[cmdline] Add "passes=N" command-line parameter to limit number of pa…

…sses

Signed-off-by: Michael Brown <mcb30@ipxe.org>

main.c

@@ -174,6 +174,11 @@ static void parse_command_line(void)
 			serial_console_setup(cmdline);
 		}
 
+		if (!strncmp(cmdline, "passes=", 7)) {
+			cmdline += 7;
+			v->max_passes = simple_strtoul(cmdline,&cmdline,10);
+		}
+
 		/* go to the next parameter */
 		while (*cmdline && *cmdline != ' ')
 			cmdline++;
@@ -523,6 +528,8 @@ void do_test(void)
 					beep(2000);
 				}
 			}
+			if (v->max_passes && v->pass >= v->max_passes)
+				v->exit = 1;
 		}
 
 		/* We always start a pass with the low copy */

test.h

@@ -104,6 +104,7 @@ typedef unsigned long ulong;
 int memcmp(const void *s1, const void *s2, ulong count);
 int strncmp(const char *s1, const char *s2, ulong n);
 void *memmove(void *dest, const void *src, ulong n);
+unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base);
 int query_linuxbios(void);
 int query_pcbios(void);
 int insertaddress(ulong);
@@ -349,6 +350,7 @@ struct vars {
 	ulong selected_pages;
 	ulong reserved_pages;
 	int exit;
+	int max_passes;
 };
 
 #define FIRMWARE_UNKNOWN   0