summaryrefslogtreecommitdiff
path: root/gdb/sh-stub.c
diff options
context:
space:
mode:
Diffstat (limited to 'gdb/sh-stub.c')
-rw-r--r--gdb/sh-stub.c1618
1 files changed, 0 insertions, 1618 deletions
diff --git a/gdb/sh-stub.c b/gdb/sh-stub.c
deleted file mode 100644
index 9daca39f72..0000000000
--- a/gdb/sh-stub.c
+++ /dev/null
@@ -1,1618 +0,0 @@
1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2002 by Linus Nielsen Feltzing
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
16 *
17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
18 * KIND, either express or implied.
19 *
20 ****************************************************************************/
21/* sh-stub.c -- debugging stub for the Hitachi-SH.
22
23 NOTE!! This code has to be compiled with optimization, otherwise the
24 function inlining which generates the exception handlers won't work.
25
26*/
27
28/* This is originally based on an m68k software stub written by Glenn
29 Engel at HP, but has changed quite a bit.
30
31 Modifications for the SH by Ben Lee and Steve Chamberlain
32
33 Even more modifications for GCC 3.0 and The Rockbox by Linus
34 Nielsen Feltzing
35*/
36
37/****************************************************************************
38
39 THIS SOFTWARE IS NOT COPYRIGHTED
40
41 HP offers the following for use in the public domain. HP makes no
42 warranty with regard to the software or it's performance and the
43 user accepts the software "AS IS" with all faults.
44
45 HP DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD
46 TO THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES
47 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
48
49****************************************************************************/
50
51
52/* Remote communication protocol.
53
54 A debug packet whose contents are <data>
55 is encapsulated for transmission in the form:
56
57 $ <data> # CSUM1 CSUM2
58
59 <data> must be ASCII alphanumeric and cannot include characters
60 '$' or '#'. If <data> starts with two characters followed by
61 ':', then the existing stubs interpret this as a sequence number.
62
63 CSUM1 and CSUM2 are ascii hex representation of an 8-bit
64 checksum of <data>, the most significant nibble is sent first.
65 the hex digits 0-9,a-f are used.
66
67 Receiver responds with:
68
69 + - if CSUM is correct and ready for next packet
70 - - if CSUM is incorrect
71
72 <data> is as follows:
73 All values are encoded in ascii hex digits.
74
75 Request Packet
76
77 read registers g
78 reply XX....X Each byte of register data
79 is described by two hex digits.
80 Registers are in the internal order
81 for GDB, and the bytes in a register
82 are in the same order the machine uses.
83 or ENN for an error.
84
85 write regs GXX..XX Each byte of register data
86 is described by two hex digits.
87 reply OK for success
88 ENN for an error
89
90 write reg Pn...=r... Write register n... with value r...,
91 which contains two hex digits for each
92 byte in the register (target byte
93 order).
94 reply OK for success
95 ENN for an error
96 (not supported by all stubs).
97
98 read mem mAA..AA,LLLL AA..AA is address, LLLL is length.
99 reply XX..XX XX..XX is mem contents
100 Can be fewer bytes than requested
101 if able to read only part of the data.
102 or ENN NN is errno
103
104 write mem MAA..AA,LLLL:XX..XX
105 AA..AA is address,
106 LLLL is number of bytes,
107 XX..XX is data
108 reply OK for success
109 ENN for an error (this includes the case
110 where only part of the data was
111 written).
112
113 cont cAA..AA AA..AA is address to resume
114 If AA..AA is omitted,
115 resume at same address.
116
117 step sAA..AA AA..AA is address to resume
118 If AA..AA is omitted,
119 resume at same address.
120
121 last signal ? Reply the current reason for stopping.
122 This is the same reply as is generated
123 for step or cont : SAA where AA is the
124 signal number.
125
126 There is no immediate reply to step or cont.
127 The reply comes when the machine stops.
128 It is SAA AA is the "signal number"
129
130 or... TAAn...:r...;n:r...;n...:r...;
131 AA = signal number
132 n... = register number
133 r... = register contents
134 or... WAA The process exited, and AA is
135 the exit status. This is only
136 applicable for certains sorts of
137 targets.
138 kill request k
139
140 toggle debug d toggle debug flag (see 386 & 68k stubs)
141 reset r reset -- see sparc stub.
142 reserved <other> On other requests, the stub should
143 ignore the request and send an empty
144 response ($#<checksum>). This way
145 we can extend the protocol and GDB
146 can tell whether the stub it is
147 talking to uses the old or the new.
148 search tAA:PP,MM Search backwards starting at address
149 AA for a match with pattern PP and
150 mask MM. PP and MM are 4 bytes.
151 Not supported by all stubs.
152
153 general query qXXXX Request info about XXXX.
154 general set QXXXX=yyyy Set value of XXXX to yyyy.
155 query sect offs qOffsets Get section offsets. Reply is
156 Text=xxx;Data=yyy;Bss=zzz
157 console output Otext Send text to stdout. Only comes from
158 remote target.
159
160 Responses can be run-length encoded to save space. A '*' means that
161 the next character is an ASCII encoding giving a repeat count which
162 stands for that many repititions of the character preceding the '*'.
163 The encoding is n+29, yielding a printable character where n >=3
164 (which is where rle starts to win). Don't use an n > 126.
165
166 So
167 "0* " means the same as "0000". */
168
169#include "sh7034.h"
170#include <string.h>
171
172typedef int jmp_buf[20];
173
174void longjmp(jmp_buf __jmpb, int __retval);
175int setjmp(jmp_buf __jmpb);
176
177/* We need to undefine this from the sh7034.h file */
178#undef GBR
179
180/* Hitachi SH architecture instruction encoding masks */
181
182#define COND_BR_MASK 0xff00
183#define UCOND_DBR_MASK 0xe000
184#define UCOND_RBR_MASK 0xf0df
185#define TRAPA_MASK 0xff00
186
187#define COND_DISP 0x00ff
188#define UCOND_DISP 0x0fff
189#define UCOND_REG 0x0f00
190
191/* Hitachi SH instruction opcodes */
192
193#define BF_INSTR 0x8b00
194#define BT_INSTR 0x8900
195#define BRA_INSTR 0xa000
196#define BSR_INSTR 0xb000
197#define JMP_INSTR 0x402b
198#define JSR_INSTR 0x400b
199#define RTS_INSTR 0x000b
200#define RTE_INSTR 0x002b
201#define TRAPA_INSTR 0xc300
202#define SSTEP_INSTR 0xc37f
203
204/* Hitachi SH processor register masks */
205
206#define T_BIT_MASK 0x0001
207
208/*
209 * BUFMAX defines the maximum number of characters in inbound/outbound
210 * buffers. At least NUMREGBYTES*2 are needed for register packets.
211 */
212#define BUFMAX 1024
213
214/*
215 * Number of bytes for registers
216 */
217#define NUMREGBYTES 112 /* 92 */
218
219/*
220 * Forward declarations
221 */
222
223static int hex (char);
224static char *mem2hex (char *mem, char *buf, int count);
225static char *hex2mem (char *buf, char *mem, int count);
226static int hex2int (char **ptr, int *intValue);
227static unsigned char *getpacket (void);
228static void putpacket (register char *buffer);
229static int computeSignal (int exceptionVector);
230void handle_buserror (void);
231void handle_exception (int exceptionVector);
232void init_serial(void);
233
234void serial_putc (char ch);
235char serial_getc (void);
236
237/* These are in the file but in asm statements so the compiler can't see them */
238void catch_exception_4 (void);
239void catch_exception_5 (void);
240void catch_exception_6 (void);
241void catch_exception_7 (void);
242void catch_exception_8 (void);
243void catch_exception_9 (void);
244void catch_exception_10 (void);
245void catch_exception_11 (void);
246void catch_exception_12 (void);
247void catch_exception_13 (void);
248void catch_exception_14 (void);
249void catch_exception_15 (void);
250void catch_exception_16 (void);
251void catch_exception_17 (void);
252void catch_exception_18 (void);
253void catch_exception_19 (void);
254void catch_exception_20 (void);
255void catch_exception_21 (void);
256void catch_exception_22 (void);
257void catch_exception_23 (void);
258void catch_exception_24 (void);
259void catch_exception_25 (void);
260void catch_exception_26 (void);
261void catch_exception_27 (void);
262void catch_exception_28 (void);
263void catch_exception_29 (void);
264void catch_exception_30 (void);
265void catch_exception_31 (void);
266void catch_exception_32 (void);
267void catch_exception_33 (void);
268void catch_exception_34 (void);
269void catch_exception_35 (void);
270void catch_exception_36 (void);
271void catch_exception_37 (void);
272void catch_exception_38 (void);
273void catch_exception_39 (void);
274void catch_exception_40 (void);
275void catch_exception_41 (void);
276void catch_exception_42 (void);
277void catch_exception_43 (void);
278void catch_exception_44 (void);
279void catch_exception_45 (void);
280void catch_exception_46 (void);
281void catch_exception_47 (void);
282void catch_exception_48 (void);
283void catch_exception_49 (void);
284void catch_exception_50 (void);
285void catch_exception_51 (void);
286void catch_exception_52 (void);
287void catch_exception_53 (void);
288void catch_exception_54 (void);
289void catch_exception_55 (void);
290void catch_exception_56 (void);
291void catch_exception_57 (void);
292void catch_exception_58 (void);
293void catch_exception_59 (void);
294void catch_exception_60 (void);
295void catch_exception_61 (void);
296void catch_exception_62 (void);
297void catch_exception_63 (void);
298void catch_exception_64 (void);
299void catch_exception_65 (void);
300void catch_exception_66 (void);
301void catch_exception_67 (void);
302void catch_exception_68 (void);
303void catch_exception_69 (void);
304void catch_exception_70 (void);
305void catch_exception_71 (void);
306void catch_exception_72 (void);
307void catch_exception_73 (void);
308void catch_exception_74 (void);
309void catch_exception_75 (void);
310void catch_exception_76 (void);
311void catch_exception_77 (void);
312void catch_exception_78 (void);
313void catch_exception_79 (void);
314void catch_exception_80 (void);
315void catch_exception_81 (void);
316void catch_exception_82 (void);
317void catch_exception_83 (void);
318void catch_exception_84 (void);
319void catch_exception_85 (void);
320void catch_exception_86 (void);
321void catch_exception_87 (void);
322void catch_exception_88 (void);
323void catch_exception_89 (void);
324void catch_exception_90 (void);
325void catch_exception_91 (void);
326void catch_exception_92 (void);
327void catch_exception_93 (void);
328void catch_exception_94 (void);
329void catch_exception_95 (void);
330void catch_exception_96 (void);
331void catch_exception_97 (void);
332void catch_exception_98 (void);
333void catch_exception_99 (void);
334void catch_exception_100 (void);
335void catch_exception_101 (void);
336void catch_exception_102 (void);
337void catch_exception_103 (void);
338void catch_exception_104 (void);
339void catch_exception_105 (void);
340void catch_exception_106 (void);
341void catch_exception_107 (void);
342void catch_exception_108 (void);
343void catch_exception_109 (void);
344void catch_exception_110 (void);
345void catch_exception_111 (void);
346void catch_exception_112 (void);
347void catch_exception_113 (void);
348void catch_exception_114 (void);
349void catch_exception_115 (void);
350void catch_exception_116 (void);
351void catch_exception_117 (void);
352void catch_exception_118 (void);
353void catch_exception_119 (void);
354void catch_exception_120 (void);
355void catch_exception_121 (void);
356void catch_exception_122 (void);
357void catch_exception_123 (void);
358void catch_exception_124 (void);
359void catch_exception_125 (void);
360void catch_exception_126 (void);
361void catch_exception_127 (void);
362
363void breakpoint (void);
364
365
366//#define stub_stack_size 2*1024
367
368//int stub_stack[stub_stack_size] __attribute__ ((section (".stack"))) = {0};
369
370extern int stub_stack[];
371
372void INIT (void);
373void start (void);
374
375#define CPU_BUS_ERROR_VEC 9
376#define DMA_BUS_ERROR_VEC 10
377#define NMI_VEC 11
378#define INVALID_INSN_VEC 4
379#define INVALID_SLOT_VEC 6
380#define TRAP_VEC 32
381#define IO_VEC 33
382#define USER_VEC 127
383
384static char in_nmi; /* Set when handling an NMI, so we don't reenter */
385static int dofault; /* Non zero, bus errors will raise exception */
386
387static int *stub_sp;
388
389/* debug > 0 prints ill-formed commands in valid packets & checksum errors */
390static int remote_debug;
391
392/* jump buffer used for setjmp/longjmp */
393static jmp_buf remcomEnv;
394
395enum regnames
396{
397 R0, R1, R2, R3, R4, R5, R6, R7,
398 R8, R9, R10, R11, R12, R13, R14,
399 R15, PC, PR, GBR, VBR, MACH, MACL, SR,
400 TICKS, STALLS, CYCLES, INSTS, PLR
401};
402
403typedef struct
404{
405 short *memAddr;
406 short oldInstr;
407}
408stepData;
409
410static int registers[NUMREGBYTES / 4];
411static stepData instrBuffer;
412static char stepped;
413static const char hexchars[] = "0123456789abcdef";
414static char remcomInBuffer[BUFMAX];
415static char remcomOutBuffer[BUFMAX];
416
417#define ATA_NSECTOR (*((volatile unsigned char*)0x06100102))
418#define ATA_COMMAND (*((volatile unsigned char*)0x06100107))
419
420/* You may need to change this depending on your ATA I/O address
421** 0x200 - 0x06200206
422** 0x300 - 0x06200306
423*/
424#define ATA_CONTROL (*((volatile unsigned char*)0x06200206))
425#define ATA_ALT_STATUS ATA_CONTROL
426
427#define STATUS_BSY 0x80
428#define STATUS_RDY 0x40
429
430#define CMD_STANDBY_IMMEDIATE 0xE0
431#define CMD_STANDBY 0xE2
432
433void ata_wait_for_bsy(void)
434{
435 while (ATA_ALT_STATUS & STATUS_BSY);
436}
437
438int ata_wait_for_rdy(void)
439{
440 ata_wait_for_bsy();
441 return ATA_ALT_STATUS & STATUS_RDY;
442}
443
444int ata_spindown(int time)
445{
446 /* Port A setup */
447 PAIOR |= 0x0280; /* output for ATA reset, IDE enable */
448 PADR |= 0x0200; /* release ATA reset */
449 PACR2 &= 0xBFFF; /* GPIO function for PA7 (IDE enable) */
450
451 /* activate ATA */
452 PADR &= ~0x80;
453
454 if(!ata_wait_for_rdy())
455 return -1;
456
457 if ( time == -1 ) {
458 ATA_COMMAND = CMD_STANDBY_IMMEDIATE;
459 }
460 else {
461 if (time > 255)
462 return -1;
463 ATA_NSECTOR = time & 0xff;
464 ATA_COMMAND = CMD_STANDBY;
465 }
466
467 if (!ata_wait_for_rdy())
468 return -1;
469
470 return 0;
471}
472
473void blink(void)
474{
475 while(1)
476 {
477 int i;
478 PBDR ^= 0x40; /* toggle PB6 */
479 for(i = 0;i < 500000;i++)
480 {
481 }
482 }
483}
484
485char highhex(int x)
486{
487 return hexchars[(x >> 4) & 0xf];
488}
489
490char lowhex(int x)
491{
492 return hexchars[x & 0xf];
493}
494
495/*
496 * Assembly macros
497 */
498
499#define BREAKPOINT() asm("trapa #0x20"::);
500
501
502/*
503 * Routines to handle hex data
504 */
505
506static int hex (char ch)
507{
508 if ((ch >= 'a') && (ch <= 'f'))
509 return (ch - 'a' + 10);
510 if ((ch >= '0') && (ch <= '9'))
511 return (ch - '0');
512 if ((ch >= 'A') && (ch <= 'F'))
513 return (ch - 'A' + 10);
514 return (-1);
515}
516
517/* convert the memory, pointed to by mem into hex, placing result in buf */
518/* return a pointer to the last char put in buf (null) */
519static char *mem2hex (char *mem, char *buf, int count)
520{
521 int i;
522 int ch;
523 for (i = 0; i < count; i++)
524 {
525 ch = *mem++;
526 *buf++ = highhex (ch);
527 *buf++ = lowhex (ch);
528 }
529 *buf = 0;
530 return (buf);
531}
532
533/* convert the hex array pointed to by buf into binary, to be placed in mem */
534/* return a pointer to the character after the last byte written */
535static char *hex2mem (char *buf, char *mem, int count)
536{
537 int i;
538 unsigned char ch;
539 for (i = 0; i < count; i++)
540 {
541 ch = hex (*buf++) << 4;
542 ch = ch + hex (*buf++);
543 *mem++ = ch;
544 }
545 return (mem);
546}
547
548/**********************************************/
549/* WHILE WE FIND NICE HEX CHARS, BUILD AN INT */
550/* RETURN NUMBER OF CHARS PROCESSED */
551/**********************************************/
552static int hex2int (char **ptr, int *intValue)
553{
554 int numChars = 0;
555 int hexValue;
556
557 *intValue = 0;
558
559 while (**ptr)
560 {
561 hexValue = hex (**ptr);
562 if (hexValue >= 0)
563 {
564 *intValue = (*intValue << 4) | hexValue;
565 numChars++;
566 }
567 else
568 break;
569
570 (*ptr)++;
571 }
572
573 return (numChars);
574}
575
576/*
577 * Routines to get and put packets
578 */
579
580/* scan for the sequence $<data>#<checksum> */
581
582unsigned char *getpacket (void)
583{
584 unsigned char *buffer = &remcomInBuffer[0];
585 unsigned char checksum;
586 unsigned char xmitcsum;
587 int count;
588 char ch;
589
590 while (1)
591 {
592 /* wait around for the start character, ignore all other characters */
593 while ((ch = serial_getc ()) != '$')
594 ;
595
596 retry:
597 checksum = 0;
598 xmitcsum = -1;
599 count = 0;
600
601 /* now, read until a # or end of buffer is found */
602 while (count < BUFMAX)
603 {
604 ch = serial_getc ();
605 if (ch == '$')
606 goto retry;
607 if (ch == '#')
608 break;
609 checksum = checksum + ch;
610 buffer[count] = ch;
611 count = count + 1;
612 }
613 buffer[count] = 0;
614
615 if (ch == '#')
616 {
617 ch = serial_getc ();
618 xmitcsum = hex (ch) << 4;
619 ch = serial_getc ();
620 xmitcsum += hex (ch);
621
622 if (checksum != xmitcsum)
623 {
624 serial_putc ('-'); /* failed checksum */
625 }
626 else
627 {
628 serial_putc ('+'); /* successful transfer */
629
630 /* if a sequence char is present, reply the sequence ID */
631 if (buffer[2] == ':')
632 {
633 serial_putc (buffer[0]);
634 serial_putc (buffer[1]);
635
636 return &buffer[3];
637 }
638
639 return &buffer[0];
640 }
641 }
642 }
643}
644
645
646/* send the packet in buffer. */
647
648static void putpacket (register char *buffer)
649{
650 register int checksum;
651
652 /* $<packet info>#<checksum>. */
653 do
654 {
655 char *src = buffer;
656 serial_putc ('$');
657 checksum = 0;
658
659 while (*src)
660 {
661 int runlen;
662
663 /* Do run length encoding */
664 for (runlen = 0; runlen < 100; runlen ++)
665 {
666 if (src[0] != src[runlen] || runlen == 99)
667 {
668 if (runlen > 3)
669 {
670 int encode;
671 /* Got a useful amount */
672 serial_putc (*src);
673 checksum += *src;
674 serial_putc ('*');
675 checksum += '*';
676 checksum += (encode = runlen + ' ' - 4);
677 serial_putc (encode);
678 src += runlen;
679 }
680 else
681 {
682 serial_putc (*src);
683 checksum += *src;
684 src++;
685 }
686 break;
687 }
688 }
689 }
690
691
692 serial_putc ('#');
693 serial_putc (highhex(checksum));
694 serial_putc (lowhex(checksum));
695 }
696 while (serial_getc() != '+');
697}
698
699
700/* a bus error has occurred, perform a longjmp
701 to return execution and allow handling of the error */
702
703void handle_buserror (void)
704{
705 longjmp (remcomEnv, 1);
706}
707
708#define SIGINT 2 /* interrupt */
709#define SIGILL 4 /* illegal instruction (not reset when caught) */
710#define SIGTRAP 5 /* trace trap (not reset when caught) */
711#define SIGEMT 7 /* EMT instruction */
712#define SIGBUS 10 /* bus error */
713
714/*
715 * this function takes the SH-1 exception number and attempts to
716 * translate this number into a unix compatible signal value
717 */
718static int computeSignal (int exceptionVector)
719{
720 int sigval;
721 switch (exceptionVector)
722 {
723 case INVALID_INSN_VEC:
724 sigval = SIGILL;
725 break;
726 case INVALID_SLOT_VEC:
727 sigval = SIGILL;
728 break;
729 case CPU_BUS_ERROR_VEC:
730 sigval = SIGBUS;
731 break;
732 case DMA_BUS_ERROR_VEC:
733 sigval = SIGBUS;
734 break;
735 case NMI_VEC:
736 sigval = SIGINT;
737 break;
738
739 case TRAP_VEC:
740 case USER_VEC:
741 sigval = SIGTRAP;
742 break;
743
744 default:
745 sigval = SIGEMT; /* "software generated"*/
746 break;
747 }
748 return (sigval);
749}
750
751void doSStep (void)
752{
753 short *instrMem;
754 int displacement;
755 int reg;
756 unsigned short opcode;
757
758 instrMem = (short *) registers[PC];
759
760 opcode = *instrMem;
761 stepped = 1;
762
763 if ((opcode & COND_BR_MASK) == BT_INSTR)
764 {
765 if (registers[SR] & T_BIT_MASK)
766 {
767 displacement = (opcode & COND_DISP) << 1;
768 if (displacement & 0x80)
769 displacement |= 0xffffff00;
770 /*
771 * Remember PC points to second instr.
772 * after PC of branch ... so add 4
773 */
774 instrMem = (short *) (registers[PC] + displacement + 4);
775 }
776 else
777 instrMem += 1;
778 }
779 else if ((opcode & COND_BR_MASK) == BF_INSTR)
780 {
781 if (registers[SR] & T_BIT_MASK)
782 instrMem += 1;
783 else
784 {
785 displacement = (opcode & COND_DISP) << 1;
786 if (displacement & 0x80)
787 displacement |= 0xffffff00;
788 /*
789 * Remember PC points to second instr.
790 * after PC of branch ... so add 4
791 */
792 instrMem = (short *) (registers[PC] + displacement + 4);
793 }
794 }
795 else if ((opcode & UCOND_DBR_MASK) == BRA_INSTR)
796 {
797 displacement = (opcode & UCOND_DISP) << 1;
798 if (displacement & 0x0800)
799 displacement |= 0xfffff000;
800
801 /*
802 * Remember PC points to second instr.
803 * after PC of branch ... so add 4
804 */
805 instrMem = (short *) (registers[PC] + displacement + 4);
806 }
807 else if ((opcode & UCOND_RBR_MASK) == JSR_INSTR)
808 {
809 reg = (char) ((opcode & UCOND_REG) >> 8);
810
811 instrMem = (short *) registers[reg];
812 }
813 else if (opcode == RTS_INSTR)
814 instrMem = (short *) registers[PR];
815 else if (opcode == RTE_INSTR)
816 instrMem = (short *) registers[15];
817 else if ((opcode & TRAPA_MASK) == TRAPA_INSTR)
818 instrMem = (short *) ((opcode & ~TRAPA_MASK) << 2);
819 else
820 instrMem += 1;
821
822 instrBuffer.memAddr = instrMem;
823 instrBuffer.oldInstr = *instrMem;
824 *instrMem = SSTEP_INSTR;
825}
826
827
828/* Undo the effect of a previous doSStep. If we single stepped,
829 restore the old instruction. */
830void undoSStep (void)
831{
832 if (stepped)
833 {
834 short *instrMem;
835 instrMem = instrBuffer.memAddr;
836 *instrMem = instrBuffer.oldInstr;
837 }
838 stepped = 0;
839}
840
841/*
842 * This function does all exception handling. It only does two things -
843 * it figures out why it was called and tells gdb, and then it reacts
844 * to gdb's requests.
845 *
846*/
847void gdb_handle_exception (int exceptionVector)
848{
849 int sigval, stepping;
850 int addr, length;
851 char *ptr;
852
853 /* reply to host that an exception has occurred */
854 sigval = computeSignal (exceptionVector);
855 remcomOutBuffer[0] = 'S';
856 remcomOutBuffer[1] = highhex(sigval);
857 remcomOutBuffer[2] = lowhex (sigval);
858 remcomOutBuffer[3] = 0;
859
860 putpacket (remcomOutBuffer);
861
862 /*
863 * exception 127 indicates a software trap
864 * inserted in place of code ... so back up
865 * PC by one instruction, since this instruction
866 * will later be replaced by its original one!
867 */
868 if (exceptionVector == USER_VEC
869 || exceptionVector == TRAP_VEC)
870 registers[PC] -= 2;
871
872 /*
873 * Do the things needed to undo
874 * any stepping we may have done!
875 */
876 undoSStep ();
877
878 stepping = 0;
879
880 while (1)
881 {
882 remcomOutBuffer[0] = 0;
883 ptr = getpacket ();
884
885 switch (*ptr++)
886 {
887 case '?':
888 remcomOutBuffer[0] = 'S';
889 remcomOutBuffer[1] = highhex (sigval);
890 remcomOutBuffer[2] = lowhex (sigval);
891 remcomOutBuffer[3] = 0;
892 break;
893 case 'd':
894 remote_debug = !(remote_debug); /* toggle debug flag */
895 break;
896 case 'g': /* return the value of the CPU registers */
897 mem2hex ((char *) registers, remcomOutBuffer, NUMREGBYTES);
898 break;
899 case 'G': /* set the value of the CPU registers - return OK */
900 hex2mem (ptr, (char *) registers, NUMREGBYTES);
901 strcpy (remcomOutBuffer, "OK");
902 break;
903
904 /* mAA..AA,LLLL Read LLLL bytes at address AA..AA */
905 case 'm':
906 if (setjmp (remcomEnv) == 0)
907 {
908 dofault = 0;
909 /* TRY, TO READ %x,%x. IF SUCCEED, SET PTR = 0 */
910 if (hex2int (&ptr, &addr))
911 if (*(ptr++) == ',')
912 if (hex2int (&ptr, &length))
913 {
914 ptr = 0;
915 mem2hex ((char *) addr, remcomOutBuffer, length);
916 }
917 if (ptr)
918 strcpy (remcomOutBuffer, "E01");
919 }
920 else
921 strcpy (remcomOutBuffer, "E03");
922
923 /* restore handler for bus error */
924 dofault = 1;
925 break;
926
927 /* MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK */
928 case 'M':
929 if (setjmp (remcomEnv) == 0)
930 {
931 dofault = 0;
932
933 /* TRY, TO READ '%x,%x:'. IF SUCCEED, SET PTR = 0 */
934 if (hex2int (&ptr, &addr))
935 if (*(ptr++) == ',')
936 if (hex2int (&ptr, &length))
937 if (*(ptr++) == ':')
938 {
939 hex2mem (ptr, (char *) addr, length);
940 ptr = 0;
941 strcpy (remcomOutBuffer, "OK");
942 }
943 if (ptr)
944 strcpy (remcomOutBuffer, "E02");
945 }
946 else
947 strcpy (remcomOutBuffer, "E03");
948
949 /* restore handler for bus error */
950 dofault = 1;
951 break;
952
953 /* cAA..AA Continue at address AA..AA(optional) */
954 /* sAA..AA Step one instruction from AA..AA(optional) */
955 case 's':
956 stepping = 1;
957 case 'c':
958 {
959 /* tRY, to read optional parameter, pc unchanged if no parm */
960 if (hex2int (&ptr, &addr))
961 registers[PC] = addr;
962
963 if (stepping)
964 doSStep ();
965 }
966
967 return;
968 break;
969
970 /* kill the program */
971 case 'k': /* do nothing */
972 break;
973
974 default:
975 break;
976 } /* switch */
977
978 /* reply to the request */
979 putpacket (remcomOutBuffer);
980 }
981}
982
983
984/* We've had an exception - go into the gdb stub */
985void handle_exception(int exceptionVector)
986{
987 gdb_handle_exception (exceptionVector);
988}
989
990/* This function will generate a breakpoint exception. It is used at the
991 beginning of a program to sync up with a debugger and can be used
992 otherwise as a quick means to stop program execution and "break" into
993 the debugger. */
994void breakpoint (void)
995{
996 BREAKPOINT ();
997}
998
999/**** Processor-specific routines start here ****/
1000/**** Processor-specific routines start here ****/
1001/**** Processor-specific routines start here ****/
1002
1003extern int stack[];
1004
1005/* SH1/SH2 exception vector table format */
1006typedef struct
1007{
1008 void (*func_cold) (void);
1009 int *stack_cold;
1010 void (*func_warm) (void);
1011 int *stack_warm;
1012 void (*(handler[128 - 4])) (void);
1013} vec_type;
1014
1015/* vectable is the SH1/SH2 vector table. It must be at address 0
1016** or wherever your vbr points.
1017** Note that we only define the first 128 vectors, since the Jukebox
1018** firmware has its entry point at 0x200
1019*/
1020const vec_type vectable __attribute__ ((section (".vectors"))) =
1021{
1022 &start, /* 0: Power-on reset PC */
1023 stack, /* 1: Power-on reset SP */
1024 &start, /* 2: Manual reset PC */
1025 stack, /* 3: Manual reset SP */
1026 {
1027 &catch_exception_4, /* 4: General invalid instruction */
1028 &catch_exception_5, /* 5: Reserved for system */
1029 &catch_exception_6, /* 6: Invalid slot instruction */
1030 &catch_exception_7, /* 7: Reserved for system */
1031 &catch_exception_8, /* 8: Reserved for system */
1032 &catch_exception_9, /* 9: CPU bus error */
1033 &catch_exception_10, /* 10: DMA bus error */
1034 &catch_exception_11, /* 11: NMI */
1035 &catch_exception_12, /* 12: User break */
1036 &catch_exception_13, /* 13: Reserved for system */
1037 &catch_exception_14, /* 14: Reserved for system */
1038 &catch_exception_15, /* 15: Reserved for system */
1039 &catch_exception_16, /* 16: Reserved for system */
1040 &catch_exception_17, /* 17: Reserved for system */
1041 &catch_exception_18, /* 18: Reserved for system */
1042 &catch_exception_19, /* 19: Reserved for system */
1043 &catch_exception_20, /* 20: Reserved for system */
1044 &catch_exception_21, /* 21: Reserved for system */
1045 &catch_exception_22, /* 22: Reserved for system */
1046 &catch_exception_23, /* 23: Reserved for system */
1047 &catch_exception_24, /* 24: Reserved for system */
1048 &catch_exception_25, /* 25: Reserved for system */
1049 &catch_exception_26, /* 26: Reserved for system */
1050 &catch_exception_27, /* 27: Reserved for system */
1051 &catch_exception_28, /* 28: Reserved for system */
1052 &catch_exception_29, /* 29: Reserved for system */
1053 &catch_exception_30, /* 30: Reserved for system */
1054 &catch_exception_31, /* 31: Reserved for system */
1055 &catch_exception_32, /* 32: Trap instr (user vectors) */
1056 &catch_exception_33, /* 33: Trap instr (user vectors) */
1057 &catch_exception_34, /* 34: Trap instr (user vectors) */
1058 &catch_exception_35, /* 35: Trap instr (user vectors) */
1059 &catch_exception_36, /* 36: Trap instr (user vectors) */
1060 &catch_exception_37, /* 37: Trap instr (user vectors) */
1061 &catch_exception_38, /* 38: Trap instr (user vectors) */
1062 &catch_exception_39, /* 39: Trap instr (user vectors) */
1063 &catch_exception_40, /* 40: Trap instr (user vectors) */
1064 &catch_exception_41, /* 41: Trap instr (user vectors) */
1065 &catch_exception_42, /* 42: Trap instr (user vectors) */
1066 &catch_exception_43, /* 43: Trap instr (user vectors) */
1067 &catch_exception_44, /* 44: Trap instr (user vectors) */
1068 &catch_exception_45, /* 45: Trap instr (user vectors) */
1069 &catch_exception_46, /* 46: Trap instr (user vectors) */
1070 &catch_exception_47, /* 47: Trap instr (user vectors) */
1071 &catch_exception_48, /* 48: Trap instr (user vectors) */
1072 &catch_exception_49, /* 49: Trap instr (user vectors) */
1073 &catch_exception_50, /* 50: Trap instr (user vectors) */
1074 &catch_exception_51, /* 51: Trap instr (user vectors) */
1075 &catch_exception_52, /* 52: Trap instr (user vectors) */
1076 &catch_exception_53, /* 53: Trap instr (user vectors) */
1077 &catch_exception_54, /* 54: Trap instr (user vectors) */
1078 &catch_exception_55, /* 55: Trap instr (user vectors) */
1079 &catch_exception_56, /* 56: Trap instr (user vectors) */
1080 &catch_exception_57, /* 57: Trap instr (user vectors) */
1081 &catch_exception_58, /* 58: Trap instr (user vectors) */
1082 &catch_exception_59, /* 59: Trap instr (user vectors) */
1083 &catch_exception_60, /* 60: Trap instr (user vectors) */
1084 &catch_exception_61, /* 61: Trap instr (user vectors) */
1085 &catch_exception_62, /* 62: Trap instr (user vectors) */
1086 &catch_exception_63, /* 63: Trap instr (user vectors) */
1087 &catch_exception_64, /* 64: IRQ0 */
1088 &catch_exception_65, /* 65: IRQ1 */
1089 &catch_exception_66, /* 66: IRQ2 */
1090 &catch_exception_67, /* 67: IRQ3 */
1091 &catch_exception_68, /* 68: IRQ4 */
1092 &catch_exception_69, /* 69: IRQ5 */
1093 &catch_exception_70, /* 70: IRQ6 */
1094 &catch_exception_71, /* 71: IRQ7 */
1095 &catch_exception_72,
1096 &catch_exception_73,
1097 &catch_exception_74,
1098 &catch_exception_75,
1099 &catch_exception_76,
1100 &catch_exception_77,
1101 &catch_exception_78,
1102 &catch_exception_79,
1103 &catch_exception_80,
1104 &catch_exception_81,
1105 &catch_exception_82,
1106 &catch_exception_83,
1107 &catch_exception_84,
1108 &catch_exception_85,
1109 &catch_exception_86,
1110 &catch_exception_87,
1111 &catch_exception_88,
1112 &catch_exception_89,
1113 &catch_exception_90,
1114 &catch_exception_91,
1115 &catch_exception_92,
1116 &catch_exception_93,
1117 &catch_exception_94,
1118 &catch_exception_95,
1119 &catch_exception_96,
1120 &catch_exception_97,
1121 &catch_exception_98,
1122 &catch_exception_99,
1123 &catch_exception_100,
1124 &catch_exception_101,
1125 &catch_exception_102,
1126 &catch_exception_103,
1127 &catch_exception_104,
1128 &catch_exception_105,
1129 &catch_exception_106,
1130 &catch_exception_107,
1131 &catch_exception_108,
1132 &catch_exception_109,
1133 &catch_exception_110,
1134 &catch_exception_111,
1135 &catch_exception_112,
1136 &catch_exception_113,
1137 &catch_exception_114,
1138 &catch_exception_115,
1139 &catch_exception_116,
1140 &catch_exception_117,
1141 &catch_exception_118,
1142 &catch_exception_119,
1143 &catch_exception_120,
1144 &catch_exception_121,
1145 &catch_exception_122,
1146 &catch_exception_123,
1147 &catch_exception_124,
1148 &catch_exception_125,
1149 &catch_exception_126,
1150 &catch_exception_127}};
1151
1152void INIT (void)
1153{
1154 /* Disable all timer interrupts */
1155 TIER0 = 0;
1156 TIER1 = 0;
1157 TIER2 = 0;
1158 TIER3 = 0;
1159 TIER4 = 0;
1160
1161 init_serial();
1162
1163 in_nmi = 0;
1164 dofault = 1;
1165 stepped = 0;
1166
1167 ata_spindown(-1);
1168
1169 stub_sp = stub_stack;
1170 breakpoint ();
1171
1172 /* We should never come here */
1173 blink();
1174}
1175
1176void sr(void)
1177{
1178 /* Calling Reset does the same as pressing the button */
1179 asm (".global _Reset\n"
1180 " .global _WarmReset\n"
1181 "_Reset:\n"
1182 "_WarmReset:\n"
1183 " mov.l L_sp,r15\n"
1184 " bra _INIT\n"
1185 " nop\n"
1186 " .align 2\n"
1187 "L_sp: .long _stack");
1188
1189 asm("saveRegisters:\n");
1190 asm(" mov.l @(L_reg, pc), r0\n"
1191 " mov.l @r15+, r1 ! pop R0\n"
1192 " mov.l r2, @(0x08, r0) ! save R2\n"
1193 " mov.l r1, @r0 ! save R0\n"
1194 " mov.l @r15+, r1 ! pop R1\n"
1195 " mov.l r3, @(0x0c, r0) ! save R3\n"
1196 " mov.l r1, @(0x04, r0) ! save R1\n"
1197 " mov.l r4, @(0x10, r0) ! save R4\n"
1198 " mov.l r5, @(0x14, r0) ! save R5\n"
1199 " mov.l r6, @(0x18, r0) ! save R6\n"
1200 " mov.l r7, @(0x1c, r0) ! save R7\n"
1201 " mov.l r8, @(0x20, r0) ! save R8\n"
1202 " mov.l r9, @(0x24, r0) ! save R9\n"
1203 " mov.l r10, @(0x28, r0) ! save R10\n"
1204 " mov.l r11, @(0x2c, r0) ! save R11\n"
1205 " mov.l r12, @(0x30, r0) ! save R12\n"
1206 " mov.l r13, @(0x34, r0) ! save R13\n"
1207 " mov.l r14, @(0x38, r0) ! save R14\n"
1208 " mov.l @r15+, r4 ! save arg to handleException\n"
1209 " add #8, r15 ! hide PC/SR values on stack\n"
1210 " mov.l r15, @(0x3c, r0) ! save R15\n"
1211 " add #-8, r15 ! save still needs old SP value\n"
1212 " add #92, r0 ! readjust register pointer\n"
1213 " mov r15, r2\n"
1214 " add #4, r2\n"
1215 " mov.l @r2, r2 ! R2 has SR\n"
1216 " mov.l @r15, r1 ! R1 has PC\n"
1217 " mov.l r2, @-r0 ! save SR\n"
1218 " sts.l macl, @-r0 ! save MACL\n"
1219 " sts.l mach, @-r0 ! save MACH\n"
1220 " stc.l vbr, @-r0 ! save VBR\n"
1221 " stc.l gbr, @-r0 ! save GBR\n"
1222 " sts.l pr, @-r0 ! save PR\n"
1223 " mov.l @(L_stubstack, pc), r2\n"
1224 " mov.l @(L_hdl_except, pc), r3\n"
1225 " mov.l @r2, r15\n"
1226 " jsr @r3\n"
1227 " mov.l r1, @-r0 ! save PC\n"
1228 " mov.l @(L_stubstack, pc), r0\n"
1229 " mov.l @(L_reg, pc), r1\n"
1230 " bra restoreRegisters\n"
1231 " mov.l r15, @r0 ! save __stub_stack\n"
1232
1233 " .align 2\n"
1234 "L_reg:\n"
1235 " .long _registers\n"
1236 "L_stubstack:\n"
1237 " .long _stub_sp\n"
1238 "L_hdl_except:\n"
1239 " .long _handle_exception");
1240}
1241
1242void rr(void)
1243{
1244 asm(" .align 2 \n"
1245 " .global _resume\n"
1246 "_resume:\n"
1247 " mov r4,r1\n"
1248 "restoreRegisters:\n"
1249 " add #8, r1 ! skip to R2\n"
1250 " mov.l @r1+, r2 ! restore R2\n"
1251 " mov.l @r1+, r3 ! restore R3\n"
1252 " mov.l @r1+, r4 ! restore R4\n"
1253 " mov.l @r1+, r5 ! restore R5\n"
1254 " mov.l @r1+, r6 ! restore R6\n"
1255 " mov.l @r1+, r7 ! restore R7\n"
1256 " mov.l @r1+, r8 ! restore R8\n"
1257 " mov.l @r1+, r9 ! restore R9\n"
1258 " mov.l @r1+, r10 ! restore R10\n"
1259 " mov.l @r1+, r11 ! restore R11\n"
1260 " mov.l @r1+, r12 ! restore R12\n"
1261 " mov.l @r1+, r13 ! restore R13\n"
1262 " mov.l @r1+, r14 ! restore R14\n"
1263 " mov.l @r1+, r15 ! restore programs stack\n"
1264 " mov.l @r1+, r0\n"
1265 " add #-8, r15 ! uncover PC/SR on stack \n"
1266 " mov.l r0, @r15 ! restore PC onto stack\n"
1267 " lds.l @r1+, pr ! restore PR\n"
1268 " ldc.l @r1+, gbr ! restore GBR\n"
1269 " ldc.l @r1+, vbr ! restore VBR\n"
1270 " lds.l @r1+, mach ! restore MACH\n"
1271 " lds.l @r1+, macl ! restore MACL\n"
1272 " mov.l @r1, r0 \n"
1273 " add #-88, r1 ! readjust reg pointer to R1\n"
1274 " mov.l r0, @(4, r15) ! restore SR onto stack+4\n"
1275 " mov.l r2, @-r15\n"
1276 " mov.l L_in_nmi, r0\n"
1277 " mov #0, r2\n"
1278 " mov.b r2, @r0\n"
1279 " mov.l @r15+, r2\n"
1280 " mov.l @r1+, r0 ! restore R0\n"
1281 " rte\n"
1282 " mov.l @r1, r1 ! restore R1");
1283}
1284
1285static inline void code_for_catch_exception(unsigned int n)
1286{
1287 asm(" .globl _catch_exception_%O0" : : "X" (n) );
1288 asm(" _catch_exception_%O0:" :: "X" (n) );
1289
1290 asm(" add #-4, r15 ! reserve spot on stack ");
1291 asm(" mov.l r1, @-r15 ! push R1 ");
1292
1293 if (n == NMI_VEC)
1294 {
1295 /* Special case for NMI - make sure that they don't nest */
1296 asm(" mov.l r0, @-r15 ! push R0");
1297 asm(" mov.l L_in_nmi, r0");
1298 asm(" tas.b @r0 ! Fend off against addtnl NMIs");
1299 asm(" bt noNMI");
1300 asm(" mov.l @r15+, r0");
1301 asm(" mov.l @r15+, r1");
1302 asm(" add #4, r15");
1303 asm(" rte");
1304 asm(" nop");
1305 asm(".align 2");
1306 asm("L_in_nmi: .long _in_nmi");
1307 asm("noNMI:");
1308 }
1309 else
1310 {
1311
1312 if (n == CPU_BUS_ERROR_VEC)
1313 {
1314 /* Exception 9 (bus errors) are disasbleable - so that you
1315 can probe memory and get zero instead of a fault.
1316 Because the vector table may be in ROM we don't revector
1317 the interrupt like all the other stubs, we check in here
1318 */
1319 asm("mov.l L_dofault,r1");
1320 asm("mov.l @r1,r1");
1321 asm("tst r1,r1");
1322 asm("bf faultaway");
1323 asm("bsr _handle_buserror");
1324 asm(".align 2");
1325 asm("L_dofault: .long _dofault");
1326 asm("faultaway:");
1327 }
1328 asm(" mov #15<<4, r1 ");
1329 asm(" ldc r1, sr ! disable interrupts ");
1330 asm(" mov.l r0, @-r15 ! push R0 ");
1331 }
1332
1333 /* Prepare for saving context, we've already pushed r0 and r1, stick
1334 exception number into the frame */
1335 asm(" mov r15, r0 ");
1336 asm(" add #8, r0 ");
1337 asm(" mov %0,r1" :: "X" (n));
1338 asm(" extu.b r1,r1 ");
1339 asm(" bra saveRegisters ! save register values ");
1340 asm(" mov.l r1, @r0 ! save exception # ");
1341}
1342
1343/* Here we call all defined exceptions, so the inline assembler gets
1344 generated */
1345void exceptions (void)
1346{
1347 code_for_catch_exception (4);
1348 code_for_catch_exception (5);
1349 code_for_catch_exception (6);
1350 code_for_catch_exception (7);
1351 code_for_catch_exception (8);
1352 code_for_catch_exception (9);
1353 code_for_catch_exception (10);
1354 code_for_catch_exception (11);
1355 code_for_catch_exception (12);
1356 code_for_catch_exception (13);
1357 code_for_catch_exception (14);
1358 code_for_catch_exception (15);
1359 code_for_catch_exception (16);
1360 code_for_catch_exception (17);
1361 code_for_catch_exception (18);
1362 code_for_catch_exception (19);
1363 code_for_catch_exception (20);
1364 code_for_catch_exception (21);
1365 code_for_catch_exception (22);
1366 code_for_catch_exception (23);
1367 code_for_catch_exception (24);
1368 code_for_catch_exception (25);
1369 code_for_catch_exception (26);
1370 code_for_catch_exception (27);
1371 code_for_catch_exception (28);
1372 code_for_catch_exception (29);
1373 code_for_catch_exception (30);
1374 code_for_catch_exception (31);
1375 code_for_catch_exception (32);
1376 code_for_catch_exception (33);
1377 code_for_catch_exception (34);
1378 code_for_catch_exception (35);
1379 code_for_catch_exception (36);
1380 code_for_catch_exception (37);
1381 code_for_catch_exception (38);
1382 code_for_catch_exception (39);
1383 code_for_catch_exception (40);
1384 code_for_catch_exception (41);
1385 code_for_catch_exception (42);
1386 code_for_catch_exception (43);
1387 code_for_catch_exception (44);
1388 code_for_catch_exception (45);
1389 code_for_catch_exception (46);
1390 code_for_catch_exception (47);
1391 code_for_catch_exception (48);
1392 code_for_catch_exception (49);
1393 code_for_catch_exception (50);
1394 code_for_catch_exception (51);
1395 code_for_catch_exception (52);
1396 code_for_catch_exception (53);
1397 code_for_catch_exception (54);
1398 code_for_catch_exception (55);
1399 code_for_catch_exception (56);
1400 code_for_catch_exception (57);
1401 code_for_catch_exception (58);
1402 code_for_catch_exception (59);
1403 code_for_catch_exception (60);
1404 code_for_catch_exception (61);
1405 code_for_catch_exception (62);
1406 code_for_catch_exception (63);
1407 code_for_catch_exception (64);
1408 code_for_catch_exception (65);
1409 code_for_catch_exception (66);
1410 code_for_catch_exception (67);
1411 code_for_catch_exception (68);
1412 code_for_catch_exception (69);
1413 code_for_catch_exception (70);
1414 code_for_catch_exception (71);
1415 code_for_catch_exception (72);
1416 code_for_catch_exception (73);
1417 code_for_catch_exception (74);
1418 code_for_catch_exception (75);
1419 code_for_catch_exception (76);
1420 code_for_catch_exception (77);
1421 code_for_catch_exception (78);
1422 code_for_catch_exception (79);
1423 code_for_catch_exception (80);
1424 code_for_catch_exception (81);
1425 code_for_catch_exception (82);
1426 code_for_catch_exception (83);
1427 code_for_catch_exception (84);
1428 code_for_catch_exception (85);
1429 code_for_catch_exception (86);
1430 code_for_catch_exception (87);
1431 code_for_catch_exception (88);
1432 code_for_catch_exception (89);
1433 code_for_catch_exception (90);
1434 code_for_catch_exception (91);
1435 code_for_catch_exception (92);
1436 code_for_catch_exception (93);
1437 code_for_catch_exception (94);
1438 code_for_catch_exception (95);
1439 code_for_catch_exception (96);
1440 code_for_catch_exception (97);
1441 code_for_catch_exception (98);
1442 code_for_catch_exception (99);
1443 code_for_catch_exception (100);
1444 code_for_catch_exception (101);
1445 code_for_catch_exception (102);
1446 code_for_catch_exception (103);
1447 code_for_catch_exception (104);
1448 code_for_catch_exception (105);
1449 code_for_catch_exception (106);
1450 code_for_catch_exception (107);
1451 code_for_catch_exception (108);
1452 code_for_catch_exception (109);
1453 code_for_catch_exception (110);
1454 code_for_catch_exception (111);
1455 code_for_catch_exception (112);
1456 code_for_catch_exception (113);
1457 code_for_catch_exception (114);
1458 code_for_catch_exception (115);
1459 code_for_catch_exception (116);
1460 code_for_catch_exception (117);
1461 code_for_catch_exception (118);
1462 code_for_catch_exception (119);
1463 code_for_catch_exception (120);
1464 code_for_catch_exception (121);
1465 code_for_catch_exception (122);
1466 code_for_catch_exception (123);
1467 code_for_catch_exception (124);
1468 code_for_catch_exception (125);
1469 code_for_catch_exception (126);
1470 code_for_catch_exception (127);
1471}
1472
1473/*
1474 * Port B Control Register (PBCR1)
1475 */
1476#define PB15MD1 0x8000
1477#define PB15MD0 0x4000
1478#define PB14MD1 0x2000
1479#define PB14MD0 0x1000
1480#define PB13MD1 0x0800
1481#define PB13MD0 0x0400
1482#define PB12MD1 0x0200
1483#define PB12MD0 0x0100
1484#define PB11MD1 0x0080
1485#define PB11MD0 0x0040
1486#define PB10MD1 0x0020
1487#define PB10MD0 0x0010
1488#define PB9MD1 0x0008
1489#define PB9MD0 0x0004
1490#define PB8MD1 0x0002
1491#define PB8MD0 0x0001
1492
1493#define PB15MD PB15MD1|PB14MD0
1494#define PB14MD PB14MD1|PB14MD0
1495#define PB13MD PB13MD1|PB13MD0
1496#define PB12MD PB12MD1|PB12MD0
1497#define PB11MD PB11MD1|PB11MD0
1498#define PB10MD PB10MD1|PB10MD0
1499#define PB9MD PB9MD1|PB9MD0
1500#define PB8MD PB8MD1|PB8MD0
1501
1502#define PB_TXD1 PB11MD1
1503#define PB_RXD1 PB10MD1
1504#define PB_TXD0 PB9MD1
1505#define PB_RXD0 PB8MD1
1506
1507#define PB7MD PB7MD1|PB7MD0
1508#define PB6MD PB6MD1|PB6MD0
1509#define PB5MD PB5MD1|PB5MD0
1510#define PB4MD PB4MD1|PB4MD0
1511#define PB3MD PB3MD1|PB3MD0
1512#define PB2MD PB2MD1|PB2MD0
1513#define PB1MD PB1MD1|PB1MD0
1514#define PB0MD PB0MD1|PB0MD0
1515
1516
1517void handleError (char theSSR);
1518
1519void nop (void)
1520{
1521}
1522
1523void init_serial (void)
1524{
1525 int i;
1526
1527 /* Clear Channel 1's SCR */
1528 SCR1 = 0;
1529
1530 /* Set communication to be async, 8-bit data,
1531 no parity, 1 stop bit and use internal clock */
1532 SMR1 = 0;
1533
1534#ifdef RECORDER
1535 #warning 115200
1536 BRR1 = 2; /* 115200 */
1537#else
1538 BRR1 = 9; /* 38400 */
1539#endif
1540
1541 SCR1 &= ~(SCI_CKE1 | SCI_CKE0);
1542
1543 /* let the hardware settle */
1544 for (i = 0; i < 1000; i++)
1545 nop ();
1546
1547 /* Turn on in and out */
1548 SCR1 |= SCI_RE | SCI_TE;
1549
1550 /* Set the PFC to make RXD1 (pin PB8) an input pin
1551 and TXD1 (pin PB9) an output pin */
1552 PBCR1 &= ~(PB_TXD1 | PB_RXD1);
1553 PBCR1 |= PB_TXD1 | PB_RXD1;
1554}
1555
1556
1557int serial_waitc(void)
1558{
1559 char mySSR;
1560 mySSR = SSR1 & ( SCI_PER | SCI_FER | SCI_ORER );
1561 if ( mySSR )
1562 handleError ( mySSR );
1563 return SSR1 & SCI_RDRF ;
1564}
1565
1566char serial_getc (void)
1567{
1568 char ch;
1569 char mySSR;
1570
1571 while ( ! serial_waitc())
1572 ;
1573
1574 ch = RDR1;
1575 SSR1 &= ~SCI_RDRF;
1576
1577 mySSR = SSR1 & (SCI_PER | SCI_FER | SCI_ORER);
1578
1579 if (mySSR)
1580 handleError (mySSR);
1581
1582 return ch;
1583}
1584
1585void serial_putc (char ch)
1586{
1587 while (!(SSR1 & SCI_TDRE))
1588 {
1589 ;
1590 }
1591
1592 /*
1593 * Write data into TDR and clear TDRE
1594 */
1595 TDR1 = ch;
1596 SSR1 &= ~SCI_TDRE;
1597}
1598
1599void handleError (char theSSR)
1600{
1601 /* Clear all error bits, otherwise the receiver will stop */
1602 SSR1 &= ~(SCI_ORER | SCI_PER | SCI_FER);
1603}
1604
1605void *memcpy(void *dest, const void *src0, size_t n)
1606{
1607 char *dst = (char *) dest;
1608 char *src = (char *) src0;
1609
1610 void *save = dest;
1611
1612 while(n--)
1613 {
1614 *dst++ = *src++;
1615 }
1616
1617 return save;
1618}
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-12 18:04:41 +0000