[PATCH] allow early printk to use more than 25 lines

[Jan Beulich]

(Note: Patch also attached because the inline version is certain to get
line wrapped.)

Allow early printk code to take advantage of the full size of the screen,
not just the first 25 lines.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

diff -Npru linux-2.6.12-rc4.base/arch/x86_64/kernel/early_printk.c linux-2.6.12-rc4/arch/x86_64/kernel/early_printk.c
--- linux-2.6.12-rc4.base/arch/x86_64/kernel/early_printk.c	2005-05-11 17:27:54.819859960 +0200
+++ linux-2.6.12-rc4/arch/x86_64/kernel/early_printk.c	2005-05-11 17:50:36.252890680 +0200
@@ -2,20 +2,24 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/string.h>
+#include <linux/tty.h>
 #include <asm/io.h>
 #include <asm/processor.h>
 
 /* Simple VGA output */
 
 #ifdef __i386__
+#include <asm/setup.h>
 #define VGABASE		(__ISA_IO_base + 0xb8000)
 #else
+#include <asm/bootsetup.h>
 #define VGABASE		((void __iomem *)0xffffffff800b8000UL)
 #endif
 
-#define MAX_YPOS	25
-#define MAX_XPOS	80
+#define MAX_YPOS	max_ypos
+#define MAX_XPOS	max_xpos
 
+static int max_ypos = 25, max_xpos = 80;
 static int current_ypos = 1, current_xpos = 0; 
 
 static void early_vga_write(struct console *con, const char *str, unsigned n)
@@ -196,7 +200,10 @@ int __init setup_early_printk(char *opt)
 	} else if (!strncmp(buf, "ttyS", 4)) { 
 		early_serial_init(buf);
 		early_console = &early_serial_console;		
-	} else if (!strncmp(buf, "vga", 3)) {
+	} else if (!strncmp(buf, "vga", 3)
+	           && SCREEN_INFO.orig_video_isVGA == 1) {
+		max_xpos = SCREEN_INFO.orig_video_cols;
+		max_ypos = SCREEN_INFO.orig_video_lines;
 		early_console = &early_vga_console; 
 	}
 	early_console_initialized = 1;


(Note: Patch also attached because the inline version is certain to get
line wrapped.)

Allow early printk code to take advantage of the full size of the screen,
not just the first 25 lines.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

diff -Npru linux-2.6.12-rc4.base/arch/x86_64/kernel/early_printk.c linux-2.6.12-rc4/arch/x86_64/kernel/early_printk.c
--- linux-2.6.12-rc4.base/arch/x86_64/kernel/early_printk.c	2005-05-11 17:27:54.819859960 +0200
+++ linux-2.6.12-rc4/arch/x86_64/kernel/early_printk.c	2005-05-11 17:50:36.252890680 +0200
@@ -2,20 +2,24 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/string.h>
+#include <linux/tty.h>
 #include <asm/io.h>
 #include <asm/processor.h>
 
 /* Simple VGA output */
 
 #ifdef __i386__
+#include <asm/setup.h>
 #define VGABASE		(__ISA_IO_base + 0xb8000)
 #else
+#include <asm/bootsetup.h>
 #define VGABASE		((void __iomem *)0xffffffff800b8000UL)
 #endif
 
-#define MAX_YPOS	25
-#define MAX_XPOS	80
+#define MAX_YPOS	max_ypos
+#define MAX_XPOS	max_xpos
 
+static int max_ypos = 25, max_xpos = 80;
 static int current_ypos = 1, current_xpos = 0; 
 
 static void early_vga_write(struct console *con, const char *str, unsigned n)
@@ -196,7 +200,10 @@ int __init setup_early_printk(char *opt)
 	} else if (!strncmp(buf, "ttyS", 4)) { 
 		early_serial_init(buf);
 		early_console = &early_serial_console;		
-	} else if (!strncmp(buf, "vga", 3)) {
+	} else if (!strncmp(buf, "vga", 3)
+	           && SCREEN_INFO.orig_video_isVGA == 1) {
+		max_xpos = SCREEN_INFO.orig_video_cols;
+		max_ypos = SCREEN_INFO.orig_video_lines;
 		early_console = &early_vga_console; 
 	}
 	early_console_initialized = 1;