Thank you for your advice, I did as you say, but the ide_init() failed, do you meet the problem ? or you have change the code? -----Original Message----- From: Steve Gehlbach [mailto:steve@nexpath.com] Sent: 2003年4月10日 13:26 To: Terry B. Chen Cc: LinuxBIOS Subject: Re: about BOOT_IDE
Terry B. Chen wrote:
Dear all:
I decide to elf_boot use BOOT_IDE, because the rom is too smallto settle a big kernel that support.
Can some one tell me the usage of the options such as ONE_TRACK and how to put the elf to hard disk, I think it must be dangerous, it seem to read the sector directly. Someone can teach me a little?
See pcchips787.config in util/config for complete configuration.
option BOOT_IDE=1 This enables booting from IDE, the file to use is linux.bin.gz:
option IDE_BOOT_DRIVE=2 If you do not use drive 0 (default), then you can set which drive to boot; (0,1,2,3) are the four standard PC drives:
option ONE_TRACK=32 The linux.bin.gz file is put in raw form at partition 1, ie, the first partition on the disk. This is located just past the partition table. The partition table size varies, it is "one track" from the beginning of the disk. "one track" in c/h/s notation is "s" or the number of sectors per track. ONE_TRACK is in sectors, the software multiplies by 512. Most disks are 63 sectors per track (the default), but my CF is 32 sectors per track. eg, the partion table is 63x512 or 32x512 bytes.
You can partition your disk as you want, but linux goes raw in partition 1; just make sure partition 1 is big enough, not a problem on today's disks. You could put the linux root file system on partition 2, for example. In pcchips787.config, I put the linux root file system on IDE 0, partition 2 (I was experimenting with linux in partition 1), but I eventually put linux on drive 2 using CF. You are right, copying of linux.bin.gz raw to the partition is dangerous, and something like "cat linux.bin.gz > /dev/hda1" will definitely screw the disk if you put the wrong disk or partition. I recommend a shell script, fingers cannot be trusted. You can also use "dd" but "cat" works.