/*
- * File: arch/blackfin/kernel/traps.c
- * Based on:
- * Author: Hamish Macdonald
+ * Copyright 2004-2009 Analog Devices Inc.
*
- * Created:
- * Description: uses S/W interrupt 15 for the system calls
- *
- * Modified:
- * Copyright 2004-2006 Analog Devices Inc.
- *
- * Bugs: Enter bugs at http://blackfin.uclinux.org/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * Licensed under the GPL-2 or later
*/
+#include <linux/bug.h>
#include <linux/uaccess.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/kallsyms.h>
#include <linux/fs.h>
+#include <linux/rbtree.h>
#include <asm/traps.h>
#include <asm/cacheflush.h>
+#include <asm/cplb.h>
+#include <asm/dma.h>
#include <asm/blackfin.h>
#include <asm/irq_handler.h>
+#include <linux/irq.h>
#include <asm/trace.h>
#include <asm/fixed_code.h>
#ifdef CONFIG_KGDB
-# include <linux/debugger.h>
# include <linux/kgdb.h>
# define CHK_DEBUGGER_TRAP() \
do { \
- CHK_DEBUGGER(trapnr, sig, info.si_code, fp, ); \
+ kgdb_handle_exception(trapnr, sig, info.si_code, fp); \
} while (0)
# define CHK_DEBUGGER_TRAP_MAYBE() \
do { \
# 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 */
void __init trap_init(void)
{
CSYNC();
}
-int kstack_depth_to_print = 48;
-
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 flags, offset;
- unsigned int in_exception = bfin_read_IPEND() & 0x10;
+ unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic();
+ struct rb_node *n;
#ifdef CONFIG_KALLSYMS
unsigned long symsize;
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);
/* 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);
+ sprintf(buf, "{ %s%s%s%s + 0x%lx }",
+ 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);
+ /* 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;
- }
- /* Problem somewhere before the kernel start address */
- if (address < CONFIG_BOOT_LOAD) {
- sprintf(buf, "<0x%p> /* Maybe null pointer? */", (void *)address);
+ } else if (address >= L1_ROM_START && address < L1_ROM_START + L1_ROM_LENGTH) {
+ strcat(buf, "/* on-chip L1 ROM */");
return;
}
*/
write_lock_irqsave(&tasklist_lock, flags);
for_each_process(p) {
- mm = (in_exception ? 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);
- sprintf(buf, "<0x%p> [ %s + 0x%lx ]",
- (void *)address, name, offset);
- if (!in_exception)
+ /* 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);
+
+ if (!in_atomic)
mmput(mm);
+
+ if (buf[0] == '\0')
+ sprintf(buf, "[ %s ] dynamic memory", name);
+
goto done;
}
-
- vml = vml->next;
}
- if (!in_exception)
+ if (!in_atomic)
mmput(mm);
}
/* we were unable to find this address anywhere */
- sprintf(buf, "<0x%p> /* unknown address */", (void *)address);
+ sprintf(buf, "/* kernel dynamic memory */");
done:
write_unlock_irqrestore(&tasklist_lock, flags);
+#else
+ sprintf(buf, " ");
+#endif
}
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;
- printk(KERN_EMERG "\n" KERN_EMERG "Double Fault\n");
- dump_bfin_regs(fp, (void *)fp->retx);
- panic("Double Fault - unrecoverable event\n");
+#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 = raw_smp_processor_id();
+ char buf[150];
+ decode_address(buf, cpu_pda[cpu].retx_doublefault);
+ printk(KERN_EMERG "While handling exception (EXCAUSE = 0x%x) at %s:\n",
+ (unsigned int)cpu_pda[cpu].seqstat_doublefault & SEQSTAT_EXCAUSE, buf);
+ decode_address(buf, cpu_pda[cpu].dcplb_doublefault_addr);
+ printk(KERN_NOTICE " DCPLB_FAULT_ADDR: %s\n", buf);
+ decode_address(buf, cpu_pda[cpu].icplb_doublefault_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)
+asmlinkage notrace void trap_c(struct pt_regs *fp)
{
#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
int j;
#endif
+#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
+ unsigned int cpu = raw_smp_processor_id();
+#endif
+ const char *strerror = NULL;
int sig = 0;
siginfo_t info;
unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE;
trace_buffer_save(j);
+#if defined(CONFIG_DEBUG_MMRS) || defined(CONFIG_DEBUG_MMRS_MODULE)
+ last_seqstat = (u32)fp->seqstat;
+#endif
/* 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
- */
- if ((bfin_read_IPEND() & 0xFFC0)
-#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
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;
-#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);
+ 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
+ info.si_code = TRAP_ILLTRAP;
+ sig = SIGTRAP;
CHK_DEBUGGER_TRAP();
+ goto traps_done;
+#endif
+ /* 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 - 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;
+ 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_NOTICE 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 */
/* 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_NOTICE 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_NOTICE EXC_0x22);
- CHK_DEBUGGER_TRAP();
+ strerror = KERN_NOTICE EXC_0x22(KERN_NOTICE);
+ CHK_DEBUGGER_TRAP_MAYBE();
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);
- CHK_DEBUGGER_TRAP();
+ sig = SIGSEGV;
+ 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_NOTICE 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_NOTICE 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_NOTICE 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_NOTICE "NULL pointer access (probably)\n");
-#else
- sig = SIGILL;
- printk(KERN_NOTICE 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
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();
+ strerror = KERN_NOTICE "BF535: VEC_ISTRU_VL\n";
+ CHK_DEBUGGER_TRAP_MAYBE();
break;
#else
/* 0x29 - Reserved, Caught by default */
case VEC_MISALI_I:
info.si_code = BUS_ADRALN;
sig = SIGBUS;
- printk(KERN_NOTICE EXC_0x2A);
- CHK_DEBUGGER_TRAP();
+ strerror = KERN_NOTICE EXC_0x2A(KERN_NOTICE);
+ CHK_DEBUGGER_TRAP_MAYBE();
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);
- CHK_DEBUGGER_TRAP();
+ 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_NOTICE 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_NOTICE "Jump to address 0 - 0x0fff\n");
-#else
- sig = SIGILL;
- printk(KERN_NOTICE 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_NOTICE 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 */
/* 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;
}
BUG_ON(sig == 0);
+ /* If the fault was caused by a kernel thread, or interrupt handler
+ * we will kernel panic, so the system reboots.
+ */
+ if (kernel_mode_regs(fp) || (current && !current->mm)) {
+ console_verbose();
+ oops_in_progress = 1;
+ }
+
if (sig != SIGTRAP) {
- unsigned long stack;
- dump_bfin_regs(fp, (void *)fp->retx);
+ 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)
- printk(KERN_NOTICE "No trace since you do not have "
- "CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE enabled\n"
- KERN_NOTICE "\n");
+ 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();
- show_stack(current, &stack);
+
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
- printk(KERN_EMERG "Please turn on "
+ verbose_printk(KERN_EMERG "Please turn on "
"CONFIG_ACCESS_CHECK\n");
#endif
panic("Kernel exception");
+ } else {
+#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
}
+ }
- /* Ensure that bad return addresses don't end up in an infinite
- * loop, due to speculative loads/reads
- */
- if (trapnr == VEC_CPLB_I_M)
- fp->pc = SAFE_USER_INSTRUCTION;
+#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);
}
- info.si_signo = sig;
- info.si_errno = 0;
- info.si_addr = (void *)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 success, 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)
{
+#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
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)) {
for (; bfin_read_TBUFSTAT() & TBUFCNT; i++) {
decode_address(buf, (unsigned long)bfin_read_TBUF());
printk(KERN_NOTICE "%4i Target : %s\n", i, buf);
- decode_address(buf, (unsigned long)bfin_read_TBUF());
- printk(KERN_NOTICE " Source : %s\n", 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 - 1;
+ index = trace_buff_offset / 4;
else
index = EXPAND_LEN;
if (index < 0 )
index = EXPAND_LEN;
decode_address(buf, software_trace_buff[index]);
- printk(KERN_NOTICE " Source : %s\n", buf);
+ printk(KERN_NOTICE " Source : %s ", buf);
+ decode_instruction((unsigned short *)software_trace_buff[index]);
+ printk("\n");
index -= 1;
if (index < 0)
index = EXPAND_LEN;
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;
-
- printk(KERN_NOTICE "\n" KERN_NOTICE "Call Trace:\n");
-
- 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);
- }
+ unsigned short opcode;
+
+ 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(KERN_NOTICE "\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);
- addr = (unsigned long)stack;
- endstack = (unsigned long *)PAGE_ALIGN(addr);
+ printk(KERN_NOTICE "Stack info:\n");
+ decode_address(buf, (unsigned int)stack);
+ printk(KERN_NOTICE " SP: [0x%p] %s\n", stack, buf);
- printk(KERN_NOTICE "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_NOTICE " ");
- printk(" %08lx", *stack++);
+ if (!access_ok(VERIFY_READ, stack, (unsigned int)endstack - (unsigned int)stack)) {
+ printk(KERN_NOTICE "Invalid stack pointer\n");
+ return;
+ }
+
+ /* 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;
+
+ 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;
+ }
}
- printk("\n");
+ if (fp) {
+ frame = fp;
+ printk(KERN_NOTICE " FP: (0x%p)\n", fp);
+ } else
+ frame = 0;
- show_trace(task, stack);
+ /*
+ * 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++;
+
+ } else if (!j)
+ printk(" %08x ", *addr);
+ }
+ if (!j)
+ printk("\n");
+ }
+#endif
}
+EXPORT_SYMBOL(show_stack);
void dump_stack(void)
{
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)
{
- char buf [150];
-
- if (!oops_in_progress) {
- if (current->pid && current->mm) {
- printk(KERN_NOTICE "\n" KERN_NOTICE "CURRENT PROCESS:\n");
- printk(KERN_NOTICE "COMM=%s PID=%d\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 "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",
+ 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->brk,
(void *)current->mm->start_stack);
- } else {
- printk (KERN_NOTICE "\n" KERN_NOTICE
- "No Valid pid - Either things are really messed up,"
- " or you are in the kernel\n");
- }
- } else {
- printk(KERN_NOTICE "Kernel or interrupt exception\n");
- print_modules();
+ 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;
+
+ 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;
}
- if (retaddr >= (void *)FIXED_CODE_START && 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;
- printk(KERN_NOTICE "return address: [0x%p]; contents of:", retaddr);
- for (; i < ((unsigned int)retaddr & 0xFFFFFFF0) + 32; i += 2) {
- if (!(i & 0xF))
- printk("\n" KERN_NOTICE "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. This only happens in kernel
- * context, which should mean an oops is happening
- */
- if (oops_in_progress && 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");
- } else
- printk("\n" KERN_NOTICE
- "Cannot look at the [PC] <%p> for it is"
- " in unreadable memory - sorry\n", retaddr);
+#endif
+ }
+#endif
+}
- printk(KERN_NOTICE "\n" KERN_NOTICE "SEQUENCER STATUS:\n");
- printk(KERN_NOTICE " SEQSTAT: %08lx IPEND: %04lx SYSCFG: %04lx\n",
- (long)fp->seqstat, fp->ipend, fp->syscfg);
+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 = raw_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[raw_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[raw_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[raw_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);
- printk(KERN_NOTICE " RETE: %s\n", buf);
+ verbose_printk(KERN_NOTICE " RETE: %s\n", buf);
decode_address(buf, fp->retn);
- printk(KERN_NOTICE " RETN: %s\n", buf);
+ verbose_printk(KERN_NOTICE " RETN: %s\n", buf);
decode_address(buf, fp->retx);
- printk(KERN_NOTICE " RETX: %s\n", buf);
+ verbose_printk(KERN_NOTICE " RETX: %s\n", buf);
decode_address(buf, fp->rets);
- printk(KERN_NOTICE " RETS: %s\n", buf);
-
- if ((long)fp->seqstat & SEQSTAT_EXCAUSE) {
- decode_address(buf, bfin_read_DCPLB_FAULT_ADDR());
- printk(KERN_NOTICE "DCPLB_FAULT_ADDR: %s\n", buf);
- decode_address(buf, bfin_read_ICPLB_FAULT_ADDR());
- printk(KERN_NOTICE "ICPLB_FAULT_ADDR: %s\n", buf);
+ 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);
}
- printk(KERN_NOTICE "\n" KERN_NOTICE "PROCESSOR STATE:\n");
- printk(KERN_NOTICE " R0 : %08lx R1 : %08lx R2 : %08lx R3 : %08lx\n",
+ 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_NOTICE " 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_NOTICE " 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_NOTICE " P4 : %08lx P5 : %08lx FP : %08lx SP : %08lx\n",
+ verbose_printk(KERN_NOTICE " P4 : %08lx P5 : %08lx FP : %08lx SP : %08lx\n",
fp->p4, fp->p5, fp->fp, (long)fp);
- printk(KERN_NOTICE " LB0: %08lx LT0: %08lx LC0: %08lx\n",
+ verbose_printk(KERN_NOTICE " LB0: %08lx LT0: %08lx LC0: %08lx\n",
fp->lb0, fp->lt0, fp->lc0);
- printk(KERN_NOTICE " 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_NOTICE " 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_NOTICE " 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_NOTICE " 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_NOTICE " 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);
- printk(KERN_NOTICE "A0.w: %08lx A0.x: %08lx A1.w: %08lx A1.x: %08lx\n",
+ 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_NOTICE "USP : %08lx ASTAT: %08lx\n",
+ verbose_printk(KERN_NOTICE "USP : %08lx ASTAT: %08lx\n",
rdusp(), fp->astat);
- printk(KERN_NOTICE "\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;
}
oops_in_progress = 1;
- 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);
+ dump_bfin_process(fp);
+ dump_bfin_mem(fp);
+ show_regs(fp);
dump_stack();
- panic("Unrecoverable event\n");
+ panic("Unrecoverable event");
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff