+/*
+ * Copyright © 2008 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "ao-dbg.h"
+
+static uint16_t start_address;
+
+static enum command_result
+parse_int(char *value, int *result)
+{
+ char *endptr;
+
+ *result = strtol(value, &endptr, 0);
+ if (endptr == value)
+ return command_syntax;
+ return command_success;
+}
+
+static enum command_result
+parse_uint16(char *value, uint16_t *uint16)
+{
+ int v;
+ enum command_result result;
+
+ result = parse_int(value, &v);
+ if (result != command_success)
+ return command_error;
+ if (v < 0 || v > 0xffff)
+ return command_error;
+ *uint16 = v;
+ return command_success;
+}
+
+static enum command_result
+parse_uint8(char *value, uint8_t *uint8)
+{
+ int v;
+ enum command_result result;
+
+ result = parse_int(value, &v);
+ if (result != command_success)
+ return command_error;
+ if (v < 0 || v > 0xff)
+ return command_error;
+ *uint8 = v;
+ return command_success;
+}
+
+enum command_result
+command_quit (int argc, char **argv)
+{
+ ccdbg_reset(s51_dbg);
+ exit(0);
+ return command_error;
+}
+
+static void
+dump_bytes(uint8_t *memory, int length, uint16_t start, char *format)
+{
+ int group, i;
+
+ for (group = 0; group < length; group += 8) {
+ s51_printf(format, start + group);
+ for (i = group; i < length && i < group + 8; i++)
+ s51_printf("%02x ", memory[i]);
+ for (; i < group + 8; i++)
+ s51_printf(" ");
+ for (i = group; i < length && i < group + 8; i++) {
+ if (isascii(memory[i]) && isprint(memory[i]))
+ s51_printf("%c", memory[i]);
+ else
+ s51_printf(".");
+ }
+ s51_printf("\n");
+ }
+}
+
+enum command_result
+command_di (int argc, char **argv)
+{
+ uint16_t start, end;
+ uint8_t memory[65536];
+ uint8_t status;
+ int length;
+
+ if (argc != 3)
+ return command_error;
+ if (parse_uint16(argv[1], &start) != command_success)
+ return command_error;
+ if (parse_uint16(argv[2], &end) != command_success)
+ return command_error;
+ length = (int) end - (int) start + 1;
+ status = ccdbg_read_memory(s51_dbg, start + 0xff00, memory, length);
+ dump_bytes(memory, length, start, "0x%02x ");
+ return command_success;
+}
+
+enum command_result
+command_ds (int argc, char **argv)
+{
+ uint8_t start, end;
+ uint8_t memory[0x100];
+ uint8_t status;
+ int length;
+
+ if (argc != 3)
+ return command_error;
+ if (parse_uint8(argv[1], &start) != command_success)
+ return command_error;
+ if (parse_uint8(argv[2], &end) != command_success)
+ return command_error;
+ length = (int) end - (int) start + 1;
+ status = ccdbg_read_sfr(s51_dbg, start, memory, length);
+ dump_bytes(memory, length, start, "0x%02x ");
+ return command_success;
+}
+
+enum command_result
+command_dx (int argc, char **argv)
+{
+ uint16_t start, end;
+ uint8_t memory[65536];
+ uint8_t status;
+ int length;
+
+ if (argc != 3)
+ return command_error;
+ if (parse_uint16(argv[1], &start) != command_success)
+ return command_error;
+ if (parse_uint16(argv[2], &end) != command_success)
+ return command_error;
+ length = (int) end - (int) start + 1;
+ status = ccdbg_read_memory(s51_dbg, start, memory, length);
+ dump_bytes(memory, length, start, "0x%04x ");
+ return command_success;
+}
+
+enum command_result
+command_set (int argc, char **argv)
+{
+ uint16_t address;
+ uint8_t *data;
+ int len = argc - 3;
+ int i;
+ enum command_result ret = command_success;
+
+ if (len < 0)
+ return command_error;
+ if (parse_uint16(argv[2], &address) != command_success)
+ return command_error;
+ if (len == 0)
+ return command_success;
+ data = malloc(len);
+ if (!data)
+ return command_error;
+ for (i = 0; i < len; i++)
+ if (parse_uint8(argv[i+3], &data[i]) != command_success)
+ return command_error;
+
+ if (strcmp(argv[1], "xram") == 0) {
+ ccdbg_write_memory(s51_dbg, address, data, len);
+ } else if (strcmp(argv[1], "iram") == 0) {
+ ccdbg_write_memory(s51_dbg, address + 0xff00, data, len);
+ } else if (strcmp(argv[1], "sfr") == 0) {
+ ccdbg_write_sfr(s51_dbg, (uint8_t) address, data, len);
+ } else
+ ret = command_error;
+ free(data);
+ return ret;
+}
+
+enum command_result
+command_dump (int argc, char **argv)
+{
+ if (argv[1]) {
+ if (strcmp(argv[1], "rom") == 0 ||
+ strcmp(argv[1], "xram") == 0)
+ return command_dx(argc-1, argv+1);
+ if (strcmp(argv[1], "iram") == 0)
+ return command_di(argc-1, argv+1);
+ if (strcmp(argv[1], "sfr") == 0)
+ return command_ds(argc-1, argv+1);
+ }
+ return command_error;
+}
+
+enum command_result
+command_file (int argc, char **argv)
+{
+ struct hex_file *hex;
+ struct hex_image *image;
+ FILE *file;
+
+ if (argc != 2)
+ return command_error;
+ file = fopen (argv[1], "r");
+ if (!file)
+ return command_error;
+ hex = ccdbg_hex_file_read(file, argv[1]);
+ fclose(file);
+ if (!hex)
+ return command_error;
+ if (hex->nrecord == 0) {
+ ccdbg_hex_file_free(hex);
+ return command_error;
+ }
+ image = ccdbg_hex_image_create(hex);
+ ccdbg_hex_file_free(hex);
+ start_address = image->address;
+ ccdbg_set_rom(s51_dbg, image);
+ return command_success;
+}
+
+enum command_result
+command_pc (int argc, char **argv)
+{
+ uint16_t pc;
+ if (argv[1]) {
+ enum command_result result;
+ result = parse_uint16(argv[1], &pc);
+ if (result != command_success)
+ return result;
+ ccdbg_set_pc(s51_dbg, pc);
+ } else {
+ pc = ccdbg_get_pc(s51_dbg);
+ s51_printf(" 0x%04x 00\n", pc);
+ }
+ return command_success;
+}
+
+struct cc_break {
+ int enabled;
+ int temporary;
+ uint16_t address;
+};
+
+#define CC_NUM_BREAKPOINTS 4
+
+static struct cc_break breakpoints[CC_NUM_BREAKPOINTS];
+
+static void
+disable_breakpoint(int b)
+{
+ uint8_t status;
+
+ status = ccdbg_set_hw_brkpnt(s51_dbg, b, 0, breakpoints[b].address);
+ if (status != 0x00 && status != 0xff)
+ s51_printf("disable_breakpoint status 0x%02x\n", status);
+}
+
+static void
+enable_breakpoint(int b)
+{
+ uint8_t status;
+
+ status = ccdbg_set_hw_brkpnt(s51_dbg, b, 1, breakpoints[b].address);
+ if (status != 0xff)
+ s51_printf("enable_breakpoint status 0x%02x\n", status);
+}
+
+static void
+enable_breakpoints(void)
+{
+ int b;
+ for (b = 0; b < CC_NUM_BREAKPOINTS; b++)
+ if (breakpoints[b].enabled)
+ enable_breakpoint(b);
+}
+
+enum command_result
+set_breakpoint(uint16_t address, int temporary)
+{
+ int b;
+ uint8_t status;
+ for (b = 0; b < CC_NUM_BREAKPOINTS; b++) {
+ if (breakpoints[b].enabled == 0)
+ break;
+ if (breakpoints[b].address == address)
+ break;
+ }
+ if (b == CC_NUM_BREAKPOINTS) {
+ s51_printf("Error: too many breakpoints requested\n");
+ return command_success;
+ }
+ if (breakpoints[b].enabled == 0) {
+ breakpoints[b].address = address;
+ enable_breakpoint(b);
+ }
+ ++breakpoints[b].enabled;
+ s51_printf("Breakpoint %d at 0x%04x\n", b, address);
+ breakpoints[b].temporary += temporary;
+ return command_success;
+}
+
+enum command_result
+clear_breakpoint(uint16_t address, int temporary)
+{
+ int b;
+ uint8_t status;
+
+ for (b = 0; b < CC_NUM_BREAKPOINTS; b++) {
+ if (breakpoints[b].enabled != 0 &&
+ ((breakpoints[b].temporary != 0) == (temporary != 0)) &&
+ breakpoints[b].address == address)
+ break;
+ }
+ if (b == CC_NUM_BREAKPOINTS) {
+ s51_printf("Error: no matching breakpoint found\n");
+ return command_success;
+ }
+ --breakpoints[b].enabled;
+ breakpoints[b].temporary -= temporary;
+ if (breakpoints[b].enabled == 0) {
+ disable_breakpoint(b);
+ breakpoints[b].address = -1;
+ }
+ return command_success;
+}
+
+
+int
+find_breakpoint(uint16_t address)
+{
+ int b;
+
+ for (b = 0; b < CC_NUM_BREAKPOINTS; b++)
+ if (breakpoints[b].enabled && breakpoints[b].address == address)
+ break;
+ if (b == CC_NUM_BREAKPOINTS)
+ return -1;
+ return b;
+}
+
+enum command_result
+command_break (int argc, char **argv)
+{
+ int b;
+ uint16_t address;
+ enum command_result result;
+
+ if (argc == 1) {
+ for (b = 0; b < CC_NUM_BREAKPOINTS; b++)
+ if (breakpoints[b].enabled)
+ s51_printf("Breakpoint %d 0x%04x\n",
+ b, breakpoints[b].address);
+ return command_success;
+ }
+ if (argc != 2)
+ return command_error;
+ result = parse_uint16(argv[1], &address);
+ if (result != command_success)
+ return result;
+
+ return set_breakpoint(address, 0);
+}
+
+enum command_result
+command_clear (int argc, char **argv)
+{
+ int b;
+ uint16_t address;
+ enum command_result result;
+
+ if (argc != 2)
+ return command_error;
+ result = parse_uint16(argv[1], &address);
+ if (result != command_success)
+ return result;
+ return clear_breakpoint(address, 0);
+}
+
+void
+cc_stopped(uint8_t status)
+{
+ uint16_t pc;
+ int b;
+ int code;
+ char *reason;
+
+ pc = ccdbg_get_pc(s51_dbg);
+ if (status & CC_STATUS_CPU_HALTED) {
+ if ((status & CC_STATUS_HALT_STATUS) != 0) {
+ pc = pc - 1;
+ code = 104;
+ reason = "Breakpoint";
+ b = find_breakpoint(pc);
+ if (b != -1 && breakpoints[b].temporary)
+ clear_breakpoint(pc, 1);
+ ccdbg_set_pc(s51_dbg, pc);
+ } else {
+ code = 105;
+ reason = "Interrupt";
+ }
+ s51_printf("Stop at 0x%04x: (%d) %s\n",
+ pc, code, reason);
+ }
+}
+
+uint8_t
+cc_step(uint16_t pc)
+{
+ int b;
+ uint8_t status;
+
+ b = find_breakpoint(pc);
+ if (b != -1)
+ disable_breakpoint(b);
+ status = ccdbg_step_instr(s51_dbg);
+ if (b != -1)
+ enable_breakpoint(b);
+ return status;
+}
+
+enum command_result
+command_run (int argc, char **argv)
+{
+ uint16_t start, end;
+ enum command_result result;
+ uint16_t pc;
+ uint8_t status;
+ int b;
+
+ if (argv[1]) {
+ result = parse_uint16(argv[1], &start);
+ if (result != command_success)
+ return result;
+ if (argv[2]) {
+ result = parse_uint16(argv[2], &end);
+ if (result != command_success)
+ return result;
+ }
+ if (start_address && start == 0) {
+ start = start_address;
+ s51_printf("Starting at 0x%04x\n", start);
+ }
+ ccdbg_set_pc(s51_dbg, start);
+ }
+ else
+ start = ccdbg_get_pc(s51_dbg);
+ s51_printf("Resume at 0x%04x\n", start);
+ pc = start;
+ b = find_breakpoint(pc);
+ if (b != -1) {
+ cc_step(pc);
+ pc = ccdbg_get_pc(s51_dbg);
+ if (find_breakpoint(pc) != -1) {
+ status = ccdbg_read_status(s51_dbg);
+ cc_stopped(status);
+ return command_success;
+ }
+ }
+ ccdbg_resume(s51_dbg);
+ result = cc_wait();
+ return result;
+}
+
+enum command_result
+command_next (int argc, char **argv)
+{
+ return command_step(argc, argv);
+}
+
+enum command_result
+command_step (int argc, char **argv)
+{
+ uint16_t pc;
+ uint8_t opcode;
+ uint8_t a;
+
+ a = cc_step(ccdbg_get_pc(s51_dbg));
+ s51_printf(" ACC= 0x%02x\n", a);
+ pc = ccdbg_get_pc(s51_dbg);
+ ccdbg_read_memory(s51_dbg, pc, &opcode, 1);
+ s51_printf(" ? 0x%04x %02x\n", pc, opcode);
+ return command_success;
+}
+
+enum command_result
+command_load (int argc, char **argv)
+{
+ char *filename = argv[1];
+ FILE *file;
+ struct hex_file *hex;
+ struct hex_image *image;
+
+ if (!filename)
+ return command_error;
+ file = fopen(filename, "r");
+ if (!file) {
+ perror(filename);
+ return command_error;
+ }
+ hex = ccdbg_hex_file_read(file, filename);
+ fclose(file);
+ if (!hex) {
+ return command_error;
+ }
+ image = ccdbg_hex_image_create(hex);
+ ccdbg_hex_file_free(hex);
+ if (!image) {
+ fprintf(stderr, "image create failed\n");
+ return command_error;
+ }
+ if (image->address >= 0xf000) {
+ printf("Loading %d bytes to RAM at 0x%04x\n",
+ image->length, image->address);
+ ccdbg_write_hex_image(s51_dbg, image, 0);
+ } else {
+ fprintf(stderr, "Can only load to RAM\n");
+ }
+ ccdbg_hex_image_free(image);
+ return command_success;
+}
+
+enum command_result
+command_halt (int argc, char **argv)
+{
+ uint16_t pc;
+ ccdbg_halt(s51_dbg);
+ pc = ccdbg_get_pc(s51_dbg);
+ s51_printf("Halted at 0x%04x\n", pc);
+ return command_success;
+}
+
+enum command_result
+command_stop (int argc, char **argv)
+{
+ return command_success;
+}
+
+enum command_result
+command_reset (int argc, char **argv)
+{
+ ccdbg_debug_mode(s51_dbg);
+ ccdbg_halt(s51_dbg);
+ enable_breakpoints();
+ return command_success;
+}
+
+enum command_result
+command_status(int argc, char **argv)
+{
+ uint8_t status;
+
+ status = ccdbg_read_status(s51_dbg);
+ if ((status & CC_STATUS_CHIP_ERASE_DONE) == 0)
+ s51_printf("\tChip erase in progress\n");
+ if (status & CC_STATUS_PCON_IDLE)
+ s51_printf("\tCPU is idle (clock gated)\n");
+ if (status & CC_STATUS_CPU_HALTED)
+ s51_printf("\tCPU halted\n");
+ else
+ s51_printf("\tCPU running\n");
+ if ((status & CC_STATUS_POWER_MODE_0) == 0)
+ s51_printf("\tPower Mode 1-3 selected\n");
+ if (status & CC_STATUS_HALT_STATUS)
+ s51_printf("\tHalted by software or hw breakpoint\n");
+ else
+ s51_printf("\tHalted by debug command\n");
+ if (status & CC_STATUS_DEBUG_LOCKED)
+ s51_printf("\tDebug interface is locked\n");
+ if ((status & CC_STATUS_OSCILLATOR_STABLE) == 0)
+ s51_printf("\tOscillators are not stable\n");
+ if (status & CC_STATUS_STACK_OVERFLOW)
+ s51_printf("\tStack overflow\n");
+ return command_success;
+}
+
+static enum command_result
+info_breakpoints(int argc, char **argv)
+{
+ int b;
+ uint16_t address;
+ enum command_result result;
+
+ if (argc == 1) {
+ s51_printf("Num Type Disp Hit Cnt Address What\n");
+ for (b = 0; b < CC_NUM_BREAKPOINTS; b++)
+ if (breakpoints[b].enabled) {
+ s51_printf("%-3d fetch %s 1 1 0x%04x uc::disass() unimplemented\n",
+ b,
+ breakpoints[b].temporary ? "del " : "keep",
+ breakpoints[b].address);
+ }
+ return command_success;
+ }
+
+}
+
+static enum command_result
+info_help(int argc, char **argv);
+
+static struct command_function infos[] = {
+ { "breakpoints", "b", info_breakpoints, "[b]reakpoints",
+ "List current breakpoints\n" },
+ { "help", "?", info_help, "help",
+ "Print this list\n" },
+
+ { NULL, NULL, NULL, NULL, NULL },
+};
+
+static enum command_result
+info_help(int argc, char **argv)
+{
+ return command_function_help(infos, argc, argv);
+}
+
+enum command_result
+command_info(int argc, char **argv)
+{
+ struct command_function *func;
+
+ if (argc < 2)
+ return command_error;
+ func = command_string_to_function(infos, argv[1]);
+ if (!func)
+ return command_syntax;
+ return (*func->func)(argc-1, argv+1);
+}
+
+enum command_result
+cc_wait(void)
+{
+ for(;;) {
+ uint8_t status;
+ status = ccdbg_read_status(s51_dbg);
+ if (status & CC_STATUS_CPU_HALTED) {
+ cc_stopped(status);
+ return command_success;
+ }
+ if (s51_interrupted || s51_check_input()) {
+
+ ccdbg_halt(s51_dbg);
+ status = ccdbg_read_status(s51_dbg);
+ cc_stopped(status);
+ return command_interrupt;
+ }
+ }
+}
projects / fw / altos / commitdiff