svn commit: r250850 - head/sys/amd64/amd64

[Konstantin Belousov]

Author: kib
Date: Tue May 21 11:07:12 2013
New Revision: 250850
URL: http://svnweb.freebsd.org/changeset/base/250850

Log:
  Add amd64-specific ddb command 'show phys2dmap', which calculates the
  address in the direct map corresponding to the given physical address.
  
  Reviewed by:	jhb
  Sponsored by:	The FreeBSD Foundation
  MFC after:	1 week

Modified:
  head/sys/amd64/amd64/pmap.c

Modified: head/sys/amd64/amd64/pmap.c
==============================================================================
--- head/sys/amd64/amd64/pmap.c	Tue May 21 11:04:00 2013	(r250849)
+++ head/sys/amd64/amd64/pmap.c	Tue May 21 11:07:12 2013	(r250850)
@@ -5535,4 +5535,16 @@ DB_SHOW_COMMAND(pte, pmap_print_pte)
 	pte = pmap_pde_to_pte(pde, va);
 	db_printf(" pte %#016lx\n", *pte);
 }
+
+DB_SHOW_COMMAND(phys2dmap, pmap_phys2dmap)
+{
+	vm_paddr_t a;
+
+	if (have_addr) {
+		a = (vm_paddr_t)addr;
+		db_printf("0x%jx\n", (uintmax_t)PHYS_TO_DMAP(a));
+	} else {
+		db_printf("show phys2dmap addr\n");
+	}
+}
 #endif