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| author | Becky Bruce <bgill@freescale.com> | 2007-02-12 17:43:46 -0600 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2007-02-12 21:32:38 -0600 |
| commit | 8ce0a7df6e6117d8814e976d4b7ce6a6b2c9cf93 (patch) | |
| tree | 14fb1bec568491b3f1fbc37f2ef6df986617e9bc /arch/ppc | |
| parent | edacf6bb7e7e1b75f2937966a50119439ff78ccb (diff) | |
| download | op-kernel-dev-8ce0a7df6e6117d8814e976d4b7ce6a6b2c9cf93.zip op-kernel-dev-8ce0a7df6e6117d8814e976d4b7ce6a6b2c9cf93.tar.gz | |
[POWERPC] 85xx: Don't write reserved values to MAS1[TSIZE]
Some of the current tlbwe instructions early on in head_fsl_booke.S take
advantage of unarchitected behavior that allows the writing of reserved
values to the TSIZE field. This patch corrects that, as well as an error
where an uninitialized (by linux) value was written into a MAS register and
used for a tlbwe.
Correct this for both arch/ppc and arch/powerpc.
Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/ppc')
| -rw-r--r-- | arch/ppc/kernel/head_fsl_booke.S | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/ppc/kernel/head_fsl_booke.S b/arch/ppc/kernel/head_fsl_booke.S index 66877bd..54f40d9 100644 --- a/arch/ppc/kernel/head_fsl_booke.S +++ b/arch/ppc/kernel/head_fsl_booke.S @@ -206,7 +206,8 @@ skpinv: addi r6,r6,1 /* Increment */ rlwimi r7,r3,16,4,15 /* Setup MAS0 = TLBSEL | ESEL(r3) */ mtspr SPRN_MAS0,r7 tlbre - li r6,0 + mfspr r6,SPRN_MAS1 + rlwinm r6,r6,0,2,0 /* clear IPROT */ mtspr SPRN_MAS1,r6 tlbwe /* Invalidate TLB1 */ @@ -248,6 +249,8 @@ skpinv: addi r6,r6,1 /* Increment */ rlwimi r7,r5,16,4,15 /* Setup MAS0 = TLBSEL | ESEL(r5) */ mtspr SPRN_MAS0,r7 tlbre + mfspr r8,SPRN_MAS1 + rlwinm r8,r8,0,2,0 /* clear IPROT */ mtspr SPRN_MAS1,r8 tlbwe /* Invalidate TLB1 */ |
