Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 | /*--------------------------------------------------------------------------
--
-- Identity : Linux50 Debug Funcions
--
-- File : arch/sh64/lib/dbg.C
--
-- Copyright 2000, 2001 STMicroelectronics Limited.
-- Copyright 2004 Richard Curnow (evt_debug etc)
--
--------------------------------------------------------------------------*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <asm/mmu_context.h>
typedef u64 regType_t;
static regType_t getConfigReg(u64 id)
{
register u64 reg __asm__("r2");
asm volatile ("getcfg %1, 0, %0":"=r" (reg):"r"(id));
return (reg);
}
/* ======================================================================= */
static char *szTab[] = { "4k", "64k", "1M", "512M" };
static char *protTab[] = { "----",
"---R",
"--X-",
"--XR",
"-W--",
"-W-R",
"-WX-",
"-WXR",
"U---",
"U--R",
"U-X-",
"U-XR",
"UW--",
"UW-R",
"UWX-",
"UWXR"
};
#define ITLB_BASE 0x00000000
#define DTLB_BASE 0x00800000
#define MAX_TLBs 64
/* PTE High */
#define GET_VALID(pte) ((pte) & 0x1)
#define GET_SHARED(pte) ((pte) & 0x2)
#define GET_ASID(pte) ((pte >> 2) & 0x0ff)
#define GET_EPN(pte) ((pte) & 0xfffff000)
/* PTE Low */
#define GET_CBEHAVIOR(pte) ((pte) & 0x3)
#define GET_PAGE_SIZE(pte) szTab[((pte >> 3) & 0x3)]
#define GET_PROTECTION(pte) protTab[((pte >> 6) & 0xf)]
#define GET_PPN(pte) ((pte) & 0xfffff000)
#define PAGE_1K_MASK 0x00000000
#define PAGE_4K_MASK 0x00000010
#define PAGE_64K_MASK 0x00000080
#define MMU_PAGESIZE_MASK (PAGE_64K_MASK | PAGE_4K_MASK)
#define PAGE_1MB_MASK MMU_PAGESIZE_MASK
#define PAGE_1K (1024)
#define PAGE_4K (1024 * 4)
#define PAGE_64K (1024 * 64)
#define PAGE_1MB (1024 * 1024)
#define HOW_TO_READ_TLB_CONTENT \
"[ ID] PPN EPN ASID Share CB P.Size PROT.\n"
void print_single_tlb(unsigned long tlb, int single_print)
{
regType_t pteH;
regType_t pteL;
unsigned int valid, shared, asid, epn, cb, ppn;
char *pSize;
char *pProt;
/*
** in case of single print <single_print> is true, this implies:
** 1) print the TLB in any case also if NOT VALID
** 2) print out the header
*/
pteH = getConfigReg(tlb);
valid = GET_VALID(pteH);
if (single_print)
printk(HOW_TO_READ_TLB_CONTENT);
else if (!valid)
return;
pteL = getConfigReg(tlb + 1);
shared = GET_SHARED(pteH);
asid = GET_ASID(pteH);
epn = GET_EPN(pteH);
cb = GET_CBEHAVIOR(pteL);
pSize = GET_PAGE_SIZE(pteL);
pProt = GET_PROTECTION(pteL);
ppn = GET_PPN(pteL);
printk("[%c%2ld] 0x%08x 0x%08x %03d %02x %02x %4s %s\n",
((valid) ? ' ' : 'u'), ((tlb & 0x0ffff) / TLB_STEP),
ppn, epn, asid, shared, cb, pSize, pProt);
}
void print_dtlb(void)
{
int count;
unsigned long tlb;
printk(" ================= SH-5 D-TLBs Status ===================\n");
printk(HOW_TO_READ_TLB_CONTENT);
tlb = DTLB_BASE;
for (count = 0; count < MAX_TLBs; count++, tlb += TLB_STEP)
print_single_tlb(tlb, 0);
printk
(" =============================================================\n");
}
void print_itlb(void)
{
int count;
unsigned long tlb;
printk(" ================= SH-5 I-TLBs Status ===================\n");
printk(HOW_TO_READ_TLB_CONTENT);
tlb = ITLB_BASE;
for (count = 0; count < MAX_TLBs; count++, tlb += TLB_STEP)
print_single_tlb(tlb, 0);
printk
(" =============================================================\n");
}
/* ======================================================================= */
#ifdef CONFIG_POOR_MANS_STRACE
#include "syscalltab.h"
struct ring_node {
int evt;
int ret_addr;
int event;
int tra;
int pid;
unsigned long sp;
unsigned long pc;
};
static struct ring_node event_ring[16];
static int event_ptr = 0;
struct stored_syscall_data {
int pid;
int syscall_number;
};
#define N_STORED_SYSCALLS 16
static struct stored_syscall_data stored_syscalls[N_STORED_SYSCALLS];
static int syscall_next=0;
static int syscall_next_print=0;
void evt_debug(int evt, int ret_addr, int event, int tra, struct pt_regs *regs)
{
int syscallno = tra & 0xff;
unsigned long sp;
unsigned long stack_bottom;
int pid;
struct ring_node *rr;
pid = current->pid;
stack_bottom = (unsigned long) task_stack_page(current);
asm volatile("ori r15, 0, %0" : "=r" (sp));
rr = event_ring + event_ptr;
rr->evt = evt;
rr->ret_addr = ret_addr;
rr->event = event;
rr->tra = tra;
rr->pid = pid;
rr->sp = sp;
rr->pc = regs->pc;
if (sp < stack_bottom + 3092) {
printk("evt_debug : stack underflow report\n");
int i, j;
for (j=0, i = event_ptr; j<16; j++) {
rr = event_ring + i;
printk("evt=%08x event=%08x tra=%08x pid=%5d sp=%08lx pc=%08lx\n",
rr->evt, rr->event, rr->tra, rr->pid, rr->sp, rr->pc);
i--;
i &= 15;
}
panic("STACK UNDERFLOW\n");
}
event_ptr = (event_ptr + 1) & 15;
if ((event == 2) && (evt == 0x160)) {
if (syscallno < NUM_SYSCALL_INFO_ENTRIES) {
/* Store the syscall information to print later. We
* can't print this now - currently we're running with
* SR.BL=1, so we can't take a tlbmiss (which could occur
* in the console drivers under printk).
*
* Just overwrite old entries on ring overflow - this
* is only for last-hope debugging. */
stored_syscalls[syscall_next].pid = current->pid;
stored_syscalls[syscall_next].syscall_number = syscallno;
syscall_next++;
syscall_next &= (N_STORED_SYSCALLS - 1);
}
}
}
static void drain_syscalls(void) {
while (syscall_next_print != syscall_next) {
printk("Task %d: %s()\n",
stored_syscalls[syscall_next_print].pid,
syscall_info_table[stored_syscalls[syscall_next_print].syscall_number].name);
syscall_next_print++;
syscall_next_print &= (N_STORED_SYSCALLS - 1);
}
}
void evt_debug2(unsigned int ret)
{
drain_syscalls();
printk("Task %d: syscall returns %08x\n", current->pid, ret);
}
void evt_debug_ret_from_irq(struct pt_regs *regs)
{
int pid;
struct ring_node *rr;
pid = current->pid;
rr = event_ring + event_ptr;
rr->evt = 0xffff;
rr->ret_addr = 0;
rr->event = 0;
rr->tra = 0;
rr->pid = pid;
rr->pc = regs->pc;
event_ptr = (event_ptr + 1) & 15;
}
void evt_debug_ret_from_exc(struct pt_regs *regs)
{
int pid;
struct ring_node *rr;
pid = current->pid;
rr = event_ring + event_ptr;
rr->evt = 0xfffe;
rr->ret_addr = 0;
rr->event = 0;
rr->tra = 0;
rr->pid = pid;
rr->pc = regs->pc;
event_ptr = (event_ptr + 1) & 15;
}
#endif /* CONFIG_POOR_MANS_STRACE */
/* ======================================================================= */
void show_excp_regs(char *from, int trapnr, int signr, struct pt_regs *regs)
{
unsigned long long ah, al, bh, bl, ch, cl;
printk("\n");
printk("EXCEPTION - %s: task %d; Linux trap # %d; signal = %d\n",
((from) ? from : "???"), current->pid, trapnr, signr);
asm volatile ("getcon " __EXPEVT ", %0":"=r"(ah));
asm volatile ("getcon " __EXPEVT ", %0":"=r"(al));
ah = (ah) >> 32;
al = (al) & 0xffffffff;
asm volatile ("getcon " __KCR1 ", %0":"=r"(bh));
asm volatile ("getcon " __KCR1 ", %0":"=r"(bl));
bh = (bh) >> 32;
bl = (bl) & 0xffffffff;
asm volatile ("getcon " __INTEVT ", %0":"=r"(ch));
asm volatile ("getcon " __INTEVT ", %0":"=r"(cl));
ch = (ch) >> 32;
cl = (cl) & 0xffffffff;
printk("EXPE: %08Lx%08Lx KCR1: %08Lx%08Lx INTE: %08Lx%08Lx\n",
ah, al, bh, bl, ch, cl);
asm volatile ("getcon " __PEXPEVT ", %0":"=r"(ah));
asm volatile ("getcon " __PEXPEVT ", %0":"=r"(al));
ah = (ah) >> 32;
al = (al) & 0xffffffff;
asm volatile ("getcon " __PSPC ", %0":"=r"(bh));
asm volatile ("getcon " __PSPC ", %0":"=r"(bl));
bh = (bh) >> 32;
bl = (bl) & 0xffffffff;
asm volatile ("getcon " __PSSR ", %0":"=r"(ch));
asm volatile ("getcon " __PSSR ", %0":"=r"(cl));
ch = (ch) >> 32;
cl = (cl) & 0xffffffff;
printk("PEXP: %08Lx%08Lx PSPC: %08Lx%08Lx PSSR: %08Lx%08Lx\n",
ah, al, bh, bl, ch, cl);
ah = (regs->pc) >> 32;
al = (regs->pc) & 0xffffffff;
bh = (regs->regs[18]) >> 32;
bl = (regs->regs[18]) & 0xffffffff;
ch = (regs->regs[15]) >> 32;
cl = (regs->regs[15]) & 0xffffffff;
printk("PC : %08Lx%08Lx LINK: %08Lx%08Lx SP : %08Lx%08Lx\n",
ah, al, bh, bl, ch, cl);
ah = (regs->sr) >> 32;
al = (regs->sr) & 0xffffffff;
asm volatile ("getcon " __TEA ", %0":"=r"(bh));
asm volatile ("getcon " __TEA ", %0":"=r"(bl));
bh = (bh) >> 32;
bl = (bl) & 0xffffffff;
asm volatile ("getcon " __KCR0 ", %0":"=r"(ch));
asm volatile ("getcon " __KCR0 ", %0":"=r"(cl));
ch = (ch) >> 32;
cl = (cl) & 0xffffffff;
printk("SR : %08Lx%08Lx TEA : %08Lx%08Lx KCR0: %08Lx%08Lx\n",
ah, al, bh, bl, ch, cl);
ah = (regs->regs[0]) >> 32;
al = (regs->regs[0]) & 0xffffffff;
bh = (regs->regs[1]) >> 32;
bl = (regs->regs[1]) & 0xffffffff;
ch = (regs->regs[2]) >> 32;
cl = (regs->regs[2]) & 0xffffffff;
printk("R0 : %08Lx%08Lx R1 : %08Lx%08Lx R2 : %08Lx%08Lx\n",
ah, al, bh, bl, ch, cl);
ah = (regs->regs[3]) >> 32;
al = (regs->regs[3]) & 0xffffffff;
bh = (regs->regs[4]) >> 32;
bl = (regs->regs[4]) & 0xffffffff;
ch = (regs->regs[5]) >> 32;
cl = (regs->regs[5]) & 0xffffffff;
printk("R3 : %08Lx%08Lx R4 : %08Lx%08Lx R5 : %08Lx%08Lx\n",
ah, al, bh, bl, ch, cl);
ah = (regs->regs[6]) >> 32;
al = (regs->regs[6]) & 0xffffffff;
bh = (regs->regs[7]) >> 32;
bl = (regs->regs[7]) & 0xffffffff;
ch = (regs->regs[8]) >> 32;
cl = (regs->regs[8]) & 0xffffffff;
printk("R6 : %08Lx%08Lx R7 : %08Lx%08Lx R8 : %08Lx%08Lx\n",
ah, al, bh, bl, ch, cl);
ah = (regs->regs[9]) >> 32;
al = (regs->regs[9]) & 0xffffffff;
bh = (regs->regs[10]) >> 32;
bl = (regs->regs[10]) & 0xffffffff;
ch = (regs->regs[11]) >> 32;
cl = (regs->regs[11]) & 0xffffffff;
printk("R9 : %08Lx%08Lx R10 : %08Lx%08Lx R11 : %08Lx%08Lx\n",
ah, al, bh, bl, ch, cl);
printk("....\n");
ah = (regs->tregs[0]) >> 32;
al = (regs->tregs[0]) & 0xffffffff;
bh = (regs->tregs[1]) >> 32;
bl = (regs->tregs[1]) & 0xffffffff;
ch = (regs->tregs[2]) >> 32;
cl = (regs->tregs[2]) & 0xffffffff;
printk("T0 : %08Lx%08Lx T1 : %08Lx%08Lx T2 : %08Lx%08Lx\n",
ah, al, bh, bl, ch, cl);
printk("....\n");
print_dtlb();
print_itlb();
}
/* ======================================================================= */
/*
** Depending on <base> scan the MMU, Data or Instruction side
** looking for a valid mapping matching Eaddr & asid.
** Return -1 if not found or the TLB id entry otherwise.
** Note: it works only for 4k pages!
*/
static unsigned long
lookup_mmu_side(unsigned long base, unsigned long Eaddr, unsigned long asid)
{
regType_t pteH;
unsigned long epn;
int count;
epn = Eaddr & 0xfffff000;
for (count = 0; count < MAX_TLBs; count++, base += TLB_STEP) {
pteH = getConfigReg(base);
if (GET_VALID(pteH))
if ((unsigned long) GET_EPN(pteH) == epn)
if ((unsigned long) GET_ASID(pteH) == asid)
break;
}
return ((unsigned long) ((count < MAX_TLBs) ? base : -1));
}
unsigned long lookup_dtlb(unsigned long Eaddr)
{
unsigned long asid = get_asid();
return (lookup_mmu_side((u64) DTLB_BASE, Eaddr, asid));
}
unsigned long lookup_itlb(unsigned long Eaddr)
{
unsigned long asid = get_asid();
return (lookup_mmu_side((u64) ITLB_BASE, Eaddr, asid));
}
void print_page(struct page *page)
{
printk(" page[%p] -> index 0x%lx, count 0x%x, flags 0x%lx\n",
page, page->index, page_count(page), page->flags);
printk(" address_space = %p, pages =%ld\n", page->mapping,
page->mapping->nrpages);
}
|