m68k: merge m68k and m68knommu arch directories

There is a lot of common code that could be shared between the m68k
and m68knommu arch branches. It makes sense to merge the two branches
into a single directory structure so that we can more easily share
that common code.

This is a brute force merge, based on a script from Stephen King
<sfking@fdwdc.com>, which was originally written by Arnd Bergmann
<arnd@arndb.de>.

> The script was inspired by the script Sam Ravnborg used to merge the
> includes from m68knommu. For those files common to both arches but
> differing in content, the m68k version of the file is renamed to
> <file>_mm.<ext> and the m68knommu version of the file is moved into the
> corresponding m68k directory and renamed <file>_no.<ext> and a small
> wrapper file <file>.<ext> is used to select between the two version. Files
> that are common to both but don't differ are removed from the m68knommu
> tree and files and directories that are unique to the m68knommu tree are
> moved to the m68k tree. Finally, the arch/m68knommu tree is removed.
>
> To select between the the versions of the files, the wrapper uses
>
> #ifdef CONFIG_MMU
> #include <file>_mm.<ext>
> #else
> #include <file>_no.<ext>
> #endif

On top of this file merge I have done a simplistic merge of m68k and
m68knommu Kconfig, which primarily attempts to keep existing options and
menus in place. Other than a handful of options being moved it produces
identical .config outputs on m68k and m68knommu targets I tested it on.

With this in place there is now quite a bit of scope for merge cleanups
in future patches.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>

1 files changed, 61 insertions, 0 deletions

diff --git a/arch/m68k/platform/5249/intc2.c b/arch/m68k/platform/5249/intc2.c
new file mode 100644
index 000000000000..8f4b63e17366
--- /dev/null
+++ b/arch/m68k/platform/5249/intc2.c
@@ -0,0 +1,61 @@
+/*
+ * intc2.c  -- support for the 2nd INTC controller of the 5249
+ *
+ * (C) Copyright 2009, Greg Ungerer <gerg@snapgear.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <asm/coldfire.h>
+#include <asm/mcfsim.h>
+
+static void intc2_irq_gpio_mask(struct irq_data *d)
+{
+        u32 imr;
+        imr = readl(MCF_MBAR2 + MCFSIM2_GPIOINTENABLE);
+        imr &= ~(0x1 << (d->irq - MCFINTC2_GPIOIRQ0));
+        writel(imr, MCF_MBAR2 + MCFSIM2_GPIOINTENABLE);
+}
+
+static void intc2_irq_gpio_unmask(struct irq_data *d)
+{
+        u32 imr;
+        imr = readl(MCF_MBAR2 + MCFSIM2_GPIOINTENABLE);
+        imr |= (0x1 << (d->irq - MCFINTC2_GPIOIRQ0));
+        writel(imr, MCF_MBAR2 + MCFSIM2_GPIOINTENABLE);
+}
+
+static void intc2_irq_gpio_ack(struct irq_data *d)
+{
+        writel(0x1 << (d->irq - MCFINTC2_GPIOIRQ0), MCF_MBAR2 + MCFSIM2_GPIOINTCLEAR);
+}
+
+static struct irq_chip intc2_irq_gpio_chip = {
+        .name           = "CF-INTC2",
+        .irq_mask       = intc2_irq_gpio_mask,
+        .irq_unmask     = intc2_irq_gpio_unmask,
+        .irq_ack        = intc2_irq_gpio_ack,
+};
+
+static int __init mcf_intc2_init(void)
+{
+        int irq;
+
+        /* GPIO interrupt sources */
+        for (irq = MCFINTC2_GPIOIRQ0; (irq <= MCFINTC2_GPIOIRQ7); irq++) {
+                set_irq_chip(irq, &intc2_irq_gpio_chip);
+                set_irq_handler(irq, handle_edge_irq);
+        }
+
+        return 0;
+}
+
+arch_initcall(mcf_intc2_init);