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-rw-r--r--kernel/arch/arm/mach-ebsa110/include/mach/entry-macro.S33
1 files changed, 33 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-ebsa110/include/mach/entry-macro.S b/kernel/arch/arm/mach-ebsa110/include/mach/entry-macro.S
new file mode 100644
index 000000000..14b110de7
--- /dev/null
+++ b/kernel/arch/arm/mach-ebsa110/include/mach/entry-macro.S
@@ -0,0 +1,33 @@
+/*
+ * arch/arm/mach-ebsa110/include/mach/entry-macro.S
+ *
+ * Low-level IRQ helper macros for ebsa110 platform.
+ *
+ * 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.
+ */
+
+
+
+#define IRQ_STAT 0xff000000 /* read */
+
+ .macro get_irqnr_preamble, base, tmp
+ mov \base, #IRQ_STAT
+ .endm
+
+ .macro get_irqnr_and_base, irqnr, stat, base, tmp
+ ldrb \stat, [\base] @ get interrupts
+ mov \irqnr, #0
+ tst \stat, #15
+ addeq \irqnr, \irqnr, #4
+ moveq \stat, \stat, lsr #4
+ tst \stat, #3
+ addeq \irqnr, \irqnr, #2
+ moveq \stat, \stat, lsr #2
+ tst \stat, #1
+ addeq \irqnr, \irqnr, #1
+ moveq \stat, \stat, lsr #1
+ tst \stat, #1 @ bit 0 should be set
+ .endm
+