[PATCH] ARM: 2829/1: S3C2410 - split s3c2440 irq specifics from core irq.c

Patch from Ben Dooks

Remove the need for the #ifdefs and place the IRQ handling code for
the s3c2440 into a new file, which is only compiled when the
s3c2440 cpu support is enabled.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 99 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c2410/irq.h b/arch/arm/mach-s3c2410/irq.h
new file mode 100644
index 000000000000..4abf0ca14e00
--- /dev/null
+++ b/arch/arm/mach-s3c2410/irq.h
@@ -0,0 +1,99 @@
+/* arch/arm/mach-s3c2410/irq.h
+ *
+ * Copyright (c) 2004-2005 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *
+ * Header file for S3C24XX CPU IRQ support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Modifications:
+*/
+
+#define irqdbf(x...)
+#define irqdbf2(x...)
+
+#define EXTINT_OFF (IRQ_EINT4 - 4)
+
+extern struct irqchip s3c_irq_level_chip;
+
+static inline void
+s3c_irqsub_mask(unsigned int irqno, unsigned int parentbit,
+                int subcheck)
+{
+        unsigned long mask;
+        unsigned long submask;
+
+        submask = __raw_readl(S3C2410_INTSUBMSK);
+        mask = __raw_readl(S3C2410_INTMSK);
+
+        submask |= (1UL << (irqno - IRQ_S3CUART_RX0));
+
+        /* check to see if we need to mask the parent IRQ */
+
+        if ((submask  & subcheck) == subcheck) {
+                __raw_writel(mask | parentbit, S3C2410_INTMSK);
+        }
+
+        /* write back masks */
+        __raw_writel(submask, S3C2410_INTSUBMSK);
+
+}
+
+static inline void
+s3c_irqsub_unmask(unsigned int irqno, unsigned int parentbit)
+{
+        unsigned long mask;
+        unsigned long submask;
+
+        submask = __raw_readl(S3C2410_INTSUBMSK);
+        mask = __raw_readl(S3C2410_INTMSK);
+
+        submask &= ~(1UL << (irqno - IRQ_S3CUART_RX0));
+        mask &= ~parentbit;
+
+        /* write back masks */
+        __raw_writel(submask, S3C2410_INTSUBMSK);
+        __raw_writel(mask, S3C2410_INTMSK);
+}
+
+
+static inline void
+s3c_irqsub_maskack(unsigned int irqno, unsigned int parentmask, unsigned int group)
+{
+        unsigned int bit = 1UL << (irqno - IRQ_S3CUART_RX0);
+
+        s3c_irqsub_mask(irqno, parentmask, group);
+
+        __raw_writel(bit, S3C2410_SUBSRCPND);
+
+        /* only ack parent if we've got all the irqs (seems we must
+         * ack, all and hope that the irq system retriggers ok when
+         * the interrupt goes off again)
+         */
+
+        if (1) {
+                __raw_writel(parentmask, S3C2410_SRCPND);
+                __raw_writel(parentmask, S3C2410_INTPND);
+        }
+}
+
+static inline void
+s3c_irqsub_ack(unsigned int irqno, unsigned int parentmask, unsigned int group)
+{
+        unsigned int bit = 1UL << (irqno - IRQ_S3CUART_RX0);
+
+        __raw_writel(bit, S3C2410_SUBSRCPND);
+
+        /* only ack parent if we've got all the irqs (seems we must
+         * ack, all and hope that the irq system retriggers ok when
+         * the interrupt goes off again)
+         */
+
+        if (1) {
+                __raw_writel(parentmask, S3C2410_SRCPND);
+                __raw_writel(parentmask, S3C2410_INTPND);
+        }
+}