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/*
* 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"
/*
* Read and write arbitrary memory through the debug port
*/
static uint8_t memory_init[] = {
3, MOV_DPTR_data16, 0, 0,
#define HIGH_START 2
#define LOW_START 3
0,
};
static uint8_t write8[] = {
2, MOV_A_data, 0,
#define DATA_BYTE 2
1, MOVX_atDPTR_A,
1, INC_DPTR,
0
};
static uint8_t read8[] = {
1, MOVX_A_atDPTR,
1, INC_DPTR,
0,
};
uint8_t
ccdbg_write_memory(struct ccdbg *dbg, uint16_t addr, uint8_t *bytes, int nbytes)
{
int i, nl = 0;
struct ccstate state;
if (dbg->usb)
return cc_usb_write_memory(dbg->usb, addr, bytes, nbytes);
ccdbg_state_save(dbg, &state, CC_STATE_ACC | CC_STATE_PSW | CC_STATE_DP);
memory_init[HIGH_START] = addr >> 8;
memory_init[LOW_START] = addr;
(void) ccdbg_execute(dbg, memory_init);
for (i = 0; i < nbytes; i++) {
write8[DATA_BYTE] = *bytes++;
ccdbg_execute(dbg, write8);
if ((i & 0xf) == 0xf) {
ccdbg_debug(CC_DEBUG_MEMORY, ".");
ccdbg_flush(CC_DEBUG_MEMORY);
nl = 1;
}
if ((i & 0xff) == 0xff) {
ccdbg_debug(CC_DEBUG_MEMORY, "\n");
nl = 0;
}
}
ccdbg_state_restore(dbg, &state);
if (nl)
ccdbg_debug(CC_DEBUG_MEMORY, "\n");
return 0;
}
uint8_t
ccdbg_read_memory(struct ccdbg *dbg, uint16_t addr, uint8_t *bytes, int nbytes)
{
int i, nl = 0;
struct ccstate state;
if (ccdbg_rom_contains(dbg, addr, nbytes)) {
ccdbg_rom_replace_xmem(dbg, addr, bytes, nbytes);
return 0;
}
if (dbg->usb)
return cc_usb_read_memory(dbg->usb, addr, bytes, nbytes);
ccdbg_state_save(dbg, &state, CC_STATE_ACC | CC_STATE_PSW | CC_STATE_DP);
memory_init[HIGH_START] = addr >> 8;
memory_init[LOW_START] = addr;
(void) ccdbg_execute(dbg, memory_init);
for (i = 0; i < nbytes; i++) {
*bytes++ = ccdbg_execute(dbg, read8);
if ((i & 0xf) == 0xf) {
ccdbg_debug(CC_DEBUG_MEMORY, ".");
ccdbg_flush(CC_DEBUG_MEMORY);
nl = 1;
}
if ((i & 0xff) == 0xff) {
ccdbg_debug(CC_DEBUG_MEMORY, "\n");
nl = 0;
}
}
ccdbg_state_replace_xmem(dbg, &state, addr, bytes, nbytes);
ccdbg_state_restore(dbg, &state);
if (nl)
ccdbg_debug(CC_DEBUG_MEMORY, "\n");
return 0;
}
uint8_t
ccdbg_write_uint8(struct ccdbg *dbg, uint16_t addr, uint8_t byte)
{
return ccdbg_write_memory(dbg, addr, &byte, 1);
}
uint8_t
ccdbg_write_hex_image(struct ccdbg *dbg, struct ao_hex_image *image, uint16_t offset)
{
ccdbg_write_memory(dbg, image->address + offset, image->data, image->length);
return 0;
}
struct ao_hex_image *
ccdbg_read_hex_image(struct ccdbg *dbg, uint16_t address, uint16_t length)
{
struct ao_hex_image *image;
image = calloc(sizeof(struct ao_hex_image) + length, 1);
image->address = address;
image->length = length;
memset(image->data, 0xff, length);
ccdbg_read_memory(dbg, address, image->data, length);
return image;
}
static uint8_t sfr_read[] = {
2, MOV_A_direct, 0,
#define SFR_READ_ADDR 2
0,
};
static uint8_t sfr_write[] = {
3, MOV_direct_data, 0, 0,
#define SFR_WRITE_ADDR 2
#define SFR_WRITE_DATA 3
0,
};
uint8_t
ccdbg_read_sfr(struct ccdbg *dbg, uint8_t addr, uint8_t *bytes, int nbytes)
{
int i;
struct ccstate state;
ccdbg_state_save(dbg, &state, CC_STATE_ACC);
for (i = 0; i < nbytes; i++) {
sfr_read[SFR_READ_ADDR] = addr + i;
*bytes++ = ccdbg_execute(dbg, sfr_read);
}
ccdbg_state_replace_sfr(dbg, &state, addr, bytes, nbytes);
ccdbg_state_restore(dbg, &state);
return 0;
}
uint8_t
ccdbg_write_sfr(struct ccdbg *dbg, uint8_t addr, uint8_t *bytes, int nbytes)
{
int i;
for (i = 0; i < nbytes; i++) {
sfr_write[SFR_WRITE_ADDR] = addr + i;
sfr_write[SFR_WRITE_DATA] = *bytes++;
ccdbg_execute(dbg, sfr_write);
}
return 0;
}
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