diff options
| author | David Howells <dhowells@redhat.com> | 2008-04-10 16:10:55 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-10 13:41:29 -0700 |
| commit | e31c243f984628d02f045dc4b622f1e2827860dc (patch) | |
| tree | cd2ac2f33c7da86b515087260d93179b31fd1671 /arch/frv/kernel/entry-table.S | |
| parent | 0c93d8e4d342b1b5cda1037f2527fcf443c80fbc (diff) | |
FRV: Add support for emulation of userspace atomic ops [try #2]
Use traps 120-126 to emulate atomic cmpxchg32, xchg32, and XOR-, OR-, AND-, SUB-
and ADD-to-memory operations for userspace.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/frv/kernel/entry-table.S')
| -rw-r--r-- | arch/frv/kernel/entry-table.S | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/frv/kernel/entry-table.S b/arch/frv/kernel/entry-table.S index d3b9253d862a..bf35f33e48c9 100644 --- a/arch/frv/kernel/entry-table.S +++ b/arch/frv/kernel/entry-table.S @@ -316,8 +316,14 @@ __trap_fixup_kernel_data_tlb_miss: .section .trap.vector .org TBR_TT_TRAP0 >> 2 .long system_call - .rept 126 + .rept 119 .long __entry_unsupported_trap .endr + + # userspace atomic op emulation, traps 120-126 + .rept 7 + .long __entry_atomic_op + .endr + .org TBR_TT_BREAK >> 2 .long __entry_debug_exception |