The merged verison of ELF_CORE_COPY_REGS is basically the PPC64 version, with
a memset that came from PPC and a few types abstracted out into #defines. But
it's not _quite_ right.

The first problem is we calculate the number of registers with:
        nregs = sizeof(struct pt_regs) / sizeof(ELF_GREG_TYPE)

For a 32-bit process on a 64-bit kernel that's bogus because the registers are
64 bits, but ELF_GREG_TYPE is u32, so nregs == 88 which is wrong.

The other problem is the memset, which assumes a struct pt_regs is smaller
than a struct elf_regs. For a 32-bit process on a 64-bit kernel that's false.

The fix is to calculate the number of regs using sizeof(unsigned long), which
should always be right, and just memset the whole damn thing _before_ copying
the registers in.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>

There's no reason for smp_release_cpus() to be asm, and most people can make
more sense of C code. Add an extern declaration to smp.h and remove the custom
one in machine_kexec.c
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

register_vpa() doesn't actually do a VPA register call it just uses the flags
you pass it, so rename it to vpa_call() to be clearer.

We can then define register_vpa() and unregister_vpa() which are both simple
wrappers around vpa_call(). (we'll need unregister_vpa() for kexec soon)

We can then cleanup vpa_init(), and because vpa_init() is only called from
platforms/pseries we remove the definition in asm-ppc64/smp.h.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>

There's a few places already, and soon will be more, where we synthesise
branch instructions at runtime. Rather than doing it by hand in each case,
it would make sense to have one implementation.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>

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>

There's some debugging in prom.c that wraps nastly on 80 character
terminals, reformat it to fit.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>

Merge include/asm-ppc/kexec.h and include/asm-ppc64/kexec.h.

The only thing that's really changed is that we now allocate crash_notes
properly on PPC32. It's address is exported via sysfs, so it's not correct
for it to be a pointer.

I've also removed some of the "we don't use this" comments, because they're
wrong (or perhaps were referring only to arch code).
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>

Move plpar_wrappers.h into arch/powerpc/platforms/pseries, fixup white space,
and update callers.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>

Move pSeries specific code in set_dabr() into a ppc_md function, this will
allow us to keep plpar_wrappers.h private to platforms/pseries.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>

Copy default configs into arch/powerpc/configs, rename bpa_defconfig to
cell_defconfig while we're at it.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>

Include asm/rtas.h for prototype for rtas_call etc., and make the
`done' variable unsigned int since that's what rtas_call wants.
Signed-off-by: Paul Mackerras <paulus@samba.org>

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

since it uses the lmb stuff in one place.
Signed-off-by: Paul Mackerras <paulus@samba.org>

These days, the NACA only exists on iSeries.  Therefore, this patch
moves naca.h from include/asm-ppc64 to arch/powerpc/platforms/iseries.
There was one file including naca.h outside of platforms/iseries -
arch/ppc64/kernel/udbg_scc.c.  However, that's obviously a hangover
from older days.  The include is not necessary, so this patch simply
removes it.

Built and booted on iSeries, built for G5 (which uses udbg_scc.o).
Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

Signed-off-by: Kelly Daly <kelly@au.ibm.com>

asm-ppc64/dart.h is included in exactly one place -
arch/powerpc/sysdev/u3_iommu.c.  This patch, therefore, moves it into
arch/powerpc/sysdev.  While we're at it, update the #ifndef/#define
protecting the include, and the filename in the comments of
u3_iommu.c.

Built and booted on pSeries and G5, built for ppc32 powermac.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

The ppc64 versions of numnodes.h and sparsemem.h can be safely moved
to asm-powerpc with no changes apart from changing the #define to the
standard _ASM_POWERPC_ form.  There are no ppc32 versions of these
files, because they only have any effect if CONFIG_SPARSEMEM is
enabled, which it never can be on ppc32.

Built and booted on pSeries (POWER5), built for 32-bit powermac.
Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

Signed-off-by: Kelly Daly <kelly@au.ibm.com>

This simplifies the macros which are different between 32-bit and
64-bit.  It also fixes a couple of printks on the bug->line element,
which is now a long.
Signed-off-by: Paul Mackerras <paulus@samba.org>

Signed-off-by: Kelly Daly <kelly@au.ibm.com>

Signed-off-by: Kelly Daly <kelly@au.ibm.com>

We were getting powerbook sleep code included, and giving compile
errors, with CONFIG_PM=y on a 64-bit build.  This excludes that code
so the kernel will compile.  One day BenH will implement on sleep on
the G5...
Signed-off-by: Paul Mackerras <paulus@samba.org>

Signed-off-by: Kelly Daly <kelly@au.ibm.com>

A couple of instances of "i" that needed to be changed to "cpu_id"
got missed in the merge, because they were in CONFIG_TAU code.
Signed-off-by: Paul Mackerras <paulus@samba.org>

The nvram driver imported from the ppc code uses call_rtas, but
rtas_call is the name we are using in merged code (since ppc64 used
that name, and it uses far more RTAS calls than ppc32).
Signed-off-by: Paul Mackerras <paulus@samba.org>

Signed-off-by: Kelly Daly <kelly@au.ibm.com>

DATA_TYPE is really not a good thing to put into header that
gets included all over the tree...

Just make the cast always (long) and get rid of DATA_TYPE altogether.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Paul Mackerras <paulus@samba.org>

Signed-off-by: Kelly Daly <kelly@au.ibm.com>

This patch merges the ppc32 and ppc64 versions of futex.h, essentially
by taking the ppc64 version as the powerpc version.  The old ppc32
version did not implement the futex_atomic_op_inuser() callback (it
always returned -ENOSYS), so FUTEX_WAKE_OP would not work on ppc32.
In fact the ppc64 version of this function is almost suitable for
ppc32 as well - the only change needed is to extend ppc_asm.h with a
macro expanding to to the right pseudo-op to store a pointer (either
".long" or ".llong").

Built and booted on pSeries.  Built for 32-bit powermac.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

Oops, when merging ipcbuf.h, I forgot that 'u64' can't be used in
user-visible headers.  This patch corrects the problem, replacing the
unused fields with an array of four __u32s.
Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

Signed-off-by: Kelly Daly <kelly@au.ibm.com>

Signed-off-by: Kelly Daly <kelly@au.ibm.com>

Signed-off-by: Kelly Daly <kelly@au.ibm.com>

Signed-off-by: Kelly Daly <kelly@au.ibm.com>

Signed-off-by: Kelly Daly <kelly@au.ibm.com>

Signed-off-by: Kelly Daly <kelly@au.ibm.com>