Author: kib
Date: Wed Aug 20 08:02:38 2014
New Revision: 270201
URL: http://svnweb.freebsd.org/changeset/base/270201
Log:
Add arch-specific macro SFBUF_PHYS_DMAP(), which should translate the
physical address of the page to direct map address, in case
SFBUF_OPTIONAL_DIRECT_MAP returns true. The case of PowerPC AIM
64bit, where the page physical address is identical to the direct map
address, is accidental.
Reviewed by: alc
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/powerpc/include/vmparam.h
head/sys/sys/sf_buf.h
Modified: head/sys/powerpc/include/vmparam.h
==============================================================================
--- head/sys/powerpc/include/vmparam.h Wed Aug 20 07:48:09 2014
(r270200)
+++ head/sys/powerpc/include/vmparam.h Wed Aug 20 08:02:38 2014
(r270201)
@@ -210,5 +210,6 @@ struct pmap_physseg {
#define SFBUF
#define SFBUF_NOMD
#define SFBUF_OPTIONAL_DIRECT_MAP hw_direct_map
+#define SFBUF_PHYS_DMAP(x) (x)
#endif /* _MACHINE_VMPARAM_H_ */
Modified: head/sys/sys/sf_buf.h
==============================================================================
--- head/sys/sys/sf_buf.h Wed Aug 20 07:48:09 2014 (r270200)
+++ head/sys/sys/sf_buf.h Wed Aug 20 08:02:38 2014 (r270201)
@@ -113,7 +113,7 @@ sf_buf_kva(struct sf_buf *sf)
{
#ifdef SFBUF_OPTIONAL_DIRECT_MAP
if (SFBUF_OPTIONAL_DIRECT_MAP)
- return (VM_PAGE_TO_PHYS((vm_page_t)sf));
+ return (SFBUF_PHYS_DMAP(VM_PAGE_TO_PHYS((vm_page_t)sf)));
#endif
return (sf->kva);
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