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| author | Akira Takeuchi <takeuchi.akr@jp.panasonic.com> | 2010-10-27 17:28:49 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2010-10-27 17:28:49 +0100 |
| commit | a9bc60ebfd5766ce5f6095d0fed3d9978990122f (patch) | |
| tree | d6044bbb56bbb06fb6f13fab9f079a20938d0960 /arch/mn10300/mm | |
| parent | 492e675116003b99dfcf0fa70084027e86bc0161 (diff) | |
| download | op-kernel-dev-a9bc60ebfd5766ce5f6095d0fed3d9978990122f.zip op-kernel-dev-a9bc60ebfd5766ce5f6095d0fed3d9978990122f.tar.gz | |
MN10300: Make the use of PIDR to mark TLB entries controllable
Make controllable the use of the PIDR register to mark TLB entries as belonging
to particular processes.
Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>
Signed-off-by: Kiyoshi Owada <owada.kiyoshi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'arch/mn10300/mm')
| -rw-r--r-- | arch/mn10300/mm/mmu-context.c | 41 |
1 files changed, 11 insertions, 30 deletions
diff --git a/arch/mn10300/mm/mmu-context.c b/arch/mn10300/mm/mmu-context.c index 3d83966..a4f7d3d 100644 --- a/arch/mn10300/mm/mmu-context.c +++ b/arch/mn10300/mm/mmu-context.c @@ -13,40 +13,15 @@ #include <asm/mmu_context.h> #include <asm/tlbflush.h> +#ifdef CONFIG_MN10300_TLB_USE_PIDR /* * list of the MMU contexts last allocated on each CPU */ unsigned long mmu_context_cache[NR_CPUS] = { - [0 ... NR_CPUS - 1] = MMU_CONTEXT_FIRST_VERSION * 2 - 1, + [0 ... NR_CPUS - 1] = + MMU_CONTEXT_FIRST_VERSION * 2 - (1 - MMU_CONTEXT_TLBPID_LOCK_NR), }; - -/* - * flush the specified TLB entry - */ -void local_flush_tlb_page(struct mm_struct *mm, unsigned long addr) -{ - unsigned long pteu, cnx, flags; - - addr &= PAGE_MASK; - - /* make sure the context doesn't migrate and defend against - * interference from vmalloc'd regions */ - local_irq_save(flags); - - cnx = mm_context(mm); - - if (cnx != MMU_NO_CONTEXT) { - pteu = addr | (cnx & 0x000000ffUL); - IPTEU = pteu; - DPTEU = pteu; - if (IPTEL & xPTEL_V) - IPTEL = 0; - if (DPTEL & xPTEL_V) - DPTEL = 0; - } - - local_irq_restore(flags); -} +#endif /* CONFIG_MN10300_TLB_USE_PIDR */ /* * preemptively set a TLB entry @@ -63,10 +38,16 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr, pte_t *pte * interference from vmalloc'd regions */ local_irq_save(flags); + cnx = ~MMU_NO_CONTEXT; +#ifdef CONFIG_MN10300_TLB_USE_PIDR cnx = mm_context(vma->vm_mm); +#endif if (cnx != MMU_NO_CONTEXT) { - pteu = addr | (cnx & 0x000000ffUL); + pteu = addr; +#ifdef CONFIG_MN10300_TLB_USE_PIDR + pteu |= cnx & MMU_CONTEXT_TLBPID_MASK; +#endif if (!(pte_val(pte) & _PAGE_NX)) { IPTEU = pteu; if (IPTEL & xPTEL_V) |
