traps.c revision 3bed8d67469cc7129b0babc0211c32fa68408ce0
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> 203bed8d67469cc7129b0babc0211c32fa68408ce0David Howells#include <asm/pda.h> 211394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 221394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu#ifdef CONFIG_KGDB 231394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu# include <linux/kgdb.h> 24226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz 25226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz# define CHK_DEBUGGER_TRAP() \ 26226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz do { \ 27a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang kgdb_handle_exception(trapnr, sig, info.si_code, fp); \ 28226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz } while (0) 29226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz# define CHK_DEBUGGER_TRAP_MAYBE() \ 30226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz do { \ 31226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz if (kgdb_connected) \ 32226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz CHK_DEBUGGER_TRAP(); \ 33226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz } while (0) 34226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz#else 35226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz# define CHK_DEBUGGER_TRAP() do { } while (0) 36226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz# define CHK_DEBUGGER_TRAP_MAYBE() do { } while (0) 371394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu#endif 381394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 399f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz 404ee1c45337e7b529eed644c6f62399d797dcbc10Robin Getz#ifdef CONFIG_DEBUG_VERBOSE 419f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz#define verbose_printk(fmt, arg...) \ 429f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz printk(fmt, ##arg) 439f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz#else 449f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz#define verbose_printk(fmt, arg...) \ 459f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz ({ if (0) printk(fmt, ##arg); 0; }) 469f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz#endif 479f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz 4881f7f45606812f1d15d618c2646d0f33ca111f87Robin Getz#if defined(CONFIG_DEBUG_MMRS) || defined(CONFIG_DEBUG_MMRS_MODULE) 4981f7f45606812f1d15d618c2646d0f33ca111f87Robin Getzu32 last_seqstat; 5081f7f45606812f1d15d618c2646d0f33ca111f87Robin Getz#ifdef CONFIG_DEBUG_MMRS_MODULE 5181f7f45606812f1d15d618c2646d0f33ca111f87Robin GetzEXPORT_SYMBOL(last_seqstat); 5281f7f45606812f1d15d618c2646d0f33ca111f87Robin Getz#endif 5381f7f45606812f1d15d618c2646d0f33ca111f87Robin Getz#endif 5481f7f45606812f1d15d618c2646d0f33ca111f87Robin Getz 551394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu/* Initiate the event table handler */ 561394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wuvoid __init trap_init(void) 571394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu{ 581394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu CSYNC(); 591394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu bfin_write_EVT3(trap); 601394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu CSYNC(); 611394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu} 621394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 6382bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysingerstatic int kernel_mode_regs(struct pt_regs *regs) 6482bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger{ 6582bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger return regs->ipend & 0xffc0; 6682bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger} 6782bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger 68c4baebf2683d16f24a84a99268ef5f7318905337Yi Liasmlinkage notrace void trap_c(struct pt_regs *fp) 691394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu{ 70518039bc24cbb9ce34665814fe120eac50bedd9aRobin Getz#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON 71518039bc24cbb9ce34665814fe120eac50bedd9aRobin Getz int j; 72518039bc24cbb9ce34665814fe120eac50bedd9aRobin Getz#endif 736ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz#ifdef CONFIG_BFIN_PSEUDODBG_INSNS 746ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz int opcode; 756ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz#endif 76b6dbde27dd95cc0397d9722ad8365fa93a07b0d3Yi Li unsigned int cpu = raw_smp_processor_id(); 7782bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger const char *strerror = NULL; 78518039bc24cbb9ce34665814fe120eac50bedd9aRobin Getz int sig = 0; 791394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu siginfo_t info; 801394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE; 811394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 82226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz trace_buffer_save(j); 8381f7f45606812f1d15d618c2646d0f33ca111f87Robin Getz#if defined(CONFIG_DEBUG_MMRS) || defined(CONFIG_DEBUG_MMRS_MODULE) 8481f7f45606812f1d15d618c2646d0f33ca111f87Robin Getz last_seqstat = (u32)fp->seqstat; 8581f7f45606812f1d15d618c2646d0f33ca111f87Robin Getz#endif 86226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz 87226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz /* Important - be very careful dereferncing pointers - will lead to 88226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz * double faults if the stack has become corrupt 89226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz */ 90226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz 911394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* trap_c() will be called for exceptions. During exceptions 921394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu * processing, the pc value should be set with retx value. 931394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu * With this change we can cleanup some code in signal.c- TODO 941394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu */ 951394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu fp->orig_pc = fp->retx; 961394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* printk("exception: 0x%x, ipend=%x, reti=%x, retx=%x\n", 971394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu trapnr, fp->ipend, fp->pc, fp->retx); */ 981394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 991394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* send the appropriate signal to the user program */ 1001394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu switch (trapnr) { 1011394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 10225985edcedea6396277003854657b5f3cb31a628Lucas De Marchi /* This table works in conjunction with the one in ./mach-common/entry.S 1031394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu * Some exceptions are handled there (in assembly, in exception space) 1041394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu * Some are handled here, (in C, in interrupt space) 1051394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu * Some, like CPLB, are handled in both, where the normal path is 1061394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu * handled in assembly/exception space, and the error path is handled 1071394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu * here 1081394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu */ 1091394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 1101394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x00 - Linux Syscall, getting here is an error */ 1111394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x01 - userspace gdb breakpoint, handled here */ 1121394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_EXCPT01: 1131394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = TRAP_ILLTRAP; 1141394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGTRAP; 1151394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu CHK_DEBUGGER_TRAP_MAYBE(); 1161394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* Check if this is a breakpoint in kernel space */ 11782bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger if (kernel_mode_regs(fp)) 1186510a20e1b1a3a5703429a09d03adf44882ae373Mike Frysinger goto traps_done; 1191394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu else 1201394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 1219401e618c8f70920f34893946239e24d40a3519aMike Frysinger /* 0x03 - User Defined, userspace stack overflow */ 1221394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_EXCPT03: 1231394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = SEGV_STACKFLOW; 1241394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGSEGV; 12582bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x03(KERN_NOTICE); 126a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 1271394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 12827707d3e43e3a9c53e75cd7769f3ef74b1d56625Sonic Zhang /* 0x02 - KGDB initial connection and break signal trap */ 12927707d3e43e3a9c53e75cd7769f3ef74b1d56625Sonic Zhang case VEC_EXCPT02: 13027707d3e43e3a9c53e75cd7769f3ef74b1d56625Sonic Zhang#ifdef CONFIG_KGDB 13127707d3e43e3a9c53e75cd7769f3ef74b1d56625Sonic Zhang info.si_code = TRAP_ILLTRAP; 13227707d3e43e3a9c53e75cd7769f3ef74b1d56625Sonic Zhang sig = SIGTRAP; 13327707d3e43e3a9c53e75cd7769f3ef74b1d56625Sonic Zhang CHK_DEBUGGER_TRAP(); 1346510a20e1b1a3a5703429a09d03adf44882ae373Mike Frysinger goto traps_done; 13527707d3e43e3a9c53e75cd7769f3ef74b1d56625Sonic Zhang#endif 1365c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x04 - User Defined */ 1375c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x05 - User Defined */ 1385c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x06 - User Defined */ 1395c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x07 - User Defined */ 1405c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x08 - User Defined */ 1415c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x09 - User Defined */ 1425c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x0A - User Defined */ 1435c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x0B - User Defined */ 1445c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x0C - User Defined */ 1455c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x0D - User Defined */ 1465c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x0E - User Defined */ 1475c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 0x0F - User Defined */ 14827707d3e43e3a9c53e75cd7769f3ef74b1d56625Sonic Zhang /* If we got here, it is most likely that someone was trying to use a 1495c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz * custom exception handler, and it is not actually installed properly 1505c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz */ 1515c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz case VEC_EXCPT04 ... VEC_EXCPT15: 1525c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz info.si_code = ILL_ILLPARAOP; 1535c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz sig = SIGILL; 15482bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x04(KERN_NOTICE); 1555c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz CHK_DEBUGGER_TRAP_MAYBE(); 1565c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz break; 1571394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x10 HW Single step, handled here */ 1581394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_STEP: 1591394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = TRAP_STEP; 1601394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGTRAP; 1611394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu CHK_DEBUGGER_TRAP_MAYBE(); 1621394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* Check if this is a single step in kernel space */ 16382bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger if (kernel_mode_regs(fp)) 1646510a20e1b1a3a5703429a09d03adf44882ae373Mike Frysinger goto traps_done; 1651394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu else 1661394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 1671394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x11 - Trace Buffer Full, handled here */ 1681394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_OVFLOW: 1691394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = TRAP_TRACEFLOW; 1701394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGTRAP; 17182bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x11(KERN_NOTICE); 172a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 1731394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 1741394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x12 - Reserved, Caught by default */ 1751394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x13 - Reserved, Caught by default */ 1761394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x14 - Reserved, Caught by default */ 1771394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x15 - Reserved, Caught by default */ 1781394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x16 - Reserved, Caught by default */ 1791394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x17 - Reserved, Caught by default */ 1801394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x18 - Reserved, Caught by default */ 1811394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x19 - Reserved, Caught by default */ 1821394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x1A - Reserved, Caught by default */ 1831394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x1B - Reserved, Caught by default */ 1841394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x1C - Reserved, Caught by default */ 1851394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x1D - Reserved, Caught by default */ 1861394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x1E - Reserved, Caught by default */ 1871394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x1F - Reserved, Caught by default */ 1881394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x20 - Reserved, Caught by default */ 1891394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x21 - Undefined Instruction, handled here */ 1901394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_UNDEF_I: 19170f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger#ifdef CONFIG_BUG 19270f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger if (kernel_mode_regs(fp)) { 19370f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger switch (report_bug(fp->pc, fp)) { 19470f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger case BUG_TRAP_TYPE_NONE: 19570f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger break; 19670f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger case BUG_TRAP_TYPE_WARN: 19770f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger dump_bfin_trace_buffer(); 19870f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger fp->pc += 2; 19970f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger goto traps_done; 20070f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger case BUG_TRAP_TYPE_BUG: 20170f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger /* call to panic() will dump trace, and it is 20270f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger * off at this point, so it won't be clobbered 20370f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger */ 20470f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger panic("BUG()"); 20570f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger } 20670f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger } 20770f12567ac9aca9c2f242ae060d7de245904889eMike Frysinger#endif 2086ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz#ifdef CONFIG_BFIN_PSEUDODBG_INSNS 2096ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz /* 2106ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz * Support for the fake instructions, if the instruction fails, 2116ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz * then just execute a illegal opcode failure (like normal). 2126ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz * Don't support these instructions inside the kernel 2136ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz */ 2146ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz if (!kernel_mode_regs(fp) && get_instruction(&opcode, (unsigned short *)fp->pc)) { 2156ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz if (execute_pseudodbg_assert(fp, opcode)) 2166ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz goto traps_done; 217dc89d97fc73176c883b32ff21ae6f1164ca20d05Robin Getz if (execute_pseudodbg(fp, opcode)) 218dc89d97fc73176c883b32ff21ae6f1164ca20d05Robin Getz goto traps_done; 2196ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz } 2206ce3e9c2a2cfb8849dd471349fe5e6bc37c0f13fRobin Getz#endif 2211394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = ILL_ILLOPC; 2221394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGILL; 22382bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x21(KERN_NOTICE); 224a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 2251394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 2261394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x22 - Illegal Instruction Combination, handled here */ 2271394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_ILGAL_I: 2281394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = ILL_ILLPARAOP; 2291394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGILL; 23082bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x22(KERN_NOTICE); 231a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 2321394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 233f26fbc48f130962fce15f37d079968f0f272e0c2Robin Getz /* 0x23 - Data CPLB protection violation, handled here */ 2341394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_CPLB_VL: 2351394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = ILL_CPLB_VI; 23636b841288656b9b30b5d2add2fd136ac7eab5867Graf Yang sig = SIGSEGV; 23782bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x23(KERN_NOTICE); 238a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 2391394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 2401394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x24 - Data access misaligned, handled here */ 2411394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_MISALI_D: 2421394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = BUS_ADRALN; 2431394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGBUS; 24482bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x24(KERN_NOTICE); 245a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 2461394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 2471394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x25 - Unrecoverable Event, handled here */ 2481394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_UNCOV: 2491394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = ILL_ILLEXCPT; 2501394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGILL; 25182bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x25(KERN_NOTICE); 252a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 2531394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 2541394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x26 - Data CPLB Miss, normal case is handled in _cplb_hdr, 2551394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu error case is handled here */ 2561394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_CPLB_M: 2571394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = BUS_ADRALN; 2581394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGBUS; 25982bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x26(KERN_NOTICE); 2601394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 2611394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero, handled here */ 2621394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_CPLB_MHIT: 2631394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = ILL_CPLB_MULHIT; 2641394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGSEGV; 265c6c6f75d54ca734c409e336245662934c21fcee0Mike Frysinger#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO 2668f65873e47784a390949f0d61e5692dbf2a8253eGraf Yang if (cpu_pda[cpu].dcplb_fault_addr < FIXED_CODE_START) 26782bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE "NULL pointer access\n"; 268c6c6f75d54ca734c409e336245662934c21fcee0Mike Frysinger else 2691394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu#endif 27082bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x27(KERN_NOTICE); 271a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 2721394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 2731394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x28 - Emulation Watchpoint, handled here */ 2741394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_WATCH: 2751394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = TRAP_WATCHPT; 2761394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGTRAP; 277569a50ca3f56cd69199733580e7ca0e81029473aRobin Getz pr_debug(EXC_0x28(KERN_DEBUG)); 2781394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu CHK_DEBUGGER_TRAP_MAYBE(); 2791394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* Check if this is a watchpoint in kernel space */ 28082bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger if (kernel_mode_regs(fp)) 2816510a20e1b1a3a5703429a09d03adf44882ae373Mike Frysinger goto traps_done; 2821394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu else 2831394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 2841394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu#ifdef CONFIG_BF535 2851394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x29 - Instruction fetch access error (535 only) */ 2861394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_ISTRU_VL: /* ADSP-BF535 only (MH) */ 2871394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = BUS_OPFETCH; 2881394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGBUS; 28982bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE "BF535: VEC_ISTRU_VL\n"; 290a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 2911394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 2921394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu#else 2931394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x29 - Reserved, Caught by default */ 2941394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu#endif 2951394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x2A - Instruction fetch misaligned, handled here */ 2961394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_MISALI_I: 2971394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = BUS_ADRALN; 2981394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGBUS; 29982bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x2A(KERN_NOTICE); 300a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 3011394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 302f26fbc48f130962fce15f37d079968f0f272e0c2Robin Getz /* 0x2B - Instruction CPLB protection violation, handled here */ 3031394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_CPLB_I_VL: 3041394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = ILL_CPLB_VI; 305f26fbc48f130962fce15f37d079968f0f272e0c2Robin Getz sig = SIGBUS; 30682bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x2B(KERN_NOTICE); 307a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 3081394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 3091394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x2C - Instruction CPLB miss, handled in _cplb_hdr */ 3101394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_CPLB_I_M: 3111394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = ILL_CPLB_MISS; 3121394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGBUS; 31382bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x2C(KERN_NOTICE); 3141394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 3151394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x2D - Instruction CPLB Multiple Hits, handled here */ 3161394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_CPLB_I_MHIT: 3171394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = ILL_CPLB_MULHIT; 3181394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGSEGV; 319c6c6f75d54ca734c409e336245662934c21fcee0Mike Frysinger#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO 3208f65873e47784a390949f0d61e5692dbf2a8253eGraf Yang if (cpu_pda[cpu].icplb_fault_addr < FIXED_CODE_START) 32182bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE "Jump to NULL address\n"; 322c6c6f75d54ca734c409e336245662934c21fcee0Mike Frysinger else 3231394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu#endif 32482bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x2D(KERN_NOTICE); 325a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 3261394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 3271394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x2E - Illegal use of Supervisor Resource, handled here */ 3281394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case VEC_ILL_RES: 3291394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu info.si_code = ILL_PRVOPC; 3301394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu sig = SIGILL; 33182bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE EXC_0x2E(KERN_NOTICE); 332a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 3331394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 3341394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x2F - Reserved, Caught by default */ 3351394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x30 - Reserved, Caught by default */ 3361394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x31 - Reserved, Caught by default */ 3371394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x32 - Reserved, Caught by default */ 3381394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x33 - Reserved, Caught by default */ 3391394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x34 - Reserved, Caught by default */ 3401394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x35 - Reserved, Caught by default */ 3411394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x36 - Reserved, Caught by default */ 3421394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x37 - Reserved, Caught by default */ 3431394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x38 - Reserved, Caught by default */ 3441394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x39 - Reserved, Caught by default */ 3451394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x3A - Reserved, Caught by default */ 3461394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x3B - Reserved, Caught by default */ 3471394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x3C - Reserved, Caught by default */ 3481394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x3D - Reserved, Caught by default */ 3491394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x3E - Reserved, Caught by default */ 3501394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu /* 0x3F - Reserved, Caught by default */ 35113fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz case VEC_HWERR: 35213fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz info.si_code = BUS_ADRALN; 35313fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz sig = SIGBUS; 35413fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz switch (fp->seqstat & SEQSTAT_HWERRCAUSE) { 35513fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz /* System MMR Error */ 35613fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz case (SEQSTAT_HWERRCAUSE_SYSTEM_MMR): 35713fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz info.si_code = BUS_ADRALN; 35813fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz sig = SIGBUS; 35982bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE HWC_x2(KERN_NOTICE); 36013fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz break; 36113fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz /* External Memory Addressing Error */ 36213fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz case (SEQSTAT_HWERRCAUSE_EXTERN_ADDR): 363a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song if (ANOMALY_05000310) { 364a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song static unsigned long anomaly_rets; 365a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song 366a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song if ((fp->pc >= (L1_CODE_START + L1_CODE_LENGTH - 512)) && 367a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song (fp->pc < (L1_CODE_START + L1_CODE_LENGTH))) { 368a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song /* 369a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song * A false hardware error will happen while fetching at 370a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song * the L1 instruction SRAM boundary. Ignore it. 371a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song */ 372a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song anomaly_rets = fp->rets; 373a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song goto traps_done; 374a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song } else if (fp->rets == anomaly_rets) { 375a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song /* 376a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song * While boundary code returns to a function, at the ret 377a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song * point, a new false hardware error might occur too based 378a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song * on tests. Ignore it too. 379a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song */ 380a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song goto traps_done; 381a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song } else if ((fp->rets >= (L1_CODE_START + L1_CODE_LENGTH - 512)) && 382a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song (fp->rets < (L1_CODE_START + L1_CODE_LENGTH))) { 383a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song /* 384a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song * If boundary code calls a function, at the entry point, 385a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song * a new false hardware error maybe happen based on tests. 386a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song * Ignore it too. 387a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song */ 388a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song goto traps_done; 389a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song } else 390a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song anomaly_rets = 0; 391a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song } 392a00b4fe5ce4b98f7c4457fffdb392d7bfece2e78Barry Song 39313fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz info.si_code = BUS_ADRERR; 39413fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz sig = SIGBUS; 39582bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE HWC_x3(KERN_NOTICE); 39613fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz break; 39713fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz /* Performance Monitor Overflow */ 39813fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz case (SEQSTAT_HWERRCAUSE_PERF_FLOW): 39982bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger strerror = KERN_NOTICE HWC_x12(KERN_NOTICE); 40013fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz break; 40113fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz /* RAISE 5 instruction */ 40213fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz case (SEQSTAT_HWERRCAUSE_RAISE_5): 40313fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz printk(KERN_NOTICE HWC_x18(KERN_NOTICE)); 40413fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz break; 40513fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz default: /* Reserved */ 40613fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz printk(KERN_NOTICE HWC_default(KERN_NOTICE)); 40713fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz break; 40813fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz } 409a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 41013fe24f37df20e580a5a364e67ec8cf3219d8f8cRobin Getz break; 4115c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz /* 4125c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz * We should be handling all known exception types above, 4135c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz * if we get here we hit a reserved one, so panic 4145c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz */ 4151394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu default: 4165c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz info.si_code = ILL_ILLPARAOP; 4175c64e0d5109532f8184be29c1dc163059e3ded4bRobin Getz sig = SIGILL; 4189f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz verbose_printk(KERN_EMERG "Caught Unhandled Exception, code = %08lx\n", 4191394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu (fp->seqstat & SEQSTAT_EXCAUSE)); 420a5ac0129249611fc4a35e6d7cd9b8462d67e5798Sonic Zhang CHK_DEBUGGER_TRAP_MAYBE(); 4211394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 4221394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu } 4231394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 424226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz BUG_ON(sig == 0); 425226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz 42682bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger /* If the fault was caused by a kernel thread, or interrupt handler 42782bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger * we will kernel panic, so the system reboots. 42882bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger */ 42982bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger if (kernel_mode_regs(fp) || (current && !current->mm)) { 43082bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger console_verbose(); 43182bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger oops_in_progress = 1; 43282bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger } 43382bd1d7d45a69c54fb6beedb78ccb1c7d308dd93Mike Frysinger 434226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz if (sig != SIGTRAP) { 43515627bd35c6f02d159e0cb41d287dcba3a23a135Mike Frysinger if (strerror) 43615627bd35c6f02d159e0cb41d287dcba3a23a135Mike Frysinger verbose_printk(strerror); 43715627bd35c6f02d159e0cb41d287dcba3a23a135Mike Frysinger 43849dce9124b41984bf1e918847bc17929c2e8f80fMike Frysinger dump_bfin_process(fp); 439b03b08ba9c7235861adf4dde712dade0bb756fe0Robin Getz dump_bfin_mem(fp); 44049dce9124b41984bf1e918847bc17929c2e8f80fMike Frysinger show_regs(fp); 441226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz 442226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz /* Print out the trace buffer if it makes sense */ 443226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz#ifndef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE 444226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz if (trapnr == VEC_CPLB_I_M || trapnr == VEC_CPLB_M) 4459f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz verbose_printk(KERN_NOTICE "No trace since you do not have " 446ad361c9884e809340f6daca80d56a9e9c871690aJoe Perches "CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE enabled\n\n"); 447226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz else 448226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz#endif 449226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz dump_bfin_trace_buffer(); 450f09630bff51daaf427968c61c0f2370c64148e06Robin Getz 451226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz if (oops_in_progress) { 452f09630bff51daaf427968c61c0f2370c64148e06Robin Getz /* Dump the current kernel stack */ 453ad361c9884e809340f6daca80d56a9e9c871690aJoe Perches verbose_printk(KERN_NOTICE "Kernel Stack\n"); 454f09630bff51daaf427968c61c0f2370c64148e06Robin Getz show_stack(current, NULL); 455aee3a29240ad167ad7875d859506d8bb90431c70Robin Getz print_modules(); 456226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz#ifndef CONFIG_ACCESS_CHECK 4579f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz verbose_printk(KERN_EMERG "Please turn on " 45890c7f4686f82aef875aadf8e5c9c1a9465e5143bRobin Getz "CONFIG_ACCESS_CHECK\n"); 459226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz#endif 4601394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu panic("Kernel exception"); 461f09630bff51daaf427968c61c0f2370c64148e06Robin Getz } else { 4624ee1c45337e7b529eed644c6f62399d797dcbc10Robin Getz#ifdef CONFIG_DEBUG_VERBOSE 4639f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz unsigned long *stack; 464f09630bff51daaf427968c61c0f2370c64148e06Robin Getz /* Dump the user space stack */ 465f09630bff51daaf427968c61c0f2370c64148e06Robin Getz stack = (unsigned long *)rdusp(); 4669f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz verbose_printk(KERN_NOTICE "Userspace Stack\n"); 467f09630bff51daaf427968c61c0f2370c64148e06Robin Getz show_stack(NULL, stack); 4689f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz#endif 469226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz } 4701394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu } 471fb322915a05804a3a153f714f2f08e4c32ce84c7Robin Getz 4726a01f230339321292cf065551f8cf55361052461Yi Li#ifdef CONFIG_IPIPE 4736a01f230339321292cf065551f8cf55361052461Yi Li if (!ipipe_trap_notify(fp->seqstat & 0x3f, fp)) 4746a01f230339321292cf065551f8cf55361052461Yi Li#endif 4756a01f230339321292cf065551f8cf55361052461Yi Li { 4766a01f230339321292cf065551f8cf55361052461Yi Li info.si_signo = sig; 4776a01f230339321292cf065551f8cf55361052461Yi Li info.si_errno = 0; 4785e8d3210b5bffbe64afca9152241284a46611c7eBarry Song switch (trapnr) { 4795e8d3210b5bffbe64afca9152241284a46611c7eBarry Song case VEC_CPLB_VL: 4805e8d3210b5bffbe64afca9152241284a46611c7eBarry Song case VEC_MISALI_D: 4815e8d3210b5bffbe64afca9152241284a46611c7eBarry Song case VEC_CPLB_M: 4825e8d3210b5bffbe64afca9152241284a46611c7eBarry Song case VEC_CPLB_MHIT: 4835e8d3210b5bffbe64afca9152241284a46611c7eBarry Song info.si_addr = (void __user *)cpu_pda[cpu].dcplb_fault_addr; 4845e8d3210b5bffbe64afca9152241284a46611c7eBarry Song break; 4855e8d3210b5bffbe64afca9152241284a46611c7eBarry Song default: 4865e8d3210b5bffbe64afca9152241284a46611c7eBarry Song info.si_addr = (void __user *)fp->pc; 4875e8d3210b5bffbe64afca9152241284a46611c7eBarry Song break; 4885e8d3210b5bffbe64afca9152241284a46611c7eBarry Song } 4896a01f230339321292cf065551f8cf55361052461Yi Li force_sig_info(sig, &info, current); 4906a01f230339321292cf065551f8cf55361052461Yi Li } 4911394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 4920e4edcf0b0f7d96c4be7788b13bee82e4d3ba0ceRobin Getz if ((ANOMALY_05000461 && trapnr == VEC_HWERR && !access_ok(VERIFY_READ, fp->pc, 8)) || 493f574a76a3b19848ac61814756716e26f85f2c3f7Robin Getz (ANOMALY_05000281 && trapnr == VEC_HWERR) || 494f574a76a3b19848ac61814756716e26f85f2c3f7Robin Getz (ANOMALY_05000189 && (trapnr == VEC_CPLB_I_VL || trapnr == VEC_CPLB_VL))) 4950acad8dfee6bde7e246a95a52f864a8eee777ed8Robin Getz fp->pc = SAFE_USER_INSTRUCTION; 4960acad8dfee6bde7e246a95a52f864a8eee777ed8Robin Getz 4976510a20e1b1a3a5703429a09d03adf44882ae373Mike Frysinger traps_done: 4981394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu trace_buffer_restore(j); 4991394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu} 5001394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 5012a12c4632db1c0c548a7023e63869b27c7789a92Robin Getzasmlinkage void double_fault_c(struct pt_regs *fp) 5021394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu{ 503518039bc24cbb9ce34665814fe120eac50bedd9aRobin Getz#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON 5042a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz int j; 5052a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz trace_buffer_save(j); 506518039bc24cbb9ce34665814fe120eac50bedd9aRobin Getz#endif 5071394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 5082a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz console_verbose(); 5092a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz oops_in_progress = 1; 5109f06c38fb230720371397a57faa24aa6e31b2c87Robin Getz#ifdef CONFIG_DEBUG_VERBOSE 5112a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz printk(KERN_EMERG "Double Fault\n"); 5122a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz#ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT 5132a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz if (((long)fp->seqstat & SEQSTAT_EXCAUSE) == VEC_UNCOV) { 5142a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz unsigned int cpu = raw_smp_processor_id(); 5152a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz char buf[150]; 5162a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz decode_address(buf, cpu_pda[cpu].retx_doublefault); 5172a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz printk(KERN_EMERG "While handling exception (EXCAUSE = 0x%x) at %s:\n", 5182a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz (unsigned int)cpu_pda[cpu].seqstat_doublefault & SEQSTAT_EXCAUSE, buf); 5192a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz decode_address(buf, cpu_pda[cpu].dcplb_doublefault_addr); 5202a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz printk(KERN_NOTICE " DCPLB_FAULT_ADDR: %s\n", buf); 5212a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz decode_address(buf, cpu_pda[cpu].icplb_doublefault_addr); 5222a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz printk(KERN_NOTICE " ICPLB_FAULT_ADDR: %s\n", buf); 5239a62ca40fd793742f92565104c6b44319af8c282Robin Getz 5242a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz decode_address(buf, fp->retx); 5252a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz printk(KERN_NOTICE "The instruction at %s caused a double exception\n", buf); 52649dce9124b41984bf1e918847bc17929c2e8f80fMike Frysinger } else 5279ba3c24f10c948dadac2ca91ed714dfbcedd61caRobin Getz#endif 5282a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz { 5292a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz dump_bfin_process(fp); 5302a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz dump_bfin_mem(fp); 5312a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz show_regs(fp); 5322a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz dump_bfin_trace_buffer(); 533226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz } 5341394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu#endif 5352a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz panic("Double Fault - unrecoverable event"); 5361394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 5371394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu} 5381394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 5391ffe6646babf8471714e649849ec2c9662bf410cMike Frysinger 5401394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wuvoid panic_cplb_error(int cplb_panic, struct pt_regs *fp) 5411394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu{ 5421394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu switch (cplb_panic) { 5431394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case CPLB_NO_UNLOCKED: 5441394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu printk(KERN_EMERG "All CPLBs are locked\n"); 5451394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 5461394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case CPLB_PROT_VIOL: 5471394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu return; 5481394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case CPLB_NO_ADDR_MATCH: 5491394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu return; 5501394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu case CPLB_UNKNOWN_ERR: 5511394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu printk(KERN_EMERG "Unknown CPLB Exception\n"); 5521394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu break; 5531394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu } 5541394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu 555226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz oops_in_progress = 1; 556226eb1ef523a33c66193bc319a92c647e47311d4Robin Getz 55749dce9124b41984bf1e918847bc17929c2e8f80fMike Frysinger dump_bfin_process(fp); 558b03b08ba9c7235861adf4dde712dade0bb756fe0Robin Getz dump_bfin_mem(fp); 55949dce9124b41984bf1e918847bc17929c2e8f80fMike Frysinger show_regs(fp); 5601394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu dump_stack(); 561d8804adf52f5991388fa9af77428e4cc7768059dMike Frysinger panic("Unrecoverable event"); 5621394f03221790a988afc3e4b3cb79f2e477246a9Bryan Wu} 5632a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz 5642a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz#ifdef CONFIG_BUG 5652a12c4632db1c0c548a7023e63869b27c7789a92Robin Getzint is_valid_bugaddr(unsigned long addr) 5662a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz{ 5679a95e2f1008ee433c496a81628cdde67acc8e4b1Robin Getz unsigned int opcode; 5682a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz 5692a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz if (!get_instruction(&opcode, (unsigned short *)addr)) 5702a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz return 0; 5712a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz 5722a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz return opcode == BFIN_BUG_OPCODE; 5732a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz} 5742a12c4632db1c0c548a7023e63869b27c7789a92Robin Getz#endif 575d28cff4b615c2da274922311cef024d52c839870Robin Getz 576d28cff4b615c2da274922311cef024d52c839870Robin Getz/* stub this out */ 577d28cff4b615c2da274922311cef024d52c839870Robin Getz#ifndef CONFIG_DEBUG_VERBOSE 578d28cff4b615c2da274922311cef024d52c839870Robin Getzvoid show_regs(struct pt_regs *fp) 579d28cff4b615c2da274922311cef024d52c839870Robin Getz{ 580d28cff4b615c2da274922311cef024d52c839870Robin Getz 581d28cff4b615c2da274922311cef024d52c839870Robin Getz} 582d28cff4b615c2da274922311cef024d52c839870Robin Getz#endif 583