linux.git/arch/sh/kernel/cpu/sh3/entry.S, branch v6.7

sh: Avoid using IRQ0 on SH3 and SH4

2023-06-11T16:22:47+00:00

IRQ0 is no longer returned by platform_get_irq() and its ilk -- they now
return -EINVAL instead.  However, the kernel code supporting SH3/4-based
SoCs still maps the IRQ #s starting at 0 -- modify that code to start the
IRQ #s from 16 instead.

The patch should mostly affect the AP-SH4A-3A/AP-SH4AD-0A boards as they
indeed are using IRQ0 for the SMSC911x compatible Ethernet chip.

Fixes: ce753ad1549c ("platform: finally disallow IRQ0 in platform_get_irq() and its ilk")
Signed-off-by: Sergey Shtylyov 
Reviewed-by: Geert Uytterhoeven 
Tested-by: Geert Uytterhoeven 
Reviewed-by: John Paul Adrian Glaubitz 
Tested-by: John Paul Adrian Glaubitz 
Link: https://lore.kernel.org/r/71105dbf-cdb0-72e1-f9eb-eeda8e321696@omp.ru
Signed-off-by: John Paul Adrian Glaubitz

arch: sh: remove duplicate include

2021-01-07T00:55:27+00:00

Remove duplicate header which is included twice.

Signed-off-by: Wang Qing 
Signed-off-by: Rich Felker

sh: sh3: convert to SPDX identifiers

2018-12-28T20:11:45+00:00

Update license to use SPDX-License-Identifier instead of verbose license
text.

Link: http://lkml.kernel.org/r/87bm60csyl.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Kuninori Morimoto 
Reviewed-by: Simon Horman 
Cc: Rich Felker 
Cc: Yoshinori Sato 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

sh: Support thread fault code encoding.

2012-05-14T05:57:28+00:00

This provides a simple interface modelled after sparc64/m32r to encode
the error code in the upper byte of thread_info for finer-grained
handling in the page fault path.

Signed-off-by: Paul Mundt

sh: Remove superfluous setup_frame_reg call

2010-02-08T01:47:11+00:00

There's no need to setup the frame pointer again in
call_handle_tlbmiss. The frame pointer will already have been setup in
handle_interrupt.

Signed-off-by: Matt Fleming 
Signed-off-by: Paul Mundt

sh: Setup frame pointer in handle_exception path

2010-02-08T01:46:53+00:00

In order to allow the DWARF unwinder to unwind through exceptions we
need to setup the frame pointer register (r14).

Signed-off-by: Matt Fleming 
Signed-off-by: Paul Mundt

sh: Disable SCIF2 on the SH-X3 proto CPU.

2009-10-18T06:13:28+00:00

SCIF2 and the FPU exceptions happen to share vector numbers, one in
EXPEVT and the other in INTEVT. This is a violation of the interface and
should have never made it in to silicon. On top of that, the demux hack
that was added for special dispatch is rather error prone, and introduces
more problems than it solves. Kill all of it off, and just refuse to deal
with SCIF2 outright.

Signed-off-by: Paul Mundt

sh: Don't enable interrupts in the page fault path

2009-09-28T06:11:45+00:00

There's already code in do_page_fault() to conditionally enable
interrupts, so we don't need to unconditonally enable them before
calling it. This fixes a lockdep warning where we called
trace_hardirqs_off() but with irqs still enabled.

Signed-off-by: Matt Fleming 
Signed-off-by: Paul Mundt

sh: Kill off kgdb's magical NMI debouncing.

2009-09-01T08:45:35+00:00

The kgdb stub has traditionally tied in to the NMI slot, and manually
handled debounce. Now that we have a generic way to do this instead, all
of the stub-specific debounce silliness can be killed off.

Signed-off-by: Paul Mundt

sh: nmi_debug support.

2009-09-01T08:38:32+00:00

This implements support for NMI debugging that was shamelessly copied
from the avr32 port. A bit of special magic is needed in the interrupt
exception path given that the NMI exception handler is stubbed in to the
regular exception handling table despite being reported in INTEVT. So we
mangle the lookup and kick off an EXPEVT-style exception dispatch from
the INTEVT path for exceptions that do_IRQ() has no chance of handling.
As a result, we also drop the evt2irq() conversion from the do_IRQ() path
and just do it in assembly.

Signed-off-by: Paul Mundt