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| author | Akira Takeuchi <takeuchi.akr@jp.panasonic.com> | 2010-10-27 17:28:48 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2010-10-27 17:28:48 +0100 |
| commit | 8f19e3daf3fffee9e18a8812067a6a4b538ae6c8 (patch) | |
| tree | 854a50f4fae7f35688171cb20874cfddabda99a4 /arch/mn10300/kernel | |
| parent | 633171861a3120af011bb1ee8dd40069951dfeac (diff) | |
| download | op-kernel-dev-8f19e3daf3fffee9e18a8812067a6a4b538ae6c8.zip op-kernel-dev-8f19e3daf3fffee9e18a8812067a6a4b538ae6c8.tar.gz | |
MN10300: AM34 erratum requires MMUCTR read and write on exception entry
An AM34 erratum requires MMUCTR read and write on entry to certain exceptions,
prior to EPSW.NMID being cleared to allow NMIs to happen.
Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>
Signed-off-by: Kiyoshi Owada <owada.kiyoshi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'arch/mn10300/kernel')
| -rw-r--r-- | arch/mn10300/kernel/entry.S | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/mn10300/kernel/entry.S b/arch/mn10300/kernel/entry.S index b82ce7b..355f681 100644 --- a/arch/mn10300/kernel/entry.S +++ b/arch/mn10300/kernel/entry.S @@ -251,6 +251,10 @@ double_fault_loop: ENTRY(raw_bus_error) add -4,sp mov d0,(sp) +#if defined(CONFIG_ERRATUM_NEED_TO_RELOAD_MMUCTR) + mov (MMUCTR),d0 + mov d0,(MMUCTR) +#endif mov (BCBERR),d0 # what btst BCBERR_BEMR_DMA,d0 # see if it was an external bus error beq __common_exception_aux # it wasn't @@ -282,6 +286,10 @@ ENTRY(nmi_handler) ENTRY(__common_exception) add -4,sp mov d0,(sp) +#if defined(CONFIG_ERRATUM_NEED_TO_RELOAD_MMUCTR) + mov (MMUCTR),d0 + mov d0,(MMUCTR) +#endif __common_exception_aux: mov (TBR),d0 |
