Author: jhibbits
Date: Thu Aug 8 03:18:35 2019
New Revision: 350738
URL: https://svnweb.freebsd.org/changeset/base/350738
Log:
powerpc/pmap: Minor optimizations to 64-bit booke pmap
Don't recalculate the VM page of the page table pages, just pass them down
to free. Also, use the pmap's page zero function instead of bzero().
Modified:
head/sys/powerpc/booke/pmap.c
Modified: head/sys/powerpc/booke/pmap.c
==============================================================================
--- head/sys/powerpc/booke/pmap.c Thu Aug 8 03:16:32 2019
(r350737)
+++ head/sys/powerpc/booke/pmap.c Thu Aug 8 03:18:35 2019
(r350738)
@@ -264,7 +264,7 @@ static int pv_entry_count = 0, pv_entry_max = 0, pv_en
#ifdef __powerpc64__
static pte_t *ptbl_alloc(mmu_t, pmap_t, pte_t **,
unsigned int, boolean_t);
-static void ptbl_free(mmu_t, pmap_t, pte_t **, unsigned int);
+static void ptbl_free(mmu_t, pmap_t, pte_t **, unsigned int, vm_page_t);
static void ptbl_hold(mmu_t, pmap_t, pte_t **, unsigned int);
static int ptbl_unhold(mmu_t, pmap_t, vm_offset_t);
#else
@@ -615,19 +615,16 @@ pdir_alloc(mmu_t mmu, pmap_t pmap, unsigned int pp2d_i
/* Zero whole ptbl. */
pdir = (pte_t **)PHYS_TO_DMAP(VM_PAGE_TO_PHYS(m));
- bzero(pdir, PAGE_SIZE);
+ mmu_booke_zero_page(mmu, m);
return (pdir);
}
/* Free pdir pages and invalidate pdir entry. */
static void
-pdir_free(mmu_t mmu, pmap_t pmap, unsigned int pp2d_idx)
+pdir_free(mmu_t mmu, pmap_t pmap, unsigned int pp2d_idx, vm_page_t m)
{
pte_t **pdir;
- vm_paddr_t pa;
- vm_offset_t va;
- vm_page_t m;
pdir = pmap->pm_pp2d[pp2d_idx];
@@ -635,9 +632,6 @@ pdir_free(mmu_t mmu, pmap_t pmap, unsigned int pp2d_id
pmap->pm_pp2d[pp2d_idx] = NULL;
- va = (vm_offset_t) pdir;
- pa = DMAP_TO_PHYS(va);
- m = PHYS_TO_VM_PAGE(pa);
vm_page_free_zero(m);
}
@@ -667,7 +661,7 @@ pdir_unhold(mmu_t mmu, pmap_t pmap, u_int pp2d_idx)
* Free pdir page if there are no dir entries in this pdir.
*/
if (vm_page_unwire_noq(m)) {
- pdir_free(mmu, pmap, pp2d_idx);
+ pdir_free(mmu, pmap, pp2d_idx, m);
return (1);
}
return (0);
@@ -717,19 +711,16 @@ ptbl_alloc(mmu_t mmu, pmap_t pmap, pte_t ** pdir, unsi
/* Zero whole ptbl. */
ptbl = (pte_t *)PHYS_TO_DMAP(VM_PAGE_TO_PHYS(m));
- bzero(ptbl, PAGE_SIZE);
+ mmu_booke_zero_page(mmu, m);
return (ptbl);
}
/* Free ptbl pages and invalidate pdir entry. */
static void
-ptbl_free(mmu_t mmu, pmap_t pmap, pte_t ** pdir, unsigned int pdir_idx)
+ptbl_free(mmu_t mmu, pmap_t pmap, pte_t ** pdir, unsigned int pdir_idx,
vm_page_t m)
{
pte_t *ptbl;
- vm_paddr_t pa;
- vm_offset_t va;
- vm_page_t m;
ptbl = pdir[pdir_idx];
@@ -737,9 +728,6 @@ ptbl_free(mmu_t mmu, pmap_t pmap, pte_t ** pdir, unsig
pdir[pdir_idx] = NULL;
- va = (vm_offset_t) ptbl;
- pa = DMAP_TO_PHYS(va);
- m = PHYS_TO_VM_PAGE(pa);
vm_page_free_zero(m);
}
@@ -776,7 +764,7 @@ ptbl_unhold(mmu_t mmu, pmap_t pmap, vm_offset_t va)
* last page.
*/
if (vm_page_unwire_noq(m)) {
- ptbl_free(mmu, pmap, pdir, pdir_idx);
+ ptbl_free(mmu, pmap, pdir, pdir_idx, m);
pdir_unhold(mmu, pmap, pp2d_idx);
return (1);
}
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