Modified erase command to allow mass and segment erase.

cmddb.c

@@ -124,8 +124,10 @@ const struct cmddb_record commands[] = {
 		.name = "erase",
 		.func = cmd_erase,
 		.help =
-"erase\n"
+"erase [all|segment] [address]\n"
-"    Erase the device under test.\n"
+"    Erase the device under test. With no arguments, erases all of main\n"
+"    memory. Specify arguments to perform a mass erase, or to erase\n"
+"    individual segments.\n"
 	},
 	{
 		.name = "step",

devcmd.c

@@ -138,11 +138,38 @@ int cmd_reset(char **arg)
 
 int cmd_erase(char **arg)
 {
+	const char *type_text = get_arg(arg);
+	const char *seg_text = get_arg(arg);
+	device_erase_type_t type = DEVICE_ERASE_MAIN;
+	address_t segment = 0;
+
+	if (seg_text && expr_eval(stab_default, seg_text, &segment) < 0) {
+		printc_err("erase: invalid expression: %s\n", seg_text);
+		return -1;
+	}
+
+	if (type_text) {
+		if (!strcasecmp(type_text, "all")) {
+			type = DEVICE_ERASE_ALL;
+		} else if (!strcasecmp(type_text, "segment")) {
+			type = DEVICE_ERASE_SEGMENT;
+			if (!seg_text) {
+				printc_err("erase: expected segment "
+					   "address\n");
+				return -1;
+			}
+		} else {
+			printc_err("erase: unknown erase type: %s\n",
+				    type_text);
+			return -1;
+		}
+	}
+
 	if (device_default->ctl(device_default, DEVICE_CTL_HALT) < 0)
 		return -1;
 
 	printc("Erasing...\n");
-	return device_default->erase(device_default, DEVICE_ERASE_MAIN, 0);
+	return device_default->erase(device_default, type, segment);
 }
 
 int cmd_step(char **arg)

mspdebug.man

@@ -168,9 +168,14 @@ length (64 bytes) is disassembled and shown.
 
 If symbols are available, then all addresses used as operands are
 translated into \fIsymbol\fR+\fIoffset\fR form.
-.IP "\fBerase\fR"
+.IP "\fBerase\fR [\fIall\fR|\fIsegment\fR] [\fIaddress\fR]"
-Erase the device under test. All code memory is erased (but not
+Erase the device under test. With no arguments, all code memory is erased
-information or boot memory).
+(but not information or boot memory). With the argument "all", a mass
+erase is performed (the results may depend on the state of the LOCKA
+bit in the flash memory controller).
+
+Specify "segment" and a memory address to erase an individual flash
+segment.
 .IP "\fBgdb\fR [\fIport\fR]"
 Start a GDB remote stub, optionally specifying a TCP port to listen on.
 If no port is given, the default port is 2000.

sim.c

@@ -530,7 +530,7 @@ static int sim_erase(device_t dev_base, device_erase_type_t type,
 		break;
 
 	case DEVICE_ERASE_ALL:
-		memset(dev->memory + 0x1000, 0xff, 256);
+		memset(dev->memory, 0xff, MEM_SIZE);
 		break;
 
 	case DEVICE_ERASE_SEGMENT: