?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
new "stellaris recover" command
[openocd/dave.git] / src / target / feroceon.c
blobe0c3c3954480f3dc6118ae9d54f50c2561bd8db4
1 /***************************************************************************
2 * Copyright (C) 2008-2009 by Marvell Semiconductors, Inc. *
3 * Written by Nicolas Pitre <nico@marvell.com> *
4 * *
5 * Copyright (C) 2008 by Hongtao Zheng *
6 * hontor@126.com *
7 * *
8 * This program is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU General Public License as published by *
10 * the Free Software Foundation; either version 2 of the License, or *
11 * (at your option) any later version. *
12 * *
13 * This program is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16 * GNU General Public License for more details. *
17 * *
18 * You should have received a copy of the GNU General Public License *
19 * along with this program; if not, write to the *
20 * Free Software Foundation, Inc., *
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
22 ***************************************************************************/
23
24 /*
25 * Marvell Feroceon/Dragonite support.
26 *
27 * The Feroceon core, as found in the Orion and Kirkwood SoCs amongst others,
28 * mimics the ARM926 ICE interface with the following differences:
29 *
30 * - the MOE (method of entry) reporting is not implemented
31 *
32 * - breakpoint/watchpoint comparator #1 is seemingly not implemented
33 *
34 * - due to a different pipeline implementation, some injected debug
35 * instruction sequences have to be somewhat different
36 *
37 * Other issues:
38 *
39 * - asserting DBGRQ doesn't work if target is looping on the undef vector
40 *
41 * - the EICE version signature in the COMMS_CTL reg is next to the flow bits
42 * not at the top, and rather meaningless due to existing discrepencies
43 *
44 * - the DCC channel is half duplex (only one FIFO for both directions) with
45 * seemingly no proper flow control.
46 *
47 * The Dragonite core is the non-mmu version based on the ARM966 model, and
48 * it shares the above issues as well.
49 */
50
51 #ifdef HAVE_CONFIG_H
52 #include "config.h"
53 #endif
54
55 #include "arm926ejs.h"
56 #include "arm966e.h"
57 #include "target_type.h"
58 #include "register.h"
59 #include "arm_opcodes.h"
60
61
62 int feroceon_assert_reset(struct target *target)
63 {
64 struct arm *armv4_5 = target->arch_info;
65 struct arm7_9_common *arm7_9 = armv4_5->arch_info;
66 int ud = arm7_9->use_dbgrq;
67
68 arm7_9->use_dbgrq = 0;
69 if (target->reset_halt)
70 arm7_9_halt(target);
71 arm7_9->use_dbgrq = ud;
72 return arm7_9_assert_reset(target);
73 }
74
75 int feroceon_dummy_clock_out(struct arm_jtag *jtag_info, uint32_t instr)
76 {
77 struct scan_field fields[3];
78 uint8_t out_buf[4];
79 uint8_t instr_buf[4];
80 uint8_t sysspeed_buf = 0x0;
81
82 /* prepare buffer */
83 buf_set_u32(out_buf, 0, 32, 0);
84
85 buf_set_u32(instr_buf, 0, 32, flip_u32(instr, 32));
86
87 jtag_set_end_state(TAP_DRPAUSE);
88 arm_jtag_scann(jtag_info, 0x1);
89
90 arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
91
92 fields[0].tap = jtag_info->tap;
93 fields[0].num_bits = 32;
94 fields[0].out_value = out_buf;
95 fields[0].in_value = NULL;
96
97 fields[1].tap = jtag_info->tap;
98 fields[1].num_bits = 3;
99 fields[1].out_value = &sysspeed_buf;
100 fields[1].in_value = NULL;
101
102 fields[2].tap = jtag_info->tap;
103 fields[2].num_bits = 32;
104 fields[2].out_value = instr_buf;
105 fields[2].in_value = NULL;
106
107 jtag_add_dr_scan(3, fields, jtag_get_end_state());
108
109 /* no jtag_add_runtest(0, jtag_get_end_state()) here */
110
111 return ERROR_OK;
112 }
113
114 void feroceon_change_to_arm(struct target *target, uint32_t *r0, uint32_t *pc)
115 {
116 struct arm *armv4_5 = target->arch_info;
117 struct arm7_9_common *arm7_9 = armv4_5->arch_info;
118 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
119
120 /*
121 * save r0 before using it and put system in ARM state
122 * to allow common handling of ARM and THUMB debugging
123 */
124
125 feroceon_dummy_clock_out(jtag_info, ARMV4_5_T_NOP);
126 feroceon_dummy_clock_out(jtag_info, ARMV4_5_T_NOP);
127 feroceon_dummy_clock_out(jtag_info, ARMV4_5_T_NOP);
128
129 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_STR(0, 0), 0, NULL, 0);
130 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
131 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
132 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, r0, 0);
133 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
134 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
135
136 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_MOV(0, 15), 0, NULL, 0);
137 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_STR(0, 0), 0, NULL, 0);
138 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
139 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
140 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, pc, 0);
141 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
142 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
143
144 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_BX(15), 0, NULL, 0);
145 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
146 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
147 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
148 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
149
150 jtag_execute_queue();
151
152 /*
153 * fix program counter:
154 * MOV R0, PC was the 7th instruction (+12)
155 * reading PC in Thumb state gives address of instruction + 4
156 */
157 *pc -= (12 + 4);
158 }
159
160 void feroceon_read_core_regs(struct target *target, uint32_t mask, uint32_t* core_regs[16])
161 {
162 int i;
163 struct arm *armv4_5 = target->arch_info;
164 struct arm7_9_common *arm7_9 = armv4_5->arch_info;
165 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
166
167 arm9tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), 0, NULL, 0);
168 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
169 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
170
171 for (i = 0; i <= 15; i++)
172 if (mask & (1 << i))
173 arm9tdmi_clock_data_in(jtag_info, core_regs[i]);
174
175 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
176 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
177 }
178
179 void feroceon_read_core_regs_target_buffer(struct target *target, uint32_t mask, void* buffer, int size)
180 {
181 int i;
182 struct arm *armv4_5 = target->arch_info;
183 struct arm7_9_common *arm7_9 = armv4_5->arch_info;
184 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
185 int be = (target->endianness == TARGET_BIG_ENDIAN) ? 1 : 0;
186 uint32_t *buf_u32 = buffer;
187 uint16_t *buf_u16 = buffer;
188 uint8_t *buf_u8 = buffer;
189
190 arm9tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), 0, NULL, 0);
191 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
192 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
193
194 for (i = 0; i <= 15; i++)
195 {
196 if (mask & (1 << i)) {
197 switch (size)
198 {
199 case 4:
200 arm9tdmi_clock_data_in_endianness(jtag_info, buf_u32++, 4, be);
201 break;
202 case 2:
203 arm9tdmi_clock_data_in_endianness(jtag_info, buf_u16++, 2, be);
204 break;
205 case 1:
206 arm9tdmi_clock_data_in_endianness(jtag_info, buf_u8++, 1, be);
207 break;
208 }
209 }
210 }
211
212 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
213 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
214 }
215
216 void feroceon_read_xpsr(struct target *target, uint32_t *xpsr, int spsr)
217 {
218 struct arm *armv4_5 = target->arch_info;
219 struct arm7_9_common *arm7_9 = armv4_5->arch_info;
220 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
221
222 arm9tdmi_clock_out(jtag_info, ARMV4_5_MRS(0, spsr & 1), 0, NULL, 0);
223 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
224 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
225 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
226 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
227 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
228 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
229
230 arm9tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, 1, 0, 0), 0, NULL, 0);
231 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
232 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
233 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, xpsr, 0);
234
235 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
236 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
237 }
238
239 void feroceon_write_xpsr(struct target *target, uint32_t xpsr, int spsr)
240 {
241 struct arm *armv4_5 = target->arch_info;
242 struct arm7_9_common *arm7_9 = armv4_5->arch_info;
243 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
244
245 LOG_DEBUG("xpsr: %8.8" PRIx32 ", spsr: %i", xpsr, spsr);
246
247 arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr & 0xff, 0, 1, spsr), 0, NULL, 0);
248 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
249 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
250 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
251 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
252 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
253 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
254
255 arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff00) >> 8, 0xc, 2, spsr), 0, NULL, 0);
256 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
257 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
258 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
259 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
260 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
261 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
262
263 arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff0000) >> 16, 0x8, 4, spsr), 0, NULL, 0);
264 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
265 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
266 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
267 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
268 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
269 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
270
271 arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff000000) >> 24, 0x4, 8, spsr), 0, NULL, 0);
272 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
273 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
274 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
275 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
276 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
277 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
278 }
279
280 void feroceon_write_xpsr_im8(struct target *target, uint8_t xpsr_im, int rot, int spsr)
281 {
282 struct arm *armv4_5 = target->arch_info;
283 struct arm7_9_common *arm7_9 = armv4_5->arch_info;
284 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
285
286 LOG_DEBUG("xpsr_im: %2.2x, rot: %i, spsr: %i", xpsr_im, rot, spsr);
287
288 arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr_im, rot, 1, spsr), 0, NULL, 0);
289 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
290 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
291 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
292 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
293 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
294 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
295 }
296
297 void feroceon_write_core_regs(struct target *target, uint32_t mask, uint32_t core_regs[16])
298 {
299 int i;
300 struct arm *armv4_5 = target->arch_info;
301 struct arm7_9_common *arm7_9 = armv4_5->arch_info;
302 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
303
304 arm9tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 0), 0, NULL, 0);
305 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
306 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
307
308 for (i = 0; i <= 15; i++)
309 if (mask & (1 << i))
310 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, core_regs[i], NULL, 0);
311
312 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
313 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
314 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
315 }
316
317 void feroceon_branch_resume(struct target *target)
318 {
319 struct arm *armv4_5 = target->arch_info;
320 struct arm7_9_common *arm7_9 = armv4_5->arch_info;
321 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
322
323 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
324 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
325 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
326 arm9tdmi_clock_out(jtag_info, ARMV4_5_B(0xfffff9, 0), 0, NULL, 0);
327 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
328
329 arm7_9->need_bypass_before_restart = 1;
330 }
331
332 void feroceon_branch_resume_thumb(struct target *target)
333 {
334 LOG_DEBUG("-");
335
336 struct arm *armv4_5 = target->arch_info;
337 struct arm7_9_common *arm7_9 = armv4_5->arch_info;
338 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
339 uint32_t r0 = buf_get_u32(armv4_5->core_cache->reg_list[0].value, 0, 32);
340 uint32_t pc = buf_get_u32(armv4_5->pc->value, 0, 32);
341
342 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
343 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
344 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
345 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
346
347 arm9tdmi_clock_out(jtag_info, 0xE28F0001, 0, NULL, 0); // add r0,pc,#1
348 arm9tdmi_clock_out(jtag_info, ARMV4_5_BX(0), 0, NULL, 0);
349 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
350 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
351
352 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_LDMIA(0, 0x1), 0, NULL, 0);
353 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
354 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
355
356 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, r0, NULL, 0);
357 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
358 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
359
360 pc = (pc & 2) >> 1;
361 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_B(0x7e9 + pc), 0, NULL, 0);
362 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 1);
363
364 arm7_9->need_bypass_before_restart = 1;
365 }
366
367 int feroceon_read_cp15(struct target *target, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t *value)
368 {
369 struct arm *armv4_5 = target->arch_info;
370 struct arm7_9_common *arm7_9 = armv4_5->arch_info;
371 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
372 int err;
373
374 arm9tdmi_clock_out(jtag_info, ARMV4_5_MRC(15, op1, 0, CRn, CRm, op2), 0, NULL, 0);
375 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
376 err = arm7_9_execute_sys_speed(target);
377 if (err != ERROR_OK)
378 return err;
379
380 arm9tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, 1, 0, 0), 0, NULL, 0);
381 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
382 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
383 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, value, 0);
384 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
385 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
386 return jtag_execute_queue();
387 }
388
389 int feroceon_write_cp15(struct target *target, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t value)
390 {
391 struct arm *armv4_5 = target->arch_info;
392 struct arm7_9_common *arm7_9 = armv4_5->arch_info;
393 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
394
395 arm9tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 1, 0, 0), 0, NULL, 0);
396 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
397 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
398 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, value, NULL, 0);
399 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
400 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
401 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
402
403 arm9tdmi_clock_out(jtag_info, ARMV4_5_MCR(15, op1, 0, CRn, CRm, op2), 0, NULL, 0);
404 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
405 return arm7_9_execute_sys_speed(target);
406 }
407
408 void feroceon_set_dbgrq(struct target *target)
409 {
410 struct arm *armv4_5 = target->arch_info;
411 struct arm7_9_common *arm7_9 = armv4_5->arch_info;
412 struct reg *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
413
414 buf_set_u32(dbg_ctrl->value, 0, 8, 2);
415 embeddedice_store_reg(dbg_ctrl);
416 }
417
418 void feroceon_enable_single_step(struct target *target, uint32_t next_pc)
419 {
420 struct arm *armv4_5 = target->arch_info;
421 struct arm7_9_common *arm7_9 = armv4_5->arch_info;
422
423 /* set a breakpoint there */
424 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_VALUE], next_pc);
425 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0);
426 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffff);
427 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x100);
428 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], 0xf7);
429 }
430
431 void feroceon_disable_single_step(struct target *target)
432 {
433 struct arm *armv4_5 = target->arch_info;
434 struct arm7_9_common *arm7_9 = armv4_5->arch_info;
435
436 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_VALUE]);
437 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK]);
438 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK]);
439 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK]);
440 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE]);
441 }
442
443 int feroceon_examine_debug_reason(struct target *target)
444 {
445 /* the MOE is not implemented */
446 if (target->debug_reason != DBG_REASON_SINGLESTEP)
447 {
448 target->debug_reason = DBG_REASON_DBGRQ;
449 }
450
451 return ERROR_OK;
452 }
453
454 int feroceon_bulk_write_memory(struct target *target, uint32_t address, uint32_t count, uint8_t *buffer)
455 {
456 int retval;
457 struct arm *armv4_5 = target->arch_info;
458 struct arm7_9_common *arm7_9 = armv4_5->arch_info;
459 enum arm_state core_state = armv4_5->core_state;
460 uint32_t x, flip, shift, save[7];
461 uint32_t i;
462
463 /*
464 * We can't use the dcc flow control bits, so let's transfer data
465 * with 31 bits and flip the MSB each time a new data word is sent.
466 */
467 static uint32_t dcc_code[] =
468 {
469 0xee115e10, /* 3: mrc p14, 0, r5, c1, c0, 0 */
470 0xe3a0301e, /* 1: mov r3, #30 */
471 0xe3a04002, /* mov r4, #2 */
472 0xee111e10, /* 2: mrc p14, 0, r1, c1, c0, 0 */
473 0xe1310005, /* teq r1, r5 */
474 0x0afffffc, /* beq 1b */
475 0xe1a05001, /* mov r5, r1 */
476 0xe1a01081, /* mov r1, r1, lsl #1 */
477 0xee112e10, /* 3: mrc p14, 0, r2, c1, c0, 0 */
478 0xe1320005, /* teq r2, r5 */
479 0x0afffffc, /* beq 3b */
480 0xe1a05002, /* mov r5, r2 */
481 0xe3c22102, /* bic r2, r2, #0x80000000 */
482 0xe1811332, /* orr r1, r1, r2, lsr r3 */
483 0xe2533001, /* subs r3, r3, #1 */
484 0xe4801004, /* str r1, [r0], #4 */
485 0xe1a01412, /* mov r1, r2, lsl r4 */
486 0xe2844001, /* add r4, r4, #1 */
487 0x4affffed, /* bmi 1b */
488 0xeafffff3, /* b 3b */
489 };
490
491 uint32_t dcc_size = sizeof(dcc_code);
492
493 if (!arm7_9->dcc_downloads)
494 return target_write_memory(target, address, 4, count, buffer);
495
496 /* regrab previously allocated working_area, or allocate a new one */
497 if (!arm7_9->dcc_working_area)
498 {
499 uint8_t dcc_code_buf[dcc_size];
500
501 /* make sure we have a working area */
502 if (target_alloc_working_area(target, dcc_size, &arm7_9->dcc_working_area) != ERROR_OK)
503 {
504 LOG_INFO("no working area available, falling back to memory writes");
505 return target_write_memory(target, address, 4, count, buffer);
506 }
507
508 /* copy target instructions to target endianness */
509 for (i = 0; i < dcc_size/4; i++)
510 target_buffer_set_u32(target, dcc_code_buf + i*4, dcc_code[i]);
511
512 /* write DCC code to working area */
513 if ((retval = target_write_memory(target, arm7_9->dcc_working_area->address, 4, dcc_size/4, dcc_code_buf)) != ERROR_OK)
514 {
515 return retval;
516 }
517 }
518
519 /* backup clobbered processor state */
520 for (i = 0; i <= 5; i++)
521 save[i] = buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32);
522 save[i] = buf_get_u32(armv4_5->pc->value, 0, 32);
523
524 /* set up target address in r0 */
525 buf_set_u32(armv4_5->core_cache->reg_list[0].value, 0, 32, address);
526 armv4_5->core_cache->reg_list[0].valid = 1;
527 armv4_5->core_cache->reg_list[0].dirty = 1;
528 armv4_5->core_state = ARM_STATE_ARM;
529
530 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_COMMS_DATA], 0);
531 arm7_9_resume(target, 0, arm7_9->dcc_working_area->address, 1, 1);
532
533 /* send data over */
534 x = 0;
535 flip = 0;
536 shift = 1;
537 for (i = 0; i < count; i++)
538 {
539 uint32_t y = target_buffer_get_u32(target, buffer);
540 uint32_t z = (x >> 1) | (y >> shift) | (flip ^= 0x80000000);
541 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_COMMS_DATA], z);
542 x = y << (32 - shift);
543 if (++shift >= 32 || i + 1 >= count)
544 {
545 z = (x >> 1) | (flip ^= 0x80000000);
546 embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_COMMS_DATA], z);
547 x = 0;
548 shift = 1;
549 }
550 buffer += 4;
551 }
552
553 retval = target_halt(target);
554 if (retval == ERROR_OK)
555 retval = target_wait_state(target, TARGET_HALTED, 500);
556 if (retval == ERROR_OK) {
557 uint32_t endaddress =
558 buf_get_u32(armv4_5->core_cache->reg_list[0].value, 0, 32);
559 if (endaddress != address + count*4) {
560 LOG_ERROR("DCC write failed,"
561 " expected end address 0x%08" PRIx32
562 " got 0x%0" PRIx32 "",
563 address + count*4, endaddress);
564 retval = ERROR_FAIL;
565 }
566 }
567
568 /* restore target state */
569 for (i = 0; i <= 5; i++)
570 {
571 buf_set_u32(armv4_5->core_cache->reg_list[i].value, 0, 32, save[i]);
572 armv4_5->core_cache->reg_list[i].valid = 1;
573 armv4_5->core_cache->reg_list[i].dirty = 1;
574 }
575 buf_set_u32(armv4_5->pc->value, 0, 32, save[i]);
576 armv4_5->pc->valid = 1;
577 armv4_5->pc->dirty = 1;
578 armv4_5->core_state = core_state;
579
580 return retval;
581 }
582
583 int feroceon_init_target(struct command_context *cmd_ctx, struct target *target)
584 {
585 arm9tdmi_init_target(cmd_ctx, target);
586 return ERROR_OK;
587 }
588
589 void feroceon_common_setup(struct target *target)
590 {
591 struct arm *armv4_5 = target->arch_info;
592 struct arm7_9_common *arm7_9 = armv4_5->arch_info;
593
594 /* override some insn sequence functions */
595 arm7_9->change_to_arm = feroceon_change_to_arm;
596 arm7_9->read_core_regs = feroceon_read_core_regs;
597 arm7_9->read_core_regs_target_buffer = feroceon_read_core_regs_target_buffer;
598 arm7_9->read_xpsr = feroceon_read_xpsr;
599 arm7_9->write_xpsr = feroceon_write_xpsr;
600 arm7_9->write_xpsr_im8 = feroceon_write_xpsr_im8;
601 arm7_9->write_core_regs = feroceon_write_core_regs;
602 arm7_9->branch_resume = feroceon_branch_resume;
603 arm7_9->branch_resume_thumb = feroceon_branch_resume_thumb;
604
605 /* must be implemented with only one comparator */
606 arm7_9->enable_single_step = feroceon_enable_single_step;
607 arm7_9->disable_single_step = feroceon_disable_single_step;
608
609 /* MOE is not implemented */
610 arm7_9->examine_debug_reason = feroceon_examine_debug_reason;
611
612 /* Note: asserting DBGRQ might not win over the undef exception.
613 If that happens then just use "arm7_9 dbgrq disable". */
614 arm7_9->use_dbgrq = 1;
615 arm7_9->set_special_dbgrq = feroceon_set_dbgrq;
616
617 /* only one working comparator */
618 arm7_9->wp_available_max = 1;
619 arm7_9->wp1_used_default = -1;
620 }
621
622 int feroceon_target_create(struct target *target, Jim_Interp *interp)
623 {
624 struct arm926ejs_common *arm926ejs = calloc(1,sizeof(struct arm926ejs_common));
625
626 arm926ejs_init_arch_info(target, arm926ejs, target->tap);
627 feroceon_common_setup(target);
628
629 /* the standard ARM926 methods don't always work (don't ask...) */
630 arm926ejs->read_cp15 = feroceon_read_cp15;
631 arm926ejs->write_cp15 = feroceon_write_cp15;
632
633 return ERROR_OK;
634 }
635
636 int dragonite_target_create(struct target *target, Jim_Interp *interp)
637 {
638 struct arm966e_common *arm966e = calloc(1,sizeof(struct arm966e_common));
639
640 arm966e_init_arch_info(target, arm966e, target->tap);
641 feroceon_common_setup(target);
642
643 return ERROR_OK;
644 }
645
646 int feroceon_examine(struct target *target)
647 {
648 struct arm *armv4_5;
649 struct arm7_9_common *arm7_9;
650 int retval;
651
652 retval = arm7_9_examine(target);
653 if (retval != ERROR_OK)
654 return retval;
655
656 armv4_5 = target->arch_info;
657 arm7_9 = armv4_5->arch_info;
658
659 /* the COMMS_CTRL bits are all contiguous */
660 if (buf_get_u32(arm7_9->eice_cache->reg_list[EICE_COMMS_CTRL].value, 2, 4) != 6)
661 LOG_ERROR("unexpected Feroceon EICE version signature");
662
663 arm7_9->eice_cache->reg_list[EICE_DBG_CTRL].size = 6;
664 arm7_9->eice_cache->reg_list[EICE_DBG_STAT].size = 5;
665 arm7_9->has_monitor_mode = 1;
666
667 /* vector catch reg is not initialized on reset */
668 embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_VEC_CATCH], 0);
669
670 /* clear monitor mode, enable comparators */
671 embeddedice_read_reg(&arm7_9->eice_cache->reg_list[EICE_DBG_CTRL]);
672 jtag_execute_queue();
673 buf_set_u32(arm7_9->eice_cache->reg_list[EICE_DBG_CTRL].value, 4, 1, 0);
674 buf_set_u32(arm7_9->eice_cache->reg_list[EICE_DBG_CTRL].value, 5, 1, 0);
675 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_DBG_CTRL]);
676
677 return ERROR_OK;
678 }
679
680 struct target_type feroceon_target =
681 {
682 .name = "feroceon",
683
684 .poll = arm7_9_poll,
685 .arch_state = arm926ejs_arch_state,
686
687 .target_request_data = arm7_9_target_request_data,
688
689 .halt = arm7_9_halt,
690 .resume = arm7_9_resume,
691 .step = arm7_9_step,
692
693 .assert_reset = feroceon_assert_reset,
694 .deassert_reset = arm7_9_deassert_reset,
695 .soft_reset_halt = arm926ejs_soft_reset_halt,
696
697 .get_gdb_reg_list = arm_get_gdb_reg_list,
698
699 .read_memory = arm7_9_read_memory,
700 .write_memory = arm926ejs_write_memory,
701 .bulk_write_memory = feroceon_bulk_write_memory,
702
703 .checksum_memory = arm_checksum_memory,
704 .blank_check_memory = arm_blank_check_memory,
705
706 .run_algorithm = armv4_5_run_algorithm,
707
708 .add_breakpoint = arm7_9_add_breakpoint,
709 .remove_breakpoint = arm7_9_remove_breakpoint,
710 .add_watchpoint = arm7_9_add_watchpoint,
711 .remove_watchpoint = arm7_9_remove_watchpoint,
712
713 .commands = arm926ejs_command_handlers,
714 .target_create = feroceon_target_create,
715 .init_target = feroceon_init_target,
716 .examine = feroceon_examine,
717 };
718
719 struct target_type dragonite_target =
720 {
721 .name = "dragonite",
722
723 .poll = arm7_9_poll,
724 .arch_state = arm_arch_state,
725
726 .target_request_data = arm7_9_target_request_data,
727
728 .halt = arm7_9_halt,
729 .resume = arm7_9_resume,
730 .step = arm7_9_step,
731
732 .assert_reset = feroceon_assert_reset,
733 .deassert_reset = arm7_9_deassert_reset,
734 .soft_reset_halt = arm7_9_soft_reset_halt,
735
736 .get_gdb_reg_list = arm_get_gdb_reg_list,
737
738 .read_memory = arm7_9_read_memory,
739 .write_memory = arm7_9_write_memory,
740 .bulk_write_memory = feroceon_bulk_write_memory,
741
742 .checksum_memory = arm_checksum_memory,
743 .blank_check_memory = arm_blank_check_memory,
744
745 .run_algorithm = armv4_5_run_algorithm,
746
747 .add_breakpoint = arm7_9_add_breakpoint,
748 .remove_breakpoint = arm7_9_remove_breakpoint,
749 .add_watchpoint = arm7_9_add_watchpoint,
750 .remove_watchpoint = arm7_9_remove_watchpoint,
751
752 .commands = arm966e_command_handlers,
753 .target_create = dragonite_target_create,
754 .init_target = feroceon_init_target,
755 .examine = feroceon_examine,
756 };
757
Some of Dave's pending patches