summaryrefslogtreecommitdiffstats
path: root/arch/blackfin/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'arch/blackfin/kernel')
-rw-r--r--arch/blackfin/kernel/Makefile5
-rw-r--r--arch/blackfin/kernel/bfin_gpio.c131
-rw-r--r--arch/blackfin/kernel/bfin_ksyms.c12
-rw-r--r--arch/blackfin/kernel/dumpstack.c174
-rw-r--r--arch/blackfin/kernel/exception.c45
-rw-r--r--arch/blackfin/kernel/kgdb.c2
-rw-r--r--arch/blackfin/kernel/pseudodbg.c191
-rw-r--r--arch/blackfin/kernel/ptrace.c33
-rw-r--r--arch/blackfin/kernel/setup.c4
-rw-r--r--arch/blackfin/kernel/sys_bfin.c23
-rw-r--r--arch/blackfin/kernel/trace.c981
-rw-r--r--arch/blackfin/kernel/traps.c900
12 files changed, 1519 insertions, 982 deletions
diff --git a/arch/blackfin/kernel/Makefile b/arch/blackfin/kernel/Makefile
index 346a421f156..30d0d1f01dc 100644
--- a/arch/blackfin/kernel/Makefile
+++ b/arch/blackfin/kernel/Makefile
@@ -7,7 +7,8 @@ extra-y := init_task.o vmlinux.lds
obj-y := \
entry.o process.o bfin_ksyms.o ptrace.o setup.o signal.o \
sys_bfin.o traps.o irqchip.o dma-mapping.o flat.o \
- fixed_code.o reboot.o bfin_gpio.o bfin_dma_5xx.o
+ fixed_code.o reboot.o bfin_gpio.o bfin_dma_5xx.o \
+ exception.o dumpstack.o
ifeq ($(CONFIG_GENERIC_CLOCKEVENTS),y)
obj-y += time-ts.o
@@ -29,6 +30,8 @@ obj-$(CONFIG_NMI_WATCHDOG) += nmi.o
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-$(CONFIG_EARLY_PRINTK) += shadow_console.o
obj-$(CONFIG_STACKTRACE) += stacktrace.o
+obj-$(CONFIG_DEBUG_VERBOSE) += trace.o
+obj-$(CONFIG_BFIN_PSEUDODBG_INSNS) += pseudodbg.o
# the kgdb test puts code into L2 and without linker
# relaxation, we need to force long calls to/from it
diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c
index e35e20f00d9..42833ee2b30 100644
--- a/arch/blackfin/kernel/bfin_gpio.c
+++ b/arch/blackfin/kernel/bfin_gpio.c
@@ -475,9 +475,7 @@ GET_GPIO_P(maskb)
#ifdef CONFIG_PM
-
static unsigned short wakeup_map[GPIO_BANK_NUM];
-static unsigned char wakeup_flags_map[MAX_BLACKFIN_GPIOS];
static const unsigned int sic_iwr_irqs[] = {
#if defined(BF533_FAMILY)
@@ -514,112 +512,26 @@ static const unsigned int sic_iwr_irqs[] = {
*************************************************************
* MODIFICATION HISTORY :
**************************************************************/
-int gpio_pm_wakeup_request(unsigned gpio, unsigned char type)
-{
- unsigned long flags;
-
- if ((check_gpio(gpio) < 0) || !type)
- return -EINVAL;
-
- local_irq_save_hw(flags);
- wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio);
- wakeup_flags_map[gpio] = type;
- local_irq_restore_hw(flags);
-
- return 0;
-}
-EXPORT_SYMBOL(gpio_pm_wakeup_request);
-
-void gpio_pm_wakeup_free(unsigned gpio)
+int gpio_pm_wakeup_ctrl(unsigned gpio, unsigned ctrl)
{
unsigned long flags;
if (check_gpio(gpio) < 0)
- return;
+ return -EINVAL;
local_irq_save_hw(flags);
-
- wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
-
- local_irq_restore_hw(flags);
-}
-EXPORT_SYMBOL(gpio_pm_wakeup_free);
-
-static int bfin_gpio_wakeup_type(unsigned gpio, unsigned char type)
-{
- port_setup(gpio, GPIO_USAGE);
- set_gpio_dir(gpio, 0);
- set_gpio_inen(gpio, 1);
-
- if (type & (PM_WAKE_RISING | PM_WAKE_FALLING))
- set_gpio_edge(gpio, 1);
- else
- set_gpio_edge(gpio, 0);
-
- if ((type & (PM_WAKE_BOTH_EDGES)) == (PM_WAKE_BOTH_EDGES))
- set_gpio_both(gpio, 1);
+ if (ctrl)
+ wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio);
else
- set_gpio_both(gpio, 0);
-
- if ((type & (PM_WAKE_FALLING | PM_WAKE_LOW)))
- set_gpio_polar(gpio, 1);
- else
- set_gpio_polar(gpio, 0);
+ wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
- SSYNC();
-
- return 0;
-}
-
-u32 bfin_pm_standby_setup(void)
-{
- u16 bank, mask, i, gpio;
-
- for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
- mask = wakeup_map[gpio_bank(i)];
- bank = gpio_bank(i);
-
- gpio_bank_saved[bank].maskb = gpio_array[bank]->maskb;
- gpio_array[bank]->maskb = 0;
-
- if (mask) {
-#if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
- gpio_bank_saved[bank].fer = *port_fer[bank];
-#endif
- gpio_bank_saved[bank].inen = gpio_array[bank]->inen;
- gpio_bank_saved[bank].polar = gpio_array[bank]->polar;
- gpio_bank_saved[bank].dir = gpio_array[bank]->dir;
- gpio_bank_saved[bank].edge = gpio_array[bank]->edge;
- gpio_bank_saved[bank].both = gpio_array[bank]->both;
- gpio_bank_saved[bank].reserved =
- reserved_gpio_map[bank];
-
- gpio = i;
-
- while (mask) {
- if ((mask & 1) && (wakeup_flags_map[gpio] !=
- PM_WAKE_IGNORE)) {
- reserved_gpio_map[gpio_bank(gpio)] |=
- gpio_bit(gpio);
- bfin_gpio_wakeup_type(gpio,
- wakeup_flags_map[gpio]);
- set_gpio_data(gpio, 0); /*Clear*/
- }
- gpio++;
- mask >>= 1;
- }
-
- bfin_internal_set_wake(sic_iwr_irqs[bank], 1);
- gpio_array[bank]->maskb_set = wakeup_map[gpio_bank(i)];
- }
- }
-
- AWA_DUMMY_READ(maskb_set);
+ set_gpio_maskb(gpio, ctrl);
+ local_irq_restore_hw(flags);
return 0;
}
-void bfin_pm_standby_restore(void)
+int bfin_pm_standby_ctrl(unsigned ctrl)
{
u16 bank, mask, i;
@@ -627,24 +539,10 @@ void bfin_pm_standby_restore(void)
mask = wakeup_map[gpio_bank(i)];
bank = gpio_bank(i);
- if (mask) {
-#if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
- *port_fer[bank] = gpio_bank_saved[bank].fer;
-#endif
- gpio_array[bank]->inen = gpio_bank_saved[bank].inen;
- gpio_array[bank]->dir = gpio_bank_saved[bank].dir;
- gpio_array[bank]->polar = gpio_bank_saved[bank].polar;
- gpio_array[bank]->edge = gpio_bank_saved[bank].edge;
- gpio_array[bank]->both = gpio_bank_saved[bank].both;
-
- reserved_gpio_map[bank] =
- gpio_bank_saved[bank].reserved;
- bfin_internal_set_wake(sic_iwr_irqs[bank], 0);
- }
-
- gpio_array[bank]->maskb = gpio_bank_saved[bank].maskb;
+ if (mask)
+ bfin_internal_set_wake(sic_iwr_irqs[bank], ctrl);
}
- AWA_DUMMY_READ(maskb);
+ return 0;
}
void bfin_gpio_pm_hibernate_suspend(void)
@@ -708,16 +606,11 @@ void bfin_gpio_pm_hibernate_restore(void)
#else /* CONFIG_BF54x */
#ifdef CONFIG_PM
-u32 bfin_pm_standby_setup(void)
+int bfin_pm_standby_ctrl(unsigned ctrl)
{
return 0;
}
-void bfin_pm_standby_restore(void)
-{
-
-}
-
void bfin_gpio_pm_hibernate_suspend(void)
{
int i, bank;
diff --git a/arch/blackfin/kernel/bfin_ksyms.c b/arch/blackfin/kernel/bfin_ksyms.c
index ed8392c117e..2c264b51566 100644
--- a/arch/blackfin/kernel/bfin_ksyms.c
+++ b/arch/blackfin/kernel/bfin_ksyms.c
@@ -33,6 +33,18 @@ EXPORT_SYMBOL(memmove);
EXPORT_SYMBOL(memchr);
/*
+ * Because string functions are both inline and exported functions and
+ * folder arch/blackfin/lib is configured as a library path in Makefile,
+ * symbols exported in folder lib is not linked into built-in.o but
+ * inlined only. In order to export string symbols to kernel module
+ * properly, they should be exported here.
+ */
+EXPORT_SYMBOL(strcpy);
+EXPORT_SYMBOL(strncpy);
+EXPORT_SYMBOL(strcmp);
+EXPORT_SYMBOL(strncmp);
+
+/*
* libgcc functions - functions that are used internally by the
* compiler... (prototypes are not correct though, but that
* doesn't really matter since they're not versioned).
diff --git a/arch/blackfin/kernel/dumpstack.c b/arch/blackfin/kernel/dumpstack.c
new file mode 100644
index 00000000000..5cfbaa29821
--- /dev/null
+++ b/arch/blackfin/kernel/dumpstack.c
@@ -0,0 +1,174 @@
+/* Provide basic stack dumping functions
+ *
+ * Copyright 2004-2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later
+ */
+
+#include <linux/kernel.h>
+#include <linux/thread_info.h>
+#include <linux/mm.h>
+#include <linux/uaccess.h>
+#include <linux/module.h>
+#include <asm/trace.h>
+
+/*
+ * 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 int opcode;
+
+ if (!get_instruction(&opcode, addr))
+ return false;
+
+ if ((opcode >= 0x0060 && opcode <= 0x0067) ||
+ (opcode >= 0x0070 && opcode <= 0x0077) ||
+ (opcode >= 0xE3000000 && opcode <= 0xE3FFFFFF))
+ return true;
+
+ return false;
+
+}
+
+void show_stack(struct task_struct *task, unsigned long *stack)
+{
+#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;
+
+ /*
+ * 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 == NULL) {
+ if (task) {
+ /* We know this is a kernel stack, so this is the start/end */
+ stack = (unsigned long *)task->thread.ksp;
+ endstack = (unsigned int *)(((unsigned int)(stack) & ~(THREAD_SIZE - 1)) + THREAD_SIZE);
+ } else {
+ /* print out the existing stack info */
+ stack = (unsigned long *)&stack;
+ endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack);
+ }
+ } else
+ endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack);
+
+ printk(KERN_NOTICE "Stack info:\n");
+ decode_address(buf, (unsigned int)stack);
+ printk(KERN_NOTICE " SP: [0x%p] %s\n", stack, buf);
+
+ if (!access_ok(VERIFY_READ, stack, (unsigned int)endstack - (unsigned int)stack)) {
+ printk(KERN_NOTICE "Invalid stack pointer\n");
+ return;
+ }
+
+ /* 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;
+ }
+ }
+ if (fp) {
+ frame = fp;
+ printk(KERN_NOTICE " FP: (0x%p)\n", fp);
+ } else
+ frame = 0;
+
+ /*
+ * Now that we think we know where things are, we
+ * walk the stack again, this time printing things out
+ * incase there is no frame pointer, we still look for
+ * valid return addresses
+ */
+
+ /* First time print out data, next time, print out symbols */
+ for (j = 0; j <= 1; j++) {
+ if (j)
+ printk(KERN_NOTICE "Return addresses in stack:\n");
+ else
+ printk(KERN_NOTICE " Memory from 0x%08lx to %p", ((long unsigned int)stack & ~0xF), endstack);
+
+ fp = frame;
+ frame_no = 0;
+
+ for (addr = (unsigned int *)((unsigned int)stack & ~0xF), i = 0;
+ addr < endstack; addr++, i++) {
+
+ ret_addr = 0;
+ if (!j && i % 8 == 0)
+ printk(KERN_NOTICE "%p:", addr);
+
+ /* if it is an odd address, or zero, just skip it */
+ if (*addr & 0x1 || !*addr)
+ goto print;
+
+ ins_addr = (unsigned short *)*addr;
+
+ /* Go back one instruction, and see if it is a CALL */
+ ins_addr--;
+ ret_addr = is_bfin_call(ins_addr);
+ print:
+ if (!j && stack == (unsigned long *)addr)
+ printk("[%08x]", *addr);
+ else if (ret_addr)
+ if (j) {
+ decode_address(buf, (unsigned int)*addr);
+ if (frame == addr) {
+ printk(KERN_NOTICE " frame %2i : %s\n", frame_no, buf);
+ continue;
+ }
+ printk(KERN_NOTICE " address : %s\n", buf);
+ } else
+ printk("<%08x>", *addr);
+ else if (fp == addr) {
+ if (j)
+ frame = addr+1;
+ else
+ printk("(%08x)", *addr);
+
+ fp = (unsigned int *)*addr;
+ frame_no++;
+
+ } else if (!j)
+ printk(" %08x ", *addr);
+ }
+ if (!j)
+ printk("\n");
+ }
+#endif
+}
+EXPORT_SYMBOL(show_stack);
+
+void dump_stack(void)
+{
+ unsigned long stack;
+#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
+ int tflags;
+#endif
+ trace_buffer_save(tflags);
+ dump_bfin_trace_buffer();
+ show_stack(current, &stack);
+ trace_buffer_restore(tflags);
+}
+EXPORT_SYMBOL(dump_stack);
diff --git a/arch/blackfin/kernel/exception.c b/arch/blackfin/kernel/exception.c
new file mode 100644
index 00000000000..9208b5fd518
--- /dev/null
+++ b/arch/blackfin/kernel/exception.c
@@ -0,0 +1,45 @@
+/* Basic functions for adding/removing custom exception handlers
+ *
+ * Copyright 2004-2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later
+ */
+
+#include <linux/module.h>
+#include <asm/irq_handler.h>
+
+int bfin_request_exception(unsigned int exception, void (*handler)(void))
+{
+ void (*curr_handler)(void);
+
+ if (exception > 0x3F)
+ return -EINVAL;
+
+ curr_handler = ex_table[exception];
+
+ if (curr_handler != ex_replaceable)
+ return -EBUSY;
+
+ ex_table[exception] = handler;
+
+ return 0;
+}
+EXPORT_SYMBOL(bfin_request_exception);
+
+int bfin_free_exception(unsigned int exception, void (*handler)(void))
+{
+ void (*curr_handler)(void);
+
+ if (exception > 0x3F)
+ return -EINVAL;
+
+ curr_handler = ex_table[exception];
+
+ if (curr_handler != handler)
+ return -EBUSY;
+
+ ex_table[exception] = ex_replaceable;
+
+ return 0;
+}
+EXPORT_SYMBOL(bfin_free_exception);
diff --git a/arch/blackfin/kernel/kgdb.c b/arch/blackfin/kernel/kgdb.c
index 7367aea4ae5..08bc44ea688 100644
--- a/arch/blackfin/kernel/kgdb.c
+++ b/arch/blackfin/kernel/kgdb.c
@@ -66,7 +66,7 @@ void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)
gdb_regs[BFIN_RETN] = regs->retn;
gdb_regs[BFIN_RETE] = regs->rete;
gdb_regs[BFIN_PC] = regs->pc;
- gdb_regs[BFIN_CC] = 0;
+ gdb_regs[BFIN_CC] = (regs->astat >> 5) & 1;
gdb_regs[BFIN_EXTRA1] = 0;
gdb_regs[BFIN_EXTRA2] = 0;
gdb_regs[BFIN_EXTRA3] = 0;
diff --git a/arch/blackfin/kernel/pseudodbg.c b/arch/blackfin/kernel/pseudodbg.c
new file mode 100644
index 00000000000..db85bc94334
--- /dev/null
+++ b/arch/blackfin/kernel/pseudodbg.c
@@ -0,0 +1,191 @@
+/* The fake debug assert instructions
+ *
+ * Copyright 2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/ptrace.h>
+
+const char * const greg_names[] = {
+ "R0", "R1", "R2", "R3", "R4", "R5", "R6", "R7",
+ "P0", "P1", "P2", "P3", "P4", "P5", "SP", "FP",
+ "I0", "I1", "I2", "I3", "M0", "M1", "M2", "M3",
+ "B0", "B1", "B2", "B3", "L0", "L1", "L2", "L3",
+ "A0.X", "A0.W", "A1.X", "A1.W", "<res>", "<res>", "ASTAT", "RETS",
+ "<res>", "<res>", "<res>", "<res>", "<res>", "<res>", "<res>", "<res>",
+ "LC0", "LT0", "LB0", "LC1", "LT1", "LB1", "CYCLES", "CYCLES2",
+ "USP", "SEQSTAT", "SYSCFG", "RETI", "RETX", "RETN", "RETE", "EMUDAT",
+};
+
+static const char *get_allreg_name(int grp, int reg)
+{
+ return greg_names[(grp << 3) | reg];
+}
+
+/*
+ * Unfortunately, the pt_regs structure is not laid out the same way as the
+ * hardware register file, so we need to do some fix ups.
+ *
+ * CYCLES is not stored in the pt_regs structure - so, we just read it from
+ * the hardware.
+ *
+ * Don't support:
+ * - All reserved registers
+ * - All in group 7 are (supervisors only)
+ */
+
+static bool fix_up_reg(struct pt_regs *fp, long *value, int grp, int reg)
+{
+ long *val = &fp->r0;
+ unsigned long tmp;
+
+ /* Only do Dregs and Pregs for now */
+ if (grp == 5 ||
+ (grp == 4 && (reg == 4 || reg == 5)) ||
+ (grp == 7))
+ return false;
+
+ if (grp == 0 || (grp == 1 && reg < 6))
+ val -= (reg + 8 * grp);
+ else if (grp == 1 && reg == 6)
+ val = &fp->usp;
+ else if (grp == 1 && reg == 7)
+ val = &fp->fp;
+ else if (grp == 2) {
+ val = &fp->i0;
+ val -= reg;
+ } else if (grp == 3 && reg >= 4) {
+ val = &fp->l0;
+ val -= (reg - 4);
+ } else if (grp == 3 && reg < 4) {
+ val = &fp->b0;
+ val -= reg;
+ } else if (grp == 4 && reg < 4) {
+ val = &fp->a0x;
+ val -= reg;
+ } else if (grp == 4 && reg == 6)
+ val = &fp->astat;
+ else if (grp == 4 && reg == 7)
+ val = &fp->rets;
+ else if (grp == 6 && reg < 6) {
+ val = &fp->lc0;
+ val -= reg;
+ } else if (grp == 6 && reg == 6) {
+ __asm__ __volatile__("%0 = cycles;\n" : "=d"(tmp));
+ val = &tmp;
+ } else if (grp == 6 && reg == 7) {
+ __asm__ __volatile__("%0 = cycles2;\n" : "=d"(tmp));
+ val = &tmp;
+ }
+
+ *value = *val;
+ return true;
+
+}
+
+#define PseudoDbg_Assert_opcode 0xf0000000
+#define PseudoDbg_Assert_expected_bits 0
+#define PseudoDbg_Assert_expected_mask 0xffff
+#define PseudoDbg_Assert_regtest_bits 16
+#define PseudoDbg_Assert_regtest_mask 0x7
+#define PseudoDbg_Assert_grp_bits 19
+#define PseudoDbg_Assert_grp_mask 0x7
+#define PseudoDbg_Assert_dbgop_bits 22
+#define PseudoDbg_Assert_dbgop_mask 0x3
+#define PseudoDbg_Assert_dontcare_bits 24
+#define PseudoDbg_Assert_dontcare_mask 0x7
+#define PseudoDbg_Assert_code_bits 27
+#define PseudoDbg_Assert_code_mask 0x1f
+
+/*
+ * DBGA - debug assert
+ */
+bool execute_pseudodbg_assert(struct pt_regs *fp, unsigned int opcode)
+{
+ int expected = ((opcode >> PseudoDbg_Assert_expected_bits) & PseudoDbg_Assert_expected_mask);
+ int dbgop = ((opcode >> (PseudoDbg_Assert_dbgop_bits)) & PseudoDbg_Assert_dbgop_mask);
+ int grp = ((opcode >> (PseudoDbg_Assert_grp_bits)) & PseudoDbg_Assert_grp_mask);
+ int regtest = ((opcode >> (PseudoDbg_Assert_regtest_bits)) & PseudoDbg_Assert_regtest_mask);
+ long value;
+
+ if ((opcode & 0xFF000000) != PseudoDbg_Assert_opcode)
+ return false;
+
+ if (!fix_up_reg(fp, &value, grp, regtest))
+ return false;
+
+ if (dbgop == 0 || dbgop == 2) {
+ /* DBGA ( regs_lo , uimm16 ) */
+ /* DBGAL ( regs , uimm16 ) */
+ if (expected != (value & 0xFFFF)) {
+ pr_notice("DBGA (%s.L,0x%x) failure, got 0x%x\n",
+ get_allreg_name(grp, regtest),
+ expected, (unsigned int)(value & 0xFFFF));
+ return false;
+ }
+
+ } else if (dbgop == 1 || dbgop == 3) {
+ /* DBGA ( regs_hi , uimm16 ) */
+ /* DBGAH ( regs , uimm16 ) */
+ if (expected != ((value >> 16) & 0xFFFF)) {
+ pr_notice("DBGA (%s.H,0x%x) failure, got 0x%x\n",
+ get_allreg_name(grp, regtest),
+ expected, (unsigned int)((value >> 16) & 0xFFFF));
+ return false;
+ }
+ }
+
+ fp->pc += 4;
+ return true;
+}
+
+#define PseudoDbg_opcode 0xf8000000
+#define PseudoDbg_reg_bits 0
+#define PseudoDbg_reg_mask 0x7
+#define PseudoDbg_grp_bits 3
+#define PseudoDbg_grp_mask 0x7
+#define PseudoDbg_fn_bits 6
+#define PseudoDbg_fn_mask 0x3
+#define PseudoDbg_code_bits 8
+#define PseudoDbg_code_mask 0xff
+
+/*
+ * DBG - debug (dump a register value out)
+ */
+bool execute_pseudodbg(struct pt_regs *fp, unsigned int opcode)
+{
+ int grp, fn, reg;
+ long value, value1;
+
+ if ((opcode & 0xFF000000) != PseudoDbg_opcode)
+ return false;
+
+ opcode >>= 16;
+ grp = ((opcode >> PseudoDbg_grp_bits) & PseudoDbg_reg_mask);
+ fn = ((opcode >> PseudoDbg_fn_bits) & PseudoDbg_fn_mask);
+ reg = ((opcode >> PseudoDbg_reg_bits) & PseudoDbg_reg_mask);
+
+ if (fn == 3 && (reg == 0 || reg == 1)) {
+ if (!fix_up_reg(fp, &value, 4, 2 * reg))
+ return false;
+ if (!fix_up_reg(fp, &value1, 4, 2 * reg + 1))
+ return false;
+
+ pr_notice("DBG A%i = %02lx%08lx\n", reg, value & 0xFF, value1);
+ fp->pc += 2;
+ return true;
+
+ } else if (fn == 0) {
+ if (!fix_up_reg(fp, &value, grp, reg))
+ return false;
+
+ pr_notice("DBG %s = %08lx\n", get_allreg_name(grp, reg), value);
+ fp->pc += 2;
+ return true;
+ }
+
+ return false;
+}
diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c
index 43eb969405d..6ec77685df5 100644
--- a/arch/blackfin/kernel/ptrace.c
+++ b/arch/blackfin/kernel/ptrace.c
@@ -292,28 +292,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
break;
}
-#ifdef CONFIG_BINFMT_ELF_FDPIC
- case PTRACE_GETFDPIC: {
- unsigned long tmp = 0;
-
- switch (addr) {
- case_PTRACE_GETFDPIC_EXEC:
- case PTRACE_GETFDPIC_EXEC:
- tmp = child->mm->context.exec_fdpic_loadmap;
- break;
- case_PTRACE_GETFDPIC_INTERP:
- case PTRACE_GETFDPIC_INTERP:
- tmp = child->mm->context.interp_fdpic_loadmap;
- break;
- default:
- break;
- }
-
- ret = put_user(tmp, datap);
- break;
- }
-#endif
-
/* when I and D space are separate, this will have to be fixed. */
case PTRACE_POKEDATA:
pr_debug("ptrace: PTRACE_PEEKDATA\n");
@@ -357,8 +335,14 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
case PTRACE_PEEKUSR:
switch (addr) {
#ifdef CONFIG_BINFMT_ELF_FDPIC /* backwards compat */
- case PT_FDPIC_EXEC: goto case_PTRACE_GETFDPIC_EXEC;
- case PT_FDPIC_INTERP: goto case_PTRACE_GETFDPIC_INTERP;
+ case PT_FDPIC_EXEC:
+ request = PTRACE_GETFDPIC;
+ addr = PTRACE_GETFDPIC_EXEC;
+ goto case_default;
+ case PT_FDPIC_INTERP:
+ request = PTRACE_GETFDPIC;
+ addr = PTRACE_GETFDPIC_INTERP;
+ goto case_default;
#endif
default:
ret = get_reg(child, addr, datap);
@@ -385,6 +369,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
0, sizeof(struct pt_regs),
(const void __user *)data);
+ case_default:
default:
ret = ptrace_request(child, request, addr, data);
break;
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index 8e2efceb364..d37a397f43f 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -1,5 +1,5 @@
/*
- * Copyright 2004-2009 Analog Devices Inc.
+ * Copyright 2004-2010 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
@@ -925,7 +925,7 @@ void __init setup_arch(char **cmdline_p)
else if (_bfin_swrst & RESET_SOFTWARE)
printk(KERN_NOTICE "Reset caused by Software reset\n");
- printk(KERN_INFO "Blackfin support (C) 2004-2009 Analog Devices, Inc.\n");
+ printk(KERN_INFO "Blackfin support (C) 2004-2010 Analog Devices, Inc.\n");
if (bfin_compiled_revid() == 0xffff)
printk(KERN_INFO "Compiled for ADSP-%s Rev any, running on 0.%d\n", CPU, bfin_revid());
else if (bfin_compiled_revid() == -1)
diff --git a/arch/blackfin/kernel/sys_bfin.c b/arch/blackfin/kernel/sys_bfin.c
index 2e7f8e10bf8..bdc1e2f0da3 100644
--- a/arch/blackfin/kernel/sys_bfin.c
+++ b/arch/blackfin/kernel/sys_bfin.c
@@ -47,3 +47,26 @@ unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr,
}
EXPORT_SYMBOL(get_fb_unmapped_area);
#endif
+
+/* Needed for legacy userspace atomic emulation */
+static DEFINE_SPINLOCK(bfin_spinlock_lock);
+
+#ifdef CONFIG_SYS_BFIN_SPINLOCK_L1
+__attribute__((l1_text))
+#endif
+asmlinkage int sys_bfin_spinlock(int *p)
+{
+ int ret, tmp = 0;
+
+ 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;
+ else
+ put_user(1, p);
+ }
+ spin_unlock(&bfin_spinlock_lock);
+
+ return ret;
+}
diff --git a/arch/blackfin/kernel/trace.c b/arch/blackfin/kernel/trace.c
new file mode 100644
index 00000000000..59fcdf6b013
--- /dev/null
+++ b/arch/blackfin/kernel/trace.c
@@ -0,0 +1,981 @@
+/* provide some functions which dump the trace buffer, in a nice way for people
+ * to read it, and understand what is going on
+ *
+ * Copyright 2004-2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later
+ */
+
+#include <linux/kernel.h>
+#include <linux/hardirq.h>
+#include <linux/thread_info.h>
+#include <linux/mm.h>
+#include <linux/uaccess.h>
+#include <linux/module.h>
+#include <linux/kallsyms.h>
+#include <linux/err.h>
+#include <linux/fs.h>
+#include <asm/dma.h>
+#include <asm/trace.h>
+#include <asm/fixed_code.h>
+#include <asm/traps.h>
+#include <asm/irq_handler.h>
+
+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
+ /* 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, "{ %s%s%s%s + 0x%lx }",
+ delim, modname, delim, symname,
+ (unsigned long)offset);
+ return;
+ }
+#endif
+
+ if (address >= FIXED_CODE_START && address < FIXED_CODE_END) {
+ /* Problem in fixed code section? */
+ strcat(buf, "/* Maybe fixed code section */");
+ return;
+
+ } else if (address < CONFIG_BOOT_LOAD) {
+ /* Problem somewhere before the kernel start address */
+ strcat(buf, "/* Maybe null pointer? */");
+ return;
+
+ } else if (address >= COREMMR_BASE) {
+ strcat(buf, "/* core mmrs */");
+ return;
+
+ } else if (address >= SYSMMR_BASE) {
+ strcat(buf, "/* system mmrs */");
+ return;
+
+ } else if (address >= L1_ROM_START && address < L1_ROM_START + L1_ROM_LENGTH) {
+ strcat(buf, "/* on-chip L1 ROM */");
+ return;
+
+ } 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;
+ }
+
+ /*
+ * Don't walk any of the vmas if we are oopsing, it has been known
+ * to cause problems - corrupt vmas (kernel crashes) cause double faults
+ */
+ if (oops_in_progress) {
+ strcat(buf, "/* kernel dynamic memory (maybe user-space) */");
+ 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;
+
+ 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;
+ }
+
+ /* 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, "[ %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);
+ }
+
+ /*
+ * we were unable to find this address anywhere,
+ * or some MMs were skipped because they were in use.
+ */
+ sprintf(buf, "/* kernel dynamic memory */");
+
+done:
+ write_unlock_irqrestore(&tasklist_lock, flags);
+}
+
+#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
+ */
+bool get_mem16(unsigned short *val, unsigned short *address)
+{
+ unsigned long addr = (unsigned long)address;
+
+ /* Check for odd addresses */
+ if (addr & 0x1)
+ 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;
+ }
+}
+
+bool get_instruction(unsigned int *val, unsigned short *address)
+{
+ unsigned long addr = (unsigned long)address;
+ unsigned short opcode0, opcode1;
+
+ /* Check for odd addresses */
+ if (addr & 0x1)
+ return false;
+
+ /* MMR region will never have instructions */
+ if (addr >= SYSMMR_BASE)
+ return false;
+
+ /* Scratchpad will never have instructions */
+ if (addr >= L1_SCRATCH_START && addr < L1_SCRATCH_START + L1_SCRATCH_LENGTH)
+ return false;
+
+ /* Data banks will never have instructions */
+ if (addr >= BOOT_ROM_START + BOOT_ROM_LENGTH && addr < L1_CODE_START)
+ return false;
+
+ if (!get_mem16(&opcode0, address))
+ return false;
+
+ /* was this a 32-bit instruction? If so, get the next 16 bits */
+ if ((opcode0 & 0xc000) == 0xc000) {
+ if (!get_mem16(&opcode1, address + 1))
+ return false;
+ *val = (opcode0 << 16) + opcode1;
+ } else
+ *val = opcode0;
+
+ return true;
+}
+
+#if defined(CONFIG_DEBUG_BFIN_HWTRACE_ON)
+/*
+ * decode the instruction if we are printing out the trace, as it
+ * makes things easier to follow, without running it through objdump
+ * Decode the change of flow, and the common load/store instructions
+ * which are the main cause for faults, and discontinuities in the trace
+ * buffer.
+ */
+
+#define ProgCtrl_opcode 0x0000
+#define ProgCtrl_poprnd_bits 0
+#define ProgCtrl_poprnd_mask 0xf
+#define ProgCtrl_prgfunc_bits 4
+#define ProgCtrl_prgfunc_mask 0xf
+#define ProgCtrl_code_bits 8
+#define ProgCtrl_code_mask 0xff
+
+static void decode_ProgCtrl_0(unsigned int opcode)
+{
+ int poprnd = ((opcode >> ProgCtrl_poprnd_bits) & ProgCtrl_poprnd_mask);
+ int prgfunc = ((opcode >> ProgCtrl_prgfunc_bits) & ProgCtrl_prgfunc_mask);
+
+ if (prgfunc == 0 && poprnd == 0)
+ pr_cont("NOP");
+ else if (prgfunc == 1 && poprnd == 0)
+ pr_cont("RTS");
+ else if (prgfunc == 1 && poprnd == 1)
+ pr_cont("RTI");
+ else if (prgfunc == 1 && poprnd == 2)
+ pr_cont("RTX");
+ else if (prgfunc == 1 && poprnd == 3)
+ pr_cont("RTN");
+ else if (prgfunc == 1 && poprnd == 4)
+ pr_cont("RTE");
+ else if (prgfunc == 2 && poprnd == 0)
+ pr_cont("IDLE");
+ else if (prgfunc == 2 && poprnd == 3)
+ pr_cont("CSYNC");
+ else if (prgfunc == 2 && poprnd == 4)
+ pr_cont("SSYNC");
+ else if (prgfunc == 2 && poprnd == 5)
+ pr_cont("EMUEXCPT");
+ else if (prgfunc == 3)
+ pr_cont("CLI R%i", poprnd);
+ else if (prgfunc == 4)
+ pr_cont("STI R%i", poprnd);
+ else if (prgfunc == 5)
+ pr_cont("JUMP (P%i)", poprnd);
+ else if (prgfunc == 6)
+ pr_cont("CALL (P%i)", poprnd);
+ else if (prgfunc == 7)
+ pr_cont("CALL (PC + P%i)", poprnd);
+ else if (prgfunc == 8)
+ pr_cont("JUMP (PC + P%i", poprnd);
+ else if (prgfunc == 9)
+ pr_cont("RAISE %i", poprnd);
+ else if (prgfunc == 10)
+ pr_cont("EXCPT %i", poprnd);
+ else
+ pr_cont("0x%04x", opcode);
+
+}
+
+#define BRCC_opcode 0x1000
+#define BRCC_offset_bits 0
+#define BRCC_offset_mask 0x3ff
+#define BRCC_B_bits 10
+#define BRCC_B_mask 0x1
+#define BRCC_T_bits 11
+#define BRCC_T_mask 0x1
+#define BRCC_code_bits 12
+#define BRCC_code_mask 0xf
+
+static void decode_BRCC_0(unsigned int opcode)
+{
+ int B = ((opcode >> BRCC_B_bits) & BRCC_B_mask);
+ int T = ((opcode >> BRCC_T_bits) & BRCC_T_mask);
+
+ pr_cont("IF %sCC JUMP pcrel %s", T ? "" : "!", B ? "(BP)" : "");
+}
+
+#define CALLa_opcode 0xe2000000
+#define CALLa_addr_bits 0
+#define CALLa_addr_mask 0xffffff
+#define CALLa_S_bits 24
+#define CALLa_S_mask 0x1
+#define CALLa_code_bits 25
+#define CALLa_code_mask 0x7f
+
+static void decode_CALLa_0(unsigned int opcode)
+{
+ int S = ((opcode >> (CALLa_S_bits - 16)) & CALLa_S_mask);
+
+ if (S)
+ pr_cont("CALL pcrel");
+ else
+ pr_cont("JUMP.L");
+}
+
+#define LoopSetup_opcode 0xe0800000
+#define LoopSetup_eoffset_bits 0
+#define LoopSetup_eoffset_mask 0x3ff
+#define LoopSetup_dontcare_bits 10
+#define LoopSetup_dontcare_mask 0x3
+#define LoopSetup_reg_bits 12
+#define LoopSetup_reg_mask 0xf
+#define LoopSetup_soffset_bits 16
+#define LoopSetup_soffset_mask 0xf
+#define LoopSetup_c_bits 20
+#define LoopSetup_c_mask 0x1
+#define LoopSetup_rop_bits 21
+#define LoopSetup_rop_mask 0x3
+#define LoopSetup_code_bits 23
+#define LoopSetup_code_mask 0x1ff
+
+static void decode_LoopSetup_0(unsigned int opcode)
+{
+ int c = ((opcode >> LoopSetup_c_bits) & LoopSetup_c_mask);
+ int reg = ((opcode >> LoopSetup_reg_bits) & LoopSetup_reg_mask);
+ int rop = ((opcode >> LoopSetup_rop_bits) & LoopSetup_rop_mask);
+
+ pr_cont("LSETUP <> LC%i", c);
+ if ((rop & 1) == 1)
+ pr_cont("= P%i", reg);
+ if ((rop & 2) == 2)
+ pr_cont(" >> 0x1");
+}
+
+#define DspLDST_opcode 0x9c00
+#define DspLDST_reg_bits 0
+#define DspLDST_reg_mask 0x7
+#define DspLDST_i_bits 3
+#define DspLDST_i_mask 0x3
+#define DspLDST_m_bits 5
+#define DspLDST_m_mask 0x3
+#define DspLDST_aop_bits 7
+#define DspLDST_aop_mask 0x3
+#define DspLDST_W_bits 9
+#define DspLDST_W_mask 0x1
+#define DspLDST_code_bits 10
+#define DspLDST_code_mask 0x3f
+
+static void decode_dspLDST_0(unsigned int opcode)
+{
+ int i = ((opcode >> DspLDST_i_bits) & DspLDST_i_mask);
+ int m = ((opcode >> DspLDST_m_bits) & DspLDST_m_mask);
+ int W = ((opcode >> DspLDST_W_bits) & DspLDST_W_mask);
+ int aop = ((opcode >> DspLDST_aop_bits) & DspLDST_aop_mask);
+ int reg = ((opcode >> DspLDST_reg_bits) & DspLDST_reg_mask);
+
+ if (W == 0) {
+ pr_cont("R%i", reg);
+ switch (m) {
+ case 0:
+ pr_cont(" = ");
+ break;
+ case 1:
+ pr_cont(".L = ");
+ break;
+ case 2:
+ pr_cont(".W = ");
+ break;
+ }
+ }
+
+ pr_cont("[ I%i", i);
+
+ switch (aop) {
+ case 0:
+ pr_cont("++ ]");
+ break;
+ case 1:
+ pr_cont("-- ]");
+ break;
+ }
+
+ if (W == 1) {
+ pr_cont(" = R%i", reg);
+ switch (m) {
+ case 1:
+ pr_cont(".L = ");
+ break;
+ case 2:
+ pr_cont(".W = ");
+ break;
+ }
+ }
+}
+
+#define LDST_opcode 0x9000
+#define LDST_reg_bits 0
+#define LDST_reg_mask 0x7
+#define LDST_ptr_bits 3
+#define LDST_ptr_mask 0x7
+#define LDST_Z_bits 6
+#define LDST_Z_mask 0x1
+#define LDST_aop_bits 7
+#define LDST_aop_mask 0x3
+#define LDST_W_bits 9
+#define LDST_W_mask 0x1
+#define LDST_sz_bits 10
+#define LDST_sz_mask 0x3
+#define LDST_code_bits 12
+#define LDST_code_mask 0xf
+
+static void decode_LDST_0(unsigned int opcode)
+{
+ int Z = ((opcode >> LDST_Z_bits) & LDST_Z_mask);
+ int W = ((opcode >> LDST_W_bits) & LDST_W_mask);
+ int sz = ((opcode >> LDST_sz_bits) & LDST_sz_mask);
+ int aop = ((opcode >> LDST_aop_bits) & LDST_aop_mask);
+ int reg = ((opcode >> LDST_reg_bits) & LDST_reg_mask);
+ int ptr = ((opcode >> LDST_ptr_bits) & LDST_ptr_mask);
+
+ if (W == 0)
+ pr_cont("%s%i = ", (sz == 0 && Z == 1) ? "P" : "R", reg);
+
+ switch (sz) {
+ case 1:
+ pr_cont("W");
+ break;
+ case 2:
+ pr_cont("B");
+ break;
+ }
+
+ pr_cont("[P%i", ptr);
+
+ switch (aop) {
+ case 0:
+ pr_cont("++");
+ break;
+ case 1:
+ pr_cont("--");
+ break;
+ }
+ pr_cont("]");
+
+ if (W == 1)
+ pr_cont(" = %s%i ", (sz == 0 && Z == 1) ? "P" : "R", reg);
+
+ if (sz) {
+ if (Z)
+ pr_cont(" (X)");
+ else
+ pr_cont(" (Z)");
+ }
+}
+
+#define LDSTii_opcode 0xa000
+#define LDSTii_reg_bit 0
+#define LDSTii_reg_mask 0x7
+#define LDSTii_ptr_bit 3
+#define LDSTii_ptr_mask 0x7
+#define LDSTii_offset_bit 6
+#define LDSTii_offset_mask 0xf
+#define LDSTii_op_bit 10
+#define LDSTii_op_mask 0x3
+#define LDSTii_W_bit 12
+#define LDSTii_W_mask 0x1
+#define LDSTii_code_bit 13
+#define LDSTii_code_mask 0x7
+
+static void decode_LDSTii_0(unsigned int opcode)
+{
+ int reg = ((opcode >> LDSTii_reg_bit) & LDSTii_reg_mask);
+ int ptr = ((opcode >> LDSTii_ptr_bit) & LDSTii_ptr_mask);
+ int offset = ((opcode >> LDSTii_offset_bit) & LDSTii_offset_mask);
+ int op = ((opcode >> LDSTii_op_bit) & LDSTii_op_mask);
+ int W = ((opcode >> LDSTii_W_bit) & LDSTii_W_mask);
+
+ if (W == 0) {
+ pr_cont("%s%i = %s[P%i + %i]", op == 3 ? "R" : "P", reg,
+ op == 1 || op == 2 ? "" : "W", ptr, offset);
+ if (op == 2)
+ pr_cont("(Z)");
+ if (op == 3)
+ pr_cont("(X)");
+ } else {
+ pr_cont("%s[P%i + %i] = %s%i", op == 0 ? "" : "W", ptr,
+ offset, op == 3 ? "P" : "R", reg);
+ }
+}
+
+#define LDSTidxI_opcode 0xe4000000
+#define LDSTidxI_offset_bits 0
+#define LDSTidxI_offset_mask 0xffff
+#define LDSTidxI_reg_bits 16
+#define LDSTidxI_reg_mask 0x7
+#define LDSTidxI_ptr_bits 19
+#define LDSTidxI_ptr_mask 0x7
+#define LDSTidxI_sz_bits 22
+#define LDSTidxI_sz_mask 0x3
+#define LDSTidxI_Z_bits 24
+#define LDSTidxI_Z_mask 0x1
+#define LDSTidxI_W_bits 25
+#define LDSTidxI_W_mask 0x1
+#define LDSTidxI_code_bits 26
+#define LDSTidxI_code_mask 0x3f
+
+static void decode_LDSTidxI_0(unsigned int opcode)
+{
+ int Z = ((opcode >> LDSTidxI_Z_bits) & LDSTidxI_Z_mask);
+ int W = ((opcode >> LDSTidxI_W_bits) & LDSTidxI_W_mask);
+ int sz = ((opcode >> LDSTidxI_sz_bits) & LDSTidxI_sz_mask);
+ int reg = ((opcode >> LDSTidxI_reg_bits) & LDSTidxI_reg_mask);
+ int ptr = ((opcode >> LDSTidxI_ptr_bits) & LDSTidxI_ptr_mask);
+ int offset = ((opcode >> LDSTidxI_offset_bits) & LDSTidxI_offset_mask);
+
+ if (W == 0)
+ pr_cont("%s%i = ", sz == 0 && Z == 1 ? "P" : "R", reg);
+
+ if (sz == 1)
+ pr_cont("W");
+ if (sz == 2)
+ pr_cont("B");
+
+ pr_cont("[P%i + %s0x%x]", ptr, offset & 0x20 ? "-" : "",
+ (offset & 0x1f) << 2);
+
+ if (W == 0 && sz != 0) {
+ if (Z)
+ pr_cont("(X)");
+ else
+ pr_cont("(Z)");
+ }
+
+ if (W == 1)
+ pr_cont("= %s%i", (sz == 0 && Z == 1) ? "P" : "R", reg);
+
+}
+
+static void decode_opcode(unsigned int opcode)
+{
+#ifdef CONFIG_BUG
+ if (opcode == BFIN_BUG_OPCODE)
+ pr_cont("BUG");
+ else
+#endif
+ if ((opcode & 0xffffff00) == ProgCtrl_opcode)
+ decode_ProgCtrl_0(opcode);
+ else if ((opcode & 0xfffff000) == BRCC_opcode)
+ decode_BRCC_0(opcode);
+ else if ((opcode & 0xfffff000) == 0x2000)
+ pr_cont("JUMP.S");
+ else if ((opcode & 0xfe000000) == CALLa_opcode)
+ decode_CALLa_0(opcode);
+ else if ((opcode & 0xff8000C0) == LoopSetup_opcode)
+ decode_LoopSetup_0(opcode);
+ else if ((opcode & 0xfffffc00) == DspLDST_opcode)
+ decode_dspLDST_0(opcode);
+ else if ((opcode & 0xfffff000) == LDST_opcode)
+ decode_LDST_0(opcode);
+ else if ((opcode & 0xffffe000) == LDSTii_opcode)
+ decode_LDSTii_0(opcode);
+ else if ((opcode & 0xfc000000) == LDSTidxI_opcode)
+ decode_LDSTidxI_0(opcode);
+ else if (opcode & 0xffff0000)
+ pr_cont("0x%08x", opcode);
+ else
+ pr_cont("0x%04x", opcode);
+}
+
+#define BIT_MULTI_INS 0x08000000
+static void decode_instruction(unsigned short *address)
+{
+ unsigned int opcode;
+
+ if (!get_instruction(&opcode, address))
+ return;
+
+ decode_opcode(opcode);
+
+ /* If things are a 32-bit instruction, it has the possibility of being
+ * a multi-issue instruction (a 32-bit, and 2 16 bit instrucitions)
+ * This test collidates with the unlink instruction, so disallow that
+ */
+ if ((opcode & 0xc0000000) == 0xc0000000 &&
+ (opcode & BIT_MULTI_INS) &&
+ (opcode & 0xe8000000) != 0xe8000000) {
+ pr_cont(" || ");
+ if (!get_instruction(&opcode, address + 2))
+ return;
+ decode_opcode(opcode);
+ pr_cont(" || ");
+ if (!get_instruction(&opcode, address + 3))
+ return;
+ decode_opcode(opcode);
+ }
+}
+#endif
+
+void dump_bfin_trace_buffer(void)
+{
+#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
+ int tflags, i = 0, fault = 0;
+ char buf[150];
+ unsigned short *addr;
+ unsigned int cpu = raw_smp_processor_id();
+#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
+ int j, index;
+#endif
+
+ trace_buffer_save(tflags);
+
+ pr_notice("Hardware Trace:\n");
+
+#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
+ pr_notice("WARNING: Expanded trace turned on - can not trace exceptions\n");
+#endif
+
+ if (likely(bfin_read_TBUFSTAT() & TBUFCNT)) {
+ for (; bfin_read_TBUFSTAT() & TBUFCNT; i++) {
+ addr = (unsigned short *)bfin_read_TBUF();
+ decode_address(buf, (unsigned long)addr);
+ pr_notice("%4i Target : %s\n", i, buf);
+ /* Normally, the faulting instruction doesn't go into
+ * the trace buffer, (since it doesn't commit), so
+ * we print out the fault address here
+ */
+ if (!fault && addr == ((unsigned short *)evt_ivhw)) {
+ addr = (unsigned short *)bfin_read_TBUF();
+ decode_address(buf, (unsigned long)addr);
+ pr_notice(" FAULT : %s ", buf);
+ decode_instruction(addr);
+ pr_cont("\n");
+ fault = 1;
+ continue;
+ }
+ if (!fault && addr == (unsigned short *)trap &&
+ (cpu_pda[cpu].seqstat & SEQSTAT_EXCAUSE) > VEC_EXCPT15) {
+ decode_address(buf, cpu_pda[cpu].icplb_fault_addr);
+ pr_notice(" FAULT : %s ", buf);
+ decode_instruction((unsigned short *)cpu_pda[cpu].icplb_fault_addr);
+ pr_cont("\n");
+ fault = 1;
+ }
+ addr = (unsigned short *)bfin_read_TBUF();
+ decode_address(buf, (unsigned long)addr);
+ pr_notice(" Source : %s ", buf);
+ decode_instruction(addr);
+ pr_cont("\n");
+ }
+ }
+
+#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
+ if (trace_buff_offset)
+ index = trace_buff_offset / 4;
+ else
+ index = EXPAND_LEN;
+
+ j = (1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN) * 128;
+ while (j) {
+ decode_address(buf, software_trace_buff[index]);
+ pr_notice("%4i Target : %s\n", i, buf);
+ index -= 1;
+ if (index < 0)
+ index = EXPAND_LEN;
+ decode_address(buf, software_trace_buff[index]);
+ pr_notice(" Source : %s ", buf);
+ decode_instruction((unsigned short *)software_trace_buff[index]);
+ pr_cont("\n");
+ index -= 1;
+ if (index < 0)
+ index = EXPAND_LEN;
+ j--;
+ i++;
+ }
+#endif
+
+ trace_buffer_restore(tflags);
+#endif
+}
+EXPORT_SYMBOL(dump_bfin_trace_buffer);
+
+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)
+ 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");
+
+ /* 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) {
+ 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_mem(struct pt_regs *fp)
+{
+ unsigned short *addr, *erraddr, val = 0, err = 0;
+ char sti = 0, buf[6];
+
+ erraddr = (void *)fp->pc;
+
+ pr_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))
+ pr_notice("0x%p: ", addr);
+
+ if (!get_mem16(&val, addr)) {
+ val = 0;
+ sprintf(buf, "????");
+ } else
+ sprintf(buf, "%04x", val);
+
+ if (addr == erraddr) {
+ pr_cont("[%s]", buf);
+ err = val;
+ } else
+ pr_cont(" %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;
+ }
+
+ pr_cont("\n");
+
+ /* Hardware error interrupts can be deferred */
+ if (unlikely(sti && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR &&
+ oops_in_progress)){
+ pr_notice("Looks like this was a deferred error - sorry\n");
+#ifndef CONFIG_DEBUG_HWERR
+ pr_notice("The remaining message may be meaningless\n");
+ pr_notice("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) {
+ pr_notice("It might be better to look around here :\n");
+ pr_notice("-------------------------------------------\n");
+ show_regs(fp + 1);
+ pr_notice("-------------------------------------------\n");
+ }
+ }
+#endif
+ }
+}
+
+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
+ );
+
+ 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 the error was from the EBIU, print it out */
+ 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
+ }
+ pr_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));
+ pr_notice(" physical IVG%i asserted : %s\n", i, buf);
+ } else
+ pr_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)
+ raw_spin_lock_irqsave(&irq_desc[i].lock, flags);
+
+ action = irq_desc[i].action;
+ if (!action)
+ goto unlock;
+
+ decode_address(buf, (unsigned int)action->handler);
+ pr_notice(" logical irq %3d mapped : %s", i, buf);
+ for (action = action->next; action; action = action->next) {
+ decode_address(buf, (unsigned int)action->handler);
+ pr_cont(", %s", buf);
+ }
+ pr_cont("\n");
+unlock:
+ if (!in_atomic)
+ raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags);
+ }
+ }
+
+ decode_address(buf, fp->rete);
+ pr_notice(" RETE: %s\n", buf);
+ decode_address(buf, fp->retn);
+ pr_notice(" RETN: %s\n", buf);
+ decode_address(buf, fp->retx);
+ pr_notice(" RETX: %s\n", buf);
+ decode_address(buf, fp->rets);
+ pr_notice(" RETS: %s\n", buf);
+ decode_address(buf, fp->pc);
+ pr_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);
+ pr_notice("DCPLB_FAULT_ADDR: %s\n", buf);
+ decode_address(buf, cpu_pda[cpu].icplb_fault_addr);
+ pr_notice("ICPLB_FAULT_ADDR: %s\n", buf);
+ }
+
+ pr_notice("PROCESSOR STATE:\n");
+ pr_notice(" R0 : %08lx R1 : %08lx R2 : %08lx R3 : %08lx\n",
+ fp->r0, fp->r1, fp->r2, fp->r3);
+ pr_notice(" R4 : %08lx R5 : %08lx R6 : %08lx R7 : %08lx\n",
+ fp->r4, fp->r5, fp->r6, fp->r7);
+ pr_notice(" P0 : %08lx P1 : %08lx P2 : %08lx P3 : %08lx\n",
+ fp->p0, fp->p1, fp->p2, fp->p3);
+ pr_notice(" P4 : %08lx P5 : %08lx FP : %08lx SP : %08lx\n",
+ fp->p4, fp->p5, fp->fp, (long)fp);
+ pr_notice(" LB0: %08lx LT0: %08lx LC0: %08lx\n",
+ fp->lb0, fp->lt0, fp->lc0);
+ pr_notice(" LB1: %08lx LT1: %08lx LC1: %08lx\n",
+ fp->lb1, fp->lt1, fp->lc1);
+ pr_notice(" B0 : %08lx L0 : %08lx M0 : %08lx I0 : %08lx\n",
+ fp->b0, fp->l0, fp->m0, fp->i0);
+ pr_notice(" B1 : %08lx L1 : %08lx M1 : %08lx I1 : %08lx\n",
+ fp->b1, fp->l1, fp->m1, fp->i1);
+ pr_notice(" B2 : %08lx L2 : %08lx M2 : %08lx I2 : %08lx\n",
+ fp->b2, fp->l2, fp->m2, fp->i2);
+ pr_notice(" B3 : %08lx L3 : %08lx M3 : %08lx I3 : %08lx\n",
+ fp->b3, fp->l3, fp->m3, fp->i3);
+ pr_notice("A0.w: %08lx A0.x: %08lx A1.w: %08lx A1.x: %08lx\n",
+ fp->a0w, fp->a0x, fp->a1w, fp->a1x);
+
+ pr_notice("USP : %08lx ASTAT: %08lx\n",
+ rdusp(), fp->astat);
+
+ pr_notice("\n");
+}
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index ba70c4bc269..59c1df75e4d 100644
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -1,25 +1,22 @@
/*
- * Copyright 2004-2009 Analog Devices Inc.
+ * Main exception handling logic.
+ *
+ * Copyright 2004-2010 Analog Devices Inc.
*
* 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>
+#include <asm/pseudo_instructions.h>
#ifdef CONFIG_KGDB
# include <linux/kgdb.h>
@@ -62,194 +59,6 @@ void __init trap_init(void)
CSYNC();
}
-static void decode_address(char *buf, unsigned long address)
-{
-#ifdef CONFIG_DEBUG_VERBOSE
- 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
- /* 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, "{ %s%s%s%s + 0x%lx }",
- delim, modname, delim, symname,
- (unsigned long)offset);
- return;
- }
-#endif
-
- if (address >= FIXED_CODE_START && address < FIXED_CODE_END) {
- /* Problem in fixed code section? */
- strcat(buf, "/* Maybe fixed code section */");
- return;
-
- } else if (address < CONFIG_BOOT_LOAD) {
- /* Problem somewhere before the kernel start address */
- strcat(buf, "/* Maybe null pointer? */");
- return;
-
- } else if (address >= COREMMR_BASE) {
- strcat(buf, "/* core mmrs */");
- return;
-
- } else if (address >= SYSMMR_BASE) {
- strcat(buf, "/* system mmrs */");
- return;
-
- } else if (address >= L1_ROM_START && address < L1_ROM_START + L1_ROM_LENGTH) {
- strcat(buf, "/* on-chip L1 ROM */");
- return;
- }
-
- /*
- * Don't walk any of the vmas if we are oopsing, it has been known
- * to cause problems - corrupt vmas (kernel crashes) cause double faults
- */
- if (oops_in_progress) {
- strcat(buf, "/* kernel dynamic memory (maybe user-space) */");
- 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;
-
- 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;
- }
-
- /* 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, "[ %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);
- }
-
- /*
- * we were unable to find this address anywhere,
- * or some MMs were skipped because they were in use.
- */
- 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;
-#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;
@@ -260,6 +69,9 @@ asmlinkage notrace void trap_c(struct pt_regs *fp)
#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
int j;
#endif
+#ifdef CONFIG_BFIN_PSEUDODBG_INSNS
+ int opcode;
+#endif
unsigned int cpu = raw_smp_processor_id();
const char *strerror = NULL;
int sig = 0;
@@ -392,6 +204,19 @@ asmlinkage notrace void trap_c(struct pt_regs *fp)
}
}
#endif
+#ifdef CONFIG_BFIN_PSEUDODBG_INSNS
+ /*
+ * Support for the fake instructions, if the instruction fails,
+ * then just execute a illegal opcode failure (like normal).
+ * Don't support these instructions inside the kernel
+ */
+ if (!kernel_mode_regs(fp) && get_instruction(&opcode, (unsigned short *)fp->pc)) {
+ if (execute_pseudodbg_assert(fp, opcode))
+ goto traps_done;
+ if (execute_pseudodbg(fp, opcode))
+ goto traps_done;
+ }
+#endif
info.si_code = ILL_ILLOPC;
sig = SIGILL;
strerror = KERN_NOTICE EXC_0x21(KERN_NOTICE);
@@ -672,659 +497,44 @@ asmlinkage notrace void trap_c(struct pt_regs *fp)
trace_buffer_restore(j);
}
-/* 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
-
- trace_buffer_save(tflags);
-
- printk(KERN_NOTICE "Hardware Trace:\n");
-
-#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
- printk(KERN_NOTICE "WARNING: Expanded trace turned on - can not trace exceptions\n");
-#endif
-
- if (likely(bfin_read_TBUFSTAT() & TBUFCNT)) {
- for (; bfin_read_TBUFSTAT() & TBUFCNT; i++) {
- decode_address(buf, (unsigned long)bfin_read_TBUF());
- printk(KERN_NOTICE "%4i Target : %s\n", i, buf);
- addr = (unsigned short *)bfin_read_TBUF();
- decode_address(buf, (unsigned long)addr);
- printk(KERN_NOTICE " Source : %s ", buf);
- decode_instruction(addr);
- printk("\n");
- }
- }
-
-#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
- if (trace_buff_offset)
- index = trace_buff_offset / 4;
- else
- index = EXPAND_LEN;
-
- j = (1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN) * 128;
- while (j) {
- decode_address(buf, software_trace_buff[index]);
- printk(KERN_NOTICE "%4i Target : %s\n", i, buf);
- index -= 1;
- if (index < 0 )
- index = EXPAND_LEN;
- decode_address(buf, software_trace_buff[index]);
- printk(KERN_NOTICE " Source : %s ", buf);
- decode_instruction((unsigned short *)software_trace_buff[index]);
- printk("\n");
- index -= 1;
- if (index < 0)
- index = EXPAND_LEN;
- j--;
- i++;
- }
-#endif
-
- trace_buffer_restore(tflags);
-#endif
-#endif
-}
-EXPORT_SYMBOL(dump_bfin_trace_buffer);
-
-#ifdef CONFIG_BUG
-int is_valid_bugaddr(unsigned long 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;
-
-}
-
-void show_stack(struct task_struct *task, unsigned long *stack)
-{
-#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;
-
- /*
- * 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 == NULL) {
- if (task) {
- /* We know this is a kernel stack, so this is the start/end */
- stack = (unsigned long *)task->thread.ksp;
- endstack = (unsigned int *)(((unsigned int)(stack) & ~(THREAD_SIZE - 1)) + THREAD_SIZE);
- } else {
- /* print out the existing stack info */
- stack = (unsigned long *)&stack;
- endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack);
- }
- } else
- endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack);
-
- printk(KERN_NOTICE "Stack info:\n");
- decode_address(buf, (unsigned int)stack);
- printk(KERN_NOTICE " SP: [0x%p] %s\n", stack, buf);
-
- if (!access_ok(VERIFY_READ, stack, (unsigned int)endstack - (unsigned int)stack)) {
- printk(KERN_NOTICE "Invalid stack pointer\n");
- return;
- }
-
- /* 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;
- }
- }
- if (fp) {
- frame = fp;
- printk(KERN_NOTICE " FP: (0x%p)\n", fp);
- } else
- frame = 0;
-
- /*
- * Now that we think we know where things are, we
- * walk the stack again, this time printing things out
- * incase there is no frame pointer, we still look for
- * valid return addresses
- */
-
- /* First time print out data, next time, print out symbols */
- for (j = 0; j <= 1; j++) {
- if (j)
- printk(KERN_NOTICE "Return addresses in stack:\n");
- else
- printk(KERN_NOTICE " Memory from 0x%08lx to %p", ((long unsigned int)stack & ~0xF), endstack);
-
- fp = frame;
- frame_no = 0;
-
- for (addr = (unsigned int *)((unsigned int)stack & ~0xF), i = 0;
- addr < endstack; addr++, i++) {
-
- ret_addr = 0;
- if (!j && i % 8 == 0)
- printk(KERN_NOTICE "%p:",addr);
-
- /* if it is an odd address, or zero, just skip it */
- if (*addr & 0x1 || !*addr)
- goto print;
-
- ins_addr = (unsigned short *)*addr;
-
- /* Go back one instruction, and see if it is a CALL */
- ins_addr--;
- ret_addr = is_bfin_call(ins_addr);
- print:
- if (!j && stack == (unsigned long *)addr)
- printk("[%08x]", *addr);
- else if (ret_addr)
- if (j) {
- decode_address(buf, (unsigned int)*addr);
- if (frame == addr) {
- printk(KERN_NOTICE " frame %2i : %s\n", frame_no, buf);
- continue;
- }
- printk(KERN_NOTICE " address : %s\n", buf);
- } else
- printk("<%08x>", *addr);
- else if (fp == addr) {
- if (j)
- frame = addr+1;
- else
- printk("(%08x)", *addr);
-
- fp = (unsigned int *)*addr;
- frame_no++;
-
- } else if (!j)
- printk(" %08x ", *addr);
- }
- if (!j)
- printk("\n");
- }
-#endif
-}
-EXPORT_SYMBOL(show_stack);
-
-void dump_stack(void)
+asmlinkage void double_fault_c(struct pt_regs *fp)
{
- unsigned long stack;
#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
- int tflags;
+ int j;
+ trace_buffer_save(j);
#endif
- trace_buffer_save(tflags);
- dump_bfin_trace_buffer();
- show_stack(current, &stack);
- trace_buffer_restore(tflags);
-}
-EXPORT_SYMBOL(dump_stack);
-void dump_bfin_process(struct pt_regs *fp)
-{
+ console_verbose();
+ oops_in_progress = 1;
#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",
- current->comm, current->pid);
- else
- verbose_printk(KERN_NOTICE "COMM= invalid");
+ 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);
- printk(KERN_CONT " CPU=%d\n", current_thread_info()->cpu);
- if (!((unsigned long)current->mm & 0x3) && (unsigned long)current->mm >= FIXED_CODE_START)
- verbose_printk(KERN_NOTICE
- "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n"
- " BSS = 0x%p-0x%p USER-STACK = 0x%p\n\n",
- (void *)current->mm->start_code,
- (void *)current->mm->end_code,
- (void *)current->mm->start_data,
- (void *)current->mm->end_data,
- (void *)current->mm->end_data,
- (void *)current->mm->brk,
- (void *)current->mm->start_stack);
- else
- verbose_printk(KERN_NOTICE "invalid mm\n");
+ decode_address(buf, fp->retx);
+ printk(KERN_NOTICE "The instruction at %s caused a double exception\n", buf);
} 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;
- }
-
- 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
- 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");
- }
- }
-#endif
- }
-#endif
-}
-
-void show_regs(struct pt_regs *fp)
-{
-#ifdef CONFIG_DEBUG_VERBOSE
- char buf [150];
- struct irqaction *action;
- unsigned int i;
- unsigned long flags = 0;
- unsigned int cpu = 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
+ {
+ dump_bfin_process(fp);
+ dump_bfin_mem(fp);
+ show_regs(fp);
+ dump_bfin_trace_buffer();
}
- 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)
- raw_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)
- raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags);
- }
- }
-
- decode_address(buf, fp->rete);
- verbose_printk(KERN_NOTICE " RETE: %s\n", buf);
- decode_address(buf, fp->retn);
- verbose_printk(KERN_NOTICE " RETN: %s\n", buf);
- decode_address(buf, fp->retx);
- verbose_printk(KERN_NOTICE " RETX: %s\n", buf);
- decode_address(buf, fp->rets);
- verbose_printk(KERN_NOTICE " RETS: %s\n", buf);
- decode_address(buf, fp->pc);
- verbose_printk(KERN_NOTICE " PC : %s\n", buf);
-
- if (((long)fp->seqstat & SEQSTAT_EXCAUSE) &&
- (((long)fp->seqstat & SEQSTAT_EXCAUSE) != VEC_HWERR)) {
- decode_address(buf, cpu_pda[cpu].dcplb_fault_addr);
- verbose_printk(KERN_NOTICE "DCPLB_FAULT_ADDR: %s\n", buf);
- decode_address(buf, cpu_pda[cpu].icplb_fault_addr);
- verbose_printk(KERN_NOTICE "ICPLB_FAULT_ADDR: %s\n", buf);
- }
-
- verbose_printk(KERN_NOTICE "PROCESSOR STATE:\n");
- verbose_printk(KERN_NOTICE " R0 : %08lx R1 : %08lx R2 : %08lx R3 : %08lx\n",
- fp->r0, fp->r1, fp->r2, fp->r3);
- verbose_printk(KERN_NOTICE " R4 : %08lx R5 : %08lx R6 : %08lx R7 : %08lx\n",
- fp->r4, fp->r5, fp->r6, fp->r7);
- verbose_printk(KERN_NOTICE " P0 : %08lx P1 : %08lx P2 : %08lx P3 : %08lx\n",
- fp->p0, fp->p1, fp->p2, fp->p3);
- verbose_printk(KERN_NOTICE " P4 : %08lx P5 : %08lx FP : %08lx SP : %08lx\n",
- fp->p4, fp->p5, fp->fp, (long)fp);
- verbose_printk(KERN_NOTICE " LB0: %08lx LT0: %08lx LC0: %08lx\n",
- fp->lb0, fp->lt0, fp->lc0);
- verbose_printk(KERN_NOTICE " LB1: %08lx LT1: %08lx LC1: %08lx\n",
- fp->lb1, fp->lt1, fp->lc1);
- verbose_printk(KERN_NOTICE " B0 : %08lx L0 : %08lx M0 : %08lx I0 : %08lx\n",
- fp->b0, fp->l0, fp->m0, fp->i0);
- verbose_printk(KERN_NOTICE " B1 : %08lx L1 : %08lx M1 : %08lx I1 : %08lx\n",
- fp->b1, fp->l1, fp->m1, fp->i1);
- verbose_printk(KERN_NOTICE " B2 : %08lx L2 : %08lx M2 : %08lx I2 : %08lx\n",
- fp->b2, fp->l2, fp->m2, fp->i2);
- verbose_printk(KERN_NOTICE " B3 : %08lx L3 : %08lx M3 : %08lx I3 : %08lx\n",
- fp->b3, fp->l3, fp->m3, fp->i3);
- verbose_printk(KERN_NOTICE "A0.w: %08lx A0.x: %08lx A1.w: %08lx A1.x: %08lx\n",
- fp->a0w, fp->a0x, fp->a1w, fp->a1x);
-
- verbose_printk(KERN_NOTICE "USP : %08lx ASTAT: %08lx\n",
- rdusp(), fp->astat);
-
- verbose_printk(KERN_NOTICE "\n");
#endif
-}
-
-#ifdef CONFIG_SYS_BFIN_SPINLOCK_L1
-asmlinkage int sys_bfin_spinlock(int *spinlock)__attribute__((l1_text));
-#endif
-
-static DEFINE_SPINLOCK(bfin_spinlock_lock);
-
-asmlinkage int sys_bfin_spinlock(int *p)
-{
- int ret, tmp = 0;
-
- 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;
- else
- put_user(1, p);
- }
- spin_unlock(&bfin_spinlock_lock);
- return ret;
-}
-
-int bfin_request_exception(unsigned int exception, void (*handler)(void))
-{
- void (*curr_handler)(void);
-
- if (exception > 0x3F)
- return -EINVAL;
-
- curr_handler = ex_table[exception];
-
- if (curr_handler != ex_replaceable)
- return -EBUSY;
-
- ex_table[exception] = handler;
+ panic("Double Fault - unrecoverable event");
- return 0;
}
-EXPORT_SYMBOL(bfin_request_exception);
-
-int bfin_free_exception(unsigned int exception, void (*handler)(void))
-{
- void (*curr_handler)(void);
-
- if (exception > 0x3F)
- return -EINVAL;
-
- curr_handler = ex_table[exception];
- if (curr_handler != handler)
- return -EBUSY;
-
- ex_table[exception] = ex_replaceable;
-
- return 0;
-}
-EXPORT_SYMBOL(bfin_free_exception);
void panic_cplb_error(int cplb_panic, struct pt_regs *fp)
{
@@ -1349,3 +559,23 @@ void panic_cplb_error(int cplb_panic, struct pt_regs *fp)
dump_stack();
panic("Unrecoverable event");
}
+
+#ifdef CONFIG_BUG
+int is_valid_bugaddr(unsigned long addr)
+{
+ unsigned int opcode;
+
+ if (!get_instruction(&opcode, (unsigned short *)addr))
+ return 0;
+
+ return opcode == BFIN_BUG_OPCODE;
+}
+#endif
+
+/* stub this out */
+#ifndef CONFIG_DEBUG_VERBOSE
+void show_regs(struct pt_regs *fp)
+{
+
+}
+#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-01 16:36:28 +0000