patch-2.4.22 linux-2.4.22/arch/sh64/boot/compressed/misc.c

• Lines: 252
• Date: 2003-08-25 04:44:40.000000000 -0700
• Orig file: linux-2.4.21/arch/sh64/boot/compressed/misc.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/arch/sh64/boot/compressed/misc.c linux-2.4.22/arch/sh64/boot/compressed/misc.c
@@ -0,0 +1,251 @@
+/*
+ * arch/shmedia/boot/compressed/misc.c
+ * 
+ * This is a collection of several routines from gzip-1.0.3 
+ * adapted for Linux.
+ *
+ * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
+ *
+ * Adapted for SHmedia from sh by Stuart Menefy, May 2002
+ */
+
+#include <linux/config.h>
+#include <asm/uaccess.h>
+
+/* cache.c */
+#define CACHE_ENABLE      0
+#define CACHE_DISABLE     1
+int cache_control(unsigned int command);
+
+/*
+ * 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 void gzip_mark(void **);
+static void gzip_release(void **);
+
+extern char input_data[];
+extern int input_len;
+
+static long bytes_out = 0;
+static uch *output_data;
+static unsigned long output_ptr = 0;
+
+static void *malloc(int size);
+static void free(void *where);
+static void error(char *m);
+static void gzip_mark(void **);
+static void gzip_release(void **);
+
+static void puts(const char *);
+
+extern int _text;		/* Defined in vmlinux.lds.S */
+extern int _end;
+static unsigned long free_mem_ptr;
+static unsigned long free_mem_end_ptr;
+
+#define HEAP_SIZE             0x10000
+
+#include "../../../../lib/inflate.c"
+
+static void *malloc(int size)
+{
+	void *p;
+
+	if (size < 0)
+		error("Malloc error\n");
+	if (free_mem_ptr == 0)
+		error("Memory error\n");
+
+	free_mem_ptr = (free_mem_ptr + 3) & ~3;	/* Align */
+
+	p = (void *) free_mem_ptr;
+	free_mem_ptr += size;
+
+	if (free_mem_ptr >= free_mem_end_ptr)
+		error("\nOut of memory\n");
+
+	return p;
+}
+
+static void free(void *where)
+{				/* Don't care */
+}
+
+static void gzip_mark(void **ptr)
+{
+	*ptr = (void *) free_mem_ptr;
+}
+
+static void gzip_release(void **ptr)
+{
+	free_mem_ptr = (long) *ptr;
+}
+
+void puts(const char *s)
+{
+}
+
+void *memset(void *s, int c, size_t n)
+{
+	int i;
+	char *ss = (char *) s;
+
+	for (i = 0; i < n; i++)
+		ss[i] = c;
+	return s;
+}
+
+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\n");
+	}
+
+	inbuf = input_data;
+	insize = input_len;
+	inptr = 1;
+	return inbuf[0];
+}
+
+/* ===========================================================================
+ * 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;
+
+	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;
+	puts(".");
+}
+
+static void error(char *x)
+{
+	puts("\n\n");
+	puts(x);
+	puts("\n\n -- System halted");
+
+	while (1) ;		/* Halt */
+}
+
+#define STACK_SIZE (4096)
+long __attribute__ ((aligned(8))) user_stack[STACK_SIZE];
+long *stack_start = &user_stack[STACK_SIZE];
+
+void decompress_kernel(void)
+{
+	output_data = (uch *) (CONFIG_MEMORY_START + 0x2000);
+	free_mem_ptr = (unsigned long) &_end;
+	free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
+
+	makecrc();
+	puts("Uncompressing Linux... ");
+	cache_control(CACHE_ENABLE);
+	gunzip();
+	puts("\n");
+
+#if 0
+	/* When booting from ROM may want to do something like this if the
+	 * boot loader doesn't.
+	 */
+
+	/* Set up the parameters and command line */
+	{
+		volatile unsigned int *parambase =
+		    (int *) (CONFIG_MEMORY_START + 0x1000);
+
+		parambase[0] = 0x1;	/* MOUNT_ROOT_RDONLY */
+		parambase[1] = 0x0;	/* RAMDISK_FLAGS */
+		parambase[2] = 0x0200;	/* ORIG_ROOT_DEV */
+		parambase[3] = 0x0;	/* LOADER_TYPE */
+		parambase[4] = 0x0;	/* INITRD_START */
+		parambase[5] = 0x0;	/* INITRD_SIZE */
+		parambase[6] = 0;
+
+		strcpy((char *) ((int) parambase + 0x100),
+		       "console=ttySC0,38400");
+	}
+#endif
+
+	puts("Ok, booting the kernel.\n");
+
+	cache_control(CACHE_DISABLE);
+}