module *csr_obj, csr_reg_t **csr_list,csr_reg_type_t type,csrtab_t *csrtab,csr_field_t *csr_fields,uint64_t *cumsum,uint64_t old_value, uint64_t *new_value, csr_reg_type_t rw1c, csr_reg_type_t rw1s, csr_reg_type_t rw, uint64_t offset) | |
336 | { | |
337 | csr_reg_t *csr_reg_alias; | |
338 | bool rc = FALSE; | |
339 | ||
340 | if (type == rw1c) { | |
341 | *new_value = old_value & ~*new_value; | |
342 | ||
343 | csr_reg_alias = csr_get_regtype(csr_list, rw1s ? rw1s : rw,csrtab,csr_fields,cumsum); | |
344 | } | |
345 | else { | |
346 | if (type == rw1s) | |
347 | *new_value = old_value | *new_value; | |
348 | ||
349 | csr_reg_alias = csr_get_regtype(csr_list, rw1c,csrtab,csr_fields,cumsum); | |
350 | } | |
351 | ||
352 | assert(csr_reg_alias->depth == 1); | |
353 | rc = csr_write_reg(csr_obj, csr_reg_alias, csr_reg_alias->offset, *new_value); | |
354 | ||
355 | // update the actual register as well. | |
356 | csr_reg_t * csr_reg = csr_get_regtype(csr_list,type,csrtab,csr_fields,cumsum); | |
357 | rc |= csr_write_reg(csr_obj,csr_reg,csr_reg->offset, *new_value); | |
358 | ||
359 | return rc; | |
360 | ||
361 | } /* csr_write_mask_reg */ | |
362 | ||
363 | ||
364 | ||
365 | /******************************************************************************* | |
366 | * csr_set_mask_field | |
367 | * | |
368 | * This function operates on a pair of aliased CSR 'csr_reg' of type | |
369 | * | |
370 | * ('rw1c', 'rw'). | |
371 | * | |
372 | * Given the 'field_name' and 'field_value', it computes the new value of the | |
373 | * given CSR 'csr_reg' in terms of its type (either rw1c or rw), and stores | |
374 | * the new value in the storage for both CSRs. The purpose is to keep the | |
375 | * stored csr value of the pair in sync so either one can be used for the | |
376 | * corresponding read op. | |
377 | */ | |
378 | bool | |
379 | common_csr::csr_set_mask_field(Module *csr_obj,csr_reg_t **csr_list,csrtab_t *csrtab,csr_field_t *csr_fields,uint64_t *cumsum,csr_reg_t *csr_reg,const char *field_name,uint64_t field_value, csr_reg_type_t rw1c, csr_reg_type_t rw, uint64_t offset) | |
380 | { | |
381 | int i; | |
382 | uint64_t old_value = 0, new_value; | |
383 | bool rc = FALSE; | |
384 | ||
385 | /* read the old value in csr_reg */ | |
386 | // csr_read_reg(csr_obj, csr_reg, offset, &old_value); | |
387 | ||
388 | csr_reg_t* csr_rw1c = csr_get_regtype(csr_list,rw1c,csrtab,csr_fields,cumsum); | |
389 | csr_set_field(csr_obj,csr_rw1c,field_name,field_value,csr_rw1c->offset); | |
390 | csr_reg_t* csr_rw = csr_get_regtype(csr_list,rw,csrtab,csr_fields,cumsum); | |
391 | csr_set_field(csr_obj,csr_rw,field_name,field_value,csr_rw->offset); | |
392 | ||
393 | /* left shift the field_value to a 64 bit value */ | |
394 | /* for (i = 0; i < csr_reg->num_fields; i++) { | |
395 | if (!strcmp(csr_reg->fields[i].name, field_name)) { | |
396 | uint64_t maskl = | |
397 | UINT64_C(-1) >> (63 - csr_reg->fields[i].l); | |
398 | uint64_t maskr = | |
399 | UINT64_C(-1) << (csr_reg->fields[i].r); | |
400 | uint64_t mask = maskl & maskr; | |
401 | ||
402 | new_value = field_value << csr_reg->fields[i].r; | |
403 | new_value &= mask; | |
404 | break; | |
405 | } | |
406 | } | |
407 | */ | |
408 | /* | |
409 | * computes the new_value of the given register 'csr_reg' and update | |
410 | * the other aliased register | |
411 | */ | |
412 | // rc = csr_write_mask_reg(csr_obj, csr_list,csr_reg->reg_type,csrtab,csr_fields,cumsum,old_value,&new_value, rw1c, 0, rw, offset); | |
413 | ||
414 | /* | |
415 | * finally update the given register with the new_value | |
416 | */ | |
417 | //rc = csr_write_reg(csr_obj, csr_reg, offset, new_value); | |
418 | ||
419 | if (csr_obj){ | |
420 | csr_obj->debug_more("%s:csr_set_mask_field:Set field '%s' in register '%s','%s'\n", csr_obj->getName() ,field_name, csr_rw->name,csr_rw1c->name); | |
421 | } | |
422 | ||
423 | return rc; | |
424 | ||
425 | } /* csr_set_mask_field */ | |
426 | ||
427 | void | |
428 | common_csr::init_csr_reg (csr_reg_t *csr_reg, csr_reg_type_t reg_type,csrtab_t *csrtab,csr_field_t *csr_fields, uint64_t *cumsum) { | |
429 | ||
430 | int i; | |
431 | /* initialize the structure */ | |
432 | csr_reg->reg_type = reg_type; | |
433 | csr_reg->name = csrtab[reg_type].name; | |
434 | csr_reg->offset = csrtab[reg_type].offset; | |
435 | csr_reg->read_mask = csrtab[reg_type].read_mask; | |
436 | csr_reg->read_only_mask = csrtab[reg_type].read_only_mask; | |
437 | csr_reg->write_mask = csrtab[reg_type].write_mask; | |
438 | csr_reg->write_only_mask = csrtab[reg_type].write_only_mask; | |
439 | csr_reg->clear_mask = csrtab[reg_type].clear_mask; | |
440 | csr_reg->set_mask = csrtab[reg_type].set_mask; | |
441 | csr_reg->power_on_reset = csrtab[reg_type].power_on_reset; | |
442 | csr_reg->depth = csrtab[reg_type].depth; | |
443 | csr_reg->num_fields = csrtab[reg_type].num_fields; | |
444 | csr_reg->value = (uint64_t *)new uint64_t[csrtab[reg_type].depth]; | |
445 | for(i=0; i<csrtab[reg_type].depth; i++) { | |
446 | csr_reg->value[i] = csr_reg->power_on_reset; | |
447 | } | |
448 | csr_reg->fields = (csr_field_t *) new csr_field_t[(csrtab[reg_type].num_fields)]; | |
449 | for(i=0; i<csrtab[reg_type].num_fields; i++) { | |
450 | csr_reg->fields[i].name = csr_fields[cumsum[reg_type]+i].name; | |
451 | csr_reg->fields[i].l = csr_fields[cumsum[reg_type]+i].l; | |
452 | csr_reg->fields[i].r = csr_fields[cumsum[reg_type]+i].r; | |
453 | } | |
454 | csr_reg->sp_access = csrtab[reg_type].sp_access; | |
455 | csr_reg->jtag_access = csrtab[reg_type].jtag_access; | |
456 | csr_reg->domain_access = csrtab[reg_type].domain_access; | |
457 | csr_reg->next = NULL; | |
458 | ||
459 | } /* init_csr_reg */ | |
460 | ||
461 | ||
462 |