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openrisc: include l.swa in check for write data pagefault

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During page fault handling we check the last instruction to understand
if the fault was for a read or for a write.  By default we fall back to
read.  New instructions were added to the openrisc 1.1 spec for an
atomic load/store pair (l.lwa/l.swa).

This patch adds the opcode for l.swa (0x33) allowing it to be treated as
a write operation.

Signed-off-by: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
[shorne@gmail.com: expanded a bit on the comment]
Signed-off-by: Stafford Horne <shorne@gmail.com>
This commit is contained in:
Stefan Kristiansson 2014-07-03 20:46:40 +03:00 committed by Stafford Horne
parent d01e1f35fe
commit cdb75442fe
1 changed files with 1 additions and 1 deletions
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2
arch/openrisc/kernel/entry.S
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@ -264,7 +264,7 @@ EXCEPTION_ENTRY(_data_page_fault_handler)
l.srli r6,r6,26 // check opcode for write access
#endif
l.sfgeui r6,0x34 // check opcode for write access
l.sfgeui r6,0x33 // check opcode for write access
l.bnf 1f
l.sfleui r6,0x37
l.bnf 1f