X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=arch%2Fblackfin%2Fkernel%2Ftraps.c;h=18c6cd4150f82df3636508f10d0f73e23382e597;hb=407505dc01ac2b4f2944cd3c6a0c02473ffb869e;hp=56058b0b6d4a604954938c5f1964e4e58d2f66cc;hpb=da1f95b4c41e09ef96869552db587452e0da46d6;p=safe%2Fjmp%2Flinux-2.6 diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c index 56058b0..18c6cd4 100644 --- a/arch/blackfin/kernel/traps.c +++ b/arch/blackfin/kernel/traps.c @@ -27,19 +27,54 @@ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ -#include +#include +#include +#include +#include +#include +#include +#include #include #include +#include +#include #include -#include #include -#include -#include -#include +#include +#include +#include #ifdef CONFIG_KGDB -# include # include + +# define CHK_DEBUGGER_TRAP() \ + do { \ + kgdb_handle_exception(trapnr, sig, info.si_code, fp); \ + } while (0) +# define CHK_DEBUGGER_TRAP_MAYBE() \ + do { \ + if (kgdb_connected) \ + CHK_DEBUGGER_TRAP(); \ + } while (0) +#else +# define CHK_DEBUGGER_TRAP() do { } while (0) +# define CHK_DEBUGGER_TRAP_MAYBE() do { } while (0) +#endif + + +#ifdef CONFIG_DEBUG_VERBOSE +#define verbose_printk(fmt, arg...) \ + printk(fmt, ##arg) +#else +#define verbose_printk(fmt, arg...) \ + ({ if (0) printk(fmt, ##arg); 0; }) +#endif + +#if defined(CONFIG_DEBUG_MMRS) || defined(CONFIG_DEBUG_MMRS_MODULE) +u32 last_seqstat; +#ifdef CONFIG_DEBUG_MMRS_MODULE +EXPORT_SYMBOL(last_seqstat); +#endif #endif /* Initiate the event table handler */ @@ -50,16 +85,14 @@ void __init trap_init(void) CSYNC(); } -asmlinkage void trap_c(struct pt_regs *fp); - -int kstack_depth_to_print = 48; - -static int printk_address(unsigned long address) +static void decode_address(char *buf, unsigned long address) { - struct vm_list_struct *vml; +#ifdef CONFIG_DEBUG_VERBOSE struct task_struct *p; struct mm_struct *mm; - unsigned long offset; + unsigned long flags, offset; + unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic(); + struct rb_node *n; #ifdef CONFIG_KALLSYMS unsigned long symsize; @@ -67,7 +100,11 @@ static int printk_address(unsigned long address) char *modname; char *delim = ":"; char namebuf[128]; +#endif + buf += sprintf(buf, "<0x%08lx> ", address); + +#ifdef CONFIG_KALLSYMS /* look up the address and see if we are in kernel space */ symname = kallsyms_lookup(address, &symsize, &offset, &modname, namebuf); @@ -75,94 +112,172 @@ static int printk_address(unsigned long address) /* yeah! kernel space! */ if (!modname) modname = delim = ""; - return printk("<0x%p> { %s%s%s%s + 0x%lx }", - (void*)address, delim, modname, delim, symname, - (unsigned long)offset); - + sprintf(buf, "{ %s%s%s%s + 0x%lx }", + delim, modname, delim, symname, + (unsigned long)offset); + return; } #endif + if (address >= FIXED_CODE_START && address < FIXED_CODE_END) { + /* Problem in fixed code section? */ + strcat(buf, "/* Maybe fixed code section */"); + return; + + } else if (address < CONFIG_BOOT_LOAD) { + /* Problem somewhere before the kernel start address */ + strcat(buf, "/* Maybe null pointer? */"); + return; + + } else if (address >= COREMMR_BASE) { + strcat(buf, "/* core mmrs */"); + return; + + } else if (address >= SYSMMR_BASE) { + strcat(buf, "/* system mmrs */"); + return; + + } else if (address >= L1_ROM_START && address < L1_ROM_START + L1_ROM_LENGTH) { + strcat(buf, "/* on-chip L1 ROM */"); + return; + } + /* looks like we're off in user-land, so let's walk all the * mappings of all our processes and see if we can't be a whee * bit more specific */ - write_lock_irq(&tasklist_lock); + write_lock_irqsave(&tasklist_lock, flags); for_each_process(p) { - mm = get_task_mm(p); + mm = (in_atomic ? p->mm : get_task_mm(p)); if (!mm) continue; - vml = mm->context.vmlist; - while (vml) { - struct vm_area_struct *vma = vml->vma; + for (n = rb_first(&mm->mm_rb); n; n = rb_next(n)) { + struct vm_area_struct *vma; + + vma = rb_entry(n, struct vm_area_struct, vm_rb); if (address >= vma->vm_start && address < vma->vm_end) { + char _tmpbuf[256]; char *name = p->comm; struct file *file = vma->vm_file; + if (file) { - char _tmpbuf[256]; - name = d_path(file->f_dentry, - file->f_vfsmnt, - _tmpbuf, - sizeof(_tmpbuf)); + char *d_name = d_path(&file->f_path, _tmpbuf, + sizeof(_tmpbuf)); + if (!IS_ERR(d_name)) + name = d_name; } /* FLAT does not have its text aligned to the start of * the map while FDPIC ELF does ... */ - if (current->mm && - (address > current->mm->start_code) && - (address < current->mm->end_code)) - offset = address - current->mm->start_code; - else - offset = (address - vma->vm_start) + (vma->vm_pgoff << PAGE_SHIFT); - write_unlock_irq(&tasklist_lock); - return printk("<0x%p> [ %s + 0x%lx ]", - (void*)address, name, offset); - } + /* before we can check flat/fdpic, we need to + * make sure current is valid + */ + if ((unsigned long)current >= FIXED_CODE_START && + !((unsigned long)current & 0x3)) { + if (current->mm && + (address > current->mm->start_code) && + (address < current->mm->end_code)) + offset = address - current->mm->start_code; + else + offset = (address - vma->vm_start) + + (vma->vm_pgoff << PAGE_SHIFT); + + sprintf(buf, "[ %s + 0x%lx ]", name, offset); + } else + sprintf(buf, "[ %s vma:0x%lx-0x%lx]", + name, vma->vm_start, vma->vm_end); - vml = vml->next; + if (!in_atomic) + mmput(mm); + + if (buf[0] == '\0') + sprintf(buf, "[ %s ] dynamic memory", name); + + goto done; + } } + if (!in_atomic) + mmput(mm); } - write_unlock_irq(&tasklist_lock); /* we were unable to find this address anywhere */ - return printk("[<0x%p>]", (void*)address); + sprintf(buf, "/* kernel dynamic memory */"); + +done: + write_unlock_irqrestore(&tasklist_lock, flags); +#else + sprintf(buf, " "); +#endif } -#define trace_buffer_save(x) \ - do { \ - (x) = bfin_read_TBUFCTL(); \ - bfin_write_TBUFCTL((x) & ~TBUFEN); \ - } while (0) -#define trace_buffer_restore(x) \ - do { \ - bfin_write_TBUFCTL((x)); \ - } while (0) +asmlinkage void double_fault_c(struct pt_regs *fp) +{ +#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON + int j; + trace_buffer_save(j); +#endif + + console_verbose(); + oops_in_progress = 1; +#ifdef CONFIG_DEBUG_VERBOSE + printk(KERN_EMERG "Double Fault\n"); +#ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT + if (((long)fp->seqstat & SEQSTAT_EXCAUSE) == VEC_UNCOV) { + unsigned int cpu = smp_processor_id(); + char buf[150]; + decode_address(buf, cpu_pda[cpu].retx); + printk(KERN_EMERG "While handling exception (EXCAUSE = 0x%x) at %s:\n", + (unsigned int)cpu_pda[cpu].seqstat & SEQSTAT_EXCAUSE, buf); + decode_address(buf, cpu_pda[cpu].dcplb_fault_addr); + printk(KERN_NOTICE " DCPLB_FAULT_ADDR: %s\n", buf); + decode_address(buf, cpu_pda[cpu].icplb_fault_addr); + printk(KERN_NOTICE " ICPLB_FAULT_ADDR: %s\n", buf); + + decode_address(buf, fp->retx); + printk(KERN_NOTICE "The instruction at %s caused a double exception\n", buf); + } else +#endif + { + dump_bfin_process(fp); + dump_bfin_mem(fp); + show_regs(fp); + dump_bfin_trace_buffer(); + } +#endif + panic("Double Fault - unrecoverable event"); + +} + +static int kernel_mode_regs(struct pt_regs *regs) +{ + return regs->ipend & 0xffc0; +} asmlinkage void trap_c(struct pt_regs *fp) { - int j, sig = 0; +#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON + int j; +#endif +#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO + unsigned int cpu = smp_processor_id(); +#endif + const char *strerror = NULL; + int sig = 0; siginfo_t info; unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE; -#ifdef CONFIG_KGDB -# define CHK_DEBUGGER_TRAP() \ - do { \ - CHK_DEBUGGER(trapnr, sig, info.si_code, fp); \ - } while (0) -# define CHK_DEBUGGER_TRAP_MAYBE() \ - do { \ - if (kgdb_connected) \ - CHK_DEBUGGER_TRAP(); \ - } while (0) -#else -# define CHK_DEBUGGER_TRAP() do { } while (0) -# define CHK_DEBUGGER_TRAP_MAYBE() do { } while (0) + trace_buffer_save(j); +#if defined(CONFIG_DEBUG_MMRS) || defined(CONFIG_DEBUG_MMRS_MODULE) + last_seqstat = (u32)fp->seqstat; #endif - trace_buffer_save(j); + /* Important - be very careful dereferncing pointers - will lead to + * double faults if the stack has become corrupt + */ /* trap_c() will be called for exceptions. During exceptions * processing, the pc value should be set with retx value. @@ -190,55 +305,62 @@ asmlinkage void trap_c(struct pt_regs *fp) sig = SIGTRAP; CHK_DEBUGGER_TRAP_MAYBE(); /* Check if this is a breakpoint in kernel space */ - if (fp->ipend & 0xffc0) - return; + if (kernel_mode_regs(fp)) + goto traps_done; else break; + /* 0x03 - User Defined, userspace stack overflow */ + case VEC_EXCPT03: + info.si_code = SEGV_STACKFLOW; + sig = SIGSEGV; + strerror = KERN_NOTICE EXC_0x03(KERN_NOTICE); + CHK_DEBUGGER_TRAP_MAYBE(); + break; + /* 0x02 - KGDB initial connection and break signal trap */ + case VEC_EXCPT02: #ifdef CONFIG_KGDB - case VEC_EXCPT02 : /* gdb connection */ info.si_code = TRAP_ILLTRAP; sig = SIGTRAP; CHK_DEBUGGER_TRAP(); - return; -#else - /* 0x02 - User Defined, Caught by default */ + goto traps_done; #endif - /* 0x03 - Atomic test and set */ - case VEC_EXCPT03: - info.si_code = SEGV_STACKFLOW; - sig = SIGSEGV; - printk(KERN_EMERG EXC_0x03); - CHK_DEBUGGER_TRAP(); + /* 0x04 - User Defined */ + /* 0x05 - User Defined */ + /* 0x06 - User Defined */ + /* 0x07 - User Defined */ + /* 0x08 - User Defined */ + /* 0x09 - User Defined */ + /* 0x0A - User Defined */ + /* 0x0B - User Defined */ + /* 0x0C - User Defined */ + /* 0x0D - User Defined */ + /* 0x0E - User Defined */ + /* 0x0F - User Defined */ + /* If we got here, it is most likely that someone was trying to use a + * custom exception handler, and it is not actually installed properly + */ + case VEC_EXCPT04 ... VEC_EXCPT15: + info.si_code = ILL_ILLPARAOP; + sig = SIGILL; + strerror = KERN_NOTICE EXC_0x04(KERN_NOTICE); + CHK_DEBUGGER_TRAP_MAYBE(); break; - /* 0x04 - spinlock - handled by _ex_spinlock, - getting here is an error */ - /* 0x05 - User Defined, Caught by default */ - /* 0x06 - User Defined, Caught by default */ - /* 0x07 - User Defined, Caught by default */ - /* 0x08 - User Defined, Caught by default */ - /* 0x09 - User Defined, Caught by default */ - /* 0x0A - User Defined, Caught by default */ - /* 0x0B - User Defined, Caught by default */ - /* 0x0C - User Defined, Caught by default */ - /* 0x0D - User Defined, Caught by default */ - /* 0x0E - User Defined, Caught by default */ - /* 0x0F - User Defined, Caught by default */ /* 0x10 HW Single step, handled here */ case VEC_STEP: info.si_code = TRAP_STEP; sig = SIGTRAP; CHK_DEBUGGER_TRAP_MAYBE(); /* Check if this is a single step in kernel space */ - if (fp->ipend & 0xffc0) - return; + if (kernel_mode_regs(fp)) + goto traps_done; else break; /* 0x11 - Trace Buffer Full, handled here */ case VEC_OVFLOW: info.si_code = TRAP_TRACEFLOW; sig = SIGTRAP; - printk(KERN_EMERG EXC_0x11); - CHK_DEBUGGER_TRAP(); + strerror = KERN_NOTICE EXC_0x11(KERN_NOTICE); + CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x12 - Reserved, Caught by default */ /* 0x13 - Reserved, Caught by default */ @@ -257,70 +379,84 @@ asmlinkage void trap_c(struct pt_regs *fp) /* 0x20 - Reserved, Caught by default */ /* 0x21 - Undefined Instruction, handled here */ case VEC_UNDEF_I: +#ifdef CONFIG_BUG + if (kernel_mode_regs(fp)) { + switch (report_bug(fp->pc, fp)) { + case BUG_TRAP_TYPE_NONE: + break; + case BUG_TRAP_TYPE_WARN: + dump_bfin_trace_buffer(); + fp->pc += 2; + goto traps_done; + case BUG_TRAP_TYPE_BUG: + /* call to panic() will dump trace, and it is + * off at this point, so it won't be clobbered + */ + panic("BUG()"); + } + } +#endif info.si_code = ILL_ILLOPC; sig = SIGILL; - printk(KERN_EMERG EXC_0x21); - CHK_DEBUGGER_TRAP(); + strerror = KERN_NOTICE EXC_0x21(KERN_NOTICE); + CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x22 - Illegal Instruction Combination, handled here */ case VEC_ILGAL_I: info.si_code = ILL_ILLPARAOP; sig = SIGILL; - printk(KERN_EMERG EXC_0x22); - CHK_DEBUGGER_TRAP(); + strerror = KERN_NOTICE EXC_0x22(KERN_NOTICE); + CHK_DEBUGGER_TRAP_MAYBE(); break; - /* 0x23 - Data CPLB Protection Violation, - normal case is handled in _cplb_hdr */ + /* 0x23 - Data CPLB protection violation, handled here */ case VEC_CPLB_VL: info.si_code = ILL_CPLB_VI; - sig = SIGILL; - printk(KERN_EMERG EXC_0x23); - CHK_DEBUGGER_TRAP(); + sig = SIGBUS; + strerror = KERN_NOTICE EXC_0x23(KERN_NOTICE); + CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x24 - Data access misaligned, handled here */ case VEC_MISALI_D: info.si_code = BUS_ADRALN; sig = SIGBUS; - printk(KERN_EMERG EXC_0x24); - CHK_DEBUGGER_TRAP(); + strerror = KERN_NOTICE EXC_0x24(KERN_NOTICE); + CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x25 - Unrecoverable Event, handled here */ case VEC_UNCOV: info.si_code = ILL_ILLEXCPT; sig = SIGILL; - printk(KERN_EMERG EXC_0x25); - CHK_DEBUGGER_TRAP(); + strerror = KERN_NOTICE EXC_0x25(KERN_NOTICE); + CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x26 - Data CPLB Miss, normal case is handled in _cplb_hdr, error case is handled here */ case VEC_CPLB_M: info.si_code = BUS_ADRALN; sig = SIGBUS; - printk(KERN_EMERG EXC_0x26); - CHK_DEBUGGER_TRAP(); + strerror = KERN_NOTICE EXC_0x26(KERN_NOTICE); break; /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero, handled here */ case VEC_CPLB_MHIT: info.si_code = ILL_CPLB_MULHIT; -#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO sig = SIGSEGV; - printk(KERN_EMERG "\n" - KERN_EMERG "NULL pointer access (probably)\n"); -#else - sig = SIGILL; - printk(KERN_EMERG EXC_0x27); +#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO + if (cpu_pda[cpu].dcplb_fault_addr < FIXED_CODE_START) + strerror = KERN_NOTICE "NULL pointer access\n"; + else #endif - CHK_DEBUGGER_TRAP(); + strerror = KERN_NOTICE EXC_0x27(KERN_NOTICE); + CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x28 - Emulation Watchpoint, handled here */ case VEC_WATCH: info.si_code = TRAP_WATCHPT; sig = SIGTRAP; - pr_debug(EXC_0x28); + pr_debug(EXC_0x28(KERN_DEBUG)); CHK_DEBUGGER_TRAP_MAYBE(); /* Check if this is a watchpoint in kernel space */ - if (fp->ipend & 0xffc0) - return; + if (kernel_mode_regs(fp)) + goto traps_done; else break; #ifdef CONFIG_BF535 @@ -328,8 +464,8 @@ asmlinkage void trap_c(struct pt_regs *fp) case VEC_ISTRU_VL: /* ADSP-BF535 only (MH) */ info.si_code = BUS_OPFETCH; sig = SIGBUS; - printk(KERN_EMERG "BF535: VEC_ISTRU_VL\n"); - CHK_DEBUGGER_TRAP(); + strerror = KERN_NOTICE "BF535: VEC_ISTRU_VL\n"; + CHK_DEBUGGER_TRAP_MAYBE(); break; #else /* 0x29 - Reserved, Caught by default */ @@ -338,42 +474,40 @@ asmlinkage void trap_c(struct pt_regs *fp) case VEC_MISALI_I: info.si_code = BUS_ADRALN; sig = SIGBUS; - printk(KERN_EMERG EXC_0x2A); - CHK_DEBUGGER_TRAP(); + strerror = KERN_NOTICE EXC_0x2A(KERN_NOTICE); + CHK_DEBUGGER_TRAP_MAYBE(); break; - /* 0x2B - Instruction CPLB protection Violation, - handled in _cplb_hdr */ + /* 0x2B - Instruction CPLB protection violation, handled here */ case VEC_CPLB_I_VL: info.si_code = ILL_CPLB_VI; - sig = SIGILL; - printk(KERN_EMERG EXC_0x2B); - CHK_DEBUGGER_TRAP(); + sig = SIGBUS; + strerror = KERN_NOTICE EXC_0x2B(KERN_NOTICE); + CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x2C - Instruction CPLB miss, handled in _cplb_hdr */ case VEC_CPLB_I_M: info.si_code = ILL_CPLB_MISS; sig = SIGBUS; - printk(KERN_EMERG EXC_0x2C); - CHK_DEBUGGER_TRAP(); + strerror = KERN_NOTICE EXC_0x2C(KERN_NOTICE); break; /* 0x2D - Instruction CPLB Multiple Hits, handled here */ case VEC_CPLB_I_MHIT: info.si_code = ILL_CPLB_MULHIT; -#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO sig = SIGSEGV; - printk(KERN_EMERG "\n\nJump to address 0 - 0x0fff\n"); -#else - sig = SIGILL; - printk(KERN_EMERG EXC_0x2D); +#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO + if (cpu_pda[cpu].icplb_fault_addr < FIXED_CODE_START) + strerror = KERN_NOTICE "Jump to NULL address\n"; + else #endif - CHK_DEBUGGER_TRAP(); + strerror = KERN_NOTICE EXC_0x2D(KERN_NOTICE); + CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x2E - Illegal use of Supervisor Resource, handled here */ case VEC_ILL_RES: info.si_code = ILL_PRVOPC; sig = SIGILL; - printk(KERN_EMERG EXC_0x2E); - CHK_DEBUGGER_TRAP(); + strerror = KERN_NOTICE EXC_0x2E(KERN_NOTICE); + CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x2F - Reserved, Caught by default */ /* 0x30 - Reserved, Caught by default */ @@ -392,280 +526,770 @@ asmlinkage void trap_c(struct pt_regs *fp) /* 0x3D - Reserved, Caught by default */ /* 0x3E - Reserved, Caught by default */ /* 0x3F - Reserved, Caught by default */ + case VEC_HWERR: + info.si_code = BUS_ADRALN; + sig = SIGBUS; + switch (fp->seqstat & SEQSTAT_HWERRCAUSE) { + /* System MMR Error */ + case (SEQSTAT_HWERRCAUSE_SYSTEM_MMR): + info.si_code = BUS_ADRALN; + sig = SIGBUS; + strerror = KERN_NOTICE HWC_x2(KERN_NOTICE); + break; + /* External Memory Addressing Error */ + case (SEQSTAT_HWERRCAUSE_EXTERN_ADDR): + info.si_code = BUS_ADRERR; + sig = SIGBUS; + strerror = KERN_NOTICE HWC_x3(KERN_NOTICE); + break; + /* Performance Monitor Overflow */ + case (SEQSTAT_HWERRCAUSE_PERF_FLOW): + strerror = KERN_NOTICE HWC_x12(KERN_NOTICE); + break; + /* RAISE 5 instruction */ + case (SEQSTAT_HWERRCAUSE_RAISE_5): + printk(KERN_NOTICE HWC_x18(KERN_NOTICE)); + break; + default: /* Reserved */ + printk(KERN_NOTICE HWC_default(KERN_NOTICE)); + break; + } + CHK_DEBUGGER_TRAP_MAYBE(); + break; + /* + * We should be handling all known exception types above, + * if we get here we hit a reserved one, so panic + */ default: - info.si_code = TRAP_ILLTRAP; - sig = SIGTRAP; - printk(KERN_EMERG "Caught Unhandled Exception, code = %08lx\n", + info.si_code = ILL_ILLPARAOP; + sig = SIGILL; + verbose_printk(KERN_EMERG "Caught Unhandled Exception, code = %08lx\n", (fp->seqstat & SEQSTAT_EXCAUSE)); - CHK_DEBUGGER_TRAP(); + CHK_DEBUGGER_TRAP_MAYBE(); break; } - info.si_signo = sig; - info.si_errno = 0; - info.si_addr = (void *)fp->pc; - force_sig_info(sig, &info, current); - if (sig != 0 && sig != SIGTRAP) { - unsigned long stack; - dump_bfin_regs(fp, (void *)fp->retx); - dump_bfin_trace_buffer(); - show_stack(current, &stack); - if (current->mm == NULL) - panic("Kernel exception"); - } + BUG_ON(sig == 0); - /* if the address that we are about to return to is not valid, set it - * to a valid address, if we have a current application or panic + /* If the fault was caused by a kernel thread, or interrupt handler + * we will kernel panic, so the system reboots. */ - if (!(fp->pc <= physical_mem_end -#if L1_CODE_LENGTH != 0 - || (fp->pc >= L1_CODE_START && - fp->pc <= (L1_CODE_START + L1_CODE_LENGTH)) -#endif - )) { - if (current->mm) { - fp->pc = current->mm->start_code; + if (kernel_mode_regs(fp) || (current && !current->mm)) { + console_verbose(); + oops_in_progress = 1; + } + + if (sig != SIGTRAP) { + if (strerror) + verbose_printk(strerror); + + dump_bfin_process(fp); + dump_bfin_mem(fp); + show_regs(fp); + + /* Print out the trace buffer if it makes sense */ +#ifndef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE + if (trapnr == VEC_CPLB_I_M || trapnr == VEC_CPLB_M) + verbose_printk(KERN_NOTICE "No trace since you do not have " + "CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE enabled\n\n"); + else +#endif + dump_bfin_trace_buffer(); + + if (oops_in_progress) { + /* Dump the current kernel stack */ + verbose_printk(KERN_NOTICE "Kernel Stack\n"); + show_stack(current, NULL); + print_modules(); +#ifndef CONFIG_ACCESS_CHECK + verbose_printk(KERN_EMERG "Please turn on " + "CONFIG_ACCESS_CHECK\n"); +#endif + panic("Kernel exception"); } else { - printk(KERN_EMERG - "I can't return to memory that doesn't exist" - " - bad things happen\n"); - panic("Help - I've fallen and can't get up\n"); +#ifdef CONFIG_DEBUG_VERBOSE + unsigned long *stack; + /* Dump the user space stack */ + stack = (unsigned long *)rdusp(); + verbose_printk(KERN_NOTICE "Userspace Stack\n"); + show_stack(NULL, stack); +#endif } } +#ifdef CONFIG_IPIPE + if (!ipipe_trap_notify(fp->seqstat & 0x3f, fp)) +#endif + { + info.si_signo = sig; + info.si_errno = 0; + info.si_addr = (void __user *)fp->pc; + force_sig_info(sig, &info, current); + } + + if ((ANOMALY_05000461 && trapnr == VEC_HWERR && !access_ok(VERIFY_READ, fp->pc, 8)) || + (ANOMALY_05000281 && trapnr == VEC_HWERR) || + (ANOMALY_05000189 && (trapnr == VEC_CPLB_I_VL || trapnr == VEC_CPLB_VL))) + fp->pc = SAFE_USER_INSTRUCTION; + + traps_done: trace_buffer_restore(j); - return; } /* Typical exception handling routines */ +#define EXPAND_LEN ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN) * 256 - 1) + +/* + * Similar to get_user, do some address checking, then dereference + * Return true on sucess, false on bad address + */ +static bool get_instruction(unsigned short *val, unsigned short *address) +{ + unsigned long addr = (unsigned long)address; + + /* Check for odd addresses */ + if (addr & 0x1) + return false; + + /* MMR region will never have instructions */ + if (addr >= SYSMMR_BASE) + return false; + + switch (bfin_mem_access_type(addr, 2)) { + case BFIN_MEM_ACCESS_CORE: + case BFIN_MEM_ACCESS_CORE_ONLY: + *val = *address; + return true; + case BFIN_MEM_ACCESS_DMA: + dma_memcpy(val, address, 2); + return true; + case BFIN_MEM_ACCESS_ITEST: + isram_memcpy(val, address, 2); + return true; + default: /* invalid access */ + return false; + } +} + +/* + * decode the instruction if we are printing out the trace, as it + * makes things easier to follow, without running it through objdump + * These are the normal instructions which cause change of flow, which + * would be at the source of the trace buffer + */ +#if defined(CONFIG_DEBUG_VERBOSE) && defined(CONFIG_DEBUG_BFIN_HWTRACE_ON) +static void decode_instruction(unsigned short *address) +{ + unsigned short opcode; + + if (get_instruction(&opcode, address)) { + if (opcode == 0x0010) + verbose_printk("RTS"); + else if (opcode == 0x0011) + verbose_printk("RTI"); + else if (opcode == 0x0012) + verbose_printk("RTX"); + else if (opcode == 0x0013) + verbose_printk("RTN"); + else if (opcode == 0x0014) + verbose_printk("RTE"); + else if (opcode == 0x0025) + verbose_printk("EMUEXCPT"); + else if (opcode == 0x0040 && opcode <= 0x0047) + verbose_printk("STI R%i", opcode & 7); + else if (opcode >= 0x0050 && opcode <= 0x0057) + verbose_printk("JUMP (P%i)", opcode & 7); + else if (opcode >= 0x0060 && opcode <= 0x0067) + verbose_printk("CALL (P%i)", opcode & 7); + else if (opcode >= 0x0070 && opcode <= 0x0077) + verbose_printk("CALL (PC+P%i)", opcode & 7); + else if (opcode >= 0x0080 && opcode <= 0x0087) + verbose_printk("JUMP (PC+P%i)", opcode & 7); + else if (opcode >= 0x0090 && opcode <= 0x009F) + verbose_printk("RAISE 0x%x", opcode & 0xF); + else if (opcode >= 0x00A0 && opcode <= 0x00AF) + verbose_printk("EXCPT 0x%x", opcode & 0xF); + else if ((opcode >= 0x1000 && opcode <= 0x13FF) || (opcode >= 0x1800 && opcode <= 0x1BFF)) + verbose_printk("IF !CC JUMP"); + else if ((opcode >= 0x1400 && opcode <= 0x17ff) || (opcode >= 0x1c00 && opcode <= 0x1fff)) + verbose_printk("IF CC JUMP"); + else if (opcode >= 0x2000 && opcode <= 0x2fff) + verbose_printk("JUMP.S"); + else if (opcode >= 0xe080 && opcode <= 0xe0ff) + verbose_printk("LSETUP"); + else if (opcode >= 0xe200 && opcode <= 0xe2ff) + verbose_printk("JUMP.L"); + else if (opcode >= 0xe300 && opcode <= 0xe3ff) + verbose_printk("CALL pcrel"); + else + verbose_printk("0x%04x", opcode); + } + +} +#endif + void dump_bfin_trace_buffer(void) { - int tflags; +#ifdef CONFIG_DEBUG_VERBOSE +#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON + int tflags, i = 0; + char buf[150]; + unsigned short *addr; +#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND + int j, index; +#endif + trace_buffer_save(tflags); + printk(KERN_NOTICE "Hardware Trace:\n"); + +#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND + printk(KERN_NOTICE "WARNING: Expanded trace turned on - can not trace exceptions\n"); +#endif + if (likely(bfin_read_TBUFSTAT() & TBUFCNT)) { - int i; - printk(KERN_EMERG "Hardware Trace:\n"); - for (i = 0; bfin_read_TBUFSTAT() & TBUFCNT; i++) { - printk(KERN_EMERG "%2i Target : ", i); - printk_address((unsigned long)bfin_read_TBUF()); - printk("\n" KERN_EMERG " Source : "); - printk_address((unsigned long)bfin_read_TBUF()); + for (; bfin_read_TBUFSTAT() & TBUFCNT; i++) { + decode_address(buf, (unsigned long)bfin_read_TBUF()); + printk(KERN_NOTICE "%4i Target : %s\n", i, buf); + addr = (unsigned short *)bfin_read_TBUF(); + decode_address(buf, (unsigned long)addr); + printk(KERN_NOTICE " Source : %s ", buf); + decode_instruction(addr); printk("\n"); } } +#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND + if (trace_buff_offset) + index = trace_buff_offset / 4; + else + index = EXPAND_LEN; + + j = (1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN) * 128; + while (j) { + decode_address(buf, software_trace_buff[index]); + printk(KERN_NOTICE "%4i Target : %s\n", i, buf); + index -= 1; + if (index < 0 ) + index = EXPAND_LEN; + decode_address(buf, software_trace_buff[index]); + printk(KERN_NOTICE " Source : %s ", buf); + decode_instruction((unsigned short *)software_trace_buff[index]); + printk("\n"); + index -= 1; + if (index < 0) + index = EXPAND_LEN; + j--; + i++; + } +#endif + trace_buffer_restore(tflags); +#endif +#endif } EXPORT_SYMBOL(dump_bfin_trace_buffer); -static void show_trace(struct task_struct *tsk, unsigned long *sp) +#ifdef CONFIG_BUG +int is_valid_bugaddr(unsigned long addr) { - unsigned long addr; + unsigned short opcode; - printk("\nCall Trace:"); -#ifdef CONFIG_KALLSYMS - printk("\n"); -#endif - - while (!kstack_end(sp)) { - addr = *sp++; - /* - * If the address is either in the text segment of the - * kernel, or in the region which contains vmalloc'ed - * memory, it *may* be the address of a calling - * routine; if so, print it so that someone tracing - * down the cause of the crash will be able to figure - * out the call path that was taken. - */ - if (kernel_text_address(addr)) - print_ip_sym(addr); - } + if (!get_instruction(&opcode, (unsigned short *)addr)) + return 0; + + return opcode == BFIN_BUG_OPCODE; +} +#endif + +/* + * Checks to see if the address pointed to is either a + * 16-bit CALL instruction, or a 32-bit CALL instruction + */ +static bool is_bfin_call(unsigned short *addr) +{ + unsigned short opcode = 0, *ins_addr; + ins_addr = (unsigned short *)addr; + + if (!get_instruction(&opcode, ins_addr)) + return false; + + if ((opcode >= 0x0060 && opcode <= 0x0067) || + (opcode >= 0x0070 && opcode <= 0x0077)) + return true; + + ins_addr--; + if (!get_instruction(&opcode, ins_addr)) + return false; + + if (opcode >= 0xE300 && opcode <= 0xE3FF) + return true; + + return false; - printk("\n"); } void show_stack(struct task_struct *task, unsigned long *stack) { - unsigned long *endstack, addr; - int i; +#ifdef CONFIG_PRINTK + unsigned int *addr, *endstack, *fp = 0, *frame; + unsigned short *ins_addr; + char buf[150]; + unsigned int i, j, ret_addr, frame_no = 0; - /* Cannot call dump_bfin_trace_buffer() here as show_stack() is - * called externally in some places in the kernel. + /* + * If we have been passed a specific stack, use that one otherwise + * if we have been passed a task structure, use that, otherwise + * use the stack of where the variable "stack" exists */ - if (!stack) { - if (task) + if (stack == NULL) { + if (task) { + /* We know this is a kernel stack, so this is the start/end */ stack = (unsigned long *)task->thread.ksp; - else + endstack = (unsigned int *)(((unsigned int)(stack) & ~(THREAD_SIZE - 1)) + THREAD_SIZE); + } else { + /* print out the existing stack info */ stack = (unsigned long *)&stack; + endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack); + } + } else + endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack); + + printk(KERN_NOTICE "Stack info:\n"); + decode_address(buf, (unsigned int)stack); + printk(KERN_NOTICE " SP: [0x%p] %s\n", stack, buf); + + if (!access_ok(VERIFY_READ, stack, (unsigned int)endstack - (unsigned int)stack)) { + printk(KERN_NOTICE "Invalid stack pointer\n"); + return; } - addr = (unsigned long)stack; - endstack = (unsigned long *)PAGE_ALIGN(addr); + /* First thing is to look for a frame pointer */ + for (addr = (unsigned int *)((unsigned int)stack & ~0xF); addr < endstack; addr++) { + if (*addr & 0x1) + continue; + ins_addr = (unsigned short *)*addr; + ins_addr--; + if (is_bfin_call(ins_addr)) + fp = addr - 1; - printk(KERN_EMERG "Stack from %08lx:", (unsigned long)stack); - for (i = 0; i < kstack_depth_to_print; i++) { - if (stack + 1 > endstack) - break; - if (i % 8 == 0) - printk("\n" KERN_EMERG " "); - printk(" %08lx", *stack++); + if (fp) { + /* Let's check to see if it is a frame pointer */ + while (fp >= (addr - 1) && fp < endstack + && fp && ((unsigned int) fp & 0x3) == 0) + fp = (unsigned int *)*fp; + if (fp == 0 || fp == endstack) { + fp = addr - 1; + break; + } + fp = 0; + } } + if (fp) { + frame = fp; + printk(KERN_NOTICE " FP: (0x%p)\n", fp); + } else + frame = 0; + + /* + * Now that we think we know where things are, we + * walk the stack again, this time printing things out + * incase there is no frame pointer, we still look for + * valid return addresses + */ + + /* First time print out data, next time, print out symbols */ + for (j = 0; j <= 1; j++) { + if (j) + printk(KERN_NOTICE "Return addresses in stack:\n"); + else + printk(KERN_NOTICE " Memory from 0x%08lx to %p", ((long unsigned int)stack & ~0xF), endstack); + + fp = frame; + frame_no = 0; + + for (addr = (unsigned int *)((unsigned int)stack & ~0xF), i = 0; + addr < endstack; addr++, i++) { + + ret_addr = 0; + if (!j && i % 8 == 0) + printk(KERN_NOTICE "%p:",addr); + + /* if it is an odd address, or zero, just skip it */ + if (*addr & 0x1 || !*addr) + goto print; + + ins_addr = (unsigned short *)*addr; + + /* Go back one instruction, and see if it is a CALL */ + ins_addr--; + ret_addr = is_bfin_call(ins_addr); + print: + if (!j && stack == (unsigned long *)addr) + printk("[%08x]", *addr); + else if (ret_addr) + if (j) { + decode_address(buf, (unsigned int)*addr); + if (frame == addr) { + printk(KERN_NOTICE " frame %2i : %s\n", frame_no, buf); + continue; + } + printk(KERN_NOTICE " address : %s\n", buf); + } else + printk("<%08x>", *addr); + else if (fp == addr) { + if (j) + frame = addr+1; + else + printk("(%08x)", *addr); + + fp = (unsigned int *)*addr; + frame_no++; - show_trace(task, stack); + } else if (!j) + printk(" %08x ", *addr); + } + if (!j) + printk("\n"); + } +#endif } +EXPORT_SYMBOL(show_stack); void dump_stack(void) { unsigned long stack; +#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON int tflags; +#endif trace_buffer_save(tflags); dump_bfin_trace_buffer(); show_stack(current, &stack); trace_buffer_restore(tflags); } - EXPORT_SYMBOL(dump_stack); -void dump_bfin_regs(struct pt_regs *fp, void *retaddr) +void dump_bfin_process(struct pt_regs *fp) { - if (current->pid) { - printk(KERN_EMERG "\n" KERN_EMERG "CURRENT PROCESS:\n" - KERN_EMERG "\n"); - printk(KERN_EMERG "COMM=%s PID=%d\n", - current->comm, current->pid); - } else { - printk - (KERN_EMERG "\n" KERN_EMERG - "No Valid pid - Either things are really messed up," - " or you are in the kernel\n"); - } +#ifdef CONFIG_DEBUG_VERBOSE + /* We should be able to look at fp->ipend, but we don't push it on the + * stack all the time, so do this until we fix that */ + unsigned int context = bfin_read_IPEND(); + + if (oops_in_progress) + verbose_printk(KERN_EMERG "Kernel OOPS in progress\n"); + + if (context & 0x0020 && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR) + verbose_printk(KERN_NOTICE "HW Error context\n"); + else if (context & 0x0020) + verbose_printk(KERN_NOTICE "Deferred Exception context\n"); + else if (context & 0x3FC0) + verbose_printk(KERN_NOTICE "Interrupt context\n"); + else if (context & 0x4000) + verbose_printk(KERN_NOTICE "Deferred Interrupt context\n"); + else if (context & 0x8000) + verbose_printk(KERN_NOTICE "Kernel process context\n"); + + /* Because we are crashing, and pointers could be bad, we check things + * pretty closely before we use them + */ + if ((unsigned long)current >= FIXED_CODE_START && + !((unsigned long)current & 0x3) && current->pid) { + verbose_printk(KERN_NOTICE "CURRENT PROCESS:\n"); + if (current->comm >= (char *)FIXED_CODE_START) + verbose_printk(KERN_NOTICE "COMM=%s PID=%d\n", + current->comm, current->pid); + else + verbose_printk(KERN_NOTICE "COMM= invalid\n"); + + printk(KERN_NOTICE "CPU = %d\n", current_thread_info()->cpu); + if (!((unsigned long)current->mm & 0x3) && (unsigned long)current->mm >= FIXED_CODE_START) + verbose_printk(KERN_NOTICE + "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n" + " BSS = 0x%p-0x%p USER-STACK = 0x%p\n\n", + (void *)current->mm->start_code, + (void *)current->mm->end_code, + (void *)current->mm->start_data, + (void *)current->mm->end_data, + (void *)current->mm->end_data, + (void *)current->mm->brk, + (void *)current->mm->start_stack); + else + verbose_printk(KERN_NOTICE "invalid mm\n"); + } else + verbose_printk(KERN_NOTICE + "No Valid process in current context\n"); +#endif +} + +void dump_bfin_mem(struct pt_regs *fp) +{ +#ifdef CONFIG_DEBUG_VERBOSE + unsigned short *addr, *erraddr, val = 0, err = 0; + char sti = 0, buf[6]; + + erraddr = (void *)fp->pc; - if (current->mm) { - printk(KERN_EMERG "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n" - KERN_EMERG "BSS = 0x%p-0x%p USER-STACK = 0x%p\n" - KERN_EMERG "\n", - (void*)current->mm->start_code, - (void*)current->mm->end_code, - (void*)current->mm->start_data, - (void*)current->mm->end_data, - (void*)current->mm->end_data, - (void*)current->mm->brk, - (void*)current->mm->start_stack); + verbose_printk(KERN_NOTICE "return address: [0x%p]; contents of:", erraddr); + + for (addr = (unsigned short *)((unsigned long)erraddr & ~0xF) - 0x10; + addr < (unsigned short *)((unsigned long)erraddr & ~0xF) + 0x10; + addr++) { + if (!((unsigned long)addr & 0xF)) + verbose_printk(KERN_NOTICE "0x%p: ", addr); + + if (!get_instruction(&val, addr)) { + val = 0; + sprintf(buf, "????"); + } else + sprintf(buf, "%04x", val); + + if (addr == erraddr) { + verbose_printk("[%s]", buf); + err = val; + } else + verbose_printk(" %s ", buf); + + /* Do any previous instructions turn on interrupts? */ + if (addr <= erraddr && /* in the past */ + ((val >= 0x0040 && val <= 0x0047) || /* STI instruction */ + val == 0x017b)) /* [SP++] = RETI */ + sti = 1; } - printk(KERN_EMERG "return address: [0x%p]; contents of:", retaddr); - if (retaddr != 0 && retaddr <= (void*)physical_mem_end -#if L1_CODE_LENGTH != 0 - /* FIXME: Copy the code out of L1 Instruction SRAM through dma - memcpy. */ - && !(retaddr >= (void*)L1_CODE_START - && retaddr < (void*)(L1_CODE_START + L1_CODE_LENGTH)) -#endif - ) { - int i = ((unsigned int)retaddr & 0xFFFFFFF0) - 32; - unsigned short x = 0; - for (; i < ((unsigned int)retaddr & 0xFFFFFFF0 ) + 32 ; - i += 2) { - if ( !(i & 0xF) ) - printk(KERN_EMERG "\n" KERN_EMERG - "0x%08x: ", i); - - if (get_user(x, (unsigned short *)i)) - break; + verbose_printk("\n"); + + /* Hardware error interrupts can be deferred */ + if (unlikely(sti && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR && + oops_in_progress)){ + verbose_printk(KERN_NOTICE "Looks like this was a deferred error - sorry\n"); #ifndef CONFIG_DEBUG_HWERR - /* If one of the last few instructions was a STI - * it is likely that the error occured awhile ago - * and we just noticed - */ - if (x >= 0x0040 && x <= 0x0047 && i <= 0) - panic("\n\nWARNING : You should reconfigure" - " the kernel to turn on\n" - " 'Hardware error interrupt" - " debugging'\n" - " The rest of this error" - " is meanless\n"); -#endif - if ( i == (unsigned int)retaddr ) - printk("[%04x]", x); - else - printk(" %04x ", x); + verbose_printk(KERN_NOTICE +"The remaining message may be meaningless\n" +"You should enable CONFIG_DEBUG_HWERR to get a better idea where it came from\n"); +#else + /* If we are handling only one peripheral interrupt + * and current mm and pid are valid, and the last error + * was in that user space process's text area + * print it out - because that is where the problem exists + */ + if ((!(((fp)->ipend & ~0x30) & (((fp)->ipend & ~0x30) - 1))) && + (current->pid && current->mm)) { + /* And the last RETI points to the current userspace context */ + if ((fp + 1)->pc >= current->mm->start_code && + (fp + 1)->pc <= current->mm->end_code) { + verbose_printk(KERN_NOTICE "It might be better to look around here : \n"); + verbose_printk(KERN_NOTICE "-------------------------------------------\n"); + show_regs(fp + 1); + verbose_printk(KERN_NOTICE "-------------------------------------------\n"); + } } - printk("\n" KERN_EMERG "\n"); - } else - printk(KERN_EMERG - "Cannot look at the [PC] for it is" - "in unreadable L1 SRAM - sorry\n"); - - - printk(KERN_EMERG - "RETE: %08lx RETN: %08lx RETX: %08lx RETS: %08lx\n", - fp->rete, fp->retn, fp->retx, fp->rets); - printk(KERN_EMERG "IPEND: %04lx SYSCFG: %04lx\n", - fp->ipend, fp->syscfg); - printk(KERN_EMERG "SEQSTAT: %08lx SP: %08lx\n", - (long)fp->seqstat, (long)fp); - printk(KERN_EMERG "R0: %08lx R1: %08lx R2: %08lx R3: %08lx\n", +#endif + } +#endif +} + +void show_regs(struct pt_regs *fp) +{ +#ifdef CONFIG_DEBUG_VERBOSE + char buf [150]; + struct irqaction *action; + unsigned int i; + unsigned long flags = 0; + unsigned int cpu = smp_processor_id(); + unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic(); + + verbose_printk(KERN_NOTICE "\n"); + if (CPUID != bfin_cpuid()) + verbose_printk(KERN_NOTICE "Compiled for cpu family 0x%04x (Rev %d), " + "but running on:0x%04x (Rev %d)\n", + CPUID, bfin_compiled_revid(), bfin_cpuid(), bfin_revid()); + + verbose_printk(KERN_NOTICE "ADSP-%s-0.%d", + CPU, bfin_compiled_revid()); + + if (bfin_compiled_revid() != bfin_revid()) + verbose_printk("(Detected 0.%d)", bfin_revid()); + + verbose_printk(" %lu(MHz CCLK) %lu(MHz SCLK) (%s)\n", + get_cclk()/1000000, get_sclk()/1000000, +#ifdef CONFIG_MPU + "mpu on" +#else + "mpu off" +#endif + ); + + verbose_printk(KERN_NOTICE "%s", linux_banner); + + verbose_printk(KERN_NOTICE "\nSEQUENCER STATUS:\t\t%s\n", print_tainted()); + verbose_printk(KERN_NOTICE " SEQSTAT: %08lx IPEND: %04lx IMASK: %04lx SYSCFG: %04lx\n", + (long)fp->seqstat, fp->ipend, cpu_pda[smp_processor_id()].ex_imask, fp->syscfg); + if (fp->ipend & EVT_IRPTEN) + verbose_printk(KERN_NOTICE " Global Interrupts Disabled (IPEND[4])\n"); + if (!(cpu_pda[smp_processor_id()].ex_imask & (EVT_IVG13 | EVT_IVG12 | EVT_IVG11 | + EVT_IVG10 | EVT_IVG9 | EVT_IVG8 | EVT_IVG7 | EVT_IVTMR))) + verbose_printk(KERN_NOTICE " Peripheral interrupts masked off\n"); + if (!(cpu_pda[smp_processor_id()].ex_imask & (EVT_IVG15 | EVT_IVG14))) + verbose_printk(KERN_NOTICE " Kernel interrupts masked off\n"); + if ((fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR) { + verbose_printk(KERN_NOTICE " HWERRCAUSE: 0x%lx\n", + (fp->seqstat & SEQSTAT_HWERRCAUSE) >> 14); +#ifdef EBIU_ERRMST + /* If the error was from the EBIU, print it out */ + if (bfin_read_EBIU_ERRMST() & CORE_ERROR) { + verbose_printk(KERN_NOTICE " EBIU Error Reason : 0x%04x\n", + bfin_read_EBIU_ERRMST()); + verbose_printk(KERN_NOTICE " EBIU Error Address : 0x%08x\n", + bfin_read_EBIU_ERRADD()); + } +#endif + } + verbose_printk(KERN_NOTICE " EXCAUSE : 0x%lx\n", + fp->seqstat & SEQSTAT_EXCAUSE); + for (i = 2; i <= 15 ; i++) { + if (fp->ipend & (1 << i)) { + if (i != 4) { + decode_address(buf, bfin_read32(EVT0 + 4*i)); + verbose_printk(KERN_NOTICE " physical IVG%i asserted : %s\n", i, buf); + } else + verbose_printk(KERN_NOTICE " interrupts disabled\n"); + } + } + + /* if no interrupts are going off, don't print this out */ + if (fp->ipend & ~0x3F) { + for (i = 0; i < (NR_IRQS - 1); i++) { + if (!in_atomic) + spin_lock_irqsave(&irq_desc[i].lock, flags); + + action = irq_desc[i].action; + if (!action) + goto unlock; + + decode_address(buf, (unsigned int)action->handler); + verbose_printk(KERN_NOTICE " logical irq %3d mapped : %s", i, buf); + for (action = action->next; action; action = action->next) { + decode_address(buf, (unsigned int)action->handler); + verbose_printk(", %s", buf); + } + verbose_printk("\n"); +unlock: + if (!in_atomic) + spin_unlock_irqrestore(&irq_desc[i].lock, flags); + } + } + + decode_address(buf, fp->rete); + verbose_printk(KERN_NOTICE " RETE: %s\n", buf); + decode_address(buf, fp->retn); + verbose_printk(KERN_NOTICE " RETN: %s\n", buf); + decode_address(buf, fp->retx); + verbose_printk(KERN_NOTICE " RETX: %s\n", buf); + decode_address(buf, fp->rets); + verbose_printk(KERN_NOTICE " RETS: %s\n", buf); + decode_address(buf, fp->pc); + verbose_printk(KERN_NOTICE " PC : %s\n", buf); + + if (((long)fp->seqstat & SEQSTAT_EXCAUSE) && + (((long)fp->seqstat & SEQSTAT_EXCAUSE) != VEC_HWERR)) { + decode_address(buf, cpu_pda[cpu].dcplb_fault_addr); + verbose_printk(KERN_NOTICE "DCPLB_FAULT_ADDR: %s\n", buf); + decode_address(buf, cpu_pda[cpu].icplb_fault_addr); + verbose_printk(KERN_NOTICE "ICPLB_FAULT_ADDR: %s\n", buf); + } + + verbose_printk(KERN_NOTICE "PROCESSOR STATE:\n"); + verbose_printk(KERN_NOTICE " R0 : %08lx R1 : %08lx R2 : %08lx R3 : %08lx\n", fp->r0, fp->r1, fp->r2, fp->r3); - printk(KERN_EMERG "R4: %08lx R5: %08lx R6: %08lx R7: %08lx\n", + verbose_printk(KERN_NOTICE " R4 : %08lx R5 : %08lx R6 : %08lx R7 : %08lx\n", fp->r4, fp->r5, fp->r6, fp->r7); - printk(KERN_EMERG "P0: %08lx P1: %08lx P2: %08lx P3: %08lx\n", + verbose_printk(KERN_NOTICE " P0 : %08lx P1 : %08lx P2 : %08lx P3 : %08lx\n", fp->p0, fp->p1, fp->p2, fp->p3); - printk(KERN_EMERG - "P4: %08lx P5: %08lx FP: %08lx\n", - fp->p4, fp->p5, fp->fp); - printk(KERN_EMERG - "A0.w: %08lx A0.x: %08lx A1.w: %08lx A1.x: %08lx\n", - fp->a0w, fp->a0x, fp->a1w, fp->a1x); - - printk(KERN_EMERG "LB0: %08lx LT0: %08lx LC0: %08lx\n", + verbose_printk(KERN_NOTICE " P4 : %08lx P5 : %08lx FP : %08lx SP : %08lx\n", + fp->p4, fp->p5, fp->fp, (long)fp); + verbose_printk(KERN_NOTICE " LB0: %08lx LT0: %08lx LC0: %08lx\n", fp->lb0, fp->lt0, fp->lc0); - printk(KERN_EMERG "LB1: %08lx LT1: %08lx LC1: %08lx\n", + verbose_printk(KERN_NOTICE " LB1: %08lx LT1: %08lx LC1: %08lx\n", fp->lb1, fp->lt1, fp->lc1); - printk(KERN_EMERG "B0: %08lx L0: %08lx M0: %08lx I0: %08lx\n", + verbose_printk(KERN_NOTICE " B0 : %08lx L0 : %08lx M0 : %08lx I0 : %08lx\n", fp->b0, fp->l0, fp->m0, fp->i0); - printk(KERN_EMERG "B1: %08lx L1: %08lx M1: %08lx I1: %08lx\n", + verbose_printk(KERN_NOTICE " B1 : %08lx L1 : %08lx M1 : %08lx I1 : %08lx\n", fp->b1, fp->l1, fp->m1, fp->i1); - printk(KERN_EMERG "B2: %08lx L2: %08lx M2: %08lx I2: %08lx\n", + verbose_printk(KERN_NOTICE " B2 : %08lx L2 : %08lx M2 : %08lx I2 : %08lx\n", fp->b2, fp->l2, fp->m2, fp->i2); - printk(KERN_EMERG "B3: %08lx L3: %08lx M3: %08lx I3: %08lx\n", + verbose_printk(KERN_NOTICE " B3 : %08lx L3 : %08lx M3 : %08lx I3 : %08lx\n", fp->b3, fp->l3, fp->m3, fp->i3); + verbose_printk(KERN_NOTICE "A0.w: %08lx A0.x: %08lx A1.w: %08lx A1.x: %08lx\n", + fp->a0w, fp->a0x, fp->a1w, fp->a1x); - printk(KERN_EMERG "\n" KERN_EMERG "USP: %08lx ASTAT: %08lx\n", + verbose_printk(KERN_NOTICE "USP : %08lx ASTAT: %08lx\n", rdusp(), fp->astat); - if ((long)fp->seqstat & SEQSTAT_EXCAUSE) { - printk(KERN_EMERG "DCPLB_FAULT_ADDR=%p\n", - (void *)bfin_read_DCPLB_FAULT_ADDR()); - printk(KERN_EMERG "ICPLB_FAULT_ADDR=%p\n", - (void *)bfin_read_ICPLB_FAULT_ADDR()); - } - printk("\n\n"); + verbose_printk(KERN_NOTICE "\n"); +#endif } #ifdef CONFIG_SYS_BFIN_SPINLOCK_L1 asmlinkage int sys_bfin_spinlock(int *spinlock)__attribute__((l1_text)); #endif -asmlinkage int sys_bfin_spinlock(int *spinlock) +static DEFINE_SPINLOCK(bfin_spinlock_lock); + +asmlinkage int sys_bfin_spinlock(int *p) { - int ret = 0; - int tmp = 0; + int ret, tmp = 0; - local_irq_disable(); - ret = get_user(tmp, spinlock); - if (ret == 0) { - if (tmp) + spin_lock(&bfin_spinlock_lock); /* This would also hold kernel preemption. */ + ret = get_user(tmp, p); + if (likely(ret == 0)) { + if (unlikely(tmp)) ret = 1; - tmp = 1; - put_user(tmp, spinlock); + else + put_user(1, p); } - local_irq_enable(); + spin_unlock(&bfin_spinlock_lock); return ret; } +int bfin_request_exception(unsigned int exception, void (*handler)(void)) +{ + void (*curr_handler)(void); + + if (exception > 0x3F) + return -EINVAL; + + curr_handler = ex_table[exception]; + + if (curr_handler != ex_replaceable) + return -EBUSY; + + ex_table[exception] = handler; + + return 0; +} +EXPORT_SYMBOL(bfin_request_exception); + +int bfin_free_exception(unsigned int exception, void (*handler)(void)) +{ + void (*curr_handler)(void); + + if (exception > 0x3F) + return -EINVAL; + + curr_handler = ex_table[exception]; + + if (curr_handler != handler) + return -EBUSY; + + ex_table[exception] = ex_replaceable; + + return 0; +} +EXPORT_SYMBOL(bfin_free_exception); + void panic_cplb_error(int cplb_panic, struct pt_regs *fp) { switch (cplb_panic) { @@ -681,9 +1305,11 @@ void panic_cplb_error(int cplb_panic, struct pt_regs *fp) break; } - printk(KERN_EMERG "DCPLB_FAULT_ADDR=%p\n", (void*)bfin_read_DCPLB_FAULT_ADDR()); - printk(KERN_EMERG "ICPLB_FAULT_ADDR=%p\n", (void*)bfin_read_ICPLB_FAULT_ADDR()); - dump_bfin_regs(fp, (void *)fp->retx); + oops_in_progress = 1; + + dump_bfin_process(fp); + dump_bfin_mem(fp); + show_regs(fp); dump_stack(); - panic("Unrecoverable event\n"); + panic("Unrecoverable event"); }