We can't currently use asm-ppc/page.h in vmlinux.lds.S, so until
we have a merged page.h, define PAGE_SIZE and KERNELBASE locally.
Also gets rid of some dynamic executable cruft that we had for
32-bit.  With -Ttext=$(KERNELBASE) this didn't cause any problem,
but when we changed to putting . = KERNELBASE in the vmlinux.lds.S
this cruft caused the text to get linked at 0xa0 instead of
0xc0000000.  Oops.

Signed-off-by: Paul Mackerras <paulus@samba.org>

Currently we set the kernel entry point and the address of the text
section in the Makefile, using CONFIG_KERNEL_START.

But we've already got <asm/page.h> in the linker script, so we can just
use KERNELBASE directly. That means if we ever change KERNELBASE there's
one less place to change it.

And we can set the entry point with ENTRY().

There are zero differences from "readelf -a vmlinux" with or without this
patch.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>

Also adds the definition of the _sdata symbol to the ppc64 vmlinux.lds.S.

Signed-off-by: Paul Mackerras <paulus@samba.org>

This is needed by arch/powerpc/mm/mem.c now.

Signed-off-by: Paul Mackerras <paulus@samba.org>

Merge vmlinux.lds.S.
Also remove arch/powerpc/kernel/vmlinux.lds which is a
generated file.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

This creates the directory structure under arch/powerpc and a bunch
of Kconfig files.  It does a first-cut merge of arch/powerpc/mm,
arch/powerpc/lib and arch/powerpc/platforms/powermac.  This is enough
to build a 32-bit powermac kernel with ARCH=powerpc.

For now we are getting some unmerged files from arch/ppc/kernel and
arch/ppc/syslib, or arch/ppc64/kernel.  This makes some minor changes
to files in those directories and files outside arch/powerpc.

The boot directory is still not merged.  That's going to be interesting.

Signed-off-by: Paul Mackerras <paulus@samba.org>