Author: nwhitehorn
Date: Wed Jan 14 02:18:29 2015
New Revision: 277157
URL: https://svnweb.freebsd.org/changeset/base/277157
Log:
Do not remap Open Firmware mappings covered by the direct map. It's
pointless and wastes resources.
MFC after: 1 week
Modified:
head/sys/powerpc/aim/mmu_oea64.c
Modified: head/sys/powerpc/aim/mmu_oea64.c
==============================================================================
--- head/sys/powerpc/aim/mmu_oea64.c Wed Jan 14 01:23:50 2015
(r277156)
+++ head/sys/powerpc/aim/mmu_oea64.c Wed Jan 14 02:18:29 2015
(r277157)
@@ -224,6 +224,8 @@ uma_zone_t moea64_mpvo_zone; /* zone for
#define BPVO_POOL_SIZE 327680
static struct pvo_entry *moea64_bpvo_pool;
static int moea64_bpvo_pool_index = 0;
+SYSCTL_INT(_machdep, OID_AUTO, moea64_allocated_bpvo_entries, CTLFLAG_RD,
+ &moea64_bpvo_pool_index, 0, "");
#define VSID_NBPW (sizeof(u_int32_t) * 8)
#ifdef __powerpc64__
@@ -534,6 +536,11 @@ moea64_add_ofw_mappings(mmu_t mmup, phan
DISABLE_TRANS(msr);
for (off = 0; off < translations[i].om_len; off += PAGE_SIZE) {
+ /* If this address is direct-mapped, skip remapping */
+ if (hw_direct_map && translations[i].om_va == pa_base &&
+ moea64_calc_wimg(pa_base + off, VM_MEMATTR_DEFAULT)
== LPTE_M)
+ continue;
+
if (moea64_pvo_find_va(kernel_pmap,
translations[i].om_va + off) != NULL)
continue;
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