+/*
+ * 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 "ccdbg.h"
+
+static uint8_t save_acc[] = {
+ 1, NOP,
+ 0
+};
+
+static uint8_t save_sfr[] = {
+ 2, MOV_A_direct, 0,
+#define SAVE_SFR_ADDR 2
+ 0,
+};
+
+struct sfr_state {
+ uint8_t address;
+ uint16_t mask;
+ char *name;
+};
+
+static struct sfr_state sfrs[CC_STATE_NSFR] = {
+ { SFR_DPL0, CC_STATE_DP, "dpl0" },
+ { SFR_DPH0, CC_STATE_DP, "dph0" },
+ { SFR_DPL1, CC_STATE_DP, "dpl1" },
+ { SFR_DPH1, CC_STATE_DP, "dph1" },
+ { PSW(0), CC_STATE_PSW, "psw" },
+};
+
+uint8_t
+ccdbg_state_save(struct ccdbg *dbg, struct ccstate *state, unsigned int mask)
+{
+ int i;
+
+ mask |= CC_STATE_ACC;
+ if (mask & CC_STATE_ACC)
+ state->acc = ccdbg_execute(dbg, save_acc);
+ for (i = 0; i < CC_STATE_NSFR; i++) {
+ if (sfrs[i].mask & mask) {
+ save_sfr[SAVE_SFR_ADDR] = sfrs[i].address;
+ state->sfr[i] = ccdbg_execute(dbg, save_sfr);
+ }
+ }
+ state->mask = mask;
+ return 0;
+}
+
+static uint8_t restore_sfr[] = {
+ 3, MOV_direct_data, 0, 0,
+#define RESTORE_SFR_ADDR 2
+#define RESTORE_SFR_DATA 3
+ 0
+};
+
+static uint8_t restore_acc[] = {
+ 2, MOV_A_data, 0,
+#define RESTORE_ACC_DATA 2
+ 0
+};
+
+uint8_t
+ccdbg_state_restore(struct ccdbg *dbg, struct ccstate *state)
+{
+ int i;
+ for (i = CC_STATE_NSFR - 1; i >= 0; i--) {
+ if (sfrs[i].mask & state->mask) {
+ restore_sfr[RESTORE_SFR_ADDR] = sfrs[i].address;
+ restore_sfr[RESTORE_SFR_DATA] = state->sfr[i];
+ ccdbg_execute(dbg, restore_sfr);
+ }
+ }
+ if (state->mask & CC_STATE_ACC) {
+ restore_acc[RESTORE_ACC_DATA] = state->acc;
+ ccdbg_execute(dbg, restore_acc);
+ }
+ state->mask = 0;
+ return 0;
+}
+
+static void
+ccdbg_state_replace(uint16_t sfr_addr, uint8_t sfr, char *name,
+ uint16_t addr, uint8_t *bytes, int nbytes)
+{
+ sfr_addr += 0xdf00;
+
+ if (addr <= sfr_addr && sfr_addr < addr + nbytes) {
+ fprintf(stderr, "replacing %s at 0x%04x - read 0x%02x saved 0x%02x\n",
+ name, sfr_addr, bytes[sfr_addr - addr], sfr);
+ bytes[sfr_addr - addr] = sfr;
+ }
+}
+
+void
+ccdbg_state_replace_xmem(struct ccdbg *dbg, struct ccstate *state,
+ uint16_t addr, uint8_t *bytes, int nbytes)
+{
+ int i;
+ if (state->mask & CC_STATE_ACC)
+ ccdbg_state_replace(ACC(0), state->acc, "acc",
+ addr, bytes, nbytes);
+ for (i = 0; i < CC_STATE_NSFR; i++)
+ if (state->mask & sfrs[i].mask)
+ ccdbg_state_replace(sfrs[i].address, state->sfr[i],
+ sfrs[i].name, addr, bytes, nbytes);
+}
+
+void
+ccdbg_state_replace_sfr(struct ccdbg *dbg, struct ccstate *state,
+ uint8_t addr, uint8_t *bytes, int nbytes)
+{
+ ccdbg_state_replace_xmem(dbg, state, (uint16_t) addr + 0xdf00, bytes, nbytes);
+}
projects / fw / altos / commitdiff