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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 | /* * misc.c * * $Id: misc.c,v 1.8 2005/04/24 18:34:29 starvik Exp $ * * This is a collection of several routines from gzip-1.0.3 * adapted for Linux. * * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994 * puts by Nick Holloway 1993, better puts by Martin Mares 1995 * adoptation for Linux/CRIS Axis Communications AB, 1999 * */ /* where the piggybacked kernel image expects itself to live. * it is the same address we use when we network load an uncompressed * image into DRAM, and it is the address the kernel is linked to live * at by vmlinux.lds.S */ #define KERNEL_LOAD_ADR 0x40004000 #include <linux/config.h> #include <linux/types.h> #include <asm/arch/hwregs/reg_rdwr.h> #include <asm/arch/hwregs/reg_map.h> #include <asm/arch/hwregs/ser_defs.h> /* * gzip declarations */ #define OF(args) args #define STATIC static void* memset(void* s, int c, size_t n); void* memcpy(void* __dest, __const void* __src, size_t __n); #define memzero(s, n) memset ((s), 0, (n)) 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 */ unsigned inptr = 0; /* index of next byte to be processed in inbuf * After decompression it will contain the * compressed size, and head.S will read it. */ static unsigned outcnt = 0; /* 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() inbuf[inptr++] /* Diagnostic functions */ #ifdef DEBUG # define Assert(cond,msg) {if(!(cond)) error(msg);} # define Trace(x) fprintf x # define Tracev(x) {if (verbose) fprintf x ;} # define Tracevv(x) {if (verbose>1) fprintf x ;} # define Tracec(c,x) {if (verbose && (c)) fprintf x ;} # define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;} #else # define Assert(cond,msg) # define Trace(x) # define Tracev(x) # define Tracevv(x) # define Tracec(c,x) # define Tracecv(c,x) #endif static int fill_inbuf(void); static void flush_window(void); static void error(char *m); static void gzip_mark(void **); static void gzip_release(void **); extern char *input_data; /* lives in head.S */ static long bytes_out = 0; static uch *output_data; static unsigned long output_ptr = 0; static void *malloc(int size); static void free(void *where); static void error(char *m); static void gzip_mark(void **); static void gzip_release(void **); static void puts(const char *); /* the "heap" is put directly after the BSS ends, at end */ extern int _end; static long free_mem_ptr = (long)&_end; #include "../../../../../lib/inflate.c" static void *malloc(int size) { void *p; if (size <0) error("Malloc error"); free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */ p = (void *)free_mem_ptr; free_mem_ptr += size; return p; } static void free(void *where) { /* Don't care */ } static void gzip_mark(void **ptr) { *ptr = (void *) free_mem_ptr; } static void gzip_release(void **ptr) { free_mem_ptr = (long) *ptr; } /* decompressor info and error messages to serial console */ static inline void serout(const char *s, reg_scope_instances regi_ser) { reg_ser_rs_stat_din rs; reg_ser_rw_dout dout = {.data = *s}; do { rs = REG_RD(ser, regi_ser, rs_stat_din); } while (!rs.tr_rdy);/* Wait for tranceiver. */ REG_WR(ser, regi_ser, rw_dout, dout); } static void puts(const char *s) { #ifndef CONFIG_ETRAX_DEBUG_PORT_NULL while (*s) { #ifdef CONFIG_ETRAX_DEBUG_PORT0 serout(s, regi_ser0); #endif #ifdef CONFIG_ETRAX_DEBUG_PORT1 serout(s, regi_ser1); #endif #ifdef CONFIG_ETRAX_DEBUG_PORT2 serout(s, regi_ser2); #endif #ifdef CONFIG_ETRAX_DEBUG_PORT3 serout(s, regi_ser3); #endif *s++; } /* CONFIG_ETRAX_DEBUG_PORT_NULL */ #endif } void* memset(void* s, int c, size_t n) { int i; char *ss = (char*)s; for (i=0;i<n;i++) ss[i] = c; } void* memcpy(void* __dest, __const void* __src, size_t __n) { int i; char *d = (char *)__dest, *s = (char *)__src; for (i=0;i<__n;i++) d[i] = s[i]; } /* =========================================================================== * Write the output window window[0..outcnt-1] and update crc and bytes_out. * (Used for the decompressed data only.) */ static void flush_window() { ulg c = crc; /* temporary variable */ 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; } static void error(char *x) { puts("\n\n"); puts(x); puts("\n\n -- System halted\n"); while(1); /* Halt */ } void setup_normal_output_buffer() { output_data = (char *)KERNEL_LOAD_ADR; } static inline void serial_setup(reg_scope_instances regi_ser) { reg_ser_rw_xoff xoff; reg_ser_rw_tr_ctrl tr_ctrl; reg_ser_rw_rec_ctrl rec_ctrl; reg_ser_rw_tr_baud_div tr_baud; reg_ser_rw_rec_baud_div rec_baud; /* Turn off XOFF. */ xoff = REG_RD(ser, regi_ser, rw_xoff); xoff.chr = 0; xoff.automatic = regk_ser_no; REG_WR(ser, regi_ser, rw_xoff, xoff); /* Set baudrate and stopbits. */ tr_ctrl = REG_RD(ser, regi_ser, rw_tr_ctrl); rec_ctrl = REG_RD(ser, regi_ser, rw_rec_ctrl); tr_baud = REG_RD(ser, regi_ser, rw_tr_baud_div); rec_baud = REG_RD(ser, regi_ser, rw_rec_baud_div); tr_ctrl.stop_bits = 1; /* 2 stop bits. */ /* * The baudrate setup is a bit fishy, but in the end the tranceiver is * set to 4800 and the receiver to 115200. The magic value is * 29.493 MHz. */ tr_ctrl.base_freq = regk_ser_f29_493; rec_ctrl.base_freq = regk_ser_f29_493; tr_baud.div = (29493000 / 8) / 4800; rec_baud.div = (29493000 / 8) / 115200; REG_WR(ser, regi_ser, rw_tr_ctrl, tr_ctrl); REG_WR(ser, regi_ser, rw_tr_baud_div, tr_baud); REG_WR(ser, regi_ser, rw_rec_ctrl, rec_ctrl); REG_WR(ser, regi_ser, rw_rec_baud_div, rec_baud); } void decompress_kernel() { char revision; /* input_data is set in head.S */ inbuf = input_data; #ifdef CONFIG_ETRAX_DEBUG_PORT0 serial_setup(regi_ser0); #endif #ifdef CONFIG_ETRAX_DEBUG_PORT1 serial_setup(regi_ser1); #endif #ifdef CONFIG_ETRAX_DEBUG_PORT2 serial_setup(regi_ser2); #endif #ifdef CONFIG_ETRAX_DEBUG_PORT3 serial_setup(regi_ser3); #endif setup_normal_output_buffer(); makecrc(); __asm__ volatile ("move $vr,%0" : "=rm" (revision)); if (revision < 32) { puts("You need an ETRAX FS to run Linux 2.6/crisv32.\n"); while(1); } puts("Uncompressing Linux...\n"); gunzip(); puts("Done. Now booting the kernel.\n"); } |