4 * This is a collection of several routines from gzip-1.0.3
7 * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
9 * Modified for ARM Linux by Russell King
11 * Nicolas Pitre <nico@visuaide.com> 1999/04/14 :
12 * For this code to run directly from Flash, all constant variables must
13 * be marked with 'const' and all other variables initialized at run-time
14 * only. This way all non constant variables will end up in the bss segment,
15 * which should point to addresses in RAM and cleared to 0 on start.
16 * This allows for a much quicker boot time.
19 unsigned int __machine_arch_type;
21 #include <linux/string.h>
23 #ifdef STANDALONE_DEBUG
27 static void putstr(const char *ptr);
29 #include <linux/compiler.h>
30 #include <asm/arch/uncompress.h>
32 #ifdef CONFIG_DEBUG_ICEDCC
36 static void icedcc_putc(int ch)
38 int status, i = 0x4000000;
44 asm volatile ("mrc p14, 0, %0, c0, c1, 0" : "=r" (status));
45 } while (status & (1 << 29));
47 asm("mcr p14, 0, %0, c0, c5, 0" : : "r" (ch));
52 static void icedcc_putc(int ch)
54 int status, i = 0x4000000;
60 asm volatile ("mrc p14, 0, %0, c0, c0, 0" : "=r" (status));
63 asm("mcr p14, 0, %0, c1, c0, 0" : : "r" (ch));
68 #define putc(ch) icedcc_putc(ch)
69 #define flush() do { } while (0)
72 static void putstr(const char *ptr)
76 while ((c = *ptr++) != '\0') {
87 #define __ptr_t void *
90 * Optimised C version of memzero for the ARM.
92 void __memzero (__ptr_t s, size_t n)
94 union { void *vp; unsigned long *ulp; unsigned char *ucp; } u;
99 for (i = n >> 5; i > 0; i--) {
134 static inline __ptr_t memcpy(__ptr_t __dest, __const __ptr_t __src,
138 unsigned char *d = (unsigned char *)__dest, *s = (unsigned char *)__src;
140 for (i = __n >> 3; i > 0; i--) {
172 #define OF(args) args
173 #define STATIC static
175 typedef unsigned char uch;
176 typedef unsigned short ush;
177 typedef unsigned long ulg;
179 #define WSIZE 0x8000 /* Window size must be at least 32k, */
180 /* and a power of two */
182 static uch *inbuf; /* input buffer */
183 static uch window[WSIZE]; /* Sliding window buffer */
185 static unsigned insize; /* valid bytes in inbuf */
186 static unsigned inptr; /* index of next byte to be processed in inbuf */
187 static unsigned outcnt; /* bytes in output buffer */
190 #define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
191 #define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
192 #define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
193 #define ORIG_NAME 0x08 /* bit 3 set: original file name present */
194 #define COMMENT 0x10 /* bit 4 set: file comment present */
195 #define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
196 #define RESERVED 0xC0 /* bit 6,7: reserved */
198 #define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf())
200 /* Diagnostic functions */
202 # define Assert(cond,msg) {if(!(cond)) error(msg);}
203 # define Trace(x) fprintf x
204 # define Tracev(x) {if (verbose) fprintf x ;}
205 # define Tracevv(x) {if (verbose>1) fprintf x ;}
206 # define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
207 # define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
209 # define Assert(cond,msg)
214 # define Tracecv(c,x)
217 static int fill_inbuf(void);
218 static void flush_window(void);
219 static void error(char *m);
220 static void gzip_mark(void **);
221 static void gzip_release(void **);
223 extern char input_data[];
224 extern char input_data_end[];
226 static uch *output_data;
227 static ulg output_ptr;
228 static ulg bytes_out;
230 static void *malloc(int size);
231 static void free(void *where);
232 static void error(char *m);
233 static void gzip_mark(void **);
234 static void gzip_release(void **);
236 static void putstr(const char *);
239 static ulg free_mem_ptr;
240 static ulg free_mem_ptr_end;
242 #define HEAP_SIZE 0x2000
244 #include "../../../../lib/inflate.c"
246 #ifndef STANDALONE_DEBUG
247 static void *malloc(int size)
251 if (size <0) error("Malloc error");
252 if (free_mem_ptr <= 0) error("Memory error");
254 free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */
256 p = (void *)free_mem_ptr;
257 free_mem_ptr += size;
259 if (free_mem_ptr >= free_mem_ptr_end)
260 error("Out of memory");
264 static void free(void *where)
265 { /* gzip_mark & gzip_release do the free */
268 static void gzip_mark(void **ptr)
271 *ptr = (void *) free_mem_ptr;
274 static void gzip_release(void **ptr)
277 free_mem_ptr = (long) *ptr;
280 static void gzip_mark(void **ptr)
284 static void gzip_release(void **ptr)
289 /* ===========================================================================
290 * Fill the input buffer. This is called only when the buffer is empty
291 * and at least one byte is really needed.
296 error("ran out of input data");
299 insize = &input_data_end[0] - &input_data[0];
305 /* ===========================================================================
306 * Write the output window window[0..outcnt-1] and update crc and bytes_out.
307 * (Used for the decompressed data only.)
309 void flush_window(void)
316 out = &output_data[output_ptr];
317 for (n = 0; n < outcnt; n++) {
319 c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
322 bytes_out += (ulg)outcnt;
323 output_ptr += (ulg)outcnt;
329 #define arch_error(x)
332 static void error(char *x)
338 putstr("\n\n -- System halted");
343 #ifndef STANDALONE_DEBUG
346 decompress_kernel(ulg output_start, ulg free_mem_ptr_p, ulg free_mem_ptr_end_p,
349 output_data = (uch *)output_start; /* Points to kernel start */
350 free_mem_ptr = free_mem_ptr_p;
351 free_mem_ptr_end = free_mem_ptr_end_p;
352 __machine_arch_type = arch_id;
357 putstr("Uncompressing Linux...");
359 putstr(" done, booting the kernel.\n");
364 char output_buffer[1500*1024];
368 output_data = output_buffer;
371 putstr("Uncompressing Linux...");