compressed image: add gzip support

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

arch/arm/cpu/start-pbl.c

@@ -46,6 +46,10 @@ extern void *input_data_end;
 #include "../../../lib/decompress_unlzo.c"
 #endif
 
+#ifdef CONFIG_IMAGE_COMPRESSION_GZIP
+#include "../../../../lib/decompress_inflate.c"
+#endif
+
 static void barebox_uncompress(void *compressed_start, unsigned int len)
 {
 	void (*barebox)(void);

arch/arm/pbl/Makefile

@@ -1,4 +1,5 @@
 
+suffix_$(CONFIG_IMAGE_COMPRESSION_GZIP) = gzip
 suffix_$(CONFIG_IMAGE_COMPRESSION_LZO)	= lzo
 
 OBJCOPYFLAGS_zbarebox.bin = -O binary

arch/arm/pbl/piggy.gzip.S

@@ -0,0 +1,6 @@
+	.section .piggydata,#alloc
+	.globl  input_data
+input_data:
+	.incbin "arch/arm/pbl/piggy.gzip"
+	.globl  input_data_end
+input_data_end:

common/Kconfig

@@ -134,6 +134,9 @@ choice
 config IMAGE_COMPRESSION_LZO
 	bool "lzo"
 
+config IMAGE_COMPRESSION_GZIP
+	bool "gzip"
+
 endchoice
 
 endif
@@ -521,6 +524,7 @@ config DEFAULT_ENVIRONMENT_COMPRESSED
 	bool
 	depends on DEFAULT_ENVIRONMENT
 	depends on !IMAGE_COMPRESSION_LZO
+	depends on !IMAGE_COMPRESSION_GZIP
 	default y if ZLIB
 	default y if BZLIB
 	default y if LZO_DECOMPRESS

lib/decompress_inflate.c

@@ -4,6 +4,7 @@
 /* prevent inclusion of _LINUX_KERNEL_H in pre-boot environment: lots
  * errors about console_printk etc... on ARM */
 #define _LINUX_KERNEL_H
+#include <linux/decompress/mm.h>
 
 #include "zlib_inflate/inftrees.c"
 #include "zlib_inflate/inffast.c"