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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 <vbendeb@chromium.org>
Reviewed-on: https://gerrit-int.chromium.org/5855
Tested-by: Vadim Bendebury <vbendeb@google.com>
Reviewed-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/718
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This commit is contained in:
Vadim Bendebury 2011-09-28 13:51:30 -07:00 committed by Stefan Reinauer
parent f2f9386b64
commit c34b463128
1 changed files with 27 additions and 0 deletions
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27
src/console/Kconfig
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@ -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"