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Date: Fri, 8 Aug 2014 09:03:44 +0200 (CEST) From: Christophe Leroy <christophe.leroy@....fr> To: Benjamin Herrenschmidt <benh@...nel.crashing.org>, Paul Mackerras <paulus@...ba.org> CC: linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, Joakim Tjernlund <joakim.tjernlund@...nsmode.se>, scottwood@...escale.com Subject: [PATCH 14/20] powerpc/8xx: Use PAGE size related consts For PAGE size related operations, use PAGE size consts in order to be able to use different page size in the futur. Signed-off-by: Christophe Leroy <christophe.leroy@....fr> --- arch/powerpc/kernel/head_8xx.S | 29 ++++++++++++++++++----------- 1 files changed, 18 insertions(+), 11 deletions(-) diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 5671c76..43fdb5c 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -292,9 +292,9 @@ InstructionTLBMiss: mtspr SPRN_SPRG_SCRATCH2, r10 mfspr r10, SPRN_SRR0 /* Get effective address of fault */ #ifdef CONFIG_8xx_CPU15 - addi r11, r10, 0x1000 + addi r11, r10, PAGE_SIZE tlbie r11 - addi r11, r10, -0x1000 + addi r11, r10, -PAGE_SIZE tlbie r11 #endif @@ -312,7 +312,8 @@ InstructionTLBMiss: lis r11, (swapper_pg_dir-PAGE_OFFSET)@h 3: #endif - rlwinm r10, r10, 12, 20, 29 /* Extract level 1 index */ + /* 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 */ beq 2f /* If zero, don't try to find a pte */ @@ -324,7 +325,8 @@ InstructionTLBMiss: DO_8xx_CPU6(0x2b80, r3) mtspr SPRN_MI_TWC, r11 /* Set segment attributes */ mfspr r11, SPRN_SRR0 /* Get effective address of fault */ - rlwinm r11, r11, 22, 20, 29 /* Extract level 2 index */ + /* Extract level 2 index */ + rlwinm r11, r11, 32 - (PAGE_SHIFT - 2), 32 - PAGE_SHIFT, 29 lwzx r10, r10, r11 /* Get the pte */ #ifdef CONFIG_SWAP @@ -383,7 +385,8 @@ DataStoreTLBMiss: beq 3f lis r11, (swapper_pg_dir-PAGE_OFFSET)@h 3: - rlwinm r10, r10, 12, 20, 29 /* Extract level 1 index */ + /* 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 */ beq 2f /* If zero, don't try to find a pte */ @@ -392,7 +395,8 @@ DataStoreTLBMiss: */ mtcr r11 mfspr r11, SPRN_MD_EPN /* Get address of fault */ - rlwinm r11, r11, 22, 20, 29 /* Extract level 2 index */ + /* Extract level 2 index */ + rlwinm r11, r11, 32 - (PAGE_SHIFT - 2), 32 - PAGE_SHIFT, 29 lwzx r10, r10, r11 /* Get the pte */ mfcr r11 @@ -523,18 +527,20 @@ FixupDAR:/* Entry point for dcbx workaround. */ mfspr r11, SPRN_M_TW /* Get level 1 table base address */ beq- 3f /* Branch if user space */ lis r11, (swapper_pg_dir-PAGE_OFFSET)@h -3: rlwinm r10, r10, 12, 20, 29 /* Extract level 1 index */ + /* 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 */ - rlwinm r11, r11, 22, 20, 29 /* Extract level 2 index */ + /* Extract level 2 index */ + rlwinm r11, r11, 32 - (PAGE_SHIFT - 2), 32 - PAGE_SHIFT, 29 lwzx r11, r10, r11 /* Get the pte */ #ifdef CONFIG_8xx_CPU6 lwz r3, 8(r0) /* restore r3 from memory */ #endif /* concat physical page address(r11) and page offset(r10) */ mfspr r10, SPRN_SRR0 - rlwimi r11, r10, 0, 20, 31 + rlwimi r11, r10, 0, 32 - PAGE_SHIFT, 31 lwz r11,0(r11) /* Check if it really is a dcbx instruction. */ /* dcbt and dcbtst does not generate DTLB Misses/Errors, @@ -911,11 +917,12 @@ sdata: .globl swapper_pg_dir .align 16 swapper_pg_dir: - .space 4096 + .space PGD_TABLE_SIZE .globl empty_zero_page + .align PAGE_SHIFT empty_zero_page: - .space 4096 + .space PAGE_SIZE /* Room for two PTE table poiners, usually the kernel and current user * pointer to their respective root page table (pgdir). -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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