• Suzuki Poulose's avatar
    powerpc/boot: Change the load address for the wrapper to fit the kernel · c55aef0e
    Suzuki Poulose authored
    
    
    The wrapper code which uncompresses the kernel in case of a 'ppc' boot
    is by default loaded at 0x00400000 and the kernel will be uncompressed
    to fit the location 0-0x00400000. But with dynamic relocations, the size
    of the kernel may exceed 0x00400000(4M). This would cause an overlap
    of the uncompressed kernel and the boot wrapper, causing a failure in
    boot.
    
    The message looks like :
    
       zImage starting: loaded at 0x00400000 (sp: 0x0065ffb0)
       Allocating 0x5ce650 bytes for kernel ...
       Insufficient memory for kernel at address 0! (_start=00400000, uncompressed size=00591a20)
    
    This patch shifts the load address of the boot wrapper code to the next
    higher MB, according to the size of  the uncompressed vmlinux.
    
    With the patch, we get the following message while building the image :
    
     WARN: Uncompressed kernel (size 0x5b0344) overlaps the address of the wrapper(0x400000)
     WARN: Fixing the link_address of wrapper to (0x600000)
    Signed-off-by: default avatarSuzuki K. Poulose <suzuki@in.ibm.com>
    Signed-off-by: default avatarJosh Boyer <jwboyer@gmail.com>
    c55aef0e