summaryrefslogtreecommitdiff
path: root/arch/blackfin/kernel/traps.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/blackfin/kernel/traps.c')
-rw-r--r--arch/blackfin/kernel/traps.c115
1 files changed, 53 insertions, 62 deletions
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index bf2b2d1f8ae5..6b7325d634af 100644
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -1,30 +1,7 @@
/*
- * 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>
@@ -100,7 +77,11 @@ static void decode_address(char *buf, 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);
@@ -108,23 +89,33 @@ static void decode_address(char *buf, unsigned long address)
/* 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;
- }
- /* Problem somewhere before the kernel start address */
- if (address < CONFIG_BOOT_LOAD) {
- sprintf(buf, "<0x%p> /* Maybe null pointer? */", (void *)address);
+ } 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;
}
@@ -172,18 +163,16 @@ static void decode_address(char *buf, unsigned long address)
offset = (address - vma->vm_start) +
(vma->vm_pgoff << PAGE_SHIFT);
- sprintf(buf, "<0x%p> [ %s + 0x%lx ]",
- (void *)address, name, offset);
+ sprintf(buf, "[ %s + 0x%lx ]", name, offset);
} else
- sprintf(buf, "<0x%p> [ %s vma:0x%lx-0x%lx]",
- (void *)address, name,
- vma->vm_start, vma->vm_end);
+ sprintf(buf, "[ %s vma:0x%lx-0x%lx]",
+ 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);
+ if (buf[0] == '\0')
+ sprintf(buf, "[ %s ] dynamic memory", name);
goto done;
}
@@ -193,7 +182,7 @@ static void decode_address(char *buf, unsigned long address)
}
/* we were unable to find this address anywhere */
- sprintf(buf, "<0x%p> /* kernel dynamic memory */", (void *)address);
+ sprintf(buf, "/* kernel dynamic memory */");
done:
write_unlock_irqrestore(&tasklist_lock, flags);
@@ -215,14 +204,14 @@ asmlinkage void double_fault_c(struct pt_regs *fp)
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();
+ unsigned int cpu = raw_smp_processor_id();
char buf[150];
- decode_address(buf, cpu_pda[cpu].retx);
+ 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 & SEQSTAT_EXCAUSE, buf);
- decode_address(buf, cpu_pda[cpu].dcplb_fault_addr);
+ (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_fault_addr);
+ decode_address(buf, cpu_pda[cpu].icplb_doublefault_addr);
printk(KERN_NOTICE " ICPLB_FAULT_ADDR: %s\n", buf);
decode_address(buf, fp->retx);
@@ -245,13 +234,13 @@ 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 = smp_processor_id();
+ unsigned int cpu = raw_smp_processor_id();
#endif
const char *strerror = NULL;
int sig = 0;
@@ -267,11 +256,6 @@ asmlinkage void trap_c(struct pt_regs *fp)
* double faults if the stack has become corrupt
*/
-#ifndef CONFIG_KGDB
- /* IPEND is skipped if KGDB isn't enabled (see entry code) */
- fp->ipend = bfin_read_IPEND();
-#endif
-
/* 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
@@ -404,7 +388,7 @@ asmlinkage void trap_c(struct pt_regs *fp)
/* 0x23 - Data CPLB protection violation, handled here */
case VEC_CPLB_VL:
info.si_code = ILL_CPLB_VI;
- sig = SIGBUS;
+ sig = SIGSEGV;
strerror = KERN_NOTICE EXC_0x23(KERN_NOTICE);
CHK_DEBUGGER_TRAP_MAYBE();
break;
@@ -904,7 +888,7 @@ void show_stack(struct task_struct *task, unsigned long *stack)
frame_no = 0;
for (addr = (unsigned int *)((unsigned int)stack & ~0xF), i = 0;
- addr <= endstack; addr++, i++) {
+ addr < endstack; addr++, i++) {
ret_addr = 0;
if (!j && i % 8 == 0)
@@ -949,6 +933,7 @@ void show_stack(struct task_struct *task, unsigned long *stack)
}
#endif
}
+EXPORT_SYMBOL(show_stack);
void dump_stack(void)
{
@@ -1090,7 +1075,7 @@ void show_regs(struct pt_regs *fp)
struct irqaction *action;
unsigned int i;
unsigned long flags = 0;
- unsigned int cpu = smp_processor_id();
+ unsigned int cpu = raw_smp_processor_id();
unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic();
verbose_printk(KERN_NOTICE "\n");
@@ -1116,10 +1101,16 @@ void show_regs(struct pt_regs *fp)
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 SYSCFG: %04lx\n",
- (long)fp->seqstat, fp->ipend, fp->syscfg);
+ 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);
generated by cgit v1.2.3 (git 2.0.4) at 2024-04-19 11:40:44 +0000