Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / mips / kernel / irq-rm7000.c

diff --git a/kernel/arch/mips/kernel/irq-rm7000.c b/kernel/arch/mips/kernel/irq-rm7000.c
new file mode 100644 (file)
index 0000000..26f4e4c
--- /dev/null
+++ b/kernel/arch/mips/kernel/irq-rm7000.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2003 Ralf Baechle
+ *
+ * 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.
+ *
+ * Handler for RM7000 extended interrupts.  These are a non-standard
+ * feature so we handle them separately from standard interrupts.
+ */
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+
+#include <asm/irq_cpu.h>
+#include <asm/mipsregs.h>
+
+static inline void unmask_rm7k_irq(struct irq_data *d)
+{
+       set_c0_intcontrol(0x100 << (d->irq - RM7K_CPU_IRQ_BASE));
+}
+
+static inline void mask_rm7k_irq(struct irq_data *d)
+{
+       clear_c0_intcontrol(0x100 << (d->irq - RM7K_CPU_IRQ_BASE));
+}
+
+static struct irq_chip rm7k_irq_controller = {
+       .name = "RM7000",
+       .irq_ack = mask_rm7k_irq,
+       .irq_mask = mask_rm7k_irq,
+       .irq_mask_ack = mask_rm7k_irq,
+       .irq_unmask = unmask_rm7k_irq,
+       .irq_eoi = unmask_rm7k_irq
+};
+
+void __init rm7k_cpu_irq_init(void)
+{
+       int base = RM7K_CPU_IRQ_BASE;
+       int i;
+
+       clear_c0_intcontrol(0x00000f00);                /* Mask all */
+
+       for (i = base; i < base + 4; i++)
+               irq_set_chip_and_handler(i, &rm7k_irq_controller,
+                                        handle_percpu_irq);
+}