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@@ -0,0 +1,219 @@
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+/*
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+ * arch/h8300/boot/compressed/misc.c
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+ *
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+ * This is a collection of several routines from gzip-1.0.3
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+ * adapted for Linux.
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+ *
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+ * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
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+ *
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+ * Adapted for h8300 by Yoshinori Sato 2006
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+ */
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+
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+#include <asm/uaccess.h>
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+
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+/*
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+ * gzip declarations
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+ */
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+
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+#define OF(args) args
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+#define STATIC static
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+
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+#undef memset
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+#undef memcpy
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+#define memzero(s, n) memset ((s), 0, (n))
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+
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+typedef unsigned char uch;
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+typedef unsigned short ush;
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+typedef unsigned long ulg;
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+
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+#define WSIZE 0x8000 /* Window size must be at least 32k, */
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+ /* and a power of two */
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+
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+static uch *inbuf; /* input buffer */
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+static uch window[WSIZE]; /* Sliding window buffer */
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+
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+static unsigned insize = 0; /* valid bytes in inbuf */
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+static unsigned inptr = 0; /* index of next byte to be processed in inbuf */
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+static unsigned outcnt = 0; /* bytes in output buffer */
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+
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+/* gzip flag byte */
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+#define ASCII_FLAG 0x01 /* bit 0 set: file probably ASCII text */
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+#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
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+#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
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+#define ORIG_NAME 0x08 /* bit 3 set: original file name present */
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+#define COMMENT 0x10 /* bit 4 set: file comment present */
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+#define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
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+#define RESERVED 0xC0 /* bit 6,7: reserved */
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+
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+#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf())
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+
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+/* Diagnostic functions */
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+#ifdef DEBUG
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+# define Assert(cond,msg) {if(!(cond)) error(msg);}
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+# define Trace(x) fprintf x
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+# define Tracev(x) {if (verbose) fprintf x ;}
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+# define Tracevv(x) {if (verbose>1) fprintf x ;}
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+# define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
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+# define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
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+#else
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+# define Assert(cond,msg)
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+# define Trace(x)
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+# define Tracev(x)
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+# define Tracevv(x)
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+# define Tracec(c,x)
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+# define Tracecv(c,x)
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+#endif
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+
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+static int fill_inbuf(void);
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+static void flush_window(void);
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+static void error(char *m);
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+static void gzip_mark(void **);
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+static void gzip_release(void **);
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+
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+extern char input_data[];
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+extern int input_len;
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+
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+static long bytes_out = 0;
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+static uch *output_data;
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+static unsigned long output_ptr = 0;
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+
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+static void *malloc(int size);
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+static void free(void *where);
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+static void error(char *m);
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+static void gzip_mark(void **);
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+static void gzip_release(void **);
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+
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+int puts(const char *);
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+
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+extern int _text; /* Defined in vmlinux.lds.S */
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+extern int _end;
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+static unsigned long free_mem_ptr;
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+static unsigned long free_mem_end_ptr;
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+
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+#define HEAP_SIZE 0x10000
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+
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+#include "../../../../lib/inflate.c"
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+
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+#define SCR *((volatile unsigned char *)0xffff8a)
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+#define TDR *((volatile unsigned char *)0xffff8b)
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+#define SSR *((volatile unsigned char *)0xffff8c)
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+
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+static void *malloc(int size)
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+{
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+ void *p;
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+
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+ if (size <0) error("Malloc error");
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+ if (free_mem_ptr == 0) error("Memory error");
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+
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+ free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */
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+
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+ p = (void *)free_mem_ptr;
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+ free_mem_ptr += size;
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+
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+ if (free_mem_ptr >= free_mem_end_ptr)
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+ error("Out of memory");
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+
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+ return p;
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+}
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+
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+static void free(void *where)
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+{ /* Don't care */
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+}
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+
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+static void gzip_mark(void **ptr)
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+{
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+ *ptr = (void *) free_mem_ptr;
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+}
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+
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+static void gzip_release(void **ptr)
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+{
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+ free_mem_ptr = (long) *ptr;
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+}
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+
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+int puts(const char *s)
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+{
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+ return 0;
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+}
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+
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+void* memset(void* s, int c, size_t n)
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+{
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+ int i;
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+ char *ss = (char*)s;
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+
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+ for (i=0;i<n;i++) ss[i] = c;
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+ return s;
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+}
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+
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+void* memcpy(void* __dest, __const void* __src,
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+ size_t __n)
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+{
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+ int i;
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+ char *d = (char *)__dest, *s = (char *)__src;
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+
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+ for (i=0;i<__n;i++) d[i] = s[i];
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+ return __dest;
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+}
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+
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+/* ===========================================================================
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+ * Fill the input buffer. This is called only when the buffer is empty
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+ * and at least one byte is really needed.
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+ */
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+static int fill_inbuf(void)
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+{
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+ if (insize != 0) {
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+ error("ran out of input data");
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+ }
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+
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+ inbuf = input_data;
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+ insize = input_len;
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+ inptr = 1;
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+ return inbuf[0];
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+}
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+
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+/* ===========================================================================
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+ * Write the output window window[0..outcnt-1] and update crc and bytes_out.
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+ * (Used for the decompressed data only.)
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+ */
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+static void flush_window(void)
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+{
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+ ulg c = crc; /* temporary variable */
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+ unsigned n;
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+ uch *in, *out, ch;
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+
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+ in = window;
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+ out = &output_data[output_ptr];
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+ for (n = 0; n < outcnt; n++) {
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+ ch = *out++ = *in++;
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+ c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
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+ }
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+ crc = c;
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+ bytes_out += (ulg)outcnt;
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+ output_ptr += (ulg)outcnt;
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+ outcnt = 0;
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+}
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+
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+static void error(char *x)
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+{
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+ puts("\n\n");
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+ puts(x);
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+ puts("\n\n -- System halted");
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+
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+ while(1); /* Halt */
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+}
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+
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+#define STACK_SIZE (4096)
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+long user_stack [STACK_SIZE];
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+long* stack_start = &user_stack[STACK_SIZE];
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+
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+void decompress_kernel(void)
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+{
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+ output_data = 0;
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+ output_ptr = (unsigned long)0x400000;
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+ free_mem_ptr = (unsigned long)&_end;
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+ free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
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+
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+ makecrc();
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+ puts("Uncompressing Linux... ");
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+ gunzip();
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+ puts("Ok, booting the kernel.\n");
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+}
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