linux-toradex.git/arch/microblaze/kernel/entry-nommu.S, branch v3.1.2 Linux kernel for Apalis and Colibri modules microblaze: Do not use "la" pseudo instruction - use addik instead 2011-03-09T07:09:54+00:00 Michal Simek monstr@monstr.eu 2011-02-01T08:00:57+00:00 cd3415779bdb13e3daaf13965c89d286a0cf0480 "la" pseudo instruction is only translation to "addik". Use directly "addik" which is described in the MB reference guide. Signed-off-by: Michal Simek <monstr@monstr.eu> 
"la" pseudo instruction is only translation to "addik".
Use directly "addik" which is described in the MB reference guide.

Signed-off-by: Michal Simek <monstr@monstr.eu>
microblaze: Add stack unwinder 2010-08-04T08:22:35+00:00 Steven J. Magnani steve@digidescorp.com 2010-04-27T17:37:54+00:00 ce3266c047389443d5f433d605c769e878cbe46e Implement intelligent backtracing by searching for stack frame creation, and emitting only return addresses. Use print_hex_dump() to display the entire binary kernel stack. Limitation: MMU kernels are not currently able to trace beyond a system trap (interrupt, syscall, etc.). It is the intent of this patch to provide infrastructure that can be extended to add this capability later. Changes from V1: * Removed checks in find_frame_creation() that prevented location of the frame creation instruction in heavily optimized code * Various formatting/commenting/file location tweaks per review comments * Dropped Kconfig option to enable STACKTRACE as something logically separate Signed-off-by: Steven J. Magnani <steve@digidescorp.com> 
Implement intelligent backtracing by searching for stack frame creation,
and emitting only return addresses. Use print_hex_dump() to display the
entire binary kernel stack.

Limitation: MMU kernels are not currently able to trace beyond a system trap
(interrupt, syscall, etc.). It is the intent of this patch to provide
infrastructure that can be extended to add this capability later.

Changes from V1:
* Removed checks in find_frame_creation() that prevented location of the frame
  creation instruction in heavily optimized code
* Various formatting/commenting/file location tweaks per review comments
* Dropped Kconfig option to enable STACKTRACE as something logically separate

Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
microblaze: re-enable interrupts before calling schedule 2010-05-13T07:21:01+00:00 Steven J. Magnani steve@digidescorp.com 2010-04-27T18:00:23+00:00 0d5961b7f612f8f54fd6fbe1942cdfb141cddfb9 schedule() should not be called with interrupts disabled. Signed-off-by: Steven J. Magnani <steve@digidescorp.com> Signed-off-by: Michal Simek <monstr@monstr.eu> 
schedule() should not be called with interrupts disabled.

Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
microblaze: fix interrupt state restore 2010-02-03T12:17:44+00:00 Steven J. Magnani steve@digidescorp.com 2010-02-01T12:34:45+00:00 58424a49cb99c4ad9386b47f885b352476313a02 Interrupts must be disabled while an interrupt state restore (prep for interrupt return) is in progress. Code to do this was lost in the port to the mainline kernel. Signed-off-by: Steven J. Magnani <steve@digidescorp.com> Signed-off-by: Michal Simek <monstr@monstr.eu> 
Interrupts must be disabled while an interrupt state restore
(prep for interrupt return) is in progress.
Code to do this was lost in the port to the mainline kernel.

Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
microblaze: nommu: Don't clobber R11 on syscalls 2009-12-14T07:45:11+00:00 steve@digidescorp.com steve@digidescorp.com 2009-12-09T23:13:42+00:00 825c9a359ecd6ba2569e6c38199e7d072ab388e3 The noMMU syscall trap has a bug that causes R11 to be zero on return to userland. Remove the extra "save" of R11 responsible for the bug. Remove reloading of mode indicator because r11 already contains it. Signed-off-by: Steven J. Magnani <steve@digidescorp.com> Signed-off-by: Michal Simek <monstr@monstr.eu> 
The noMMU syscall trap has a bug that causes R11 to be zero on return to
userland. Remove the extra "save" of R11 responsible for the bug.

Remove reloading of mode indicator because r11 already contains it.

Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
microblaze: use generic syscalls.h 2009-07-06T08:26:59+00:00 Arnd Bergmann arnd@arndb.de 2009-06-18T17:55:30+00:00 e513588f75912f022677866244de6b19b98b8d9a The prototypes in syscalls.h all make sense for microblaze, but for some of them, the actual implementation in sys_microblaze.c needs to be adapted. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Michal Simek <monstr@monstr.eu> 
The prototypes in syscalls.h all make sense for
microblaze, but for some of them, the actual implementation
in sys_microblaze.c needs to be adapted.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michal Simek <monstr@monstr.eu>
microblaze: clean up signal handling 2009-07-06T08:26:57+00:00 Arnd Bergmann arnd@arndb.de 2009-06-18T17:55:29+00:00 3183e06863f49a500fc76427db4d60825a26f81b When legacy signal handling is disabled, the arch/microblaze/kernel/signal.c implementation can be much simpler, as most of it is handled generically from kernel/signal.c. This is also a prerequisite for using the generic asm/unistd.h, which does not provide __NR_sigreturn, because this macro is referenced by the current signal.c implementation. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Michal Simek <monstr@monstr.eu> 
When legacy signal handling is disabled, the
arch/microblaze/kernel/signal.c implementation can
be much simpler, as most of it is handled generically
from kernel/signal.c.

This is also a prerequisite for using the generic
asm/unistd.h, which does not provide __NR_sigreturn,
because this macro is referenced by the current signal.c
implementation.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michal Simek <monstr@monstr.eu>
microblaze_mmu_v2: Enable fork syscall for MMU and add fork as vfork for noMMU 2009-05-26T14:45:21+00:00 Michal Simek monstr@monstr.eu 2009-05-26T14:30:26+00:00 65504a47e02e4e6e58884376f4a700f83cc8234f Signed-off-by: Michal Simek <monstr@monstr.eu> 
Signed-off-by: Michal Simek <monstr@monstr.eu>
microblaze_v8: assembler files head.S, entry-nommu.S, syscall_table.S 2009-03-27T13:25:20+00:00 Michal Simek monstr@monstr.eu 2009-03-27T13:25:20+00:00 6d5af1a35f363d3bca7ecb4560102ff94f792186 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> 
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>