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authorMagnus Damm <damm@opensource.se>2010-12-22 15:20:08 +0300
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-12-24 12:47:36 +0300
commitcd544ce754ac2432ffcc0626ea802d2b30876b50 (patch)
treec1c678191e34ffb3c5bae173579191992ae530aa /arch/arm/include/asm/entry-macro-multi.S
parent521086412ee423fbdfc7da81f257239c43f707b4 (diff)
downloadlinux-cd544ce754ac2432ffcc0626ea802d2b30876b50.tar.xz
ARM: 6538/1: Subarch IRQ handler macros V3
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>
Diffstat (limited to 'arch/arm/include/asm/entry-macro-multi.S')
-rw-r--r--arch/arm/include/asm/entry-macro-multi.S44
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/arm/include/asm/entry-macro-multi.S b/arch/arm/include/asm/entry-macro-multi.S
new file mode 100644
index 000000000000..44f21d4584e8
--- /dev/null
+++ b/arch/arm/include/asm/entry-macro-multi.S
@@ -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