Initial Commit - Copy from Altus Metrum AltOS

ao-tools/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 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;
+}