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Eliminate track_modified_needed(), better known as pmap_track_modified()

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on other platforms.  We no longer need it because we do not create managed
mappings within the clean submap.

Pointed out by: alc
This commit is contained in:
Marcel Moolenaar 2008-04-27 21:04:54 +00:00
parent 39376f45e2
commit b66bd41daa
1 changed files with 8 additions and 37 deletions
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45
sys/powerpc/booke/pmap.c
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@ -379,20 +379,6 @@ static mmu_def_t booke_mmu = {
};
MMU_DEF(booke_mmu);
/*
* This routine defines the region(s) of memory that should
* not be tested for the modified bit.
*/
static __inline int
track_modified_needed(pmap_t pmap, vm_offset_t va)
{
if (pmap == kernel_pmap)
return ((va < kmi.clean_sva) || (va >= kmi.clean_eva));
else
return (1);
}
/* Return number of entries in TLB0. */
static __inline void
tlb0_get_tlbconf(void)
@ -780,10 +766,8 @@ pte_remove(mmu_t mmu, pmap_t pmap, vm_offset_t va, u_int8_t flags)
if (PTE_ISMANAGED(pte)) {
/* Handle modified pages. */
if (PTE_ISMODIFIED(pte)) {
if (track_modified_needed(pmap, va))
vm_page_dirty(m);
}
if (PTE_ISMODIFIED(pte))
vm_page_dirty(m);
/* Referenced pages. */
if (PTE_ISREFERENCED(pte))
@ -1487,10 +1471,8 @@ mmu_booke_enter_locked(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_page_t m,
pte->flags |= PTE_UW;
} else {
/* Handle modified pages, sense modify status. */
if (PTE_ISMODIFIED(pte)) {
if (track_modified_needed(pmap, va))
vm_page_dirty(m);
}
if (PTE_ISMODIFIED(pte))
vm_page_dirty(m);
}
/* If we're turning on execute permissions, flush the icache. */
@ -1809,10 +1791,8 @@ mmu_booke_protect(mmu_t mmu, pmap_t pmap, vm_offset_t sva, vm_offset_t eva,
m = PHYS_TO_VM_PAGE(PTE_PA(pte));
/* Handle modified pages. */
if (PTE_ISMODIFIED(pte)) {
if (track_modified_needed(pmap, va))
vm_page_dirty(m);
}
if (PTE_ISMODIFIED(pte))
vm_page_dirty(m);
/* Referenced pages. */
if (PTE_ISREFERENCED(pte))
@ -1850,11 +1830,8 @@ mmu_booke_remove_write(mmu_t mmu, vm_page_t m)
m = PHYS_TO_VM_PAGE(PTE_PA(pte));
/* Handle modified pages. */
if (PTE_ISMODIFIED(pte)) {
if (track_modified_needed(pv->pv_pmap,
pv->pv_va))
vm_page_dirty(m);
}
if (PTE_ISMODIFIED(pte))
vm_page_dirty(m);
/* Referenced pages. */
if (PTE_ISREFERENCED(pte))
@ -2055,9 +2032,6 @@ mmu_booke_is_modified(mmu_t mmu, vm_page_t m)
if (!PTE_ISVALID(pte))
goto make_sure_to_unlock;
if (!track_modified_needed(pv->pv_pmap, pv->pv_va))
goto make_sure_to_unlock;
if (PTE_ISMODIFIED(pte)) {
PMAP_UNLOCK(pv->pv_pmap);
return (TRUE);
@ -2138,9 +2112,6 @@ mmu_booke_ts_referenced(mmu_t mmu, vm_page_t m)
if (!PTE_ISVALID(pte))
goto make_sure_to_unlock;
if (!track_modified_needed(pv->pv_pmap, pv->pv_va))
goto make_sure_to_unlock;
if (PTE_ISREFERENCED(pte)) {
pte->flags &= ~PTE_REFERENCED;
tlb0_flush_entry(pv->pv_pmap, pv->pv_va);