1 /* $FreeBSD: releng/5.0/sys/powerpc/powerpc/db_interface.c 104435 2002-10-04 01:19:18Z grehan $ */
2 /* $NetBSD: db_interface.c,v 1.20 2002/05/13 20:30:09 matt Exp $ */
3 /* $OpenBSD: db_interface.c,v 1.2 1996/12/28 06:21:50 rahnds Exp $ */
4
5 #define USERACC
6
7 #include "opt_ddb.h"
8
9 #include <sys/param.h>
10 #include <sys/proc.h>
11 #include <sys/systm.h>
12 #include <sys/cons.h>
13
14 #include <machine/db_machdep.h>
15 #include <machine/frame.h>
16 #include <machine/trap.h>
17 #ifdef PPC_IBM4XX
18 #include <machine/tlb.h>
19 #include <powerpc/spr.h>
20 #include <uvm/uvm_extern.h>
21 #endif
22
23 #ifdef DDB
24 #include <ddb/ddb.h>
25 #include <ddb/db_sym.h>
26 #include <ddb/db_command.h>
27 #include <ddb/db_access.h>
28 #include <ddb/db_output.h>
29 #endif
30
31 #ifdef KGDB
32 #include <sys/kgdb.h>
33 #endif
34
35 #include <dev/ofw/openfirm.h>
36
37 int db_active = 0;
38
39 db_regs_t ddb_regs;
40
41 void ddb_trap(void); /* Call into trap_subr.S */
42 int ddb_trap_glue(struct trapframe *); /* Called from trap_subr.S */
43 #ifdef PPC_IBM4XX
44 static void db_ppc4xx_ctx(db_expr_t, int, db_expr_t, char *);
45 static void db_ppc4xx_pv(db_expr_t, int, db_expr_t, char *);
46 static void db_ppc4xx_reset(db_expr_t, int, db_expr_t, char *);
47 static void db_ppc4xx_tf(db_expr_t, int, db_expr_t, char *);
48 static void db_ppc4xx_dumptlb(db_expr_t, int, db_expr_t, char *);
49 #ifdef USERACC
50 static void db_ppc4xx_useracc(db_expr_t, int, db_expr_t, char *);
51 #endif
52 #endif /* PPC_IBM4XX */
53
54 #ifdef DDB
55 void
56 Debugger(const char *msg)
57 {
58 db_printf("Welcome to Debugger, %s\n", msg);
59 ddb_trap();
60 }
61 #endif
62
63 int
64 ddb_trap_glue(frame)
65 struct trapframe *frame;
66 {
67 if (!(frame->srr1 & PSL_PR)
68 && (frame->exc == EXC_TRC || frame->exc == EXC_RUNMODETRC
69 || (frame->exc == EXC_PGM
70 && (frame->srr1 & 0x20000))
71 || frame->exc == EXC_BPT)) {
72 int type = frame->exc;
73 if (type == EXC_PGM && (frame->srr1 & 0x20000)) {
74 type = T_BREAKPOINT;
75 }
76 return kdb_trap(type, frame);
77 }
78 return 0;
79 }
80
81 int
82 kdb_trap(type, v)
83 int type;
84 void *v;
85 {
86 struct trapframe *frame = v;
87
88 #if 0
89 switch (type) {
90 case T_BREAKPOINT:
91 case -1:
92 break;
93 default:
94 if (!db_onpanic && db_recover == 0)
95 return 0;
96 if (db_recover != 0) {
97 db_error("Faulted in DDB; continuing...\n");
98 /*NOTREACHED*/
99 }
100 }
101 #endif
102
103 /* XXX Should switch to kdb's own stack here. */
104
105 memcpy(DDB_REGS->r, frame->fixreg, 32 * sizeof(u_int32_t));
106 DDB_REGS->iar = frame->srr0;
107 DDB_REGS->msr = frame->srr1;
108 DDB_REGS->lr = frame->lr;
109 DDB_REGS->ctr = frame->ctr;
110 DDB_REGS->cr = frame->cr;
111 DDB_REGS->xer = frame->xer;
112 #ifdef PPC_IBM4XX
113 DDB_REGS->dear = frame->dear;
114 DDB_REGS->esr = frame->esr;
115 DDB_REGS->pid = frame->pid;
116 #endif
117
118 #ifdef DDB
119 db_active++;
120 cndbctl(1);
121 db_trap(type, 0);
122 cndbctl(0);
123 db_active--;
124 #elif defined(KGDB)
125 if (!kgdb_trap(type, DDB_REGS))
126 return 0;
127 #endif
128
129 /* KGDB isn't smart about advancing PC if we
130 * take a breakpoint trap after kgdb_active is set.
131 * Therefore, we help out here.
132 */
133 if (IS_BREAKPOINT_TRAP(type, 0)) {
134 int bkpt;
135 db_read_bytes(PC_REGS(DDB_REGS),BKPT_SIZE,(void *)&bkpt);
136 if (bkpt== BKPT_INST) {
137 PC_REGS(DDB_REGS) += BKPT_SIZE;
138 }
139 }
140
141 memcpy(frame->fixreg, DDB_REGS->r, 32 * sizeof(u_int32_t));
142 frame->srr0 = DDB_REGS->iar;
143 frame->srr1 = DDB_REGS->msr;
144 frame->lr = DDB_REGS->lr;
145 frame->ctr = DDB_REGS->ctr;
146 frame->cr = DDB_REGS->cr;
147 frame->xer = DDB_REGS->xer;
148 #ifdef PPC_IBM4XX
149 frame->dear = DDB_REGS->dear;
150 frame->esr = DDB_REGS->esr;
151 frame->pid = DDB_REGS->pid;
152 #endif
153
154 return 1;
155 }
156
157 #ifdef PPC_IBM4XX
158 const struct db_command db_machine_command_table[] = {
159 { "ctx", db_ppc4xx_ctx, 0, 0 },
160 { "pv", db_ppc4xx_pv, 0, 0 },
161 { "reset", db_ppc4xx_reset, 0, 0 },
162 { "tf", db_ppc4xx_tf, 0, 0 },
163 { "tlb", db_ppc4xx_dumptlb, 0, 0 },
164 #ifdef USERACC
165 { "user", db_ppc4xx_useracc, 0, 0 },
166 #endif
167 { NULL, }
168 };
169
170 static void
171 db_ppc4xx_ctx(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
172 {
173 struct proc *p;
174
175 /* XXX LOCKING XXX */
176 for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
177 if (p->p_stat) {
178 db_printf("process %p:", p);
179 db_printf("pid:%d pmap:%p ctx:%d %s\n",
180 p->p_pid, p->p_vmspace->vm_map.pmap,
181 p->p_vmspace->vm_map.pmap->pm_ctx,
182 p->p_comm);
183 }
184 }
185 return;
186 }
187
188 static void
189 db_ppc4xx_pv(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
190 {
191 struct pv_entry {
192 struct pv_entry *pv_next; /* Linked list of mappings */
193 vaddr_t pv_va; /* virtual address of mapping */
194 struct pmap *pv_pm;
195 };
196 struct pv_entry *pa_to_pv(paddr_t);
197 struct pv_entry *pv;
198
199 if (!have_addr) {
200 db_printf("pv: <pa>\n");
201 return;
202 }
203 pv = pa_to_pv(addr);
204 db_printf("pv at %p\n", pv);
205 while (pv && pv->pv_pm) {
206 db_printf("next %p va %p pmap %p\n", pv->pv_next,
207 (void *)pv->pv_va, pv->pv_pm);
208 pv = pv->pv_next;
209 }
210 }
211
212 static void
213 db_ppc4xx_reset(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
214 {
215 printf("Reseting...\n");
216 ppc4xx_reset();
217 }
218
219 static void
220 db_ppc4xx_tf(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
221 {
222 struct trapframe *f;
223
224
225 if (have_addr) {
226 f = (struct trapframe *)addr;
227
228 db_printf("r0-r3: \t%8.8x %8.8x %8.8x %8.8x\n",
229 f->fixreg[0], f->fixreg[1],
230 f->fixreg[2], f->fixreg[3]);
231 db_printf("r4-r7: \t%8.8x %8.8x %8.8x %8.8x\n",
232 f->fixreg[4], f->fixreg[5],
233 f->fixreg[6], f->fixreg[7]);
234 db_printf("r8-r11: \t%8.8x %8.8x %8.8x %8.8x\n",
235 f->fixreg[8], f->fixreg[9],
236 f->fixreg[10], f->fixreg[11]);
237 db_printf("r12-r15:\t%8.8x %8.8x %8.8x %8.8x\n",
238 f->fixreg[12], f->fixreg[13],
239 f->fixreg[14], f->fixreg[15]);
240 db_printf("r16-r19:\t%8.8x %8.8x %8.8x %8.8x\n",
241 f->fixreg[16], f->fixreg[17],
242 f->fixreg[18], f->fixreg[19]);
243 db_printf("r20-r23:\t%8.8x %8.8x %8.8x %8.8x\n",
244 f->fixreg[20], f->fixreg[21],
245 f->fixreg[22], f->fixreg[23]);
246 db_printf("r24-r27:\t%8.8x %8.8x %8.8x %8.8x\n",
247 f->fixreg[24], f->fixreg[25],
248 f->fixreg[26], f->fixreg[27]);
249 db_printf("r28-r31:\t%8.8x %8.8x %8.8x %8.8x\n",
250 f->fixreg[28], f->fixreg[29],
251 f->fixreg[30], f->fixreg[31]);
252
253 db_printf("lr: %8.8x cr: %8.8x xer: %8.8x ctr: %8.8x\n",
254 f->lr, f->cr, f->xer, f->ctr);
255 db_printf("srr0(pc): %8.8x srr1(msr): %8.8x "
256 "dear: %8.8x esr: %8.8x\n",
257 f->srr0, f->srr1, f->dear, f->esr);
258 db_printf("exc: %8.8x pid: %8.8x\n",
259 f->exc, f->pid);
260 }
261 return;
262 }
263
264 static const char *const tlbsizes[] = {
265 "1kB",
266 "4kB",
267 "16kB",
268 "64kB",
269 "256kB",
270 "1MB",
271 "4MB",
272 "16MB"
273 };
274
275 static void
276 db_ppc4xx_dumptlb(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
277 {
278 int i, zone, tlbsize;
279 u_int zpr, pid, opid, msr;
280 u_long tlblo, tlbhi, tlbmask;
281
282 zpr = mfspr(SPR_ZPR);
283 for (i = 0; i < NTLB; i++) {
284 asm volatile("mfmsr %3;"
285 "mfpid %4;"
286 "li %0,0;"
287 "mtmsr %0;"
288 "sync; isync;"
289 "tlbre %0,%5,1;"
290 "tlbre %1,%5,0;"
291 "mfpid %2;"
292 "mtpid %4;"
293 "mtmsr %3;"
294 "sync; isync"
295 : "=&r" (tlblo), "=&r" (tlbhi), "=r" (pid),
296 "=&r" (msr), "=&r" (opid) : "r" (i));
297
298 if (strchr(modif, 'v') && !(tlbhi & TLB_VALID))
299 continue;
300
301 tlbsize = (tlbhi & TLB_SIZE_MASK) >> TLB_SIZE_SHFT;
302 /* map tlbsize 0 .. 7 to masks for 1kB .. 16MB */
303 tlbmask = ~(1 << (tlbsize * 2 + 10)) + 1;
304
305 if (have_addr && ((tlbhi & tlbmask) != (addr & tlbmask)))
306 continue;
307
308 zone = (tlblo & TLB_ZSEL_MASK) >> TLB_ZSEL_SHFT;
309 db_printf("tlb%c%2d", tlbhi & TLB_VALID ? ' ' : '*', i);
310 db_printf(" PID %3d EPN 0x%08lx %-5s",
311 pid,
312 tlbhi & tlbmask,
313 tlbsizes[tlbsize]);
314 db_printf(" RPN 0x%08lx ZONE %2d%c %s %s %c%c%c%c%c %s",
315 tlblo & tlbmask,
316 zone,
317 "NTTA"[(zpr >> ((15 - zone) * 2)) & 3],
318 tlblo & TLB_EX ? "EX" : " ",
319 tlblo & TLB_WR ? "WR" : " ",
320 tlblo & TLB_W ? 'W' : ' ',
321 tlblo & TLB_I ? 'I' : ' ',
322 tlblo & TLB_M ? 'M' : ' ',
323 tlblo & TLB_G ? 'G' : ' ',
324 tlbhi & TLB_ENDIAN ? 'E' : ' ',
325 tlbhi & TLB_U0 ? "U0" : " ");
326 db_printf("\n");
327 }
328 }
329
330 #ifdef USERACC
331 static void
332 db_ppc4xx_useracc(db_expr_t addr, int have_addr, db_expr_t count, char *modif)
333 {
334 static paddr_t oldaddr = -1;
335 int instr = 0;
336 int data;
337 extern vaddr_t opc_disasm(vaddr_t loc, int);
338
339
340 if (!have_addr) {
341 addr = oldaddr;
342 }
343 if (addr == -1) {
344 db_printf("no address\n");
345 return;
346 }
347 addr &= ~0x3; /* align */
348 {
349 register char c, *cp = modif;
350 while ((c = *cp++) != 0)
351 if (c == 'i')
352 instr = 1;
353 }
354 while (count--) {
355 if (db_print_position() == 0) {
356 /* Always print the address. */
357 db_printf("%8.4lx:\t", addr);
358 }
359 oldaddr=addr;
360 copyin((void *)addr, &data, sizeof(data));
361 if (instr) {
362 opc_disasm(addr, data);
363 } else {
364 db_printf("%4.4x\n", data);
365 }
366 addr += 4;
367 db_end_line();
368 }
369
370 }
371 #endif
372
373 #endif /* PPC_IBM4XX */
374
375 void
376 db_show_mdpcpu(struct pcpu *pc)
377 {
378 }
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