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From: "Bjoern A. Zeeb" <bz@FreeBSD.org>
Subject: PERFORCE change 221680 for review
To: Perforce Change Reviews <perforce@FreeBSD.org>
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http://p4web.freebsd.org/@@221680?ac=10

Change 221680 by bz@bz_zenith on 2013/02/01 16:57:44

	Export the factory PPR to kenv so that user space can access it.
	Using kenv now so that in the case of loader we would not have
	to adjust user space code anymore.
	This is a per-board unique 64bit value which we can use to derive
	Ethernet address from and possibly seed into the random pool as well.

Affected files ...

.. //depot/projects/ctsrd/beribsd/src/sys/dev/isf/isf.c#14 edit

Differences ...

==== //depot/projects/ctsrd/beribsd/src/sys/dev/isf/isf.c#14 (text+ko) ====

@@ -686,6 +686,7 @@
 	uint16_t		id;
 	u_long			start, size;
 	struct isf_chips	*cp = chip_ids;
+	char			name[112], value[32];
 
 	start = rman_get_start(sc->isf_res);
 	if (start % 2 != 0) {
@@ -717,6 +718,22 @@
 	ISF_LOCK_INIT(sc);
 	sc->isf_disk = NULL;
 	isf_disk_insert(sc, size);
+
+#if 1
+	/*
+	 * Try best effort to export the information, currently only needed 
+	 * to do Ethernet address initialization.   Later loader will do this
+	 * thus we prefer kenv here rather than a sysctl.
+	 */
+	isf_write_cmd(sc, 0, ISF_CMD_RDI);
+	if (snprintf(name, sizeof(name), "%s.factory_ppr",
+	    device_get_nameunit(sc->isf_dev)) < (sizeof(name) - 1) &&
+	    snprintf(value, sizeof(value), "0x%016jx",
+	    (uintmax_t)isf_read_reg64(sc, ISF_REG_FPP)) < (sizeof(value) - 1))
+		(void) setenv(name, value);
+	isf_write_cmd(sc, 0, ISF_CMD_RA);
+#endif
+
 	return(0);
 }