Stefan Reinauer wrote: > * Carl-Daniel Hailfinger wrote: > > > What we need from you is a way to use nrv2b compressed ELF images as > > payload. Please don't say that is impossible. > > CONFIG_COMPRESSED_ROM_STREAM does exactly that. > > You need to give it an uncompressed payload since it does compression on > its own.
ARGH! Now that indeed explains things very well. Attached is a patch to make LinuxBIOS support precompressed payloads. While the LinuxBIOS build system can compress payloads on its own, the OLPC build system benefits from delivering a precompressed (and size-checked) payload. Although the patch modifies targets/olpc/rev_a/Config.1M.lb this has no effect on current OLPC buildrom because it checks out an earlier revision of LinuxBIOS. So it should be a safe to apply. As a reply to this message, I'll post the necessary OLPC buildrom changes to make use of the new infrastructure. Regards, Carl-Daniel -- Echte DSL-Flatrate dauerhaft für 0,- Euro*. Nur noch kurze Zeit! "Feel free" mit GMX DSL: http://www.gmx.net/de/go/dsl
Index: src/mainboard/olpc/rev_a/Options.lb =================================================================== --- src/mainboard/olpc/rev_a/Options.lb (Revision 2357) +++ src/mainboard/olpc/rev_a/Options.lb (Arbeitskopie) @@ -22,6 +22,7 @@ uses ROM_SECTION_OFFSET uses CONFIG_ROM_STREAM_START uses CONFIG_COMPRESSED_ROM_STREAM +uses CONFIG_PRECOMPRESSED_ROM_STREAM uses PAYLOAD_SIZE uses _ROMBASE uses _RAMBASE Index: src/config/Options.lb =================================================================== --- src/config/Options.lb (Revision 2357) +++ src/config/Options.lb (Arbeitskopie) @@ -574,6 +574,11 @@ export always comment "compressed boot image is located in ROM" end +define CONFIG_PRECOMPRESSED_ROM_STREAM + default 0 + export always + comment "boot image is already compressed" +end define CONFIG_FS_STREAM default 0 export always Index: src/arch/i386/Config.lb =================================================================== --- src/arch/i386/Config.lb (Revision 2357) +++ src/arch/i386/Config.lb (Arbeitskopie) @@ -30,6 +30,7 @@ makedefine PAYLOAD-1:=payload makedefine PAYLOAD-$(CONFIG_COMPRESSED_ROM_STREAM):=payload.nrv2b +makedefine PAYLOAD-$(CONFIG_PRECOMPRESSED_ROM_STREAM):=payload makerule linuxbios.rom depends "linuxbios.strip buildrom $(PAYLOAD-1)" Index: targets/olpc/rev_a/Config.1M.lb =================================================================== --- targets/olpc/rev_a/Config.1M.lb (Revision 2357) +++ targets/olpc/rev_a/Config.1M.lb (Arbeitskopie) @@ -4,7 +4,8 @@ mainboard olpc/rev_a # leave 64k for vsa -option CONFIG_COMPRESSED_ROM_STREAM=0 +option CONFIG_COMPRESSED_ROM_STREAM=1 +option CONFIG_PRECOMPRESSED_ROM_STREAM=1 option ROM_SIZE=1024*1024-64*1024 option FALLBACK_SIZE=ROM_SIZE
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