1 files changed, 329 insertions, 0 deletions

diff --git a/arch/arm/boot/compressed/misc.c b/arch/arm/boot/compressed/misc.c
new file mode 100644
index 000000000000..23434b56786a
--- /dev/null
+++ b/arch/arm/boot/compressed/misc.c
@@ -0,0 +1,329 @@
+/*
+ * 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
+ *
+ * Modified for ARM Linux by Russell King
+ *
+ * Nicolas Pitre <nico@visuaide.com>  1999/04/14 :
+ *  For this code to run directly from Flash, all constant variables must
+ *  be marked with 'const' and all other variables initialized at run-time 
+ *  only.  This way all non constant variables will end up in the bss segment,
+ *  which should point to addresses in RAM and cleared to 0 on start.
+ *  This allows for a much quicker boot time.
+ */
+
+unsigned int __machine_arch_type;
+
+#include <linux/string.h>
+
+#include <asm/arch/uncompress.h>
+
+#ifdef STANDALONE_DEBUG
+#define putstr printf
+#endif
+
+#ifdef CONFIG_DEBUG_ICEDCC
+#define putstr icedcc_putstr
+#define putc icedcc_putc
+
+extern void idedcc_putc(int ch);
+
+static void
+icedcc_putstr(const char *ptr)
+{
+        for (; *ptr != '\0'; ptr++) {
+                icedcc_putc(*ptr);
+        }
+}
+
+#endif
+
+#define __ptr_t void *
+
+/*
+ * Optimised C version of memzero for the ARM.
+ */
+void __memzero (__ptr_t s, size_t n)
+{
+        union { void *vp; unsigned long *ulp; unsigned char *ucp; } u;
+        int i;
+
+        u.vp = s;
+
+        for (i = n >> 5; i > 0; i--) {
+                *u.ulp++ = 0;
+                *u.ulp++ = 0;
+                *u.ulp++ = 0;
+                *u.ulp++ = 0;
+                *u.ulp++ = 0;
+                *u.ulp++ = 0;
+                *u.ulp++ = 0;
+                *u.ulp++ = 0;
+        }
+
+        if (n & 1 << 4) {
+                *u.ulp++ = 0;
+                *u.ulp++ = 0;
+                *u.ulp++ = 0;
+                *u.ulp++ = 0;
+        }
+
+        if (n & 1 << 3) {
+                *u.ulp++ = 0;
+                *u.ulp++ = 0;
+        }
+
+        if (n & 1 << 2)
+                *u.ulp++ = 0;
+
+        if (n & 1 << 1) {
+                *u.ucp++ = 0;
+                *u.ucp++ = 0;
+        }
+
+        if (n & 1)
+                *u.ucp++ = 0;
+}
+
+static inline __ptr_t memcpy(__ptr_t __dest, __const __ptr_t __src,
+                            size_t __n)
+{
+        int i = 0;
+        unsigned char *d = (unsigned char *)__dest, *s = (unsigned char *)__src;
+
+        for (i = __n >> 3; i > 0; i--) {
+                *d++ = *s++;
+                *d++ = *s++;
+                *d++ = *s++;
+                *d++ = *s++;
+                *d++ = *s++;
+                *d++ = *s++;
+                *d++ = *s++;
+                *d++ = *s++;
+        }
+
+        if (__n & 1 << 2) {
+                *d++ = *s++;
+                *d++ = *s++;
+                *d++ = *s++;
+                *d++ = *s++;
+        }
+
+        if (__n & 1 << 1) {
+                *d++ = *s++;
+                *d++ = *s++;
+        }
+
+        if (__n & 1)
+                *d++ = *s++;
+
+        return __dest;
+}
+
+/*
+ * gzip delarations
+ */
+#define OF(args)  args
+#define STATIC static
+
+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;         /* valid bytes in inbuf */
+static unsigned inptr;          /* index of next byte to be processed in inbuf */
+static unsigned outcnt;         /* 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 char input_data_end[];
+
+static uch *output_data;
+static ulg output_ptr;
+static ulg bytes_out;
+
+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 putstr(const char *);
+
+extern int end;
+static ulg free_mem_ptr;
+static ulg free_mem_ptr_end;
+
+#define HEAP_SIZE 0x2000
+
+#include "../../../../lib/inflate.c"
+
+#ifndef STANDALONE_DEBUG
+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_ptr_end)
+                error("Out of memory");
+        return p;
+}
+
+static void free(void *where)
+{ /* gzip_mark & gzip_release do the free */
+}
+
+static void gzip_mark(void **ptr)
+{
+        arch_decomp_wdog();
+        *ptr = (void *) free_mem_ptr;
+}
+
+static void gzip_release(void **ptr)
+{
+        arch_decomp_wdog();
+        free_mem_ptr = (long) *ptr;
+}
+#else
+static void gzip_mark(void **ptr)
+{
+}
+
+static void gzip_release(void **ptr)
+{
+}
+#endif
+
+/* ===========================================================================
+ * Fill the input buffer. This is called only when the buffer is empty
+ * and at least one byte is really needed.
+ */
+int fill_inbuf(void)
+{
+        if (insize != 0)
+                error("ran out of input data");
+
+        inbuf = input_data;
+        insize = &input_data_end[0] - &input_data[0];
+
+        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.)
+ */
+void flush_window(void)
+{
+        ulg c = crc;
+        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;
+        putstr(".");
+}
+
+static void error(char *x)
+{
+        putstr("\n\n");
+        putstr(x);
+        putstr("\n\n -- System halted");
+
+        while(1);       /* Halt */
+}
+
+#ifndef STANDALONE_DEBUG
+
+ulg
+decompress_kernel(ulg output_start, ulg free_mem_ptr_p, ulg free_mem_ptr_end_p,
+                  int arch_id)
+{
+        output_data             = (uch *)output_start;  /* Points to kernel start */
+        free_mem_ptr            = free_mem_ptr_p;
+        free_mem_ptr_end        = free_mem_ptr_end_p;
+        __machine_arch_type     = arch_id;
+
+        arch_decomp_setup();
+
+        makecrc();
+        putstr("Uncompressing Linux...");
+        gunzip();
+        putstr(" done, booting the kernel.\n");
+        return output_ptr;
+}
+#else
+
+char output_buffer[1500*1024];
+
+int main()
+{
+        output_data = output_buffer;
+
+        makecrc();
+        putstr("Uncompressing Linux...");
+        gunzip();
+        putstr("done.\n");
+        return 0;
+}
+#endif
+