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-rw-r--r--arch/blackfin/kernel/traps.c649
1 files changed, 649 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
new file mode 100644
index 000000000000..9556b73de808
--- /dev/null
+++ b/arch/blackfin/kernel/traps.c
@@ -0,0 +1,649 @@
+/*
+ * File: arch/blackfin/kernel/traps.c
+ * Based on:
+ * Author: Hamish Macdonald
+ *
+ * Created:
+ * Description: uses S/W interrupt 15 for the system calls
+ *
+ * Modified:
+ * Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs: Enter bugs at http://blackfin.uclinux.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <asm/uaccess.h>
+#include <asm/traps.h>
+#include <asm/cacheflush.h>
+#include <asm/blackfin.h>
+#include <asm/uaccess.h>
+#include <asm/irq_handler.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/kallsyms.h>
+
+#ifdef CONFIG_KGDB
+# include <linux/debugger.h>
+# include <linux/kgdb.h>
+#endif
+
+/* Initiate the event table handler */
+void __init trap_init(void)
+{
+ CSYNC();
+ bfin_write_EVT3(trap);
+ CSYNC();
+}
+
+asmlinkage void trap_c(struct pt_regs *fp);
+
+int kstack_depth_to_print = 48;
+
+static int printk_address(unsigned long address)
+{
+ struct vm_list_struct *vml;
+ struct task_struct *p;
+ struct mm_struct *mm;
+
+#ifdef CONFIG_KALLSYMS
+ unsigned long offset = 0, symsize;
+ const char *symname;
+ char *modname;
+ char *delim = ":";
+ char namebuf[128];
+
+ /* 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 = "";
+ return printk("<0x%p> { %s%s%s%s + 0x%lx }",
+ (void*)address, delim, modname, delim, symname,
+ (unsigned long)offset);
+
+ }
+#endif
+
+ /* 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_irq(&tasklist_lock);
+ for_each_process(p) {
+ mm = get_task_mm(p);
+ if (!mm)
+ continue;
+
+ vml = mm->context.vmlist;
+ while (vml) {
+ struct vm_area_struct *vma = vml->vma;
+
+ if (address >= vma->vm_start && address < vma->vm_end) {
+ char *name = p->comm;
+ struct file *file = vma->vm_file;
+ if (file) {
+ char _tmpbuf[256];
+ name = d_path(file->f_dentry,
+ file->f_vfsmnt,
+ _tmpbuf,
+ sizeof(_tmpbuf));
+ }
+
+ write_unlock_irq(&tasklist_lock);
+ return printk("<0x%p> [ %s + 0x%lx ]",
+ (void*)address, name,
+ (unsigned long)
+ ((address - vma->vm_start) +
+ (vma->vm_pgoff << PAGE_SHIFT)));
+ }
+
+ vml = vml->next;
+ }
+ }
+ write_unlock_irq(&tasklist_lock);
+
+ /* we were unable to find this address anywhere */
+ return printk("[<0x%p>]", (void*)address);
+}
+
+#define trace_buffer_save(x) \
+ do { \
+ (x) = bfin_read_TBUFCTL(); \
+ bfin_write_TBUFCTL((x) & ~TBUFEN); \
+ } while (0)
+#define trace_buffer_restore(x) \
+ do { \
+ bfin_write_TBUFCTL((x)); \
+ } while (0)
+
+asmlinkage void trap_c(struct pt_regs *fp)
+{
+ int j, sig = 0;
+ siginfo_t info;
+ unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE;
+
+#ifdef CONFIG_KGDB
+# define CHK_DEBUGGER_TRAP() do { CHK_DEBUGGER(trapnr, sig, info.si_code, fp,); } while (0)
+# define CHK_DEBUGGER_TRAP_MAYBE() do { if (kgdb_connected) CHK_DEBUGGER_TRAP(); } while (0)
+#else
+# define CHK_DEBUGGER_TRAP() do { } while (0)
+# define CHK_DEBUGGER_TRAP_MAYBE() do { } while (0)
+#endif
+
+ trace_buffer_save(j);
+
+ /* trap_c() will be called for exceptions. During exceptions
+ * processing, the pc value should be set with retx value.
+ * With this change we can cleanup some code in signal.c- TODO
+ */
+ fp->orig_pc = fp->retx;
+ /* printk("exception: 0x%x, ipend=%x, reti=%x, retx=%x\n",
+ trapnr, fp->ipend, fp->pc, fp->retx); */
+
+ /* send the appropriate signal to the user program */
+ switch (trapnr) {
+
+ /* This table works in conjuction with the one in ./mach-common/entry.S
+ * Some exceptions are handled there (in assembly, in exception space)
+ * Some are handled here, (in C, in interrupt space)
+ * Some, like CPLB, are handled in both, where the normal path is
+ * handled in assembly/exception space, and the error path is handled
+ * here
+ */
+
+ /* 0x00 - Linux Syscall, getting here is an error */
+ /* 0x01 - userspace gdb breakpoint, handled here */
+ case VEC_EXCPT01:
+ info.si_code = TRAP_ILLTRAP;
+ sig = SIGTRAP;
+ CHK_DEBUGGER_TRAP_MAYBE();
+ /* Check if this is a breakpoint in kernel space */
+ if (fp->ipend & 0xffc0)
+ return;
+ else
+ break;
+#ifdef CONFIG_KGDB
+ case VEC_EXCPT02 : /* gdb connection */
+ info.si_code = TRAP_ILLTRAP;
+ sig = SIGTRAP;
+ CHK_DEBUGGER_TRAP();
+ return;
+#else
+ /* 0x02 - User Defined, Caught by default */
+#endif
+ /* 0x03 - Atomic test and set */
+ case VEC_EXCPT03:
+ info.si_code = SEGV_STACKFLOW;
+ sig = SIGSEGV;
+ printk(KERN_EMERG EXC_0x03);
+ CHK_DEBUGGER_TRAP();
+ break;
+ /* 0x04 - spinlock - handled by _ex_spinlock,
+ getting here is an error */
+ /* 0x05 - User Defined, Caught by default */
+ /* 0x06 - User Defined, Caught by default */
+ /* 0x07 - User Defined, Caught by default */
+ /* 0x08 - User Defined, Caught by default */
+ /* 0x09 - User Defined, Caught by default */
+ /* 0x0A - User Defined, Caught by default */
+ /* 0x0B - User Defined, Caught by default */
+ /* 0x0C - User Defined, Caught by default */
+ /* 0x0D - User Defined, Caught by default */
+ /* 0x0E - User Defined, Caught by default */
+ /* 0x0F - User Defined, Caught by default */
+ /* 0x10 HW Single step, handled here */
+ case VEC_STEP:
+ info.si_code = TRAP_STEP;
+ sig = SIGTRAP;
+ CHK_DEBUGGER_TRAP_MAYBE();
+ /* Check if this is a single step in kernel space */
+ if (fp->ipend & 0xffc0)
+ return;
+ else
+ break;
+ /* 0x11 - Trace Buffer Full, handled here */
+ case VEC_OVFLOW:
+ info.si_code = TRAP_TRACEFLOW;
+ sig = SIGTRAP;
+ printk(KERN_EMERG EXC_0x11);
+ CHK_DEBUGGER_TRAP();
+ break;
+ /* 0x12 - Reserved, Caught by default */
+ /* 0x13 - Reserved, Caught by default */
+ /* 0x14 - Reserved, Caught by default */
+ /* 0x15 - Reserved, Caught by default */
+ /* 0x16 - Reserved, Caught by default */
+ /* 0x17 - Reserved, Caught by default */
+ /* 0x18 - Reserved, Caught by default */
+ /* 0x19 - Reserved, Caught by default */
+ /* 0x1A - Reserved, Caught by default */
+ /* 0x1B - Reserved, Caught by default */
+ /* 0x1C - Reserved, Caught by default */
+ /* 0x1D - Reserved, Caught by default */
+ /* 0x1E - Reserved, Caught by default */
+ /* 0x1F - Reserved, Caught by default */
+ /* 0x20 - Reserved, Caught by default */
+ /* 0x21 - Undefined Instruction, handled here */
+ case VEC_UNDEF_I:
+ info.si_code = ILL_ILLOPC;
+ sig = SIGILL;
+ printk(KERN_EMERG EXC_0x21);
+ CHK_DEBUGGER_TRAP();
+ break;
+ /* 0x22 - Illegal Instruction Combination, handled here */
+ case VEC_ILGAL_I:
+ info.si_code = ILL_ILLPARAOP;
+ sig = SIGILL;
+ printk(KERN_EMERG EXC_0x22);
+ CHK_DEBUGGER_TRAP();
+ break;
+ /* 0x23 - Data CPLB Protection Violation,
+ normal case is handled in _cplb_hdr */
+ case VEC_CPLB_VL:
+ info.si_code = ILL_CPLB_VI;
+ sig = SIGILL;
+ printk(KERN_EMERG EXC_0x23);
+ CHK_DEBUGGER_TRAP();
+ break;
+ /* 0x24 - Data access misaligned, handled here */
+ case VEC_MISALI_D:
+ info.si_code = BUS_ADRALN;
+ sig = SIGBUS;
+ printk(KERN_EMERG EXC_0x24);
+ CHK_DEBUGGER_TRAP();
+ break;
+ /* 0x25 - Unrecoverable Event, handled here */
+ case VEC_UNCOV:
+ info.si_code = ILL_ILLEXCPT;
+ sig = SIGILL;
+ printk(KERN_EMERG EXC_0x25);
+ CHK_DEBUGGER_TRAP();
+ break;
+ /* 0x26 - Data CPLB Miss, normal case is handled in _cplb_hdr,
+ error case is handled here */
+ case VEC_CPLB_M:
+ info.si_code = BUS_ADRALN;
+ sig = SIGBUS;
+ printk(KERN_EMERG EXC_0x26);
+ CHK_DEBUGGER_TRAP();
+ break;
+ /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero, handled here */
+ case VEC_CPLB_MHIT:
+ info.si_code = ILL_CPLB_MULHIT;
+#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
+ sig = SIGSEGV;
+ printk(KERN_EMERG "\n\nNULL pointer access (probably)\n");
+#else
+ sig = SIGILL;
+ printk(KERN_EMERG EXC_0x27);
+#endif
+ CHK_DEBUGGER_TRAP();
+ break;
+ /* 0x28 - Emulation Watchpoint, handled here */
+ case VEC_WATCH:
+ info.si_code = TRAP_WATCHPT;
+ sig = SIGTRAP;
+ pr_debug(EXC_0x28);
+ CHK_DEBUGGER_TRAP_MAYBE();
+ /* Check if this is a watchpoint in kernel space */
+ if (fp->ipend & 0xffc0)
+ return;
+ else
+ break;
+#ifdef CONFIG_BF535
+ /* 0x29 - Instruction fetch access error (535 only) */
+ case VEC_ISTRU_VL: /* ADSP-BF535 only (MH) */
+ info.si_code = BUS_OPFETCH;
+ sig = SIGBUS;
+ printk(KERN_EMERG "BF535: VEC_ISTRU_VL\n");
+ CHK_DEBUGGER_TRAP();
+ break;
+#else
+ /* 0x29 - Reserved, Caught by default */
+#endif
+ /* 0x2A - Instruction fetch misaligned, handled here */
+ case VEC_MISALI_I:
+ info.si_code = BUS_ADRALN;
+ sig = SIGBUS;
+ printk(KERN_EMERG EXC_0x2A);
+ CHK_DEBUGGER_TRAP();
+ break;
+ /* 0x2B - Instruction CPLB protection Violation,
+ handled in _cplb_hdr */
+ case VEC_CPLB_I_VL:
+ info.si_code = ILL_CPLB_VI;
+ sig = SIGILL;
+ printk(KERN_EMERG EXC_0x2B);
+ CHK_DEBUGGER_TRAP();
+ break;
+ /* 0x2C - Instruction CPLB miss, handled in _cplb_hdr */
+ case VEC_CPLB_I_M:
+ info.si_code = ILL_CPLB_MISS;
+ sig = SIGBUS;
+ printk(KERN_EMERG EXC_0x2C);
+ CHK_DEBUGGER_TRAP();
+ break;
+ /* 0x2D - Instruction CPLB Multiple Hits, handled here */
+ case VEC_CPLB_I_MHIT:
+ info.si_code = ILL_CPLB_MULHIT;
+#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
+ sig = SIGSEGV;
+ printk(KERN_EMERG "\n\nJump to address 0 - 0x0fff\n");
+#else
+ sig = SIGILL;
+ printk(KERN_EMERG EXC_0x2D);
+#endif
+ CHK_DEBUGGER_TRAP();
+ break;
+ /* 0x2E - Illegal use of Supervisor Resource, handled here */
+ case VEC_ILL_RES:
+ info.si_code = ILL_PRVOPC;
+ sig = SIGILL;
+ printk(KERN_EMERG EXC_0x2E);
+ CHK_DEBUGGER_TRAP();
+ break;
+ /* 0x2F - Reserved, Caught by default */
+ /* 0x30 - Reserved, Caught by default */
+ /* 0x31 - Reserved, Caught by default */
+ /* 0x32 - Reserved, Caught by default */
+ /* 0x33 - Reserved, Caught by default */
+ /* 0x34 - Reserved, Caught by default */
+ /* 0x35 - Reserved, Caught by default */
+ /* 0x36 - Reserved, Caught by default */
+ /* 0x37 - Reserved, Caught by default */
+ /* 0x38 - Reserved, Caught by default */
+ /* 0x39 - Reserved, Caught by default */
+ /* 0x3A - Reserved, Caught by default */
+ /* 0x3B - Reserved, Caught by default */
+ /* 0x3C - Reserved, Caught by default */
+ /* 0x3D - Reserved, Caught by default */
+ /* 0x3E - Reserved, Caught by default */
+ /* 0x3F - Reserved, Caught by default */
+ default:
+ info.si_code = TRAP_ILLTRAP;
+ sig = SIGTRAP;
+ printk(KERN_EMERG "Caught Unhandled Exception, code = %08lx\n",
+ (fp->seqstat & SEQSTAT_EXCAUSE));
+ CHK_DEBUGGER_TRAP();
+ break;
+ }
+
+ info.si_signo = sig;
+ info.si_errno = 0;
+ info.si_addr = (void *)fp->pc;
+ force_sig_info(sig, &info, current);
+ if (sig != 0 && sig != SIGTRAP) {
+ unsigned long stack;
+ dump_bfin_regs(fp, (void *)fp->retx);
+ dump_bfin_trace_buffer();
+ show_stack(current, &stack);
+ if (current->mm == NULL)
+ panic("Kernel exception");
+ }
+
+ /* if the address that we are about to return to is not valid, set it
+ * to a valid address, if we have a current application or panic
+ */
+ if (!(fp->pc <= physical_mem_end
+#if L1_CODE_LENGTH != 0
+ || (fp->pc >= L1_CODE_START &&
+ fp->pc <= (L1_CODE_START + L1_CODE_LENGTH))
+#endif
+ )) {
+ if (current->mm) {
+ fp->pc = current->mm->start_code;
+ } else {
+ printk(KERN_EMERG "I can't return to memory that doesn't exist - bad things happen\n");
+ panic("Help - I've fallen and can't get up\n");
+ }
+ }
+
+ trace_buffer_restore(j);
+ return;
+}
+
+/* Typical exception handling routines */
+
+void dump_bfin_trace_buffer(void)
+{
+ int tflags;
+ trace_buffer_save(tflags);
+
+ if (likely(bfin_read_TBUFSTAT() & TBUFCNT)) {
+ int i;
+ printk(KERN_EMERG "Hardware Trace:\n");
+ for (i = 0; bfin_read_TBUFSTAT() & TBUFCNT; i++) {
+ printk(KERN_EMERG "%2i Target : ", i);
+ printk_address((unsigned long)bfin_read_TBUF());
+ printk("\n" KERN_EMERG " Source : ");
+ printk_address((unsigned long)bfin_read_TBUF());
+ printk("\n");
+ }
+ }
+
+ trace_buffer_restore(tflags);
+}
+EXPORT_SYMBOL(dump_bfin_trace_buffer);
+
+static void show_trace(struct task_struct *tsk, unsigned long *sp)
+{
+ unsigned long addr;
+
+ printk("\nCall Trace:");
+#ifdef CONFIG_KALLSYMS
+ printk("\n");
+#endif
+
+ while (!kstack_end(sp)) {
+ addr = *sp++;
+ /*
+ * If the address is either in the text segment of the
+ * kernel, or in the region which contains vmalloc'ed
+ * memory, it *may* be the address of a calling
+ * routine; if so, print it so that someone tracing
+ * down the cause of the crash will be able to figure
+ * out the call path that was taken.
+ */
+ if (kernel_text_address(addr))
+ print_ip_sym(addr);
+ }
+
+ printk("\n");
+}
+
+void show_stack(struct task_struct *task, unsigned long *stack)
+{
+ unsigned long *endstack, addr;
+ int i;
+
+ /* Cannot call dump_bfin_trace_buffer() here as show_stack() is
+ * called externally in some places in the kernel.
+ */
+
+ if (!stack) {
+ if (task)
+ stack = (unsigned long *)task->thread.ksp;
+ else
+ stack = (unsigned long *)&stack;
+ }
+
+ addr = (unsigned long)stack;
+ endstack = (unsigned long *)PAGE_ALIGN(addr);
+
+ printk(KERN_EMERG "Stack from %08lx:", (unsigned long)stack);
+ for (i = 0; i < kstack_depth_to_print; i++) {
+ if (stack + 1 > endstack)
+ break;
+ if (i % 8 == 0)
+ printk("\n" KERN_EMERG " ");
+ printk(" %08lx", *stack++);
+ }
+
+ show_trace(task, stack);
+}
+
+void dump_stack(void)
+{
+ unsigned long stack;
+ int tflags;
+ trace_buffer_save(tflags);
+ dump_bfin_trace_buffer();
+ show_stack(current, &stack);
+ trace_buffer_restore(tflags);
+}
+
+EXPORT_SYMBOL(dump_stack);
+
+void dump_bfin_regs(struct pt_regs *fp, void *retaddr)
+{
+ if (current->pid) {
+ printk("\nCURRENT PROCESS:\n\n");
+ printk("COMM=%s PID=%d\n", current->comm, current->pid);
+ } else {
+ printk
+ ("\nNo Valid pid - Either things are really messed up, or you are in the kernel\n");
+ }
+
+ if (current->mm) {
+ printk("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);
+ }
+
+ printk("return address: 0x%p; contents of [PC-16...PC+8]:\n", retaddr);
+ if (retaddr != 0 && retaddr <= (void*)physical_mem_end
+#if L1_CODE_LENGTH != 0
+ /* FIXME: Copy the code out of L1 Instruction SRAM through dma
+ memcpy. */
+ && !(retaddr >= (void*)L1_CODE_START
+ && retaddr < (void*)(L1_CODE_START + L1_CODE_LENGTH))
+#endif
+ ) {
+ int i = 0;
+ unsigned short x = 0;
+ for (i = -16; i < 8; i++) {
+ if (get_user(x, (unsigned short *)retaddr + i))
+ break;
+#ifndef CONFIG_DEBUG_HWERR
+ /* If one of the last few instructions was a STI
+ * it is likily that the error occured awhile ago
+ * and we just noticed
+ */
+ if (x >= 0x0040 && x <= 0x0047 && i <= 0)
+ panic("\n\nWARNING : You should reconfigure the kernel to turn on\n"
+ " 'Hardware error interrupt debugging'\n"
+ " The rest of this error is meanless\n");
+#endif
+
+ if (i == -8)
+ printk("\n");
+ if (i == 0)
+ printk("X\n");
+ printk("%04x ", x);
+ }
+ } else
+ printk("Cannot look at the [PC] for it is in unreadable L1 SRAM - sorry\n");
+
+ printk("\n\n");
+
+ printk("RETE: %08lx RETN: %08lx RETX: %08lx RETS: %08lx\n",
+ fp->rete, fp->retn, fp->retx, fp->rets);
+ printk("IPEND: %04lx SYSCFG: %04lx\n", fp->ipend, fp->syscfg);
+ printk("SEQSTAT: %08lx SP: %08lx\n", (long)fp->seqstat, (long)fp);
+ printk("R0: %08lx R1: %08lx R2: %08lx R3: %08lx\n",
+ fp->r0, fp->r1, fp->r2, fp->r3);
+ printk("R4: %08lx R5: %08lx R6: %08lx R7: %08lx\n",
+ fp->r4, fp->r5, fp->r6, fp->r7);
+ printk("P0: %08lx P1: %08lx P2: %08lx P3: %08lx\n",
+ fp->p0, fp->p1, fp->p2, fp->p3);
+ printk("P4: %08lx P5: %08lx FP: %08lx\n", fp->p4, fp->p5, fp->fp);
+ printk("A0.w: %08lx A0.x: %08lx A1.w: %08lx A1.x: %08lx\n",
+ fp->a0w, fp->a0x, fp->a1w, fp->a1x);
+
+ printk("LB0: %08lx LT0: %08lx LC0: %08lx\n", fp->lb0, fp->lt0,
+ fp->lc0);
+ printk("LB1: %08lx LT1: %08lx LC1: %08lx\n", fp->lb1, fp->lt1,
+ fp->lc1);
+ printk("B0: %08lx L0: %08lx M0: %08lx I0: %08lx\n", fp->b0, fp->l0,
+ fp->m0, fp->i0);
+ printk("B1: %08lx L1: %08lx M1: %08lx I1: %08lx\n", fp->b1, fp->l1,
+ fp->m1, fp->i1);
+ printk("B2: %08lx L2: %08lx M2: %08lx I2: %08lx\n", fp->b2, fp->l2,
+ fp->m2, fp->i2);
+ printk("B3: %08lx L3: %08lx M3: %08lx I3: %08lx\n", fp->b3, fp->l3,
+ fp->m3, fp->i3);
+
+ printk("\nUSP: %08lx ASTAT: %08lx\n", rdusp(), fp->astat);
+ if ((long)fp->seqstat & SEQSTAT_EXCAUSE) {
+ printk(KERN_EMERG "DCPLB_FAULT_ADDR=%p\n", (void*)bfin_read_DCPLB_FAULT_ADDR());
+ printk(KERN_EMERG "ICPLB_FAULT_ADDR=%p\n", (void*)bfin_read_ICPLB_FAULT_ADDR());
+ }
+
+ printk("\n\n");
+}
+
+#ifdef CONFIG_SYS_BFIN_SPINLOCK_L1
+asmlinkage int sys_bfin_spinlock(int *spinlock)__attribute__((l1_text));
+#endif
+
+asmlinkage int sys_bfin_spinlock(int *spinlock)
+{
+ int ret = 0;
+ int tmp = 0;
+
+ local_irq_disable();
+ ret = get_user(tmp, spinlock);
+ if (ret == 0) {
+ if (tmp)
+ ret = 1;
+ tmp = 1;
+ put_user(tmp, spinlock);
+ }
+ local_irq_enable();
+ return ret;
+}
+
+void panic_cplb_error(int cplb_panic, struct pt_regs *fp)
+{
+ switch (cplb_panic) {
+ case CPLB_NO_UNLOCKED:
+ printk(KERN_EMERG "All CPLBs are locked\n");
+ break;
+ case CPLB_PROT_VIOL:
+ return;
+ case CPLB_NO_ADDR_MATCH:
+ return;
+ case CPLB_UNKNOWN_ERR:
+ printk(KERN_EMERG "Unknown CPLB Exception\n");
+ break;
+ }
+
+ printk(KERN_EMERG "DCPLB_FAULT_ADDR=%p\n", (void*)bfin_read_DCPLB_FAULT_ADDR());
+ printk(KERN_EMERG "ICPLB_FAULT_ADDR=%p\n", (void*)bfin_read_ICPLB_FAULT_ADDR());
+ dump_bfin_regs(fp, (void *)fp->retx);
+ dump_stack();
+ panic("Unrecoverable event\n");
+}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.