diff options
| author | Joakim Tjernlund <joakim.tjernlund@transmode.se> | 2009-11-20 00:21:07 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-12-09 17:10:36 +1100 |
| commit | 4a280a413c0c0da03936483384c9e5142966635e (patch) | |
| tree | 1f7856a0ac635f845194692c26c79caa5e8bf3ef | |
| parent | 0a2ab51ffb8dfdf51402dcfb446629648c96bc78 (diff) | |
powerpc/8xx: Add missing Guarded setting in DTLB Error.
only DTLB Miss did set this bit, DTLB Error needs too otherwise
the setting is lost when the page becomes dirty.
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/kernel/head_8xx.S | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index c00120d56f8..1a28ee8ca31 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -552,9 +552,16 @@ DARFixed:/* Return from dcbx instruction bug workaround, r10 holds value of DAR */ ori r11, r11, 1 /* Set valid bit in physical L2 page */ DO_8xx_CPU6(0x3b80, r3) - mtspr SPRN_MD_TWC, r11 /* Load pte table base address */ - mfspr r11, SPRN_MD_TWC /* ....and get the pte address */ - lwz r10, 0(r11) /* Get the pte */ + mtspr SPRN_MD_TWC, r11 /* Load pte table base address */ + mfspr r10, SPRN_MD_TWC /* ....and get the pte address */ + lwz r10, 0(r10) /* Get the pte */ + /* Insert the Guarded flag into the TWC from the Linux PTE. + * It is bit 27 of both the Linux PTE and the TWC + */ + rlwimi r11, r10, 0, 27, 27 + DO_8xx_CPU6(0x3b80, r3) + mtspr SPRN_MD_TWC, r11 + mfspr r11, SPRN_MD_TWC /* get the pte address again */ ori r10, r10, _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_HWWRITE stw r10, 0(r11) /* and update pte in table */ |