Merge in new cfe environment passing of kenv for swarm/sibyte boards.

Submitted by:	Neelkanth Natu

sys/conf/files.mips

@@ -96,6 +96,7 @@ libkern/umoddi3.c		standard
 
 dev/cfe/cfe_api.c		optional	cfe
 dev/cfe/cfe_console.c		optional	cfe_console
+dev/cfe/cfe_env.c		optional	cfe_env
 #dev/cfe/cfe_resource.c		optional	cfe	# not yet needed
 
 dev/siba/siba.c			optional	siba

sys/conf/options.mips

@@ -44,6 +44,8 @@ ISA_MIPS64v2	opt_cputype.h
 YAMON		opt_global.h
 CFE		opt_global.h
 CFE_CONSOLE	opt_global.h
+CFE_ENV		opt_global.h
+CFE_ENV_SIZE	opt_global.h
 
 KERNPHYSADDR	opt_global.h
 KERNVIRTADDR	opt_global.h

sys/dev/cfe/cfe_env.c

@@ -0,0 +1,74 @@
+/*-
+ * Copyright (c) 2009 Neelkanth Natu
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/systm.h>
+
+#include <dev/cfe/cfe_api.h>
+
+__FBSDID("$FreeBSD$");
+
+#ifndef	CFE_ENV_SIZE
+#define	CFE_ENV_SIZE	PAGE_SIZE	/* default is one page */
+#endif
+
+extern void cfe_env_init(void);
+
+static char cfe_env_buf[CFE_ENV_SIZE];
+
+void
+cfe_env_init(void)
+{
+	int idx, len;
+	char name[64], val[128], *cp, *cplim;
+
+	cp = cfe_env_buf;
+	cplim = cp + CFE_ENV_SIZE;
+
+	idx = 0;
+	while (1) {
+		if (cfe_enumenv(idx, name, sizeof(name), val, sizeof(val)) != 0)
+			break;
+
+		if (bootverbose)
+			printf("Importing CFE env: \"%s=%s\"\n", name, val);
+
+		/*
+		 * name=val\0\0
+		 */
+		len = strlen(name) + 1 + strlen(val) + 1 + 1;
+		if (cplim - cp < len)
+			printf("No space to store CFE env: \"%s=%s\"\n",
+				name, val);
+		else
+			cp += sprintf(cp, "%s=%s", name, val) + 1;
+		++idx;
+	}
+	*cp++ = '\0';
+
+	kern_envp = cfe_env_buf;
+}