Attempt to "tidy" up some of the multi IRQ handling and base + IRQ
management. This should keep it limping along without too much hassle,
and no new parts should ever be enabling or using this API anyways.

It doesn't get any closer to lipstick on a pig as this.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

We don't support the ISA DMA API, so this is only ever misused. The
dma-sh case inadvertently broke the dreamcast case by testing the wrong
variable for the total number of channels, so this fixes that up too.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

This has turned in to quite a mess, and with CPUs that care using
dmaengine now it's about time to start cleaning up after the legacy DMA
code. For starters, kill off the stubs for the CPUs that don't do
anything, as well as all of the unused definitions. This leaves us with a
set of IRQs and base addresses we can deal with later.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

cpu-sh4a headers take priority over cpu-sh4 ones by virtue of the build
system, there's no need to try and mingle sh4a stuff in cpu-sh4.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

With the previous attempt reverted this switches to conditionalizing the
end address. Nominally VMALLOC_END, but extended for P3_ADDR_MAX in the
store queue case.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

This reverts commit 20e7c297.
With store queues enabled the area above P4SEG has special properties
from the MMU's point of view, which was causing fixmap failure. We'll
have to do something else to satisfy the vmalloc range check.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

In doing the evt2irq() + muxed vector conversion for various port types
it became apparent that some of the legacy port types will presently
error out due to the irq requesting logic attempting to acquire the
non-existent BRI IRQ. This adds some sanity checks to the request/free
path to ensure that non-existence of a source in itself is not an error.

This should restore functionality for legacy PORT_SCI ports.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Conflicts:
	arch/sh/kernel/cpu/sh3/setup-sh770x.c
	arch/sh/kernel/cpu/sh3/setup-sh7710.c
	arch/sh/kernel/cpu/sh3/setup-sh7720.c
	arch/sh/kernel/cpu/sh4/setup-sh7750.c
	arch/sh/kernel/cpu/sh4a/setup-sh7343.c
	arch/sh/kernel/cpu/sh4a/setup-sh7366.c
	arch/sh/kernel/cpu/sh4a/setup-sh7722.c
	arch/sh/kernel/cpu/sh4a/setup-sh7723.c
	arch/sh/kernel/cpu/sh4a/setup-sh7724.c
	arch/sh/kernel/cpu/sh4a/setup-sh7757.c
	arch/sh/kernel/cpu/sh4a/setup-sh7763.c
	arch/sh/kernel/cpu/sh4a/setup-sh7770.c
	arch/sh/kernel/cpu/sh4a/setup-sh7785.c
	arch/sh/kernel/cpu/sh4a/setup-sh7786.c
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

This converts over the legacy PCI IRQs to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

This migrates the cpu-family relative DMA IRQ definitions over to
evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate sh7763rdp to evt2irq backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate sdk7780 to evt2irq backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate migor to evt2irq backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate landisk to evt2irq backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate kfr2r09 to evt2irq backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate ecovec24 to evt2irq backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate ap325rxa to evt2irq backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate urquell to evt2irq backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate sh7785lcr to evt2irq backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate hp6xx to evt2irq backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate Solution Engine boards to evt2irq backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate sh7757lcr to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate magicpanelr2 to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate espt to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate edosk7760 to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate edosk7705 to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate SH7720 to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate SH7710/SH7712 to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate SH770x to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate SH7705 to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate SH7760 to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate SH7750 to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate SH4-202 to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate SH-X3 to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate SH7785 to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate SH7780 to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate SH7770 to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate SH7763 to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate SH7757 to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

Migrate SH7724 to evt2irq() backed hwirq lookups.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>