From: Magnus Damm <magnus.damm@gmail.com>
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 00/02][RFC] ARM: Subarch IRQ handler macro support
Date: Fri, 10 Dec 2010 05:58:35 +0000 [thread overview]
Message-ID: <20101210055835.8635.98614.sendpatchset@t400s> (raw)
ARM: Subarch IRQ handler macro support
[PATCH 01/02][RFC] ARM: Introduce Subarch IRQ handler macros
[PATCH 02/02][RFC] ARM: shmobile: Use Subarch IRQ handler for INTC
These patches add a macro for per-subarch use together with some
example code that shows how to use it.
The first patch simply breaks out code from the irq_handler macro
in entry-armv.S to the new macro arch_irq_handler that is put in a
shared header file. The new header file also adds the new macro
arch_irq_handler_default which replaces previous code in the
entry-armv.S file.
Patch number two gives an example on how to make use of the macro
arch_irq_handler on the SH-Mobile ARM subarch. Compile-time tested
on top of RMKs devel tree with the CONFIG_MULTI_IRQ_HANDLER patch
by Eric Miao. Please note that this patch isn't suitable for merge
since it needs to be reworked to fit on the sh-2.6 tree where the
rest of the SH-Mobile changes are.
In short, the per-subarch code is reduced to the following on the
sh7372 uniprocessor:
+#include <asm/entry-macro-multi.S>
+
+#define INTFLGA 0xe6980018
+
+ .macro get_irqnr_preamble, base, tmp
+ ldr \base, =INTFLGA
+ .endm
+
+ .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
+ ldr \irqnr, [\base]
+ cmp \irqnr, #0
+ beq 1000f
+ /* intevt to irq number */
+ lsr \irqnr, \irqnr, #0x5
+ subs \irqnr, \irqnr, #16
+1000:
+ .endm
+
+ arch_irq_handler shmobile_handle_irq_intc
This code depends on the following patch by Eric Miao:
[PATCH] ARM: Allow machine to specify it's own IRQ handlers at run-time
Comments are more than welcome!
Signed-off-by: Magnus Damm <damm@opensource.se>
---
arch/arm/include/asm/entry-macro-multi.S | 43 +++++++++++++++++++++
arch/arm/kernel/entry-armv.S | 31 ---------------
arch/arm/mach-shmobile/Kconfig | 3 +
arch/arm/mach-shmobile/Makefile | 12 ++++-
arch/arm/mach-shmobile/board-ap4evb.c | 1
arch/arm/mach-shmobile/board-g3evm.c | 1
arch/arm/mach-shmobile/board-g4evm.c | 1
arch/arm/mach-shmobile/entry-intc.S | 30 ++++++++++++++
arch/arm/mach-shmobile/include/mach/common.h | 1
arch/arm/mach-shmobile/include/mach/entry-macro.S | 27 -------------
arch/arm/mach-shmobile/include/mach/hardware.h | 3 -
11 files changed, 91 insertions(+), 62 deletions(-)
WARNING: multiple messages have this Message-ID (diff)
From: magnus.damm@gmail.com (Magnus Damm)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 00/02][RFC] ARM: Subarch IRQ handler macro support
Date: Fri, 10 Dec 2010 14:58:35 +0900 [thread overview]
Message-ID: <20101210055835.8635.98614.sendpatchset@t400s> (raw)
ARM: Subarch IRQ handler macro support
[PATCH 01/02][RFC] ARM: Introduce Subarch IRQ handler macros
[PATCH 02/02][RFC] ARM: shmobile: Use Subarch IRQ handler for INTC
These patches add a macro for per-subarch use together with some
example code that shows how to use it.
The first patch simply breaks out code from the irq_handler macro
in entry-armv.S to the new macro arch_irq_handler that is put in a
shared header file. The new header file also adds the new macro
arch_irq_handler_default which replaces previous code in the
entry-armv.S file.
Patch number two gives an example on how to make use of the macro
arch_irq_handler on the SH-Mobile ARM subarch. Compile-time tested
on top of RMKs devel tree with the CONFIG_MULTI_IRQ_HANDLER patch
by Eric Miao. Please note that this patch isn't suitable for merge
since it needs to be reworked to fit on the sh-2.6 tree where the
rest of the SH-Mobile changes are.
In short, the per-subarch code is reduced to the following on the
sh7372 uniprocessor:
+#include <asm/entry-macro-multi.S>
+
+#define INTFLGA 0xe6980018
+
+ .macro get_irqnr_preamble, base, tmp
+ ldr \base, =INTFLGA
+ .endm
+
+ .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
+ ldr \irqnr, [\base]
+ cmp \irqnr, #0
+ beq 1000f
+ /* intevt to irq number */
+ lsr \irqnr, \irqnr, #0x5
+ subs \irqnr, \irqnr, #16
+1000:
+ .endm
+
+ arch_irq_handler shmobile_handle_irq_intc
This code depends on the following patch by Eric Miao:
[PATCH] ARM: Allow machine to specify it's own IRQ handlers at run-time
Comments are more than welcome!
Signed-off-by: Magnus Damm <damm@opensource.se>
---
arch/arm/include/asm/entry-macro-multi.S | 43 +++++++++++++++++++++
arch/arm/kernel/entry-armv.S | 31 ---------------
arch/arm/mach-shmobile/Kconfig | 3 +
arch/arm/mach-shmobile/Makefile | 12 ++++-
arch/arm/mach-shmobile/board-ap4evb.c | 1
arch/arm/mach-shmobile/board-g3evm.c | 1
arch/arm/mach-shmobile/board-g4evm.c | 1
arch/arm/mach-shmobile/entry-intc.S | 30 ++++++++++++++
arch/arm/mach-shmobile/include/mach/common.h | 1
arch/arm/mach-shmobile/include/mach/entry-macro.S | 27 -------------
arch/arm/mach-shmobile/include/mach/hardware.h | 3 -
11 files changed, 91 insertions(+), 62 deletions(-)
next reply other threads:[~2010-12-10 5:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-10 5:58 Magnus Damm [this message]
2010-12-10 5:58 ` [PATCH 00/02][RFC] ARM: Subarch IRQ handler macro support Magnus Damm
2010-12-10 5:58 ` [PATCH 01/02][RFC] ARM: Introduce Subarch IRQ handler macros Magnus Damm
2010-12-10 5:58 ` Magnus Damm
2010-12-10 5:58 ` [PATCH 02/02][RFC] ARM: shmobile: Use Subarch IRQ handler for INTC Magnus Damm
2010-12-10 5:58 ` Magnus Damm
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