Author: nwhitehorn
Date: Thu Feb 25 03:49:17 2010
New Revision: 204296
URL: http://svn.freebsd.org/changeset/base/204296
Log:
Provide an implementation of pmap_dev_direct_mapped() on OEA64. This is
required in order to be able to mmap the running kernel, which is turn
required to avoid fstat returning gibberish.
Modified:
head/sys/powerpc/aim/mmu_oea64.c
Modified: head/sys/powerpc/aim/mmu_oea64.c
==============================================================================
--- head/sys/powerpc/aim/mmu_oea64.c Thu Feb 25 00:46:51 2010
(r204295)
+++ head/sys/powerpc/aim/mmu_oea64.c Thu Feb 25 03:49:17 2010
(r204296)
@@ -2410,7 +2410,22 @@ moea64_clear_bit(vm_page_t m, u_int64_t
boolean_t
moea64_dev_direct_mapped(mmu_t mmu, vm_offset_t pa, vm_size_t size)
{
- return (EFAULT);
+ struct pvo_entry *pvo;
+ vm_offset_t ppa;
+ int error = 0;
+
+ PMAP_LOCK(kernel_pmap);
+ for (ppa = pa & ~ADDR_POFF; ppa < pa + size; ppa += PAGE_SIZE) {
+ pvo = moea64_pvo_find_va(kernel_pmap, ppa, NULL);
+ if (pvo == NULL ||
+ (pvo->pvo_pte.lpte.pte_lo & LPTE_RPGN) != ppa) {
+ error = EFAULT;
+ break;
+ }
+ }
+ PMAP_UNLOCK(kernel_pmap);
+
+ return (error);
}
/*
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