![Robin Getz](/assets/img/avatar_default.png)
Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
690 lines
19 KiB
C
690 lines
19 KiB
C
/*
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* File: arch/blackfin/kernel/traps.c
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* Based on:
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* Author: Hamish Macdonald
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*
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* Created:
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* Description: uses S/W interrupt 15 for the system calls
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*
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* Modified:
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* Copyright 2004-2006 Analog Devices Inc.
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*
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* Bugs: Enter bugs at http://blackfin.uclinux.org/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <asm/uaccess.h>
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#include <asm/traps.h>
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#include <asm/cacheflush.h>
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#include <asm/blackfin.h>
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#include <asm/uaccess.h>
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#include <asm/irq_handler.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/kallsyms.h>
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#ifdef CONFIG_KGDB
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# include <linux/debugger.h>
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# include <linux/kgdb.h>
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#endif
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/* Initiate the event table handler */
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void __init trap_init(void)
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{
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CSYNC();
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bfin_write_EVT3(trap);
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CSYNC();
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}
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asmlinkage void trap_c(struct pt_regs *fp);
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int kstack_depth_to_print = 48;
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static int printk_address(unsigned long address)
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{
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struct vm_list_struct *vml;
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struct task_struct *p;
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struct mm_struct *mm;
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unsigned long offset;
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#ifdef CONFIG_KALLSYMS
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unsigned long symsize;
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const char *symname;
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char *modname;
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char *delim = ":";
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char namebuf[128];
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/* look up the address and see if we are in kernel space */
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symname = kallsyms_lookup(address, &symsize, &offset, &modname, namebuf);
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if (symname) {
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/* yeah! kernel space! */
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if (!modname)
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modname = delim = "";
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return printk("<0x%p> { %s%s%s%s + 0x%lx }",
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(void*)address, delim, modname, delim, symname,
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(unsigned long)offset);
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}
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#endif
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/* looks like we're off in user-land, so let's walk all the
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* mappings of all our processes and see if we can't be a whee
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* bit more specific
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*/
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write_lock_irq(&tasklist_lock);
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for_each_process(p) {
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mm = get_task_mm(p);
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if (!mm)
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continue;
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vml = mm->context.vmlist;
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while (vml) {
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struct vm_area_struct *vma = vml->vma;
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if (address >= vma->vm_start && address < vma->vm_end) {
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char *name = p->comm;
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struct file *file = vma->vm_file;
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if (file) {
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char _tmpbuf[256];
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name = d_path(file->f_dentry,
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file->f_vfsmnt,
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_tmpbuf,
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sizeof(_tmpbuf));
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}
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/* FLAT does not have its text aligned to the start of
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* the map while FDPIC ELF does ...
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*/
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if (current->mm &&
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(address > current->mm->start_code) &&
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(address < current->mm->end_code))
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offset = address - current->mm->start_code;
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else
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offset = (address - vma->vm_start) + (vma->vm_pgoff << PAGE_SHIFT);
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write_unlock_irq(&tasklist_lock);
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return printk("<0x%p> [ %s + 0x%lx ]",
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(void*)address, name, offset);
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}
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vml = vml->next;
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}
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}
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write_unlock_irq(&tasklist_lock);
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/* we were unable to find this address anywhere */
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return printk("[<0x%p>]", (void*)address);
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}
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#define trace_buffer_save(x) \
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do { \
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(x) = bfin_read_TBUFCTL(); \
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bfin_write_TBUFCTL((x) & ~TBUFEN); \
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} while (0)
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#define trace_buffer_restore(x) \
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do { \
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bfin_write_TBUFCTL((x)); \
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} while (0)
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asmlinkage void trap_c(struct pt_regs *fp)
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{
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int j, sig = 0;
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siginfo_t info;
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unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE;
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#ifdef CONFIG_KGDB
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# define CHK_DEBUGGER_TRAP() \
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do { \
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CHK_DEBUGGER(trapnr, sig, info.si_code, fp); \
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} while (0)
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# define CHK_DEBUGGER_TRAP_MAYBE() \
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do { \
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if (kgdb_connected) \
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CHK_DEBUGGER_TRAP(); \
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} while (0)
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#else
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# define CHK_DEBUGGER_TRAP() do { } while (0)
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# define CHK_DEBUGGER_TRAP_MAYBE() do { } while (0)
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#endif
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trace_buffer_save(j);
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/* trap_c() will be called for exceptions. During exceptions
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* processing, the pc value should be set with retx value.
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* With this change we can cleanup some code in signal.c- TODO
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*/
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fp->orig_pc = fp->retx;
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/* printk("exception: 0x%x, ipend=%x, reti=%x, retx=%x\n",
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trapnr, fp->ipend, fp->pc, fp->retx); */
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/* send the appropriate signal to the user program */
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switch (trapnr) {
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/* This table works in conjuction with the one in ./mach-common/entry.S
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* Some exceptions are handled there (in assembly, in exception space)
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* Some are handled here, (in C, in interrupt space)
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* Some, like CPLB, are handled in both, where the normal path is
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* handled in assembly/exception space, and the error path is handled
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* here
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*/
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/* 0x00 - Linux Syscall, getting here is an error */
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/* 0x01 - userspace gdb breakpoint, handled here */
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case VEC_EXCPT01:
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info.si_code = TRAP_ILLTRAP;
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sig = SIGTRAP;
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CHK_DEBUGGER_TRAP_MAYBE();
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/* Check if this is a breakpoint in kernel space */
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if (fp->ipend & 0xffc0)
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return;
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else
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break;
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#ifdef CONFIG_KGDB
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case VEC_EXCPT02 : /* gdb connection */
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info.si_code = TRAP_ILLTRAP;
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sig = SIGTRAP;
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CHK_DEBUGGER_TRAP();
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return;
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#else
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/* 0x02 - User Defined, Caught by default */
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#endif
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/* 0x03 - Atomic test and set */
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case VEC_EXCPT03:
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info.si_code = SEGV_STACKFLOW;
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sig = SIGSEGV;
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printk(KERN_EMERG EXC_0x03);
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CHK_DEBUGGER_TRAP();
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break;
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/* 0x04 - spinlock - handled by _ex_spinlock,
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getting here is an error */
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/* 0x05 - User Defined, Caught by default */
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/* 0x06 - User Defined, Caught by default */
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/* 0x07 - User Defined, Caught by default */
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/* 0x08 - User Defined, Caught by default */
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/* 0x09 - User Defined, Caught by default */
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/* 0x0A - User Defined, Caught by default */
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/* 0x0B - User Defined, Caught by default */
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/* 0x0C - User Defined, Caught by default */
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/* 0x0D - User Defined, Caught by default */
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/* 0x0E - User Defined, Caught by default */
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/* 0x0F - User Defined, Caught by default */
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/* 0x10 HW Single step, handled here */
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case VEC_STEP:
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info.si_code = TRAP_STEP;
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sig = SIGTRAP;
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CHK_DEBUGGER_TRAP_MAYBE();
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/* Check if this is a single step in kernel space */
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if (fp->ipend & 0xffc0)
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return;
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else
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break;
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/* 0x11 - Trace Buffer Full, handled here */
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case VEC_OVFLOW:
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info.si_code = TRAP_TRACEFLOW;
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sig = SIGTRAP;
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printk(KERN_EMERG EXC_0x11);
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CHK_DEBUGGER_TRAP();
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break;
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/* 0x12 - Reserved, Caught by default */
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/* 0x13 - Reserved, Caught by default */
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/* 0x14 - Reserved, Caught by default */
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/* 0x15 - Reserved, Caught by default */
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/* 0x16 - Reserved, Caught by default */
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/* 0x17 - Reserved, Caught by default */
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/* 0x18 - Reserved, Caught by default */
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/* 0x19 - Reserved, Caught by default */
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/* 0x1A - Reserved, Caught by default */
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/* 0x1B - Reserved, Caught by default */
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/* 0x1C - Reserved, Caught by default */
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/* 0x1D - Reserved, Caught by default */
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/* 0x1E - Reserved, Caught by default */
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/* 0x1F - Reserved, Caught by default */
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/* 0x20 - Reserved, Caught by default */
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/* 0x21 - Undefined Instruction, handled here */
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case VEC_UNDEF_I:
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info.si_code = ILL_ILLOPC;
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sig = SIGILL;
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printk(KERN_EMERG EXC_0x21);
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CHK_DEBUGGER_TRAP();
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break;
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/* 0x22 - Illegal Instruction Combination, handled here */
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case VEC_ILGAL_I:
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info.si_code = ILL_ILLPARAOP;
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sig = SIGILL;
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printk(KERN_EMERG EXC_0x22);
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CHK_DEBUGGER_TRAP();
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break;
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/* 0x23 - Data CPLB Protection Violation,
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normal case is handled in _cplb_hdr */
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case VEC_CPLB_VL:
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info.si_code = ILL_CPLB_VI;
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sig = SIGILL;
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printk(KERN_EMERG EXC_0x23);
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CHK_DEBUGGER_TRAP();
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break;
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/* 0x24 - Data access misaligned, handled here */
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case VEC_MISALI_D:
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info.si_code = BUS_ADRALN;
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sig = SIGBUS;
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printk(KERN_EMERG EXC_0x24);
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CHK_DEBUGGER_TRAP();
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break;
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/* 0x25 - Unrecoverable Event, handled here */
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case VEC_UNCOV:
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info.si_code = ILL_ILLEXCPT;
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sig = SIGILL;
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printk(KERN_EMERG EXC_0x25);
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CHK_DEBUGGER_TRAP();
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break;
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/* 0x26 - Data CPLB Miss, normal case is handled in _cplb_hdr,
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error case is handled here */
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case VEC_CPLB_M:
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info.si_code = BUS_ADRALN;
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sig = SIGBUS;
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printk(KERN_EMERG EXC_0x26);
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CHK_DEBUGGER_TRAP();
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break;
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/* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero, handled here */
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case VEC_CPLB_MHIT:
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info.si_code = ILL_CPLB_MULHIT;
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#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
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sig = SIGSEGV;
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printk(KERN_EMERG "\n"
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KERN_EMERG "NULL pointer access (probably)\n");
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#else
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sig = SIGILL;
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printk(KERN_EMERG EXC_0x27);
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#endif
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CHK_DEBUGGER_TRAP();
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break;
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/* 0x28 - Emulation Watchpoint, handled here */
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case VEC_WATCH:
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info.si_code = TRAP_WATCHPT;
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sig = SIGTRAP;
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pr_debug(EXC_0x28);
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CHK_DEBUGGER_TRAP_MAYBE();
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/* Check if this is a watchpoint in kernel space */
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if (fp->ipend & 0xffc0)
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return;
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else
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break;
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#ifdef CONFIG_BF535
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/* 0x29 - Instruction fetch access error (535 only) */
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case VEC_ISTRU_VL: /* ADSP-BF535 only (MH) */
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info.si_code = BUS_OPFETCH;
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sig = SIGBUS;
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printk(KERN_EMERG "BF535: VEC_ISTRU_VL\n");
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CHK_DEBUGGER_TRAP();
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break;
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#else
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/* 0x29 - Reserved, Caught by default */
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#endif
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/* 0x2A - Instruction fetch misaligned, handled here */
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case VEC_MISALI_I:
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info.si_code = BUS_ADRALN;
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sig = SIGBUS;
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printk(KERN_EMERG EXC_0x2A);
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CHK_DEBUGGER_TRAP();
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break;
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/* 0x2B - Instruction CPLB protection Violation,
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handled in _cplb_hdr */
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case VEC_CPLB_I_VL:
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info.si_code = ILL_CPLB_VI;
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sig = SIGILL;
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printk(KERN_EMERG EXC_0x2B);
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CHK_DEBUGGER_TRAP();
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break;
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/* 0x2C - Instruction CPLB miss, handled in _cplb_hdr */
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case VEC_CPLB_I_M:
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info.si_code = ILL_CPLB_MISS;
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sig = SIGBUS;
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printk(KERN_EMERG EXC_0x2C);
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CHK_DEBUGGER_TRAP();
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break;
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/* 0x2D - Instruction CPLB Multiple Hits, handled here */
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case VEC_CPLB_I_MHIT:
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info.si_code = ILL_CPLB_MULHIT;
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#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
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sig = SIGSEGV;
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printk(KERN_EMERG "\n\nJump to address 0 - 0x0fff\n");
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#else
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sig = SIGILL;
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printk(KERN_EMERG EXC_0x2D);
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#endif
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CHK_DEBUGGER_TRAP();
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break;
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/* 0x2E - Illegal use of Supervisor Resource, handled here */
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case VEC_ILL_RES:
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info.si_code = ILL_PRVOPC;
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sig = SIGILL;
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printk(KERN_EMERG EXC_0x2E);
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CHK_DEBUGGER_TRAP();
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break;
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/* 0x2F - Reserved, Caught by default */
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/* 0x30 - Reserved, Caught by default */
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/* 0x31 - Reserved, Caught by default */
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/* 0x32 - Reserved, Caught by default */
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/* 0x33 - Reserved, Caught by default */
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/* 0x34 - Reserved, Caught by default */
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/* 0x35 - Reserved, Caught by default */
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/* 0x36 - Reserved, Caught by default */
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/* 0x37 - Reserved, Caught by default */
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/* 0x38 - Reserved, Caught by default */
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/* 0x39 - Reserved, Caught by default */
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/* 0x3A - Reserved, Caught by default */
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/* 0x3B - Reserved, Caught by default */
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/* 0x3C - Reserved, Caught by default */
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/* 0x3D - Reserved, Caught by default */
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/* 0x3E - Reserved, Caught by default */
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/* 0x3F - Reserved, Caught by default */
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default:
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info.si_code = TRAP_ILLTRAP;
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sig = SIGTRAP;
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printk(KERN_EMERG "Caught Unhandled Exception, code = %08lx\n",
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(fp->seqstat & SEQSTAT_EXCAUSE));
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CHK_DEBUGGER_TRAP();
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break;
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}
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info.si_signo = sig;
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info.si_errno = 0;
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info.si_addr = (void *)fp->pc;
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force_sig_info(sig, &info, current);
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if (sig != 0 && sig != SIGTRAP) {
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unsigned long stack;
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dump_bfin_regs(fp, (void *)fp->retx);
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dump_bfin_trace_buffer();
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show_stack(current, &stack);
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if (current->mm == NULL)
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panic("Kernel exception");
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}
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/* if the address that we are about to return to is not valid, set it
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* to a valid address, if we have a current application or panic
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*/
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if (!(fp->pc <= physical_mem_end
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#if L1_CODE_LENGTH != 0
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|| (fp->pc >= L1_CODE_START &&
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fp->pc <= (L1_CODE_START + L1_CODE_LENGTH))
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#endif
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)) {
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if (current->mm) {
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fp->pc = current->mm->start_code;
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} else {
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printk(KERN_EMERG
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"I can't return to memory that doesn't exist"
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" - bad things happen\n");
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panic("Help - I've fallen and can't get up\n");
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}
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}
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trace_buffer_restore(j);
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return;
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}
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/* Typical exception handling routines */
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void dump_bfin_trace_buffer(void)
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{
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int tflags;
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trace_buffer_save(tflags);
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if (likely(bfin_read_TBUFSTAT() & TBUFCNT)) {
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int i;
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printk(KERN_EMERG "Hardware Trace:\n");
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for (i = 0; bfin_read_TBUFSTAT() & TBUFCNT; i++) {
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printk(KERN_EMERG "%2i Target : ", i);
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printk_address((unsigned long)bfin_read_TBUF());
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printk("\n" KERN_EMERG " Source : ");
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printk_address((unsigned long)bfin_read_TBUF());
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printk("\n");
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}
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}
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trace_buffer_restore(tflags);
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}
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EXPORT_SYMBOL(dump_bfin_trace_buffer);
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static void show_trace(struct task_struct *tsk, unsigned long *sp)
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{
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unsigned long addr;
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printk("\nCall Trace:");
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#ifdef CONFIG_KALLSYMS
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printk("\n");
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#endif
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while (!kstack_end(sp)) {
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addr = *sp++;
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/*
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* If the address is either in the text segment of the
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* kernel, or in the region which contains vmalloc'ed
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* memory, it *may* be the address of a calling
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* routine; if so, print it so that someone tracing
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* down the cause of the crash will be able to figure
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* out the call path that was taken.
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*/
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if (kernel_text_address(addr))
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|
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(KERN_EMERG "\n" KERN_EMERG "CURRENT PROCESS:\n"
|
|
KERN_EMERG "\n");
|
|
printk(KERN_EMERG "COMM=%s PID=%d\n",
|
|
current->comm, current->pid);
|
|
} else {
|
|
printk
|
|
(KERN_EMERG "\n" KERN_EMERG
|
|
"No Valid pid - Either things are really messed up,"
|
|
" or you are in the kernel\n");
|
|
}
|
|
|
|
if (current->mm) {
|
|
printk(KERN_EMERG "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n"
|
|
KERN_EMERG "BSS = 0x%p-0x%p USER-STACK = 0x%p\n"
|
|
KERN_EMERG "\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(KERN_EMERG "return address: [0x%p]; contents of:", 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 = ((unsigned int)retaddr & 0xFFFFFFF0) - 32;
|
|
unsigned short x = 0;
|
|
for (; i < ((unsigned int)retaddr & 0xFFFFFFF0 ) + 32 ;
|
|
i += 2) {
|
|
if ( !(i & 0xF) )
|
|
printk(KERN_EMERG "\n" KERN_EMERG
|
|
"0x%08x: ", i);
|
|
|
|
if (get_user(x, (unsigned short *)i))
|
|
break;
|
|
#ifndef CONFIG_DEBUG_HWERR
|
|
/* If one of the last few instructions was a STI
|
|
* it is likely 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 == (unsigned int)retaddr )
|
|
printk("[%04x]", x);
|
|
else
|
|
printk(" %04x ", x);
|
|
}
|
|
printk("\n" KERN_EMERG "\n");
|
|
} else
|
|
printk(KERN_EMERG
|
|
"Cannot look at the [PC] for it is"
|
|
"in unreadable L1 SRAM - sorry\n");
|
|
|
|
|
|
printk(KERN_EMERG
|
|
"RETE: %08lx RETN: %08lx RETX: %08lx RETS: %08lx\n",
|
|
fp->rete, fp->retn, fp->retx, fp->rets);
|
|
printk(KERN_EMERG "IPEND: %04lx SYSCFG: %04lx\n",
|
|
fp->ipend, fp->syscfg);
|
|
printk(KERN_EMERG "SEQSTAT: %08lx SP: %08lx\n",
|
|
(long)fp->seqstat, (long)fp);
|
|
printk(KERN_EMERG "R0: %08lx R1: %08lx R2: %08lx R3: %08lx\n",
|
|
fp->r0, fp->r1, fp->r2, fp->r3);
|
|
printk(KERN_EMERG "R4: %08lx R5: %08lx R6: %08lx R7: %08lx\n",
|
|
fp->r4, fp->r5, fp->r6, fp->r7);
|
|
printk(KERN_EMERG "P0: %08lx P1: %08lx P2: %08lx P3: %08lx\n",
|
|
fp->p0, fp->p1, fp->p2, fp->p3);
|
|
printk(KERN_EMERG
|
|
"P4: %08lx P5: %08lx FP: %08lx\n",
|
|
fp->p4, fp->p5, fp->fp);
|
|
printk(KERN_EMERG
|
|
"A0.w: %08lx A0.x: %08lx A1.w: %08lx A1.x: %08lx\n",
|
|
fp->a0w, fp->a0x, fp->a1w, fp->a1x);
|
|
|
|
printk(KERN_EMERG "LB0: %08lx LT0: %08lx LC0: %08lx\n",
|
|
fp->lb0, fp->lt0, fp->lc0);
|
|
printk(KERN_EMERG "LB1: %08lx LT1: %08lx LC1: %08lx\n",
|
|
fp->lb1, fp->lt1, fp->lc1);
|
|
printk(KERN_EMERG "B0: %08lx L0: %08lx M0: %08lx I0: %08lx\n",
|
|
fp->b0, fp->l0, fp->m0, fp->i0);
|
|
printk(KERN_EMERG "B1: %08lx L1: %08lx M1: %08lx I1: %08lx\n",
|
|
fp->b1, fp->l1, fp->m1, fp->i1);
|
|
printk(KERN_EMERG "B2: %08lx L2: %08lx M2: %08lx I2: %08lx\n",
|
|
fp->b2, fp->l2, fp->m2, fp->i2);
|
|
printk(KERN_EMERG "B3: %08lx L3: %08lx M3: %08lx I3: %08lx\n",
|
|
fp->b3, fp->l3, fp->m3, fp->i3);
|
|
|
|
printk(KERN_EMERG "\n" KERN_EMERG "USP: %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");
|
|
}
|