[Midnightbsd-cvs] src [8493] trunk/sys/amd64/amd64/pmap.c: add show pte

[laffer1 at midnightbsd.org]

Revision: 8493
          http://svnweb.midnightbsd.org/src/?rev=8493
Author:   laffer1
Date:     2016-09-18 18:38:05 -0400 (Sun, 18 Sep 2016)
Log Message:
-----------
add show pte

Modified Paths:
--------------
    trunk/sys/amd64/amd64/pmap.c

Modified: trunk/sys/amd64/amd64/pmap.c
===================================================================
--- trunk/sys/amd64/amd64/pmap.c	2016-09-18 22:37:50 UTC (rev 8492)
+++ trunk/sys/amd64/amd64/pmap.c	2016-09-18 22:38:05 UTC (rev 8493)
@@ -5462,3 +5462,46 @@
 	else
 		*addr = ((*addr + PDRMASK) & ~PDRMASK) + superpage_offset;
 }
+
+#include "opt_ddb.h"
+#ifdef DDB
+#include <ddb/ddb.h>
+
+DB_SHOW_COMMAND(pte, pmap_print_pte)
+{
+	pmap_t pmap;
+	pml4_entry_t *pml4;
+	pdp_entry_t *pdp;
+	pd_entry_t *pde;
+	pt_entry_t *pte;
+	vm_offset_t va;
+
+	if (have_addr) {
+		va = (vm_offset_t)addr;
+		pmap = PCPU_GET(curpmap); /* XXX */
+	} else {
+		db_printf("show pte addr\n");
+		return;
+	}
+	pml4 = pmap_pml4e(pmap, va);
+	db_printf("VA %#016lx pml4e %#016lx", va, *pml4);
+	if ((*pml4 & PG_V) == 0) {
+		db_printf("\n");
+		return;
+	}
+	pdp = pmap_pml4e_to_pdpe(pml4, va);
+	db_printf(" pdpe %#016lx", *pdp);
+	if ((*pdp & PG_V) == 0 || (*pdp & PG_PS) != 0) {
+		db_printf("\n");
+		return;
+	}
+	pde = pmap_pdpe_to_pde(pdp, va);
+	db_printf(" pde %#016lx", *pde);
+	if ((*pde & PG_V) == 0 || (*pde & PG_PS) != 0) {
+		db_printf("\n");
+		return;
+	}
+	pte = pmap_pde_to_pte(pde, va);
+	db_printf(" pte %#016lx\n", *pte);
+}
+#endif