From c853d945d3e0cadf60da03106f7d9bbf1346a518 Mon Sep 17 00:00:00 2001
From: Wu Zhangjin <wuzhangjin@gmail.com>
Date: Wed, 2 Jun 2010 16:35:24 +0800
Subject: [PATCH] MIPS: Unify the suffix of compressed vmlinux.bin

The compressed vmlinux.bin is only a temp file so it's ok to use the same
suffix .z for them (.gz,.lzo,.lzma...) to remove several lines and simpify
the maintenance (no need to add the "suffix_$(xxx) := suffix" line).

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
To: linux-mips <linux-mips@linux-mips.org>
Cc: Alexander Clouter <alex@digriz.org.uk>
Cc: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Patchwork: https://patchwork.linux-mips.org/patch/1323/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

---
---
 arch/mips/boot/compressed/Makefile            | 12 ++--
 .../boot/compressed/calc_vmlinuz_load_addr.c  | 57 +++++++++++++++++++
 2 files changed, 61 insertions(+), 8 deletions(-)
 create mode 100644 arch/mips/boot/compressed/calc_vmlinuz_load_addr.c

diff --git a/arch/mips/boot/compressed/Makefile b/arch/mips/boot/compressed/Makefile
index edc48adf8845..3bdbeef0e0f5 100644
--- a/arch/mips/boot/compressed/Makefile
+++ b/arch/mips/boot/compressed/Makefile
@@ -48,23 +48,19 @@ OBJCOPYFLAGS_vmlinux.bin := $(OBJCOPYFLAGS) -O binary -R .comment -S
 $(obj)/vmlinux.bin: $(KBUILD_IMAGE) FORCE
 	$(call if_changed,objcopy)
 
-suffix_$(CONFIG_KERNEL_GZIP)  = gz
-suffix_$(CONFIG_KERNEL_BZIP2) = bz2
-suffix_$(CONFIG_KERNEL_LZMA)  = lzma
-suffix_$(CONFIG_KERNEL_LZO)   = lzo
 tool_$(CONFIG_KERNEL_GZIP)    = gzip
 tool_$(CONFIG_KERNEL_BZIP2)   = bzip2
 tool_$(CONFIG_KERNEL_LZMA)    = lzma
 tool_$(CONFIG_KERNEL_LZO)     = lzo
 
-targets += vmlinux.gz vmlinux.bz2 vmlinux.lzma vmlinux.lzo
-$(obj)/vmlinux.$(suffix_y): $(obj)/vmlinux.bin FORCE
+targets += vmlinux.bin.z
+$(obj)/vmlinux.bin.z: $(obj)/vmlinux.bin FORCE
 	$(call if_changed,$(tool_y))
 
 targets += piggy.o
-OBJCOPYFLAGS_piggy.o := --add-section=.image=$(obj)/vmlinux.$(suffix_y) \
+OBJCOPYFLAGS_piggy.o := --add-section=.image=$(obj)/vmlinux.bin.z \
                         --set-section-flags=.image=contents,alloc,load,readonly,data
-$(obj)/piggy.o: $(obj)/dummy.o $(obj)/vmlinux.$(suffix_y) FORCE
+$(obj)/piggy.o: $(obj)/dummy.o $(obj)/vmlinux.bin.z FORCE
 	$(call if_changed,objcopy)
 
 LDFLAGS_vmlinuz := $(LDFLAGS) -Ttext $(VMLINUZ_LOAD_ADDRESS) -T
diff --git a/arch/mips/boot/compressed/calc_vmlinuz_load_addr.c b/arch/mips/boot/compressed/calc_vmlinuz_load_addr.c
new file mode 100644
index 000000000000..88c9d963be88
--- /dev/null
+++ b/arch/mips/boot/compressed/calc_vmlinuz_load_addr.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2010 "Wu Zhangjin" <wuzhangjin@gmail.com>
+ *
+ * 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.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char *argv[])
+{
+	struct stat sb;
+	uint64_t vmlinux_size, vmlinux_load_addr, vmlinuz_load_addr;
+
+	if (argc != 3) {
+		fprintf(stderr, "Usage: %s <pathname> <vmlinux_load_addr>\n",
+				argv[0]);
+		return EXIT_FAILURE;
+	}
+
+	if (stat(argv[1], &sb) == -1) {
+		perror("stat");
+		return EXIT_FAILURE;
+	}
+
+	/* Convert hex characters to dec number */
+	errno = 0;
+	if (sscanf(argv[2], "%llx", &vmlinux_load_addr) != 1) {
+		if (errno != 0)
+			perror("sscanf");
+		else
+			fprintf(stderr, "No matching characters\n");
+
+		return EXIT_FAILURE;
+	}
+
+	vmlinux_size = (uint64_t)sb.st_size;
+	vmlinuz_load_addr = vmlinux_load_addr + vmlinux_size;
+
+	/*
+	 * Align with 16 bytes: "greater than that used for any standard data
+	 * types by a MIPS compiler." -- See MIPS Run Linux (Second Edition).
+	 */
+
+	vmlinuz_load_addr += (16 - vmlinux_size % 16);
+
+	printf("0x%llx\n", vmlinuz_load_addr);
+
+	return EXIT_SUCCESS;
+}