Tim,
If you're going to load things by name in the bootldr, then the
partitions should match that of the kernel. It's a convenience thing in
the bootldr, because you can always use
load flash <addr>
to program flash anywhere.
The kernel uses the partitions to mount filesystems, etc., so those
partitions have to be correct.
If you can update the bootldr, then you can use bootldr partition tables
which are compiled into neither the bootldr or the kernel.
Jamey
> -----Original Message-----
> From: Tim Lindquist [mailto:[EMAIL PROTECTED]]
> Sent: Monday, July 16, 2001 12:19 PM
> To: [EMAIL PROTECTED]
> Subject: bootldr/MTD partitions
>
>
> I have some questions about the bootldr btflash.c
> and mtd sa1100-flash.c. I am using a Phase 5 Assabet,
> and have BIG_KERNEL set.
> First, here are the relevant sections of code:
>
> (btflash.c)
> { "bootldr", 0x00000000, 0x00040000, LFR_PATCH_BOOTLDR },
> { "params", 0x00040000, 0x00040000, 0 },
> { "kernel", 0x00080000, 0x000c0000, LFR_KERNEL },
> { "ramdisk", 0x00140000, 0x006c0000, LFR_SIZE_PREFIX },
> { "usercode", 0x00140000, 0x006c0000, 0 },
> { "jffs", 0x00800000, 0x00800000, LFR_ERASEALL }
>
> (sa1100-flash.c)
> {
> name: "bootloader",
> size: 0x00040000,
> offset: 0,
> mask_flags: MTD_WRITEABLE
> },{
> name: "bootloader params",
> size: 0x00040000,
> offset: 0x00040000,
> },{
> name: "kernel",
> size: 0x000c0000,
> offset: 0x00080000,
> },{
> name: "ramdisk",
> size: 0x006c0000,
> offset: 0x00140000,
> },{
> name: "jffs",
> size: 0x00800000,
> offset: 0x00800000
> }
>
> 1. Does there have to be a corresponding partition
> entry in sa1100-flash.c for every partition entry in
> btflash.c (many of which are aliases of same area, or overlap).
> I have only specfied mtd partitions that I will use (see above).
> IS this correct? Also, are there any special constraints on JFFS
> location: is it OK for jffs to start at 0x00800000?
>
> 2. Are the mtd partition names specified in sa1100-flash.c
> the ones I have to use in the linuxargs param in bootldr, or
> are they aliases for mtdblock0,1,2 ... ??
>
> ie if I want to set root to my jffs image (which I made from a
> ramdisk), do I set linuxargs to:
>
> linuxargs= noinitrd root=/dev/mtdblock4 init=/linuxrc console=ttySA0
>
> or
>
> linuxargs= noinitrd root=/dev/jffs init=/linuxrc console=ttySA0
>
>
>
> 3. Finally, is there anything in my partition descriptions that
> could cause problems. I have modified the original srcs, changing
> the start address and length of jffs partition. Previously my kernel
> would load successfully with bootldr, but now the transfer terminates
> at 665K.
>
> 4. I am using JDs 17 Apr bootldr patch on handhelds src of same
> period.
>
> Thanks to anyone that can help.
>
> Tim
>
>
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