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-rw-r--r--kernel/arch/arm/mach-ixp4xx/include/mach/entry-macro.S41
1 files changed, 41 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-ixp4xx/include/mach/entry-macro.S b/kernel/arch/arm/mach-ixp4xx/include/mach/entry-macro.S
new file mode 100644
index 000000000..79adf83e2
--- /dev/null
+++ b/kernel/arch/arm/mach-ixp4xx/include/mach/entry-macro.S
@@ -0,0 +1,41 @@
+/*
+ * arch/arm/mach-ixp4xx/include/mach/entry-macro.S
+ *
+ * Low-level IRQ helper macros for IXP4xx-based 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/hardware.h>
+
+ .macro get_irqnr_preamble, base, tmp
+ .endm
+
+ .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
+ ldr \irqstat, =(IXP4XX_INTC_BASE_VIRT+IXP4XX_ICIP_OFFSET)
+ ldr \irqstat, [\irqstat] @ get interrupts
+ cmp \irqstat, #0
+ beq 1001f @ upper IRQ?
+ clz \irqnr, \irqstat
+ mov \base, #31
+ sub \irqnr, \base, \irqnr
+ b 1002f @ lower IRQ being
+ @ handled
+
+1001:
+ /*
+ * IXP465/IXP435 has an upper IRQ status register
+ */
+#if defined(CONFIG_CPU_IXP46X) || defined(CONFIG_CPU_IXP43X)
+ ldr \irqstat, =(IXP4XX_INTC_BASE_VIRT+IXP4XX_ICIP2_OFFSET)
+ ldr \irqstat, [\irqstat] @ get upper interrupts
+ mov \irqnr, #63
+ clz \irqstat, \irqstat
+ cmp \irqstat, #32
+ subne \irqnr, \irqnr, \irqstat
+#endif
+1002:
+ .endm
+
+