tree e2015dbc54178dd114eb0c41fa5a29d89dd15b41
parent 6806bfe18fca92e2001538b84cab5f63c5ea4bed
author Kirill A. Shutemov <kirill@shutemov.name> 1253882387 +0100
committer Russell King <rmk+kernel@arm.linux.org.uk> 1254519272 +0100

ARM: 5727/1: Pass IFSR register to do_PrefetchAbort()

Instruction fault status register, IFSR, was introduced on ARMv6 to
provide status information about the last insturction fault. It
needed for proper prefetch abort handling.

Now we have three prefetch abort model:

  * legacy - for CPUs before ARMv6. They doesn't provide neither
    IFSR nor IFAR. We simulate IFSR with section translation fault
    status for them to generalize code;
  * ARMv6 - provides IFSR, but not IFAR;
  * ARMv7 - provides both IFSR and IFAR.

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>