arm: add support for LZO-compressed kernels

[pandora-kernel.git] / arch / arm / boot / compressed / misc.c

diff --git a/arch/arm/boot/compressed/misc.c b/arch/arm/boot/compressed/misc.c
index 17153b5..7e0fe4d 100644 (file)
--- a/arch/arm/boot/compressed/misc.c
+++ b/arch/arm/boot/compressed/misc.c
@@ -18,10 +18,15 @@
 
 unsigned int __machine_arch_type;
 
+#define _LINUX_STRING_H_
+
 #include <linux/compiler.h>    /* for inline */
 #include <linux/types.h>       /* for size_t */
 #include <linux/stddef.h>      /* for NULL */
 #include <asm/string.h>
+#include <linux/linkage.h>
+
+#include <asm/unaligned.h>
 
 #ifdef STANDALONE_DEBUG
 #define putstr printf
@@ -188,34 +193,8 @@ static inline __ptr_t memcpy(__ptr_t __dest, __const __ptr_t __src,
 /*
  * 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);}
@@ -233,24 +212,20 @@ static unsigned outcnt;           /* bytes in output buffer */
 #  define Tracecv(c,x)
 #endif
 
-static int  fill_inbuf(void);
-static void flush_window(void);
 static void error(char *m);
 
 extern char input_data[];
 extern char input_data_end[];
 
-static uch *output_data;
-static ulg output_ptr;
-static ulg bytes_out;
+static unsigned char *output_data;
+static unsigned long output_ptr;
 
 static void error(char *m);
 
 static void putstr(const char *);
 
-extern int end;
-static ulg free_mem_ptr;
-static ulg free_mem_end_ptr;
+static unsigned long free_mem_ptr;
+static unsigned long free_mem_end_ptr;
 
 #ifdef STANDALONE_DEBUG
 #define NO_INFLATE_MALLOC
@@ -258,46 +233,13 @@ static ulg free_mem_end_ptr;
 
 #define ARCH_HAS_DECOMP_WDOG
 
-#include "../../../../lib/inflate.c"
-
-/* ===========================================================================
- * 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];
-}
+#ifdef CONFIG_KERNEL_GZIP
+#include "../../../../lib/decompress_inflate.c"
+#endif
 
-/* ===========================================================================
- * 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(".");
-}
+#ifdef CONFIG_KERNEL_LZO
+#include "../../../../lib/decompress_unlzo.c"
+#endif
 
 #ifndef arch_error
 #define arch_error(x)
@@ -314,22 +256,33 @@ static void error(char *x)
        while(1);       /* Halt */
 }
 
+asmlinkage void __div0(void)
+{
+       error("Attempting division by 0!");
+}
+
 #ifndef STANDALONE_DEBUG
 
-ulg
-decompress_kernel(ulg output_start, ulg free_mem_ptr_p, ulg free_mem_ptr_end_p,
-                 int arch_id)
+unsigned long
+decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p,
+               unsigned long free_mem_ptr_end_p,
+               int arch_id)
 {
-       output_data             = (uch *)output_start;  /* Points to kernel start */
+       unsigned char *tmp;
+
+       output_data             = (unsigned char *)output_start;
        free_mem_ptr            = free_mem_ptr_p;
        free_mem_end_ptr        = free_mem_ptr_end_p;
        __machine_arch_type     = arch_id;
 
        arch_decomp_setup();
 
-       makecrc();
+       tmp = (unsigned char *) (((unsigned long)input_data_end) - 4);
+       output_ptr = get_unaligned_le32(tmp);
+
        putstr("Uncompressing Linux...");
-       gunzip();
+       decompress(input_data, input_data_end - input_data,
+                       NULL, NULL, output_data, NULL, error);
        putstr(" done, booting the kernel.\n");
        return output_ptr;
 }
@@ -341,11 +294,10 @@ int main()
 {
        output_data = output_buffer;
 
-       makecrc();
        putstr("Uncompressing Linux...");
-       gunzip();
+       decompress(input_data, input_data_end - input_data,
+                       NULL, NULL, output_data, NULL, error);
        putstr("done.\n");
        return 0;
 }
 #endif
-