Author: ian
Date: Wed Dec 20 22:17:27 2017
New Revision: 327049
URL: https://svnweb.freebsd.org/changeset/base/327049
Log:
Allow pmap_kremove() to remove 1MB section mappings as well as 4K pages.
This will allow it to undo temporary device mappings such as those made
with pmap_preboot_map_attr().
Reviewed by: cognet
Modified:
head/sys/arm/arm/pmap-v6.c
Modified: head/sys/arm/arm/pmap-v6.c
==============================================================================
--- head/sys/arm/arm/pmap-v6.c Wed Dec 20 20:46:12 2017 (r327048)
+++ head/sys/arm/arm/pmap-v6.c Wed Dec 20 22:17:27 2017 (r327049)
@@ -1310,10 +1310,16 @@ pmap_kenter(vm_offset_t va, vm_paddr_t pa)
PMAP_INLINE void
pmap_kremove(vm_offset_t va)
{
+ pt1_entry_t *pte1p;
pt2_entry_t *pte2p;
- pte2p = pt2map_entry(va);
- pte2_clear(pte2p);
+ pte1p = kern_pte1(va);
+ if (pte1_is_section(pte1_load(pte1p))) {
+ pte1_clear(pte1p);
+ } else {
+ pte2p = pt2map_entry(va);
+ pte2_clear(pte2p);
+ }
}
/*
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