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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2018-01-12 15:45:33 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-01-16 15:47:15 +0300 |
| commit | 4f94b2c7462d9720b2afa7e8e8d4c19446bb31ce (patch) | |
| tree | 1ae3d8ccd4182022f85041802d199b1294699639 /arch/powerpc/mm/8xx_mmu.c | |
| parent | de0f93873937e999fadaba011d368bc042af37b2 (diff) | |
| download | linux-4f94b2c7462d9720b2afa7e8e8d4c19446bb31ce.tar.xz | |
powerpc/8xx: Use L1 entry APG to handle _PAGE_ACCESSED for CONFIG_SWAP
When CONFIG_SWAP is set, the TLB miss handlers have to also take
into account _PAGE_ACCESSED flag. At the moment it is done by
anding _PAGE_ACCESSED into _PAGE_PRESENT using 3 instructions.
This patch uses APG for handling _PAGE_ACCESSED, allowing to
just copy _PAGE_ACCESSED bit into APG field, hence reducing the
action to a single instruction.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm/8xx_mmu.c')
| -rw-r--r-- | arch/powerpc/mm/8xx_mmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/mm/8xx_mmu.c b/arch/powerpc/mm/8xx_mmu.c index c2d9a6d709c3..849f50cd62f2 100644 --- a/arch/powerpc/mm/8xx_mmu.c +++ b/arch/powerpc/mm/8xx_mmu.c @@ -79,7 +79,7 @@ void __init MMU_init_hw(void) for (; i < 32 && mem >= LARGE_PAGE_SIZE_8M; i++) { mtspr(SPRN_MD_CTR, ctr | (i << 8)); mtspr(SPRN_MD_EPN, (unsigned long)__va(addr) | MD_EVALID); - mtspr(SPRN_MD_TWC, MD_PS8MEG | MD_SVALID); + mtspr(SPRN_MD_TWC, MD_PS8MEG | MD_SVALID | M_APG2); mtspr(SPRN_MD_RPN, addr | flags | _PAGE_PRESENT); addr += LARGE_PAGE_SIZE_8M; mem -= LARGE_PAGE_SIZE_8M; |