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| author | Matt Fleming <matt@console-pimps.org> | 2009-11-19 21:11:05 (GMT) |
|---|---|---|
| committer | Matt Fleming <matt@console-pimps.org> | 2010-01-16 14:29:06 (GMT) |
| commit | 24ef7fc4dcc57afa0c33166c25bfe7676ffd4296 (patch) | |
| tree | d6fc5129f2dbb0534521f5a5111e2bed3cd0f0a7 /arch/sh/include/asm/tlb.h | |
| parent | 8eda55142080f0373b1f0268fe6d6807f193e713 (diff) | |
| download | linux-24ef7fc4dcc57afa0c33166c25bfe7676ffd4296.tar.xz | |
sh: Acquire some more page flags for SH-5.
We need some more page flags to hook up _PAGE_WIRED (and eventually
other things). So use the unused PTE bits above the PPN field as no
implementations use these for anything currently.
Now that we have _PAGE_WIRED let's provide the SH-5 functions for wiring
up TLB entries.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Diffstat (limited to 'arch/sh/include/asm/tlb.h')
| -rw-r--r-- | arch/sh/include/asm/tlb.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/sh/include/asm/tlb.h b/arch/sh/include/asm/tlb.h index 3ed2f7a..dfc8fcd 100644 --- a/arch/sh/include/asm/tlb.h +++ b/arch/sh/include/asm/tlb.h @@ -11,6 +11,7 @@ #ifdef CONFIG_MMU #include <asm/pgalloc.h> #include <asm/tlbflush.h> +#include <asm/mmu_context.h> /* * TLB handling. This allows us to remove pages from the page @@ -100,6 +101,46 @@ tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vma) #ifdef CONFIG_CPU_SH4 extern void tlb_wire_entry(struct vm_area_struct *, unsigned long, pte_t); extern void tlb_unwire_entry(void); +#elif defined(CONFIG_SUPERH64) +static int dtlb_entry; +static unsigned long long dtlb_entries[64]; + +static inline void tlb_wire_entry(struct vm_area_struct *vma, + unsigned long addr, pte_t pte) +{ + unsigned long long entry; + unsigned long paddr, flags; + + BUG_ON(dtlb_entry == 64); + + local_irq_save(flags); + + entry = sh64_get_wired_dtlb_entry(); + dtlb_entries[dtlb_entry++] = entry; + + paddr = pte_val(pte) & _PAGE_FLAGS_HARDWARE_MASK; + paddr &= ~PAGE_MASK; + + sh64_setup_tlb_slot(entry, addr, get_asid(), paddr); + + local_irq_restore(flags); +} + +static inline void tlb_unwire_entry(void) +{ + unsigned long long entry; + unsigned long flags; + + BUG_ON(!dtlb_entry); + + local_irq_save(flags); + entry = dtlb_entries[dtlb_entry--]; + + sh64_teardown_tlb_slot(entry); + sh64_put_wired_dtlb_entry(entry); + + local_irq_restore(flags); +} #else static inline void tlb_wire_entry(struct vm_area_struct *vma , unsigned long addr, pte_t pte) |