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);
41 // cpu is in limbo before init is finished.
42 avr->state = cpu_Limbo;
43 avr->frequency = 1000000; // can be overriden via avr_mcu_section
46 avr->state = cpu_Running;
51 void avr_terminate(avr_t * avr)
54 avr_vcd_close(avr->vcd);
56 avr_deallocate_ios(avr);
60 avr->flash = avr->data = NULL;
63 void avr_reset(avr_t * avr)
65 memset(avr->data, 0x0, avr->ramend + 1);
66 _avr_sp_set(avr, avr->ramend);
68 for (int i = 0; i < 8; i++)
73 avr_io_t * port = avr->io_port;
81 void avr_sadly_crashed(avr_t *avr, uint8_t signal)
83 printf("%s\n", __FUNCTION__);
84 avr->state = cpu_Stopped;
86 // enable gdb server, and wait
94 static void _avr_io_command_write(struct avr_t * avr, avr_io_addr_t addr, uint8_t v, void * param)
96 printf("%s %02x\n", __FUNCTION__, v);
98 case SIMAVR_CMD_VCD_START_TRACE:
100 avr_vcd_start(avr->vcd);
102 case SIMAVR_CMD_VCD_STOP_TRACE:
104 avr_vcd_stop(avr->vcd);
106 case SIMAVR_CMD_UART_LOOPBACK: {
107 avr_irq_t * src = avr_io_getirq(avr, AVR_IOCTL_UART_GETIRQ('0'), UART_IRQ_OUTPUT);
108 avr_irq_t * dst = avr_io_getirq(avr, AVR_IOCTL_UART_GETIRQ('0'), UART_IRQ_INPUT);
110 printf("%s activating uart local echo IRQ src %p dst %p\n", __FUNCTION__, src, dst);
111 avr_connect_irq(src, dst);
118 void avr_set_command_register(avr_t * avr, avr_io_addr_t addr)
121 avr_register_io_write(avr, addr, _avr_io_command_write, NULL);
124 void avr_loadcode(avr_t * avr, uint8_t * code, uint32_t size, uint32_t address)
126 memcpy(avr->flash + address, code, size);
130 int avr_run(avr_t * avr)
132 avr_gdb_processor(avr, avr->state == cpu_Stopped);
134 if (avr->state == cpu_Stopped)
137 // if we are stepping one instruction, we "run" for one..
138 int step = avr->state == cpu_Step;
140 avr->state = cpu_Running;
142 uint16_t new_pc = avr->pc;
144 if (avr->state == cpu_Running) {
145 new_pc = avr_run_one(avr);
146 #if CONFIG_SIMAVR_TRACE
151 // if we just re-enabled the interrupts...
152 // double buffer the I flag, to detect that edge
153 if (avr->sreg[S_I] && !avr->i_shadow)
155 avr->i_shadow = avr->sreg[S_I];
157 // run IO modules that wants it
158 avr_io_t * port = avr->io_port;
165 // run the cycle timers, get the suggested sleeo time
166 // until the next timer is due
167 avr_cycle_count_t sleep = avr_cycle_timer_process(avr);
171 if (avr->state == cpu_Sleeping) {
172 if (!avr->sreg[S_I]) {
173 printf("simavr: sleeping with interrupts off, quitting gracefully\n");
178 * try to sleep for as long as we can (?)
180 uint32_t usec = avr_cycles_to_usec(avr, sleep);
181 // printf("sleep usec %d cycles %d\n", usec, sleep);
183 while (avr_gdb_processor(avr, usec))
187 avr->cycle += 1 + sleep;
189 // Interrupt servicing might change the PC too, during 'sleep'
190 if (avr->state == cpu_Running || avr->state == cpu_Sleeping)
191 avr_service_interrupts(avr);
193 // if we were stepping, use this state to inform remote gdb
195 avr->state = cpu_StepDone;
201 extern avr_kind_t tiny13;
202 extern avr_kind_t tiny2313;
203 extern avr_kind_t tiny25,tiny45,tiny85;
204 extern avr_kind_t mega48,mega88,mega168,mega328;
205 extern avr_kind_t mega164,mega324,mega644;
206 extern avr_kind_t mega128;
208 avr_kind_t * avr_kind[] = {
211 &tiny25, &tiny45, &tiny85,
212 &mega48, &mega88, &mega168, &mega328,
213 &mega164, &mega324, &mega644,
218 avr_t * avr_make_mcu_by_name(const char *name)
220 avr_kind_t * maker = NULL;
221 for (int i = 0; avr_kind[i] && !maker; i++) {
222 for (int j = 0; avr_kind[i]->names[j]; j++)
223 if (!strcmp(avr_kind[i]->names[j], name)) {
229 fprintf(stderr, "%s: AVR '%s' now known\n", __FUNCTION__, name);
233 avr_t * avr = maker->make();
234 printf("Starting %s - flashend %04x ramend %04x e2end %04x\n", avr->mmcu, avr->flashend, avr->ramend, avr->e2end);