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| author | Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> | 2014-07-03 20:46:40 +0300 |
|---|---|---|
| committer | Stafford Horne <shorne@gmail.com> | 2016-12-12 23:10:26 +0900 |
| commit | cdb75442fedff8cc3ddedbe6e41d00b471634e17 (patch) | |
| tree | 5806594b87c978f1aacb7a69ce0e37c4c77aedc5 /arch/openrisc | |
| parent | d01e1f35fee54fd7131e161956e609dfd47c1056 (diff) | |
| download | linux-cdb75442fedff8cc3ddedbe6e41d00b471634e17.tar.gz | |
openrisc: include l.swa in check for write data pagefault
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>
Diffstat (limited to 'arch/openrisc')
| -rw-r--r-- | arch/openrisc/kernel/entry.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/openrisc/kernel/entry.S b/arch/openrisc/kernel/entry.S index 572d223dbd26..aac0bde3330c 100644 --- a/arch/openrisc/kernel/entry.S +++ b/arch/openrisc/kernel/entry.S @@ -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 |