--- /dev/null
+/*
+ * 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);
+}
git://git.onelab.eu / linux-2.6.git / blobdiff