From 9558b48af006a34d3ab7f0bd13a76b97acd45e47 Mon Sep 17 00:00:00 2001
From: Graeme Russ
Date: Thu, 1 Sep 2011 00:48:27 +0000
Subject: console: Implement pre-console buffer

Allow redirection of console output prior to console initialisation to a
temporary buffer.

To enable this functionality, the board (or arch) must define:
 - CONFIG_PRE_CONSOLE_BUFFER - Enable pre-console buffer
 - CONFIG_PRE_CON_BUF_ADDR - Base address of pre-console buffer
 - CONFIG_PRE_CON_BUF_SZ - Size of pre-console buffer (in bytes)

The pre-console buffer will buffer the last CONFIG_PRE_CON_BUF_SZ bytes
Any earlier characters are silently dropped.
---
 arch/m68k/include/asm/global_data.h | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'arch/m68k/include')

diff --git a/arch/m68k/include/asm/global_data.h b/arch/m68k/include/asm/global_data.h
index fc486fda58d..0ba2b43305d 100644
--- a/arch/m68k/include/asm/global_data.h
+++ b/arch/m68k/include/asm/global_data.h
@@ -57,6 +57,9 @@ typedef	struct	global_data {
 	unsigned long	env_addr;	/* Address  of Environment struct	*/
 	unsigned long	env_valid;	/* Checksum of Environment valid?	*/
 	unsigned long	have_console;	/* serial_init() was called		*/
+#ifdef CONFIG_PRE_CONSOLE_BUFFER
+	unsigned long	precon_buf_idx;	/* Pre-Console buffer index */
+#endif
 #if defined(CONFIG_LCD) || defined(CONFIG_VIDEO)
 	unsigned long	fb_base;	/* Base addr of framebuffer memory */
 #endif
-- 
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