linux.git/arch/powerpc/Kconfig.debug, branch v2.6.26-rc7

[POWERPC] Add IRQSTACKS support on ppc32

2008-04-29T05:57:34+00:00

This makes it possible to use separate stacks for hard and soft IRQs
on 32-bit powerpc as well as on 64-bit.  The code for 32-bit is just
the 32-bit analog of the 64-bit code.

* Added allocation and initialization of the irq stacks.  We limit the
  stacks to be in lowmem for ppc32.
* Implemented ppc32 versions of call_do_softirq() and call_handle_irq()
  to switch the stack pointers
* Reworked how we do stack overflow detection.  We now keep around the
  limit of the stack in the thread_struct and compare against the limit
  to see if we've overflowed.  We can now use this on ppc64 if desired.

[ paulus@samba.org: Fixed bug on 6xx where we need to reload r9 with the
  thread_info pointer. ]

Signed-off-by: Kumar Gala 
Signed-off-by: Paul Mackerras

KVM: ppc: PowerPC 440 KVM implementation

2008-04-27T15:21:39+00:00

This functionality is definitely experimental, but is capable of running
unmodified PowerPC 440 Linux kernels as guests on a PowerPC 440 host. (Only
tested with 440EP "Bamboo" guests so far, but with appropriate userspace
support other SoC/board combinations should work.)

See Documentation/powerpc/kvm_440.txt for technical details.

[stephen: build fix]

Signed-off-by: Hollis Blanchard 
Acked-by: Paul Mackerras 
Signed-off-by: Stephen Rothwell 
Signed-off-by: Avi Kivity

[POWERPC] cpm-serial: Relocate CPM buffer descriptors and SMC parameter ram.

2008-04-17T06:01:37+00:00

This patch relocates the buffer descriptors and the SMC parameter RAM at the
end of the first CPM muram chunk, as described in the device tree. This allows
device trees to stop excluding SMC parameter ram allocated by the boot loader
from the CPM muram node.

Signed-off-by: Laurent Pinchart 
Acked-by: Scott Wood 
Signed-off-by: Kumar Gala

[POWERPC] 4xx: Base support for 440GX Taishan eval board

2007-12-23T19:13:33+00:00

This patch adds base support for the AMCC Taishan 440GX evaluation
board.

Signed-off-by: Hugh Blemings 
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Josh Boyer

[POWERPC] 4xx: Add early udbg support for 40x processors

2007-12-23T19:13:03+00:00

This adds some basic real mode based early udbg support for 40x
in order to debug things more easily

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Josh Boyer

[POWERPC] Early debug forces console log level to max

2007-12-11T04:43:35+00:00

This makes the early debug option force the console loglevel
to the max.  The early debug option is meant to catch messages very
early in the kernel boot process, in many cases, before the kernel
has a chance to parse the "debug" command line argument.  Thus it
makes sense when CONFIG_PPC_EARLY_DEBUG is set, to force the console
log level to the max at boot time.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Paul Mackerras

[POWERPC] 4xx: Split early debug output and early boot console for 44x

2007-10-19T21:18:18+00:00

Currently there's no way to enable early boot console on PowerPC 44x
not specifying uart's physical address in kernel config, which is used
for very early debug messages. This patch splits very early debug output
(which needs uart physical address in kernel config) and early boot console
(which searches for uarts in the device tree using find_legacy_serial_ports).
We enable early boot console for all 44x processors, while (dangerous)
early debug is user-selectable.

Signed-off-by: Valentine Barshak 
Signed-off-by: Josh Boyer

kconfig: syntax cleanup - drop support for "depends/requires/def_boolean"

2007-10-12T19:20:32+00:00

Remove the following redundant and never or rarely used kconfig syntax:

- "def_boolean" (same as "def_bool")
- "requires" (same as "depends on")
- "depends" (same as "depends on")

This patch contains the code changes and Kconfig updates.
The shipped files are in next patch to let actual codechange stand out.

Signed-off-by: Adrian Bunk 
Cc: "Randy.Dunlap" 
Cc: Bryan Wu 
Cc: Paul Mackerras 
Cc: Benjamin Herrenschmidt 
Cc: Dmitry Torokhov 
Cc: "John W. Linville" 
Cc: Roman Zippel 
Cc: Richard Purdie 
Signed-off-by: Andrew Morton 
Signed-off-by: Sam Ravnborg

[POWERPC] cpm: Describe multi-user ram in its own device node.

2007-10-04T20:47:05+00:00

The way the current CPM binding describes available multi-user (a.k.a.
dual-ported) RAM doesn't work well when there are multiple free regions,
and it doesn't work at all if the region doesn't begin at the start of
the muram area (as the hardware needs to be programmed with offsets into
this area).  The latter situation can happen with SMC UARTs on CPM2, as its
parameter RAM is relocatable, u-boot puts it at zero, and the kernel doesn't
support moving it.

It is now described with a muram node, similar to QE.  The current CPM
binding is sufficiently recent (i.e. never appeared in an official release)
that compatibility with existing device trees is not an issue.

The code supporting the new binding is shared between cpm1 and cpm2, rather
than remain separated.  QE should be able to use this code as well, once
minor fixes are made to its device trees.

Signed-off-by: Scott Wood 
Signed-off-by: Kumar Gala

[POWERPC] Add early debug console for CPM serial ports.

2007-10-04T01:35:43+00:00

This code assumes that the ports have been previously set up, with
buffers in DPRAM.

Signed-off-by: Scott Wood 
Acked-by: David Gibson 
Signed-off-by: Kumar Gala