4 * $Id: misc.c,v 1.8 2005/04/24 18:34:29 starvik Exp $
6 * This is a collection of several routines from gzip-1.0.3
9 * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
10 * puts by Nick Holloway 1993, better puts by Martin Mares 1995
11 * adoptation for Linux/CRIS Axis Communications AB, 1999
15 /* where the piggybacked kernel image expects itself to live.
16 * it is the same address we use when we network load an uncompressed
17 * image into DRAM, and it is the address the kernel is linked to live
21 #define KERNEL_LOAD_ADR 0x40004000
23 #include <linux/config.h>
25 #include <linux/types.h>
26 #include <asm/arch/hwregs/reg_rdwr.h>
27 #include <asm/arch/hwregs/reg_map.h>
28 #include <asm/arch/hwregs/ser_defs.h>
37 void* memset(void* s, int c, size_t n);
38 void* memcpy(void* __dest, __const void* __src,
41 #define memzero(s, n) memset ((s), 0, (n))
44 typedef unsigned char uch;
45 typedef unsigned short ush;
46 typedef unsigned long ulg;
48 #define WSIZE 0x8000 /* Window size must be at least 32k, */
49 /* and a power of two */
51 static uch *inbuf; /* input buffer */
52 static uch window[WSIZE]; /* Sliding window buffer */
54 unsigned inptr = 0; /* index of next byte to be processed in inbuf
55 * After decompression it will contain the
56 * compressed size, and head.S will read it.
59 static unsigned outcnt = 0; /* bytes in output buffer */
62 #define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
63 #define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
64 #define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
65 #define ORIG_NAME 0x08 /* bit 3 set: original file name present */
66 #define COMMENT 0x10 /* bit 4 set: file comment present */
67 #define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
68 #define RESERVED 0xC0 /* bit 6,7: reserved */
70 #define get_byte() inbuf[inptr++]
72 /* Diagnostic functions */
74 # define Assert(cond,msg) {if(!(cond)) error(msg);}
75 # define Trace(x) fprintf x
76 # define Tracev(x) {if (verbose) fprintf x ;}
77 # define Tracevv(x) {if (verbose>1) fprintf x ;}
78 # define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
79 # define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
81 # define Assert(cond,msg)
89 static int fill_inbuf(void);
90 static void flush_window(void);
91 static void error(char *m);
92 static void gzip_mark(void **);
93 static void gzip_release(void **);
95 extern char *input_data; /* lives in head.S */
97 static long bytes_out = 0;
98 static uch *output_data;
99 static unsigned long output_ptr = 0;
101 static void *malloc(int size);
102 static void free(void *where);
103 static void error(char *m);
104 static void gzip_mark(void **);
105 static void gzip_release(void **);
107 static void puts(const char *);
109 /* the "heap" is put directly after the BSS ends, at end */
112 static long free_mem_ptr = (long)&_end;
114 #include "../../../../../lib/inflate.c"
116 static void *malloc(int size)
120 if (size <0) error("Malloc error");
122 free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */
124 p = (void *)free_mem_ptr;
125 free_mem_ptr += size;
130 static void free(void *where)
134 static void gzip_mark(void **ptr)
136 *ptr = (void *) free_mem_ptr;
139 static void gzip_release(void **ptr)
141 free_mem_ptr = (long) *ptr;
144 /* decompressor info and error messages to serial console */
147 serout(const char *s, reg_scope_instances regi_ser)
149 reg_ser_rs_stat_din rs;
150 reg_ser_rw_dout dout = {.data = *s};
153 rs = REG_RD(ser, regi_ser, rs_stat_din);
155 while (!rs.tr_rdy);/* Wait for tranceiver. */
157 REG_WR(ser, regi_ser, rw_dout, dout);
163 #ifndef CONFIG_ETRAX_DEBUG_PORT_NULL
165 #ifdef CONFIG_ETRAX_DEBUG_PORT0
166 serout(s, regi_ser0);
168 #ifdef CONFIG_ETRAX_DEBUG_PORT1
169 serout(s, regi_ser1);
171 #ifdef CONFIG_ETRAX_DEBUG_PORT2
172 serout(s, regi_ser2);
174 #ifdef CONFIG_ETRAX_DEBUG_PORT3
175 serout(s, regi_ser3);
179 /* CONFIG_ETRAX_DEBUG_PORT_NULL */
184 memset(void* s, int c, size_t n)
189 for (i=0;i<n;i++) ss[i] = c;
193 memcpy(void* __dest, __const void* __src,
197 char *d = (char *)__dest, *s = (char *)__src;
199 for (i=0;i<__n;i++) d[i] = s[i];
202 /* ===========================================================================
203 * Write the output window window[0..outcnt-1] and update crc and bytes_out.
204 * (Used for the decompressed data only.)
210 ulg c = crc; /* temporary variable */
215 out = &output_data[output_ptr];
216 for (n = 0; n < outcnt; n++) {
218 c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
221 bytes_out += (ulg)outcnt;
222 output_ptr += (ulg)outcnt;
231 puts("\n\n -- System halted\n");
237 setup_normal_output_buffer()
239 output_data = (char *)KERNEL_LOAD_ADR;
243 serial_setup(reg_scope_instances regi_ser)
245 reg_ser_rw_xoff xoff;
246 reg_ser_rw_tr_ctrl tr_ctrl;
247 reg_ser_rw_rec_ctrl rec_ctrl;
248 reg_ser_rw_tr_baud_div tr_baud;
249 reg_ser_rw_rec_baud_div rec_baud;
252 xoff = REG_RD(ser, regi_ser, rw_xoff);
255 xoff.automatic = regk_ser_no;
257 REG_WR(ser, regi_ser, rw_xoff, xoff);
259 /* Set baudrate and stopbits. */
260 tr_ctrl = REG_RD(ser, regi_ser, rw_tr_ctrl);
261 rec_ctrl = REG_RD(ser, regi_ser, rw_rec_ctrl);
262 tr_baud = REG_RD(ser, regi_ser, rw_tr_baud_div);
263 rec_baud = REG_RD(ser, regi_ser, rw_rec_baud_div);
265 tr_ctrl.stop_bits = 1; /* 2 stop bits. */
268 * The baudrate setup is a bit fishy, but in the end the tranceiver is
269 * set to 4800 and the receiver to 115200. The magic value is
272 tr_ctrl.base_freq = regk_ser_f29_493;
273 rec_ctrl.base_freq = regk_ser_f29_493;
274 tr_baud.div = (29493000 / 8) / 4800;
275 rec_baud.div = (29493000 / 8) / 115200;
277 REG_WR(ser, regi_ser, rw_tr_ctrl, tr_ctrl);
278 REG_WR(ser, regi_ser, rw_tr_baud_div, tr_baud);
279 REG_WR(ser, regi_ser, rw_rec_ctrl, rec_ctrl);
280 REG_WR(ser, regi_ser, rw_rec_baud_div, rec_baud);
288 /* input_data is set in head.S */
291 #ifdef CONFIG_ETRAX_DEBUG_PORT0
292 serial_setup(regi_ser0);
294 #ifdef CONFIG_ETRAX_DEBUG_PORT1
295 serial_setup(regi_ser1);
297 #ifdef CONFIG_ETRAX_DEBUG_PORT2
298 serial_setup(regi_ser2);
300 #ifdef CONFIG_ETRAX_DEBUG_PORT3
301 serial_setup(regi_ser3);
304 setup_normal_output_buffer();
308 __asm__ volatile ("move $vr,%0" : "=rm" (revision));
311 puts("You need an ETRAX FS to run Linux 2.6/crisv32.\n");
315 puts("Uncompressing Linux...\n");
317 puts("Done. Now booting the kernel.\n");