Patch by Yuli Barcohen, 14 Aug 2003:

add support for bzip2 uncompression

CHANGELOG

@@ -2,6 +2,12 @@
 Changes for U-Boot 0.4.7:
 ======================================================================
 
+* Patch by Yuli Barcohen, 14 Aug 2003:
+  add support for bzip2 uncompression
+
+* Add GCC library to examples/Makefile so GCC utility functions will
+  be resolved, too
+
 * Add I2C and RTC support for RMU board using software I2C driver
   (because of better response to iprobe command); fix problem with
   "reset" command

README

@@ -859,6 +859,16 @@ The following options need to be configured:
 		allows for a "silent" boot where a splash screen is
 		loaded very quickly after power-on.
 
+- Compression support:
+		CONFIG_BZIP2
+
+		If this option is set, support for bzip2 compressed
+		images is included. If not, only uncompressed and gzip
+		compressed images are supported.
+
+                NOTE: the bzip2 algorithm requires a lot of RAM, so
+                the malloc area (as defined by CFG_MALLOC_LEN) should
+                be at least 4MB.
 
 - Ethernet address:
 		CONFIG_ETHADDR
@@ -2263,8 +2273,7 @@ defines the following image properties:
 * Target CPU Architecture (Provisions for Alpha, ARM, Intel x86,
   IA64, MIPS, MIPS, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit;
   Currently supported: PowerPC).
-* Compression Type (Provisions for uncompressed, gzip, bzip2;
-  Currently supported: uncompressed, gzip).
+* Compression Type (uncompressed, gzip, bzip2)
 * Load Address
 * Entry Point
 * Image Name

common/cmd_bootm.c

@@ -30,6 +30,7 @@
 #include <image.h>
 #include <malloc.h>
 #include <zlib.h>
+#include <bzlib.h>
 #include <environment.h>
 #include <asm/byteorder.h>
 
@@ -142,6 +143,7 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	ulong	addr;
 	ulong	data, len, checksum;
 	ulong  *len_ptr;
+	uint	unc_len = 0x400000;
 	int	i, verify;
 	char	*name, *s;
 	int	(*appl)(cmd_tbl_t *, int, int, char *[]);
@@ -307,13 +309,26 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 		break;
 	case IH_COMP_GZIP:
 		printf ("   Uncompressing %s ... ", name);
-		if (gunzip ((void *)ntohl(hdr->ih_load), 0x400000,
+		if (gunzip ((void *)ntohl(hdr->ih_load), unc_len,
 			    (uchar *)data, (int *)&len) != 0) {
 			printf ("GUNZIP ERROR - must RESET board to recover\n");
 			SHOW_BOOT_PROGRESS (-6);
 			do_reset (cmdtp, flag, argc, argv);
 		}
 		break;
+#ifdef CONFIG_BZIP2
+	case IH_COMP_BZIP2:
+		printf ("   Uncompressing %s ... ", name);
+		i = BZ2_bzBuffToBuffDecompress ((char*)ntohl(hdr->ih_load),
+						&unc_len, (char *)data, len, 0, 0);
+		if (i != BZ_OK) {
+			printf ("BUNZIP2 ERROR %d - must RESET board to recover\n", i);
+			SHOW_BOOT_PROGRESS (-6);
+			udelay(100000);
+			do_reset (cmdtp, flag, argc, argv);
+		}
+		break;
+#endif /* CONFIG_BZIP2 */
 	default:
 		if (iflag)
 			enable_interrupts();
@@ -1206,6 +1221,13 @@ int gunzip(void *dst, int dstlen, unsigned char *src, int *lenp)
 	return (0);
 }
 
+#ifdef CONFIG_BZIP2
+void bz_internal_error(int errcode)
+{
+	printf ("BZIP2 internal error %d\n", errcode);
+}
+#endif /* CONFIG_BZIP2 */
+
 static void
 do_bootm_rtems (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 		ulong addr, ulong *len_ptr, int verify)

examples/Makefile

@@ -79,6 +79,8 @@ endif
 LIBCOBJS= stubs.o
 LIBOBJS	= $(LIBAOBJS) $(LIBCOBJS)
 
+gcclibdir := $(shell dirname `$(CC) -print-libgcc-file-name`)
+
 CPPFLAGS += -I..
 
 all:	.depend $(LIB) $(SREC) $(BIN)
@@ -88,7 +90,8 @@ $(LIB): .depend $(LIBOBJS)
 	$(AR) crv $@ $(LIBOBJS)
 
 %.srec:	%.o $(LIB)
-	$(LD) -g -Ttext $(LOAD_ADDR) -o $(<:.o=) -e $(<:.o=) $< $(LIB)
+	$(LD) -g -Ttext $(LOAD_ADDR) -o $(<:.o=) -e $(<:.o=) $< $(LIB) \
+		-L$(gcclibdir) -lgcc
 	$(OBJCOPY) -O srec $(<:.o=) $@
 
 %.bin:	%.srec