MIPS: WRPPMC: Move code one directory level up.

It was the last platform under gt64120 and will fit better into the new
platform makefile scheme, if moved.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/wrppmc/irq.c

@@ -0,0 +1,56 @@
+/*
+ * irq.c: GT64120 Interrupt Controller
+ *
+ * Copyright (C) 2006, Wind River System Inc.
+ * Author: Rongkai.Zhan, <rongkai.zhan@windriver.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+#include <linux/hardirq.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+
+#include <asm/gt64120.h>
+#include <asm/irq_cpu.h>
+#include <asm/mipsregs.h>
+
+asmlinkage void plat_irq_dispatch(void)
+{
+	unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
+
+	if (pending & STATUSF_IP7)
+		do_IRQ(WRPPMC_MIPS_TIMER_IRQ);	/* CPU Compare/Count internal timer */
+	else if (pending & STATUSF_IP6)
+		do_IRQ(WRPPMC_UART16550_IRQ);	/* UART 16550 port */
+	else if (pending & STATUSF_IP3)
+		do_IRQ(WRPPMC_PCI_INTA_IRQ);	/* PCI INT_A */
+	else
+		spurious_interrupt();
+}
+
+/**
+ * Initialize GT64120 Interrupt Controller
+ */
+void gt64120_init_pic(void)
+{
+	/* clear CPU Interrupt Cause Registers */
+	GT_WRITE(GT_INTRCAUSE_OFS, (0x1F << 21));
+	GT_WRITE(GT_HINTRCAUSE_OFS, 0x00);
+
+	/* Disable all interrupts from GT64120 bridge chip */
+	GT_WRITE(GT_INTRMASK_OFS, 0x00);
+	GT_WRITE(GT_HINTRMASK_OFS, 0x00);
+	GT_WRITE(GT_PCI0_ICMASK_OFS, 0x00);
+	GT_WRITE(GT_PCI0_HICMASK_OFS, 0x00);
+}
+
+void __init arch_init_irq(void)
+{
+	/* IRQ 0 - 7 are for MIPS common irq_cpu controller */
+	mips_cpu_irq_init();
+
+	gt64120_init_pic();
+}