PERFORCE change 1199466 for review

[John Baldwin]

http://p4web.freebsd.org/@@1199466?ac=10

Change 1199466 by jhb at jhb_ralph on 2014/08/28 12:34:36

	Port the smap handler to i386.

Affected files ...

.. //depot/projects/smpng/sys/i386/i386/machdep.c#189 edit

Differences ...

==== //depot/projects/smpng/sys/i386/i386/machdep.c#189 (text+ko) ====

@@ -3122,6 +3122,42 @@
 	pcpu->pc_acpi_id = 0xffffffff;
 }
 
+static int
+smap_sysctl_handler(SYSCTL_HANDLER_ARGS)
+{
+	struct bios_smap *smapbase;
+	struct bios_smap_xattr smap;
+	caddr_t kmdp;
+	uint32_t *smapattr;
+	int count, error, i;
+
+	/* Retrieve the system memory map from the loader. */
+	kmdp = preload_search_by_type("elf kernel");
+	if (kmdp == NULL)
+		kmdp = preload_search_by_type("elf32 kernel");
+	smapbase = (struct bios_smap *)preload_search_info(kmdp,
+	    MODINFO_METADATA | MODINFOMD_SMAP);
+	if (smapbase == NULL)
+		return (0);
+	smapattr = (uint32_t *) = preload_search_info(kmdp,
+	    MODINFO_METADATA | MODINFOMD_SMAP_XATTR);
+	count = *((u_int32_t *)smapbase - 1) / sizeof(*smapbase);
+	error = 0;
+	for (i = 0; i < count; i++) {
+		smap.base = smapbase[i].base;
+		smap.length = smapbase[i].length;
+		smap.type = smapbase[i].type;
+		if (smapattr != NULL)
+			smap.xattr = smapattr[i];
+		else
+			smap.xattr = 0;
+		error = SYSCTL_OUT(req, &smap, sizeof(smap));
+	}
+	return (error);
+}
+SYSCTL_PROC(_machdep, OID_AUTO, smap, CTLTYPE_OPAQUE|CTLFLAG_RD, NULL, 0,
+    smap_sysctl_handler, "S,bios_smap_xattr", "Raw BIOS SMAP data");
+
 void
 spinlock_enter(void)
 {