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/>.
30 #include "sim_vcd_file.h"
31 #include "avr_mcu_section.h"
34 int avr_init(avr_t * avr)
36 avr->flash = malloc(avr->flashend + 1);
37 memset(avr->flash, 0xff, avr->flashend + 1);
38 avr->data = malloc(avr->ramend + 1);
39 memset(avr->data, 0, avr->ramend + 1);
40 #ifdef CONFIG_SIMAVR_TRACE
41 avr->trace_data = calloc(1, sizeof(struct avr_trace_data_t));
44 // cpu is in limbo before init is finished.
45 avr->state = cpu_Limbo;
46 avr->frequency = 1000000; // can be overriden via avr_mcu_section
47 if (avr->special_init)
48 avr->special_init(avr);
51 // set default (non gdb) fast callbacks
52 avr->run = avr_callback_run_raw;
53 avr->sleep = avr_callback_sleep_raw;
54 avr->state = cpu_Running;
60 void avr_terminate(avr_t * avr)
62 if (avr->special_deinit)
63 avr->special_deinit(avr);
65 avr_vcd_close(avr->vcd);
68 avr_deallocate_ios(avr);
70 if (avr->flash) free(avr->flash);
71 if (avr->data) free(avr->data);
72 avr->flash = avr->data = NULL;
75 void avr_reset(avr_t * avr)
77 memset(avr->data, 0x0, avr->ramend + 1);
78 _avr_sp_set(avr, avr->ramend);
80 for (int i = 0; i < 8; i++)
85 avr_io_t * port = avr->io_port;
93 void avr_sadly_crashed(avr_t *avr, uint8_t signal)
95 printf("%s\n", __FUNCTION__);
96 avr->state = cpu_Stopped;
98 // enable gdb server, and wait
103 avr->state = cpu_Crashed;
106 static void _avr_io_command_write(struct avr_t * avr, avr_io_addr_t addr, uint8_t v, void * param)
108 printf("%s %02x\n", __FUNCTION__, v);
110 case SIMAVR_CMD_VCD_START_TRACE:
112 avr_vcd_start(avr->vcd);
114 case SIMAVR_CMD_VCD_STOP_TRACE:
116 avr_vcd_stop(avr->vcd);
118 case SIMAVR_CMD_UART_LOOPBACK: {
119 avr_irq_t * src = avr_io_getirq(avr, AVR_IOCTL_UART_GETIRQ('0'), UART_IRQ_OUTPUT);
120 avr_irq_t * dst = avr_io_getirq(avr, AVR_IOCTL_UART_GETIRQ('0'), UART_IRQ_INPUT);
122 printf("%s activating uart local echo IRQ src %p dst %p\n", __FUNCTION__, src, dst);
123 avr_connect_irq(src, dst);
130 void avr_set_command_register(avr_t * avr, avr_io_addr_t addr)
133 avr_register_io_write(avr, addr, _avr_io_command_write, NULL);
136 static void _avr_io_console_write(struct avr_t * avr, avr_io_addr_t addr, uint8_t v, void * param)
138 static char * buf = NULL;
139 static int size = 0, len = 0;
141 if (v == '\r' && buf) {
143 printf("O:" "%s" "" "\n", buf);
148 if (len + 1 >= size) {
150 buf = (char*)realloc(buf, size);
156 void avr_set_console_register(avr_t * avr, avr_io_addr_t addr)
159 avr_register_io_write(avr, addr, _avr_io_console_write, NULL);
162 void avr_loadcode(avr_t * avr, uint8_t * code, uint32_t size, uint32_t address)
164 if (size > avr->flashend+1) {
165 fprintf(stderr, "avr_loadcode(): Attempted to load code of size %d but flash size is only %d.\n",
166 size, avr->flashend+1);
169 memcpy(avr->flash + address, code, size);
172 void avr_callback_sleep_gdb(avr_t * avr, avr_cycle_count_t howLong)
174 uint32_t usec = avr_cycles_to_usec(avr, howLong);
175 while (avr_gdb_processor(avr, usec))
179 void avr_callback_run_gdb(avr_t * avr)
181 avr_gdb_processor(avr, avr->state == cpu_Stopped);
183 if (avr->state == cpu_Stopped)
186 // if we are stepping one instruction, we "run" for one..
187 int step = avr->state == cpu_Step;
189 avr->state = cpu_Running;
191 uint16_t new_pc = avr->pc;
193 if (avr->state == cpu_Running) {
194 new_pc = avr_run_one(avr);
195 #if CONFIG_SIMAVR_TRACE
200 // if we just re-enabled the interrupts...
201 // double buffer the I flag, to detect that edge
202 if (avr->sreg[S_I] && !avr->i_shadow)
204 avr->i_shadow = avr->sreg[S_I];
206 // run the cycle timers, get the suggested sleep time
207 // until the next timer is due
208 avr_cycle_count_t sleep = avr_cycle_timer_process(avr);
212 if (avr->state == cpu_Sleeping) {
213 if (!avr->sreg[S_I]) {
215 printf("simavr: sleeping with interrupts off, quitting gracefully\n");
217 avr->state = cpu_Done;
221 * try to sleep for as long as we can (?)
223 avr->sleep(avr, sleep);
224 avr->cycle += 1 + sleep;
226 // Interrupt servicing might change the PC too, during 'sleep'
227 if (avr->state == cpu_Running || avr->state == cpu_Sleeping)
228 avr_service_interrupts(avr);
230 // if we were stepping, use this state to inform remote gdb
232 avr->state = cpu_StepDone;
236 void avr_callback_sleep_raw(avr_t * avr, avr_cycle_count_t howLong)
238 uint32_t usec = avr_cycles_to_usec(avr, howLong);
242 void avr_callback_run_raw(avr_t * avr)
245 uint16_t new_pc = avr->pc;
247 if (avr->state == cpu_Running) {
248 new_pc = avr_run_one(avr);
249 #if CONFIG_SIMAVR_TRACE
254 // if we just re-enabled the interrupts...
255 // double buffer the I flag, to detect that edge
256 if (avr->sreg[S_I] && !avr->i_shadow)
258 avr->i_shadow = avr->sreg[S_I];
260 // run the cycle timers, get the suggested sleeo time
261 // until the next timer is due
262 avr_cycle_count_t sleep = avr_cycle_timer_process(avr);
266 if (avr->state == cpu_Sleeping) {
267 if (!avr->sreg[S_I]) {
269 printf("simavr: sleeping with interrupts off, quitting gracefully\n");
271 avr->state = cpu_Done;
275 * try to sleep for as long as we can (?)
277 avr->sleep(avr, sleep);
278 avr->cycle += 1 + sleep;
280 // Interrupt servicing might change the PC too, during 'sleep'
281 if (avr->state == cpu_Running || avr->state == cpu_Sleeping)
282 avr_service_interrupts(avr);
286 int avr_run(avr_t * avr)
293 extern avr_kind_t tiny13;
294 extern avr_kind_t tiny2313;
295 extern avr_kind_t tiny25,tiny45,tiny85;
296 extern avr_kind_t tiny24,tiny44,tiny84;
297 extern avr_kind_t mega8;
298 extern avr_kind_t mega48,mega88,mega168,mega328;
299 extern avr_kind_t mega164,mega324,mega644;
300 extern avr_kind_t mega128;
301 extern avr_kind_t mega1281;
303 avr_kind_t * avr_kind[] = {
306 &tiny25, &tiny45, &tiny85,
307 &tiny24, &tiny44, &tiny84,
309 &mega48, &mega88, &mega168, &mega328,
310 &mega164, &mega324, &mega644,
316 avr_t * avr_make_mcu_by_name(const char *name)
318 avr_kind_t * maker = NULL;
319 for (int i = 0; avr_kind[i] && !maker; i++) {
320 for (int j = 0; avr_kind[i]->names[j]; j++)
321 if (!strcmp(avr_kind[i]->names[j], name)) {
327 fprintf(stderr, "%s: AVR '%s' now known\n", __FUNCTION__, name);
331 avr_t * avr = maker->make();
332 printf("Starting %s - flashend %04x ramend %04x e2end %04x\n", avr->mmcu, avr->flashend, avr->ramend, avr->e2end);