linux-toradex.git/arch/powerpc/kernel/misc_32.S, branch v3.4.2

powerpc/4xx: Fix typos in kexec config dependencies

2011-11-16T03:47:54+00:00

Kexec is not supported on 47x. 47x is a variant of 44x with slightly
different MMU and SMP support. There was a typo in the config dependency
for kexec. This patch fixes the same.

Signed-off-by: Suzuki K. Poulose 
Signed-off-by: Paul Bolle 
Cc:	Kumar Gala 
Cc:	Josh Boyer 
Cc:	linux ppc dev 
Signed-off-by: Benjamin Herrenschmidt

powerpc/44x: Kexec support for PPC440X chipsets

2011-08-11T17:50:37+00:00

This patch adds kexec support for PPC440 based chipsets.  This work is based
on the KEXEC patches for FSL BookE.

The FSL BookE patch and the code flow could be found at the link below:

	http://patchwork.ozlabs.org/patch/49359/

Steps:

1) Invalidate all the TLB entries except the one this code is run from
2) Create a tmp mapping for our code in the other address space and jump to it
3) Invalidate the entry we used
4) Create a 1:1 mapping for 0-2GiB in blocks of 256M
5) Jump to the new 1:1 mapping and invalidate the tmp mapping

I have tested this patches on Ebony, Sequoia boards and Virtex on QEMU.

You need kexec-tools commit e8b7939b1e or newer for ppc440x support, 
available at:

 git://git.kernel.org/pub/scm/utils/kernel/kexec/kexec-tools.git

Signed-off-by: 	Suzuki Poulose 
Cc:	Sebastian Andrzej Siewior 
Signed-off-by: Josh Boyer

powerpc: Fix 32-bit SMP build

2011-05-20T23:23:19+00:00

Commit 69e3cea8d5fd526 ("powerpc/smp: Make start_secondary_resume
available to all CPU variants") introduced start_secondary_resume to
misc_32.S, however it uses a 64-bit instruction which is not valid on
32-bit platforms.  Use 'stw' instead.

Reported-by: Richard Cochran 
Tested-by: Richard Cochran 
Signed-off-by: Josh Boyer 
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Linus Torvalds

powerpc/smp: Make start_secondary_resume available to all CPU variants

2011-05-19T03:07:12+00:00

This should fix SMP & Hotplug builds on FSL BookE and 476

Signed-off-by: Benjamin Herrenschmidt

powerpc: Remove second definition of STACK_FRAME_OVERHEAD

2010-11-29T04:48:23+00:00

Since STACK_FRAME_OVERHEAD is defined in asm/ptrace.h and that
is ASSEMBER safe, we can just include that instead of going via
asm-offsets.h.

Signed-off-by: Stephen Rothwell 
Signed-off-by: Benjamin Herrenschmidt

powerpc/kexec: Adds correct calling convention for kexec purgatory

2010-08-31T01:35:12+00:00

Call kexec purgatory code correctly. We were getting lucky before.
If you examine the powerpc 32bit kexec "purgatory" code you will
see it expects the following:

>From kexec-tools: purgatory/arch/ppc/v2wrap_32.S
-> calling convention:
->   r3 = physical number of this cpu (all cpus)
->   r4 = address of this chunk (master only)

As such, we need to set r3 to the current core, r4 happens to be
unused by purgatory at the moment but we go ahead and set it
here as well

Signed-off-by: Matthew McClintock 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Unconditionally enabled irq stacks

2010-06-15T05:02:37+00:00

Irq stacks provide an essential protection from stack overflows through
external interrupts, at the cost of two additionals stacks per CPU.

Enable them unconditionally to simplify the kernel build and prevent
people from accidentally disabling them.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Benjamin Herrenschmidt

powerpc/kexec: Add support for FSL-BookE

2010-05-25T02:25:32+00:00

This adds support kexec on FSL-BookE where the MMU can not be simply
switched off. The code borrows the initial MMU-setup code to create the
identical mapping mapping. The only difference to the original boot code
is the size of the mapping(s) and the executeable address.
The kexec code maps the first 2 GiB of memory in 256 MiB steps. This
should work also on e500v1 boxes.
SMP support is still not available.

(Kumar: Added minor change to build to ifdef CONFIG_PPC_STD_MMU_64 some
code that was PPC64 specific)

Signed-off-by: Sebastian Andrzej Siewior 
Signed-off-by: Kumar Gala

powerpc/47x: Base ppc476 support

2010-05-05T13:11:10+00:00

This patch adds the base support for the 476 processor.  The code was
primarily written by Ben Herrenschmidt and Torez Smith, but I've been
maintaining it for a while.

The goal is to have a single binary that will run on 44x and 47x, but
we still have some details to work out.  The biggest is that the L1 cache
line size differs on the two platforms, but it's currently a compile-time
option.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Torez Smith  
Signed-off-by: Dave Kleikamp 
Signed-off-by: Josh Boyer

powerpc/8xx: Start using dcbX instructions in various copy routines

2009-12-09T06:10:37+00:00

Now that 8xx can fixup dcbX instructions, start using them
where possible like every other PowerPc arch do.

Signed-off-by: Joakim Tjernlund 
Signed-off-by: Benjamin Herrenschmidt