init android origin source code

1 files changed, 34 insertions, 0 deletions

diff --git a/ANDROID_3.4.5/arch/arm/mach-kirkwood/include/mach/entry-macro.S b/ANDROID_3.4.5/arch/arm/mach-kirkwood/include/mach/entry-macro.S
new file mode 100644
index 00000000..82db29f7
--- /dev/null
+++ b/ANDROID_3.4.5/arch/arm/mach-kirkwood/include/mach/entry-macro.S
@@ -0,0 +1,34 @@
+/*
+ * arch/arm/mach-kirkwood/include/mach/entry-macro.S
+ *
+ * Low-level IRQ helper macros for Marvell Kirkwood platforms
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <mach/bridge-regs.h>
+
+	.macro  get_irqnr_preamble, base, tmp
+	ldr	\base, =IRQ_VIRT_BASE
+	.endm
+
+	.macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
+	@ check low interrupts
+	ldr	\irqstat, [\base, #IRQ_CAUSE_LOW_OFF]
+	ldr	\tmp, [\base, #IRQ_MASK_LOW_OFF]
+	mov	\irqnr, #31
+	ands	\irqstat, \irqstat, \tmp
+	bne	1001f
+
+	@ if no low interrupts set, check high interrupts
+	ldr	\irqstat, [\base, #IRQ_CAUSE_HIGH_OFF]
+	ldr	\tmp, [\base, #IRQ_MASK_HIGH_OFF]
+	mov	\irqnr, #63
+	ands	\irqstat, \irqstat, \tmp
+
+	@ find first active interrupt source
+1001:	clzne	\irqstat, \irqstat
+	subne	\irqnr, \irqnr, \irqstat
+	.endm