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ARM: 6538/1: Subarch IRQ handler macros V3

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Per subarch interrupt handler macros V3.

This patch breaks out code from the irq_handler macro
into arch_irq_handler and arch_irq_handler_default.

The macros are put in the header file "entry-macro-multi.S"

The arch_irq_handler_default macro is designed to be
used by irq_handler in entry-armv.S while arch_irq_handler
is suitable for per-subarch use.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Magnus Damm 2010-12-22 13:20:08 +01:00 committed by Russell King
parent 521086412e
commit cd544ce754
2 changed files with 46 additions and 29 deletions
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44
arch/arm/include/asm/entry-macro-multi.S Normal file
View file

@ -0,0 +1,44 @@
/*
* Interrupt handling. Preserves r7, r8, r9
*/
.macro arch_irq_handler_default
get_irqnr_preamble r5, lr
1: get_irqnr_and_base r0, r6, r5, lr
movne r1, sp
@
@ routine called with r0 = irq number, r1 = struct pt_regs *
@
adrne lr, BSYM(1b)
bne asm_do_IRQ
#ifdef CONFIG_SMP
/*
* XXX
*
* this macro assumes that irqstat (r6) and base (r5) are
* preserved from get_irqnr_and_base above
*/
ALT_SMP(test_for_ipi r0, r6, r5, lr)
ALT_UP_B(9997f)
movne r0, sp
adrne lr, BSYM(1b)
bne do_IPI
#ifdef CONFIG_LOCAL_TIMERS
test_for_ltirq r0, r6, r5, lr
movne r0, sp
adrne lr, BSYM(1b)
bne do_local_timer
#endif
#endif
9997:
.endm
.macro arch_irq_handler, symbol_name
.align 5
.global \symbol_name
\symbol_name:
mov r4, lr
arch_irq_handler_default
mov pc, r4
.endm

31
arch/arm/kernel/entry-armv.S
View file

@ -25,6 +25,7 @@
#include <asm/tls.h>
#include "entry-header.S"
#include <asm/entry-macro-multi.S>
/*
* Interrupt handling. Preserves r7, r8, r9
@ -38,35 +39,7 @@
teq r5, #0
movne pc, r5
#endif
get_irqnr_preamble r5, lr
1: get_irqnr_and_base r0, r6, r5, lr
movne r1, sp
@
@ routine called with r0 = irq number, r1 = struct pt_regs *
@
adrne lr, BSYM(1b)
bne asm_do_IRQ
#ifdef CONFIG_SMP
/*
* XXX
*
* this macro assumes that irqstat (r6) and base (r5) are
* preserved from get_irqnr_and_base above
*/
ALT_SMP(test_for_ipi r0, r6, r5, lr)
ALT_UP_B(9997f)
movne r0, sp
adrne lr, BSYM(1b)
bne do_IPI
#ifdef CONFIG_LOCAL_TIMERS
test_for_ltirq r0, r6, r5, lr
movne r0, sp
adrne lr, BSYM(1b)
bne do_local_timer
#endif
#endif
arch_irq_handler_default
9997:
.endm