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From 160f15aa3b87b6b7b16ccad99f5ce110cacb8256 Mon Sep 17 00:00:00 2001
From: Marc Andre Tanner <mat at brain-dump.org>
Date: Fri, 20 Nov 2009 15:07:42 +0100
Subject: [PATCH 2/2] kexec-arm: add uImage support

uImages are basically just zImages with a special header,
we therefore just skip the header and let the normal zImage
infrastructure do the actual work.

Signed-off-by: Marc Andre Tanner <mat at brain-dump.org>
---
 kexec/arch/arm/Makefile           |    2 +
 kexec/arch/arm/kexec-arm.c        |    3 +
 kexec/arch/arm/kexec-arm.h        |    4 +
 kexec/arch/arm/kexec-uImage-arm.c |   33 ++++++++
 kexec/arch/arm/kexec-uImage-arm.h |  161 +++++++++++++++++++++++++++++++++++++
 5 files changed, 203 insertions(+), 0 deletions(-)
 create mode 100644 kexec/arch/arm/kexec-uImage-arm.c
 create mode 100644 kexec/arch/arm/kexec-uImage-arm.h

diff --git a/kexec/arch/arm/Makefile b/kexec/arch/arm/Makefile
index e05e4c7..806c4d9 100644
--- a/kexec/arch/arm/Makefile
+++ b/kexec/arch/arm/Makefile
@@ -3,8 +3,10 @@
 #
 arm_KEXEC_SRCS=  kexec/arch/arm/kexec-elf-rel-arm.c
 arm_KEXEC_SRCS+= kexec/arch/arm/kexec-zImage-arm.c
+arm_KEXEC_SRCS+= kexec/arch/arm/kexec-uImage-arm.c
 arm_KEXEC_SRCS+= kexec/arch/arm/kexec-arm.c
 
 dist += kexec/arch/arm/Makefile $(arm_KEXEC_SRCS)			\
 	kexec/arch/arm/kexec-arm.h					\
+	kexec/arch/arm/kexec-uImage-arm.h				\
 	kexec/arch/arm/include/arch/options.h
diff --git a/kexec/arch/arm/kexec-arm.c b/kexec/arch/arm/kexec-arm.c
index 2e50489..3fdf839 100644
--- a/kexec/arch/arm/kexec-arm.c
+++ b/kexec/arch/arm/kexec-arm.c
@@ -74,6 +74,9 @@ int get_memory_ranges(struct memory_range **range, int *ranges,
 
 /* Supported file types and callbacks */
 struct file_type file_type[] = {
+	/* uImage is probed before zImage because the latter also accepts
+	   uncompressed images. */
+	{"uImage", uImage_arm_probe, uImage_arm_load, zImage_arm_usage},
 	{"zImage", zImage_arm_probe, zImage_arm_load, zImage_arm_usage},
 };
 int file_types = sizeof(file_type) / sizeof(file_type[0]);
diff --git a/kexec/arch/arm/kexec-arm.h b/kexec/arch/arm/kexec-arm.h
index bb41ce0..0d9a066 100644
--- a/kexec/arch/arm/kexec-arm.h
+++ b/kexec/arch/arm/kexec-arm.h
@@ -6,4 +6,8 @@ int zImage_arm_load(int argc, char **argv, const char *buf, off_t len,
 		        struct kexec_info *info);
 void zImage_arm_usage(void);
 
+int uImage_arm_probe(const char *buf, off_t len);
+int uImage_arm_load(int argc, char **argv, const char *buf, off_t len,
+		        struct kexec_info *info);
+
 #endif /* KEXEC_ARM_H */
diff --git a/kexec/arch/arm/kexec-uImage-arm.c b/kexec/arch/arm/kexec-uImage-arm.c
new file mode 100644
index 0000000..218148a
--- /dev/null
+++ b/kexec/arch/arm/kexec-uImage-arm.c
@@ -0,0 +1,33 @@
+/*
+ * uImage support added by Marc Andre Tanner <mat at brain-dump.org>
+ */
+#include <stdint.h>
+#include <string.h>
+#include <sys/types.h>
+#include "../../kexec.h"
+#include "kexec-arm.h"
+#include "kexec-uImage-arm.h"
+
+int uImage_arm_probe(const char *buf, off_t len)
+{
+	struct image_header header;
+
+	if (len < sizeof(header))
+		return -1;
+
+	memcpy(&header, buf, sizeof(header));
+
+	if (cpu_to_be32(header.ih_magic) != IH_MAGIC)
+		return -1;
+
+	/* XXX: check CRC Checksum? */
+
+	return 0;
+}
+
+int uImage_arm_load(int argc, char **argv, const char *buf, off_t len,
+	struct kexec_info *info)
+{
+	return zImage_arm_load(argc, argv, buf + sizeof(struct image_header),
+	                       len - sizeof(struct image_header), info);
+}
diff --git a/kexec/arch/arm/kexec-uImage-arm.h b/kexec/arch/arm/kexec-uImage-arm.h
new file mode 100644
index 0000000..b9079a4
--- /dev/null
+++ b/kexec/arch/arm/kexec-uImage-arm.h
@@ -0,0 +1,161 @@
+/*
+ * (C) Copyright 2000-2005
+ * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ ********************************************************************
+ * NOTE: This header file defines an interface to U-Boot. Including
+ * this (unmodified) header file in another file is considered normal
+ * use of U-Boot, and does *not* fall under the heading of "derived
+ * work".
+ ********************************************************************
+ */
+
+#ifndef __IMAGE_H__
+#define __IMAGE_H__
+
+/*
+ * Operating System Codes
+ */
+#define IH_OS_INVALID		0	/* Invalid OS	*/
+#define IH_OS_OPENBSD		1	/* OpenBSD	*/
+#define IH_OS_NETBSD		2	/* NetBSD	*/
+#define IH_OS_FREEBSD		3	/* FreeBSD	*/
+#define IH_OS_4_4BSD		4	/* 4.4BSD	*/
+#define IH_OS_LINUX		5	/* Linux	*/
+#define IH_OS_SVR4		6	/* SVR4		*/
+#define IH_OS_ESIX		7	/* Esix		*/
+#define IH_OS_SOLARIS		8	/* Solaris	*/
+#define IH_OS_IRIX		9	/* Irix		*/
+#define IH_OS_SCO		10	/* SCO		*/
+#define IH_OS_DELL		11	/* Dell		*/
+#define IH_OS_NCR		12	/* NCR		*/
+#define IH_OS_LYNXOS		13	/* LynxOS	*/
+#define IH_OS_VXWORKS		14	/* VxWorks	*/
+#define IH_OS_PSOS		15	/* pSOS		*/
+#define IH_OS_QNX		16	/* QNX		*/
+#define IH_OS_U_BOOT		17	/* Firmware	*/
+#define IH_OS_RTEMS		18	/* RTEMS	*/
+#define IH_OS_ARTOS		19	/* ARTOS	*/
+#define IH_OS_UNITY		20	/* Unity OS	*/
+
+/*
+ * CPU Architecture Codes (supported by Linux)
+ */
+#define IH_CPU_INVALID		0	/* Invalid CPU	*/
+#define IH_CPU_ALPHA		1	/* Alpha	*/
+#define IH_CPU_ARM		2	/* ARM		*/
+#define IH_CPU_I386		3	/* Intel x86	*/
+#define IH_CPU_IA64		4	/* IA64		*/
+#define IH_CPU_MIPS		5	/* MIPS		*/
+#define IH_CPU_MIPS64		6	/* MIPS	 64 Bit */
+#define IH_CPU_PPC		7	/* PowerPC	*/
+#define IH_CPU_S390		8	/* IBM S390	*/
+#define IH_CPU_SH		9	/* SuperH	*/
+#define IH_CPU_SPARC		10	/* Sparc	*/
+#define IH_CPU_SPARC64		11	/* Sparc 64 Bit */
+#define IH_CPU_M68K		12	/* M68K		*/
+#define IH_CPU_NIOS		13	/* Nios-32	*/
+#define IH_CPU_MICROBLAZE	14	/* MicroBlaze   */
+#define IH_CPU_NIOS2		15	/* Nios-II	*/
+#define IH_CPU_BLACKFIN		16	/* Blackfin	*/
+#define IH_CPU_AVR32		17	/* AVR32	*/
+
+/*
+ * Image Types
+ *
+ * "Standalone Programs" are directly runnable in the environment
+ *	provided by U-Boot; it is expected that (if they behave
+ *	well) you can continue to work in U-Boot after return from
+ *	the Standalone Program.
+ * "OS Kernel Images" are usually images of some Embedded OS which
+ *	will take over control completely. Usually these programs
+ *	will install their own set of exception handlers, device
+ *	drivers, set up the MMU, etc. - this means, that you cannot
+ *	expect to re-enter U-Boot except by resetting the CPU.
+ * "RAMDisk Images" are more or less just data blocks, and their
+ *	parameters (address, size) are passed to an OS kernel that is
+ *	being started.
+ * "Multi-File Images" contain several images, typically an OS
+ *	(Linux) kernel image and one or more data images like
+ *	RAMDisks. This construct is useful for instance when you want
+ *	to boot over the network using BOOTP etc., where the boot
+ *	server provides just a single image file, but you want to get
+ *	for instance an OS kernel and a RAMDisk image.
+ *
+ *	"Multi-File Images" start with a list of image sizes, each
+ *	image size (in bytes) specified by an "uint32_t" in network
+ *	byte order. This list is terminated by an "(uint32_t)0".
+ *	Immediately after the terminating 0 follow the images, one by
+ *	one, all aligned on "uint32_t" boundaries (size rounded up to
+ *	a multiple of 4 bytes - except for the last file).
+ *
+ * "Firmware Images" are binary images containing firmware (like
+ *	U-Boot or FPGA images) which usually will be programmed to
+ *	flash memory.
+ *
+ * "Script files" are command sequences that will be executed by
+ *	U-Boot's command interpreter; this feature is especially
+ *	useful when you configure U-Boot to use a real shell (hush)
+ *	as command interpreter (=> Shell Scripts).
+ */
+
+#define IH_TYPE_INVALID		0	/* Invalid Image		*/
+#define IH_TYPE_STANDALONE	1	/* Standalone Program		*/
+#define IH_TYPE_KERNEL		2	/* OS Kernel Image		*/
+#define IH_TYPE_RAMDISK		3	/* RAMDisk Image		*/
+#define IH_TYPE_MULTI		4	/* Multi-File Image		*/
+#define IH_TYPE_FIRMWARE	5	/* Firmware Image		*/
+#define IH_TYPE_SCRIPT		6	/* Script file			*/
+#define IH_TYPE_FILESYSTEM	7	/* Filesystem Image (any type)	*/
+#define IH_TYPE_FLATDT		8	/* Binary Flat Device Tree Blob	*/
+
+/*
+ * Compression Types
+ */
+#define IH_COMP_NONE		0	/*  No	 Compression Used	*/
+#define IH_COMP_GZIP		1	/* gzip	 Compression Used	*/
+#define IH_COMP_BZIP2		2	/* bzip2 Compression Used	*/
+#define IH_COMP_LZMA		3	/* lzma  Compression Used	*/
+
+#define IH_MAGIC	0x27051956	/* Image Magic Number		*/
+#define IH_NMLEN		32	/* Image Name Length		*/
+
+/*
+ * all data in network byte order (aka natural aka bigendian)
+ */
+
+typedef struct image_header {
+	uint32_t	ih_magic;	/* Image Header Magic Number	*/
+	uint32_t	ih_hcrc;	/* Image Header CRC Checksum	*/
+	uint32_t	ih_time;	/* Image Creation Timestamp	*/
+	uint32_t	ih_size;	/* Image Data Size		*/
+	uint32_t	ih_load;	/* Data	 Load  Address		*/
+	uint32_t	ih_ep;		/* Entry Point Address		*/
+	uint32_t	ih_dcrc;	/* Image Data CRC Checksum	*/
+	uint8_t		ih_os;		/* Operating System		*/
+	uint8_t		ih_arch;	/* CPU architecture		*/
+	uint8_t		ih_type;	/* Image Type			*/
+	uint8_t		ih_comp;	/* Compression Type		*/
+	uint8_t		ih_name[IH_NMLEN];	/* Image Name		*/
+} image_header_t;
+
+
+#endif	/* __IMAGE_H__ */
-- 
1.6.4.4