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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-04-19 17:17:29 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-04-19 17:17:29 +0100 |
| commit | adf6d34e460387ee3e8f1e1875d52bff51212c7d (patch) | |
| tree | 88ef100143e6184103a608f82dfd232bf6376eaf /arch/frv/kernel/entry.S | |
| parent | d1964dab60ce7c104dd21590e987a8787db18051 (diff) | |
| parent | 3760d31f11bfbd0ead9eaeb8573e0602437a9d7c (diff) | |
Merge branch 'omap2-upstream' into devel
Diffstat (limited to 'arch/frv/kernel/entry.S')
| -rw-r--r-- | arch/frv/kernel/entry.S | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/frv/kernel/entry.S b/arch/frv/kernel/entry.S index f36d7f4a7c25..b8a4b94779b1 100644 --- a/arch/frv/kernel/entry.S +++ b/arch/frv/kernel/entry.S @@ -656,6 +656,26 @@ __entry_debug_exception: ############################################################################### # +# handle atomic operation emulation for userspace +# +############################################################################### + .globl __entry_atomic_op +__entry_atomic_op: + LEDS 0x6012 + sethi.p %hi(atomic_operation),gr5 + setlo %lo(atomic_operation),gr5 + movsg esfr1,gr8 + movsg epcr0,gr9 + movsg esr0,gr10 + + # now that we've accessed the exception regs, we can enable exceptions + movsg psr,gr4 + ori gr4,#PSR_ET,gr4 + movgs gr4,psr + jmpl @(gr5,gr0) ; call atomic_operation(esfr1,epcr0,esr0) + +############################################################################### +# # handle media exception # ############################################################################### |