New patch to review for coreboot: b26c9b0 CBMEM CONSOLE: Add config option for CBMEM stored console log.

[Stefan Reinauer]

Stefan Reinauer ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/718

-gerrit

commit b26c9b0c087f14a84b08b62f6f0c2796ac9253d1
Author: Vadim Bendebury 
Date:   Wed Sep 28 13:51:30 2011 -0700

CBMEM CONSOLE: Add config option for CBMEM stored console log.

Some experiments have demonstrated that total amount of text
    generated by coreboot console when BIOS_SPEW level is enabled
    exceeds 40KB.

Console output generated before DRAM is initialized can exceed
    2KB. This patch introduces the new configuration option and
    assigns adequate default values to cache based and DRAM based
    console buffers.

BUG=chrome-os-partner:4200
    TEST=manual

. run the following commands in the root directory

cp config.stumpy .config
       make menuconfig

. enable the new option (Console->Send console output to a CBMEM buffer)
     . save the configuration

Observe the following settings added to the config:
    +CONFIG_CONSOLE_CBMEM=y
    +CONFIG_CONSOLE_CBMEM_BUFFER_SIZE=0xae00
    +CONFIG_CONSOLE_CAR_BUFFER_SIZE=0xc00

Change-Id: I209603f516244ae136631e6281ba21ebc6fb1710
    Signed-off-by: Vadim Bendebury 
    Reviewed-on: https://gerrit-int.chromium.org/5855
    Tested-by: Vadim Bendebury 
    Reviewed-by: Stefan Reinauer 
---
 src/console/Kconfig |   27 +++++++++++++++++++++++++++
 1 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/src/console/Kconfig b/src/console/Kconfig
index dbd11f6..fefbe2e 100644
--- a/src/console/Kconfig
+++ b/src/console/Kconfig
@@ -190,6 +190,33 @@ config CONSOLE_NE2K_IO_PORT
      32 bytes of IO spaces will be used (and align on 32 bytes
      boundary, qemu needs broader align)

+config CONSOLE_CBMEM
+	depends on EARLY_CBMEM_INIT
+	bool "Send console output to a CBMEM buffer"
+	default n
+	help
+	  Enable this to save the console output in a CBMEM buffer. This would
+	  allow to see coreboot console output from Linux space.
+
+config CONSOLE_CBMEM_BUFFER_SIZE
+	depends on CONSOLE_CBMEM
+	hex "Room allocated for console output in CBMEM"
+	default 0xae00
+	help
+	  Space allocated for console output storage in CBMEM. The default
+	  value (almost 45K or 0xaeoo bytes) is large enough to accommodate
+	  even the BIOS_SPEW level.
+
+config CONSOLE_CAR_BUFFER_SIZE
+	depends on CONSOLE_CBMEM
+	hex "Room allocated for console output in cash as RAM"
+	default 0xc00
+	help
+	  Console is used before RAM is initialized. This is the room reserved
+	  in the DCACHE based RAM to keep console output before it can be
+	  saved in a CBMEM buffer. 3K bytes should be enough even for the
+	  BIOS_SPEW level.
+

choice
    prompt "Maximum console log level"