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
24 #include <linux/types.h>
25 #include <asm/arch/hwregs/reg_rdwr.h>
26 #include <asm/arch/hwregs/reg_map.h>
27 #include <asm/arch/hwregs/ser_defs.h>
36 void* memset(void* s, int c, size_t n);
37 void* memcpy(void* __dest, __const void* __src,
40 #define memzero(s, n) memset ((s), 0, (n))
43 typedef unsigned char uch;
44 typedef unsigned short ush;
45 typedef unsigned long ulg;
47 #define WSIZE 0x8000 /* Window size must be at least 32k, */
48 /* and a power of two */
50 static uch *inbuf; /* input buffer */
51 static uch window[WSIZE]; /* Sliding window buffer */
53 unsigned inptr = 0; /* index of next byte to be processed in inbuf
54 * After decompression it will contain the
55 * compressed size, and head.S will read it.
58 static unsigned outcnt = 0; /* bytes in output buffer */
61 #define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
62 #define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
63 #define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
64 #define ORIG_NAME 0x08 /* bit 3 set: original file name present */
65 #define COMMENT 0x10 /* bit 4 set: file comment present */
66 #define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
67 #define RESERVED 0xC0 /* bit 6,7: reserved */
69 #define get_byte() inbuf[inptr++]
71 /* Diagnostic functions */
73 # define Assert(cond,msg) {if(!(cond)) error(msg);}
74 # define Trace(x) fprintf x
75 # define Tracev(x) {if (verbose) fprintf x ;}
76 # define Tracevv(x) {if (verbose>1) fprintf x ;}
77 # define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
78 # define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
80 # define Assert(cond,msg)
88 static int fill_inbuf(void);
89 static void flush_window(void);
90 static void error(char *m);
91 static void gzip_mark(void **);
92 static void gzip_release(void **);
94 extern char *input_data; /* lives in head.S */
96 static long bytes_out = 0;
97 static uch *output_data;
98 static unsigned long output_ptr = 0;
100 static void *malloc(int size);
101 static void free(void *where);
102 static void error(char *m);
103 static void gzip_mark(void **);
104 static void gzip_release(void **);
106 static void puts(const char *);
108 /* the "heap" is put directly after the BSS ends, at end */
111 static long free_mem_ptr = (long)&_end;
113 #include "../../../../../lib/inflate.c"
115 static void *malloc(int size)
119 if (size <0) error("Malloc error");
121 free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */
123 p = (void *)free_mem_ptr;
124 free_mem_ptr += size;
129 static void free(void *where)
133 static void gzip_mark(void **ptr)
135 *ptr = (void *) free_mem_ptr;
138 static void gzip_release(void **ptr)
140 free_mem_ptr = (long) *ptr;
143 /* decompressor info and error messages to serial console */
146 serout(const char *s, reg_scope_instances regi_ser)
148 reg_ser_rs_stat_din rs;
149 reg_ser_rw_dout dout = {.data = *s};
152 rs = REG_RD(ser, regi_ser, rs_stat_din);
154 while (!rs.tr_rdy);/* Wait for tranceiver. */
156 REG_WR(ser, regi_ser, rw_dout, dout);
162 #ifndef CONFIG_ETRAX_DEBUG_PORT_NULL
164 #ifdef CONFIG_ETRAX_DEBUG_PORT0
165 serout(s, regi_ser0);
167 #ifdef CONFIG_ETRAX_DEBUG_PORT1
168 serout(s, regi_ser1);
170 #ifdef CONFIG_ETRAX_DEBUG_PORT2
171 serout(s, regi_ser2);
173 #ifdef CONFIG_ETRAX_DEBUG_PORT3
174 serout(s, regi_ser3);
178 /* CONFIG_ETRAX_DEBUG_PORT_NULL */
183 memset(void* s, int c, size_t n)
188 for (i=0;i<n;i++) ss[i] = c;
192 memcpy(void* __dest, __const void* __src,
196 char *d = (char *)__dest, *s = (char *)__src;
198 for (i=0;i<__n;i++) d[i] = s[i];
201 /* ===========================================================================
202 * Write the output window window[0..outcnt-1] and update crc and bytes_out.
203 * (Used for the decompressed data only.)
209 ulg c = crc; /* temporary variable */
214 out = &output_data[output_ptr];
215 for (n = 0; n < outcnt; n++) {
217 c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
220 bytes_out += (ulg)outcnt;
221 output_ptr += (ulg)outcnt;
230 puts("\n\n -- System halted\n");
236 setup_normal_output_buffer()
238 output_data = (char *)KERNEL_LOAD_ADR;
242 serial_setup(reg_scope_instances regi_ser)
244 reg_ser_rw_xoff xoff;
245 reg_ser_rw_tr_ctrl tr_ctrl;
246 reg_ser_rw_rec_ctrl rec_ctrl;
247 reg_ser_rw_tr_baud_div tr_baud;
248 reg_ser_rw_rec_baud_div rec_baud;
251 xoff = REG_RD(ser, regi_ser, rw_xoff);
254 xoff.automatic = regk_ser_no;
256 REG_WR(ser, regi_ser, rw_xoff, xoff);
258 /* Set baudrate and stopbits. */
259 tr_ctrl = REG_RD(ser, regi_ser, rw_tr_ctrl);
260 rec_ctrl = REG_RD(ser, regi_ser, rw_rec_ctrl);
261 tr_baud = REG_RD(ser, regi_ser, rw_tr_baud_div);
262 rec_baud = REG_RD(ser, regi_ser, rw_rec_baud_div);
264 tr_ctrl.stop_bits = 1; /* 2 stop bits. */
267 * The baudrate setup is a bit fishy, but in the end the tranceiver is
268 * set to 4800 and the receiver to 115200. The magic value is
271 tr_ctrl.base_freq = regk_ser_f29_493;
272 rec_ctrl.base_freq = regk_ser_f29_493;
273 tr_baud.div = (29493000 / 8) / 4800;
274 rec_baud.div = (29493000 / 8) / 115200;
276 REG_WR(ser, regi_ser, rw_tr_ctrl, tr_ctrl);
277 REG_WR(ser, regi_ser, rw_tr_baud_div, tr_baud);
278 REG_WR(ser, regi_ser, rw_rec_ctrl, rec_ctrl);
279 REG_WR(ser, regi_ser, rw_rec_baud_div, rec_baud);
287 /* input_data is set in head.S */
290 #ifdef CONFIG_ETRAX_DEBUG_PORT0
291 serial_setup(regi_ser0);
293 #ifdef CONFIG_ETRAX_DEBUG_PORT1
294 serial_setup(regi_ser1);
296 #ifdef CONFIG_ETRAX_DEBUG_PORT2
297 serial_setup(regi_ser2);
299 #ifdef CONFIG_ETRAX_DEBUG_PORT3
300 serial_setup(regi_ser3);
303 setup_normal_output_buffer();
307 __asm__ volatile ("move $vr,%0" : "=rm" (revision));
310 puts("You need an ETRAX FS to run Linux 2.6/crisv32.\n");
314 puts("Uncompressing Linux...\n");
316 puts("Done. Now booting the kernel.\n");