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 */
25 #include <sys/types.h>
28 #include <sys/fcntl.h>
33 #include "sim-config.h"
36 extern int32 sis_verbose;
37 extern int32 sparclite, sparclite_board;
38 extern int rom8,wrp,uben;
39 extern char uart_dev1[], uart_dev2[];
41 int dumbio = 0; /* normal, smart, terminal oriented IO by default */
44 #define MEC_START 0x01f80000
45 #define MEC_END 0x01f80100
47 /* Memory exception waitstates */
50 /* ERC32 always adds one waitstate during RAM std */
57 /* The target's byte order is big-endian by default until we load a
58 little-endian program. */
60 int current_target_byte_order = BIG_ENDIAN;
62 #define MEC_WS 0 /* Waitstates per MEC access (0 ws) */
65 /* MEC register addresses */
69 #define MEC_PWDR 0x008
70 #define MEC_MEMCFG 0x010
71 #define MEC_IOCR 0x014
74 #define MEC_MAR0 0x020
75 #define MEC_MAR1 0x024
77 #define MEC_SSA1 0x020
78 #define MEC_SEA1 0x024
79 #define MEC_SSA2 0x028
80 #define MEC_SEA2 0x02C
86 #define MEC_WDOG 0x060
87 #define MEC_TRAPD 0x064
88 #define MEC_RTC_COUNTER 0x080
89 #define MEC_RTC_RELOAD 0x080
90 #define MEC_RTC_SCALER 0x084
91 #define MEC_GPT_COUNTER 0x088
92 #define MEC_GPT_RELOAD 0x088
93 #define MEC_GPT_SCALER 0x08C
94 #define MEC_TIMER_CTRL 0x098
95 #define MEC_SFSR 0x0A0
96 #define MEC_FFAR 0x0A4
97 #define MEC_ERSR 0x0B0
101 #define MEC_BRK 0x0C4
102 #define MEC_WPR 0x0C8
104 #define MEC_UARTA 0x0E0
105 #define MEC_UARTB 0x0E4
106 #define MEC_UART_CTRL 0x0E8
107 #define SIM_LOAD 0x0F0
109 /* Memory exception causes */
113 #define WATCH_EXC 0xa
114 #define BREAK_EXC 0xb
116 /* Size of UART buffers (bytes) */
119 /* Number of simulator ticks between flushing the UARTS. */
120 /* For good performance, keep above 1000 */
121 #define UART_FLUSH_TIME 3000
123 /* MEC timer control register bits */
128 #define TCR_TCRCR 0x100
129 #define TCR_TCRCL 0x200
130 #define TCR_TCRSE 0x400
131 #define TCR_TCRSL 0x800
133 /* New uart defines */
134 #define UART_TX_TIME 1000
135 #define UART_RX_TIME 1000
137 #define UARTA_SRE 0x2
138 #define UARTA_HRE 0x4
139 #define UARTA_OR 0x40
140 #define UARTA_CLR 0x80
141 #define UARTB_DR 0x10000
142 #define UARTB_SRE 0x20000
143 #define UARTB_HRE 0x40000
144 #define UARTB_OR 0x400000
145 #define UARTB_CLR 0x800000
147 #define UART_DR 0x100
148 #define UART_TSE 0x200
149 #define UART_THE 0x400
153 static char fname[256];
154 static int32 find = 0;
155 static uint32 mec_ssa[2]; /* Write protection start address */
156 static uint32 mec_sea[2]; /* Write protection end address */
157 static uint32 mec_wpr[2]; /* Write protection control fields */
158 static uint32 mec_sfsr;
159 static uint32 mec_ffar;
160 static uint32 mec_ipr;
161 static uint32 mec_imr;
162 static uint32 mec_isr;
163 static uint32 mec_icr;
164 static uint32 mec_ifr;
165 static uint32 mec_mcr; /* MEC control register */
166 static uint32 mec_memcfg; /* Memory control register */
167 static uint32 mec_wcr; /* MEC waitstate register */
168 static uint32 mec_iocr; /* MEC IO control register */
169 static uint32 posted_irq;
170 static uint32 mec_ersr; /* MEC error and status register */
171 static uint32 mec_tcr; /* MEC test comtrol register */
173 static uint32 rtc_counter;
174 static uint32 rtc_reload;
175 static uint32 rtc_scaler;
176 static uint32 rtc_scaler_start;
177 static uint32 rtc_enabled;
178 static uint32 rtc_cr;
179 static uint32 rtc_se;
181 static uint32 gpt_counter;
182 static uint32 gpt_reload;
183 static uint32 gpt_scaler;
184 static uint32 gpt_scaler_start;
185 static uint32 gpt_enabled;
186 static uint32 gpt_cr;
187 static uint32 gpt_se;
189 static uint32 wdog_scaler;
190 static uint32 wdog_counter;
191 static uint32 wdog_rst_delay;
192 static uint32 wdog_rston;
195 init, disabled, enabled, stopped
198 static enum wdog_type wdog_status;
201 /* ROM size 1024 Kbyte */
202 #define ROM_SZ 0x100000
203 #define ROM_MASK 0x0fffff
205 /* RAM size 4 Mbyte */
206 #define RAM_START 0x02000000
207 #define RAM_END 0x02400000
208 #define RAM_MASK 0x003fffff
210 /* SPARClite boards all seem to have RAM at the same place. */
211 #define RAM_START_SLITE 0x40000000
212 #define RAM_END_SLITE 0x40400000
213 #define RAM_MASK_SLITE 0x003fffff
215 /* Memory support variables */
217 static uint32 mem_ramr_ws; /* RAM read waitstates */
218 static uint32 mem_ramw_ws; /* RAM write waitstates */
219 static uint32 mem_romr_ws; /* ROM read waitstates */
220 static uint32 mem_romw_ws; /* ROM write waitstates */
221 static uint32 mem_ramstart; /* RAM start */
222 static uint32 mem_ramend; /* RAM end */
223 static uint32 mem_rammask; /* RAM address mask */
224 static uint32 mem_ramsz; /* RAM size */
225 static uint32 mem_romsz; /* ROM size */
226 static uint32 mem_accprot; /* RAM write protection enabled */
227 static uint32 mem_blockprot; /* RAM block write protection enabled */
229 static unsigned char romb[ROM_SZ];
230 static unsigned char ramb[RAM_END - RAM_START];
233 /* UART support variables */
235 static int32 fd1, fd2; /* file descriptor for input file */
236 static int32 Ucontrol; /* UART status register */
237 static unsigned char aq[UARTBUF], bq[UARTBUF];
238 static int32 anum, aind = 0;
239 static int32 bnum, bind = 0;
240 static char wbufa[UARTBUF], wbufb[UARTBUF];
241 static unsigned wnuma;
242 static unsigned wnumb;
243 static FILE *f1in, *f1out, *f2in, *f2out;
244 static struct termios ioc1, ioc2, iocold1, iocold2;
245 static int f1open = 0, f2open = 0;
247 static char uarta_sreg, uarta_hreg, uartb_sreg, uartb_hreg;
248 static uint32 uart_stat_reg;
249 static uint32 uarta_data, uartb_data;
256 /* Forward declarations */
258 static void decode_ersr PARAMS ((void));
260 static void iucomperr PARAMS ((void));
262 static void mecparerror PARAMS ((void));
263 static void decode_memcfg PARAMS ((void));
264 static void decode_wcr PARAMS ((void));
265 static void decode_mcr PARAMS ((void));
266 static void close_port PARAMS ((void));
267 static void mec_reset PARAMS ((void));
268 static void mec_intack PARAMS ((int32 level));
269 static void chk_irq PARAMS ((void));
270 static void mec_irq PARAMS ((int32 level));
271 static void set_sfsr PARAMS ((uint32 fault, uint32 addr,
272 uint32 asi, uint32 read));
273 static int32 mec_read PARAMS ((uint32 addr, uint32 asi, uint32 *data));
274 static int mec_write PARAMS ((uint32 addr, uint32 data));
275 static void port_init PARAMS ((void));
276 static uint32 read_uart PARAMS ((uint32 addr));
277 static void write_uart PARAMS ((uint32 addr, uint32 data));
278 static void flush_uart PARAMS ((void));
279 static void uarta_tx PARAMS ((void));
280 static void uartb_tx PARAMS ((void));
281 static void uart_rx PARAMS ((caddr_t arg));
282 static void uart_intr PARAMS ((caddr_t arg));
283 static void uart_irq_start PARAMS ((void));
284 static void wdog_intr PARAMS ((caddr_t arg));
285 static void wdog_start PARAMS ((void));
286 static void rtc_intr PARAMS ((caddr_t arg));
287 static void rtc_start PARAMS ((void));
288 static uint32 rtc_counter_read PARAMS ((void));
289 static void rtc_scaler_set PARAMS ((uint32 val));
290 static void rtc_reload_set PARAMS ((uint32 val));
291 static void gpt_intr PARAMS ((caddr_t arg));
292 static void gpt_start PARAMS ((void));
293 static uint32 gpt_counter_read PARAMS ((void));
294 static void gpt_scaler_set PARAMS ((uint32 val));
295 static void gpt_reload_set PARAMS ((uint32 val));
296 static void timer_ctrl PARAMS ((uint32 val));
297 static unsigned char *
298 get_mem_ptr PARAMS ((uint32 addr, uint32 size));
300 static void fetch_bytes PARAMS ((int asi, unsigned char *mem,
301 uint32 *data, int sz));
303 static void store_bytes PARAMS ((unsigned char *mem, uint32 *data, int sz));
316 /* Power-on reset init */
329 if (mec_ersr & 0x01) {
330 if (!(mec_mcr & 0x20)) {
331 if (mec_mcr & 0x40) {
335 printf("Error manager reset - IU in error mode\n");
340 printf("Error manager halt - IU in error mode\n");
345 if (mec_ersr & 0x04) {
346 if (!(mec_mcr & 0x200)) {
347 if (mec_mcr & 0x400) {
351 printf("Error manager reset - IU comparison error\n");
356 printf("Error manager halt - IU comparison error\n");
361 if (mec_ersr & 0x20) {
362 if (!(mec_mcr & 0x2000)) {
363 if (mec_mcr & 0x4000) {
367 printf("Error manager reset - MEC hardware error\n");
372 printf("Error manager halt - MEC hardware error\n");
396 /* IU error mode manager */
408 /* Check memory settings */
413 if (rom8) mec_memcfg &= ~0x20000;
414 else mec_memcfg |= 0x20000;
416 mem_ramsz = (256 * 1024) << ((mec_memcfg >> 10) & 7);
417 mem_romsz = (128 * 1024) << ((mec_memcfg >> 18) & 7);
419 if (sparclite_board) {
420 mem_ramstart = RAM_START_SLITE;
421 mem_ramend = RAM_END_SLITE;
422 mem_rammask = RAM_MASK_SLITE;
425 mem_ramstart = RAM_START;
426 mem_ramend = RAM_END;
427 mem_rammask = RAM_MASK;
430 printf("RAM start: 0x%x, RAM size: %d K, ROM size: %d K\n",
431 mem_ramstart, mem_ramsz >> 10, mem_romsz >> 10);
437 mem_ramr_ws = mec_wcr & 3;
438 mem_ramw_ws = (mec_wcr >> 2) & 3;
439 mem_romr_ws = (mec_wcr >> 4) & 0x0f;
441 if (mem_romr_ws > 0 ) mem_romr_ws--;
442 mem_romr_ws = 5 + (4*mem_romr_ws);
444 mem_romw_ws = (mec_wcr >> 8) & 0x0f;
446 printf("Waitstates = RAM read: %d, RAM write: %d, ROM read: %d, ROM write: %d\n",
447 mem_ramr_ws, mem_ramw_ws, mem_romr_ws, mem_romw_ws);
453 mem_accprot = (mec_wpr[0] | mec_wpr[1]);
454 mem_blockprot = (mec_mcr >> 3) & 1;
455 if (sis_verbose && mem_accprot)
456 printf("Memory block write protection enabled\n");
457 if (mec_mcr & 0x08000) {
461 if (sis_verbose && (mec_mcr & 2))
462 printf("Software reset enabled\n");
463 if (sis_verbose && (mec_mcr & 1))
464 printf("Power-down mode enabled\n");
467 /* Flush ports when simulator stops */
478 sim_stop(SIM_DESC sd)
487 if (f1open && f1in != stdin)
489 if (f2open && f2in != stdin)
505 for (i = 0; i < 2; i++)
506 mec_ssa[i] = mec_sea[i] = mec_wpr[i] = 0;
507 mec_mcr = 0x01350014;
516 mec_memcfg = 0x10000;
518 mec_ersr = 0; /* MEC error and status register */
519 mec_tcr = 0; /* MEC test comtrol register */
527 anum = aind = bnum = bind = 0;
529 uart_stat_reg = UARTA_SRE | UARTA_HRE | UARTB_SRE | UARTB_HRE;
530 uarta_data = uartb_data = UART_THE | UART_TSE;
532 rtc_counter = 0xffffffff;
533 rtc_reload = 0xffffffff;
539 gpt_counter = 0xffffffff;
540 gpt_reload = 0xffffffff;
547 wdog_rst_delay = 255;
548 wdog_counter = 0xffff;
567 printf("interrupt %d acknowledged\n", level);
568 irq_test = mec_tcr & 0x80000;
569 if ((irq_test) && (mec_ifr & (1 << level)))
570 mec_ifr &= ~(1 << level);
572 mec_ipr &= ~(1 << level);
584 if (mec_tcr & 0x80000) itmp = mec_ifr;
586 itmp = ((mec_ipr | itmp) & ~mec_imr) & 0x0fffe;
589 for (i = 15; i > 0; i--) {
590 if (((itmp >> i) & 1) != 0) {
591 if ((sis_verbose) && (i > old_irl))
592 printf("IU irl: %d\n", i);
594 set_int(i, mec_intack, i);
605 mec_ipr |= (1 << level);
610 set_sfsr(fault, addr, asi, read)
616 if ((asi == 0xa) || (asi == 0xb)) {
618 mec_sfsr = (fault << 3) | (!read << 15);
619 mec_sfsr |= ((mec_sfsr & 1) ^ 1) | (mec_sfsr & 1);
632 mec_read(addr, asi, data)
638 switch (addr & 0x0ff) {
640 case MEC_MCR: /* 0x00 */
644 case MEC_MEMCFG: /* 0x10 */
649 *data = mec_iocr; /* 0x14 */
652 case MEC_SSA1: /* 0x20 */
653 *data = mec_ssa[0] | (mec_wpr[0] << 23);
655 case MEC_SEA1: /* 0x24 */
658 case MEC_SSA2: /* 0x28 */
659 *data = mec_ssa[1] | (mec_wpr[1] << 23);
661 case MEC_SEA2: /* 0x2c */
665 case MEC_ISR: /* 0x44 */
669 case MEC_IPR: /* 0x48 */
673 case MEC_IMR: /* 0x4c */
677 case MEC_IFR: /* 0x54 */
681 case MEC_RTC_COUNTER: /* 0x80 */
682 *data = rtc_counter_read();
684 case MEC_RTC_SCALER: /* 0x84 */
686 *data = rtc_scaler - (now() - rtc_scaler_start);
691 case MEC_GPT_COUNTER: /* 0x88 */
692 *data = gpt_counter_read();
695 case MEC_GPT_SCALER: /* 0x8c */
697 *data = gpt_scaler - (now() - gpt_scaler_start);
703 case MEC_SFSR: /* 0xA0 */
707 case MEC_FFAR: /* 0xA4 */
714 strcpy(fname, "simload");
715 find = bfd_load(fname);
723 case MEC_ERSR: /* 0xB0 */
727 case MEC_TCR: /* 0xD0 */
731 case MEC_UARTA: /* 0xE0 */
732 case MEC_UARTB: /* 0xE4 */
734 set_sfsr(MEC_ACC, addr, asi, 1);
737 *data = read_uart(addr);
740 case MEC_UART_CTRL: /* 0xE8 */
742 *data = read_uart(addr);
746 set_sfsr(MEC_ACC, addr, asi, 1);
754 mec_write(addr, data)
759 printf("MEC write a: %08x, d: %08x\n",addr,data);
760 switch (addr & 0x0ff) {
765 if (mec_mcr & 0x08000) mecparerror();
773 printf(" Software reset issued\n");
779 if (mec_iocr & 0xC0C0C0C0) mecparerror();
782 case MEC_SSA1: /* 0x20 */
783 if (data & 0xFE000000) mecparerror();
784 mec_ssa[0] = data & 0x7fffff;
785 mec_wpr[0] = (data >> 23) & 0x03;
786 mem_accprot = mec_wpr[0] || mec_wpr[1];
787 if (sis_verbose && mec_wpr[0])
788 printf("Segment 1 memory protection enabled (0x02%06x - 0x02%06x)\n",
789 mec_ssa[0] << 2, mec_sea[0] << 2);
791 case MEC_SEA1: /* 0x24 */
792 if (data & 0xFF800000) mecparerror();
793 mec_sea[0] = data & 0x7fffff;
795 case MEC_SSA2: /* 0x28 */
796 if (data & 0xFE000000) mecparerror();
797 mec_ssa[1] = data & 0x7fffff;
798 mec_wpr[1] = (data >> 23) & 0x03;
799 mem_accprot = mec_wpr[0] || mec_wpr[1];
800 if (sis_verbose && mec_wpr[1])
801 printf("Segment 2 memory protection enabled (0x02%06x - 0x02%06x)\n",
802 mec_ssa[1] << 2, mec_sea[1] << 2);
804 case MEC_SEA2: /* 0x2c */
805 if (data & 0xFF800000) mecparerror();
806 mec_sea[1] = data & 0x7fffff;
811 if (data & 0xFFFFFF00) mecparerror();
813 if (data & 0xFF00FF00) mecparerror();
814 write_uart(addr, data);
818 gpt_reload_set(data);
822 if (data & 0xFFFF0000) mecparerror();
823 gpt_scaler_set(data);
827 if (data & 0xFFFFF0F0) mecparerror();
832 rtc_reload_set(data);
836 if (data & 0xFFFFFF00) mecparerror();
837 rtc_scaler_set(data);
840 case MEC_SFSR: /* 0xA0 */
841 if (data & 0xFFFF0880) mecparerror();
846 if (data & 0xFFFFE000) mecparerror();
850 case MEC_IMR: /* 0x4c */
852 if (data & 0xFFFF8001) mecparerror();
853 mec_imr = data & 0x7ffe;
857 case MEC_ICR: /* 0x50 */
859 if (data & 0xFFFF0001) mecparerror();
860 mec_ipr &= ~data & 0x0fffe;
864 case MEC_IFR: /* 0x54 */
866 if (mec_tcr & 0x080000) {
867 if (data & 0xFFFF0001) mecparerror();
868 mec_ifr = data & 0xfffe;
873 fname[find++] = (char) data;
877 case MEC_MEMCFG: /* 0x10 */
878 if (data & 0xC0E08000) mecparerror();
881 if (mec_memcfg & 0xc0e08000)
885 case MEC_WCR: /* 0x18 */
890 case MEC_ERSR: /* 0xB0 */
891 if (mec_tcr & 0x100000)
892 if (data & 0xFFFFEFC0) mecparerror();
893 mec_ersr = data & 0x103f;
896 case MEC_TCR: /* 0xD0 */
897 if (data & 0xFFE1FFC0) mecparerror();
898 mec_tcr = data & 0x1e003f;
901 case MEC_WDOG: /* 0x60 */
902 wdog_scaler = (data >> 16) & 0x0ff;
903 wdog_counter = data & 0x0ffff;
904 wdog_rst_delay = data >> 24;
906 if (wdog_status == stopped)
908 wdog_status = enabled;
911 case MEC_TRAPD: /* 0x64 */
912 if (wdog_status == init) {
913 wdog_status = disabled;
915 printf("Watchdog disabled\n");
925 set_sfsr(MEC_ACC, addr, 0xb, 0);
935 static int ifd1 = -1, ifd2 = -1, ofd1 = -1, ofd2 = -1;
941 return; /* do nothing */
943 tcsetattr(0, TCSANOW, &ioc1);
945 tcsetattr(0, TCSANOW, &ioc2);
952 return; /* do nothing */
954 tcsetattr(0, TCSANOW, &iocold1);
956 tcsetattr(0, TCSANOW, &iocold2);
959 #define DO_STDIO_READ( _fd_, _buf_, _len_ ) \
961 ? (0) /* no bytes read, no delay */ \
962 : read( _fd_, _buf_, _len_ ) )
980 if (uart_dev1[0] != 0)
981 if ((fd1 = open(uart_dev1, O_RDWR | O_NONBLOCK)) < 0) {
982 printf("Warning, couldn't open output device %s\n", uart_dev1);
985 printf("serial port A on %s\n", uart_dev1);
986 f1in = f1out = fdopen(fd1, "r+");
990 if (f1in) ifd1 = fileno(f1in);
993 printf("serial port A on stdin/stdout\n");
995 tcgetattr(ifd1, &ioc1);
997 ioc1.c_lflag &= ~(ICANON | ECHO);
999 ioc1.c_cc[VTIME] = 0;
1005 ofd1 = fileno(f1out);
1006 if (!dumbio && ofd1 == 1) setbuf(f1out, NULL);
1009 if (uart_dev2[0] != 0)
1010 if ((fd2 = open(uart_dev2, O_RDWR | O_NONBLOCK)) < 0) {
1011 printf("Warning, couldn't open output device %s\n", uart_dev2);
1014 printf("serial port B on %s\n", uart_dev2);
1015 f2in = f2out = fdopen(fd2, "r+");
1016 setbuf(f2out, NULL);
1019 if (f2in) ifd2 = fileno(f2in);
1022 printf("serial port B on stdin/stdout\n");
1024 tcgetattr(ifd2, &ioc2);
1026 ioc2.c_lflag &= ~(ICANON | ECHO);
1027 ioc2.c_cc[VMIN] = 0;
1028 ioc2.c_cc[VTIME] = 0;
1034 ofd2 = fileno(f2out);
1035 if (!dumbio && ofd2 == 1) setbuf(f2out, NULL);
1050 switch (addr & 0xff) {
1052 case 0xE0: /* UART 1 */
1057 if ((aind + 1) < anum)
1059 return (0x700 | (uint32) aq[aind++]);
1062 anum = DO_STDIO_READ(ifd1, aq, UARTBUF);
1066 if ((aind + 1) < anum)
1068 return (0x700 | (uint32) aq[aind++]);
1070 return (0x600 | (uint32) aq[aind]);
1076 uarta_data &= ~UART_DR;
1077 uart_stat_reg &= ~UARTA_DR;
1085 case 0xE4: /* UART 2 */
1089 if ((bind + 1) < bnum)
1091 return (0x700 | (uint32) bq[bind++]);
1094 bnum = DO_STDIO_READ(ifd2, bq, UARTBUF);
1098 if ((bind + 1) < bnum)
1100 return (0x700 | (uint32) bq[bind++]);
1102 return (0x600 | (uint32) bq[bind]);
1108 uartb_data &= ~UART_DR;
1109 uart_stat_reg &= ~UARTB_DR;
1117 case 0xE8: /* UART status register */
1123 Ucontrol |= 0x00000001;
1126 anum = DO_STDIO_READ(ifd1, aq, UARTBUF);
1129 Ucontrol |= 0x00000001;
1135 Ucontrol |= 0x00010000;
1138 bnum = DO_STDIO_READ(ifd2, bq, UARTBUF);
1141 Ucontrol |= 0x00010000;
1147 Ucontrol |= 0x00060006;
1150 return (uart_stat_reg);
1158 printf("Read from unimplemented MEC register (%x)\n", addr);
1165 write_uart(addr, data)
1171 c = (unsigned char) data;
1172 switch (addr & 0xff) {
1174 case 0xE0: /* UART A */
1177 if (wnuma < UARTBUF)
1181 wnuma -= fwrite(wbufa, 1, wnuma, f1out);
1187 if (uart_stat_reg & UARTA_SRE) {
1189 uart_stat_reg &= ~UARTA_SRE;
1190 event(uarta_tx, 0, UART_TX_TIME);
1193 uart_stat_reg &= ~UARTA_HRE;
1198 case 0xE4: /* UART B */
1201 if (wnumb < UARTBUF)
1205 wnumb -= fwrite(wbufb, 1, wnumb, f2out);
1211 if (uart_stat_reg & UARTB_SRE) {
1213 uart_stat_reg &= ~UARTB_SRE;
1214 event(uartb_tx, 0, UART_TX_TIME);
1217 uart_stat_reg &= ~UARTB_HRE;
1221 case 0xE8: /* UART status register */
1223 if (data & UARTA_CLR) {
1224 uart_stat_reg &= 0xFFFF0000;
1225 uart_stat_reg |= UARTA_SRE | UARTA_HRE;
1227 if (data & UARTB_CLR) {
1228 uart_stat_reg &= 0x0000FFFF;
1229 uart_stat_reg |= UARTB_SRE | UARTB_HRE;
1235 printf("Write to unimplemented MEC register (%x)\n", addr);
1243 while (wnuma && f1open)
1244 wnuma -= fwrite(wbufa, 1, wnuma, f1out);
1245 while (wnumb && f2open)
1246 wnumb -= fwrite(wbufb, 1, wnumb, f2out);
1255 while (f1open && fwrite(&uarta_sreg, 1, 1, f1out) != 1);
1256 if (uart_stat_reg & UARTA_HRE) {
1257 uart_stat_reg |= UARTA_SRE;
1259 uarta_sreg = uarta_hreg;
1260 uart_stat_reg |= UARTA_HRE;
1261 event(uarta_tx, 0, UART_TX_TIME);
1269 while (f2open && fwrite(&uartb_sreg, 1, 1, f2out) != 1);
1270 if (uart_stat_reg & UARTB_HRE) {
1271 uart_stat_reg |= UARTB_SRE;
1273 uartb_sreg = uartb_hreg;
1274 uart_stat_reg |= UARTB_HRE;
1275 event(uartb_tx, 0, UART_TX_TIME);
1290 rsize = DO_STDIO_READ(ifd1, &rxd, 1);
1292 uarta_data = UART_DR | rxd;
1293 if (uart_stat_reg & UARTA_HRE)
1294 uarta_data |= UART_THE;
1295 if (uart_stat_reg & UARTA_SRE)
1296 uarta_data |= UART_TSE;
1297 if (uart_stat_reg & UARTA_DR) {
1298 uart_stat_reg |= UARTA_OR;
1299 mec_irq(7); /* UART error interrupt */
1301 uart_stat_reg |= UARTA_DR;
1306 rsize = DO_STDIO_READ(ifd2, &rxd, 1);
1308 uartb_data = UART_DR | rxd;
1309 if (uart_stat_reg & UARTB_HRE)
1310 uartb_data |= UART_THE;
1311 if (uart_stat_reg & UARTB_SRE)
1312 uartb_data |= UART_TSE;
1313 if (uart_stat_reg & UARTB_DR) {
1314 uart_stat_reg |= UARTB_OR;
1315 mec_irq(7); /* UART error interrupt */
1317 uart_stat_reg |= UARTB_DR;
1320 event(uart_rx, 0, UART_RX_TIME);
1327 read_uart(0xE8); /* Check for UART interrupts every 1000 clk */
1328 flush_uart(); /* Flush UART ports */
1329 event(uart_intr, 0, UART_FLUSH_TIME);
1337 event(uart_intr, 0, UART_FLUSH_TIME);
1340 event(uart_rx, 0, UART_RX_TIME);
1351 if (wdog_status == disabled) {
1352 wdog_status = stopped;
1357 event(wdog_intr, 0, wdog_scaler + 1);
1360 printf("Watchdog reset!\n");
1366 wdog_counter = wdog_rst_delay;
1367 event(wdog_intr, 0, wdog_scaler + 1);
1376 event(wdog_intr, 0, wdog_scaler + 1);
1378 printf("Watchdog started, scaler = %d, counter = %d\n",
1379 wdog_scaler, wdog_counter);
1390 if (rtc_counter == 0) {
1394 rtc_counter = rtc_reload;
1400 event(rtc_intr, 0, rtc_scaler + 1);
1401 rtc_scaler_start = now();
1405 printf("RTC stopped\n\r");
1414 printf("RTC started (period %d)\n\r", rtc_scaler + 1);
1415 event(rtc_intr, 0, rtc_scaler + 1);
1416 rtc_scaler_start = now();
1423 return (rtc_counter);
1430 rtc_scaler = val & 0x0ff; /* eight-bit scaler only */
1444 if (gpt_counter == 0) {
1447 gpt_counter = gpt_reload;
1453 event(gpt_intr, 0, gpt_scaler + 1);
1454 gpt_scaler_start = now();
1458 printf("GPT stopped\n\r");
1467 printf("GPT started (period %d)\n\r", gpt_scaler + 1);
1468 event(gpt_intr, 0, gpt_scaler + 1);
1469 gpt_scaler_start = now();
1476 return (gpt_counter);
1483 gpt_scaler = val & 0x0ffff; /* 16-bit scaler */
1498 rtc_cr = ((val & TCR_TCRCR) != 0);
1499 if (val & TCR_TCRCL) {
1500 rtc_counter = rtc_reload;
1502 if (val & TCR_TCRSL) {
1504 rtc_se = ((val & TCR_TCRSE) != 0);
1505 if (rtc_se && (rtc_enabled == 0))
1508 gpt_cr = (val & TCR_GACR);
1509 if (val & TCR_GACL) {
1510 gpt_counter = gpt_reload;
1512 if (val & TCR_GACL) {
1514 gpt_se = (val & TCR_GASE) >> 2;
1515 if (gpt_se && (gpt_enabled == 0))
1520 /* Retrieve data from target memory. MEM points to location from which
1521 to read the data; DATA points to words where retrieved data will be
1522 stored in host byte order. SZ contains log(2) of the number of bytes
1523 to retrieve, and can be 0 (1 byte), 1 (one half-word), 2 (one word),
1524 or 3 (two words). */
1527 fetch_bytes (asi, mem, data, sz)
1533 if (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN
1534 || asi == 8 || asi == 9) {
1537 data[1] = (((uint32) mem[7]) & 0xff) |
1538 ((((uint32) mem[6]) & 0xff) << 8) |
1539 ((((uint32) mem[5]) & 0xff) << 16) |
1540 ((((uint32) mem[4]) & 0xff) << 24);
1541 /* Fall through to 2 */
1543 data[0] = (((uint32) mem[3]) & 0xff) |
1544 ((((uint32) mem[2]) & 0xff) << 8) |
1545 ((((uint32) mem[1]) & 0xff) << 16) |
1546 ((((uint32) mem[0]) & 0xff) << 24);
1549 data[0] = (((uint32) mem[1]) & 0xff) |
1550 ((((uint32) mem[0]) & 0xff) << 8);
1553 data[0] = mem[0] & 0xff;
1560 data[1] = ((((uint32) mem[7]) & 0xff) << 24) |
1561 ((((uint32) mem[6]) & 0xff) << 16) |
1562 ((((uint32) mem[5]) & 0xff) << 8) |
1563 (((uint32) mem[4]) & 0xff);
1564 /* Fall through to 4 */
1566 data[0] = ((((uint32) mem[3]) & 0xff) << 24) |
1567 ((((uint32) mem[2]) & 0xff) << 16) |
1568 ((((uint32) mem[1]) & 0xff) << 8) |
1569 (((uint32) mem[0]) & 0xff);
1572 data[0] = ((((uint32) mem[1]) & 0xff) << 8) |
1573 (((uint32) mem[0]) & 0xff);
1576 data[0] = mem[0] & 0xff;
1583 /* Store data in target byte order. MEM points to location to store data;
1584 DATA points to words in host byte order to be stored. SZ contains log(2)
1585 of the number of bytes to retrieve, and can be 0 (1 byte), 1 (one half-word),
1586 2 (one word), or 3 (two words). */
1589 store_bytes (mem, data, sz)
1594 if (CURRENT_TARGET_BYTE_ORDER == LITTLE_ENDIAN) {
1597 mem[7] = (data[1] >> 24) & 0xff;
1598 mem[6] = (data[1] >> 16) & 0xff;
1599 mem[5] = (data[1] >> 8) & 0xff;
1600 mem[4] = data[1] & 0xff;
1601 /* Fall through to 2 */
1603 mem[3] = (data[0] >> 24) & 0xff;
1604 mem[2] = (data[0] >> 16) & 0xff;
1605 /* Fall through to 1 */
1607 mem[1] = (data[0] >> 8) & 0xff;
1608 /* Fall through to 0 */
1610 mem[0] = data[0] & 0xff;
1616 mem[7] = data[1] & 0xff;
1617 mem[6] = (data[1] >> 8) & 0xff;
1618 mem[5] = (data[1] >> 16) & 0xff;
1619 mem[4] = (data[1] >> 24) & 0xff;
1620 /* Fall through to 2 */
1622 mem[3] = data[0] & 0xff;
1623 mem[2] = (data[0] >> 8) & 0xff;
1624 mem[1] = (data[0] >> 16) & 0xff;
1625 mem[0] = (data[0] >> 24) & 0xff;
1628 mem[1] = data[0] & 0xff;
1629 mem[0] = (data[0] >> 8) & 0xff;
1632 mem[0] = data[0] & 0xff;
1640 /* Memory emulation */
1643 memory_read(asi, addr, data, sz, ws)
1655 printf("Inserted MEC error %d\n",errmec);
1656 set_sfsr(errmec, addr, asi, 1);
1657 if (errmec == 5) mecparerror();
1658 if (errmec == 6) iucomperr();
1664 if ((addr >= mem_ramstart) && (addr < (mem_ramstart + mem_ramsz))) {
1665 fetch_bytes (asi, &ramb[addr & mem_rammask], data, sz);
1668 } else if ((addr >= MEC_START) && (addr < MEC_END)) {
1669 mexc = mec_read(addr, asi, data);
1671 set_sfsr(MEC_ACC, addr, asi, 1);
1681 if ((addr < 0x100000) ||
1682 ((addr>= 0x80000000) && (addr < 0x80100000))) {
1683 fetch_bytes (asi, &romb[addr & ROM_MASK], data, sz);
1686 } else if ((addr >= 0x10000000) &&
1687 (addr < (0x10000000 + (512 << (mec_iocr & 0x0f)))) &&
1688 (mec_iocr & 0x10)) {
1693 } else if (addr < mem_romsz) {
1694 fetch_bytes (asi, &romb[addr], data, sz);
1699 } else if (addr < mem_romsz) {
1700 fetch_bytes (asi, &romb[addr], data, sz);
1707 printf("Memory exception at %x (illegal address)\n", addr);
1708 set_sfsr(UIMP_ACC, addr, asi, 1);
1714 memory_write(asi, addr, data, sz, ws)
1732 printf("Inserted MEC error %d\n",errmec);
1733 set_sfsr(errmec, addr, asi, 0);
1734 if (errmec == 5) mecparerror();
1735 if (errmec == 6) iucomperr();
1741 if ((addr >= mem_ramstart) && (addr < (mem_ramstart + mem_ramsz))) {
1744 waddr = (addr & 0x7fffff) >> 2;
1745 for (i = 0; i < 2; i++)
1747 (((asi == 0xa) && (mec_wpr[i] & 1)) ||
1748 ((asi == 0xb) && (mec_wpr[i] & 2))) &&
1749 ((waddr >= mec_ssa[i]) && ((waddr | (sz == 3)) < mec_sea[i]));
1751 if (((mem_blockprot) && (wphit[0] || wphit[1])) ||
1752 ((!mem_blockprot) &&
1753 !((mec_wpr[0] && wphit[0]) || (mec_wpr[1] && wphit[1]))
1756 printf("Memory access protection error at 0x%08x\n", addr);
1757 set_sfsr(PROT_EXC, addr, asi, 0);
1763 store_bytes (&ramb[addr & mem_rammask], data, sz);
1768 *ws = mem_ramw_ws + 3;
1774 *ws = 2 * mem_ramw_ws + STD_WS;
1778 } else if ((addr >= MEC_START) && (addr < MEC_END)) {
1779 if ((sz != 2) || (asi != 0xb)) {
1780 set_sfsr(MEC_ACC, addr, asi, 0);
1784 mexc = mec_write(addr, *data);
1786 set_sfsr(MEC_ACC, addr, asi, 0);
1797 ((addr < 0x100000) || ((addr >= 0x80000000) && (addr < 0x80100000)))) {
1799 *ws = sz == 3 ? 8 : 4;
1800 store_bytes (&romb[addr], data, sz);
1802 } else if ((addr >= 0x10000000) &&
1803 (addr < (0x10000000 + (512 << (mec_iocr & 0x0f)))) &&
1804 (mec_iocr & 0x10)) {
1805 erareg = *data & 0x0e;
1809 } else if ((addr < mem_romsz) && (mec_memcfg & 0x10000) && (wrp) &&
1810 (((mec_memcfg & 0x20000) && (sz > 1)) ||
1811 (!(mec_memcfg & 0x20000) && (sz == 0)))) {
1813 *ws = mem_romw_ws + 1;
1815 *ws += mem_romw_ws + STD_WS;
1816 store_bytes (&romb[addr], data, sz);
1820 } else if ((addr < mem_romsz) && (mec_memcfg & 0x10000) && (wrp) &&
1821 (((mec_memcfg & 0x20000) && (sz > 1)) ||
1822 (!(mec_memcfg & 0x20000) && (sz == 0)))) {
1824 *ws = mem_romw_ws + 1;
1826 *ws += mem_romw_ws + STD_WS;
1827 store_bytes (&romb[addr], data, sz);
1835 set_sfsr(UIMP_ACC, addr, asi, 0);
1839 static unsigned char *
1840 get_mem_ptr(addr, size)
1844 if ((addr + size) < ROM_SZ) {
1845 return (&romb[addr]);
1846 } else if ((addr >= mem_ramstart) && ((addr + size) < mem_ramend)) {
1847 return (&ramb[addr & mem_rammask]);
1851 else if ((era) && ((addr <0x100000) ||
1852 ((addr >= (unsigned) 0x80000000) && ((addr + size) < (unsigned) 0x80100000)))) {
1853 return (&romb[addr & ROM_MASK]);
1857 return ((char *) -1);
1861 sis_memory_write(addr, data, length)
1868 if ((mem = get_mem_ptr(addr, length)) == ((char *) -1))
1871 memcpy(mem, data, length);
1876 sis_memory_read(addr, data, length)
1883 if ((mem = get_mem_ptr(addr, length)) == ((char *) -1))
1886 memcpy(data, mem, length);