Added config option CONFIG_SILENT_CONSOLE. See doc/README.silent

for more information

CHANGELOG

@@ -2,6 +2,9 @@
 Changes for U-Boot 1.0.0:
 ======================================================================
 
+* Added config option CONFIG_SILENT_CONSOLE.  See doc/README.silent
+  for more information
+
 * Patch by Steven Scholz, 10 Oct 2003
   - Add support for Altera FPGA ACEX1K
 

common/cmd_bootm.c

@@ -117,6 +117,9 @@ static boot_os_Fcn do_bootm_linux;
 #else
 extern boot_os_Fcn do_bootm_linux;
 #endif
+#ifdef CONFIG_SILENT_CONSOLE
+static void fixup_silent_linux (void);
+#endif
 static boot_os_Fcn do_bootm_netbsd;
 static boot_os_Fcn do_bootm_rtems;
 #if (CONFIG_COMMANDS & CFG_CMD_ELF)
@@ -378,6 +381,9 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	switch (hdr->ih_os) {
 	default:			/* handled by (original) Linux case */
 	case IH_OS_LINUX:
+#ifdef CONFIG_SILENT_CONSOLE
+	    fixup_silent_linux();
+#endif
 	    do_bootm_linux  (cmdtp, flag, argc, argv,
 			     addr, len_ptr, verify);
 	    break;
@@ -432,6 +438,40 @@ U_BOOT_CMD(
  	"        'arg' can be the address of an initrd image\n"
 );
 
+#ifdef CONFIG_SILENT_CONSOLE
+static void
+fixup_silent_linux ()
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	char buf[256], *start, *end;
+	char *cmdline = getenv ("bootargs");
+
+	/* Only fix cmdline when requested */
+	if (!(gd->flags & GD_FLG_SILENT))
+		return;
+
+	debug ("before silent fix-up: %s\n", cmdline);
+	if (cmdline) {
+		if ((start = strstr (cmdline, "console=")) != NULL) {
+			end = strchr (start, ' ');
+			strncpy (buf, cmdline, (start - cmdline + 8));
+			if (end)
+				strcpy (buf + (start - cmdline + 8), end);
+			else
+				buf[start - cmdline + 8] = '\0';
+		} else {
+			strcpy (buf, cmdline);
+			strcat (buf, " console=");
+		}
+	} else {
+		strcpy (buf, "console=");
+	}
+
+	setenv ("bootargs", buf);
+	debug ("after silent fix-up: %s\n", buf);
+}
+#endif /* CONFIG_SILENT_CONSOLE */
+
 #ifdef CONFIG_PPC
 static void
 do_bootm_linux (cmd_tbl_t *cmdtp, int flag,

common/console.c

@@ -365,10 +365,16 @@ int console_init_f (void)
 	DECLARE_GLOBAL_DATA_PTR;
 
 	gd->have_console = 1;
+
+#ifdef CONFIG_SILENT_CONSOLE
+	if (getenv("silent") != NULL)
+		gd->flags |= GD_FLG_SILENT;
+#endif
+
 	return (0);
 }
 
-#if defined(CFG_CONSOLE_IS_IN_ENV) || defined(CONFIG_SPLASH_SCREEN)
+#if defined(CFG_CONSOLE_IS_IN_ENV) || defined(CONFIG_SPLASH_SCREEN) || defined(CONFIG_SILENT_CONSOLE)
 /* search a device */
 device_t *search_device (int flags, char *name)
 {
@@ -494,6 +500,12 @@ int console_init_r (void)
 		outputdev = search_device (DEV_FLAGS_OUTPUT, "nulldev");
 #endif
 
+#ifdef CONFIG_SILENT_CONSOLE
+	/* Suppress all output if "silent" mode requested		*/
+	if (gd->flags & GD_FLG_SILENT)
+		outputdev = search_device (DEV_FLAGS_OUTPUT, "nulldev");
+#endif
+
 	/* Scan devices looking for input and output devices */
 	for (i = 1;
 	     (i <= items) && ((inputdev == NULL) || (outputdev == NULL));

common/main.c

@@ -193,6 +193,18 @@ static __inline__ int abortboot(int bootdelay)
 {
 	int abort = 0;
 
+#ifdef CONFIG_SILENT_CONSOLE
+	{
+		DECLARE_GLOBAL_DATA_PTR;
+
+		if (gd->flags & GD_FLG_SILENT) {
+			/* Restore serial console */
+			console_assign (stdout, "serial");
+			console_assign (stderr, "serial");
+		}
+	}
+#endif
+
 #ifdef CONFIG_MENUPROMPT
 	printf(CONFIG_MENUPROMPT, bootdelay);
 #else
@@ -207,13 +219,13 @@ static __inline__ int abortboot(int bootdelay)
 	if (bootdelay >= 0) {
 		if (tstc()) {	/* we got a key press	*/
 			(void) getc();  /* consume input	*/
-			printf ("\b\b\b 0\n");
-			return 1; 	/* don't auto boot	*/
+			printf ("\b\b\b 0");
+			abort = 1; 	/* don't auto boot	*/
 		}
 	}
 #endif
 
-	while (bootdelay > 0) {
+	while ((bootdelay > 0) && (!abort)) {
 		int i;
 
 		--bootdelay;
@@ -237,6 +249,21 @@ static __inline__ int abortboot(int bootdelay)
 
 	putc ('\n');
 
+#ifdef CONFIG_SILENT_CONSOLE
+	{
+		DECLARE_GLOBAL_DATA_PTR;
+
+		if (abort) {
+			/* permanently enable normal console output */
+			gd->flags &= ~(GD_FLG_SILENT);
+		} else if (gd->flags & GD_FLG_SILENT) {
+			/* Restore silent console */
+			console_assign (stdout, "nulldev");
+			console_assign (stderr, "nulldev");
+		}
+	}
+#endif
+
 	return abort;
 }
 # endif	/* CONFIG_AUTOBOOT_KEYED */

doc/README.silent

@@ -0,0 +1,22 @@
+The config option CONFIG_SILENT_CONSOLE can be used to quiet messages
+on the console.  If the option has been enabled, the output can be
+silenced by setting the environment variable "silent".  The variable
+is latched into the global data at an early stage in the boot process
+so deleting it with "setenv" will not take effect until the system is
+restarted.
+
+The following actions are taken if "silent" is set at boot time:
+
+ - Until the console devices have been initialized, output has to be
+   suppressed by testing for the flag "GD_FLG_SILENT" in "gd->flags".
+   Currently only the messages for the TRAB board are handled in this
+   way.
+
+ - When the console devices have been initialized, "stdout" and
+   "stderr" are set to "nulldev", so subsequent messages are
+   suppressed automatically. Make sure to enable "nulldev" by
+   #defining CFG_DEVICE_NULLDEV in your board config file.
+
+ - When booting a linux kernel, the "bootargs" are fixed up so that
+   the argument "console=" will be in the command line, no matter how
+   it was set in "bootargs" before.

include/asm-arm/global_data.h

@@ -59,6 +59,7 @@ typedef	struct	global_data {
  */
 #define	GD_FLG_RELOC	0x00001		/* Code was relocated to RAM		*/
 #define	GD_FLG_DEVINIT	0x00002		/* Devices have been initialized	*/
+#define	GD_FLG_SILENT	0x00004		/* Silent mode				*/
 
 #define DECLARE_GLOBAL_DATA_PTR     register volatile gd_t *gd asm ("r8")
 

include/asm-i386/global_data.h

@@ -53,6 +53,7 @@ typedef	struct {
  */
 #define	GD_FLG_RELOC	0x00001		/* Code was relocated to RAM		*/
 #define	GD_FLG_DEVINIT	0x00002		/* Devices have been initialized	*/
+#define	GD_FLG_SILENT	0x00004		/* Silent mode				*/
 
 extern gd_t *global_data;
 

include/asm-mips/global_data.h

@@ -53,6 +53,7 @@ typedef	struct	global_data {
  */
 #define	GD_FLG_RELOC	0x00001		/* Code was relocated to RAM     */
 #define	GD_FLG_DEVINIT	0x00002		/* Devices have been initialized */
+#define	GD_FLG_SILENT	0x00004		/* Silent mode			 */
 
 #define DECLARE_GLOBAL_DATA_PTR     register volatile gd_t *gd asm ("k0")
 

include/asm-nios/global_data.h

@@ -40,6 +40,7 @@ typedef	struct	global_data {
 /* flags */
 #define	GD_FLG_RELOC	0x00001		/* Code was relocated to RAM		*/
 #define	GD_FLG_DEVINIT	0x00002		/* Devices have been initialized	*/
+#define	GD_FLG_SILENT	0x00004		/* Silent mode				*/
 
 #define DECLARE_GLOBAL_DATA_PTR     register gd_t *gd asm ("%g7")
 

include/asm-ppc/global_data.h

@@ -96,6 +96,7 @@ typedef	struct	global_data {
  */
 #define	GD_FLG_RELOC	0x00001		/* Code was relocated to RAM		*/
 #define	GD_FLG_DEVINIT	0x00002		/* Devices have been initialized	*/
+#define	GD_FLG_SILENT	0x00004		/* Silent mode				*/
 
 #if 1
 #define DECLARE_GLOBAL_DATA_PTR     register volatile gd_t *gd asm ("r29")

include/configs/trab.h

@@ -59,6 +59,8 @@
 #define CONFIG_SETUP_MEMORY_TAGS 1
 #define CONFIG_INITRD_TAG	 1
 
+#define CFG_DEVICE_NULLDEV	 1	/* enble null device		*/
+#define CONFIG_SILENT_CONSOLE	 1	/* enable silent startup	*/
 
 /***********************************************************
  * I2C stuff:

lib_arm/board.c

@@ -111,6 +111,12 @@ static int init_baudrate (void)
 
 static int display_banner (void)
 {
+	DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_SILENT_CONSOLE
+	if (gd->flags & GD_FLG_SILENT)
+		return (0);
+#endif
 
 	printf ("\n\n%s\n\n", version_string);
 	printf ("U-Boot code: %08lX -> %08lX  BSS: -> %08lX\n",
@@ -122,6 +128,7 @@ static int display_banner (void)
 	printf ("IRQ Stack: %08lx\n", IRQ_STACK_START);
 	printf ("FIQ Stack: %08lx\n", FIQ_STACK_START);
 #endif
+
 	return (0);
 }
 
@@ -137,6 +144,11 @@ static int display_dram_config (void)
 	DECLARE_GLOBAL_DATA_PTR;
 	int i;
 
+#ifdef CONFIG_SILENT_CONSOLE
+	if (gd->flags & GD_FLG_SILENT)
+		return (0);
+#endif
+
 	puts ("DRAM Configuration:\n");
 
 	for(i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
@@ -149,6 +161,12 @@ static int display_dram_config (void)
 
 static void display_flash_config (ulong size)
 {
+	DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_SILENT_CONSOLE
+	if (gd->flags & GD_FLG_SILENT)
+		return;
+#endif
 	puts ("Flash: ");
 	print_size (size, "\n");
 }