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* microblaze: Raise SIGFPE/FPE_INTDIV for div by zeroEdgar E. Iglesias2011-10-141-1/+1
| | | | | | | | | It fixes the signal nr raised for divizion by zero from SIGILL to SIGFPE, in accordance to POSIX and other archs. This came up due to a failed test in the GCC testsuite. Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
* microblaze: Fix sparse warning - sw_exceptionsMichal Simek2011-03-091-1/+1
| | | | | | | | | | Function sw_exception is linked with asm code. Warning log: CHECK arch/microblaze/kernel/exceptions.c arch/microblaze/kernel/exceptions.c:53:6: warning: symbol 'sw_exception' was not declared. Should it be static? Signed-off-by: Michal Simek <monstr@monstr.eu>
* microblaze: Clear i/dcache for sw breakpointsMichal Simek2011-01-031-0/+3
| | | | | | | | | | There is necessary to flush dcache and invalidate icache for address where breakpoint (brki r16, 0x18) was. The reason is that for some cases icache line still keeps brki instruction and it is not updated by origin instruction maintains by gdbserver. Signed-off-by: Michal Simek <monstr@monstr.eu>
* microblaze: Remove old user debugging gdb stubMichal Simek2010-10-211-8/+1
| | | | | | | | Old gdb uses priviledged exception handler to handle gdb exception. New gdb uses brki r16, 0x18 that's why we can remove old gdb support. Signed-off-by: Michal Simek <monstr@monstr.eu>
* microblaze: Remove pr_<level> uses of KERN_<level>Joe Perches2010-10-211-10/+6
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
* microblaze: Add KGDB supportMichal Simek2010-08-041-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | Kgdb uses brki r16, 0x18 instruction to call low level _debug_exception function which save current state to pt_regs and call microblaze_kgdb_break function. _debug_exception should be called only from the kernel space. User space calling is not supported because user application debugging uses different handling. pt_regs_to_gdb_regs loads additional special registers which can't be changed * Enable KGDB in Kconfig * Remove ancient not-tested KGDB support * Remove ancient _debug_exception code from entry.S Only MMU KGDB support is supported. Signed-off-by: Michal Simek <monstr@monstr.eu> CC: Jason Wessel <jason.wessel@windriver.com> CC: John Williams <john.williams@petalogix.com> CC: Edgar E. Iglesias <edgar.iglesias@petalogix.com> CC: linux-kernel@vger.kernel.org Acked-by: Jason Wessel <jason.wessel@windriver.com>
* microblaze: Support brki rX, 0x18 for user application debuggingMichal Simek2010-08-041-1/+7
| | | | | | | | | | | | | This is the first patch which add support for user application debugging through brki rX, 0x18 vector. This patch has side effect which also remove security issue to use brki rX, 0x18 to freeze kernel. Support for old gdb support via priviledged exception (brk r0, r0) is still there. It will be remove in future. Signed-off-by: Michal Simek <monstr@monstr.eu>
* microblaze: fix divide by zero exception messageRandy Dunlap2010-05-061-1/+1
| | | | | | | | | Fix divide exception message to say "divide by zero". Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Michal Simek <monstr@monstr.eu> Cc: microblaze-uclinux@itee.uq.edu.au Signed-off-by: Michal Simek <monstr@monstr.eu>
* microblaze: Generate correct signal and siginfo for integer div-by-zeroMichal Simek2009-09-221-1/+1
| | | | Signed-off-by: John Williams <john.williams@petalogix.com>
* microblaze: Don't be noisy when userspace causes hardware exceptionsMichal Simek2009-09-221-11/+20
| | | | Signed-off-by: Michal Simek <monstr@monstr.eu>
* microblaze_mmu_v2: Add MMU related exceptions handlingMichal Simek2009-05-261-8/+37
| | | | Signed-off-by: Michal Simek <monstr@monstr.eu>
* microblaze_v8: exception handlingMichal Simek2009-03-271-0/+124
Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
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