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" KERN_NOTICE "SEQUENCER STATUS:\t\t%s\n", print_tainted());
verbose_printk(KERN_NOTICE " SEQSTAT: %08lx IPEND: %04lx SYSCFG: %04lx\n",
(long)fp->seqstat, fp->ipend, fp->syscfg);
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
}
asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
{
struct pt_regs *old_regs;
struct irq_desc *desc = irq_desc + irq;
unsigned short pending, other_ints;
old_regs = set_irq_regs(regs);
/*
* Some hardware gives randomly wrong interrupts. Rather
* than crashing, do something sensible.
*/
if (irq >= NR_IRQS)
desc = &bad_irq_desc;
irq_enter();
generic_handle_irq(irq);
/* If we're the only interrupt running (ignoring IRQ15 which is for
syscalls), lower our priority to IRQ14 so that softirqs run at
that level. If there's another, lower-level interrupt, irq_exit
will defer softirqs to that. */
CSYNC();
pending = bfin_read_IPEND() & ~0x8000;
other_ints = pending & (pending - 1);
if (other_ints == 0)
lower_to_irq14();
irq_exit();
set_irq_regs(old_regs);
}
void show_regs(struct pt_regs *fp)
{
char buf[150];
struct irqaction *action;
unsigned int i;
unsigned long flags = 0;
unsigned int cpu = raw_smp_processor_id();
unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic();
pr_notice("\n");
if (CPUID != bfin_cpuid())
pr_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());
pr_notice("ADSP-%s-0.%d",
CPU, bfin_compiled_revid());
if (bfin_compiled_revid() != bfin_revid())
pr_cont("(Detected 0.%d)", bfin_revid());
pr_cont(" %lu(MHz CCLK) %lu(MHz SCLK) (%s)\n",
get_cclk()/1000000, get_sclk()/1000000,
#ifdef CONFIG_MPU
"mpu on"
#else
"mpu off"
#endif
);
if(board_rom_type())
pr_notice("%s", linux_banner_stockui);
else
pr_notice("%s", linux_banner);
pr_notice("\nSEQUENCER STATUS:\t\t%s\n", print_tainted());
pr_notice(" SEQSTAT: %08lx IPEND: %04lx IMASK: %04lx SYSCFG: %04lx\n",
(long)fp->seqstat, fp->ipend, cpu_pda[raw_smp_processor_id()].ex_imask, fp->syscfg);
if (fp->ipend & EVT_IRPTEN)
pr_notice(" Global Interrupts Disabled (IPEND[4])\n");
if (!(cpu_pda[raw_smp_processor_id()].ex_imask & (EVT_IVG13 | EVT_IVG12 | EVT_IVG11 |
EVT_IVG10 | EVT_IVG9 | EVT_IVG8 | EVT_IVG7 | EVT_IVTMR)))
pr_notice(" Peripheral interrupts masked off\n");
if (!(cpu_pda[raw_smp_processor_id()].ex_imask & (EVT_IVG15 | EVT_IVG14)))
pr_notice(" Kernel interrupts masked off\n");
if ((fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR) {
pr_notice(" HWERRCAUSE: 0x%lx\n",
(fp->seqstat & SEQSTAT_HWERRCAUSE) >> 14);
#ifdef EBIU_ERRMST
if (bfin_read_EBIU_ERRMST() & CORE_ERROR) {
pr_notice(" EBIU Error Reason : 0x%04x\n",
bfin_read_EBIU_ERRMST());
pr_notice(" EBIU Error Address : 0x%08x\n",
bfin_read_EBIU_ERRADD());
}
#endif
}
static int get_kernel(void)
{
int ipend, is_kernel;
ipend = bfin_read_IPEND();
/* test bit 15 */
is_kernel = ((ipend & 0x8000) != 0);
return is_kernel;
}
asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
{
struct pt_regs *old_regs;
struct irq_desc *desc = irq_desc + irq;
#ifndef CONFIG_IPIPE
unsigned short pending, other_ints;
#endif
old_regs = set_irq_regs(regs);
/*
* Some hardware gives randomly wrong interrupts. Rather
* than crashing, do something sensible.
*/
if (irq >= NR_IRQS)
desc = &bad_irq_desc;
irq_enter();
#ifdef CONFIG_DEBUG_STACKOVERFLOW
/* Debugging check for stack overflow: is there less than STACK_WARN free? */
{
long sp;
sp = __get_SP() & (THREAD_SIZE-1);
if (unlikely(sp < (sizeof(struct thread_info) + STACK_WARN))) {
dump_stack();
printk(KERN_EMERG "%s: possible stack overflow while handling irq %i "
" only %ld bytes free\n",
__func__, irq, sp - sizeof(struct thread_info));
}
}
#endif
generic_handle_irq(irq);
#ifndef CONFIG_IPIPE
/*
* If we're the only interrupt running (ignoring IRQ15 which
* is for syscalls), lower our priority to IRQ14 so that
* softirqs run at that level. If there's another,
* lower-level interrupt, irq_exit will defer softirqs to
* that. If the interrupt pipeline is enabled, we are already
* running at IRQ14 priority, so we don't need this code.
*/
CSYNC();
pending = bfin_read_IPEND() & ~0x8000;
other_ints = pending & (pending - 1);
if (other_ints == 0)
lower_to_irq14();
#endif /* !CONFIG_IPIPE */
irq_exit();
set_irq_regs(old_regs);
}
void dump_bfin_process(struct pt_regs *fp)
{
#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"
KERN_NOTICE " BSS = 0x%p-0x%p USER-STACK = 0x%p\n"
KERN_NOTICE "\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 "\n" KERN_NOTICE
"No Valid process in current context\n");
#endif
}
static void maybe_lower_to_irq14(void)
{
unsigned short pending, other_ints;
/*
* If we're the only interrupt running (ignoring IRQ15 which
* is for syscalls), lower our priority to IRQ14 so that
* softirqs run at that level. If there's another,
* lower-level interrupt, irq_exit will defer softirqs to
* that. If the interrupt pipeline is enabled, we are already
* running at IRQ14 priority, so we don't need this code.
*/
CSYNC();
pending = bfin_read_IPEND() & ~0x8000;
other_ints = pending & (pending - 1);
if (other_ints == 0)
lower_to_irq14();
}
void dump_bfin_process(struct pt_regs *fp)
{
unsigned int context = bfin_read_IPEND();
if (oops_in_progress)
pr_emerg("Kernel OOPS in progress\n");
if (context & 0x0020 && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR)
pr_notice("HW Error context\n");
else if (context & 0x0020)
pr_notice("Deferred Exception context\n");
else if (context & 0x3FC0)
pr_notice("Interrupt context\n");
else if (context & 0x4000)
pr_notice("Deferred Interrupt context\n");
else if (context & 0x8000)
pr_notice("Kernel process context\n");
if ((unsigned long)current >= FIXED_CODE_START &&
!((unsigned long)current & 0x3) && current->pid) {
pr_notice("CURRENT PROCESS:\n");
if (current->comm >= (char *)FIXED_CODE_START)
pr_notice("COMM=%s PID=%d",
current->comm, current->pid);
else
pr_notice("COMM= invalid");
pr_cont(" CPU=%d\n", current_thread_info()->cpu);
if (!((unsigned long)current->mm & 0x3) &&
(unsigned long)current->mm >= FIXED_CODE_START) {
pr_notice("TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n",
(void *)current->mm->start_code,
(void *)current->mm->end_code,
(void *)current->mm->start_data,
(void *)current->mm->end_data);
pr_notice(" BSS = 0x%p-0x%p USER-STACK = 0x%p\n\n",
(void *)current->mm->end_data,
(void *)current->mm->brk,
(void *)current->mm->start_stack);
} else
pr_notice("invalid mm\n");
} else
pr_notice("No Valid process in current context\n");
}
void dump_bfin_process(struct pt_regs *fp)
{
/* 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)
printk(KERN_EMERG "Kernel OOPS in progress\n");
if (context & 0x0020)
printk(KERN_NOTICE "Deferred excecption or HW Error context\n");
else if (context & 0x3FC0)
printk(KERN_NOTICE "Interrupt context\n");
else if (context & 0x4000)
printk(KERN_NOTICE "Deferred Interrupt context\n");
else if (context & 0x8000)
printk(KERN_NOTICE "Kernel process context\n");
if (current->pid && current->mm) {
printk(KERN_NOTICE "CURRENT PROCESS:\n");
printk(KERN_NOTICE "COMM=%s PID=%d\n",
current->comm, current->pid);
printk(KERN_NOTICE "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n"
KERN_NOTICE "BSS = 0x%p-0x%p USER-STACK = 0x%p\n"
KERN_NOTICE "\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
printk(KERN_NOTICE "\n" KERN_NOTICE
"No Valid process in current context\n");
}
static void decode_address(char *buf, unsigned long address)
{
struct vm_list_struct *vml;
struct task_struct *p;
struct mm_struct *mm;
unsigned long flags, offset;
unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic();
#ifdef CONFIG_KALLSYMS
unsigned long symsize;
const char *symname;
char *modname;
char *delim = ":";
char namebuf[128];
/* look up the address and see if we are in kernel space */
symname = kallsyms_lookup(address, &symsize, &offset, &modname, namebuf);
if (symname) {
/* yeah! kernel space! */
if (!modname)
modname = delim = "";
sprintf(buf, "<0x%p> { %s%s%s%s + 0x%lx }",
(void *)address, delim, modname, delim, symname,
(unsigned long)offset);
return;
}
#endif
/* Problem in fixed code section? */
if (address >= FIXED_CODE_START && address < FIXED_CODE_END) {
sprintf(buf, "<0x%p> /* Maybe fixed code section */", (void *)address);
return;
}
/* Problem somewhere before the kernel start address */
if (address < CONFIG_BOOT_LOAD) {
sprintf(buf, "<0x%p> /* Maybe null pointer? */", (void *)address);
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_irqsave(&tasklist_lock, flags);
for_each_process(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;
if (address >= vma->vm_start && address < vma->vm_end) {
char _tmpbuf[256];
char *name = p->comm;
struct file *file = vma->vm_file;
if (file)
name = d_path(&file->f_path, _tmpbuf,
sizeof(_tmpbuf));
/* FLAT does not have its text aligned to the start of
* the map while FDPIC ELF does ...
*/
/* 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, "<0x%p> [ %s + 0x%lx ]",
(void *)address, name, offset);
} else
sprintf(buf, "<0x%p> [ %s vma:0x%lx-0x%lx]",
(void *)address, name,
vma->vm_start, vma->vm_end);
if (!in_atomic)
mmput(mm);
if (!strlen(buf))
sprintf(buf, "<0x%p> [ %s ] dynamic memory", (void *)address, name);
goto done;
}
vml = vml->next;
}
if (!in_atomic)
mmput(mm);
}
/* we were unable to find this address anywhere */
sprintf(buf, "<0x%p> /* kernel dynamic memory */", (void *)address);
done:
write_unlock_irqrestore(&tasklist_lock, flags);
}
asmlinkage void trap_c(struct pt_regs *fp)
{
#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
int j;
#endif
int sig = 0;
siginfo_t info;
unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE;
trace_buffer_save(j);
/* Important - be very careful dereferncing pointers - will lead to
* double faults if the stack has become corrupt
*/
/* If the fault was caused by a kernel thread, or interrupt handler
* we will kernel panic, so the system reboots.
* If KGDB is enabled, don't set this for kernel breakpoints
*/
/* TODO: check to see if we are in some sort of deferred HWERR
* that we should be able to recover from, not kernel panic
*/
if ((bfin_read_IPEND() & 0xFFC0) && (trapnr != VEC_STEP)
#ifdef CONFIG_KGDB
&& (trapnr != VEC_EXCPT02)
#endif
) {
console_verbose();
oops_in_progress = 1;
} else if (current) {
if (current->mm == NULL) {
console_verbose();
oops_in_progress = 1;
}
}
/* trap_c() will be called for exceptions. During exceptions
* processing, the pc value should be set with retx value.
* With this change we can cleanup some code in signal.c- TODO
*/
fp->orig_pc = fp->retx;
/* printk("exception: 0x%x, ipend=%x, reti=%x, retx=%x\n",
trapnr, fp->ipend, fp->pc, fp->retx); */
/* send the appropriate signal to the user program */
switch (trapnr) {
/* This table works in conjuction with the one in ./mach-common/entry.S
* Some exceptions are handled there (in assembly, in exception space)
* Some are handled here, (in C, in interrupt space)
* Some, like CPLB, are handled in both, where the normal path is
* handled in assembly/exception space, and the error path is handled
* here
*/
/* 0x00 - Linux Syscall, getting here is an error */
/* 0x01 - userspace gdb breakpoint, handled here */
case VEC_EXCPT01:
info.si_code = TRAP_ILLTRAP;
sig = SIGTRAP;
CHK_DEBUGGER_TRAP_MAYBE();
/* Check if this is a breakpoint in kernel space */
if (fp->ipend & 0xffc0)
return;
else
break;
#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 */
#endif
/* 0x03 - User Defined, userspace stack overflow */
case VEC_EXCPT03:
info.si_code = SEGV_STACKFLOW;
sig = SIGSEGV;
printk(KERN_NOTICE EXC_0x03(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x04 - User Defined, Caught by default */
/* 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;
else
break;
/* 0x11 - Trace Buffer Full, handled here */
case VEC_OVFLOW:
info.si_code = TRAP_TRACEFLOW;
sig = SIGTRAP;
printk(KERN_NOTICE EXC_0x11(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x12 - Reserved, Caught by default */
/* 0x13 - Reserved, Caught by default */
/* 0x14 - Reserved, Caught by default */
/* 0x15 - Reserved, Caught by default */
/* 0x16 - Reserved, Caught by default */
/* 0x17 - Reserved, Caught by default */
/* 0x18 - Reserved, Caught by default */
/* 0x19 - Reserved, Caught by default */
/* 0x1A - Reserved, Caught by default */
/* 0x1B - Reserved, Caught by default */
/* 0x1C - Reserved, Caught by default */
/* 0x1D - Reserved, Caught by default */
/* 0x1E - Reserved, Caught by default */
/* 0x1F - Reserved, Caught by default */
/* 0x20 - Reserved, Caught by default */
/* 0x21 - Undefined Instruction, handled here */
case VEC_UNDEF_I:
info.si_code = ILL_ILLOPC;
sig = SIGILL;
printk(KERN_NOTICE EXC_0x21(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x22 - Illegal Instruction Combination, handled here */
case VEC_ILGAL_I:
info.si_code = ILL_ILLPARAOP;
sig = SIGILL;
printk(KERN_NOTICE EXC_0x22(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x23 - Data CPLB protection violation, handled here */
case VEC_CPLB_VL:
info.si_code = ILL_CPLB_VI;
sig = SIGBUS;
printk(KERN_NOTICE EXC_0x23(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x24 - Data access misaligned, handled here */
case VEC_MISALI_D:
info.si_code = BUS_ADRALN;
sig = SIGBUS;
printk(KERN_NOTICE EXC_0x24(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x25 - Unrecoverable Event, handled here */
case VEC_UNCOV:
info.si_code = ILL_ILLEXCPT;
sig = SIGILL;
printk(KERN_NOTICE EXC_0x25(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
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_NOTICE EXC_0x26(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero, handled here */
case VEC_CPLB_MHIT:
info.si_code = ILL_CPLB_MULHIT;
sig = SIGSEGV;
#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
if (saved_dcplb_fault_addr < FIXED_CODE_START)
printk(KERN_NOTICE "NULL pointer access\n");
else
#endif
printk(KERN_NOTICE EXC_0x27(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x28 - Emulation Watchpoint, handled here */
case VEC_WATCH:
info.si_code = TRAP_WATCHPT;
sig = SIGTRAP;
pr_debug(EXC_0x28(KERN_DEBUG));
CHK_DEBUGGER_TRAP_MAYBE();
/* Check if this is a watchpoint in kernel space */
if (fp->ipend & 0xffc0)
return;
else
break;
#ifdef CONFIG_BF535
/* 0x29 - Instruction fetch access error (535 only) */
case VEC_ISTRU_VL: /* ADSP-BF535 only (MH) */
info.si_code = BUS_OPFETCH;
sig = SIGBUS;
printk(KERN_NOTICE "BF535: VEC_ISTRU_VL\n");
CHK_DEBUGGER_TRAP();
break;
#else
/* 0x29 - Reserved, Caught by default */
#endif
/* 0x2A - Instruction fetch misaligned, handled here */
case VEC_MISALI_I:
info.si_code = BUS_ADRALN;
sig = SIGBUS;
printk(KERN_NOTICE EXC_0x2A(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x2B - Instruction CPLB protection violation, handled here */
case VEC_CPLB_I_VL:
info.si_code = ILL_CPLB_VI;
sig = SIGBUS;
printk(KERN_NOTICE EXC_0x2B(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x2C - Instruction CPLB miss, handled in _cplb_hdr */
case VEC_CPLB_I_M:
info.si_code = ILL_CPLB_MISS;
sig = SIGBUS;
printk(KERN_NOTICE EXC_0x2C(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x2D - Instruction CPLB Multiple Hits, handled here */
case VEC_CPLB_I_MHIT:
info.si_code = ILL_CPLB_MULHIT;
sig = SIGSEGV;
#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
if (saved_icplb_fault_addr < FIXED_CODE_START)
printk(KERN_NOTICE "Jump to NULL address\n");
else
#endif
printk(KERN_NOTICE EXC_0x2D(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x2E - Illegal use of Supervisor Resource, handled here */
case VEC_ILL_RES:
info.si_code = ILL_PRVOPC;
sig = SIGILL;
printk(KERN_NOTICE EXC_0x2E(KERN_NOTICE));
CHK_DEBUGGER_TRAP();
break;
/* 0x2F - Reserved, Caught by default */
/* 0x30 - Reserved, Caught by default */
/* 0x31 - Reserved, Caught by default */
/* 0x32 - Reserved, Caught by default */
/* 0x33 - Reserved, Caught by default */
/* 0x34 - Reserved, Caught by default */
/* 0x35 - Reserved, Caught by default */
/* 0x36 - Reserved, Caught by default */
/* 0x37 - Reserved, Caught by default */
/* 0x38 - Reserved, Caught by default */
/* 0x39 - Reserved, Caught by default */
/* 0x3A - Reserved, Caught by default */
/* 0x3B - Reserved, Caught by default */
/* 0x3C - Reserved, Caught by default */
/* 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;
printk(KERN_NOTICE HWC_x2(KERN_NOTICE));
break;
/* External Memory Addressing Error */
case (SEQSTAT_HWERRCAUSE_EXTERN_ADDR):
info.si_code = BUS_ADRERR;
sig = SIGBUS;
printk(KERN_NOTICE HWC_x3(KERN_NOTICE));
break;
/* Performance Monitor Overflow */
case (SEQSTAT_HWERRCAUSE_PERF_FLOW):
printk(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();
break;
default:
info.si_code = TRAP_ILLTRAP;
sig = SIGTRAP;
printk(KERN_EMERG "Caught Unhandled Exception, code = %08lx\n",
(fp->seqstat & SEQSTAT_EXCAUSE));
CHK_DEBUGGER_TRAP();
break;
}
BUG_ON(sig == 0);
if (sig != SIGTRAP) {
unsigned long *stack;
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)
printk(KERN_NOTICE "No trace since you do not have "
"CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE enabled\n"
KERN_NOTICE "\n");
else
#endif
dump_bfin_trace_buffer();
if (oops_in_progress) {
/* Dump the current kernel stack */
printk(KERN_NOTICE "\n" KERN_NOTICE "Kernel Stack\n");
show_stack(current, NULL);
print_modules();
#ifndef CONFIG_ACCESS_CHECK
printk(KERN_EMERG "Please turn on "
"CONFIG_ACCESS_CHECK\n");
#endif
panic("Kernel exception");
} else {
/* Dump the user space stack */
stack = (unsigned long *)rdusp();
printk(KERN_NOTICE "Userspace Stack\n");
show_stack(NULL, stack);
}
}
info.si_signo = sig;
info.si_errno = 0;
info.si_addr = (void __user *)fp->pc;
force_sig_info(sig, &info, current);
trace_buffer_restore(j);
return;
}
void decode_address(char *buf, unsigned long address)
{
struct task_struct *p;
struct mm_struct *mm;
unsigned long flags, offset;
unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic();
struct rb_node *n;
#ifdef CONFIG_KALLSYMS
unsigned long symsize;
const char *symname;
char *modname;
char *delim = ":";
char namebuf[128];
#endif
buf += sprintf(buf, "<0x%08lx> ", address);
#ifdef CONFIG_KALLSYMS
symname = kallsyms_lookup(address, &symsize, &offset, &modname, namebuf);
if (symname) {
if (!modname)
modname = delim = "";
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) {
strcat(buf, "/* Maybe fixed code section */");
return;
} else if (address < CONFIG_BOOT_LOAD) {
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;
} else if (address >= L1_SCRATCH_START && address < L1_SCRATCH_START + L1_SCRATCH_LENGTH) {
strcat(buf, "/* on-chip scratchpad */");
return;
} else if (address >= physical_mem_end && address < ASYNC_BANK0_BASE) {
strcat(buf, "/* unconnected memory */");
return;
} else if (address >= ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE && address < BOOT_ROM_START) {
strcat(buf, "/* reserved memory */");
return;
} else if (address >= L1_DATA_A_START && address < L1_DATA_A_START + L1_DATA_A_LENGTH) {
strcat(buf, "/* on-chip Data Bank A */");
return;
} else if (address >= L1_DATA_B_START && address < L1_DATA_B_START + L1_DATA_B_LENGTH) {
strcat(buf, "/* on-chip Data Bank B */");
return;
}
if (oops_in_progress) {
strcat(buf, "/* kernel dynamic memory (maybe user-space) */");
return;
}
write_lock_irqsave(&tasklist_lock, flags);
for_each_process(p) {
mm = (in_atomic ? p->mm : get_task_mm(p));
if (!mm)
continue;
if (!down_read_trylock(&mm->mmap_sem)) {
if (!in_atomic)
mmput(mm);
continue;
}
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 *d_name = d_path(&file->f_path, _tmpbuf,
sizeof(_tmpbuf));
if (!IS_ERR(d_name))
name = d_name;
}
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);
up_read(&mm->mmap_sem);
if (!in_atomic)
mmput(mm);
if (buf[0] == '\0')
sprintf(buf, "[ %s ] dynamic memory", name);
goto done;
}
}
up_read(&mm->mmap_sem);
if (!in_atomic)
mmput(mm);
}
sprintf(buf, "/* kernel dynamic memory */");
done:
write_unlock_irqrestore(&tasklist_lock, flags);
}