[linuxsh-cvs] CVS: linux/arch/sh/kernel early_printk.c, 1.4, 1.5 setup.c, 1.53, 1.54

[Paul M. <le...@us...>]

Update of /cvsroot/linuxsh/linux/arch/sh/kernel
In directory sc8-pr-cvs6.sourceforge.net:/tmp/cvs-serv31010/arch/sh/kernel

Modified Files:
	early_printk.c setup.c 
Log Message:
Allow multiple early printk consoles via earlyprintk=. With this change
earlyprintk is no longer enabled by default, it must be specified on the kernel
command line. Optionally with ,keep to prevent unreg by tty_io.



Index: early_printk.c
===================================================================
RCS file: /cvsroot/linuxsh/linux/arch/sh/kernel/early_printk.c,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -d -r1.4 -r1.5
--- early_printk.c	13 Aug 2005 15:49:28 -0000	1.4
+++ early_printk.c	31 Jul 2006 08:30:48 -0000	1.5
@@ -3,7 +3,7 @@
  *
  *  Copyright (C) 1999, 2000  Niibe Yutaka
  *  Copyright (C) 2002  M. R. Brown
- *  Copyright (C) 2004  Paul Mundt
+ *  Copyright (C) 2004 - 2006  Paul Mundt
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
@@ -49,7 +49,7 @@
 	return 0;
 }
 
-static struct console early_console = {
+static struct console bios_console = {
 	.name		= "bios",
 	.write		= sh_console_write,
 	.setup		= sh_console_setup,
@@ -72,7 +72,7 @@
 
 static struct uart_port scif_port = {
 	.mapbase	= SCIF_REG,
-	.membase	= (char *)SCIF_REG,
+	.membase	= (char __iomem *)SCIF_REG,
 };
 
 static void scif_sercon_putc(int c)
@@ -91,7 +91,8 @@
 		scif_sercon_putc('\r');
 }
 
-static void scif_sercon_write(struct console *con, const char *s, unsigned count)
+static void scif_sercon_write(struct console *con, const char *s,
+			      unsigned count)
 {
 	while (count-- > 0)
 		scif_sercon_putc(*s++);
@@ -104,7 +105,7 @@
 	return 0;
 }
 
-static struct console early_console = {
+static struct console scif_console = {
 	.name		= "sercon",
 	.write		= scif_sercon_write,
 	.setup		= scif_sercon_setup,
@@ -112,7 +113,7 @@
 	.index		= -1,
 };
 
-void scif_sercon_init(int baud)
+static void scif_sercon_init(int baud)
 {
 	ctrl_outw(0, SCIF_REG + 8);
 	ctrl_outw(0, SCIF_REG);
@@ -130,16 +131,61 @@
 }
 #endif
 
-void __init enable_early_printk(void)
+/*
+ * Setup a default console, if more than one is compiled in, rely on the
+ * earlyprintk= parsing to give priority.
+ */
+static struct console *early_console =
+#ifdef CONFIG_SH_STANDARD_BIOS
+	&bios_console
+#elif defined(CONFIG_EARLY_SCIF_CONSOLE)
+	&scif_console
+#else
+	NULL
+#endif
+	;
+
+static int __initdata keep_early;
+
+int __init setup_early_printk(char *opt)
 {
-#if defined(CONFIG_EARLY_SCIF_CONSOLE) && defined(CONFIG_CPU_SH4)
-	scif_sercon_init(115200);
+	char *space;
+	char buf[256];
+
+	strlcpy(buf, opt, sizeof(buf));
+	space = strchr(buf, ' ');
+	if (space)
+		*space = 0;
+
+	if (strstr(buf, "keep"))
+		keep_early = 1;
+
+#ifdef CONFIG_SH_STANDARD_BIOS
+	if (!strncmp(buf, "bios", 4))
+		early_console = &bios_console;
 #endif
-	register_console(&early_console);
+#if defined(CONFIG_EARLY_SCIF_CONSOLE)
+	if (!strncmp(buf, "serial", 6)) {
+		early_console = &scif_console;
+
+#ifdef CONFIG_CPU_SH4
+		scif_sercon_init(115200);
+#endif
+	}
+#endif
+
+	if (likely(early_console))
+		register_console(early_console);
+
+	return 0;
 }
+__setup("earlyprintk=", setup_early_printk);
 
-void disable_early_printk(void)
+void __init disable_early_printk(void)
 {
-	unregister_console(&early_console);
+	if (!keep_early) {
+		printk("disabling early console\n");
+		unregister_console(early_console);
+	} else
+		printk("keeping early console\n");
 }
-

Index: setup.c
===================================================================
RCS file: /cvsroot/linuxsh/linux/arch/sh/kernel/setup.c,v
retrieving revision 1.53
retrieving revision 1.54
diff -u -d -r1.53 -r1.54
--- setup.c	7 Jul 2006 10:55:47 -0000	1.53
+++ setup.c	31 Jul 2006 08:30:48 -0000	1.54
@@ -145,6 +145,24 @@
 				memory_end = memory_start + mem_size;
 			}
 		}
+
+#ifdef CONFIG_EARLY_PRINTK
+		if (c == ' ' && !memcmp(from, "earlyprintk=", 12)) {
+			char *ep_end;
+
+			if (to != command_line)
+				to--;
+
+			from += 12;
+			ep_end = strchr(from, ' ');
+
+			setup_early_printk(from);
+			printk("early console enabled\n");
+
+			from = ep_end;
+		}
+#endif
+
 		if (c == ' ' && !memcmp(from, "sh_mv=", 6)) {
 			char* mv_end;
 			char* mv_comma;
@@ -245,11 +263,7 @@
 	unsigned long bootmap_size;
 	unsigned long start_pfn, max_pfn, max_low_pfn;
 
-#ifdef CONFIG_EARLY_PRINTK
-	extern void enable_early_printk(void);
 
-	enable_early_printk();
-#endif
 #ifdef CONFIG_CMDLINE_BOOL
         strcpy(COMMAND_LINE, CONFIG_CMDLINE);
 #endif