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authorLinus Torvalds <torvalds@linux-foundation.org>2010-05-24 11:02:58 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-24 11:02:58 -0400
commit064e297c324fff9b62226aae5dc468ebb272433c (patch)
tree49d031d180a30d6e94e4cfdcc46ec966399d8856 /arch/blackfin/kernel
parentf13771187b9423b824f32518319f6da85d819003 (diff)
parentdb52ecc2953d932b2fc1c62e585231659edd1d98 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin: (30 commits) Blackfin: SMP: fix continuation lines Blackfin: acvilon: fix timeout usage for I2C Blackfin: fix typo in BF537 IRQ comment Blackfin: unify duplicate MEM_MT48LC32M8A2_75 kconfig options Blackfin: set ARCH_KMALLOC_MINALIGN Blackfin: use atomic kmalloc in L1 alloc so it too can be atomic Blackfin: another year of changes (update copyright in boot log) Blackfin: optimize strncpy a bit Blackfin: isram: clean up ITEST_COMMAND macro and improve the selftests Blackfin: move string functions to normal lib/ assembly Blackfin: SIC: cut down on IAR MMR reads a bit Blackfin: bf537-minotaur: fix build errors due to header changes Blackfin: kgdb: pass up the CC register instead of a 0 stub Blackfin: handle HW errors in the new "FAULT" printing code Blackfin: show the whole accumulator in the pseudo DBG insn Blackfin: support all possible registers in the pseudo instructions Blackfin: add support for the DBG (debug output) pseudo insn Blackfin: change the BUG opcode to an unused 16-bit opcode Blackfin: allow NMI watchdog to be used w/RETN as a scratch reg Blackfin: add support for the DBGA (debug assert) pseudo insn ...
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/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
11 files changed, 1510 insertions, 958 deletions
diff --git a/arch/blackfin/kernel/Makefile b/arch/blackfin/kernel/Makefile
index 346a421f1562..30d0d1f01dc7 100644
--- a/arch/blackfin/kernel/Makefile
+++ b/arch/blackfin/kernel/Makefile
@@ -7,7 +7,8 @@ extra-y := init_task.o vmlinux.lds
7obj-y := \ 7obj-y := \
8 entry.o process.o bfin_ksyms.o ptrace.o setup.o signal.o \ 8 entry.o process.o bfin_ksyms.o ptrace.o setup.o signal.o \
9 sys_bfin.o traps.o irqchip.o dma-mapping.o flat.o \ 9 sys_bfin.o traps.o irqchip.o dma-mapping.o flat.o \
10 fixed_code.o reboot.o bfin_gpio.o bfin_dma_5xx.o 10 fixed_code.o reboot.o bfin_gpio.o bfin_dma_5xx.o \
11 exception.o dumpstack.o
11 12
12ifeq ($(CONFIG_GENERIC_CLOCKEVENTS),y) 13ifeq ($(CONFIG_GENERIC_CLOCKEVENTS),y)
13 obj-y += time-ts.o 14 obj-y += time-ts.o
@@ -29,6 +30,8 @@ obj-$(CONFIG_NMI_WATCHDOG) += nmi.o
29obj-$(CONFIG_EARLY_PRINTK) += early_printk.o 30obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
30obj-$(CONFIG_EARLY_PRINTK) += shadow_console.o 31obj-$(CONFIG_EARLY_PRINTK) += shadow_console.o
31obj-$(CONFIG_STACKTRACE) += stacktrace.o 32obj-$(CONFIG_STACKTRACE) += stacktrace.o
33obj-$(CONFIG_DEBUG_VERBOSE) += trace.o
34obj-$(CONFIG_BFIN_PSEUDODBG_INSNS) += pseudodbg.o
32 35
33# the kgdb test puts code into L2 and without linker 36# the kgdb test puts code into L2 and without linker
34# relaxation, we need to force long calls to/from it 37# 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 e35e20f00d9b..42833ee2b308 100644
--- a/arch/blackfin/kernel/bfin_gpio.c
+++ b/arch/blackfin/kernel/bfin_gpio.c
@@ -475,9 +475,7 @@ GET_GPIO_P(maskb)
475 475
476 476
477#ifdef CONFIG_PM 477#ifdef CONFIG_PM
478
479static unsigned short wakeup_map[GPIO_BANK_NUM]; 478static unsigned short wakeup_map[GPIO_BANK_NUM];
480static unsigned char wakeup_flags_map[MAX_BLACKFIN_GPIOS];
481 479
482static const unsigned int sic_iwr_irqs[] = { 480static const unsigned int sic_iwr_irqs[] = {
483#if defined(BF533_FAMILY) 481#if defined(BF533_FAMILY)
@@ -514,112 +512,26 @@ static const unsigned int sic_iwr_irqs[] = {
514************************************************************* 512*************************************************************
515* MODIFICATION HISTORY : 513* MODIFICATION HISTORY :
516**************************************************************/ 514**************************************************************/
517int gpio_pm_wakeup_request(unsigned gpio, unsigned char type) 515int gpio_pm_wakeup_ctrl(unsigned gpio, unsigned ctrl)
518{
519 unsigned long flags;
520
521 if ((check_gpio(gpio) < 0) || !type)
522 return -EINVAL;
523
524 local_irq_save_hw(flags);
525 wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio);
526 wakeup_flags_map[gpio] = type;
527 local_irq_restore_hw(flags);
528
529 return 0;
530}
531EXPORT_SYMBOL(gpio_pm_wakeup_request);
532
533void gpio_pm_wakeup_free(unsigned gpio)
534{ 516{
535 unsigned long flags; 517 unsigned long flags;
536 518
537 if (check_gpio(gpio) < 0) 519 if (check_gpio(gpio) < 0)
538 return; 520 return -EINVAL;
539 521
540 local_irq_save_hw(flags); 522 local_irq_save_hw(flags);
541 523 if (ctrl)
542 wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio); 524 wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio);
543
544 local_irq_restore_hw(flags);
545}
546EXPORT_SYMBOL(gpio_pm_wakeup_free);
547
548static int bfin_gpio_wakeup_type(unsigned gpio, unsigned char type)
549{
550 port_setup(gpio, GPIO_USAGE);
551 set_gpio_dir(gpio, 0);
552 set_gpio_inen(gpio, 1);
553
554 if (type & (PM_WAKE_RISING | PM_WAKE_FALLING))
555 set_gpio_edge(gpio, 1);
556 else
557 set_gpio_edge(gpio, 0);
558
559 if ((type & (PM_WAKE_BOTH_EDGES)) == (PM_WAKE_BOTH_EDGES))
560 set_gpio_both(gpio, 1);
561 else 525 else
562 set_gpio_both(gpio, 0); 526 wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
563
564 if ((type & (PM_WAKE_FALLING | PM_WAKE_LOW)))
565 set_gpio_polar(gpio, 1);
566 else
567 set_gpio_polar(gpio, 0);
568 527
569 SSYNC(); 528 set_gpio_maskb(gpio, ctrl);
570 529 local_irq_restore_hw(flags);
571 return 0;
572}
573
574u32 bfin_pm_standby_setup(void)
575{
576 u16 bank, mask, i, gpio;
577
578 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
579 mask = wakeup_map[gpio_bank(i)];
580 bank = gpio_bank(i);
581
582 gpio_bank_saved[bank].maskb = gpio_array[bank]->maskb;
583 gpio_array[bank]->maskb = 0;
584
585 if (mask) {
586#if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
587 gpio_bank_saved[bank].fer = *port_fer[bank];
588#endif
589 gpio_bank_saved[bank].inen = gpio_array[bank]->inen;
590 gpio_bank_saved[bank].polar = gpio_array[bank]->polar;
591 gpio_bank_saved[bank].dir = gpio_array[bank]->dir;
592 gpio_bank_saved[bank].edge = gpio_array[bank]->edge;
593 gpio_bank_saved[bank].both = gpio_array[bank]->both;
594 gpio_bank_saved[bank].reserved =
595 reserved_gpio_map[bank];
596
597 gpio = i;
598
599 while (mask) {
600 if ((mask & 1) && (wakeup_flags_map[gpio] !=
601 PM_WAKE_IGNORE)) {
602 reserved_gpio_map[gpio_bank(gpio)] |=
603 gpio_bit(gpio);
604 bfin_gpio_wakeup_type(gpio,
605 wakeup_flags_map[gpio]);
606 set_gpio_data(gpio, 0); /*Clear*/
607 }
608 gpio++;
609 mask >>= 1;
610 }
611
612 bfin_internal_set_wake(sic_iwr_irqs[bank], 1);
613 gpio_array[bank]->maskb_set = wakeup_map[gpio_bank(i)];
614 }
615 }
616
617 AWA_DUMMY_READ(maskb_set);
618 530
619 return 0; 531 return 0;
620} 532}
621 533
622void bfin_pm_standby_restore(void) 534int bfin_pm_standby_ctrl(unsigned ctrl)
623{ 535{
624 u16 bank, mask, i; 536 u16 bank, mask, i;
625 537
@@ -627,24 +539,10 @@ void bfin_pm_standby_restore(void)
627 mask = wakeup_map[gpio_bank(i)]; 539 mask = wakeup_map[gpio_bank(i)];
628 bank = gpio_bank(i); 540 bank = gpio_bank(i);
629 541
630 if (mask) { 542 if (mask)
631#if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x) 543 bfin_internal_set_wake(sic_iwr_irqs[bank], ctrl);
632 *port_fer[bank] = gpio_bank_saved[bank].fer;
633#endif
634 gpio_array[bank]->inen = gpio_bank_saved[bank].inen;
635 gpio_array[bank]->dir = gpio_bank_saved[bank].dir;
636 gpio_array[bank]->polar = gpio_bank_saved[bank].polar;
637 gpio_array[bank]->edge = gpio_bank_saved[bank].edge;
638 gpio_array[bank]->both = gpio_bank_saved[bank].both;
639
640 reserved_gpio_map[bank] =
641 gpio_bank_saved[bank].reserved;
642 bfin_internal_set_wake(sic_iwr_irqs[bank], 0);
643 }
644
645 gpio_array[bank]->maskb = gpio_bank_saved[bank].maskb;
646 } 544 }
647 AWA_DUMMY_READ(maskb); 545 return 0;
648} 546}
649 547
650void bfin_gpio_pm_hibernate_suspend(void) 548void bfin_gpio_pm_hibernate_suspend(void)
@@ -708,16 +606,11 @@ void bfin_gpio_pm_hibernate_restore(void)
708#else /* CONFIG_BF54x */ 606#else /* CONFIG_BF54x */
709#ifdef CONFIG_PM 607#ifdef CONFIG_PM
710 608
711u32 bfin_pm_standby_setup(void) 609int bfin_pm_standby_ctrl(unsigned ctrl)
712{ 610{
713 return 0; 611 return 0;
714} 612}
715 613
716void bfin_pm_standby_restore(void)
717{
718
719}
720
721void bfin_gpio_pm_hibernate_suspend(void) 614void bfin_gpio_pm_hibernate_suspend(void)
722{ 615{
723 int i, bank; 616 int i, bank;
diff --git a/arch/blackfin/kernel/bfin_ksyms.c b/arch/blackfin/kernel/bfin_ksyms.c
index ed8392c117ea..2c264b51566a 100644
--- a/arch/blackfin/kernel/bfin_ksyms.c
+++ b/arch/blackfin/kernel/bfin_ksyms.c
@@ -33,6 +33,18 @@ EXPORT_SYMBOL(memmove);
33EXPORT_SYMBOL(memchr); 33EXPORT_SYMBOL(memchr);
34 34
35/* 35/*
36 * Because string functions are both inline and exported functions and
37 * folder arch/blackfin/lib is configured as a library path in Makefile,
38 * symbols exported in folder lib is not linked into built-in.o but
39 * inlined only. In order to export string symbols to kernel module
40 * properly, they should be exported here.
41 */
42EXPORT_SYMBOL(strcpy);
43EXPORT_SYMBOL(strncpy);
44EXPORT_SYMBOL(strcmp);
45EXPORT_SYMBOL(strncmp);
46
47/*
36 * libgcc functions - functions that are used internally by the 48 * libgcc functions - functions that are used internally by the
37 * compiler... (prototypes are not correct though, but that 49 * compiler... (prototypes are not correct though, but that
38 * doesn't really matter since they're not versioned). 50 * 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 000000000000..5cfbaa298211
--- /dev/null
+++ b/arch/blackfin/kernel/dumpstack.c
@@ -0,0 +1,174 @@
1/* Provide basic stack dumping functions
2 *
3 * Copyright 2004-2009 Analog Devices Inc.
4 *
5 * Licensed under the GPL-2 or later
6 */
7
8#include <linux/kernel.h>
9#include <linux/thread_info.h>
10#include <linux/mm.h>
11#include <linux/uaccess.h>
12#include <linux/module.h>
13#include <asm/trace.h>
14
15/*
16 * Checks to see if the address pointed to is either a
17 * 16-bit CALL instruction, or a 32-bit CALL instruction
18 */
19static bool is_bfin_call(unsigned short *addr)
20{
21 unsigned int opcode;
22
23 if (!get_instruction(&opcode, addr))
24 return false;
25
26 if ((opcode >= 0x0060 && opcode <= 0x0067) ||
27 (opcode >= 0x0070 && opcode <= 0x0077) ||
28 (opcode >= 0xE3000000 && opcode <= 0xE3FFFFFF))
29 return true;
30
31 return false;
32
33}
34
35void show_stack(struct task_struct *task, unsigned long *stack)
36{
37#ifdef CONFIG_PRINTK
38 unsigned int *addr, *endstack, *fp = 0, *frame;
39 unsigned short *ins_addr;
40 char buf[150];
41 unsigned int i, j, ret_addr, frame_no = 0;
42
43 /*
44 * If we have been passed a specific stack, use that one otherwise
45 * if we have been passed a task structure, use that, otherwise
46 * use the stack of where the variable "stack" exists
47 */
48
49 if (stack == NULL) {
50 if (task) {
51 /* We know this is a kernel stack, so this is the start/end */
52 stack = (unsigned long *)task->thread.ksp;
53 endstack = (unsigned int *)(((unsigned int)(stack) & ~(THREAD_SIZE - 1)) + THREAD_SIZE);
54 } else {
55 /* print out the existing stack info */
56 stack = (unsigned long *)&stack;
57 endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack);
58 }
59 } else
60 endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack);
61
62 printk(KERN_NOTICE "Stack info:\n");
63 decode_address(buf, (unsigned int)stack);
64 printk(KERN_NOTICE " SP: [0x%p] %s\n", stack, buf);
65
66 if (!access_ok(VERIFY_READ, stack, (unsigned int)endstack - (unsigned int)stack)) {
67 printk(KERN_NOTICE "Invalid stack pointer\n");
68 return;
69 }
70
71 /* First thing is to look for a frame pointer */
72 for (addr = (unsigned int *)((unsigned int)stack & ~0xF); addr < endstack; addr++) {
73 if (*addr & 0x1)
74 continue;
75 ins_addr = (unsigned short *)*addr;
76 ins_addr--;
77 if (is_bfin_call(ins_addr))
78 fp = addr - 1;
79
80 if (fp) {
81 /* Let's check to see if it is a frame pointer */
82 while (fp >= (addr - 1) && fp < endstack
83 && fp && ((unsigned int) fp & 0x3) == 0)
84 fp = (unsigned int *)*fp;
85 if (fp == 0 || fp == endstack) {
86 fp = addr - 1;
87 break;
88 }
89 fp = 0;
90 }
91 }
92 if (fp) {
93 frame = fp;
94 printk(KERN_NOTICE " FP: (0x%p)\n", fp);
95 } else
96 frame = 0;
97
98 /*
99 * Now that we think we know where things are, we
100 * walk the stack again, this time printing things out
101 * incase there is no frame pointer, we still look for
102 * valid return addresses
103 */
104
105 /* First time print out data, next time, print out symbols */
106 for (j = 0; j <= 1; j++) {
107 if (j)
108 printk(KERN_NOTICE "Return addresses in stack:\n");
109 else
110 printk(KERN_NOTICE " Memory from 0x%08lx to %p", ((long unsigned int)stack & ~0xF), endstack);
111
112 fp = frame;
113 frame_no = 0;
114
115 for (addr = (unsigned int *)((unsigned int)stack & ~0xF), i = 0;
116 addr < endstack; addr++, i++) {
117
118 ret_addr = 0;
119 if (!j && i % 8 == 0)
120 printk(KERN_NOTICE "%p:", addr);
121
122 /* if it is an odd address, or zero, just skip it */
123 if (*addr & 0x1 || !*addr)
124 goto print;
125
126 ins_addr = (unsigned short *)*addr;
127
128 /* Go back one instruction, and see if it is a CALL */
129 ins_addr--;
130 ret_addr = is_bfin_call(ins_addr);
131 print:
132 if (!j && stack == (unsigned long *)addr)
133 printk("[%08x]", *addr);
134 else if (ret_addr)
135 if (j) {
136 decode_address(buf, (unsigned int)*addr);
137 if (frame == addr) {
138 printk(KERN_NOTICE " frame %2i : %s\n", frame_no, buf);
139 continue;
140 }
141 printk(KERN_NOTICE " address : %s\n", buf);
142 } else
143 printk("<%08x>", *addr);
144 else if (fp == addr) {
145 if (j)
146 frame = addr+1;
147 else
148 printk("(%08x)", *addr);
149
150 fp = (unsigned int *)*addr;
151 frame_no++;
152
153 } else if (!j)
154 printk(" %08x ", *addr);
155 }
156 if (!j)
157 printk("\n");
158 }
159#endif
160}
161EXPORT_SYMBOL(show_stack);
162
163void dump_stack(void)
164{
165 unsigned long stack;
166#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
167 int tflags;
168#endif
169 trace_buffer_save(tflags);
170 dump_bfin_trace_buffer();
171 show_stack(current, &stack);
172 trace_buffer_restore(tflags);
173}
174EXPORT_SYMBOL(dump_stack);
diff --git a/arch/blackfin/kernel/exception.c b/arch/blackfin/kernel/exception.c
new file mode 100644
index 000000000000..9208b5fd5186
--- /dev/null
+++ b/arch/blackfin/kernel/exception.c
@@ -0,0 +1,45 @@
1/* Basic functions for adding/removing custom exception handlers
2 *
3 * Copyright 2004-2009 Analog Devices Inc.
4 *
5 * Licensed under the GPL-2 or later
6 */
7
8#include <linux/module.h>
9#include <asm/irq_handler.h>
10
11int bfin_request_exception(unsigned int exception, void (*handler)(void))
12{
13 void (*curr_handler)(void);
14
15 if (exception > 0x3F)
16 return -EINVAL;
17
18 curr_handler = ex_table[exception];
19
20 if (curr_handler != ex_replaceable)
21 return -EBUSY;
22
23 ex_table[exception] = handler;
24
25 return 0;
26}
27EXPORT_SYMBOL(bfin_request_exception);
28
29int bfin_free_exception(unsigned int exception, void (*handler)(void))
30{
31 void (*curr_handler)(void);
32
33 if (exception > 0x3F)
34 return -EINVAL;
35
36 curr_handler = ex_table[exception];
37
38 if (curr_handler != handler)
39 return -EBUSY;
40
41 ex_table[exception] = ex_replaceable;
42
43 return 0;
44}
45EXPORT_SYMBOL(bfin_free_exception);
diff --git a/arch/blackfin/kernel/kgdb.c b/arch/blackfin/kernel/kgdb.c
index 7367aea4ae59..08bc44ea6883 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)
66 gdb_regs[BFIN_RETN] = regs->retn; 66 gdb_regs[BFIN_RETN] = regs->retn;
67 gdb_regs[BFIN_RETE] = regs->rete; 67 gdb_regs[BFIN_RETE] = regs->rete;
68 gdb_regs[BFIN_PC] = regs->pc; 68 gdb_regs[BFIN_PC] = regs->pc;
69 gdb_regs[BFIN_CC] = 0; 69 gdb_regs[BFIN_CC] = (regs->astat >> 5) & 1;
70 gdb_regs[BFIN_EXTRA1] = 0; 70 gdb_regs[BFIN_EXTRA1] = 0;
71 gdb_regs[BFIN_EXTRA2] = 0; 71 gdb_regs[BFIN_EXTRA2] = 0;
72 gdb_regs[BFIN_EXTRA3] = 0; 72 gdb_regs[BFIN_EXTRA3] = 0;
diff --git a/arch/blackfin/kernel/pseudodbg.c b/arch/blackfin/kernel/pseudodbg.c
new file mode 100644
index 000000000000..db85bc94334e
--- /dev/null
+++ b/arch/blackfin/kernel/pseudodbg.c
@@ -0,0 +1,191 @@
1/* The fake debug assert instructions
2 *
3 * Copyright 2010 Analog Devices Inc.
4 *
5 * Licensed under the GPL-2 or later
6 */
7
8#include <linux/types.h>
9#include <linux/kernel.h>
10#include <linux/ptrace.h>
11
12const char * const greg_names[] = {
13 "R0", "R1", "R2", "R3", "R4", "R5", "R6", "R7",
14 "P0", "P1", "P2", "P3", "P4", "P5", "SP", "FP",
15 "I0", "I1", "I2", "I3", "M0", "M1", "M2", "M3",
16 "B0", "B1", "B2", "B3", "L0", "L1", "L2", "L3",
17 "A0.X", "A0.W", "A1.X", "A1.W", "<res>", "<res>", "ASTAT", "RETS",
18 "<res>", "<res>", "<res>", "<res>", "<res>", "<res>", "<res>", "<res>",
19 "LC0", "LT0", "LB0", "LC1", "LT1", "LB1", "CYCLES", "CYCLES2",
20 "USP", "SEQSTAT", "SYSCFG", "RETI", "RETX", "RETN", "RETE", "EMUDAT",
21};
22
23static const char *get_allreg_name(int grp, int reg)
24{
25 return greg_names[(grp << 3) | reg];
26}
27
28/*
29 * Unfortunately, the pt_regs structure is not laid out the same way as the
30 * hardware register file, so we need to do some fix ups.
31 *
32 * CYCLES is not stored in the pt_regs structure - so, we just read it from
33 * the hardware.
34 *
35 * Don't support:
36 * - All reserved registers
37 * - All in group 7 are (supervisors only)
38 */
39
40static bool fix_up_reg(struct pt_regs *fp, long *value, int grp, int reg)
41{
42 long *val = &fp->r0;
43 unsigned long tmp;
44
45 /* Only do Dregs and Pregs for now */
46 if (grp == 5 ||
47 (grp == 4 && (reg == 4 || reg == 5)) ||
48 (grp == 7))
49 return false;
50
51 if (grp == 0 || (grp == 1 && reg < 6))
52 val -= (reg + 8 * grp);
53 else if (grp == 1 && reg == 6)
54 val = &fp->usp;
55 else if (grp == 1 && reg == 7)
56 val = &fp->fp;
57 else if (grp == 2) {
58 val = &fp->i0;
59 val -= reg;
60 } else if (grp == 3 && reg >= 4) {
61 val = &fp->l0;
62 val -= (reg - 4);
63 } else if (grp == 3 && reg < 4) {
64 val = &fp->b0;
65 val -= reg;
66 } else if (grp == 4 && reg < 4) {
67 val = &fp->a0x;
68 val -= reg;
69 } else if (grp == 4 && reg == 6)
70 val = &fp->astat;
71 else if (grp == 4 && reg == 7)
72 val = &fp->rets;
73 else if (grp == 6 && reg < 6) {
74 val = &fp->lc0;
75 val -= reg;
76 } else if (grp == 6 && reg == 6) {
77 __asm__ __volatile__("%0 = cycles;\n" : "=d"(tmp));
78 val = &tmp;
79 } else if (grp == 6 && reg == 7) {
80 __asm__ __volatile__("%0 = cycles2;\n" : "=d"(tmp));
81 val = &tmp;
82 }
83
84 *value = *val;
85 return true;
86
87}
88
89#define PseudoDbg_Assert_opcode 0xf0000000
90#define PseudoDbg_Assert_expected_bits 0
91#define PseudoDbg_Assert_expected_mask 0xffff
92#define PseudoDbg_Assert_regtest_bits 16
93#define PseudoDbg_Assert_regtest_mask 0x7
94#define PseudoDbg_Assert_grp_bits 19
95#define PseudoDbg_Assert_grp_mask 0x7
96#define PseudoDbg_Assert_dbgop_bits 22
97#define PseudoDbg_Assert_dbgop_mask 0x3
98#define PseudoDbg_Assert_dontcare_bits 24
99#define PseudoDbg_Assert_dontcare_mask 0x7
100#define PseudoDbg_Assert_code_bits 27
101#define PseudoDbg_Assert_code_mask 0x1f
102
103/*
104 * DBGA - debug assert
105 */
106bool execute_pseudodbg_assert(struct pt_regs *fp, unsigned int opcode)
107{
108 int expected = ((opcode >> PseudoDbg_Assert_expected_bits) & PseudoDbg_Assert_expected_mask);
109 int dbgop = ((opcode >> (PseudoDbg_Assert_dbgop_bits)) & PseudoDbg_Assert_dbgop_mask);
110 int grp = ((opcode >> (PseudoDbg_Assert_grp_bits)) & PseudoDbg_Assert_grp_mask);
111 int regtest = ((opcode >> (PseudoDbg_Assert_regtest_bits)) & PseudoDbg_Assert_regtest_mask);
112 long value;
113
114 if ((opcode & 0xFF000000) != PseudoDbg_Assert_opcode)
115 return false;
116
117 if (!fix_up_reg(fp, &value, grp, regtest))
118 return false;
119
120 if (dbgop == 0 || dbgop == 2) {
121 /* DBGA ( regs_lo , uimm16 ) */
122 /* DBGAL ( regs , uimm16 ) */
123 if (expected != (value & 0xFFFF)) {
124 pr_notice("DBGA (%s.L,0x%x) failure, got 0x%x\n",
125 get_allreg_name(grp, regtest),
126 expected, (unsigned int)(value & 0xFFFF));
127 return false;
128 }
129
130 } else if (dbgop == 1 || dbgop == 3) {
131 /* DBGA ( regs_hi , uimm16 ) */
132 /* DBGAH ( regs , uimm16 ) */
133 if (expected != ((value >> 16) & 0xFFFF)) {
134 pr_notice("DBGA (%s.H,0x%x) failure, got 0x%x\n",
135 get_allreg_name(grp, regtest),
136 expected, (unsigned int)((value >> 16) & 0xFFFF));
137 return false;
138 }
139 }
140
141 fp->pc += 4;
142 return true;
143}
144
145#define PseudoDbg_opcode 0xf8000000
146#define PseudoDbg_reg_bits 0
147#define PseudoDbg_reg_mask 0x7
148#define PseudoDbg_grp_bits 3
149#define PseudoDbg_grp_mask 0x7
150#define PseudoDbg_fn_bits 6
151#define PseudoDbg_fn_mask 0x3
152#define PseudoDbg_code_bits 8
153#define PseudoDbg_code_mask 0xff
154
155/*
156 * DBG - debug (dump a register value out)
157 */
158bool execute_pseudodbg(struct pt_regs *fp, unsigned int opcode)
159{
160 int grp, fn, reg;
161 long value, value1;
162
163 if ((opcode & 0xFF000000) != PseudoDbg_opcode)
164 return false;
165
166 opcode >>= 16;
167 grp = ((opcode >> PseudoDbg_grp_bits) & PseudoDbg_reg_mask);
168 fn = ((opcode >> PseudoDbg_fn_bits) & PseudoDbg_fn_mask);
169 reg = ((opcode >> PseudoDbg_reg_bits) & PseudoDbg_reg_mask);
170
171 if (fn == 3 && (reg == 0 || reg == 1)) {
172 if (!fix_up_reg(fp, &value, 4, 2 * reg))
173 return false;
174 if (!fix_up_reg(fp, &value1, 4, 2 * reg + 1))
175 return false;
176
177 pr_notice("DBG A%i = %02lx%08lx\n", reg, value & 0xFF, value1);
178 fp->pc += 2;
179 return true;
180
181 } else if (fn == 0) {
182 if (!fix_up_reg(fp, &value, grp, reg))
183 return false;
184
185 pr_notice("DBG %s = %08lx\n", get_allreg_name(grp, reg), value);
186 fp->pc += 2;
187 return true;
188 }
189
190 return false;
191}
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index 8e2efceb364b..d37a397f43f5 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -1,5 +1,5 @@
1/* 1/*
2 * Copyright 2004-2009 Analog Devices Inc. 2 * Copyright 2004-2010 Analog Devices Inc.
3 * 3 *
4 * Licensed under the GPL-2 or later. 4 * Licensed under the GPL-2 or later.
5 */ 5 */
@@ -925,7 +925,7 @@ void __init setup_arch(char **cmdline_p)
925 else if (_bfin_swrst & RESET_SOFTWARE) 925 else if (_bfin_swrst & RESET_SOFTWARE)
926 printk(KERN_NOTICE "Reset caused by Software reset\n"); 926 printk(KERN_NOTICE "Reset caused by Software reset\n");
927 927
928 printk(KERN_INFO "Blackfin support (C) 2004-2009 Analog Devices, Inc.\n"); 928 printk(KERN_INFO "Blackfin support (C) 2004-2010 Analog Devices, Inc.\n");
929 if (bfin_compiled_revid() == 0xffff) 929 if (bfin_compiled_revid() == 0xffff)
930 printk(KERN_INFO "Compiled for ADSP-%s Rev any, running on 0.%d\n", CPU, bfin_revid()); 930 printk(KERN_INFO "Compiled for ADSP-%s Rev any, running on 0.%d\n", CPU, bfin_revid());
931 else if (bfin_compiled_revid() == -1) 931 else if (bfin_compiled_revid() == -1)
diff --git a/arch/blackfin/kernel/sys_bfin.c b/arch/blackfin/kernel/sys_bfin.c
index 2e7f8e10bf87..bdc1e2f0da32 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,
47} 47}
48EXPORT_SYMBOL(get_fb_unmapped_area); 48EXPORT_SYMBOL(get_fb_unmapped_area);
49#endif 49#endif
50
51/* Needed for legacy userspace atomic emulation */
52static DEFINE_SPINLOCK(bfin_spinlock_lock);
53
54#ifdef CONFIG_SYS_BFIN_SPINLOCK_L1
55__attribute__((l1_text))
56#endif
57asmlinkage int sys_bfin_spinlock(int *p)
58{
59 int ret, tmp = 0;
60
61 spin_lock(&bfin_spinlock_lock); /* This would also hold kernel preemption. */
62 ret = get_user(tmp, p);
63 if (likely(ret == 0)) {
64 if (unlikely(tmp))
65 ret = 1;
66 else
67 put_user(1, p);
68 }
69 spin_unlock(&bfin_spinlock_lock);
70
71 return ret;
72}
diff --git a/arch/blackfin/kernel/trace.c b/arch/blackfin/kernel/trace.c
new file mode 100644
index 000000000000..59fcdf6b0138
--- /dev/null
+++ b/arch/blackfin/kernel/trace.c
@@ -0,0 +1,981 @@
1/* provide some functions which dump the trace buffer, in a nice way for people
2 * to read it, and understand what is going on
3 *
4 * Copyright 2004-2010 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later
7 */
8
9#include <linux/kernel.h>
10#include <linux/hardirq.h>
11#include <linux/thread_info.h>
12#include <linux/mm.h>
13#include <linux/uaccess.h>
14#include <linux/module.h>
15#include <linux/kallsyms.h>
16#include <linux/err.h>
17#include <linux/fs.h>
18#include <asm/dma.h>
19#include <asm/trace.h>
20#include <asm/fixed_code.h>
21#include <asm/traps.h>
22#include <asm/irq_handler.h>
23
24void decode_address(char *buf, unsigned long address)
25{
26 struct task_struct *p;
27 struct mm_struct *mm;
28 unsigned long flags, offset;
29 unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic();
30 struct rb_node *n;
31
32#ifdef CONFIG_KALLSYMS
33 unsigned long symsize;
34 const char *symname;
35 char *modname;
36 char *delim = ":";
37 char namebuf[128];
38#endif
39
40 buf += sprintf(buf, "<0x%08lx> ", address);
41
42#ifdef CONFIG_KALLSYMS
43 /* look up the address and see if we are in kernel space */
44 symname = kallsyms_lookup(address, &symsize, &offset, &modname, namebuf);
45
46 if (symname) {
47 /* yeah! kernel space! */
48 if (!modname)
49 modname = delim = "";
50 sprintf(buf, "{ %s%s%s%s + 0x%lx }",
51 delim, modname, delim, symname,
52 (unsigned long)offset);
53 return;
54 }
55#endif
56
57 if (address >= FIXED_CODE_START && address < FIXED_CODE_END) {
58 /* Problem in fixed code section? */
59 strcat(buf, "/* Maybe fixed code section */");
60 return;
61
62 } else if (address < CONFIG_BOOT_LOAD) {
63 /* Problem somewhere before the kernel start address */
64 strcat(buf, "/* Maybe null pointer? */");
65 return;
66
67 } else if (address >= COREMMR_BASE) {
68 strcat(buf, "/* core mmrs */");
69 return;
70
71 } else if (address >= SYSMMR_BASE) {
72 strcat(buf, "/* system mmrs */");
73 return;
74
75 } else if (address >= L1_ROM_START && address < L1_ROM_START + L1_ROM_LENGTH) {
76 strcat(buf, "/* on-chip L1 ROM */");
77 return;
78
79 } else if (address >= L1_SCRATCH_START && address < L1_SCRATCH_START + L1_SCRATCH_LENGTH) {
80 strcat(buf, "/* on-chip scratchpad */");
81 return;
82
83 } else if (address >= physical_mem_end && address < ASYNC_BANK0_BASE) {
84 strcat(buf, "/* unconnected memory */");
85 return;
86
87 } else if (address >= ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE && address < BOOT_ROM_START) {
88 strcat(buf, "/* reserved memory */");
89 return;
90
91 } else if (address >= L1_DATA_A_START && address < L1_DATA_A_START + L1_DATA_A_LENGTH) {
92 strcat(buf, "/* on-chip Data Bank A */");
93 return;
94
95 } else if (address >= L1_DATA_B_START && address < L1_DATA_B_START + L1_DATA_B_LENGTH) {
96 strcat(buf, "/* on-chip Data Bank B */");
97 return;
98 }
99
100 /*
101 * Don't walk any of the vmas if we are oopsing, it has been known
102 * to cause problems - corrupt vmas (kernel crashes) cause double faults
103 */
104 if (oops_in_progress) {
105 strcat(buf, "/* kernel dynamic memory (maybe user-space) */");
106 return;
107 }
108
109 /* looks like we're off in user-land, so let's walk all the
110 * mappings of all our processes and see if we can't be a whee
111 * bit more specific
112 */
113 write_lock_irqsave(&tasklist_lock, flags);
114 for_each_process(p) {
115 mm = (in_atomic ? p->mm : get_task_mm(p));
116 if (!mm)
117 continue;
118
119 if (!down_read_trylock(&mm->mmap_sem)) {
120 if (!in_atomic)
121 mmput(mm);
122 continue;
123 }
124
125 for (n = rb_first(&mm->mm_rb); n; n = rb_next(n)) {
126 struct vm_area_struct *vma;
127
128 vma = rb_entry(n, struct vm_area_struct, vm_rb);
129
130 if (address >= vma->vm_start && address < vma->vm_end) {
131 char _tmpbuf[256];
132 char *name = p->comm;
133 struct file *file = vma->vm_file;
134
135 if (file) {
136 char *d_name = d_path(&file->f_path, _tmpbuf,
137 sizeof(_tmpbuf));
138 if (!IS_ERR(d_name))
139 name = d_name;
140 }
141
142 /* FLAT does not have its text aligned to the start of
143 * the map while FDPIC ELF does ...
144 */
145
146 /* before we can check flat/fdpic, we need to
147 * make sure current is valid
148 */
149 if ((unsigned long)current >= FIXED_CODE_START &&
150 !((unsigned long)current & 0x3)) {
151 if (current->mm &&
152 (address > current->mm->start_code) &&
153 (address < current->mm->end_code))
154 offset = address - current->mm->start_code;
155 else
156 offset = (address - vma->vm_start) +
157 (vma->vm_pgoff << PAGE_SHIFT);
158
159 sprintf(buf, "[ %s + 0x%lx ]", name, offset);
160 } else
161 sprintf(buf, "[ %s vma:0x%lx-0x%lx]",
162 name, vma->vm_start, vma->vm_end);
163
164 up_read(&mm->mmap_sem);
165 if (!in_atomic)
166 mmput(mm);
167
168 if (buf[0] == '\0')
169 sprintf(buf, "[ %s ] dynamic memory", name);
170
171 goto done;
172 }
173 }
174
175 up_read(&mm->mmap_sem);
176 if (!in_atomic)
177 mmput(mm);
178 }
179
180 /*
181 * we were unable to find this address anywhere,
182 * or some MMs were skipped because they were in use.
183 */
184 sprintf(buf, "/* kernel dynamic memory */");
185
186done:
187 write_unlock_irqrestore(&tasklist_lock, flags);
188}
189
190#define EXPAND_LEN ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN) * 256 - 1)
191
192/*
193 * Similar to get_user, do some address checking, then dereference
194 * Return true on success, false on bad address
195 */
196bool get_mem16(unsigned short *val, unsigned short *address)
197{
198 unsigned long addr = (unsigned long)address;
199
200 /* Check for odd addresses */
201 if (addr & 0x1)
202 return false;
203
204 switch (bfin_mem_access_type(addr, 2)) {
205 case BFIN_MEM_ACCESS_CORE:
206 case BFIN_MEM_ACCESS_CORE_ONLY:
207 *val = *address;
208 return true;
209 case BFIN_MEM_ACCESS_DMA:
210 dma_memcpy(val, address, 2);
211 return true;
212 case BFIN_MEM_ACCESS_ITEST:
213 isram_memcpy(val, address, 2);
214 return true;
215 default: /* invalid access */
216 return false;
217 }
218}
219
220bool get_instruction(unsigned int *val, unsigned short *address)
221{
222 unsigned long addr = (unsigned long)address;
223 unsigned short opcode0, opcode1;
224
225 /* Check for odd addresses */
226 if (addr & 0x1)
227 return false;
228
229 /* MMR region will never have instructions */
230 if (addr >= SYSMMR_BASE)
231 return false;
232
233 /* Scratchpad will never have instructions */
234 if (addr >= L1_SCRATCH_START && addr < L1_SCRATCH_START + L1_SCRATCH_LENGTH)
235 return false;
236
237 /* Data banks will never have instructions */
238 if (addr >= BOOT_ROM_START + BOOT_ROM_LENGTH && addr < L1_CODE_START)
239 return false;
240
241 if (!get_mem16(&opcode0, address))
242 return false;
243
244 /* was this a 32-bit instruction? If so, get the next 16 bits */
245 if ((opcode0 & 0xc000) == 0xc000) {
246 if (!get_mem16(&opcode1, address + 1))
247 return false;
248 *val = (opcode0 << 16) + opcode1;
249 } else
250 *val = opcode0;
251
252 return true;
253}
254
255#if defined(CONFIG_DEBUG_BFIN_HWTRACE_ON)
256/*
257 * decode the instruction if we are printing out the trace, as it
258 * makes things easier to follow, without running it through objdump
259 * Decode the change of flow, and the common load/store instructions
260 * which are the main cause for faults, and discontinuities in the trace
261 * buffer.
262 */
263
264#define ProgCtrl_opcode 0x0000
265#define ProgCtrl_poprnd_bits 0
266#define ProgCtrl_poprnd_mask 0xf
267#define ProgCtrl_prgfunc_bits 4
268#define ProgCtrl_prgfunc_mask 0xf
269#define ProgCtrl_code_bits 8
270#define ProgCtrl_code_mask 0xff
271
272static void decode_ProgCtrl_0(unsigned int opcode)
273{
274 int poprnd = ((opcode >> ProgCtrl_poprnd_bits) & ProgCtrl_poprnd_mask);
275 int prgfunc = ((opcode >> ProgCtrl_prgfunc_bits) & ProgCtrl_prgfunc_mask);
276
277 if (prgfunc == 0 && poprnd == 0)
278 pr_cont("NOP");
279 else if (prgfunc == 1 && poprnd == 0)
280 pr_cont("RTS");
281 else if (prgfunc == 1 && poprnd == 1)
282 pr_cont("RTI");
283 else if (prgfunc == 1 && poprnd == 2)
284 pr_cont("RTX");
285 else if (prgfunc == 1 && poprnd == 3)
286 pr_cont("RTN");
287 else if (prgfunc == 1 && poprnd == 4)
288 pr_cont("RTE");
289 else if (prgfunc == 2 && poprnd == 0)
290 pr_cont("IDLE");
291 else if (prgfunc == 2 && poprnd == 3)
292 pr_cont("CSYNC");
293 else if (prgfunc == 2 && poprnd == 4)
294 pr_cont("SSYNC");
295 else if (prgfunc == 2 && poprnd == 5)
296 pr_cont("EMUEXCPT");
297 else if (prgfunc == 3)
298 pr_cont("CLI R%i", poprnd);
299 else if (prgfunc == 4)
300 pr_cont("STI R%i", poprnd);
301 else if (prgfunc == 5)
302 pr_cont("JUMP (P%i)", poprnd);
303 else if (prgfunc == 6)
304 pr_cont("CALL (P%i)", poprnd);
305 else if (prgfunc == 7)
306 pr_cont("CALL (PC + P%i)", poprnd);
307 else if (prgfunc == 8)
308 pr_cont("JUMP (PC + P%i", poprnd);
309 else if (prgfunc == 9)
310 pr_cont("RAISE %i", poprnd);
311 else if (prgfunc == 10)
312 pr_cont("EXCPT %i", poprnd);
313 else
314 pr_cont("0x%04x", opcode);
315
316}
317
318#define BRCC_opcode 0x1000
319#define BRCC_offset_bits 0
320#define BRCC_offset_mask 0x3ff
321#define BRCC_B_bits 10
322#define BRCC_B_mask 0x1
323#define BRCC_T_bits 11
324#define BRCC_T_mask 0x1
325#define BRCC_code_bits 12
326#define BRCC_code_mask 0xf
327
328static void decode_BRCC_0(unsigned int opcode)
329{
330 int B = ((opcode >> BRCC_B_bits) & BRCC_B_mask);
331 int T = ((opcode >> BRCC_T_bits) & BRCC_T_mask);
332
333 pr_cont("IF %sCC JUMP pcrel %s", T ? "" : "!", B ? "(BP)" : "");
334}
335
336#define CALLa_opcode 0xe2000000
337#define CALLa_addr_bits 0
338#define CALLa_addr_mask 0xffffff
339#define CALLa_S_bits 24
340#define CALLa_S_mask 0x1
341#define CALLa_code_bits 25
342#define CALLa_code_mask 0x7f
343
344static void decode_CALLa_0(unsigned int opcode)
345{
346 int S = ((opcode >> (CALLa_S_bits - 16)) & CALLa_S_mask);
347
348 if (S)
349 pr_cont("CALL pcrel");
350 else
351 pr_cont("JUMP.L");
352}
353
354#define LoopSetup_opcode 0xe0800000
355#define LoopSetup_eoffset_bits 0
356#define LoopSetup_eoffset_mask 0x3ff
357#define LoopSetup_dontcare_bits 10
358#define LoopSetup_dontcare_mask 0x3
359#define LoopSetup_reg_bits 12
360#define LoopSetup_reg_mask 0xf
361#define LoopSetup_soffset_bits 16
362#define LoopSetup_soffset_mask 0xf
363#define LoopSetup_c_bits 20
364#define LoopSetup_c_mask 0x1
365#define LoopSetup_rop_bits 21
366#define LoopSetup_rop_mask 0x3
367#define LoopSetup_code_bits 23
368#define LoopSetup_code_mask 0x1ff
369
370static void decode_LoopSetup_0(unsigned int opcode)
371{
372 int c = ((opcode >> LoopSetup_c_bits) & LoopSetup_c_mask);
373 int reg = ((opcode >> LoopSetup_reg_bits) & LoopSetup_reg_mask);
374 int rop = ((opcode >> LoopSetup_rop_bits) & LoopSetup_rop_mask);
375
376 pr_cont("LSETUP <> LC%i", c);
377 if ((rop & 1) == 1)
378 pr_cont("= P%i", reg);
379 if ((rop & 2) == 2)
380 pr_cont(" >> 0x1");
381}
382
383#define DspLDST_opcode 0x9c00
384#define DspLDST_reg_bits 0
385#define DspLDST_reg_mask 0x7
386#define DspLDST_i_bits 3
387#define DspLDST_i_mask 0x3
388#define DspLDST_m_bits 5
389#define DspLDST_m_mask 0x3
390#define DspLDST_aop_bits 7
391#define DspLDST_aop_mask 0x3
392#define DspLDST_W_bits 9
393#define DspLDST_W_mask 0x1
394#define DspLDST_code_bits 10
395#define DspLDST_code_mask 0x3f
396
397static void decode_dspLDST_0(unsigned int opcode)
398{
399 int i = ((opcode >> DspLDST_i_bits) & DspLDST_i_mask);
400 int m = ((opcode >> DspLDST_m_bits) & DspLDST_m_mask);
401 int W = ((opcode >> DspLDST_W_bits) & DspLDST_W_mask);
402 int aop = ((opcode >> DspLDST_aop_bits) & DspLDST_aop_mask);
403 int reg = ((opcode >> DspLDST_reg_bits) & DspLDST_reg_mask);
404
405 if (W == 0) {
406 pr_cont("R%i", reg);
407 switch (m) {
408 case 0:
409 pr_cont(" = ");
410 break;
411 case 1:
412 pr_cont(".L = ");
413 break;
414 case 2:
415 pr_cont(".W = ");
416 break;
417 }
418 }
419
420 pr_cont("[ I%i", i);
421
422 switch (aop) {
423 case 0:
424 pr_cont("++ ]");
425 break;
426 case 1:
427 pr_cont("-- ]");
428 break;
429 }
430
431 if (W == 1) {
432 pr_cont(" = R%i", reg);
433 switch (m) {
434 case 1:
435 pr_cont(".L = ");
436 break;
437 case 2:
438 pr_cont(".W = ");
439 break;
440 }
441 }
442}
443
444#define LDST_opcode 0x9000
445#define LDST_reg_bits 0
446#define LDST_reg_mask 0x7
447#define LDST_ptr_bits 3
448#define LDST_ptr_mask 0x7
449#define LDST_Z_bits 6
450#define LDST_Z_mask 0x1
451#define LDST_aop_bits 7
452#define LDST_aop_mask 0x3
453#define LDST_W_bits 9
454#define LDST_W_mask 0x1
455#define LDST_sz_bits 10
456#define LDST_sz_mask 0x3
457#define LDST_code_bits 12
458#define LDST_code_mask 0xf
459
460static void decode_LDST_0(unsigned int opcode)
461{
462 int Z = ((opcode >> LDST_Z_bits) & LDST_Z_mask);
463 int W = ((opcode >> LDST_W_bits) & LDST_W_mask);
464 int sz = ((opcode >> LDST_sz_bits) & LDST_sz_mask);
465 int aop = ((opcode >> LDST_aop_bits) & LDST_aop_mask);
466 int reg = ((opcode >> LDST_reg_bits) & LDST_reg_mask);
467 int ptr = ((opcode >> LDST_ptr_bits) & LDST_ptr_mask);
468
469 if (W == 0)
470 pr_cont("%s%i = ", (sz == 0 && Z == 1) ? "P" : "R", reg);
471
472 switch (sz) {
473 case 1:
474 pr_cont("W");
475 break;
476 case 2:
477 pr_cont("B");
478 break;
479 }
480
481 pr_cont("[P%i", ptr);
482
483 switch (aop) {
484 case 0:
485 pr_cont("++");
486 break;
487 case 1:
488 pr_cont("--");
489 break;
490 }
491 pr_cont("]");
492
493 if (W == 1)
494 pr_cont(" = %s%i ", (sz == 0 && Z == 1) ? "P" : "R", reg);
495
496 if (sz) {
497 if (Z)
498 pr_cont(" (X)");
499 else
500 pr_cont(" (Z)");
501 }
502}
503
504#define LDSTii_opcode 0xa000
505#define LDSTii_reg_bit 0
506#define LDSTii_reg_mask 0x7
507#define LDSTii_ptr_bit 3
508#define LDSTii_ptr_mask 0x7
509#define LDSTii_offset_bit 6
510#define LDSTii_offset_mask 0xf
511#define LDSTii_op_bit 10
512#define LDSTii_op_mask 0x3
513#define LDSTii_W_bit 12
514#define LDSTii_W_mask 0x1
515#define LDSTii_code_bit 13
516#define LDSTii_code_mask 0x7
517
518static void decode_LDSTii_0(unsigned int opcode)
519{
520 int reg = ((opcode >> LDSTii_reg_bit) & LDSTii_reg_mask);
521 int ptr = ((opcode >> LDSTii_ptr_bit) & LDSTii_ptr_mask);
522 int offset = ((opcode >> LDSTii_offset_bit) & LDSTii_offset_mask);
523 int op = ((opcode >> LDSTii_op_bit) & LDSTii_op_mask);
524 int W = ((opcode >> LDSTii_W_bit) & LDSTii_W_mask);
525
526 if (W == 0) {
527 pr_cont("%s%i = %s[P%i + %i]", op == 3 ? "R" : "P", reg,
528 op == 1 || op == 2 ? "" : "W", ptr, offset);
529 if (op == 2)
530 pr_cont("(Z)");
531 if (op == 3)
532 pr_cont("(X)");
533 } else {
534 pr_cont("%s[P%i + %i] = %s%i", op == 0 ? "" : "W", ptr,
535 offset, op == 3 ? "P" : "R", reg);
536 }
537}
538
539#define LDSTidxI_opcode 0xe4000000
540#define LDSTidxI_offset_bits 0
541#define LDSTidxI_offset_mask 0xffff
542#define LDSTidxI_reg_bits 16
543#define LDSTidxI_reg_mask 0x7
544#define LDSTidxI_ptr_bits 19
545#define LDSTidxI_ptr_mask 0x7
546#define LDSTidxI_sz_bits 22
547#define LDSTidxI_sz_mask 0x3
548#define LDSTidxI_Z_bits 24
549#define LDSTidxI_Z_mask 0x1
550#define LDSTidxI_W_bits 25
551#define LDSTidxI_W_mask 0x1
552#define LDSTidxI_code_bits 26
553#define LDSTidxI_code_mask 0x3f
554
555static void decode_LDSTidxI_0(unsigned int opcode)
556{
557 int Z = ((opcode >> LDSTidxI_Z_bits) & LDSTidxI_Z_mask);
558 int W = ((opcode >> LDSTidxI_W_bits) & LDSTidxI_W_mask);
559 int sz = ((opcode >> LDSTidxI_sz_bits) & LDSTidxI_sz_mask);
560 int reg = ((opcode >> LDSTidxI_reg_bits) & LDSTidxI_reg_mask);
561 int ptr = ((opcode >> LDSTidxI_ptr_bits) & LDSTidxI_ptr_mask);
562 int offset = ((opcode >> LDSTidxI_offset_bits) & LDSTidxI_offset_mask);
563
564 if (W == 0)
565 pr_cont("%s%i = ", sz == 0 && Z == 1 ? "P" : "R", reg);
566
567 if (sz == 1)
568 pr_cont("W");
569 if (sz == 2)
570 pr_cont("B");
571
572 pr_cont("[P%i + %s0x%x]", ptr, offset & 0x20 ? "-" : "",
573 (offset & 0x1f) << 2);
574
575 if (W == 0 && sz != 0) {
576 if (Z)
577 pr_cont("(X)");
578 else
579 pr_cont("(Z)");
580 }
581
582 if (W == 1)
583 pr_cont("= %s%i", (sz == 0 && Z == 1) ? "P" : "R", reg);
584
585}
586
587static void decode_opcode(unsigned int opcode)
588{
589#ifdef CONFIG_BUG
590 if (opcode == BFIN_BUG_OPCODE)
591 pr_cont("BUG");
592 else
593#endif
594 if ((opcode & 0xffffff00) == ProgCtrl_opcode)
595 decode_ProgCtrl_0(opcode);
596 else if ((opcode & 0xfffff000) == BRCC_opcode)
597 decode_BRCC_0(opcode);
598 else if ((opcode & 0xfffff000) == 0x2000)
599 pr_cont("JUMP.S");
600 else if ((opcode & 0xfe000000) == CALLa_opcode)
601 decode_CALLa_0(opcode);
602 else if ((opcode & 0xff8000C0) == LoopSetup_opcode)
603 decode_LoopSetup_0(opcode);
604 else if ((opcode & 0xfffffc00) == DspLDST_opcode)
605 decode_dspLDST_0(opcode);
606 else if ((opcode & 0xfffff000) == LDST_opcode)
607 decode_LDST_0(opcode);
608 else if ((opcode & 0xffffe000) == LDSTii_opcode)
609 decode_LDSTii_0(opcode);
610 else if ((opcode & 0xfc000000) == LDSTidxI_opcode)
611 decode_LDSTidxI_0(opcode);
612 else if (opcode & 0xffff0000)
613 pr_cont("0x%08x", opcode);
614 else
615 pr_cont("0x%04x", opcode);
616}
617
618#define BIT_MULTI_INS 0x08000000
619static void decode_instruction(unsigned short *address)
620{
621 unsigned int opcode;
622
623 if (!get_instruction(&opcode, address))
624 return;
625
626 decode_opcode(opcode);
627
628 /* If things are a 32-bit instruction, it has the possibility of being
629 * a multi-issue instruction (a 32-bit, and 2 16 bit instrucitions)
630 * This test collidates with the unlink instruction, so disallow that
631 */
632 if ((opcode & 0xc0000000) == 0xc0000000 &&
633 (opcode & BIT_MULTI_INS) &&
634 (opcode & 0xe8000000) != 0xe8000000) {
635 pr_cont(" || ");
636 if (!get_instruction(&opcode, address + 2))
637 return;
638 decode_opcode(opcode);
639 pr_cont(" || ");
640 if (!get_instruction(&opcode, address + 3))
641 return;
642 decode_opcode(opcode);
643 }
644}
645#endif
646
647void dump_bfin_trace_buffer(void)
648{
649#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
650 int tflags, i = 0, fault = 0;
651 char buf[150];
652 unsigned short *addr;
653 unsigned int cpu = raw_smp_processor_id();
654#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
655 int j, index;
656#endif
657
658 trace_buffer_save(tflags);
659
660 pr_notice("Hardware Trace:\n");
661
662#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
663 pr_notice("WARNING: Expanded trace turned on - can not trace exceptions\n");
664#endif
665
666 if (likely(bfin_read_TBUFSTAT() & TBUFCNT)) {
667 for (; bfin_read_TBUFSTAT() & TBUFCNT; i++) {
668 addr = (unsigned short *)bfin_read_TBUF();
669 decode_address(buf, (unsigned long)addr);
670 pr_notice("%4i Target : %s\n", i, buf);
671 /* Normally, the faulting instruction doesn't go into
672 * the trace buffer, (since it doesn't commit), so
673 * we print out the fault address here
674 */
675 if (!fault && addr == ((unsigned short *)evt_ivhw)) {
676 addr = (unsigned short *)bfin_read_TBUF();
677 decode_address(buf, (unsigned long)addr);
678 pr_notice(" FAULT : %s ", buf);
679 decode_instruction(addr);
680 pr_cont("\n");
681 fault = 1;
682 continue;
683 }
684 if (!fault && addr == (unsigned short *)trap &&
685 (cpu_pda[cpu].seqstat & SEQSTAT_EXCAUSE) > VEC_EXCPT15) {
686 decode_address(buf, cpu_pda[cpu].icplb_fault_addr);
687 pr_notice(" FAULT : %s ", buf);
688 decode_instruction((unsigned short *)cpu_pda[cpu].icplb_fault_addr);
689 pr_cont("\n");
690 fault = 1;
691 }
692 addr = (unsigned short *)bfin_read_TBUF();
693 decode_address(buf, (unsigned long)addr);
694 pr_notice(" Source : %s ", buf);
695 decode_instruction(addr);
696 pr_cont("\n");
697 }
698 }
699
700#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
701 if (trace_buff_offset)
702 index = trace_buff_offset / 4;
703 else
704 index = EXPAND_LEN;
705
706 j = (1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN) * 128;
707 while (j) {
708 decode_address(buf, software_trace_buff[index]);
709 pr_notice("%4i Target : %s\n", i, buf);
710 index -= 1;
711 if (index < 0)
712 index = EXPAND_LEN;
713 decode_address(buf, software_trace_buff[index]);
714 pr_notice(" Source : %s ", buf);
715 decode_instruction((unsigned short *)software_trace_buff[index]);
716 pr_cont("\n");
717 index -= 1;
718 if (index < 0)
719 index = EXPAND_LEN;
720 j--;
721 i++;
722 }
723#endif
724
725 trace_buffer_restore(tflags);
726#endif
727}
728EXPORT_SYMBOL(dump_bfin_trace_buffer);
729
730void dump_bfin_process(struct pt_regs *fp)
731{
732 /* We should be able to look at fp->ipend, but we don't push it on the
733 * stack all the time, so do this until we fix that */
734 unsigned int context = bfin_read_IPEND();
735
736 if (oops_in_progress)
737 pr_emerg("Kernel OOPS in progress\n");
738
739 if (context & 0x0020 && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR)
740 pr_notice("HW Error context\n");
741 else if (context & 0x0020)
742 pr_notice("Deferred Exception context\n");
743 else if (context & 0x3FC0)
744 pr_notice("Interrupt context\n");
745 else if (context & 0x4000)
746 pr_notice("Deferred Interrupt context\n");
747 else if (context & 0x8000)
748 pr_notice("Kernel process context\n");
749
750 /* Because we are crashing, and pointers could be bad, we check things
751 * pretty closely before we use them
752 */
753 if ((unsigned long)current >= FIXED_CODE_START &&
754 !((unsigned long)current & 0x3) && current->pid) {
755 pr_notice("CURRENT PROCESS:\n");
756 if (current->comm >= (char *)FIXED_CODE_START)
757 pr_notice("COMM=%s PID=%d",
758 current->comm, current->pid);
759 else
760 pr_notice("COMM= invalid");
761
762 pr_cont(" CPU=%d\n", current_thread_info()->cpu);
763 if (!((unsigned long)current->mm & 0x3) &&
764 (unsigned long)current->mm >= FIXED_CODE_START) {
765 pr_notice("TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n",
766 (void *)current->mm->start_code,
767 (void *)current->mm->end_code,
768 (void *)current->mm->start_data,
769 (void *)current->mm->end_data);
770 pr_notice(" BSS = 0x%p-0x%p USER-STACK = 0x%p\n\n",
771 (void *)current->mm->end_data,
772 (void *)current->mm->brk,
773 (void *)current->mm->start_stack);
774 } else
775 pr_notice("invalid mm\n");
776 } else
777 pr_notice("No Valid process in current context\n");
778}
779
780void dump_bfin_mem(struct pt_regs *fp)
781{
782 unsigned short *addr, *erraddr, val = 0, err = 0;
783 char sti = 0, buf[6];
784
785 erraddr = (void *)fp->pc;
786
787 pr_notice("return address: [0x%p]; contents of:", erraddr);
788
789 for (addr = (unsigned short *)((unsigned long)erraddr & ~0xF) - 0x10;
790 addr < (unsigned short *)((unsigned long)erraddr & ~0xF) + 0x10;
791 addr++) {
792 if (!((unsigned long)addr & 0xF))
793 pr_notice("0x%p: ", addr);
794
795 if (!get_mem16(&val, addr)) {
796 val = 0;
797 sprintf(buf, "????");
798 } else
799 sprintf(buf, "%04x", val);
800
801 if (addr == erraddr) {
802 pr_cont("[%s]", buf);
803 err = val;
804 } else
805 pr_cont(" %s ", buf);
806
807 /* Do any previous instructions turn on interrupts? */
808 if (addr <= erraddr && /* in the past */
809 ((val >= 0x0040 && val <= 0x0047) || /* STI instruction */
810 val == 0x017b)) /* [SP++] = RETI */
811 sti = 1;
812 }
813
814 pr_cont("\n");
815
816 /* Hardware error interrupts can be deferred */
817 if (unlikely(sti && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR &&
818 oops_in_progress)){
819 pr_notice("Looks like this was a deferred error - sorry\n");
820#ifndef CONFIG_DEBUG_HWERR
821 pr_notice("The remaining message may be meaningless\n");
822 pr_notice("You should enable CONFIG_DEBUG_HWERR to get a better idea where it came from\n");
823#else
824 /* If we are handling only one peripheral interrupt
825 * and current mm and pid are valid, and the last error
826 * was in that user space process's text area
827 * print it out - because that is where the problem exists
828 */
829 if ((!(((fp)->ipend & ~0x30) & (((fp)->ipend & ~0x30) - 1))) &&
830 (current->pid && current->mm)) {
831 /* And the last RETI points to the current userspace context */
832 if ((fp + 1)->pc >= current->mm->start_code &&
833 (fp + 1)->pc <= current->mm->end_code) {
834 pr_notice("It might be better to look around here :\n");
835 pr_notice("-------------------------------------------\n");
836 show_regs(fp + 1);
837 pr_notice("-------------------------------------------\n");
838 }
839 }
840#endif
841 }
842}
843
844void show_regs(struct pt_regs *fp)
845{
846 char buf[150];
847 struct irqaction *action;
848 unsigned int i;
849 unsigned long flags = 0;
850 unsigned int cpu = raw_smp_processor_id();
851 unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic();
852
853 pr_notice("\n");
854 if (CPUID != bfin_cpuid())
855 pr_notice("Compiled for cpu family 0x%04x (Rev %d), "
856 "but running on:0x%04x (Rev %d)\n",
857 CPUID, bfin_compiled_revid(), bfin_cpuid(), bfin_revid());
858
859 pr_notice("ADSP-%s-0.%d",
860 CPU, bfin_compiled_revid());
861
862 if (bfin_compiled_revid() != bfin_revid())
863 pr_cont("(Detected 0.%d)", bfin_revid());
864
865 pr_cont(" %lu(MHz CCLK) %lu(MHz SCLK) (%s)\n",
866 get_cclk()/1000000, get_sclk()/1000000,
867#ifdef CONFIG_MPU
868 "mpu on"
869#else
870 "mpu off"
871#endif
872 );
873
874 pr_notice("%s", linux_banner);
875
876 pr_notice("\nSEQUENCER STATUS:\t\t%s\n", print_tainted());
877 pr_notice(" SEQSTAT: %08lx IPEND: %04lx IMASK: %04lx SYSCFG: %04lx\n",
878 (long)fp->seqstat, fp->ipend, cpu_pda[raw_smp_processor_id()].ex_imask, fp->syscfg);
879 if (fp->ipend & EVT_IRPTEN)
880 pr_notice(" Global Interrupts Disabled (IPEND[4])\n");
881 if (!(cpu_pda[raw_smp_processor_id()].ex_imask & (EVT_IVG13 | EVT_IVG12 | EVT_IVG11 |
882 EVT_IVG10 | EVT_IVG9 | EVT_IVG8 | EVT_IVG7 | EVT_IVTMR)))
883 pr_notice(" Peripheral interrupts masked off\n");
884 if (!(cpu_pda[raw_smp_processor_id()].ex_imask & (EVT_IVG15 | EVT_IVG14)))
885 pr_notice(" Kernel interrupts masked off\n");
886 if ((fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR) {
887 pr_notice(" HWERRCAUSE: 0x%lx\n",
888 (fp->seqstat & SEQSTAT_HWERRCAUSE) >> 14);
889#ifdef EBIU_ERRMST
890 /* If the error was from the EBIU, print it out */
891 if (bfin_read_EBIU_ERRMST() & CORE_ERROR) {
892 pr_notice(" EBIU Error Reason : 0x%04x\n",
893 bfin_read_EBIU_ERRMST());
894 pr_notice(" EBIU Error Address : 0x%08x\n",
895 bfin_read_EBIU_ERRADD());
896 }
897#endif
898 }
899 pr_notice(" EXCAUSE : 0x%lx\n",
900 fp->seqstat & SEQSTAT_EXCAUSE);
901 for (i = 2; i <= 15 ; i++) {
902 if (fp->ipend & (1 << i)) {
903 if (i != 4) {
904 decode_address(buf, bfin_read32(EVT0 + 4*i));
905 pr_notice(" physical IVG%i asserted : %s\n", i, buf);
906 } else
907 pr_notice(" interrupts disabled\n");
908 }
909 }
910
911 /* if no interrupts are going off, don't print this out */
912 if (fp->ipend & ~0x3F) {
913 for (i = 0; i < (NR_IRQS - 1); i++) {
914 if (!in_atomic)
915 raw_spin_lock_irqsave(&irq_desc[i].lock, flags);
916
917 action = irq_desc[i].action;
918 if (!action)
919 goto unlock;
920
921 decode_address(buf, (unsigned int)action->handler);
922 pr_notice(" logical irq %3d mapped : %s", i, buf);
923 for (action = action->next; action; action = action->next) {
924 decode_address(buf, (unsigned int)action->handler);
925 pr_cont(", %s", buf);
926 }
927 pr_cont("\n");
928unlock:
929 if (!in_atomic)
930 raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags);
931 }
932 }
933
934 decode_address(buf, fp->rete);
935 pr_notice(" RETE: %s\n", buf);
936 decode_address(buf, fp->retn);
937 pr_notice(" RETN: %s\n", buf);
938 decode_address(buf, fp->retx);
939 pr_notice(" RETX: %s\n", buf);
940 decode_address(buf, fp->rets);
941 pr_notice(" RETS: %s\n", buf);
942 decode_address(buf, fp->pc);
943 pr_notice(" PC : %s\n", buf);
944
945 if (((long)fp->seqstat & SEQSTAT_EXCAUSE) &&
946 (((long)fp->seqstat & SEQSTAT_EXCAUSE) != VEC_HWERR)) {
947 decode_address(buf, cpu_pda[cpu].dcplb_fault_addr);
948 pr_notice("DCPLB_FAULT_ADDR: %s\n", buf);
949 decode_address(buf, cpu_pda[cpu].icplb_fault_addr);
950 pr_notice("ICPLB_FAULT_ADDR: %s\n", buf);
951 }
952
953 pr_notice("PROCESSOR STATE:\n");
954 pr_notice(" R0 : %08lx R1 : %08lx R2 : %08lx R3 : %08lx\n",
955 fp->r0, fp->r1, fp->r2, fp->r3);
956 pr_notice(" R4 : %08lx R5 : %08lx R6 : %08lx R7 : %08lx\n",
957 fp->r4, fp->r5, fp->r6, fp->r7);
958 pr_notice(" P0 : %08lx P1 : %08lx P2 : %08lx P3 : %08lx\n",
959 fp->p0, fp->p1, fp->p2, fp->p3);
960 pr_notice(" P4 : %08lx P5 : %08lx FP : %08lx SP : %08lx\n",
961 fp->p4, fp->p5, fp->fp, (long)fp);
962 pr_notice(" LB0: %08lx LT0: %08lx LC0: %08lx\n",
963 fp->lb0, fp->lt0, fp->lc0);
964 pr_notice(" LB1: %08lx LT1: %08lx LC1: %08lx\n",
965 fp->lb1, fp->lt1, fp->lc1);
966 pr_notice(" B0 : %08lx L0 : %08lx M0 : %08lx I0 : %08lx\n",
967 fp->b0, fp->l0, fp->m0, fp->i0);
968 pr_notice(" B1 : %08lx L1 : %08lx M1 : %08lx I1 : %08lx\n",
969 fp->b1, fp->l1, fp->m1, fp->i1);
970 pr_notice(" B2 : %08lx L2 : %08lx M2 : %08lx I2 : %08lx\n",
971 fp->b2, fp->l2, fp->m2, fp->i2);
972 pr_notice(" B3 : %08lx L3 : %08lx M3 : %08lx I3 : %08lx\n",
973 fp->b3, fp->l3, fp->m3, fp->i3);
974 pr_notice("A0.w: %08lx A0.x: %08lx A1.w: %08lx A1.x: %08lx\n",
975 fp->a0w, fp->a0x, fp->a1w, fp->a1x);
976
977 pr_notice("USP : %08lx ASTAT: %08lx\n",
978 rdusp(), fp->astat);
979
980 pr_notice("\n");
981}
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index ba70c4bc2699..59c1df75e4de 100644
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -1,25 +1,22 @@
1/* 1/*
2 * Copyright 2004-2009 Analog Devices Inc. 2 * Main exception handling logic.
3 *
4 * Copyright 2004-2010 Analog Devices Inc.
3 * 5 *
4 * Licensed under the GPL-2 or later 6 * Licensed under the GPL-2 or later
5 */ 7 */
6 8
7#include <linux/bug.h> 9#include <linux/bug.h>
8#include <linux/uaccess.h> 10#include <linux/uaccess.h>
9#include <linux/interrupt.h>
10#include <linux/module.h> 11#include <linux/module.h>
11#include <linux/kallsyms.h>
12#include <linux/fs.h>
13#include <linux/rbtree.h>
14#include <asm/traps.h> 12#include <asm/traps.h>
15#include <asm/cacheflush.h>
16#include <asm/cplb.h> 13#include <asm/cplb.h>
17#include <asm/dma.h>
18#include <asm/blackfin.h> 14#include <asm/blackfin.h>
19#include <asm/irq_handler.h> 15#include <asm/irq_handler.h>
20#include <linux/irq.h> 16#include <linux/irq.h>
21#include <asm/trace.h> 17#include <asm/trace.h>
22#include <asm/fixed_code.h> 18#include <asm/fixed_code.h>
19#include <asm/pseudo_instructions.h>
23 20
24#ifdef CONFIG_KGDB 21#ifdef CONFIG_KGDB
25# include <linux/kgdb.h> 22# include <linux/kgdb.h>
@@ -62,194 +59,6 @@ void __init trap_init(void)
62 CSYNC(); 59 CSYNC();
63} 60}
64 61
65static void decode_address(char *buf, unsigned long address)
66{
67#ifdef CONFIG_DEBUG_VERBOSE
68 struct task_struct *p;
69 struct mm_struct *mm;
70 unsigned long flags, offset;
71 unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic();
72 struct rb_node *n;
73
74#ifdef CONFIG_KALLSYMS
75 unsigned long symsize;
76 const char *symname;
77 char *modname;
78 char *delim = ":";
79 char namebuf[128];
80#endif
81
82 buf += sprintf(buf, "<0x%08lx> ", address);
83
84#ifdef CONFIG_KALLSYMS
85 /* look up the address and see if we are in kernel space */
86 symname = kallsyms_lookup(address, &symsize, &offset, &modname, namebuf);
87
88 if (symname) {
89 /* yeah! kernel space! */
90 if (!modname)
91 modname = delim = "";
92 sprintf(buf, "{ %s%s%s%s + 0x%lx }",
93 delim, modname, delim, symname,
94 (unsigned long)offset);
95 return;
96 }
97#endif
98
99 if (address >= FIXED_CODE_START && address < FIXED_CODE_END) {
100 /* Problem in fixed code section? */
101 strcat(buf, "/* Maybe fixed code section */");
102 return;
103
104 } else if (address < CONFIG_BOOT_LOAD) {
105 /* Problem somewhere before the kernel start address */
106 strcat(buf, "/* Maybe null pointer? */");
107 return;
108
109 } else if (address >= COREMMR_BASE) {
110 strcat(buf, "/* core mmrs */");
111 return;
112
113 } else if (address >= SYSMMR_BASE) {
114 strcat(buf, "/* system mmrs */");
115 return;
116
117 } else if (address >= L1_ROM_START && address < L1_ROM_START + L1_ROM_LENGTH) {
118 strcat(buf, "/* on-chip L1 ROM */");
119 return;
120 }
121
122 /*
123 * Don't walk any of the vmas if we are oopsing, it has been known
124 * to cause problems - corrupt vmas (kernel crashes) cause double faults
125 */
126 if (oops_in_progress) {
127 strcat(buf, "/* kernel dynamic memory (maybe user-space) */");
128 return;
129 }
130
131 /* looks like we're off in user-land, so let's walk all the
132 * mappings of all our processes and see if we can't be a whee
133 * bit more specific
134 */
135 write_lock_irqsave(&tasklist_lock, flags);
136 for_each_process(p) {
137 mm = (in_atomic ? p->mm : get_task_mm(p));
138 if (!mm)
139 continue;
140
141 if (!down_read_trylock(&mm->mmap_sem)) {
142 if (!in_atomic)
143 mmput(mm);
144 continue;
145 }
146
147 for (n = rb_first(&mm->mm_rb); n; n = rb_next(n)) {
148 struct vm_area_struct *vma;
149
150 vma = rb_entry(n, struct vm_area_struct, vm_rb);
151
152 if (address >= vma->vm_start && address < vma->vm_end) {
153 char _tmpbuf[256];
154 char *name = p->comm;
155 struct file *file = vma->vm_file;
156
157 if (file) {
158 char *d_name = d_path(&file->f_path, _tmpbuf,
159 sizeof(_tmpbuf));
160 if (!IS_ERR(d_name))
161 name = d_name;
162 }
163
164 /* FLAT does not have its text aligned to the start of
165 * the map while FDPIC ELF does ...
166 */
167
168 /* before we can check flat/fdpic, we need to
169 * make sure current is valid
170 */
171 if ((unsigned long)current >= FIXED_CODE_START &&
172 !((unsigned long)current & 0x3)) {
173 if (current->mm &&
174 (address > current->mm->start_code) &&
175 (address < current->mm->end_code))
176 offset = address - current->mm->start_code;
177 else
178 offset = (address - vma->vm_start) +
179 (vma->vm_pgoff << PAGE_SHIFT);
180
181 sprintf(buf, "[ %s + 0x%lx ]", name, offset);
182 } else
183 sprintf(buf, "[ %s vma:0x%lx-0x%lx]",
184 name, vma->vm_start, vma->vm_end);
185
186 up_read(&mm->mmap_sem);
187 if (!in_atomic)
188 mmput(mm);
189
190 if (buf[0] == '\0')
191 sprintf(buf, "[ %s ] dynamic memory", name);
192
193 goto done;
194 }
195 }
196
197 up_read(&mm->mmap_sem);
198 if (!in_atomic)
199 mmput(mm);
200 }
201
202 /*
203 * we were unable to find this address anywhere,
204 * or some MMs were skipped because they were in use.
205 */
206 sprintf(buf, "/* kernel dynamic memory */");
207
208done:
209 write_unlock_irqrestore(&tasklist_lock, flags);
210#else
211 sprintf(buf, " ");
212#endif
213}
214
215asmlinkage void double_fault_c(struct pt_regs *fp)
216{
217#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
218 int j;
219 trace_buffer_save(j);
220#endif
221
222 console_verbose();
223 oops_in_progress = 1;
224#ifdef CONFIG_DEBUG_VERBOSE
225 printk(KERN_EMERG "Double Fault\n");
226#ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT
227 if (((long)fp->seqstat & SEQSTAT_EXCAUSE) == VEC_UNCOV) {
228 unsigned int cpu = raw_smp_processor_id();
229 char buf[150];
230 decode_address(buf, cpu_pda[cpu].retx_doublefault);
231 printk(KERN_EMERG "While handling exception (EXCAUSE = 0x%x) at %s:\n",
232 (unsigned int)cpu_pda[cpu].seqstat_doublefault & SEQSTAT_EXCAUSE, buf);
233 decode_address(buf, cpu_pda[cpu].dcplb_doublefault_addr);
234 printk(KERN_NOTICE " DCPLB_FAULT_ADDR: %s\n", buf);
235 decode_address(buf, cpu_pda[cpu].icplb_doublefault_addr);
236 printk(KERN_NOTICE " ICPLB_FAULT_ADDR: %s\n", buf);
237
238 decode_address(buf, fp->retx);
239 printk(KERN_NOTICE "The instruction at %s caused a double exception\n", buf);
240 } else
241#endif
242 {
243 dump_bfin_process(fp);
244 dump_bfin_mem(fp);
245 show_regs(fp);
246 dump_bfin_trace_buffer();
247 }
248#endif
249 panic("Double Fault - unrecoverable event");
250
251}
252
253static int kernel_mode_regs(struct pt_regs *regs) 62static int kernel_mode_regs(struct pt_regs *regs)
254{ 63{
255 return regs->ipend & 0xffc0; 64 return regs->ipend & 0xffc0;
@@ -260,6 +69,9 @@ asmlinkage notrace void trap_c(struct pt_regs *fp)
260#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON 69#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
261 int j; 70 int j;
262#endif 71#endif
72#ifdef CONFIG_BFIN_PSEUDODBG_INSNS
73 int opcode;
74#endif
263 unsigned int cpu = raw_smp_processor_id(); 75 unsigned int cpu = raw_smp_processor_id();
264 const char *strerror = NULL; 76 const char *strerror = NULL;
265 int sig = 0; 77 int sig = 0;
@@ -392,6 +204,19 @@ asmlinkage notrace void trap_c(struct pt_regs *fp)
392 } 204 }
393 } 205 }
394#endif 206#endif
207#ifdef CONFIG_BFIN_PSEUDODBG_INSNS
208 /*
209 * Support for the fake instructions, if the instruction fails,
210 * then just execute a illegal opcode failure (like normal).
211 * Don't support these instructions inside the kernel
212 */
213 if (!kernel_mode_regs(fp) && get_instruction(&opcode, (unsigned short *)fp->pc)) {
214 if (execute_pseudodbg_assert(fp, opcode))
215 goto traps_done;
216 if (execute_pseudodbg(fp, opcode))
217 goto traps_done;
218 }
219#endif
395 info.si_code = ILL_ILLOPC; 220 info.si_code = ILL_ILLOPC;
396 sig = SIGILL; 221 sig = SIGILL;
397 strerror = KERN_NOTICE EXC_0x21(KERN_NOTICE); 222 strerror = KERN_NOTICE EXC_0x21(KERN_NOTICE);
@@ -672,659 +497,44 @@ asmlinkage notrace void trap_c(struct pt_regs *fp)
672 trace_buffer_restore(j); 497 trace_buffer_restore(j);
673} 498}
674 499
675/* Typical exception handling routines */ 500asmlinkage void double_fault_c(struct pt_regs *fp)
676
677#define EXPAND_LEN ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN) * 256 - 1)
678
679/*
680 * Similar to get_user, do some address checking, then dereference
681 * Return true on success, false on bad address
682 */
683static bool get_instruction(unsigned short *val, unsigned short *address)
684{
685 unsigned long addr = (unsigned long)address;
686
687 /* Check for odd addresses */
688 if (addr & 0x1)
689 return false;
690
691 /* MMR region will never have instructions */
692 if (addr >= SYSMMR_BASE)
693 return false;
694
695 switch (bfin_mem_access_type(addr, 2)) {
696 case BFIN_MEM_ACCESS_CORE:
697 case BFIN_MEM_ACCESS_CORE_ONLY:
698 *val = *address;
699 return true;
700 case BFIN_MEM_ACCESS_DMA:
701 dma_memcpy(val, address, 2);
702 return true;
703 case BFIN_MEM_ACCESS_ITEST:
704 isram_memcpy(val, address, 2);
705 return true;
706 default: /* invalid access */
707 return false;
708 }
709}
710
711/*
712 * decode the instruction if we are printing out the trace, as it
713 * makes things easier to follow, without running it through objdump
714 * These are the normal instructions which cause change of flow, which
715 * would be at the source of the trace buffer
716 */
717#if defined(CONFIG_DEBUG_VERBOSE) && defined(CONFIG_DEBUG_BFIN_HWTRACE_ON)
718static void decode_instruction(unsigned short *address)
719{
720 unsigned short opcode;
721
722 if (get_instruction(&opcode, address)) {
723 if (opcode == 0x0010)
724 verbose_printk("RTS");
725 else if (opcode == 0x0011)
726 verbose_printk("RTI");
727 else if (opcode == 0x0012)
728 verbose_printk("RTX");
729 else if (opcode == 0x0013)
730 verbose_printk("RTN");
731 else if (opcode == 0x0014)
732 verbose_printk("RTE");
733 else if (opcode == 0x0025)
734 verbose_printk("EMUEXCPT");
735 else if (opcode >= 0x0040 && opcode <= 0x0047)
736 verbose_printk("STI R%i", opcode & 7);
737 else if (opcode >= 0x0050 && opcode <= 0x0057)
738 verbose_printk("JUMP (P%i)", opcode & 7);
739 else if (opcode >= 0x0060 && opcode <= 0x0067)
740 verbose_printk("CALL (P%i)", opcode & 7);
741 else if (opcode >= 0x0070 && opcode <= 0x0077)
742 verbose_printk("CALL (PC+P%i)", opcode & 7);
743 else if (opcode >= 0x0080 && opcode <= 0x0087)
744 verbose_printk("JUMP (PC+P%i)", opcode & 7);
745 else if (opcode >= 0x0090 && opcode <= 0x009F)
746 verbose_printk("RAISE 0x%x", opcode & 0xF);
747 else if (opcode >= 0x00A0 && opcode <= 0x00AF)
748 verbose_printk("EXCPT 0x%x", opcode & 0xF);
749 else if ((opcode >= 0x1000 && opcode <= 0x13FF) || (opcode >= 0x1800 && opcode <= 0x1BFF))
750 verbose_printk("IF !CC JUMP");
751 else if ((opcode >= 0x1400 && opcode <= 0x17ff) || (opcode >= 0x1c00 && opcode <= 0x1fff))
752 verbose_printk("IF CC JUMP");
753 else if (opcode >= 0x2000 && opcode <= 0x2fff)
754 verbose_printk("JUMP.S");
755 else if (opcode >= 0xe080 && opcode <= 0xe0ff)
756 verbose_printk("LSETUP");
757 else if (opcode >= 0xe200 && opcode <= 0xe2ff)
758 verbose_printk("JUMP.L");
759 else if (opcode >= 0xe300 && opcode <= 0xe3ff)
760 verbose_printk("CALL pcrel");
761 else
762 verbose_printk("0x%04x", opcode);
763 }
764
765}
766#endif
767
768void dump_bfin_trace_buffer(void)
769{
770#ifdef CONFIG_DEBUG_VERBOSE
771#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
772 int tflags, i = 0;
773 char buf[150];
774 unsigned short *addr;
775#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
776 int j, index;
777#endif
778
779 trace_buffer_save(tflags);
780
781 printk(KERN_NOTICE "Hardware Trace:\n");
782
783#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
784 printk(KERN_NOTICE "WARNING: Expanded trace turned on - can not trace exceptions\n");
785#endif
786
787 if (likely(bfin_read_TBUFSTAT() & TBUFCNT)) {
788 for (; bfin_read_TBUFSTAT() & TBUFCNT; i++) {
789 decode_address(buf, (unsigned long)bfin_read_TBUF());
790 printk(KERN_NOTICE "%4i Target : %s\n", i, buf);
791 addr = (unsigned short *)bfin_read_TBUF();
792 decode_address(buf, (unsigned long)addr);
793 printk(KERN_NOTICE " Source : %s ", buf);
794 decode_instruction(addr);
795 printk("\n");
796 }
797 }
798
799#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
800 if (trace_buff_offset)
801 index = trace_buff_offset / 4;
802 else
803 index = EXPAND_LEN;
804
805 j = (1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN) * 128;
806 while (j) {
807 decode_address(buf, software_trace_buff[index]);
808 printk(KERN_NOTICE "%4i Target : %s\n", i, buf);
809 index -= 1;
810 if (index < 0 )
811 index = EXPAND_LEN;
812 decode_address(buf, software_trace_buff[index]);
813 printk(KERN_NOTICE " Source : %s ", buf);
814 decode_instruction((unsigned short *)software_trace_buff[index]);
815 printk("\n");
816 index -= 1;
817 if (index < 0)
818 index = EXPAND_LEN;
819 j--;
820 i++;
821 }
822#endif
823
824 trace_buffer_restore(tflags);
825#endif
826#endif
827}
828EXPORT_SYMBOL(dump_bfin_trace_buffer);
829
830#ifdef CONFIG_BUG
831int is_valid_bugaddr(unsigned long addr)
832{
833 unsigned short opcode;
834
835 if (!get_instruction(&opcode, (unsigned short *)addr))
836 return 0;
837
838 return opcode == BFIN_BUG_OPCODE;
839}
840#endif
841
842/*
843 * Checks to see if the address pointed to is either a
844 * 16-bit CALL instruction, or a 32-bit CALL instruction
845 */
846static bool is_bfin_call(unsigned short *addr)
847{
848 unsigned short opcode = 0, *ins_addr;
849 ins_addr = (unsigned short *)addr;
850
851 if (!get_instruction(&opcode, ins_addr))
852 return false;
853
854 if ((opcode >= 0x0060 && opcode <= 0x0067) ||
855 (opcode >= 0x0070 && opcode <= 0x0077))
856 return true;
857
858 ins_addr--;
859 if (!get_instruction(&opcode, ins_addr))
860 return false;
861
862 if (opcode >= 0xE300 && opcode <= 0xE3FF)
863 return true;
864
865 return false;
866
867}
868
869void show_stack(struct task_struct *task, unsigned long *stack)
870{
871#ifdef CONFIG_PRINTK
872 unsigned int *addr, *endstack, *fp = 0, *frame;
873 unsigned short *ins_addr;
874 char buf[150];
875 unsigned int i, j, ret_addr, frame_no = 0;
876
877 /*
878 * If we have been passed a specific stack, use that one otherwise
879 * if we have been passed a task structure, use that, otherwise
880 * use the stack of where the variable "stack" exists
881 */
882
883 if (stack == NULL) {
884 if (task) {
885 /* We know this is a kernel stack, so this is the start/end */
886 stack = (unsigned long *)task->thread.ksp;
887 endstack = (unsigned int *)(((unsigned int)(stack) & ~(THREAD_SIZE - 1)) + THREAD_SIZE);
888 } else {
889 /* print out the existing stack info */
890 stack = (unsigned long *)&stack;
891 endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack);
892 }
893 } else
894 endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack);
895
896 printk(KERN_NOTICE "Stack info:\n");
897 decode_address(buf, (unsigned int)stack);
898 printk(KERN_NOTICE " SP: [0x%p] %s\n", stack, buf);
899
900 if (!access_ok(VERIFY_READ, stack, (unsigned int)endstack - (unsigned int)stack)) {
901 printk(KERN_NOTICE "Invalid stack pointer\n");
902 return;
903 }
904
905 /* First thing is to look for a frame pointer */
906 for (addr = (unsigned int *)((unsigned int)stack & ~0xF); addr < endstack; addr++) {
907 if (*addr & 0x1)
908 continue;
909 ins_addr = (unsigned short *)*addr;
910 ins_addr--;
911 if (is_bfin_call(ins_addr))
912 fp = addr - 1;
913
914 if (fp) {
915 /* Let's check to see if it is a frame pointer */
916 while (fp >= (addr - 1) && fp < endstack
917 && fp && ((unsigned int) fp & 0x3) == 0)
918 fp = (unsigned int *)*fp;
919 if (fp == 0 || fp == endstack) {
920 fp = addr - 1;
921 break;
922 }
923 fp = 0;
924 }
925 }
926 if (fp) {
927 frame = fp;
928 printk(KERN_NOTICE " FP: (0x%p)\n", fp);
929 } else
930 frame = 0;
931
932 /*
933 * Now that we think we know where things are, we
934 * walk the stack again, this time printing things out
935 * incase there is no frame pointer, we still look for
936 * valid return addresses
937 */
938
939 /* First time print out data, next time, print out symbols */
940 for (j = 0; j <= 1; j++) {
941 if (j)
942 printk(KERN_NOTICE "Return addresses in stack:\n");
943 else
944 printk(KERN_NOTICE " Memory from 0x%08lx to %p", ((long unsigned int)stack & ~0xF), endstack);
945
946 fp = frame;
947 frame_no = 0;
948
949 for (addr = (unsigned int *)((unsigned int)stack & ~0xF), i = 0;
950 addr < endstack; addr++, i++) {
951
952 ret_addr = 0;
953 if (!j && i % 8 == 0)
954 printk(KERN_NOTICE "%p:",addr);
955
956 /* if it is an odd address, or zero, just skip it */
957 if (*addr & 0x1 || !*addr)
958 goto print;
959
960 ins_addr = (unsigned short *)*addr;
961
962 /* Go back one instruction, and see if it is a CALL */
963 ins_addr--;
964 ret_addr = is_bfin_call(ins_addr);
965 print:
966 if (!j && stack == (unsigned long *)addr)
967 printk("[%08x]", *addr);
968 else if (ret_addr)
969 if (j) {
970 decode_address(buf, (unsigned int)*addr);
971 if (frame == addr) {
972 printk(KERN_NOTICE " frame %2i : %s\n", frame_no, buf);
973 continue;
974 }
975 printk(KERN_NOTICE " address : %s\n", buf);
976 } else
977 printk("<%08x>", *addr);
978 else if (fp == addr) {
979 if (j)
980 frame = addr+1;
981 else
982 printk("(%08x)", *addr);
983
984 fp = (unsigned int *)*addr;
985 frame_no++;
986
987 } else if (!j)
988 printk(" %08x ", *addr);
989 }
990 if (!j)
991 printk("\n");
992 }
993#endif
994}
995EXPORT_SYMBOL(show_stack);
996
997void dump_stack(void)
998{ 501{
999 unsigned long stack;
1000#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON 502#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
1001 int tflags; 503 int j;
504 trace_buffer_save(j);
1002#endif 505#endif
1003 trace_buffer_save(tflags);
1004 dump_bfin_trace_buffer();
1005 show_stack(current, &stack);
1006 trace_buffer_restore(tflags);
1007}
1008EXPORT_SYMBOL(dump_stack);
1009 506
1010void dump_bfin_process(struct pt_regs *fp) 507 console_verbose();
1011{ 508 oops_in_progress = 1;
1012#ifdef CONFIG_DEBUG_VERBOSE 509#ifdef CONFIG_DEBUG_VERBOSE
1013 /* We should be able to look at fp->ipend, but we don't push it on the 510 printk(KERN_EMERG "Double Fault\n");
1014 * stack all the time, so do this until we fix that */ 511#ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT
1015 unsigned int context = bfin_read_IPEND(); 512 if (((long)fp->seqstat & SEQSTAT_EXCAUSE) == VEC_UNCOV) {
1016 513 unsigned int cpu = raw_smp_processor_id();
1017 if (oops_in_progress) 514 char buf[150];
1018 verbose_printk(KERN_EMERG "Kernel OOPS in progress\n"); 515 decode_address(buf, cpu_pda[cpu].retx_doublefault);
1019 516 printk(KERN_EMERG "While handling exception (EXCAUSE = 0x%x) at %s:\n",
1020 if (context & 0x0020 && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR) 517 (unsigned int)cpu_pda[cpu].seqstat_doublefault & SEQSTAT_EXCAUSE, buf);
1021 verbose_printk(KERN_NOTICE "HW Error context\n"); 518 decode_address(buf, cpu_pda[cpu].dcplb_doublefault_addr);
1022 else if (context & 0x0020) 519 printk(KERN_NOTICE " DCPLB_FAULT_ADDR: %s\n", buf);
1023 verbose_printk(KERN_NOTICE "Deferred Exception context\n"); 520 decode_address(buf, cpu_pda[cpu].icplb_doublefault_addr);
1024 else if (context & 0x3FC0) 521 printk(KERN_NOTICE " ICPLB_FAULT_ADDR: %s\n", buf);
1025 verbose_printk(KERN_NOTICE "Interrupt context\n");
1026 else if (context & 0x4000)
1027 verbose_printk(KERN_NOTICE "Deferred Interrupt context\n");
1028 else if (context & 0x8000)
1029 verbose_printk(KERN_NOTICE "Kernel process context\n");
1030
1031 /* Because we are crashing, and pointers could be bad, we check things
1032 * pretty closely before we use them
1033 */
1034 if ((unsigned long)current >= FIXED_CODE_START &&
1035 !((unsigned long)current & 0x3) && current->pid) {
1036 verbose_printk(KERN_NOTICE "CURRENT PROCESS:\n");
1037 if (current->comm >= (char *)FIXED_CODE_START)
1038 verbose_printk(KERN_NOTICE "COMM=%s PID=%d",
1039 current->comm, current->pid);
1040 else
1041 verbose_printk(KERN_NOTICE "COMM= invalid");
1042 522
1043 printk(KERN_CONT " CPU=%d\n", current_thread_info()->cpu); 523 decode_address(buf, fp->retx);
1044 if (!((unsigned long)current->mm & 0x3) && (unsigned long)current->mm >= FIXED_CODE_START) 524 printk(KERN_NOTICE "The instruction at %s caused a double exception\n", buf);
1045 verbose_printk(KERN_NOTICE
1046 "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n"
1047 " BSS = 0x%p-0x%p USER-STACK = 0x%p\n\n",
1048 (void *)current->mm->start_code,
1049 (void *)current->mm->end_code,
1050 (void *)current->mm->start_data,
1051 (void *)current->mm->end_data,
1052 (void *)current->mm->end_data,
1053 (void *)current->mm->brk,
1054 (void *)current->mm->start_stack);
1055 else
1056 verbose_printk(KERN_NOTICE "invalid mm\n");
1057 } else 525 } else
1058 verbose_printk(KERN_NOTICE
1059 "No Valid process in current context\n");
1060#endif
1061}
1062
1063void dump_bfin_mem(struct pt_regs *fp)
1064{
1065#ifdef CONFIG_DEBUG_VERBOSE
1066 unsigned short *addr, *erraddr, val = 0, err = 0;
1067 char sti = 0, buf[6];
1068
1069 erraddr = (void *)fp->pc;
1070
1071 verbose_printk(KERN_NOTICE "return address: [0x%p]; contents of:", erraddr);
1072
1073 for (addr = (unsigned short *)((unsigned long)erraddr & ~0xF) - 0x10;
1074 addr < (unsigned short *)((unsigned long)erraddr & ~0xF) + 0x10;
1075 addr++) {
1076 if (!((unsigned long)addr & 0xF))
1077 verbose_printk(KERN_NOTICE "0x%p: ", addr);
1078
1079 if (!get_instruction(&val, addr)) {
1080 val = 0;
1081 sprintf(buf, "????");
1082 } else
1083 sprintf(buf, "%04x", val);
1084
1085 if (addr == erraddr) {
1086 verbose_printk("[%s]", buf);
1087 err = val;
1088 } else
1089 verbose_printk(" %s ", buf);
1090
1091 /* Do any previous instructions turn on interrupts? */
1092 if (addr <= erraddr && /* in the past */
1093 ((val >= 0x0040 && val <= 0x0047) || /* STI instruction */
1094 val == 0x017b)) /* [SP++] = RETI */
1095 sti = 1;
1096 }
1097
1098 verbose_printk("\n");
1099
1100 /* Hardware error interrupts can be deferred */
1101 if (unlikely(sti && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR &&
1102 oops_in_progress)){
1103 verbose_printk(KERN_NOTICE "Looks like this was a deferred error - sorry\n");
1104#ifndef CONFIG_DEBUG_HWERR
1105 verbose_printk(KERN_NOTICE
1106"The remaining message may be meaningless\n"
1107"You should enable CONFIG_DEBUG_HWERR to get a better idea where it came from\n");
1108#else
1109 /* If we are handling only one peripheral interrupt
1110 * and current mm and pid are valid, and the last error
1111 * was in that user space process's text area
1112 * print it out - because that is where the problem exists
1113 */
1114 if ((!(((fp)->ipend & ~0x30) & (((fp)->ipend & ~0x30) - 1))) &&
1115 (current->pid && current->mm)) {
1116 /* And the last RETI points to the current userspace context */
1117 if ((fp + 1)->pc >= current->mm->start_code &&
1118 (fp + 1)->pc <= current->mm->end_code) {
1119 verbose_printk(KERN_NOTICE "It might be better to look around here :\n");
1120 verbose_printk(KERN_NOTICE "-------------------------------------------\n");
1121 show_regs(fp + 1);
1122 verbose_printk(KERN_NOTICE "-------------------------------------------\n");
1123 }
1124 }
1125#endif
1126 }
1127#endif
1128}
1129
1130void show_regs(struct pt_regs *fp)
1131{
1132#ifdef CONFIG_DEBUG_VERBOSE
1133 char buf [150];
1134 struct irqaction *action;
1135 unsigned int i;
1136 unsigned long flags = 0;
1137 unsigned int cpu = raw_smp_processor_id();
1138 unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic();
1139
1140 verbose_printk(KERN_NOTICE "\n");
1141 if (CPUID != bfin_cpuid())
1142 verbose_printk(KERN_NOTICE "Compiled for cpu family 0x%04x (Rev %d), "
1143 "but running on:0x%04x (Rev %d)\n",
1144 CPUID, bfin_compiled_revid(), bfin_cpuid(), bfin_revid());
1145
1146 verbose_printk(KERN_NOTICE "ADSP-%s-0.%d",
1147 CPU, bfin_compiled_revid());
1148
1149 if (bfin_compiled_revid() != bfin_revid())
1150 verbose_printk("(Detected 0.%d)", bfin_revid());
1151
1152 verbose_printk(" %lu(MHz CCLK) %lu(MHz SCLK) (%s)\n",
1153 get_cclk()/1000000, get_sclk()/1000000,
1154#ifdef CONFIG_MPU
1155 "mpu on"
1156#else
1157 "mpu off"
1158#endif
1159 );
1160
1161 verbose_printk(KERN_NOTICE "%s", linux_banner);
1162
1163 verbose_printk(KERN_NOTICE "\nSEQUENCER STATUS:\t\t%s\n", print_tainted());
1164 verbose_printk(KERN_NOTICE " SEQSTAT: %08lx IPEND: %04lx IMASK: %04lx SYSCFG: %04lx\n",
1165 (long)fp->seqstat, fp->ipend, cpu_pda[raw_smp_processor_id()].ex_imask, fp->syscfg);
1166 if (fp->ipend & EVT_IRPTEN)
1167 verbose_printk(KERN_NOTICE " Global Interrupts Disabled (IPEND[4])\n");
1168 if (!(cpu_pda[raw_smp_processor_id()].ex_imask & (EVT_IVG13 | EVT_IVG12 | EVT_IVG11 |
1169 EVT_IVG10 | EVT_IVG9 | EVT_IVG8 | EVT_IVG7 | EVT_IVTMR)))
1170 verbose_printk(KERN_NOTICE " Peripheral interrupts masked off\n");
1171 if (!(cpu_pda[raw_smp_processor_id()].ex_imask & (EVT_IVG15 | EVT_IVG14)))
1172 verbose_printk(KERN_NOTICE " Kernel interrupts masked off\n");
1173 if ((fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR) {
1174 verbose_printk(KERN_NOTICE " HWERRCAUSE: 0x%lx\n",
1175 (fp->seqstat & SEQSTAT_HWERRCAUSE) >> 14);
1176#ifdef EBIU_ERRMST
1177 /* If the error was from the EBIU, print it out */
1178 if (bfin_read_EBIU_ERRMST() & CORE_ERROR) {
1179 verbose_printk(KERN_NOTICE " EBIU Error Reason : 0x%04x\n",
1180 bfin_read_EBIU_ERRMST());
1181 verbose_printk(KERN_NOTICE " EBIU Error Address : 0x%08x\n",
1182 bfin_read_EBIU_ERRADD());
1183 }
1184#endif 526#endif
527 {
528 dump_bfin_process(fp);
529 dump_bfin_mem(fp);
530 show_regs(fp);
531 dump_bfin_trace_buffer();
1185 } 532 }
1186 verbose_printk(KERN_NOTICE " EXCAUSE : 0x%lx\n",
1187 fp->seqstat & SEQSTAT_EXCAUSE);
1188 for (i = 2; i <= 15 ; i++) {
1189 if (fp->ipend & (1 << i)) {
1190 if (i != 4) {
1191 decode_address(buf, bfin_read32(EVT0 + 4*i));
1192 verbose_printk(KERN_NOTICE " physical IVG%i asserted : %s\n", i, buf);
1193 } else
1194 verbose_printk(KERN_NOTICE " interrupts disabled\n");
1195 }
1196 }
1197
1198 /* if no interrupts are going off, don't print this out */
1199 if (fp->ipend & ~0x3F) {
1200 for (i = 0; i < (NR_IRQS - 1); i++) {
1201 if (!in_atomic)
1202 raw_spin_lock_irqsave(&irq_desc[i].lock, flags);
1203
1204 action = irq_desc[i].action;
1205 if (!action)
1206 goto unlock;
1207
1208 decode_address(buf, (unsigned int)action->handler);
1209 verbose_printk(KERN_NOTICE " logical irq %3d mapped : %s", i, buf);
1210 for (action = action->next; action; action = action->next) {
1211 decode_address(buf, (unsigned int)action->handler);
1212 verbose_printk(", %s", buf);
1213 }
1214 verbose_printk("\n");
1215unlock:
1216 if (!in_atomic)
1217 raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags);
1218 }
1219 }
1220
1221 decode_address(buf, fp->rete);
1222 verbose_printk(KERN_NOTICE " RETE: %s\n", buf);
1223 decode_address(buf, fp->retn);
1224 verbose_printk(KERN_NOTICE " RETN: %s\n", buf);
1225 decode_address(buf, fp->retx);
1226 verbose_printk(KERN_NOTICE " RETX: %s\n", buf);
1227 decode_address(buf, fp->rets);
1228 verbose_printk(KERN_NOTICE " RETS: %s\n", buf);
1229 decode_address(buf, fp->pc);
1230 verbose_printk(KERN_NOTICE " PC : %s\n", buf);
1231
1232 if (((long)fp->seqstat & SEQSTAT_EXCAUSE) &&
1233 (((long)fp->seqstat & SEQSTAT_EXCAUSE) != VEC_HWERR)) {
1234 decode_address(buf, cpu_pda[cpu].dcplb_fault_addr);
1235 verbose_printk(KERN_NOTICE "DCPLB_FAULT_ADDR: %s\n", buf);
1236 decode_address(buf, cpu_pda[cpu].icplb_fault_addr);
1237 verbose_printk(KERN_NOTICE "ICPLB_FAULT_ADDR: %s\n", buf);
1238 }
1239
1240 verbose_printk(KERN_NOTICE "PROCESSOR STATE:\n");
1241 verbose_printk(KERN_NOTICE " R0 : %08lx R1 : %08lx R2 : %08lx R3 : %08lx\n",
1242 fp->r0, fp->r1, fp->r2, fp->r3);
1243 verbose_printk(KERN_NOTICE " R4 : %08lx R5 : %08lx R6 : %08lx R7 : %08lx\n",
1244 fp->r4, fp->r5, fp->r6, fp->r7);
1245 verbose_printk(KERN_NOTICE " P0 : %08lx P1 : %08lx P2 : %08lx P3 : %08lx\n",
1246 fp->p0, fp->p1, fp->p2, fp->p3);
1247 verbose_printk(KERN_NOTICE " P4 : %08lx P5 : %08lx FP : %08lx SP : %08lx\n",
1248 fp->p4, fp->p5, fp->fp, (long)fp);
1249 verbose_printk(KERN_NOTICE " LB0: %08lx LT0: %08lx LC0: %08lx\n",
1250 fp->lb0, fp->lt0, fp->lc0);
1251 verbose_printk(KERN_NOTICE " LB1: %08lx LT1: %08lx LC1: %08lx\n",
1252 fp->lb1, fp->lt1, fp->lc1);
1253 verbose_printk(KERN_NOTICE " B0 : %08lx L0 : %08lx M0 : %08lx I0 : %08lx\n",
1254 fp->b0, fp->l0, fp->m0, fp->i0);
1255 verbose_printk(KERN_NOTICE " B1 : %08lx L1 : %08lx M1 : %08lx I1 : %08lx\n",
1256 fp->b1, fp->l1, fp->m1, fp->i1);
1257 verbose_printk(KERN_NOTICE " B2 : %08lx L2 : %08lx M2 : %08lx I2 : %08lx\n",
1258 fp->b2, fp->l2, fp->m2, fp->i2);
1259 verbose_printk(KERN_NOTICE " B3 : %08lx L3 : %08lx M3 : %08lx I3 : %08lx\n",
1260 fp->b3, fp->l3, fp->m3, fp->i3);
1261 verbose_printk(KERN_NOTICE "A0.w: %08lx A0.x: %08lx A1.w: %08lx A1.x: %08lx\n",
1262 fp->a0w, fp->a0x, fp->a1w, fp->a1x);
1263
1264 verbose_printk(KERN_NOTICE "USP : %08lx ASTAT: %08lx\n",
1265 rdusp(), fp->astat);
1266
1267 verbose_printk(KERN_NOTICE "\n");
1268#endif 533#endif
1269} 534 panic("Double Fault - unrecoverable event");
1270
1271#ifdef CONFIG_SYS_BFIN_SPINLOCK_L1
1272asmlinkage int sys_bfin_spinlock(int *spinlock)__attribute__((l1_text));
1273#endif
1274
1275static DEFINE_SPINLOCK(bfin_spinlock_lock);
1276
1277asmlinkage int sys_bfin_spinlock(int *p)
1278{
1279 int ret, tmp = 0;
1280
1281 spin_lock(&bfin_spinlock_lock); /* This would also hold kernel preemption. */
1282 ret = get_user(tmp, p);
1283 if (likely(ret == 0)) {
1284 if (unlikely(tmp))
1285 ret = 1;
1286 else
1287 put_user(1, p);
1288 }
1289 spin_unlock(&bfin_spinlock_lock);
1290 return ret;
1291}
1292
1293int bfin_request_exception(unsigned int exception, void (*handler)(void))
1294{
1295 void (*curr_handler)(void);
1296
1297 if (exception > 0x3F)
1298 return -EINVAL;
1299
1300 curr_handler = ex_table[exception];
1301
1302 if (curr_handler != ex_replaceable)
1303 return -EBUSY;
1304
1305 ex_table[exception] = handler;
1306 535
1307 return 0;
1308} 536}
1309EXPORT_SYMBOL(bfin_request_exception);
1310
1311int bfin_free_exception(unsigned int exception, void (*handler)(void))
1312{
1313 void (*curr_handler)(void);
1314
1315 if (exception > 0x3F)
1316 return -EINVAL;
1317
1318 curr_handler = ex_table[exception];
1319 537
1320 if (curr_handler != handler)
1321 return -EBUSY;
1322
1323 ex_table[exception] = ex_replaceable;
1324
1325 return 0;
1326}
1327EXPORT_SYMBOL(bfin_free_exception);
1328 538
1329void panic_cplb_error(int cplb_panic, struct pt_regs *fp) 539void panic_cplb_error(int cplb_panic, struct pt_regs *fp)
1330{ 540{
@@ -1349,3 +559,23 @@ void panic_cplb_error(int cplb_panic, struct pt_regs *fp)
1349 dump_stack(); 559 dump_stack();
1350 panic("Unrecoverable event"); 560 panic("Unrecoverable event");
1351} 561}
562
563#ifdef CONFIG_BUG
564int is_valid_bugaddr(unsigned long addr)
565{
566 unsigned int opcode;
567
568 if (!get_instruction(&opcode, (unsigned short *)addr))
569 return 0;
570
571 return opcode == BFIN_BUG_OPCODE;
572}
573#endif
574
575/* stub this out */
576#ifndef CONFIG_DEBUG_VERBOSE
577void show_regs(struct pt_regs *fp)
578{
579
580}
581#endif
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-05 00:26:47 -0500