On Tue, 2014-12-16 at 16:03 +0100, Christophe Leroy wrote: > L1 base address is now aligned so we can insert L1 index into r11 directly and > then preserve r10 > > Signed-off-by: Christophe Leroy <christophe.le...@c-s.fr>
Acked-by: Joakim Tjernlund <joakim.tjernl...@transmode.se> > > --- > arch/powerpc/kernel/head_8xx.S | 34 +++++++++++++++------------------- > 1 file changed, 15 insertions(+), 19 deletions(-) > > diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S > index 2c329f1..ae05f28 100644 > --- a/arch/powerpc/kernel/head_8xx.S > +++ b/arch/powerpc/kernel/head_8xx.S > @@ -326,16 +326,15 @@ InstructionTLBMiss: > ori r11, r11, (swapper_pg_dir-PAGE_OFFSET)@l > 3: > #endif > - /* Extract level 1 index */ > - rlwinm r10, r10, 32 - ((PAGE_SHIFT - 2) << 1), (PAGE_SHIFT - 2) << > 1, 29 > - lwzx r11, r10, r11/* Get the level 1 entry */ > - rlwinm r10, r11,0,0,19/* Extract page descriptor page address */ > + /* Insert level 1 index */ > + rlwimi r11, r10, 32 - ((PAGE_SHIFT - 2) << 1), (PAGE_SHIFT - 2) << > 1, 29 > + lwz r11, 0(r11)/* Get the level 1 entry */ > > /* Load the MI_TWC with the attributes for this "segment." */ > MTSPR_CPU6(SPRN_MI_TWC, r11, r3)/* Set segment attributes */ > - mfspr r11, SPRN_SRR0/* Get effective address of fault */ > + rlwinm r11, r11,0,0,19/* Extract page descriptor page address */ > /* Extract level 2 index */ > - rlwinm r11, r11, 32 - (PAGE_SHIFT - 2), 32 - PAGE_SHIFT, 29 > + rlwinm r10, r10, 32 - (PAGE_SHIFT - 2), 32 - PAGE_SHIFT, 29 > lwzx r10, r10, r11/* Get the pte */ > > #ifdef CONFIG_SWAP > @@ -380,13 +379,12 @@ DataStoreTLBMiss: > lis r11, (swapper_pg_dir-PAGE_OFFSET)@h > ori r11, r11, (swapper_pg_dir-PAGE_OFFSET)@l > 3: > - /* Extract level 1 index */ > - rlwinm r10, r10, 32 - ((PAGE_SHIFT - 2) << 1), (PAGE_SHIFT - 2) << > 1, 29 > - lwzx r11, r10, r11/* Get the level 1 entry */ > + /* Insert level 1 index */ > + rlwimi r11, r10, 32 - ((PAGE_SHIFT - 2) << 1), (PAGE_SHIFT - 2) << > 1, 29 > + lwz r11, 0(r11)/* Get the level 1 entry */ > > /* We have a pte table, so load fetch the pte from the table. > */ > - mfspr r10, SPRN_MD_EPN/* Get address of fault */ > /* Extract level 2 index */ > rlwinm r10, r10, 32 - (PAGE_SHIFT - 2), 32 - PAGE_SHIFT, 29 > rlwimi r10, r11, 0, 0, 32 - PAGE_SHIFT - 1/* Add level 2 base */ > @@ -515,16 +513,14 @@ FixupDAR:/* Entry point for dcbx workaround. */ > beq- 3f /* Branch if user space */ > lis r11, (swapper_pg_dir-PAGE_OFFSET)@h > ori r11, r11, (swapper_pg_dir-PAGE_OFFSET)@l > - /* Extract level 1 index */ > -3: rlwinm r10, r10, 32 - ((PAGE_SHIFT - 2) << 1), (PAGE_SHIFT - 2) << > 1, 29 > - lwzx r11, r10, r11/* Get the level 1 entry */ > - rlwinm r10, r11,0,0,19/* Extract page descriptor page address */ > - mfspr r11, SPRN_SRR0/* Get effective address of fault */ > - /* Extract level 2 index */ > - rlwinm r11, r11, 32 - (PAGE_SHIFT - 2), 32 - PAGE_SHIFT, 29 > - lwzx r11, r10, r11/* Get the pte */ > + /* Insert level 1 index */ > +3: rlwimi r11, r10, 32 - ((PAGE_SHIFT - 2) << 1), (PAGE_SHIFT - 2) << > 1, 29 > + lwz r11, 0(r11)/* Get the level 1 entry */ > + rlwinm r11, r11,0,0,19/* Extract page descriptor page address */ > + /* Insert level 2 index */ > + rlwimi r11, r10, 32 - (PAGE_SHIFT - 2), 32 - PAGE_SHIFT, 29 > + lwz r11, 0(r11)/* Get the pte */ > /* concat physical page address(r11) and page offset(r10) */ > - mfspr r10, SPRN_SRR0 > rlwimi r11, r10, 0, 32 - PAGE_SHIFT, 31 > lwz r11,0(r11) > /* Check if it really is a dcbx instruction. */ _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
