linux-toradex.git/include/asm-powerpc/mpic.h, branch v2.6.24.2

[POWERPC] Update mpic to use dcr_host_t.base

2007-10-03T03:25:27+00:00

Now that dcr_host_t contains the base address, we can use that in the mpic
code, rather than storing it separately.

Signed-off-by: Michael Ellerman 
Acked-by: Benjamin Herrenschmidt 
Signed-off-by: Paul Mackerras

[POWERPC] Add workaround for MPICs with broken register reads

2007-09-13T15:33:25+00:00

Some versions of PWRficient 1682M have an interrupt controller in which
the first register in each pair for interrupt sources doesn't always
read with the right polarity/sense values.

To work around this, keep a software copy of the register instead.  Since
it's not modified from the mpic itself, it's a feasible solution.  Still,
keep it under a config option to avoid wasting memory on other platforms.

Signed-off-by: Olof Johansson 
Signed-off-by: Paul Mackerras

[POWERPC] Add an optional device_node pointer to the irq_host

2007-09-13T15:33:20+00:00

The majority of irq_host implementations (3 out of 4) are associated
with a device_node, and need to stash it somewhere. Rather than having
it somewhere different for each host, add an optional device_node pointer
to the irq_host structure.

Signed-off-by: Michael Ellerman 
Signed-off-by: Paul Mackerras

[POWERPC] MPIC protected sources

2007-07-22T11:30:59+00:00

Some HW platforms, such as the new cell blades, requires some MPIC sources
to be left alone by the operating system. This implements support for
a "protected-sources" property in the mpic controller node containing a list
of source numbers to be protected against operating system interference.

For those interested in the gory details, the MPIC on the southbridge of
those blades has some of the processor outputs routed to the cell, and
at least one routed as a GPIO to the service processor. It will be used
in the GA product for routing some of the southbridge error interrupts
to the service processor which implements some of the RAS stuff, such
as checkstopping when fatal errors occurs before they can propagate.

Signed-off-by: Benjamin Herrenschmidt 
Acked-by: Arnd Bergmann 
Signed-off-by: Paul Mackerras

[POWERPC] MPIC MSI allocator

2007-05-08T03:43:48+00:00

To support MSI on MPIC we need a way to reserve and allocate hardware irq
numbers, this patch implements an allocator for that purpose.

New firmware platforms must define a "msi-available-ranges" property on their
MPIC node for MSI to work. For U3/U4 we do a best-guess setup.

Signed-off-by: Michael Ellerman 
Signed-off-by: Paul Mackerras

[POWERPC] MPIC sys_device & suspend/resume

2007-05-07T10:31:13+00:00

This adds mpic to the system devices and implements suspend
and resume for them.  This is necessary to get interrupts for
modules back to where they were before a suspend to disk.

Signed-off-by: Johannes Berg 
Acked-by: Benjamin Herrenschmidt 
Signed-off-by: Paul Mackerras

[POWERPC] Rename MPIC_BROKEN_U3 to MPIC_U3_HT_IRQS

2007-04-24T12:06:58+00:00

Rename MPIC_BROKEN_U3 to something a little more descriptive. Its
effect is to enable support for HT irqs behind the PCI-X/HT bridge on
U3/U4 (aka. CPC9x5) parts.

Signed-off-by: Michael Ellerman 
Signed-off-by: Paul Mackerras

[POWERPC] MPIC: support more than 256 sources

2007-02-07T03:03:19+00:00

Allow more than the default 256 MPIC sources. Allocates a new flag
(MPIC_LARGE_VECTORS) to be used by platform code when instantiating
the mpic.

I picked 11 bits worth right now since it would cover the number of
sources on any hardware I have seen. It can always be increased later
if needed.

Signed-off-by: Olof Johansson 
Signed-off-by: Paul Mackerras

[POWERPC] Improve MPIC driver auto-configuration from DT

2006-12-04T05:08:41+00:00

This patch applies on top of the MPIC DCR support. It makes the MPIC
driver capable of a lot more auto-configuration based on the device-tree,
for example, it can retreive it's own physical address if not passed as
an argument, find out if it's DCR or MMIO mapped, and set the BIG_ENDIAN
flag automatically in the presence of a "big-endian" property in the
device-tree node.

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

[POWERPC] Support for DCR based MPIC

2006-12-04T05:08:35+00:00

This patch implements support for DCR based MPIC implementations. Such
implementations have the MPIC_USES_DCR flag set and don't use the phys_addr
argument of mpic_alloc (they require a valid dcr mapping in the device node)

This version of the patch can use a little bif of cleanup still (I can
probably consolidate rb->dbase/doff, at least once I'm sure on how the
hardware is actually supposed to work vs. possible simulator issues) and
it should be possible to build a DCR-only version of the driver. I need
to cleanup a bit the CONFIG_* handling for that and probably introduce
CONFIG_MPIC_MMIO and CONFIG_MPIC_DCR.

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