2 * This file is part of SIS.
4 * SIS, SPARC instruction simulator V2.5 Copyright (C) 1995 Jiri Gaisler,
5 * European Space Agency
7 * This program is free software; you can redistribute it and/or modify it under
8 * the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc., 675
19 * Mass Ave, Cambridge, MA 02139, USA.
23 /* The control space devices */
26 #include <sys/types.h>
30 #include <sys/fcntl.h>
35 #include "sim-config.h"
38 extern int32 sis_verbose;
39 extern int32 sparclite, sparclite_board;
40 extern int rom8,wrp,uben;
41 extern char uart_dev1[], uart_dev2[];
43 int dumbio = 0; /* normal, smart, terminal oriented IO by default */
46 #define MEC_START 0x01f80000
47 #define MEC_END 0x01f80100
49 /* Memory exception waitstates */
52 /* ERC32 always adds one waitstate during RAM std */
59 /* The target's byte order is big-endian by default until we load a
60 little-endian program. */
62 int current_target_byte_order = BIG_ENDIAN;
64 #define MEC_WS 0 /* Waitstates per MEC access (0 ws) */
67 /* MEC register addresses */
71 #define MEC_PWDR 0x008
72 #define MEC_MEMCFG 0x010
73 #define MEC_IOCR 0x014
76 #define MEC_MAR0 0x020
77 #define MEC_MAR1 0x024
79 #define MEC_SSA1 0x020
80 #define MEC_SEA1 0x024
81 #define MEC_SSA2 0x028
82 #define MEC_SEA2 0x02C
88 #define MEC_WDOG 0x060
89 #define MEC_TRAPD 0x064
90 #define MEC_RTC_COUNTER 0x080
91 #define MEC_RTC_RELOAD 0x080
92 #define MEC_RTC_SCALER 0x084
93 #define MEC_GPT_COUNTER 0x088
94 #define MEC_GPT_RELOAD 0x088
95 #define MEC_GPT_SCALER 0x08C
96 #define MEC_TIMER_CTRL 0x098
97 #define MEC_SFSR 0x0A0
98 #define MEC_FFAR 0x0A4
99 #define MEC_ERSR 0x0B0
100 #define MEC_DBG 0x0C0
101 #define MEC_TCR 0x0D0
103 #define MEC_BRK 0x0C4
104 #define MEC_WPR 0x0C8
106 #define MEC_UARTA 0x0E0
107 #define MEC_UARTB 0x0E4
108 #define MEC_UART_CTRL 0x0E8
109 #define SIM_LOAD 0x0F0
111 /* Memory exception causes */
115 #define WATCH_EXC 0xa
116 #define BREAK_EXC 0xb
118 /* Size of UART buffers (bytes) */
121 /* Number of simulator ticks between flushing the UARTS. */
122 /* For good performance, keep above 1000 */
123 #define UART_FLUSH_TIME 3000
125 /* MEC timer control register bits */
130 #define TCR_TCRCR 0x100
131 #define TCR_TCRCL 0x200
132 #define TCR_TCRSE 0x400
133 #define TCR_TCRSL 0x800
135 /* New uart defines */
136 #define UART_TX_TIME 1000
137 #define UART_RX_TIME 1000
139 #define UARTA_SRE 0x2
140 #define UARTA_HRE 0x4
141 #define UARTA_OR 0x40
142 #define UARTA_CLR 0x80
143 #define UARTB_DR 0x10000
144 #define UARTB_SRE 0x20000
145 #define UARTB_HRE 0x40000
146 #define UARTB_OR 0x400000
147 #define UARTB_CLR 0x800000
149 #define UART_DR 0x100
150 #define UART_TSE 0x200
151 #define UART_THE 0x400
155 static char fname[256];
156 static int32 find = 0;
157 static uint32 mec_ssa[2]; /* Write protection start address */
158 static uint32 mec_sea[2]; /* Write protection end address */
159 static uint32 mec_wpr[2]; /* Write protection control fields */
160 static uint32 mec_sfsr;
161 static uint32 mec_ffar;
162 static uint32 mec_ipr;
163 static uint32 mec_imr;
164 static uint32 mec_isr;
165 static uint32 mec_icr;
166 static uint32 mec_ifr;
167 static uint32 mec_mcr; /* MEC control register */
168 static uint32 mec_memcfg; /* Memory control register */
169 static uint32 mec_wcr; /* MEC waitstate register */
170 static uint32 mec_iocr; /* MEC IO control register */
171 static uint32 posted_irq;
172 static uint32 mec_ersr; /* MEC error and status register */
173 static uint32 mec_tcr; /* MEC test comtrol register */
175 static uint32 rtc_counter;
176 static uint32 rtc_reload;
177 static uint32 rtc_scaler;
178 static uint32 rtc_scaler_start;
179 static uint32 rtc_enabled;
180 static uint32 rtc_cr;
181 static uint32 rtc_se;
183 static uint32 gpt_counter;
184 static uint32 gpt_reload;
185 static uint32 gpt_scaler;
186 static uint32 gpt_scaler_start;
187 static uint32 gpt_enabled;
188 static uint32 gpt_cr;
189 static uint32 gpt_se;
191 static uint32 wdog_scaler;
192 static uint32 wdog_counter;
193 static uint32 wdog_rst_delay;
194 static uint32 wdog_rston;
197 init, disabled, enabled, stopped
200 static enum wdog_type wdog_status;
203 /* ROM size 1024 Kbyte */
204 #define ROM_SZ 0x100000
205 #define ROM_MASK 0x0fffff
207 /* RAM size 4 Mbyte */
208 #define RAM_START 0x02000000
209 #define RAM_END 0x02400000
210 #define RAM_MASK 0x003fffff
212 /* SPARClite boards all seem to have RAM at the same place. */
213 #define RAM_START_SLITE 0x40000000
214 #define RAM_END_SLITE 0x40400000
215 #define RAM_MASK_SLITE 0x003fffff
217 /* Memory support variables */
219 static uint32 mem_ramr_ws; /* RAM read waitstates */
220 static uint32 mem_ramw_ws; /* RAM write waitstates */
221 static uint32 mem_romr_ws; /* ROM read waitstates */
222 static uint32 mem_romw_ws; /* ROM write waitstates */
223 static uint32 mem_ramstart; /* RAM start */
224 static uint32 mem_ramend; /* RAM end */
225 static uint32 mem_rammask; /* RAM address mask */
226 static uint32 mem_ramsz; /* RAM size */
227 static uint32 mem_romsz; /* ROM size */
228 static uint32 mem_accprot; /* RAM write protection enabled */
229 static uint32 mem_blockprot; /* RAM block write protection enabled */
231 static unsigned char romb[ROM_SZ];
232 static unsigned char ramb[RAM_END - RAM_START];
235 /* UART support variables */
237 static int32 fd1, fd2; /* file descriptor for input file */
238 static int32 Ucontrol; /* UART status register */
239 static unsigned char aq[UARTBUF], bq[UARTBUF];
240 static int32 anum, aind = 0;
241 static int32 bnum, bind = 0;
242 static char wbufa[UARTBUF], wbufb[UARTBUF];
243 static unsigned wnuma;
244 static unsigned wnumb;
245 static FILE *f1in, *f1out, *f2in, *f2out;
246 static struct termios ioc1, ioc2, iocold1, iocold2;
247 static int f1open = 0, f2open = 0;
249 static char uarta_sreg, uarta_hreg, uartb_sreg, uartb_hreg;
250 static uint32 uart_stat_reg;
251 static uint32 uarta_data, uartb_data;
258 /* Forward declarations */
260 static void decode_ersr PARAMS ((void));
262 static void iucomperr PARAMS ((void));
264 static void mecparerror PARAMS ((void));
265 static void decode_memcfg PARAMS ((void));
266 static void decode_wcr PARAMS ((void));
267 static void decode_mcr PARAMS ((void));
268 static void close_port PARAMS ((void));
269 static void mec_reset PARAMS ((void));
270 static void mec_intack PARAMS ((int32 level));
271 static void chk_irq PARAMS ((void));
272 static void mec_irq PARAMS ((int32 level));
273 static void set_sfsr PARAMS ((uint32 fault, uint32 addr,
274 uint32 asi, uint32 read));
275 static int32 mec_read PARAMS ((uint32 addr, uint32 asi, uint32 *data));
276 static int mec_write PARAMS ((uint32 addr, uint32 data));
277 static void port_init PARAMS ((void));
278 static uint32 read_uart PARAMS ((uint32 addr));
279 static void write_uart PARAMS ((uint32 addr, uint32 data));
280 static void flush_uart PARAMS ((void));
281 static void uarta_tx PARAMS ((void));
282 static void uartb_tx PARAMS ((void));
283 static void uart_rx PARAMS ((caddr_t arg));
284 static void uart_intr PARAMS ((caddr_t arg));
285 static void uart_irq_start PARAMS ((void));
286 static void wdog_intr PARAMS ((caddr_t arg));
287 static void wdog_start PARAMS ((void));
288 static void rtc_intr PARAMS ((caddr_t arg));
289 static void rtc_start PARAMS ((void));
290 static uint32 rtc_counter_read PARAMS ((void));
291 static void rtc_scaler_set PARAMS ((uint32 val));
292 static void rtc_reload_set PARAMS ((uint32 val));
293 static void gpt_intr PARAMS ((caddr_t arg));
294 static void gpt_start PARAMS ((void));
295 static uint32 gpt_counter_read PARAMS ((void));
296 static void gpt_scaler_set PARAMS ((uint32 val));
297 static void gpt_reload_set PARAMS ((uint32 val));
298 static void timer_ctrl PARAMS ((uint32 val));
299 static unsigned char *
300 get_mem_ptr PARAMS ((uint32 addr, uint32 size));
302 static void fetch_bytes PARAMS ((int asi, unsigned char *mem,
303 uint32 *data, int sz));
305 static void store_bytes PARAMS ((unsigned char *mem, uint32 *data, int sz));
318 /* Power-on reset init */
331 if (mec_ersr & 0x01) {
332 if (!(mec_mcr & 0x20)) {
333 if (mec_mcr & 0x40) {
337 printf("Error manager reset - IU in error mode\n");
342 printf("Error manager halt - IU in error mode\n");
347 if (mec_ersr & 0x04) {
348 if (!(mec_mcr & 0x200)) {
349 if (mec_mcr & 0x400) {
353 printf("Error manager reset - IU comparison error\n");
358 printf("Error manager halt - IU comparison error\n");
363 if (mec_ersr & 0x20) {
364 if (!(mec_mcr & 0x2000)) {
365 if (mec_mcr & 0x4000) {
369 printf("Error manager reset - MEC hardware error\n");
374 printf("Error manager halt - MEC hardware error\n");
398 /* IU error mode manager */
410 /* Check memory settings */
415 if (rom8) mec_memcfg &= ~0x20000;
416 else mec_memcfg |= 0x20000;
418 mem_ramsz = (256 * 1024) << ((mec_memcfg >> 10) & 7);
419 mem_romsz = (128 * 1024) << ((mec_memcfg >> 18) & 7);
421 if (sparclite_board) {
422 mem_ramstart = RAM_START_SLITE;
423 mem_ramend = RAM_END_SLITE;
424 mem_rammask = RAM_MASK_SLITE;
427 mem_ramstart = RAM_START;
428 mem_ramend = RAM_END;
429 mem_rammask = RAM_MASK;
432 printf("RAM start: 0x%x, RAM size: %d K, ROM size: %d K\n",
433 mem_ramstart, mem_ramsz >> 10, mem_romsz >> 10);
439 mem_ramr_ws = mec_wcr & 3;
440 mem_ramw_ws = (mec_wcr >> 2) & 3;
441 mem_romr_ws = (mec_wcr >> 4) & 0x0f;
443 if (mem_romr_ws > 0 ) mem_romr_ws--;
444 mem_romr_ws = 5 + (4*mem_romr_ws);
446 mem_romw_ws = (mec_wcr >> 8) & 0x0f;
448 printf("Waitstates = RAM read: %d, RAM write: %d, ROM read: %d, ROM write: %d\n",
449 mem_ramr_ws, mem_ramw_ws, mem_romr_ws, mem_romw_ws);
455 mem_accprot = (mec_wpr[0] | mec_wpr[1]);
456 mem_blockprot = (mec_mcr >> 3) & 1;
457 if (sis_verbose && mem_accprot)
458 printf("Memory block write protection enabled\n");
459 if (mec_mcr & 0x08000) {
463 if (sis_verbose && (mec_mcr & 2))
464 printf("Software reset enabled\n");
465 if (sis_verbose && (mec_mcr & 1))
466 printf("Power-down mode enabled\n");
469 /* Flush ports when simulator stops */
480 sim_stop(SIM_DESC sd)
489 if (f1open && f1in != stdin)
491 if (f2open && f2in != stdin)
507 for (i = 0; i < 2; i++)
508 mec_ssa[i] = mec_sea[i] = mec_wpr[i] = 0;
509 mec_mcr = 0x01350014;
518 mec_memcfg = 0x10000;
520 mec_ersr = 0; /* MEC error and status register */
521 mec_tcr = 0; /* MEC test comtrol register */
529 anum = aind = bnum = bind = 0;
531 uart_stat_reg = UARTA_SRE | UARTA_HRE | UARTB_SRE | UARTB_HRE;
532 uarta_data = uartb_data = UART_THE | UART_TSE;
534 rtc_counter = 0xffffffff;
535 rtc_reload = 0xffffffff;
541 gpt_counter = 0xffffffff;
542 gpt_reload = 0xffffffff;
549 wdog_rst_delay = 255;
550 wdog_counter = 0xffff;
569 printf("interrupt %d acknowledged\n", level);
570 irq_test = mec_tcr & 0x80000;
571 if ((irq_test) && (mec_ifr & (1 << level)))
572 mec_ifr &= ~(1 << level);
574 mec_ipr &= ~(1 << level);
586 if (mec_tcr & 0x80000) itmp = mec_ifr;
588 itmp = ((mec_ipr | itmp) & ~mec_imr) & 0x0fffe;
591 for (i = 15; i > 0; i--) {
592 if (((itmp >> i) & 1) != 0) {
593 if ((sis_verbose) && (i > old_irl))
594 printf("IU irl: %d\n", i);
596 set_int(i, mec_intack, i);
607 mec_ipr |= (1 << level);
612 set_sfsr(fault, addr, asi, read)
618 if ((asi == 0xa) || (asi == 0xb)) {
620 mec_sfsr = (fault << 3) | (!read << 15);
621 mec_sfsr |= ((mec_sfsr & 1) ^ 1) | (mec_sfsr & 1);
634 mec_read(addr, asi, data)
640 switch (addr & 0x0ff) {
642 case MEC_MCR: /* 0x00 */
646 case MEC_MEMCFG: /* 0x10 */
651 *data = mec_iocr; /* 0x14 */
654 case MEC_SSA1: /* 0x20 */
655 *data = mec_ssa[0] | (mec_wpr[0] << 23);
657 case MEC_SEA1: /* 0x24 */
660 case MEC_SSA2: /* 0x28 */
661 *data = mec_ssa[1] | (mec_wpr[1] << 23);
663 case MEC_SEA2: /* 0x2c */
667 case MEC_ISR: /* 0x44 */
671 case MEC_IPR: /* 0x48 */
675 case MEC_IMR: /* 0x4c */
679 case MEC_IFR: /* 0x54 */
683 case MEC_RTC_COUNTER: /* 0x80 */
684 *data = rtc_counter_read();
686 case MEC_RTC_SCALER: /* 0x84 */
688 *data = rtc_scaler - (now() - rtc_scaler_start);
693 case MEC_GPT_COUNTER: /* 0x88 */
694 *data = gpt_counter_read();
697 case MEC_GPT_SCALER: /* 0x8c */
699 *data = gpt_scaler - (now() - gpt_scaler_start);
705 case MEC_SFSR: /* 0xA0 */
709 case MEC_FFAR: /* 0xA4 */
716 strcpy(fname, "simload");
717 find = bfd_load(fname);
725 case MEC_ERSR: /* 0xB0 */
729 case MEC_TCR: /* 0xD0 */
733 case MEC_UARTA: /* 0xE0 */
734 case MEC_UARTB: /* 0xE4 */
736 set_sfsr(MEC_ACC, addr, asi, 1);
739 *data = read_uart(addr);
742 case MEC_UART_CTRL: /* 0xE8 */
744 *data = read_uart(addr);
748 set_sfsr(MEC_ACC, addr, asi, 1);
756 mec_write(addr, data)
761 printf("MEC write a: %08x, d: %08x\n",addr,data);
762 switch (addr & 0x0ff) {
767 if (mec_mcr & 0x08000) mecparerror();
775 printf(" Software reset issued\n");
781 if (mec_iocr & 0xC0C0C0C0) mecparerror();
784 case MEC_SSA1: /* 0x20 */
785 if (data & 0xFE000000) mecparerror();
786 mec_ssa[0] = data & 0x7fffff;
787 mec_wpr[0] = (data >> 23) & 0x03;
788 mem_accprot = mec_wpr[0] || mec_wpr[1];
789 if (sis_verbose && mec_wpr[0])
790 printf("Segment 1 memory protection enabled (0x02%06x - 0x02%06x)\n",
791 mec_ssa[0] << 2, mec_sea[0] << 2);
793 case MEC_SEA1: /* 0x24 */
794 if (data & 0xFF800000) mecparerror();
795 mec_sea[0] = data & 0x7fffff;
797 case MEC_SSA2: /* 0x28 */
798 if (data & 0xFE000000) mecparerror();
799 mec_ssa[1] = data & 0x7fffff;
800 mec_wpr[1] = (data >> 23) & 0x03;
801 mem_accprot = mec_wpr[0] || mec_wpr[1];
802 if (sis_verbose && mec_wpr[1])
803 printf("Segment 2 memory protection enabled (0x02%06x - 0x02%06x)\n",
804 mec_ssa[1] << 2, mec_sea[1] << 2);
806 case MEC_SEA2: /* 0x2c */
807 if (data & 0xFF800000) mecparerror();
808 mec_sea[1] = data & 0x7fffff;
813 if (data & 0xFFFFFF00) mecparerror();
815 if (data & 0xFF00FF00) mecparerror();
816 write_uart(addr, data);
820 gpt_reload_set(data);
824 if (data & 0xFFFF0000) mecparerror();
825 gpt_scaler_set(data);
829 if (data & 0xFFFFF0F0) mecparerror();
834 rtc_reload_set(data);
838 if (data & 0xFFFFFF00) mecparerror();
839 rtc_scaler_set(data);
842 case MEC_SFSR: /* 0xA0 */
843 if (data & 0xFFFF0880) mecparerror();
848 if (data & 0xFFFFE000) mecparerror();
852 case MEC_IMR: /* 0x4c */
854 if (data & 0xFFFF8001) mecparerror();
855 mec_imr = data & 0x7ffe;
859 case MEC_ICR: /* 0x50 */
861 if (data & 0xFFFF0001) mecparerror();
862 mec_ipr &= ~data & 0x0fffe;
866 case MEC_IFR: /* 0x54 */
868 if (mec_tcr & 0x080000) {
869 if (data & 0xFFFF0001) mecparerror();
870 mec_ifr = data & 0xfffe;
875 fname[find++] = (char) data;
879 case MEC_MEMCFG: /* 0x10 */
880 if (data & 0xC0E08000) mecparerror();
883 if (mec_memcfg & 0xc0e08000)
887 case MEC_WCR: /* 0x18 */
892 case MEC_ERSR: /* 0xB0 */
893 if (mec_tcr & 0x100000)
894 if (data & 0xFFFFEFC0) mecparerror();
895 mec_ersr = data & 0x103f;
898 case MEC_TCR: /* 0xD0 */
899 if (data & 0xFFE1FFC0) mecparerror();
900 mec_tcr = data & 0x1e003f;
903 case MEC_WDOG: /* 0x60 */
904 wdog_scaler = (data >> 16) & 0x0ff;
905 wdog_counter = data & 0x0ffff;
906 wdog_rst_delay = data >> 24;
908 if (wdog_status == stopped)
910 wdog_status = enabled;
913 case MEC_TRAPD: /* 0x64 */
914 if (wdog_status == init) {
915 wdog_status = disabled;
917 printf("Watchdog disabled\n");
927 set_sfsr(MEC_ACC, addr, 0xb, 0);
937 static int ifd1 = -1, ifd2 = -1, ofd1 = -1, ofd2 = -1;
943 return; /* do nothing */
945 tcsetattr(0, TCSANOW, &ioc1);
947 tcsetattr(0, TCSANOW, &ioc2);
954 return; /* do nothing */
956 tcsetattr(0, TCSANOW, &iocold1);
958 tcsetattr(0, TCSANOW, &iocold2);
961 #define DO_STDIO_READ( _fd_, _buf_, _len_ ) \
963 ? (0) /* no bytes read, no delay */ \
964 : read( _fd_, _buf_, _len_ ) )
982 if (uart_dev1[0] != 0)
983 if ((fd1 = open(uart_dev1, O_RDWR | O_NONBLOCK)) < 0) {
984 printf("Warning, couldn't open output device %s\n", uart_dev1);
987 printf("serial port A on %s\n", uart_dev1);
988 f1in = f1out = fdopen(fd1, "r+");
992 if (f1in) ifd1 = fileno(f1in);
995 printf("serial port A on stdin/stdout\n");
997 tcgetattr(ifd1, &ioc1);
999 ioc1.c_lflag &= ~(ICANON | ECHO);
1000 ioc1.c_cc[VMIN] = 0;
1001 ioc1.c_cc[VTIME] = 0;
1007 ofd1 = fileno(f1out);
1008 if (!dumbio && ofd1 == 1) setbuf(f1out, NULL);
1011 if (uart_dev2[0] != 0)
1012 if ((fd2 = open(uart_dev2, O_RDWR | O_NONBLOCK)) < 0) {
1013 printf("Warning, couldn't open output device %s\n", uart_dev2);
1016 printf("serial port B on %s\n", uart_dev2);
1017 f2in = f2out = fdopen(fd2, "r+");
1018 setbuf(f2out, NULL);
1021 if (f2in) ifd2 = fileno(f2in);
1024 printf("serial port B on stdin/stdout\n");
1026 tcgetattr(ifd2, &ioc2);
1028 ioc2.c_lflag &= ~(ICANON | ECHO);
1029 ioc2.c_cc[VMIN] = 0;
1030 ioc2.c_cc[VTIME] = 0;
1036 ofd2 = fileno(f2out);
1037 if (!dumbio && ofd2 == 1) setbuf(f2out, NULL);
1052 switch (addr & 0xff) {
1054 case 0xE0: /* UART 1 */
1059 if ((aind + 1) < anum)
1061 return (0x700 | (uint32) aq[aind++]);
1064 anum = DO_STDIO_READ(ifd1, aq, UARTBUF);
1068 if ((aind + 1) < anum)
1070 return (0x700 | (uint32) aq[aind++]);
1072 return (0x600 | (uint32) aq[aind]);
1078 uarta_data &= ~UART_DR;
1079 uart_stat_reg &= ~UARTA_DR;
1087 case 0xE4: /* UART 2 */
1091 if ((bind + 1) < bnum)
1093 return (0x700 | (uint32) bq[bind++]);
1096 bnum = DO_STDIO_READ(ifd2, bq, UARTBUF);
1100 if ((bind + 1) < bnum)
1102 return (0x700 | (uint32) bq[bind++]);
1104 return (0x600 | (uint32) bq[bind]);
1110 uartb_data &= ~UART_DR;
1111 uart_stat_reg &= ~UARTB_DR;
1119 case 0xE8: /* UART status register */
1125 Ucontrol |= 0x00000001;
1128 anum = DO_STDIO_READ(ifd1, aq, UARTBUF);
1131 Ucontrol |= 0x00000001;
1137 Ucontrol |= 0x00010000;
1140 bnum = DO_STDIO_READ(ifd2, bq, UARTBUF);
1143 Ucontrol |= 0x00010000;
1149 Ucontrol |= 0x00060006;
1152 return (uart_stat_reg);
1160 printf("Read from unimplemented MEC register (%x)\n", addr);
1167 write_uart(addr, data)
1173 c = (unsigned char) data;
1174 switch (addr & 0xff) {
1176 case 0xE0: /* UART A */
1179 if (wnuma < UARTBUF)
1183 wnuma -= fwrite(wbufa, 1, wnuma, f1out);
1189 if (uart_stat_reg & UARTA_SRE) {
1191 uart_stat_reg &= ~UARTA_SRE;
1192 event(uarta_tx, 0, UART_TX_TIME);
1195 uart_stat_reg &= ~UARTA_HRE;
1200 case 0xE4: /* UART B */
1203 if (wnumb < UARTBUF)
1207 wnumb -= fwrite(wbufb, 1, wnumb, f2out);
1213 if (uart_stat_reg & UARTB_SRE) {
1215 uart_stat_reg &= ~UARTB_SRE;
1216 event(uartb_tx, 0, UART_TX_TIME);
1219 uart_stat_reg &= ~UARTB_HRE;
1223 case 0xE8: /* UART status register */
1225 if (data & UARTA_CLR) {
1226 uart_stat_reg &= 0xFFFF0000;
1227 uart_stat_reg |= UARTA_SRE | UARTA_HRE;
1229 if (data & UARTB_CLR) {
1230 uart_stat_reg &= 0x0000FFFF;
1231 uart_stat_reg |= UARTB_SRE | UARTB_HRE;
1237 printf("Write to unimplemented MEC register (%x)\n", addr);
1245 while (wnuma && f1open)
1246 wnuma -= fwrite(wbufa, 1, wnuma, f1out);
1247 while (wnumb && f2open)
1248 wnumb -= fwrite(wbufb, 1, wnumb, f2out);
1257 while (f1open && fwrite(&uarta_sreg, 1, 1, f1out) != 1);
1258 if (uart_stat_reg & UARTA_HRE) {
1259 uart_stat_reg |= UARTA_SRE;
1261 uarta_sreg = uarta_hreg;
1262 uart_stat_reg |= UARTA_HRE;
1263 event(uarta_tx, 0, UART_TX_TIME);
1271 while (f2open && fwrite(&uartb_sreg, 1, 1, f2out) != 1);
1272 if (uart_stat_reg & UARTB_HRE) {
1273 uart_stat_reg |= UARTB_SRE;
1275 uartb_sreg = uartb_hreg;
1276 uart_stat_reg |= UARTB_HRE;
1277 event(uartb_tx, 0, UART_TX_TIME);
1292 rsize = DO_STDIO_READ(ifd1, &rxd, 1);
1294 uarta_data = UART_DR | rxd;
1295 if (uart_stat_reg & UARTA_HRE)
1296 uarta_data |= UART_THE;
1297 if (uart_stat_reg & UARTA_SRE)
1298 uarta_data |= UART_TSE;
1299 if (uart_stat_reg & UARTA_DR) {
1300 uart_stat_reg |= UARTA_OR;
1301 mec_irq(7); /* UART error interrupt */
1303 uart_stat_reg |= UARTA_DR;
1308 rsize = DO_STDIO_READ(ifd2, &rxd, 1);
1310 uartb_data = UART_DR | rxd;
1311 if (uart_stat_reg & UARTB_HRE)
1312 uartb_data |= UART_THE;
1313 if (uart_stat_reg & UARTB_SRE)
1314 uartb_data |= UART_TSE;
1315 if (uart_stat_reg & UARTB_DR) {
1316 uart_stat_reg |= UARTB_OR;
1317 mec_irq(7); /* UART error interrupt */
1319 uart_stat_reg |= UARTB_DR;
1322 event(uart_rx, 0, UART_RX_TIME);
1329 read_uart(0xE8); /* Check for UART interrupts every 1000 clk */
1330 flush_uart(); /* Flush UART ports */
1331 event(uart_intr, 0, UART_FLUSH_TIME);
1339 event(uart_intr, 0, UART_FLUSH_TIME);
1342 event(uart_rx, 0, UART_RX_TIME);
1353 if (wdog_status == disabled) {
1354 wdog_status = stopped;
1359 event(wdog_intr, 0, wdog_scaler + 1);
1362 printf("Watchdog reset!\n");
1368 wdog_counter = wdog_rst_delay;
1369 event(wdog_intr, 0, wdog_scaler + 1);
1378 event(wdog_intr, 0, wdog_scaler + 1);
1380 printf("Watchdog started, scaler = %d, counter = %d\n",
1381 wdog_scaler, wdog_counter);
1392 if (rtc_counter == 0) {
1396 rtc_counter = rtc_reload;
1402 event(rtc_intr, 0, rtc_scaler + 1);
1403 rtc_scaler_start = now();
1407 printf("RTC stopped\n\r");
1416 printf("RTC started (period %d)\n\r", rtc_scaler + 1);
1417 event(rtc_intr, 0, rtc_scaler + 1);
1418 rtc_scaler_start = now();
1425 return (rtc_counter);
1432 rtc_scaler = val & 0x0ff; /* eight-bit scaler only */
1446 if (gpt_counter == 0) {
1449 gpt_counter = gpt_reload;
1455 event(gpt_intr, 0, gpt_scaler + 1);
1456 gpt_scaler_start = now();
1460 printf("GPT stopped\n\r");
1469 printf("GPT started (period %d)\n\r", gpt_scaler + 1);
1470 event(gpt_intr, 0, gpt_scaler + 1);
1471 gpt_scaler_start = now();
1478 return (gpt_counter);
1485 gpt_scaler = val & 0x0ffff; /* 16-bit scaler */
1500 rtc_cr = ((val & TCR_TCRCR) != 0);
1501 if (val & TCR_TCRCL) {
1502 rtc_counter = rtc_reload;
1504 if (val & TCR_TCRSL) {
1506 rtc_se = ((val & TCR_TCRSE) != 0);
1507 if (rtc_se && (rtc_enabled == 0))
1510 gpt_cr = (val & TCR_GACR);
1511 if (val & TCR_GACL) {
1512 gpt_counter = gpt_reload;
1514 if (val & TCR_GACL) {
1516 gpt_se = (val & TCR_GASE) >> 2;
1517 if (gpt_se && (gpt_enabled == 0))
1522 /* Retrieve data from target memory. MEM points to location from which
1523 to read the data; DATA points to words where retrieved data will be
1524 stored in host byte order. SZ contains log(2) of the number of bytes
1525 to retrieve, and can be 0 (1 byte), 1 (one half-word), 2 (one word),
1526 or 3 (two words). */
1529 fetch_bytes (asi, mem, data, sz)
1535 if (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN
1536 || asi == 8 || asi == 9) {
1539 data[1] = (((uint32) mem[7]) & 0xff) |
1540 ((((uint32) mem[6]) & 0xff) << 8) |
1541 ((((uint32) mem[5]) & 0xff) << 16) |
1542 ((((uint32) mem[4]) & 0xff) << 24);
1543 /* Fall through to 2 */
1545 data[0] = (((uint32) mem[3]) & 0xff) |
1546 ((((uint32) mem[2]) & 0xff) << 8) |
1547 ((((uint32) mem[1]) & 0xff) << 16) |
1548 ((((uint32) mem[0]) & 0xff) << 24);
1551 data[0] = (((uint32) mem[1]) & 0xff) |
1552 ((((uint32) mem[0]) & 0xff) << 8);
1555 data[0] = mem[0] & 0xff;
1562 data[1] = ((((uint32) mem[7]) & 0xff) << 24) |
1563 ((((uint32) mem[6]) & 0xff) << 16) |
1564 ((((uint32) mem[5]) & 0xff) << 8) |
1565 (((uint32) mem[4]) & 0xff);
1566 /* Fall through to 4 */
1568 data[0] = ((((uint32) mem[3]) & 0xff) << 24) |
1569 ((((uint32) mem[2]) & 0xff) << 16) |
1570 ((((uint32) mem[1]) & 0xff) << 8) |
1571 (((uint32) mem[0]) & 0xff);
1574 data[0] = ((((uint32) mem[1]) & 0xff) << 8) |
1575 (((uint32) mem[0]) & 0xff);
1578 data[0] = mem[0] & 0xff;
1585 /* Store data in target byte order. MEM points to location to store data;
1586 DATA points to words in host byte order to be stored. SZ contains log(2)
1587 of the number of bytes to retrieve, and can be 0 (1 byte), 1 (one half-word),
1588 2 (one word), or 3 (two words). */
1591 store_bytes (mem, data, sz)
1596 if (CURRENT_TARGET_BYTE_ORDER == LITTLE_ENDIAN) {
1599 mem[7] = (data[1] >> 24) & 0xff;
1600 mem[6] = (data[1] >> 16) & 0xff;
1601 mem[5] = (data[1] >> 8) & 0xff;
1602 mem[4] = data[1] & 0xff;
1603 /* Fall through to 2 */
1605 mem[3] = (data[0] >> 24) & 0xff;
1606 mem[2] = (data[0] >> 16) & 0xff;
1607 /* Fall through to 1 */
1609 mem[1] = (data[0] >> 8) & 0xff;
1610 /* Fall through to 0 */
1612 mem[0] = data[0] & 0xff;
1618 mem[7] = data[1] & 0xff;
1619 mem[6] = (data[1] >> 8) & 0xff;
1620 mem[5] = (data[1] >> 16) & 0xff;
1621 mem[4] = (data[1] >> 24) & 0xff;
1622 /* Fall through to 2 */
1624 mem[3] = data[0] & 0xff;
1625 mem[2] = (data[0] >> 8) & 0xff;
1626 mem[1] = (data[0] >> 16) & 0xff;
1627 mem[0] = (data[0] >> 24) & 0xff;
1630 mem[1] = data[0] & 0xff;
1631 mem[0] = (data[0] >> 8) & 0xff;
1634 mem[0] = data[0] & 0xff;
1642 /* Memory emulation */
1645 memory_read(asi, addr, data, sz, ws)
1657 printf("Inserted MEC error %d\n",errmec);
1658 set_sfsr(errmec, addr, asi, 1);
1659 if (errmec == 5) mecparerror();
1660 if (errmec == 6) iucomperr();
1666 if ((addr >= mem_ramstart) && (addr < (mem_ramstart + mem_ramsz))) {
1667 fetch_bytes (asi, &ramb[addr & mem_rammask], data, sz);
1670 } else if ((addr >= MEC_START) && (addr < MEC_END)) {
1671 mexc = mec_read(addr, asi, data);
1673 set_sfsr(MEC_ACC, addr, asi, 1);
1683 if ((addr < 0x100000) ||
1684 ((addr>= 0x80000000) && (addr < 0x80100000))) {
1685 fetch_bytes (asi, &romb[addr & ROM_MASK], data, sz);
1688 } else if ((addr >= 0x10000000) &&
1689 (addr < (0x10000000 + (512 << (mec_iocr & 0x0f)))) &&
1690 (mec_iocr & 0x10)) {
1695 } else if (addr < mem_romsz) {
1696 fetch_bytes (asi, &romb[addr], data, sz);
1701 } else if (addr < mem_romsz) {
1702 fetch_bytes (asi, &romb[addr], data, sz);
1709 printf("Memory exception at %x (illegal address)\n", addr);
1710 set_sfsr(UIMP_ACC, addr, asi, 1);
1716 memory_write(asi, addr, data, sz, ws)
1734 printf("Inserted MEC error %d\n",errmec);
1735 set_sfsr(errmec, addr, asi, 0);
1736 if (errmec == 5) mecparerror();
1737 if (errmec == 6) iucomperr();
1743 if ((addr >= mem_ramstart) && (addr < (mem_ramstart + mem_ramsz))) {
1746 waddr = (addr & 0x7fffff) >> 2;
1747 for (i = 0; i < 2; i++)
1749 (((asi == 0xa) && (mec_wpr[i] & 1)) ||
1750 ((asi == 0xb) && (mec_wpr[i] & 2))) &&
1751 ((waddr >= mec_ssa[i]) && ((waddr | (sz == 3)) < mec_sea[i]));
1753 if (((mem_blockprot) && (wphit[0] || wphit[1])) ||
1754 ((!mem_blockprot) &&
1755 !((mec_wpr[0] && wphit[0]) || (mec_wpr[1] && wphit[1]))
1758 printf("Memory access protection error at 0x%08x\n", addr);
1759 set_sfsr(PROT_EXC, addr, asi, 0);
1765 store_bytes (&ramb[addr & mem_rammask], data, sz);
1770 *ws = mem_ramw_ws + 3;
1776 *ws = 2 * mem_ramw_ws + STD_WS;
1780 } else if ((addr >= MEC_START) && (addr < MEC_END)) {
1781 if ((sz != 2) || (asi != 0xb)) {
1782 set_sfsr(MEC_ACC, addr, asi, 0);
1786 mexc = mec_write(addr, *data);
1788 set_sfsr(MEC_ACC, addr, asi, 0);
1799 ((addr < 0x100000) || ((addr >= 0x80000000) && (addr < 0x80100000)))) {
1801 *ws = sz == 3 ? 8 : 4;
1802 store_bytes (&romb[addr], data, sz);
1804 } else if ((addr >= 0x10000000) &&
1805 (addr < (0x10000000 + (512 << (mec_iocr & 0x0f)))) &&
1806 (mec_iocr & 0x10)) {
1807 erareg = *data & 0x0e;
1811 } else if ((addr < mem_romsz) && (mec_memcfg & 0x10000) && (wrp) &&
1812 (((mec_memcfg & 0x20000) && (sz > 1)) ||
1813 (!(mec_memcfg & 0x20000) && (sz == 0)))) {
1815 *ws = mem_romw_ws + 1;
1817 *ws += mem_romw_ws + STD_WS;
1818 store_bytes (&romb[addr], data, sz);
1822 } else if ((addr < mem_romsz) && (mec_memcfg & 0x10000) && (wrp) &&
1823 (((mec_memcfg & 0x20000) && (sz > 1)) ||
1824 (!(mec_memcfg & 0x20000) && (sz == 0)))) {
1826 *ws = mem_romw_ws + 1;
1828 *ws += mem_romw_ws + STD_WS;
1829 store_bytes (&romb[addr], data, sz);
1837 set_sfsr(UIMP_ACC, addr, asi, 0);
1841 static unsigned char *
1842 get_mem_ptr(addr, size)
1846 if ((addr + size) < ROM_SZ) {
1847 return (&romb[addr]);
1848 } else if ((addr >= mem_ramstart) && ((addr + size) < mem_ramend)) {
1849 return (&ramb[addr & mem_rammask]);
1853 else if ((era) && ((addr <0x100000) ||
1854 ((addr >= (unsigned) 0x80000000) && ((addr + size) < (unsigned) 0x80100000)))) {
1855 return (&romb[addr & ROM_MASK]);
1859 return ((char *) -1);
1863 sis_memory_write(addr, data, length)
1865 const unsigned char *data;
1870 if ((mem = get_mem_ptr(addr, length)) == ((char *) -1))
1873 memcpy(mem, data, length);
1878 sis_memory_read(addr, data, length)
1885 if ((mem = get_mem_ptr(addr, length)) == ((char *) -1))
1888 memcpy(data, mem, length);