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/compiler.h> /* for inline */
22 #include <linux/types.h> /* for size_t */
23 #include <linux/stddef.h> /* for NULL */
24 #include <asm/string.h>
26 #ifdef STANDALONE_DEBUG
30 static void putstr(const char *ptr);
32 #include <linux/compiler.h>
33 #include <mach/uncompress.h>
35 #ifdef CONFIG_DEBUG_ICEDCC
39 static void icedcc_putc(int ch)
41 int status, i = 0x4000000;
47 asm volatile ("mrc p14, 0, %0, c0, c1, 0" : "=r" (status));
48 } while (status & (1 << 29));
50 asm("mcr p14, 0, %0, c0, c5, 0" : : "r" (ch));
52 #elif defined(CONFIG_CPU_XSCALE)
54 static void icedcc_putc(int ch)
56 int status, i = 0x4000000;
62 asm volatile ("mrc p14, 0, %0, c14, c0, 0" : "=r" (status));
63 } while (status & (1 << 28));
65 asm("mcr p14, 0, %0, c8, c0, 0" : : "r" (ch));
70 static void icedcc_putc(int ch)
72 int status, i = 0x4000000;
78 asm volatile ("mrc p14, 0, %0, c0, c0, 0" : "=r" (status));
81 asm("mcr p14, 0, %0, c1, c0, 0" : : "r" (ch));
86 #define putc(ch) icedcc_putc(ch)
87 #define flush() do { } while (0)
90 static void putstr(const char *ptr)
94 while ((c = *ptr++) != '\0') {
105 #define __ptr_t void *
107 #define memzero(s,n) __memzero(s,n)
110 * Optimised C version of memzero for the ARM.
112 void __memzero (__ptr_t s, size_t n)
114 union { void *vp; unsigned long *ulp; unsigned char *ucp; } u;
119 for (i = n >> 5; i > 0; i--) {
154 static inline __ptr_t memcpy(__ptr_t __dest, __const __ptr_t __src,
158 unsigned char *d = (unsigned char *)__dest, *s = (unsigned char *)__src;
160 for (i = __n >> 3; i > 0; i--) {
192 #define OF(args) args
193 #define STATIC static
195 typedef unsigned char uch;
196 typedef unsigned short ush;
197 typedef unsigned long ulg;
199 #define WSIZE 0x8000 /* Window size must be at least 32k, */
200 /* and a power of two */
202 static uch *inbuf; /* input buffer */
203 static uch window[WSIZE]; /* Sliding window buffer */
205 static unsigned insize; /* valid bytes in inbuf */
206 static unsigned inptr; /* index of next byte to be processed in inbuf */
207 static unsigned outcnt; /* bytes in output buffer */
210 #define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
211 #define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
212 #define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
213 #define ORIG_NAME 0x08 /* bit 3 set: original file name present */
214 #define COMMENT 0x10 /* bit 4 set: file comment present */
215 #define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
216 #define RESERVED 0xC0 /* bit 6,7: reserved */
218 #define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf())
220 /* Diagnostic functions */
222 # define Assert(cond,msg) {if(!(cond)) error(msg);}
223 # define Trace(x) fprintf x
224 # define Tracev(x) {if (verbose) fprintf x ;}
225 # define Tracevv(x) {if (verbose>1) fprintf x ;}
226 # define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
227 # define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
229 # define Assert(cond,msg)
234 # define Tracecv(c,x)
237 static int fill_inbuf(void);
238 static void flush_window(void);
239 static void error(char *m);
241 extern char input_data[];
242 extern char input_data_end[];
244 static uch *output_data;
245 static ulg output_ptr;
246 static ulg bytes_out;
248 static void error(char *m);
250 static void putstr(const char *);
253 static ulg free_mem_ptr;
254 static ulg free_mem_end_ptr;
256 #ifdef STANDALONE_DEBUG
257 #define NO_INFLATE_MALLOC
260 #define ARCH_HAS_DECOMP_WDOG
262 #include "../../../../lib/inflate.c"
264 /* ===========================================================================
265 * Fill the input buffer. This is called only when the buffer is empty
266 * and at least one byte is really needed.
271 error("ran out of input data");
274 insize = &input_data_end[0] - &input_data[0];
280 /* ===========================================================================
281 * Write the output window window[0..outcnt-1] and update crc and bytes_out.
282 * (Used for the decompressed data only.)
284 void flush_window(void)
291 out = &output_data[output_ptr];
292 for (n = 0; n < outcnt; n++) {
294 c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
297 bytes_out += (ulg)outcnt;
298 output_ptr += (ulg)outcnt;
304 #define arch_error(x)
307 static void error(char *x)
313 putstr("\n\n -- System halted");
318 #ifndef STANDALONE_DEBUG
321 decompress_kernel(ulg output_start, ulg free_mem_ptr_p, ulg free_mem_ptr_end_p,
324 output_data = (uch *)output_start; /* Points to kernel start */
325 free_mem_ptr = free_mem_ptr_p;
326 free_mem_end_ptr = free_mem_ptr_end_p;
327 __machine_arch_type = arch_id;
332 putstr("Uncompressing Linux...");
334 putstr(" done, booting the kernel.\n");
339 char output_buffer[1500*1024];
343 output_data = output_buffer;
346 putstr("Uncompressing Linux...");