4 Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
6 This file is part of simavr.
8 simavr is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 simavr is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with simavr. If not, see <http://www.gnu.org/licenses/>.
31 #include "sim_vcd_file.h"
32 #include "avr_mcu_section.h"
35 #include "sim_core_decl.h"
37 int avr_init(avr_t * avr)
39 avr->flash = malloc(avr->flashend + 1);
40 memset(avr->flash, 0xff, avr->flashend + 1);
41 avr->data = malloc(avr->ramend + 1);
42 memset(avr->data, 0, avr->ramend + 1);
43 #ifdef CONFIG_SIMAVR_TRACE
44 avr->trace_data = calloc(1, sizeof(struct avr_trace_data_t));
47 // cpu is in limbo before init is finished.
48 avr->state = cpu_Limbo;
49 avr->frequency = 1000000; // can be overriden via avr_mcu_section
50 if (avr->special_init)
51 avr->special_init(avr);
54 // set default (non gdb) fast callbacks
55 avr->run = avr_callback_run_raw;
56 avr->sleep = avr_callback_sleep_raw;
57 avr->state = cpu_Running;
63 void avr_terminate(avr_t * avr)
65 if (avr->special_deinit)
66 avr->special_deinit(avr);
68 avr_vcd_close(avr->vcd);
71 avr_deallocate_ios(avr);
73 if (avr->flash) free(avr->flash);
74 if (avr->data) free(avr->data);
75 avr->flash = avr->data = NULL;
78 void avr_reset(avr_t * avr)
80 memset(avr->data, 0x0, avr->ramend + 1);
81 _avr_sp_set(avr, avr->ramend);
83 for (int i = 0; i < 8; i++)
87 avr_interrupt_reset(avr);
88 avr_cycle_timer_reset(avr);
89 avr_io_t * port = avr->io_port;
97 void avr_sadly_crashed(avr_t *avr, uint8_t signal)
99 printf("%s\n", __FUNCTION__);
100 avr->state = cpu_Stopped;
102 // enable gdb server, and wait
107 avr->state = cpu_Crashed;
110 static void _avr_io_command_write(struct avr_t * avr, avr_io_addr_t addr, uint8_t v, void * param)
112 printf("%s %02x\n", __FUNCTION__, v);
114 case SIMAVR_CMD_VCD_START_TRACE:
116 avr_vcd_start(avr->vcd);
118 case SIMAVR_CMD_VCD_STOP_TRACE:
120 avr_vcd_stop(avr->vcd);
122 case SIMAVR_CMD_UART_LOOPBACK: {
123 avr_irq_t * src = avr_io_getirq(avr, AVR_IOCTL_UART_GETIRQ('0'), UART_IRQ_OUTPUT);
124 avr_irq_t * dst = avr_io_getirq(avr, AVR_IOCTL_UART_GETIRQ('0'), UART_IRQ_INPUT);
126 printf("%s activating uart local echo IRQ src %p dst %p\n", __FUNCTION__, src, dst);
127 avr_connect_irq(src, dst);
134 void avr_set_command_register(avr_t * avr, avr_io_addr_t addr)
137 avr_register_io_write(avr, addr, _avr_io_command_write, NULL);
140 static void _avr_io_console_write(struct avr_t * avr, avr_io_addr_t addr, uint8_t v, void * param)
142 static char * buf = NULL;
143 static int size = 0, len = 0;
145 if (v == '\r' && buf) {
147 printf("O:" "%s" "" "\n", buf);
152 if (len + 1 >= size) {
154 buf = (char*)realloc(buf, size);
160 void avr_set_console_register(avr_t * avr, avr_io_addr_t addr)
163 avr_register_io_write(avr, addr, _avr_io_console_write, NULL);
166 void avr_loadcode(avr_t * avr, uint8_t * code, uint32_t size, uint32_t address)
168 if (size > avr->flashend+1) {
169 fprintf(stderr, "avr_loadcode(): Attempted to load code of size %d but flash size is only %d.\n",
170 size, avr->flashend+1);
173 memcpy(avr->flash + address, code, size);
176 void avr_callback_sleep_gdb(avr_t * avr, avr_cycle_count_t howLong)
178 uint32_t usec = avr_cycles_to_usec(avr, howLong);
179 while (avr_gdb_processor(avr, usec))
183 void avr_callback_run_gdb(avr_t * avr)
185 avr_gdb_processor(avr, avr->state == cpu_Stopped);
187 if (avr->state == cpu_Stopped)
190 // if we are stepping one instruction, we "run" for one..
191 int step = avr->state == cpu_Step;
193 avr->state = cpu_Running;
195 uint16_t new_pc = avr->pc;
197 if (avr->state == cpu_Running) {
198 new_pc = avr_run_one(avr);
199 #if CONFIG_SIMAVR_TRACE
204 // if we just re-enabled the interrupts...
205 // double buffer the I flag, to detect that edge
206 if (avr->sreg[S_I] && !avr->i_shadow)
207 avr->interrupts.pending_wait++;
208 avr->i_shadow = avr->sreg[S_I];
210 // run the cycle timers, get the suggested sleep time
211 // until the next timer is due
212 avr_cycle_count_t sleep = avr_cycle_timer_process(avr);
216 if (avr->state == cpu_Sleeping) {
217 if (!avr->sreg[S_I]) {
219 printf("simavr: sleeping with interrupts off, quitting gracefully\n");
221 avr->state = cpu_Done;
225 * try to sleep for as long as we can (?)
227 avr->sleep(avr, sleep);
228 avr->cycle += 1 + sleep;
230 // Interrupt servicing might change the PC too, during 'sleep'
231 if (avr->state == cpu_Running || avr->state == cpu_Sleeping)
232 avr_service_interrupts(avr);
234 // if we were stepping, use this state to inform remote gdb
236 avr->state = cpu_StepDone;
240 void avr_callback_sleep_raw(avr_t * avr, avr_cycle_count_t howLong)
242 uint32_t usec = avr_cycles_to_usec(avr, howLong);
246 void avr_callback_run_raw(avr_t * avr)
249 uint16_t new_pc = avr->pc;
251 if (avr->state == cpu_Running) {
252 new_pc = avr_run_one(avr);
253 #if CONFIG_SIMAVR_TRACE
258 // if we just re-enabled the interrupts...
259 // double buffer the I flag, to detect that edge
260 if (avr->sreg[S_I] && !avr->i_shadow)
261 avr->interrupts.pending_wait++;
262 avr->i_shadow = avr->sreg[S_I];
264 // run the cycle timers, get the suggested sleeo time
265 // until the next timer is due
266 avr_cycle_count_t sleep = avr_cycle_timer_process(avr);
270 if (avr->state == cpu_Sleeping) {
271 if (!avr->sreg[S_I]) {
273 printf("simavr: sleeping with interrupts off, quitting gracefully\n");
275 avr->state = cpu_Done;
279 * try to sleep for as long as we can (?)
281 avr->sleep(avr, sleep);
282 avr->cycle += 1 + sleep;
284 // Interrupt servicing might change the PC too, during 'sleep'
285 if (avr->state == cpu_Running || avr->state == cpu_Sleeping)
286 avr_service_interrupts(avr);
290 int avr_run(avr_t * avr)
297 extern avr_kind_t tiny13;
298 extern avr_kind_t tiny2313;
299 extern avr_kind_t tiny25,tiny45,tiny85;
300 extern avr_kind_t tiny24,tiny44,tiny84;
301 extern avr_kind_t mega8;
302 extern avr_kind_t mega48,mega88,mega168,mega328;
303 extern avr_kind_t mega164,mega324,mega644;
304 extern avr_kind_t mega128;
305 extern avr_kind_t mega1281;
306 extern avr_kind_t mega16m1;
307 extern avr_kind_t usb162;
309 avr_kind_t * avr_kind[] = {
312 &tiny25, &tiny45, &tiny85,
313 &tiny24, &tiny44, &tiny84,
315 &mega48, &mega88, &mega168, &mega328,
316 &mega164, &mega324, &mega644,
325 avr_t * avr_make_mcu_by_name(const char *name)
327 avr_kind_t * maker = NULL;
328 for (int i = 0; avr_kind[i] && !maker; i++) {
329 for (int j = 0; avr_kind[i]->names[j]; j++)
330 if (!strcmp(avr_kind[i]->names[j], name)) {
336 fprintf(stderr, "%s: AVR '%s' now known\n", __FUNCTION__, name);
340 avr_t * avr = maker->make();
341 printf("Starting %s - flashend %04x ramend %04x e2end %04x\n", avr->mmcu, avr->flashend, avr->ramend, avr->e2end);