Cleanup of the d_mmap_t interface.

- Get rid of the useless atop() / pmap_phys_address() detour.  The
  device mmap handlers must now give back the physical address
  without atop()'ing it.
- Don't borrow the physical address of the mapping in the returned
  int.  Now we properly pass a vm_offset_t * and expect it to be
  filled by the mmap handler when the mapping was successful.  The
  mmap handler must now return 0 when successful, any other value
  is considered as an error.  Previously, returning -1 was the only
  way to fail.  This change thus accidentally fixes some devices
  which were bogusly returning errno constants which would have been
  considered as addresses by the device pager.
- Garbage collect the poorly named pmap_phys_address() now that it's
  no longer used.
- Convert all the d_mmap_t consumers to the new API.

I'm still not sure wheter we need a __FreeBSD_version bump for this,
since and we didn't guarantee API/ABI stability until 5.1-RELEASE.

Discussed with:		alc, phk, jake
Reviewed by:		peter
Compile-tested on:	LINT (i386), GENERIC (alpha and sparc64)
Runtime-tested on:	i386

2 files changed, 3 insertions, 8 deletions

diff --git a/sys/ia64/ia64/mem.c b/sys/ia64/ia64/mem.c
index 152f9b4..146b684 100644
--- a/sys/ia64/ia64/mem.c
+++ b/sys/ia64/ia64/mem.c
@@ -221,7 +221,7 @@ kmemphys:
 * instead of going through read/write			*
 \*******************************************************/
 static int
-memmmap(dev_t dev, vm_offset_t offset, int prot)
+memmmap(dev_t dev, vm_offset_t offset, vm_offset_t *paddr, int prot)
 {
 	/*
 	 * /dev/mem is the only one that makes sense through this
@@ -237,7 +237,8 @@ memmmap(dev_t dev, vm_offset_t offset, int prot)
 	 */
 	if ((prot & ia64_pa_access(atop((vm_offset_t)offset))) != prot)
 		return (-1);
-	return (ia64_btop(IA64_PHYS_TO_RR7(offset)));
+	*paddr = IA64_PHYS_TO_RR7(offset);
+	return (0);
 }
 
 static int
diff --git a/sys/ia64/ia64/pmap.c b/sys/ia64/ia64/pmap.c
index 0be8b83..738fefc 100644
--- a/sys/ia64/ia64/pmap.c
+++ b/sys/ia64/ia64/pmap.c
@@ -2236,12 +2236,6 @@ pmap_page_protect(vm_page_t m, vm_prot_t prot)
 	}
 }
 
-vm_offset_t
-pmap_phys_address(int ppn)
-{
-	return (ia64_ptob(ppn));
-}
-
 /*
  *	pmap_ts_referenced:
  *