116 lines
2.4 KiB
C
116 lines
2.4 KiB
C
/* MSPDebug - debugging tool for the eZ430
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* Copyright (C) 2009, 2010 Daniel Beer
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include "device.h"
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#define MEM_SIZE 65536
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static u_int8_t *memory;
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static void sim_close(void)
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{
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if (memory) {
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free(memory);
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memory = NULL;
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}
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}
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static int sim_control(device_ctl_t action)
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{
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switch (action) {
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case DEVICE_CTL_ERASE:
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memset(memory, 0xff, MEM_SIZE);
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return 0;
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case DEVICE_CTL_HALT:
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return 0;
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default:
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fprintf(stderr, "sim: CPU control is not implemented\n");
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break;
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}
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return -1;
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}
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static int sim_wait(void)
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{
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return 0;
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}
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static int sim_breakpoint(u_int16_t addr)
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{
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return 0;
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}
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static int sim_getregs(u_int16_t *regs)
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{
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fprintf(stderr, "sim: register fetch is not implemented\n");
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return -1;
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}
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static int sim_setregs(const u_int16_t *regs)
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{
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fprintf(stderr, "sim: register store is not implemented\n");
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return -1;
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}
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static int sim_readmem(u_int16_t addr, u_int8_t *mem, int len)
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{
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if (addr + len > MEM_SIZE)
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len = MEM_SIZE - addr;
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memcpy(mem, memory + addr, len);
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return 0;
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}
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static int sim_writemem(u_int16_t addr, const u_int8_t *mem, int len)
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{
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if (addr + len > MEM_SIZE)
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len = MEM_SIZE - addr;
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memcpy(memory + addr, mem, len);
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return 0;
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}
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static const struct device sim_device = {
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.close = sim_close,
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.control = sim_control,
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.wait = sim_wait,
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.breakpoint = sim_breakpoint,
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.getregs = sim_getregs,
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.setregs = sim_setregs,
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.readmem = sim_readmem,
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.writemem = sim_writemem
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};
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const struct device *sim_open(void)
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{
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memory = malloc(MEM_SIZE);
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if (!memory) {
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perror("sim: can't allocate memory");
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return NULL;
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}
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printf("Simulation started, 0x%x bytes of RAM\n", MEM_SIZE);
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return &sim_device;
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}
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