diff options
Diffstat (limited to 'lib/ccdbg-memory.c')
| -rw-r--r-- | lib/ccdbg-memory.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/lib/ccdbg-memory.c b/lib/ccdbg-memory.c new file mode 100644 index 00000000..554ac637 --- /dev/null +++ b/lib/ccdbg-memory.c @@ -0,0 +1,179 @@ +/* + * 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 hex_image *image, uint16_t offset) +{ + ccdbg_write_memory(dbg, image->address + offset, image->data, image->length); + return 0; +} + +struct hex_image * +ccdbg_read_hex_image(struct ccdbg *dbg, uint16_t address, uint16_t length) +{ + struct hex_image *image; + + image = calloc(sizeof(struct 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; +} |