Commit 337214e8 authored by Hirokazu Takata's avatar Hirokazu Takata
Browse files

m32r: bzip2/lzma kernel compression support 



- Support bzip2 and lzma kernel compression for m32r.
- Clean up arch/m32r/boot/compressed/misc.c.

Signed-off-by: default avatarHirokazu Takata <takata@linux-m32r.org>
parent e968b8d4

arch/m32r/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -11,6 +11,9 @@ config M32R 
	select HAVE_IDE

	select HAVE_OPROFILE

	select INIT_ALL_POSSIBLE

	select HAVE_KERNEL_GZIP

	select HAVE_KERNEL_BZIP2

	select HAVE_KERNEL_LZMA



config SBUS

	bool

arch/m32r/boot/compressed/Makefile

+13 −3
Original line number Diff line number Diff line
@@ -4,8 +4,8 @@ 
# create a compressed vmlinux image from the original vmlinux

#



targets		:= vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o \

		   piggy.o vmlinux.lds

targets		:= vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 \

		   vmlinux.bin.lzma head.o misc.o piggy.o vmlinux.lds



OBJECTS = $(obj)/head.o $(obj)/misc.o
@@ -27,6 +27,12 @@ $(obj)/vmlinux.bin: vmlinux FORCE 
$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE

	$(call if_changed,gzip)



$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE

	$(call if_changed,bzip2)



$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE

	$(call if_changed,lzma)



CFLAGS_misc.o += -fpic



ifdef CONFIG_MMU
@@ -37,5 +43,9 @@ endif 


OBJCOPYFLAGS += -R .empty_zero_page



$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.gz FORCE

suffix_$(CONFIG_KERNEL_GZIP)	= gz

suffix_$(CONFIG_KERNEL_BZIP2)	= bz2

suffix_$(CONFIG_KERNEL_LZMA)	= lzma



$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.$(suffix_y) FORCE

	$(call if_changed,ld)

arch/m32r/boot/compressed/misc.c

+26 −117
Original line number Diff line number Diff line
@@ -9,140 +9,49 @@ 
 * Adapted for SH by Stuart Menefy, Aug 1999

 *

 * 2003-02-12:	Support M32R by Takeo Takahashi

 * 		This is based on arch/sh/boot/compressed/misc.c.

 */



#include <linux/string.h>



/*

 * gzip declarations

 */



#define OF(args)  args

#define STATIC static



#undef memset

#undef memcpy

#define memzero(s, n)     memset ((s), 0, (n))



typedef unsigned char  uch;

typedef unsigned short ush;

typedef unsigned long  ulg;



#define WSIZE 0x8000		/* Window size must be at least 32k, */

				/* and a power of two */



static uch *inbuf;	     /* input buffer */

static uch window[WSIZE];    /* Sliding window buffer */



static unsigned insize = 0;  /* valid bytes in inbuf */

static unsigned inptr = 0;   /* index of next byte to be processed in inbuf */

static unsigned outcnt = 0;  /* bytes in output buffer */



/* gzip flag byte */

#define ASCII_FLAG   0x01 /* bit 0 set: file probably ASCII text */

#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */

#define EXTRA_FIELD  0x04 /* bit 2 set: extra field present */

#define ORIG_NAME    0x08 /* bit 3 set: original file name present */

#define COMMENT      0x10 /* bit 4 set: file comment present */

#define ENCRYPTED    0x20 /* bit 5 set: file is encrypted */

#define RESERVED     0xC0 /* bit 6,7:   reserved */



#define get_byte()  (inptr < insize ? inbuf[inptr++] : fill_inbuf())



/* Diagnostic functions */

#ifdef DEBUG

#  define Assert(cond,msg) {if(!(cond)) error(msg);}

#  define Trace(x) fprintf x

#  define Tracev(x) {if (verbose) fprintf x ;}

#  define Tracevv(x) {if (verbose>1) fprintf x ;}

#  define Tracec(c,x) {if (verbose && (c)) fprintf x ;}

#  define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}

#else

#  define Assert(cond,msg)

#  define Trace(x)

#  define Tracev(x)

#  define Tracevv(x)

#  define Tracec(c,x)

#  define Tracecv(c,x)

#endif



static int  fill_inbuf(void);

static void flush_window(void);

static void error(char *m);



static unsigned char *input_data;

static int input_len;



static long bytes_out = 0;

static uch *output_data;

static unsigned long output_ptr = 0;



#include "m32r_sio.c"



static unsigned long free_mem_ptr;

static unsigned long free_mem_end_ptr;



#define HEAP_SIZE             0x10000



#include "../../../../lib/inflate.c"



void* memset(void* s, int c, size_t n)

#ifdef CONFIG_KERNEL_BZIP2

static void *memset(void *s, int c, size_t n)

{

	int i;

	char *ss = (char*)s;

	char *ss = s;



	for (i=0;i<n;i++) ss[i] = c;

	while (n--)

	       	*ss++ = c;

	return s;

}

#endif



void* memcpy(void* __dest, __const void* __src,

			    size_t __n)

{

	int i;

	char *d = (char *)__dest, *s = (char *)__src;



	for (i=0;i<__n;i++) d[i] = s[i];

	return __dest;

}



/* ===========================================================================

 * Fill the input buffer. This is called only when the buffer is empty

 * and at least one byte is really needed.

 */

static int fill_inbuf(void)

{

	if (insize != 0) {

		error("ran out of input data");

	}



	inbuf = input_data;

	insize = input_len;

	inptr = 1;

	return inbuf[0];

}

#ifdef CONFIG_KERNEL_GZIP

#define BOOT_HEAP_SIZE             0x10000

#include "../../../../lib/decompress_inflate.c"

#endif



/* ===========================================================================

 * Write the output window window[0..outcnt-1] and update crc and bytes_out.

 * (Used for the decompressed data only.)

 */

static void flush_window(void)

{

    ulg c = crc;         /* temporary variable */

    unsigned n;

    uch *in, *out, ch;

#ifdef CONFIG_KERNEL_BZIP2

#define BOOT_HEAP_SIZE             0x400000

#include "../../../../lib/decompress_bunzip2.c"

#endif



    in = window;

    out = &output_data[output_ptr];

    for (n = 0; n < outcnt; n++) {

	    ch = *out++ = *in++;

	    c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);

    }

    crc = c;

    bytes_out += (ulg)outcnt;

    output_ptr += (ulg)outcnt;

    outcnt = 0;

}

#ifdef CONFIG_KERNEL_LZMA

#define BOOT_HEAP_SIZE             0x10000

#include "../../../../lib/decompress_unlzma.c"

#endif



static void error(char *x)

{
@@ -153,20 +62,20 @@ static void error(char *x) 
	while(1);	/* Halt */

}



/* return decompressed size */

void

decompress_kernel(int mmu_on, unsigned char *zimage_data,

		  unsigned int zimage_len, unsigned long heap)

{

	unsigned char *input_data = zimage_data;

	int input_len = zimage_len;

	unsigned char *output_data;



	output_data = (unsigned char *)CONFIG_MEMORY_START + 0x2000

		+ (mmu_on ? 0x80000000 : 0);

	free_mem_ptr = heap;

	free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;

	input_data = zimage_data;

	input_len = zimage_len;

	free_mem_end_ptr = free_mem_ptr + BOOT_HEAP_SIZE;



	makecrc();

	puts("Uncompressing Linux... ");

	gunzip();

	puts("Ok, booting the kernel.\n");

	puts("\nDecompressing Linux... ");

	decompress(input_data, input_len, NULL, NULL, output_data, NULL, error);

	puts("done.\nBooting the kernel.\n");

}