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authorGraeme Russ <graeme.russ@gmail.com>2011-09-01 00:48:27 +0000
committerWolfgang Denk <wd@denx.de>2011-10-05 22:03:09 +0200
commit9558b48af006a34d3ab7f0bd13a76b97acd45e47 (patch)
treed2fbeae7e5f2ef15cc7194fd21d504229259f2de /arch/powerpc/include/asm/global_data.h
parentcc9abfe4ceb360e9adedc4ed44eae0fcc3fd184c (diff)
downloadblackbird-obmc-uboot-9558b48af006a34d3ab7f0bd13a76b97acd45e47.tar.gz
blackbird-obmc-uboot-9558b48af006a34d3ab7f0bd13a76b97acd45e47.zip
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.
Diffstat (limited to 'arch/powerpc/include/asm/global_data.h')
-rw-r--r--arch/powerpc/include/asm/global_data.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/global_data.h b/arch/powerpc/include/asm/global_data.h
index a33ca2f7b7..7fcaf384ed 100644
--- a/arch/powerpc/include/asm/global_data.h
+++ b/arch/powerpc/include/asm/global_data.h
@@ -138,6 +138,9 @@ 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_SYS_ALLOC_DPRAM) || defined(CONFIG_CPM2)
unsigned int dp_alloc_base;
unsigned int dp_alloc_top;
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