Author: jhibbits
Date: Sun Aug 25 20:08:48 2019
New Revision: 351486
URL: https://svnweb.freebsd.org/changeset/base/351486
Log:
powerpc/booke: Use the DMAP if possible in pmap_map()
This avoids unnecessary TLB usage for statically mapped regions, such as
vm_page_array.
Modified:
head/sys/powerpc/booke/pmap.c
Modified: head/sys/powerpc/booke/pmap.c
==============================================================================
--- head/sys/powerpc/booke/pmap.c Sun Aug 25 19:39:31 2019
(r351485)
+++ head/sys/powerpc/booke/pmap.c Sun Aug 25 20:08:48 2019
(r351486)
@@ -2546,8 +2546,11 @@ mmu_booke_map(mmu_t mmu, vm_offset_t *virt, vm_paddr_t
vm_offset_t sva = *virt;
vm_offset_t va = sva;
- //debugf("mmu_booke_map: s (sva = 0x%08x pa_start = 0x%08x pa_end =
0x%08x)\n",
- // sva, pa_start, pa_end);
+#ifdef __powerpc64__
+ /* XXX: Handle memory not starting at 0x0. */
+ if (pa_end < ctob(Maxmem))
+ return (PHYS_TO_DMAP(pa_start));
+#endif
while (pa_start < pa_end) {
mmu_booke_kenter(mmu, va, pa_start);
@@ -2556,7 +2559,6 @@ mmu_booke_map(mmu_t mmu, vm_offset_t *virt, vm_paddr_t
}
*virt = va;
- //debugf("mmu_booke_map: e (va = 0x%08x)\n", va);
return (sva);
}
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