Hi, all I got a very encouraging hint from the conversation among anonya and Dan and kumar.
Dan wrote: > Depending upon your software > requirements and implementation, you are likely > able to run many of the same binaries across all > of the PowerPC cores. I have had a silly idea for some time. Could we have the same mini test kerenl for demo board and custom board? I made a 2.4 8xx kernel which only supported monitor port/RAMDISK/EXT2 in size of 250KB. And the mini test kernel can run right on my custom board and demo board at the same time. From the Dan's words, could I deduce a possibility that we can make a common mini test kerenl which only support Monitor/RAMDISK/EXT2 for 8xx/82xx/85xx? Or even better work on all PowerPC boards? There are two advantages of common mini test kernel. 1) We can use it to test ported boards whether they are in a workable state once they are in an unexpected situation. 2) We could use the mini kernel to make monitor port work at first. Anyway, monitor port is a vary important and first port we need most time. Also we can test a custom board whether there is any hardware or configuration default in boot loader like SDRAM init, which would help a newbie and port process a lot. Following is my downsized result of a 2.4.18 kernel on a PPC 8xx board. Just support Monitor Port, RAMDISK and EXT2. No Ethernet/NFS/ etc. 13 items only. I cannot trim down it anymore. :-) CONFIG_RWSEM_XCHGADD_ALGORITHM=y CONFIG_PPC=y CONFIG_PPC32=y CONFIG_8xx=y CONFIG_SERIAL_CONSOLE=y CONFIG_NOT_COHERENT_CACHE=y CONFIG_RPXLITE=y CONFIG_BINFMT_ELF=y CONFIG_BLK_DEV_RAM=y CONFIG_BLK_DEV_RAM_SIZE=4096 CONFIG_BLK_DEV_INITRD=y CONFIG_EXT2_FS=y CONFIG_MSDOS_PARTITION=y The final size is 258660 Bytes = 252.60 kB = 0.25 MB in compressed format. It worked fine on demo board and custom board. Could this one work for other 8xx boards or even 82xx/85xx boards? Or at least this mini configuration could work commonly for PowerPC board? I'd like to know how far my silly idea would go. Suggestion and comment, pls. ===== Best regards, Sam _________________________________________________________ Do You Yahoo!? 150??MP3???????????? http://music.yisou.com/ ??????????????????? http://image.yisou.com 1G??1000??????????? http://cn.rd.yahoo.com/mail_cn/tag/1g/*http://cn.mail.yahoo.com/event/mail_1g/
