traps.c revision 25985edcedea6396277003854657b5f3cb31a628
11394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu/* 22a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz * Main exception handling logic. 32a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz * 42a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz * Copyright 2004-2010 Analog Devices Inc. 51394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu * 696f1050d3df105c9ae6c6ac224f370199ea82fcdRobin Getz * Licensed under the GPL-2 or later 71394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu */ 81394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 970f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger#include <linux/bug.h> 101f83b8f148a1eb967d2a628cbb741cd56fb54572Mike Frysinger#include <linux/uaccess.h> 111f83b8f148a1eb967d2a628cbb741cd56fb54572Mike Frysinger#include <linux/module.h> 121394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu#include <asm/traps.h> 13f4585a08479a730fb809606b8ee327a5398c117cMike Frysinger#include <asm/cplb.h> 141394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu#include <asm/blackfin.h> 151394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu#include <asm/irq_handler.h> 16d8f66c8c1ea8e948483ee4739ad91120f5f7de51Robin Getz#include <linux/irq.h> 17669b792c77bbc30e9f4d9c95dbc918dc348c49c2Robin Getz#include <asm/trace.h> 18226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz#include <asm/fixed_code.h> 196ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz#include <asm/pseudo_instructions.h> 201394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 211394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu#ifdef CONFIG_KGDB 221394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu# include <linux/kgdb.h> 23226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz 24226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz# define CHK_DEBUGGER_TRAP() \ 25226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz do { \ 26a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang kgdb_handle_exception(trapnr, sig, info.si_code, fp); \ 27226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz } while (0) 28226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz# define CHK_DEBUGGER_TRAP_MAYBE() \ 29226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz do { \ 30226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz if (kgdb_connected) \ 31226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz CHK_DEBUGGER_TRAP(); \ 32226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz } while (0) 33226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz#else 34226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz# define CHK_DEBUGGER_TRAP() do { } while (0) 35226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz# define CHK_DEBUGGER_TRAP_MAYBE() do { } while (0) 361394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu#endif 371394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 389f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz 394ee1c45337e7b529eed644c6f62399d797dcbc10Robin Getz#ifdef CONFIG_DEBUG_VERBOSE 409f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz#define verbose_printk(fmt, arg...) \ 419f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz printk(fmt, ##arg) 429f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz#else 439f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz#define verbose_printk(fmt, arg...) \ 449f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz ({ if (0) printk(fmt, ##arg); 0; }) 459f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz#endif 469f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz 4781f7f45606812f1d15d618c2646d0f33ca111f87Robin Getz#if defined(CONFIG_DEBUG_MMRS) || defined(CONFIG_DEBUG_MMRS_MODULE) 4881f7f45606812f1d15d618c2646d0f33ca111f87Robin Getzu32 last_seqstat; 4981f7f45606812f1d15d618c2646d0f33ca111f87Robin Getz#ifdef CONFIG_DEBUG_MMRS_MODULE 5081f7f45606812f1d15d618c2646d0f33ca111f87Robin GetzEXPORT_SYMBOL(last_seqstat); 5181f7f45606812f1d15d618c2646d0f33ca111f87Robin Getz#endif 5281f7f45606812f1d15d618c2646d0f33ca111f87Robin Getz#endif 5381f7f45606812f1d15d618c2646d0f33ca111f87Robin Getz 541394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu/* Initiate the event table handler */ 551394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wuvoid __init trap_init(void) 561394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu{ 571394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu CSYNC(); 581394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu bfin_write_EVT3(trap); 591394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu CSYNC(); 601394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu} 611394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 6282bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysingerstatic int kernel_mode_regs(struct pt_regs *regs) 6382bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger{ 6482bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger return regs->ipend & 0xffc0; 6582bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger} 6682bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger 67c4baebf2683d16f24a84a99268ef5f7318905337Yi Liasmlinkage notrace void trap_c(struct pt_regs *fp) 681394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu{ 69518039bc24cbb9ce34665814fe120eac50bedd9aRobin Getz#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON 70518039bc24cbb9ce34665814fe120eac50bedd9aRobin Getz int j; 71518039bc24cbb9ce34665814fe120eac50bedd9aRobin Getz#endif 726ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz#ifdef CONFIG_BFIN_PSEUDODBG_INSNS 736ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz int opcode; 746ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz#endif 75b6dbde27dd95cc0397d9722ad8365fa93a07b0d3Yi Li unsigned int cpu = raw_smp_processor_id(); 7682bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger const char *strerror = NULL; 77518039bc24cbb9ce34665814fe120eac50bedd9aRobin Getz int sig = 0; 781394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu siginfo_t info; 791394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE; 801394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 81226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz trace_buffer_save(j); 8281f7f45606812f1d15d618c2646d0f33ca111f87Robin Getz#if defined(CONFIG_DEBUG_MMRS) || defined(CONFIG_DEBUG_MMRS_MODULE) 8381f7f45606812f1d15d618c2646d0f33ca111f87Robin Getz last_seqstat = (u32)fp->seqstat; 8481f7f45606812f1d15d618c2646d0f33ca111f87Robin Getz#endif 85226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz 86226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz /* Important - be very careful dereferncing pointers - will lead to 87226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz * double faults if the stack has become corrupt 88226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz */ 89226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz 901394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* trap_c() will be called for exceptions. During exceptions 911394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu * processing, the pc value should be set with retx value. 921394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu * With this change we can cleanup some code in signal.c- TODO 931394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu */ 941394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu fp->orig_pc = fp->retx; 951394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* printk("exception: 0x%x, ipend=%x, reti=%x, retx=%x\n", 961394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu trapnr, fp->ipend, fp->pc, fp->retx); */ 971394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 981394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* send the appropriate signal to the user program */ 991394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu switch (trapnr) { 1001394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 10125985edcedea6396277003854657b5f3cb31a628Lucas De Marchi /* This table works in conjunction with the one in ./mach-common/entry.S 1021394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu * Some exceptions are handled there (in assembly, in exception space) 1031394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu * Some are handled here, (in C, in interrupt space) 1041394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu * Some, like CPLB, are handled in both, where the normal path is 1051394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu * handled in assembly/exception space, and the error path is handled 1061394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu * here 1071394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu */ 1081394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 1091394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x00 - Linux Syscall, getting here is an error */ 1101394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x01 - userspace gdb breakpoint, handled here */ 1111394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_EXCPT01: 1121394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = TRAP_ILLTRAP; 1131394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGTRAP; 1141394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu CHK_DEBUGGER_TRAP_MAYBE(); 1151394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* Check if this is a breakpoint in kernel space */ 11682bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger if (kernel_mode_regs(fp)) 1176510a20e1b1a3a5703429a09d03adf44882ae373Mike Frysinger goto traps_done; 1181394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu else 1191394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 1209401e618c8f70920f34893946239e24d40a3519aMike Frysinger /* 0x03 - User Defined, userspace stack overflow */ 1211394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_EXCPT03: 1221394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = SEGV_STACKFLOW; 1231394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGSEGV; 12482bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x03(KERN_NOTICE); 125a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 1261394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 12727707d3e43e3a9c53e75cd7769f3ef74b1d56625Sonic Zhang /* 0x02 - KGDB initial connection and break signal trap */ 12827707d3e43e3a9c53e75cd7769f3ef74b1d56625Sonic Zhang case VEC_EXCPT02: 12927707d3e43e3a9c53e75cd7769f3ef74b1d56625Sonic Zhang#ifdef CONFIG_KGDB 13027707d3e43e3a9c53e75cd7769f3ef74b1d56625Sonic Zhang info.si_code = TRAP_ILLTRAP; 13127707d3e43e3a9c53e75cd7769f3ef74b1d56625Sonic Zhang sig = SIGTRAP; 13227707d3e43e3a9c53e75cd7769f3ef74b1d56625Sonic Zhang CHK_DEBUGGER_TRAP(); 1336510a20e1b1a3a5703429a09d03adf44882ae373Mike Frysinger goto traps_done; 13427707d3e43e3a9c53e75cd7769f3ef74b1d56625Sonic Zhang#endif 1355c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x04 - User Defined */ 1365c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x05 - User Defined */ 1375c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x06 - User Defined */ 1385c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x07 - User Defined */ 1395c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x08 - User Defined */ 1405c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x09 - User Defined */ 1415c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x0A - User Defined */ 1425c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x0B - User Defined */ 1435c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x0C - User Defined */ 1445c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x0D - User Defined */ 1455c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x0E - User Defined */ 1465c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x0F - User Defined */ 14727707d3e43e3a9c53e75cd7769f3ef74b1d56625Sonic Zhang /* If we got here, it is most likely that someone was trying to use a 1485c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz * custom exception handler, and it is not actually installed properly 1495c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz */ 1505c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz case VEC_EXCPT04 ... VEC_EXCPT15: 1515c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz info.si_code = ILL_ILLPARAOP; 1525c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz sig = SIGILL; 15382bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x04(KERN_NOTICE); 1545c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz CHK_DEBUGGER_TRAP_MAYBE(); 1555c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz break; 1561394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x10 HW Single step, handled here */ 1571394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_STEP: 1581394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = TRAP_STEP; 1591394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGTRAP; 1601394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu CHK_DEBUGGER_TRAP_MAYBE(); 1611394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* Check if this is a single step in kernel space */ 16282bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger if (kernel_mode_regs(fp)) 1636510a20e1b1a3a5703429a09d03adf44882ae373Mike Frysinger goto traps_done; 1641394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu else 1651394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 1661394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x11 - Trace Buffer Full, handled here */ 1671394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_OVFLOW: 1681394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = TRAP_TRACEFLOW; 1691394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGTRAP; 17082bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x11(KERN_NOTICE); 171a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 1721394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 1731394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x12 - Reserved, Caught by default */ 1741394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x13 - Reserved, Caught by default */ 1751394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x14 - Reserved, Caught by default */ 1761394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x15 - Reserved, Caught by default */ 1771394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x16 - Reserved, Caught by default */ 1781394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x17 - Reserved, Caught by default */ 1791394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x18 - Reserved, Caught by default */ 1801394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x19 - Reserved, Caught by default */ 1811394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x1A - Reserved, Caught by default */ 1821394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x1B - Reserved, Caught by default */ 1831394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x1C - Reserved, Caught by default */ 1841394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x1D - Reserved, Caught by default */ 1851394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x1E - Reserved, Caught by default */ 1861394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x1F - Reserved, Caught by default */ 1871394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x20 - Reserved, Caught by default */ 1881394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x21 - Undefined Instruction, handled here */ 1891394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_UNDEF_I: 19070f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger#ifdef CONFIG_BUG 19170f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger if (kernel_mode_regs(fp)) { 19270f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger switch (report_bug(fp->pc, fp)) { 19370f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger case BUG_TRAP_TYPE_NONE: 19470f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger break; 19570f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger case BUG_TRAP_TYPE_WARN: 19670f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger dump_bfin_trace_buffer(); 19770f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger fp->pc += 2; 19870f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger goto traps_done; 19970f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger case BUG_TRAP_TYPE_BUG: 20070f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger /* call to panic() will dump trace, and it is 20170f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger * off at this point, so it won't be clobbered 20270f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger */ 20370f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger panic("BUG()"); 20470f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger } 20570f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger } 20670f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger#endif 2076ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz#ifdef CONFIG_BFIN_PSEUDODBG_INSNS 2086ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz /* 2096ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz * Support for the fake instructions, if the instruction fails, 2106ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz * then just execute a illegal opcode failure (like normal). 2116ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz * Don't support these instructions inside the kernel 2126ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz */ 2136ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz if (!kernel_mode_regs(fp) && get_instruction(&opcode, (unsigned short *)fp->pc)) { 2146ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz if (execute_pseudodbg_assert(fp, opcode)) 2156ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz goto traps_done; 216dc89d97fc73176c883b32ff21ae6f1164ca20d05Robin Getz if (execute_pseudodbg(fp, opcode)) 217dc89d97fc73176c883b32ff21ae6f1164ca20d05Robin Getz goto traps_done; 2186ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz } 2196ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz#endif 2201394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = ILL_ILLOPC; 2211394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGILL; 22282bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x21(KERN_NOTICE); 223a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 2241394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 2251394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x22 - Illegal Instruction Combination, handled here */ 2261394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_ILGAL_I: 2271394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = ILL_ILLPARAOP; 2281394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGILL; 22982bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x22(KERN_NOTICE); 230a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 2311394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 232f26fbc48f130962fce15f37d079968f0f272e0c2Robin Getz /* 0x23 - Data CPLB protection violation, handled here */ 2331394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_CPLB_VL: 2341394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = ILL_CPLB_VI; 23536b841288656b9b30b5d2add2fd136ac7eab5867Graf Yang sig = SIGSEGV; 23682bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x23(KERN_NOTICE); 237a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 2381394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 2391394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x24 - Data access misaligned, handled here */ 2401394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_MISALI_D: 2411394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = BUS_ADRALN; 2421394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGBUS; 24382bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x24(KERN_NOTICE); 244a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 2451394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 2461394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x25 - Unrecoverable Event, handled here */ 2471394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_UNCOV: 2481394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = ILL_ILLEXCPT; 2491394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGILL; 25082bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x25(KERN_NOTICE); 251a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 2521394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 2531394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x26 - Data CPLB Miss, normal case is handled in _cplb_hdr, 2541394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu error case is handled here */ 2551394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_CPLB_M: 2561394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = BUS_ADRALN; 2571394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGBUS; 25882bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x26(KERN_NOTICE); 2591394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 2601394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero, handled here */ 2611394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_CPLB_MHIT: 2621394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = ILL_CPLB_MULHIT; 2631394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGSEGV; 264c6c6f75d54ca734c409e336245662934c21fcee0Mike Frysinger#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO 2658f65873e47784a390949f0d61e5692dbf2a8253eGraf Yang if (cpu_pda[cpu].dcplb_fault_addr < FIXED_CODE_START) 26682bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE "NULL pointer access\n"; 267c6c6f75d54ca734c409e336245662934c21fcee0Mike Frysinger else 2681394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu#endif 26982bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x27(KERN_NOTICE); 270a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 2711394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 2721394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x28 - Emulation Watchpoint, handled here */ 2731394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_WATCH: 2741394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = TRAP_WATCHPT; 2751394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGTRAP; 276569a50ca3f56cd69199733580e7ca0e81029473aRobin Getz pr_debug(EXC_0x28(KERN_DEBUG)); 2771394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu CHK_DEBUGGER_TRAP_MAYBE(); 2781394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* Check if this is a watchpoint in kernel space */ 27982bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger if (kernel_mode_regs(fp)) 2806510a20e1b1a3a5703429a09d03adf44882ae373Mike Frysinger goto traps_done; 2811394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu else 2821394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 2831394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu#ifdef CONFIG_BF535 2841394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x29 - Instruction fetch access error (535 only) */ 2851394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_ISTRU_VL: /* ADSP-BF535 only (MH) */ 2861394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = BUS_OPFETCH; 2871394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGBUS; 28882bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE "BF535: VEC_ISTRU_VL\n"; 289a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 2901394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 2911394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu#else 2921394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x29 - Reserved, Caught by default */ 2931394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu#endif 2941394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x2A - Instruction fetch misaligned, handled here */ 2951394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_MISALI_I: 2961394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = BUS_ADRALN; 2971394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGBUS; 29882bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x2A(KERN_NOTICE); 299a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 3001394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 301f26fbc48f130962fce15f37d079968f0f272e0c2Robin Getz /* 0x2B - Instruction CPLB protection violation, handled here */ 3021394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_CPLB_I_VL: 3031394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = ILL_CPLB_VI; 304f26fbc48f130962fce15f37d079968f0f272e0c2Robin Getz sig = SIGBUS; 30582bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x2B(KERN_NOTICE); 306a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 3071394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 3081394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x2C - Instruction CPLB miss, handled in _cplb_hdr */ 3091394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_CPLB_I_M: 3101394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = ILL_CPLB_MISS; 3111394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGBUS; 31282bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x2C(KERN_NOTICE); 3131394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 3141394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x2D - Instruction CPLB Multiple Hits, handled here */ 3151394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_CPLB_I_MHIT: 3161394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = ILL_CPLB_MULHIT; 3171394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGSEGV; 318c6c6f75d54ca734c409e336245662934c21fcee0Mike Frysinger#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO 3198f65873e47784a390949f0d61e5692dbf2a8253eGraf Yang if (cpu_pda[cpu].icplb_fault_addr < FIXED_CODE_START) 32082bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE "Jump to NULL address\n"; 321c6c6f75d54ca734c409e336245662934c21fcee0Mike Frysinger else 3221394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu#endif 32382bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x2D(KERN_NOTICE); 324a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 3251394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 3261394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x2E - Illegal use of Supervisor Resource, handled here */ 3271394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_ILL_RES: 3281394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = ILL_PRVOPC; 3291394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGILL; 33082bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x2E(KERN_NOTICE); 331a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 3321394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 3331394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x2F - Reserved, Caught by default */ 3341394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x30 - Reserved, Caught by default */ 3351394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x31 - Reserved, Caught by default */ 3361394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x32 - Reserved, Caught by default */ 3371394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x33 - Reserved, Caught by default */ 3381394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x34 - Reserved, Caught by default */ 3391394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x35 - Reserved, Caught by default */ 3401394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x36 - Reserved, Caught by default */ 3411394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x37 - Reserved, Caught by default */ 3421394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x38 - Reserved, Caught by default */ 3431394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x39 - Reserved, Caught by default */ 3441394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x3A - Reserved, Caught by default */ 3451394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x3B - Reserved, Caught by default */ 3461394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x3C - Reserved, Caught by default */ 3471394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x3D - Reserved, Caught by default */ 3481394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x3E - Reserved, Caught by default */ 3491394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x3F - Reserved, Caught by default */ 35013fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz case VEC_HWERR: 35113fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz info.si_code = BUS_ADRALN; 35213fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz sig = SIGBUS; 35313fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz switch (fp->seqstat & SEQSTAT_HWERRCAUSE) { 35413fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz /* System MMR Error */ 35513fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz case (SEQSTAT_HWERRCAUSE_SYSTEM_MMR): 35613fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz info.si_code = BUS_ADRALN; 35713fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz sig = SIGBUS; 35882bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE HWC_x2(KERN_NOTICE); 35913fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz break; 36013fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz /* External Memory Addressing Error */ 36113fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz case (SEQSTAT_HWERRCAUSE_EXTERN_ADDR): 362a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song if (ANOMALY_05000310) { 363a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song static unsigned long anomaly_rets; 364a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song 365a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song if ((fp->pc >= (L1_CODE_START + L1_CODE_LENGTH - 512)) && 366a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song (fp->pc < (L1_CODE_START + L1_CODE_LENGTH))) { 367a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song /* 368a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song * A false hardware error will happen while fetching at 369a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song * the L1 instruction SRAM boundary. Ignore it. 370a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song */ 371a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song anomaly_rets = fp->rets; 372a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song goto traps_done; 373a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song } else if (fp->rets == anomaly_rets) { 374a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song /* 375a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song * While boundary code returns to a function, at the ret 376a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song * point, a new false hardware error might occur too based 377a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song * on tests. Ignore it too. 378a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song */ 379a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song goto traps_done; 380a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song } else if ((fp->rets >= (L1_CODE_START + L1_CODE_LENGTH - 512)) && 381a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song (fp->rets < (L1_CODE_START + L1_CODE_LENGTH))) { 382a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song /* 383a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song * If boundary code calls a function, at the entry point, 384a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song * a new false hardware error maybe happen based on tests. 385a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song * Ignore it too. 386a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song */ 387a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song goto traps_done; 388a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song } else 389a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song anomaly_rets = 0; 390a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song } 391a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song 39213fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz info.si_code = BUS_ADRERR; 39313fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz sig = SIGBUS; 39482bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE HWC_x3(KERN_NOTICE); 39513fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz break; 39613fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz /* Performance Monitor Overflow */ 39713fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz case (SEQSTAT_HWERRCAUSE_PERF_FLOW): 39882bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE HWC_x12(KERN_NOTICE); 39913fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz break; 40013fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz /* RAISE 5 instruction */ 40113fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz case (SEQSTAT_HWERRCAUSE_RAISE_5): 40213fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz printk(KERN_NOTICE HWC_x18(KERN_NOTICE)); 40313fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz break; 40413fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz default: /* Reserved */ 40513fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz printk(KERN_NOTICE HWC_default(KERN_NOTICE)); 40613fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz break; 40713fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz } 408a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 40913fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz break; 4105c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 4115c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz * We should be handling all known exception types above, 4125c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz * if we get here we hit a reserved one, so panic 4135c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz */ 4141394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu default: 4155c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz info.si_code = ILL_ILLPARAOP; 4165c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz sig = SIGILL; 4179f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz verbose_printk(KERN_EMERG "Caught Unhandled Exception, code = %08lx\n", 4181394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu (fp->seqstat & SEQSTAT_EXCAUSE)); 419a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 4201394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 4211394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu } 4221394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 423226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz BUG_ON(sig == 0); 424226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz 42582bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger /* If the fault was caused by a kernel thread, or interrupt handler 42682bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger * we will kernel panic, so the system reboots. 42782bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger */ 42882bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger if (kernel_mode_regs(fp) || (current && !current->mm)) { 42982bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger console_verbose(); 43082bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger oops_in_progress = 1; 43182bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger } 43282bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger 433226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz if (sig != SIGTRAP) { 43415627bd35c6f02d159e0cb41d287dcba3a23a135Mike Frysinger if (strerror) 43515627bd35c6f02d159e0cb41d287dcba3a23a135Mike Frysinger verbose_printk(strerror); 43615627bd35c6f02d159e0cb41d287dcba3a23a135Mike Frysinger 43749dce9124b41984bf1e918847bc17929c2e8f80fMike Frysinger dump_bfin_process(fp); 438b03b08ba9c7235861adf4dde712dade0bb756fe0Robin Getz dump_bfin_mem(fp); 43949dce9124b41984bf1e918847bc17929c2e8f80fMike Frysinger show_regs(fp); 440226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz 441226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz /* Print out the trace buffer if it makes sense */ 442226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz#ifndef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE 443226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz if (trapnr == VEC_CPLB_I_M || trapnr == VEC_CPLB_M) 4449f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz verbose_printk(KERN_NOTICE "No trace since you do not have " 445ad361c9884e809340f6daca80d56a9e9c871690aJoe Perches "CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE enabled\n\n"); 446226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz else 447226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz#endif 448226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz dump_bfin_trace_buffer(); 449f09630bff51daaf427968c61c0f2370c64148e06Robin Getz 450226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz if (oops_in_progress) { 451f09630bff51daaf427968c61c0f2370c64148e06Robin Getz /* Dump the current kernel stack */ 452ad361c9884e809340f6daca80d56a9e9c871690aJoe Perches verbose_printk(KERN_NOTICE "Kernel Stack\n"); 453f09630bff51daaf427968c61c0f2370c64148e06Robin Getz show_stack(current, NULL); 454aee3a29240ad167ad7875d859506d8bb90431c70Robin Getz print_modules(); 455226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz#ifndef CONFIG_ACCESS_CHECK 4569f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz verbose_printk(KERN_EMERG "Please turn on " 45790c7f4686f82aef875aadf8e5c9c1a9465e5143bRobin Getz "CONFIG_ACCESS_CHECK\n"); 458226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz#endif 4591394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu panic("Kernel exception"); 460f09630bff51daaf427968c61c0f2370c64148e06Robin Getz } else { 4614ee1c45337e7b529eed644c6f62399d797dcbc10Robin Getz#ifdef CONFIG_DEBUG_VERBOSE 4629f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz unsigned long *stack; 463f09630bff51daaf427968c61c0f2370c64148e06Robin Getz /* Dump the user space stack */ 464f09630bff51daaf427968c61c0f2370c64148e06Robin Getz stack = (unsigned long *)rdusp(); 4659f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz verbose_printk(KERN_NOTICE "Userspace Stack\n"); 466f09630bff51daaf427968c61c0f2370c64148e06Robin Getz show_stack(NULL, stack); 4679f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz#endif 468226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz } 4691394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu } 470fb322915a05804a3a153f714f2f08e4c32ce84c7Robin Getz 4716a01f230339321292cf065551f8cf55361052461Yi Li#ifdef CONFIG_IPIPE 4726a01f230339321292cf065551f8cf55361052461Yi Li if (!ipipe_trap_notify(fp->seqstat & 0x3f, fp)) 4736a01f230339321292cf065551f8cf55361052461Yi Li#endif 4746a01f230339321292cf065551f8cf55361052461Yi Li { 4756a01f230339321292cf065551f8cf55361052461Yi Li info.si_signo = sig; 4766a01f230339321292cf065551f8cf55361052461Yi Li info.si_errno = 0; 4775e8d3210b5bffbe64afca9152241284a46611c7eBarry Song switch (trapnr) { 4785e8d3210b5bffbe64afca9152241284a46611c7eBarry Song case VEC_CPLB_VL: 4795e8d3210b5bffbe64afca9152241284a46611c7eBarry Song case VEC_MISALI_D: 4805e8d3210b5bffbe64afca9152241284a46611c7eBarry Song case VEC_CPLB_M: 4815e8d3210b5bffbe64afca9152241284a46611c7eBarry Song case VEC_CPLB_MHIT: 4825e8d3210b5bffbe64afca9152241284a46611c7eBarry Song info.si_addr = (void __user *)cpu_pda[cpu].dcplb_fault_addr; 4835e8d3210b5bffbe64afca9152241284a46611c7eBarry Song break; 4845e8d3210b5bffbe64afca9152241284a46611c7eBarry Song default: 4855e8d3210b5bffbe64afca9152241284a46611c7eBarry Song info.si_addr = (void __user *)fp->pc; 4865e8d3210b5bffbe64afca9152241284a46611c7eBarry Song break; 4875e8d3210b5bffbe64afca9152241284a46611c7eBarry Song } 4886a01f230339321292cf065551f8cf55361052461Yi Li force_sig_info(sig, &info, current); 4896a01f230339321292cf065551f8cf55361052461Yi Li } 4901394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 4910e4edcf0b0f7d96c4be7788b13bee82e4d3ba0ceRobin Getz if ((ANOMALY_05000461 && trapnr == VEC_HWERR && !access_ok(VERIFY_READ, fp->pc, 8)) || 492f574a76a3b19848ac61814756716e26f85f2c3f7Robin Getz (ANOMALY_05000281 && trapnr == VEC_HWERR) || 493f574a76a3b19848ac61814756716e26f85f2c3f7Robin Getz (ANOMALY_05000189 && (trapnr == VEC_CPLB_I_VL || trapnr == VEC_CPLB_VL))) 4940acad8dfee6bde7e246a95a52f864a8eee777ed8Robin Getz fp->pc = SAFE_USER_INSTRUCTION; 4950acad8dfee6bde7e246a95a52f864a8eee777ed8Robin Getz 4966510a20e1b1a3a5703429a09d03adf44882ae373Mike Frysinger traps_done: 4971394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu trace_buffer_restore(j); 4981394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu} 4991394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 5002a12c4632db1c0c548a7023e63869b27c7789a92Robin Getzasmlinkage void double_fault_c(struct pt_regs *fp) 5011394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu{ 502518039bc24cbb9ce34665814fe120eac50bedd9aRobin Getz#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON 5032a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz int j; 5042a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz trace_buffer_save(j); 505518039bc24cbb9ce34665814fe120eac50bedd9aRobin Getz#endif 5061394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 5072a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz console_verbose(); 5082a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz oops_in_progress = 1; 5099f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz#ifdef CONFIG_DEBUG_VERBOSE 5102a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz printk(KERN_EMERG "Double Fault\n"); 5112a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz#ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT 5122a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz if (((long)fp->seqstat & SEQSTAT_EXCAUSE) == VEC_UNCOV) { 5132a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz unsigned int cpu = raw_smp_processor_id(); 5142a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz char buf[150]; 5152a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz decode_address(buf, cpu_pda[cpu].retx_doublefault); 5162a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz printk(KERN_EMERG "While handling exception (EXCAUSE = 0x%x) at %s:\n", 5172a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz (unsigned int)cpu_pda[cpu].seqstat_doublefault & SEQSTAT_EXCAUSE, buf); 5182a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz decode_address(buf, cpu_pda[cpu].dcplb_doublefault_addr); 5192a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz printk(KERN_NOTICE " DCPLB_FAULT_ADDR: %s\n", buf); 5202a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz decode_address(buf, cpu_pda[cpu].icplb_doublefault_addr); 5212a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz printk(KERN_NOTICE " ICPLB_FAULT_ADDR: %s\n", buf); 5229a62ca40fd793742f92565104c6b44319af8c282Robin Getz 5232a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz decode_address(buf, fp->retx); 5242a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz printk(KERN_NOTICE "The instruction at %s caused a double exception\n", buf); 52549dce9124b41984bf1e918847bc17929c2e8f80fMike Frysinger } else 5269ba3c24f10c948dadac2ca91ed714dfbcedd61caRobin Getz#endif 5272a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz { 5282a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz dump_bfin_process(fp); 5292a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz dump_bfin_mem(fp); 5302a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz show_regs(fp); 5312a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz dump_bfin_trace_buffer(); 532226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz } 5331394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu#endif 5342a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz panic("Double Fault - unrecoverable event"); 5351394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 5361394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu} 5371394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 5381ffe6646babf8471714e649849ec2c9662bf410cMike Frysinger 5391394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wuvoid panic_cplb_error(int cplb_panic, struct pt_regs *fp) 5401394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu{ 5411394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu switch (cplb_panic) { 5421394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case CPLB_NO_UNLOCKED: 5431394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu printk(KERN_EMERG "All CPLBs are locked\n"); 5441394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 5451394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case CPLB_PROT_VIOL: 5461394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu return; 5471394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case CPLB_NO_ADDR_MATCH: 5481394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu return; 5491394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case CPLB_UNKNOWN_ERR: 5501394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu printk(KERN_EMERG "Unknown CPLB Exception\n"); 5511394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 5521394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu } 5531394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 554226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz oops_in_progress = 1; 555226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz 55649dce9124b41984bf1e918847bc17929c2e8f80fMike Frysinger dump_bfin_process(fp); 557b03b08ba9c7235861adf4dde712dade0bb756fe0Robin Getz dump_bfin_mem(fp); 55849dce9124b41984bf1e918847bc17929c2e8f80fMike Frysinger show_regs(fp); 5591394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu dump_stack(); 560d8804adf52f5991388fa9af77428e4cc7768059dMike Frysinger panic("Unrecoverable event"); 5611394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu} 5622a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz 5632a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz#ifdef CONFIG_BUG 5642a12c4632db1c0c548a7023e63869b27c7789a92Robin Getzint is_valid_bugaddr(unsigned long addr) 5652a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz{ 5669a95e2f1008ee433c496a81628cdde67acc8e4b1Robin Getz unsigned int opcode; 5672a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz 5682a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz if (!get_instruction(&opcode, (unsigned short *)addr)) 5692a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz return 0; 5702a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz 5712a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz return opcode == BFIN_BUG_OPCODE; 5722a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz} 5732a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz#endif 574d28cff4b615c2da274922311cef024d52c839870Robin Getz 575d28cff4b615c2da274922311cef024d52c839870Robin Getz/* stub this out */ 576d28cff4b615c2da274922311cef024d52c839870Robin Getz#ifndef CONFIG_DEBUG_VERBOSE 577d28cff4b615c2da274922311cef024d52c839870Robin Getzvoid show_regs(struct pt_regs *fp) 578d28cff4b615c2da274922311cef024d52c839870Robin Getz{ 579d28cff4b615c2da274922311cef024d52c839870Robin Getz 580d28cff4b615c2da274922311cef024d52c839870Robin Getz} 581d28cff4b615c2da274922311cef024d52c839870Robin Getz#endif 582