Handle data aborts gracefully

[Sascha Hauer]

With this series the md command no longer aborts on inaccessible memory
but instead prints a nice 'XXXXXXXX' for this area. Based on original work
by Jan. I changed it to be compilable on !ARM. It happened that the i.MX6
PCIe controller needs exactly this support, so I continued working on this
patch.

Sascha

----------------------------------------------------------------
Jan Luebbe (1):
      ARM/mem: handle data aborts gracefully for md

Sascha Hauer (1):
      ARM: Allow to mask data aborts

 arch/arm/cpu/exceptions.S      | 22 ++++++++++++++++++++++
 arch/arm/cpu/interrupts.c      | 17 +++++++++++++++++
 arch/arm/include/asm/barebox.h |  4 ++++
 common/memory_display.c        | 34 +++++++++++++++++++++++++++++-----
 include/abort.h                | 37 +++++++++++++++++++++++++++++++++++++
 5 files changed, 109 insertions(+), 5 deletions(-)
 create mode 100644 include/abort.h