129 lines
3.2 KiB
C
129 lines
3.2 KiB
C
/*
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* Copyright © 2008 Keith Packard <keithp@keithp.com>
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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, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*/
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#include "ccdbg.h"
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static uint8_t save_acc[] = {
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1, NOP,
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0
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};
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static uint8_t save_sfr[] = {
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2, MOV_A_direct, 0,
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#define SAVE_SFR_ADDR 2
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0,
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};
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struct sfr_state {
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uint8_t address;
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uint16_t mask;
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char *name;
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};
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static struct sfr_state sfrs[CC_STATE_NSFR] = {
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{ SFR_DPL0, CC_STATE_DP, "dpl0" },
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{ SFR_DPH0, CC_STATE_DP, "dph0" },
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{ SFR_DPL1, CC_STATE_DP, "dpl1" },
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{ SFR_DPH1, CC_STATE_DP, "dph1" },
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{ PSW(0), CC_STATE_PSW, "psw" },
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};
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uint8_t
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ccdbg_state_save(struct ccdbg *dbg, struct ccstate *state, unsigned int mask)
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{
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int i;
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mask |= CC_STATE_ACC;
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if (mask & CC_STATE_ACC)
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state->acc = ccdbg_execute(dbg, save_acc);
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for (i = 0; i < CC_STATE_NSFR; i++) {
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if (sfrs[i].mask & mask) {
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save_sfr[SAVE_SFR_ADDR] = sfrs[i].address;
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state->sfr[i] = ccdbg_execute(dbg, save_sfr);
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}
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}
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state->mask = mask;
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return 0;
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}
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static uint8_t restore_sfr[] = {
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3, MOV_direct_data, 0, 0,
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#define RESTORE_SFR_ADDR 2
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#define RESTORE_SFR_DATA 3
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0
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};
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static uint8_t restore_acc[] = {
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2, MOV_A_data, 0,
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#define RESTORE_ACC_DATA 2
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0
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};
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uint8_t
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ccdbg_state_restore(struct ccdbg *dbg, struct ccstate *state)
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{
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int i;
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for (i = CC_STATE_NSFR - 1; i >= 0; i--) {
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if (sfrs[i].mask & state->mask) {
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restore_sfr[RESTORE_SFR_ADDR] = sfrs[i].address;
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restore_sfr[RESTORE_SFR_DATA] = state->sfr[i];
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ccdbg_execute(dbg, restore_sfr);
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}
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}
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if (state->mask & CC_STATE_ACC) {
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restore_acc[RESTORE_ACC_DATA] = state->acc;
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ccdbg_execute(dbg, restore_acc);
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}
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state->mask = 0;
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return 0;
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}
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static void
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ccdbg_state_replace(uint16_t sfr_addr, uint8_t sfr, char *name,
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uint16_t addr, uint8_t *bytes, int nbytes)
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{
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sfr_addr += 0xdf00;
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if (addr <= sfr_addr && sfr_addr < addr + nbytes) {
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fprintf(stderr, "replacing %s at 0x%04x - read 0x%02x saved 0x%02x\n",
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name, sfr_addr, bytes[sfr_addr - addr], sfr);
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bytes[sfr_addr - addr] = sfr;
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}
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}
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void
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ccdbg_state_replace_xmem(struct ccdbg *dbg, struct ccstate *state,
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uint16_t addr, uint8_t *bytes, int nbytes)
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{
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int i;
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if (state->mask & CC_STATE_ACC)
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ccdbg_state_replace(ACC(0), state->acc, "acc",
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addr, bytes, nbytes);
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for (i = 0; i < CC_STATE_NSFR; i++)
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if (state->mask & sfrs[i].mask)
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ccdbg_state_replace(sfrs[i].address, state->sfr[i],
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sfrs[i].name, addr, bytes, nbytes);
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}
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void
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ccdbg_state_replace_sfr(struct ccdbg *dbg, struct ccstate *state,
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uint8_t addr, uint8_t *bytes, int nbytes)
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{
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ccdbg_state_replace_xmem(dbg, state, (uint16_t) addr + 0xdf00, bytes, nbytes);
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}
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