From 5d291f76e6d35d7556b8c095a45d02282569e29a Mon Sep 17 00:00:00 2001
From: Andrew Turner <andrew@FreeBSD.org>
Date: Fri, 3 Apr 2015 15:47:48 +0000
Subject: [PATCH] Add the start of the efi fdt bindings. These will be used on
 arm and arm64.

Sponsored by:	The FreeBSD Foundation
---
 sys/boot/efi/fdt/Makefile  | 36 ++++++++++++++++++++++
 sys/boot/efi/fdt/efi_fdt.c | 63 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 99 insertions(+)
 create mode 100644 sys/boot/efi/fdt/Makefile
 create mode 100644 sys/boot/efi/fdt/efi_fdt.c

diff --git a/sys/boot/efi/fdt/Makefile b/sys/boot/efi/fdt/Makefile
new file mode 100644
index 000000000000..05fbee870b2c
--- /dev/null
+++ b/sys/boot/efi/fdt/Makefile
@@ -0,0 +1,36 @@
+# $FreeBSD$
+
+.include <src.opts.mk>
+
+.PATH: ${.CURDIR}/../../common
+
+LIB=		efi_fdt
+INTERNALLIB=
+
+SRCS=		efi_fdt.c
+
+CFLAGS+=	-ffreestanding -msoft-float
+.if ${MACHINE_CPUARCH} == "arm64"
+CFLAGS+=	-mgeneral-regs-only
+.endif
+
+CFLAGS+=	-I${.CURDIR}/../../../../lib/libstand/
+
+# EFI library headers
+CFLAGS+=	-I${.CURDIR}/../include
+CFLAGS+=	-I${.CURDIR}/../include/${MACHINE_CPUARCH}
+
+# libfdt headers
+CFLAGS+=	-I${.CURDIR}/../../fdt
+
+# Pick up the bootstrap header for some interface items
+CFLAGS+=	-I${.CURDIR}/../../common -I${.CURDIR}/../../.. -I.
+
+machine:
+	ln -sf ${.CURDIR}/../../../${MACHINE_CPUARCH}/include machine
+
+CLEANFILES+=	machine
+
+.include <bsd.lib.mk>
+
+beforedepend ${OBJS}: machine
diff --git a/sys/boot/efi/fdt/efi_fdt.c b/sys/boot/efi/fdt/efi_fdt.c
new file mode 100644
index 000000000000..d6ee85cec257
--- /dev/null
+++ b/sys/boot/efi/fdt/efi_fdt.c
@@ -0,0 +1,63 @@
+/*-
+ * Copyright (c) 2014 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Andrew Turner under
+ * sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <stand.h>
+#include <efi.h>
+#include <efilib.h>
+#include <fdt_platform.h>
+
+#include "bootstrap.h"
+
+static EFI_GUID fdtdtb = FDT_TABLE_GUID;
+
+int
+fdt_platform_load_dtb(void)
+{
+	struct fdt_header *hdr;
+	int err;
+
+	hdr = efi_get_table(&fdtdtb);
+	if (hdr != NULL) {
+		if (fdt_load_dtb_addr(hdr) == 0) {
+			printf("Using DTB provided by EFI at %p.\n", hdr);
+			return (0);
+		}
+	}
+
+	return (err);
+}
+
+void
+fdt_platform_fixups(void)
+{
+}