[Bug 1250495] Re: armhf: highbank: relocate initrd to make room for a bigger kernel

[Paolo Pisati]

this fix should be propagated back to every Ubuntu release that will
carry a modern, multiplatform, generic armhf kernel.

** Patch added: "bootscr.highbank.diff"
   https://bugs.launchpad.net/ubuntu/+source/flash-kernel/+bug/1250495/+attachment/3906544/+files/bootscr.highbank.diff

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Title:
  armhf: highbank: relocate initrd to make room for a bigger kernel

Status in “flash-kernel” package in Ubuntu:
  New

Bug description:
  Our kernels are growing big, thus if we want to avoid vmlinuz stomp
  over initrd after decompression, we should relocate initrd leaving
  more room for a bigger kernel.

  It already happens with our T/master generic kernel on highbank:

  boot.scr:

  echo Starting Ubuntu...
  setenv bootargs console=ttyAMA0 nosplash
  mw.l 800000 0 10000
  scsi scan
  ext2load scsi 0 0x800000 vmlinuz
  ext2load scsi 0 0x1000000 initrd.img
  bootz 0x800000 0x1000000:${filesize} 0x1000

  ...
  [    1.953323] scsi 2:0:0:0: Direct-Access     ATA      SAMSUNG SSD 830  CXM0 PQ: 0 ANSI: 5
  [    1.961785] sd 2:0:0:0: [sda] 250069680 512-byte logical blocks: (128 GB/119 GiB)
  [    1.961853] sd 2:0:0:0: Attached scsi generic sg0 type 0
  [    1.974782] sd 2:0:0:0: [sda] Write Protect is off
  [    1.979650] sd 2:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
  [    1.990153]  sda: sda1 sda2 sda3 < sda5 sda6 >
  [    1.995656] sd 2:0:0:0: [sda] Attached SCSI disk
  [    2.300204] ata4: SATA link down (SStatus 0 SControl 300)
  [    2.644202] ata5: SATA link down (SStatus 0 SControl 300)
  [    2.649653] md: Waiting for all devices to be available before autodetect
  [    2.656454] md: If you don't use raid, use raid=noautodetect
  [    2.662474] md: Autodetecting RAID arrays.
  [    2.666573] md: Scanned 0 and added 0 devices.
  [    2.671014] md: autorun ...
  [    2.673805] md: ... autorun DONE.
  [    2.677180] RAMDISK: Couldn't find valid RAM disk image starting at 0.
  ...

  while moving initrd futher up, fixes it:

  boot.scr:

  setenv bootargs console=ttyAMA0 nosplash
  mw.l 800000 0 10000
  scsi scan
  ext2load scsi 0 0x800000 vmlinuz
  ext2load scsi 0 0x2000000 initrd.img
  bootz 0x800000 0x2000000:${filesize} 0x1000

  
  ubuntu at c09:~$ uname -a
  Linux c09 3.12.0-2-generic #7 SMP Tue Nov 12 12:50:26 UTC 2013 armv7l armv7l armv7l GNU/Linux

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