4 * This is a collection of several routines from gzip-1.0.3
7 * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
8 * puts by Nick Holloway 1993, better puts by Martin Mares 1995
9 * adaptation for Linux/CRIS Axis Communications AB, 1999
13 /* where the piggybacked kernel image expects itself to live.
14 * it is the same address we use when we network load an uncompressed
15 * image into DRAM, and it is the address the kernel is linked to live
19 #define KERNEL_LOAD_ADR 0x40004000
22 #include <linux/types.h>
23 #include <asm/arch/svinto.h>
32 void* memset(void* s, int c, size_t n);
33 void* memcpy(void* __dest, __const void* __src, size_t __n);
35 #define memzero(s, n) memset ((s), 0, (n))
38 typedef unsigned char uch;
39 typedef unsigned short ush;
40 typedef unsigned long ulg;
42 #define WSIZE 0x8000 /* Window size must be at least 32k, */
43 /* and a power of two */
45 static uch *inbuf; /* input buffer */
46 static uch window[WSIZE]; /* Sliding window buffer */
48 unsigned inptr = 0; /* index of next byte to be processed in inbuf
49 * After decompression it will contain the
50 * compressed size, and head.S will read it.
53 static unsigned outcnt = 0; /* bytes in output buffer */
56 #define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
57 #define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
58 #define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
59 #define ORIG_NAME 0x08 /* bit 3 set: original file name present */
60 #define COMMENT 0x10 /* bit 4 set: file comment present */
61 #define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
62 #define RESERVED 0xC0 /* bit 6,7: reserved */
64 #define get_byte() inbuf[inptr++]
66 /* Diagnostic functions */
68 # define Assert(cond,msg) {if(!(cond)) error(msg);}
69 # define Trace(x) fprintf x
70 # define Tracev(x) {if (verbose) fprintf x ;}
71 # define Tracevv(x) {if (verbose>1) fprintf x ;}
72 # define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
73 # define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
75 # define Assert(cond,msg)
83 static void flush_window(void);
84 static void error(char *m);
86 extern char *input_data; /* lives in head.S */
88 static long bytes_out = 0;
89 static uch *output_data;
90 static unsigned long output_ptr = 0;
92 static void *malloc(int size);
93 static void free(void *where);
94 static void gzip_mark(void **);
95 static void gzip_release(void **);
97 static void puts(const char *);
99 /* the "heap" is put directly after the BSS ends, at end */
102 static long free_mem_ptr = (long)&_end;
104 #include "../../../../../lib/inflate.c"
106 static void *malloc(int size)
110 if (size <0) error("Malloc error");
112 free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */
114 p = (void *)free_mem_ptr;
115 free_mem_ptr += size;
120 static void free(void *where)
124 static void gzip_mark(void **ptr)
126 *ptr = (void *) free_mem_ptr;
129 static void gzip_release(void **ptr)
131 free_mem_ptr = (long) *ptr;
134 /* decompressor info and error messages to serial console */
139 #ifndef CONFIG_ETRAX_DEBUG_PORT_NULL
141 #ifdef CONFIG_ETRAX_DEBUG_PORT0
142 while(!(*R_SERIAL0_STATUS & (1 << 5))) ;
143 *R_SERIAL0_TR_DATA = *s++;
145 #ifdef CONFIG_ETRAX_DEBUG_PORT1
146 while(!(*R_SERIAL1_STATUS & (1 << 5))) ;
147 *R_SERIAL1_TR_DATA = *s++;
149 #ifdef CONFIG_ETRAX_DEBUG_PORT2
150 while(!(*R_SERIAL2_STATUS & (1 << 5))) ;
151 *R_SERIAL2_TR_DATA = *s++;
153 #ifdef CONFIG_ETRAX_DEBUG_PORT3
154 while(!(*R_SERIAL3_STATUS & (1 << 5))) ;
155 *R_SERIAL3_TR_DATA = *s++;
162 memset(void* s, int c, size_t n)
167 for (i=0;i<n;i++) ss[i] = c;
173 memcpy(void* __dest, __const void* __src,
177 char *d = (char *)__dest, *s = (char *)__src;
179 for (i=0;i<__n;i++) d[i] = s[i];
184 /* ===========================================================================
185 * Write the output window window[0..outcnt-1] and update crc and bytes_out.
186 * (Used for the decompressed data only.)
192 ulg c = crc; /* temporary variable */
197 out = &output_data[output_ptr];
198 for (n = 0; n < outcnt; n++) {
200 c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
203 bytes_out += (ulg)outcnt;
204 output_ptr += (ulg)outcnt;
213 puts("\n\n -- System halted\n");
218 void setup_normal_output_buffer(void)
220 output_data = (char *)KERNEL_LOAD_ADR;
223 void decompress_kernel(void)
227 /* input_data is set in head.S */
230 #ifdef CONFIG_ETRAX_DEBUG_PORT0
232 *R_SERIAL0_BAUD = 0x99;
233 *R_SERIAL0_TR_CTRL = 0x40;
235 #ifdef CONFIG_ETRAX_DEBUG_PORT1
237 *R_SERIAL1_BAUD = 0x99;
238 *R_SERIAL1_TR_CTRL = 0x40;
240 #ifdef CONFIG_ETRAX_DEBUG_PORT2
241 *R_GEN_CONFIG = 0x08;
243 *R_SERIAL2_BAUD = 0x99;
244 *R_SERIAL2_TR_CTRL = 0x40;
246 #ifdef CONFIG_ETRAX_DEBUG_PORT3
247 *R_GEN_CONFIG = 0x100;
249 *R_SERIAL3_BAUD = 0x99;
250 *R_SERIAL3_TR_CTRL = 0x40;
253 setup_normal_output_buffer();
257 __asm__ volatile ("move $vr,%0" : "=rm" (revision));
260 puts("You need an ETRAX 100LX to run linux 2.6\n");
264 puts("Uncompressing Linux...\n");
266 puts("Done. Now booting the kernel.\n");