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Diffstat (limited to 'arch/blackfin/kernel/traps.c')
-rw-r--r--arch/blackfin/kernel/traps.c637
1 files changed, 459 insertions, 178 deletions
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index f061f5181623..1aa2c788e228 100644
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -34,20 +34,19 @@
#include <linux/fs.h>
#include <asm/traps.h>
#include <asm/cacheflush.h>
+#include <asm/cplb.h>
#include <asm/blackfin.h>
#include <asm/irq_handler.h>
#include <linux/irq.h>
#include <asm/trace.h>
#include <asm/fixed_code.h>
-#include <asm/dma.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 { \
@@ -59,6 +58,15 @@
# define CHK_DEBUGGER_TRAP_MAYBE() do { } while (0)
#endif
+
+#ifdef CONFIG_VERBOSE_DEBUG
+#define verbose_printk(fmt, arg...) \
+ printk(fmt, ##arg)
+#else
+#define verbose_printk(fmt, arg...) \
+ ({ if (0) printk(fmt, ##arg); 0; })
+#endif
+
/* Initiate the event table handler */
void __init trap_init(void)
{
@@ -67,12 +75,19 @@ void __init trap_init(void)
CSYNC();
}
-unsigned long saved_icplb_fault_addr, saved_dcplb_fault_addr;
-
-int kstack_depth_to_print = 48;
+/*
+ * Used to save the RETX, SEQSTAT, I/D CPLB FAULT ADDR
+ * values across the transition from exception to IRQ5.
+ * We put these in L1, so they are going to be in a valid
+ * location during exception context
+ */
+__attribute__((l1_data))
+unsigned long saved_retx, saved_seqstat,
+ saved_icplb_fault_addr, saved_dcplb_fault_addr;
static void decode_address(char *buf, unsigned long address)
{
+#ifdef CONFIG_DEBUG_VERBOSE
struct vm_list_struct *vml;
struct task_struct *p;
struct mm_struct *mm;
@@ -163,6 +178,9 @@ static void decode_address(char *buf, unsigned long address)
if (!in_atomic)
mmput(mm);
+ if (!strlen(buf))
+ sprintf(buf, "<0x%p> [ %s ] dynamic memory", (void *)address, name);
+
goto done;
}
@@ -173,20 +191,43 @@ static void decode_address(char *buf, unsigned long address)
}
/* we were unable to find this address anywhere */
- sprintf(buf, "<0x%p> /* unknown address */", (void *)address);
+ sprintf(buf, "<0x%p> /* kernel dynamic memory */", (void *)address);
done:
write_unlock_irqrestore(&tasklist_lock, flags);
+#else
+ sprintf(buf, " ");
+#endif
}
asmlinkage void double_fault_c(struct pt_regs *fp)
{
console_verbose();
oops_in_progress = 1;
+#ifdef CONFIG_DEBUG_VERBOSE
printk(KERN_EMERG "\n" KERN_EMERG "Double Fault\n");
- dump_bfin_process(fp);
- dump_bfin_mem(fp);
- show_regs(fp);
+#ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT
+ if (((long)fp->seqstat & SEQSTAT_EXCAUSE) == VEC_UNCOV) {
+ char buf[150];
+ decode_address(buf, saved_retx);
+ printk(KERN_EMERG "While handling exception (EXCAUSE = 0x%x) at %s:\n",
+ (int)saved_seqstat & SEQSTAT_EXCAUSE, buf);
+ decode_address(buf, saved_dcplb_fault_addr);
+ printk(KERN_NOTICE " DCPLB_FAULT_ADDR: %s\n", buf);
+ decode_address(buf, saved_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);
+ }
+#endif
panic("Double Fault - unrecoverable event\n");
}
@@ -258,34 +299,42 @@ asmlinkage void trap_c(struct pt_regs *fp)
return;
else
break;
+ /* 0x03 - User Defined, userspace stack overflow */
+ case VEC_EXCPT03:
+ info.si_code = SEGV_STACKFLOW;
+ sig = SIGSEGV;
+ verbose_printk(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 */
#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();
+ /* 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;
+ verbose_printk(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;
@@ -300,8 +349,8 @@ asmlinkage void trap_c(struct pt_regs *fp)
case VEC_OVFLOW:
info.si_code = TRAP_TRACEFLOW;
sig = SIGTRAP;
- printk(KERN_NOTICE EXC_0x11(KERN_NOTICE));
- CHK_DEBUGGER_TRAP();
+ verbose_printk(KERN_NOTICE EXC_0x11(KERN_NOTICE));
+ CHK_DEBUGGER_TRAP_MAYBE();
break;
/* 0x12 - Reserved, Caught by default */
/* 0x13 - Reserved, Caught by default */
@@ -322,44 +371,43 @@ asmlinkage void trap_c(struct pt_regs *fp)
case VEC_UNDEF_I:
info.si_code = ILL_ILLOPC;
sig = SIGILL;
- printk(KERN_NOTICE EXC_0x21(KERN_NOTICE));
- CHK_DEBUGGER_TRAP();
+ verbose_printk(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(KERN_NOTICE));
- CHK_DEBUGGER_TRAP();
+ verbose_printk(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(KERN_NOTICE));
- CHK_DEBUGGER_TRAP();
+ verbose_printk(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(KERN_NOTICE));
- CHK_DEBUGGER_TRAP();
+ verbose_printk(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(KERN_NOTICE));
- CHK_DEBUGGER_TRAP();
+ verbose_printk(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(KERN_NOTICE));
- CHK_DEBUGGER_TRAP();
+ verbose_printk(KERN_NOTICE EXC_0x26(KERN_NOTICE));
break;
/* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero, handled here */
case VEC_CPLB_MHIT:
@@ -367,11 +415,11 @@ asmlinkage void trap_c(struct pt_regs *fp)
sig = SIGSEGV;
#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
if (saved_dcplb_fault_addr < FIXED_CODE_START)
- printk(KERN_NOTICE "NULL pointer access\n");
+ verbose_printk(KERN_NOTICE "NULL pointer access\n");
else
#endif
- printk(KERN_NOTICE EXC_0x27(KERN_NOTICE));
- CHK_DEBUGGER_TRAP();
+ verbose_printk(KERN_NOTICE EXC_0x27(KERN_NOTICE));
+ CHK_DEBUGGER_TRAP_MAYBE();
break;
/* 0x28 - Emulation Watchpoint, handled here */
case VEC_WATCH:
@@ -389,8 +437,8 @@ 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_NOTICE "BF535: VEC_ISTRU_VL\n");
- CHK_DEBUGGER_TRAP();
+ verbose_printk(KERN_NOTICE "BF535: VEC_ISTRU_VL\n");
+ CHK_DEBUGGER_TRAP_MAYBE();
break;
#else
/* 0x29 - Reserved, Caught by default */
@@ -399,22 +447,21 @@ asmlinkage void trap_c(struct pt_regs *fp)
case VEC_MISALI_I:
info.si_code = BUS_ADRALN;
sig = SIGBUS;
- printk(KERN_NOTICE EXC_0x2A(KERN_NOTICE));
- CHK_DEBUGGER_TRAP();
+ verbose_printk(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(KERN_NOTICE));
- CHK_DEBUGGER_TRAP();
+ verbose_printk(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(KERN_NOTICE));
- CHK_DEBUGGER_TRAP();
+ verbose_printk(KERN_NOTICE EXC_0x2C(KERN_NOTICE));
break;
/* 0x2D - Instruction CPLB Multiple Hits, handled here */
case VEC_CPLB_I_MHIT:
@@ -422,18 +469,18 @@ asmlinkage void trap_c(struct pt_regs *fp)
sig = SIGSEGV;
#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
if (saved_icplb_fault_addr < FIXED_CODE_START)
- printk(KERN_NOTICE "Jump to NULL address\n");
+ verbose_printk(KERN_NOTICE "Jump to NULL address\n");
else
#endif
- printk(KERN_NOTICE EXC_0x2D(KERN_NOTICE));
- CHK_DEBUGGER_TRAP();
+ verbose_printk(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(KERN_NOTICE));
- CHK_DEBUGGER_TRAP();
+ verbose_printk(KERN_NOTICE EXC_0x2E(KERN_NOTICE));
+ CHK_DEBUGGER_TRAP_MAYBE();
break;
/* 0x2F - Reserved, Caught by default */
/* 0x30 - Reserved, Caught by default */
@@ -460,17 +507,17 @@ asmlinkage void trap_c(struct pt_regs *fp)
case (SEQSTAT_HWERRCAUSE_SYSTEM_MMR):
info.si_code = BUS_ADRALN;
sig = SIGBUS;
- printk(KERN_NOTICE HWC_x2(KERN_NOTICE));
+ verbose_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));
+ verbose_printk(KERN_NOTICE HWC_x3(KERN_NOTICE));
break;
/* Performance Monitor Overflow */
case (SEQSTAT_HWERRCAUSE_PERF_FLOW):
- printk(KERN_NOTICE HWC_x12(KERN_NOTICE));
+ verbose_printk(KERN_NOTICE HWC_x12(KERN_NOTICE));
break;
/* RAISE 5 instruction */
case (SEQSTAT_HWERRCAUSE_RAISE_5):
@@ -480,21 +527,25 @@ asmlinkage void trap_c(struct pt_regs *fp)
printk(KERN_NOTICE HWC_default(KERN_NOTICE));
break;
}
- CHK_DEBUGGER_TRAP();
+ 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",
+ oops_in_progress = 1;
+ 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 (sig != SIGTRAP) {
- unsigned long stack;
dump_bfin_process(fp);
dump_bfin_mem(fp);
show_regs(fp);
@@ -502,20 +553,31 @@ asmlinkage void trap_c(struct pt_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 "
+ verbose_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();
- show_stack(current, &stack);
+
if (oops_in_progress) {
+ /* Dump the current kernel stack */
+ verbose_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 "
+ verbose_printk(KERN_EMERG "Please turn on "
"CONFIG_ACCESS_CHECK\n");
#endif
panic("Kernel exception");
+ } else {
+#ifdef CONFIG_VERBOSE_DEBUG
+ unsigned long *stack;
+ /* Dump the user space stack */
+ stack = (unsigned long *)rdusp();
+ verbose_printk(KERN_NOTICE "Userspace Stack\n");
+ show_stack(NULL, stack);
+#endif
}
}
@@ -532,11 +594,117 @@ asmlinkage void trap_c(struct pt_regs *fp)
#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;
+
+ addr = (unsigned long)address;
+
+ /* Check for odd addresses */
+ if (addr & 0x1)
+ return false;
+
+ /* Check that things do not wrap around */
+ if (addr > (addr + 2))
+ return false;
+
+ /*
+ * Since we are in exception context, we need to do a little address checking
+ * We need to make sure we are only accessing valid memory, and
+ * we don't read something in the async space that can hang forever
+ */
+ if ((addr >= FIXED_CODE_START && (addr + 2) <= physical_mem_end) ||
+#if L2_LENGTH != 0
+ (addr >= L2_START && (addr + 2) <= (L2_START + L2_LENGTH)) ||
+#endif
+ (addr >= BOOT_ROM_START && (addr + 2) <= (BOOT_ROM_START + BOOT_ROM_LENGTH)) ||
+#if L1_DATA_A_LENGTH != 0
+ (addr >= L1_DATA_A_START && (addr + 2) <= (L1_DATA_A_START + L1_DATA_A_LENGTH)) ||
+#endif
+#if L1_DATA_B_LENGTH != 0
+ (addr >= L1_DATA_B_START && (addr + 2) <= (L1_DATA_B_START + L1_DATA_B_LENGTH)) ||
+#endif
+ (addr >= L1_SCRATCH_START && (addr + 2) <= (L1_SCRATCH_START + L1_SCRATCH_LENGTH)) ||
+ (!(bfin_read_EBIU_AMBCTL0() & B0RDYEN) &&
+ addr >= ASYNC_BANK0_BASE && (addr + 2) <= (ASYNC_BANK0_BASE + ASYNC_BANK0_SIZE)) ||
+ (!(bfin_read_EBIU_AMBCTL0() & B1RDYEN) &&
+ addr >= ASYNC_BANK1_BASE && (addr + 2) <= (ASYNC_BANK1_BASE + ASYNC_BANK1_SIZE)) ||
+ (!(bfin_read_EBIU_AMBCTL1() & B2RDYEN) &&
+ addr >= ASYNC_BANK2_BASE && (addr + 2) <= (ASYNC_BANK2_BASE + ASYNC_BANK1_SIZE)) ||
+ (!(bfin_read_EBIU_AMBCTL1() & B3RDYEN) &&
+ addr >= ASYNC_BANK3_BASE && (addr + 2) <= (ASYNC_BANK3_BASE + ASYNC_BANK1_SIZE))) {
+ *val = *address;
+ return true;
+ }
+
+#if L1_CODE_LENGTH != 0
+ if (addr >= L1_CODE_START && (addr + 2) <= (L1_CODE_START + L1_CODE_LENGTH)) {
+ isram_memcpy(val, address, 2);
+ return true;
+ }
+#endif
+
+
+ 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
+ */
+#ifdef CONFIG_DEBUG_VERBOSE
+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 >= 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 >= 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
@@ -545,18 +713,25 @@ void dump_bfin_trace_buffer(void)
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;
@@ -568,7 +743,9 @@ void dump_bfin_trace_buffer(void)
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;
@@ -579,62 +756,159 @@ void dump_bfin_trace_buffer(void)
trace_buffer_restore(tflags);
#endif
+#endif
}
EXPORT_SYMBOL(dump_bfin_trace_buffer);
-static void show_trace(struct task_struct *tsk, unsigned long *sp)
+/*
+ * 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 long addr;
+ unsigned short opcode = 0, *ins_addr;
+ ins_addr = (unsigned short *)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);
- }
+ 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++);
+ addr = (unsigned int *)((unsigned int)stack & ~0x3F);
+
+ /* First thing is to look for a frame pointer */
+ for (addr = (unsigned int *)((unsigned int)stack & ~0xF), i = 0;
+ addr < endstack; addr++, i++) {
+ 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)
+ fp = (unsigned int *)*fp;
+ if (fp == 0 || fp == endstack) {
+ fp = addr - 1;
+ break;
+ }
+ fp = 0;
+ }
}
- printk("\n");
+ if (fp) {
+ frame = fp;
+ printk(" 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
+ */
- show_trace(task, stack);
+ /* 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("\n" 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
}
void dump_stack(void)
@@ -652,38 +926,39 @@ EXPORT_SYMBOL(dump_stack);
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)
- printk(KERN_EMERG "Kernel OOPS in progress\n");
+ verbose_printk(KERN_EMERG "Kernel OOPS in progress\n");
if (context & 0x0020 && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR)
- printk(KERN_NOTICE "HW Error context\n");
+ verbose_printk(KERN_NOTICE "HW Error context\n");
else if (context & 0x0020)
- printk(KERN_NOTICE "Deferred Exception context\n");
+ verbose_printk(KERN_NOTICE "Deferred Exception context\n");
else if (context & 0x3FC0)
- printk(KERN_NOTICE "Interrupt context\n");
+ verbose_printk(KERN_NOTICE "Interrupt context\n");
else if (context & 0x4000)
- printk(KERN_NOTICE "Deferred Interrupt context\n");
+ verbose_printk(KERN_NOTICE "Deferred Interrupt context\n");
else if (context & 0x8000)
- printk(KERN_NOTICE "Kernel process context\n");
+ 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) {
- printk(KERN_NOTICE "CURRENT PROCESS:\n");
+ verbose_printk(KERN_NOTICE "CURRENT PROCESS:\n");
if (current->comm >= (char *)FIXED_CODE_START)
- printk(KERN_NOTICE "COMM=%s PID=%d\n",
+ verbose_printk(KERN_NOTICE "COMM=%s PID=%d\n",
current->comm, current->pid);
else
- printk(KERN_NOTICE "COMM= invalid\n");
+ verbose_printk(KERN_NOTICE "COMM= invalid\n");
if (!((unsigned long)current->mm & 0x3) && (unsigned long)current->mm >= FIXED_CODE_START)
- printk(KERN_NOTICE "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n"
+ 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,
@@ -694,48 +969,40 @@ void dump_bfin_process(struct pt_regs *fp)
(void *)current->mm->brk,
(void *)current->mm->start_stack);
else
- printk(KERN_NOTICE "invalid mm\n");
+ verbose_printk(KERN_NOTICE "invalid mm\n");
} else
- printk(KERN_NOTICE "\n" KERN_NOTICE
+ verbose_printk(KERN_NOTICE "\n" 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;
- printk(KERN_NOTICE "return address: [0x%p]; contents of:", erraddr);
+ 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))
- printk("\n" KERN_NOTICE "0x%p: ", addr);
-
- if (get_user(val, addr)) {
- if (addr >= (unsigned short *)L1_CODE_START &&
- addr < (unsigned short *)(L1_CODE_START + L1_CODE_LENGTH)) {
- dma_memcpy(&val, addr, sizeof(val));
- sprintf(buf, "%04x", val);
- } else if (addr >= (unsigned short *)FIXED_CODE_START &&
- addr <= (unsigned short *)memory_start) {
- val = bfin_read16(addr);
- sprintf(buf, "%04x", val);
- } else {
+ verbose_printk("\n" KERN_NOTICE "0x%p: ", addr);
+
+ if (!get_instruction(&val, addr)) {
val = 0;
sprintf(buf, "????");
- }
} else
sprintf(buf, "%04x", val);
if (addr == erraddr) {
- printk("[%s]", buf);
+ verbose_printk("[%s]", buf);
err = val;
} else
- printk(" %s ", buf);
+ verbose_printk(" %s ", buf);
/* Do any previous instructions turn on interrupts? */
if (addr <= erraddr && /* in the past */
@@ -744,14 +1011,14 @@ void dump_bfin_mem(struct pt_regs *fp)
sti = 1;
}
- printk("\n");
+ verbose_printk("\n");
/* Hardware error interrupts can be deferred */
if (unlikely(sti && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR &&
oops_in_progress)){
- printk(KERN_NOTICE "Looks like this was a deferred error - sorry\n");
+ verbose_printk(KERN_NOTICE "Looks like this was a deferred error - sorry\n");
#ifndef CONFIG_DEBUG_HWERR
- printk(KERN_NOTICE "The remaining message may be meaningless\n"
+ verbose_printk(KERN_NOTICE "The remaining message may be meaningless\n"
KERN_NOTICE "You should enable CONFIG_DEBUG_HWERR to get a"
" better idea where it came from\n");
#else
@@ -765,34 +1032,47 @@ void dump_bfin_mem(struct pt_regs *fp)
/* 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) {
- printk(KERN_NOTICE "It might be better to look around here : \n");
- printk(KERN_NOTICE "-------------------------------------------\n");
+ verbose_printk(KERN_NOTICE "It might be better to look around here : \n");
+ verbose_printk(KERN_NOTICE "-------------------------------------------\n");
show_regs(fp + 1);
- printk(KERN_NOTICE "-------------------------------------------\n");
+ verbose_printk(KERN_NOTICE "-------------------------------------------\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;
- printk(KERN_NOTICE "\n" KERN_NOTICE "SEQUENCER STATUS:\t\t%s\n", print_tainted());
- printk(KERN_NOTICE " SEQSTAT: %08lx IPEND: %04lx SYSCFG: %04lx\n",
+ 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);
- printk(KERN_NOTICE " HWERRCAUSE: 0x%lx\n",
- (fp->seqstat & SEQSTAT_HWERRCAUSE) >> 14);
- printk(KERN_NOTICE " EXCAUSE : 0x%lx\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 = 6; i <= 15 ; i++) {
if (fp->ipend & (1 << i)) {
decode_address(buf, bfin_read32(EVT0 + 4*i));
- printk(KERN_NOTICE " physical IVG%i asserted : %s\n", i, buf);
+ verbose_printk(KERN_NOTICE " physical IVG%i asserted : %s\n", i, buf);
}
}
@@ -805,64 +1085,65 @@ void show_regs(struct pt_regs *fp)
goto unlock;
decode_address(buf, (unsigned int)action->handler);
- printk(KERN_NOTICE " logical irq %3d mapped : %s", i, buf);
+ 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);
- printk(", %s", buf);
+ verbose_printk(", %s", buf);
}
- printk("\n");
+ verbose_printk("\n");
unlock:
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);
+ verbose_printk(KERN_NOTICE " RETS: %s\n", buf);
decode_address(buf, fp->pc);
- printk(KERN_NOTICE " PC : %s\n", buf);
+ verbose_printk(KERN_NOTICE " PC : %s\n", buf);
if (((long)fp->seqstat & SEQSTAT_EXCAUSE) &&
(((long)fp->seqstat & SEQSTAT_EXCAUSE) != VEC_HWERR)) {
decode_address(buf, saved_dcplb_fault_addr);
- printk(KERN_NOTICE "DCPLB_FAULT_ADDR: %s\n", buf);
+ verbose_printk(KERN_NOTICE "DCPLB_FAULT_ADDR: %s\n", buf);
decode_address(buf, saved_icplb_fault_addr);
- printk(KERN_NOTICE "ICPLB_FAULT_ADDR: %s\n", buf);
+ 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 "\n" 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
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