1 files changed, 240 insertions, 0 deletions

diff --git a/arch/sh/boot/compressed/misc.c b/arch/sh/boot/compressed/misc.c
new file mode 100644
index 000000000000..211e9110074f
--- /dev/null
+++ b/arch/sh/boot/compressed/misc.c
@@ -0,0 +1,240 @@
+/*
+ * arch/sh/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 SH by Stuart Menefy, Aug 1999
+ *
+ * Modified to use standard LinuxSH BIOS by Greg Banks 7Jul2000
+ */
+
+#include <linux/config.h>
+#include <asm/uaccess.h>
+#ifdef CONFIG_SH_STANDARD_BIOS
+#include <asm/sh_bios.h>
+#endif
+
+/*
+ * 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 **);
+
+int 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");
+        if (free_mem_ptr == 0) error("Memory error");
+
+        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("Out of memory");
+
+        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;
+}
+
+#ifdef CONFIG_SH_STANDARD_BIOS
+size_t strlen(const char *s)
+{
+        int i = 0;
+
+        while (*s++)
+                i++;
+        return i;
+}
+
+int puts(const char *s)
+{
+        int len = strlen(s);
+        sh_bios_console_write(s, len);
+        return len;
+}
+#else
+int puts(const char *s)
+{
+        /* This should be updated to use the sh-sci routines */
+        return 0;
+}
+#endif
+
+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");
+        }
+
+        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;
+}
+
+static void error(char *x)
+{
+        puts("\n\n");
+        puts(x);
+        puts("\n\n -- System halted");
+
+        while(1);       /* Halt */
+}
+
+#define STACK_SIZE (4096)
+long user_stack [STACK_SIZE];
+long* stack_start = &user_stack[STACK_SIZE];
+
+void decompress_kernel(void)
+{
+        output_data = 0;
+        output_ptr = (unsigned long)&_text+0x20001000;
+        free_mem_ptr = (unsigned long)&_end;
+        free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
+
+        makecrc();
+        puts("Uncompressing Linux... ");
+        gunzip();
+        puts("Ok, booting the kernel.\n");
+}