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

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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>
This commit is contained in:
Kirill A. Shutemov
2009-09-25 13:39:47 +01:00
committed by Russell King
parent 6806bfe18f
commit 4fb2847437
33 changed files with 144 additions and 78 deletions
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7
arch/arm/kernel/entry-common.S
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@ -425,13 +425,6 @@ sys_mmap2:
#endif
ENDPROC(sys_mmap2)
ENTRY(pabort_ifar)
mrc p15, 0, r0, cr6, cr0, 2
ENTRY(pabort_noifar)
mov pc, lr
ENDPROC(pabort_ifar)
ENDPROC(pabort_noifar)
#ifdef CONFIG_OABI_COMPAT
/*