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| author | Sven Schnelle <svens@stackframe.org> | 2011-05-02 19:53:04 +0000 |
|---|---|---|
| committer | Sven Schnelle <svens@stackframe.org> | 2011-05-02 19:53:04 +0000 |
| commit | 8eee19d0eafd3a34742df4d26c810424097211fe (patch) | |
| tree | 32d7e6a6e0fc459a9e92f9907e201dcb94023fab | |
| parent | 4ee7d80e06a206a248a265348669b78150ba059d (diff) | |
| download | coreboot-8eee19d0eafd3a34742df4d26c810424097211fe.tar.xz | |
Add option 'compress ramstage'
Add an option to make compression of ramstage configurable. Right now
it is always compressed. On my Thinkpad, the complete boot to grub takes
4s, with around 1s required for decompressing ramstage. This is probably
caused by the fact the decompression does a lot of single byte/word/qword
accesses, which are really slow on SPI buses. So give the user the option
to store ramstage uncompressed, if he has enough memory.
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Acked-by: Patrick Georgi <patrick@georgi-clan.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6552 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
| -rw-r--r-- | Makefile.inc | 4 | ||||
| -rw-r--r-- | src/Kconfig | 8 |
2 files changed, 12 insertions, 0 deletions
diff --git a/Makefile.inc b/Makefile.inc index 6c4a16ac0c..6267539884 100644 --- a/Makefile.inc +++ b/Makefile.inc @@ -85,7 +85,11 @@ cbfs-files-handler= \ ####################################################################### # a variety of flags for our build +CBFS_COMPRESS_FLAG:= +ifeq ($(CONFIG_COMPRESS_RAMSTAGE),y) CBFS_COMPRESS_FLAG:=l +endif + CBFS_PAYLOAD_COMPRESS_FLAG:= CBFS_PAYLOAD_COMPRESS_NAME:=none ifeq ($(CONFIG_COMPRESSED_PAYLOAD_LZMA),y) diff --git a/src/Kconfig b/src/Kconfig index 76e77f8401..9abbc2169d 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -98,6 +98,14 @@ config USE_OPTION_TABLE Enable this option if coreboot shall read options from the "CMOS" NVRAM instead of using hard coded values. +config COMPRESS_RAMSTAGE + bool "Compress ramstage with LZMA" + default y + help + Compress ramstage to save memory in the flash image. Note + that decompression might slow down booting if the boot flash + is connected through a slow Link (i.e. SPI) + endmenu source src/mainboard/Kconfig |