2 * arch/h8300/boot/compressed/misc.c
4 * This is a collection of several routines from gzip-1.0.3
7 * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
9 * Adapted for h8300 by Yoshinori Sato 2006
12 #include <asm/uaccess.h>
23 #define memzero(s, n) memset ((s), 0, (n))
25 typedef unsigned char uch;
26 typedef unsigned short ush;
27 typedef unsigned long ulg;
29 #define WSIZE 0x8000 /* Window size must be at least 32k, */
30 /* and a power of two */
32 static uch *inbuf; /* input buffer */
33 static uch window[WSIZE]; /* Sliding window buffer */
35 static unsigned insize = 0; /* valid bytes in inbuf */
36 static unsigned inptr = 0; /* index of next byte to be processed in inbuf */
37 static unsigned outcnt = 0; /* bytes in output buffer */
40 #define ASCII_FLAG 0x01 /* bit 0 set: file probably ASCII text */
41 #define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
42 #define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
43 #define ORIG_NAME 0x08 /* bit 3 set: original file name present */
44 #define COMMENT 0x10 /* bit 4 set: file comment present */
45 #define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
46 #define RESERVED 0xC0 /* bit 6,7: reserved */
48 #define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf())
50 /* Diagnostic functions */
52 # define Assert(cond,msg) {if(!(cond)) error(msg);}
53 # define Trace(x) fprintf x
54 # define Tracev(x) {if (verbose) fprintf x ;}
55 # define Tracevv(x) {if (verbose>1) fprintf x ;}
56 # define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
57 # define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
59 # define Assert(cond,msg)
67 static int fill_inbuf(void);
68 static void flush_window(void);
69 static void error(char *m);
71 extern char input_data[];
74 static long bytes_out = 0;
75 static uch *output_data;
76 static unsigned long output_ptr = 0;
78 static void error(char *m);
80 int puts(const char *);
83 static unsigned long free_mem_ptr;
84 static unsigned long free_mem_end_ptr;
86 #define HEAP_SIZE 0x10000
88 #include "../../../../lib/inflate.c"
90 #define SCR *((volatile unsigned char *)0xffff8a)
91 #define TDR *((volatile unsigned char *)0xffff8b)
92 #define SSR *((volatile unsigned char *)0xffff8c)
94 int puts(const char *s)
99 void* memset(void* s, int c, size_t n)
104 for (i=0;i<n;i++) ss[i] = c;
108 void* memcpy(void* __dest, __const void* __src,
112 char *d = (char *)__dest, *s = (char *)__src;
114 for (i=0;i<__n;i++) d[i] = s[i];
118 /* ===========================================================================
119 * Fill the input buffer. This is called only when the buffer is empty
120 * and at least one byte is really needed.
122 static int fill_inbuf(void)
125 error("ran out of input data");
134 /* ===========================================================================
135 * Write the output window window[0..outcnt-1] and update crc and bytes_out.
136 * (Used for the decompressed data only.)
138 static void flush_window(void)
140 ulg c = crc; /* temporary variable */
145 out = &output_data[output_ptr];
146 for (n = 0; n < outcnt; n++) {
148 c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
151 bytes_out += (ulg)outcnt;
152 output_ptr += (ulg)outcnt;
156 static void error(char *x)
160 puts("\n\n -- System halted");
165 #define STACK_SIZE (4096)
166 long user_stack [STACK_SIZE];
167 long* stack_start = &user_stack[STACK_SIZE];
169 void decompress_kernel(void)
172 output_ptr = (unsigned long)0x400000;
173 free_mem_ptr = (unsigned long)&_end;
174 free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
177 puts("Uncompressing Linux... ");
179 puts("Ok, booting the kernel.\n");