Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/mips/kernel/irq-rm7000.c b/arch/mips/kernel/irq-rm7000.c
new file mode 100644
index 0000000..f5d779f
--- /dev/null
+++ b/arch/mips/kernel/irq-rm7000.c
@@ -0,0 +1,98 @@
+/*
+ * 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/kernel.h>
+
+#include <asm/irq_cpu.h>
+#include <asm/mipsregs.h>
+#include <asm/system.h>
+
+static int irq_base;
+
+static inline void unmask_rm7k_irq(unsigned int irq)
+{
+ set_c0_intcontrol(0x100 << (irq - irq_base));
+}
+
+static inline void mask_rm7k_irq(unsigned int irq)
+{
+ clear_c0_intcontrol(0x100 << (irq - irq_base));
+}
+
+static inline void rm7k_cpu_irq_enable(unsigned int irq)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ unmask_rm7k_irq(irq);
+ local_irq_restore(flags);
+}
+
+static void rm7k_cpu_irq_disable(unsigned int irq)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ mask_rm7k_irq(irq);
+ local_irq_restore(flags);
+}
+
+static unsigned int rm7k_cpu_irq_startup(unsigned int irq)
+{
+ rm7k_cpu_irq_enable(irq);
+
+ return 0;
+}
+
+#define rm7k_cpu_irq_shutdown rm7k_cpu_irq_disable
+
+/*
+ * While we ack the interrupt interrupts are disabled and thus we don't need
+ * to deal with concurrency issues. Same for rm7k_cpu_irq_end.
+ */
+static void rm7k_cpu_irq_ack(unsigned int irq)
+{
+ mask_rm7k_irq(irq);
+}
+
+static void rm7k_cpu_irq_end(unsigned int irq)
+{
+ if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
+ unmask_rm7k_irq(irq);
+}
+
+static hw_irq_controller rm7k_irq_controller = {
+ "RM7000",
+ rm7k_cpu_irq_startup,
+ rm7k_cpu_irq_shutdown,
+ rm7k_cpu_irq_enable,
+ rm7k_cpu_irq_disable,
+ rm7k_cpu_irq_ack,
+ rm7k_cpu_irq_end,
+};
+
+void __init rm7k_cpu_irq_init(int base)
+{
+ int i;
+
+ clear_c0_intcontrol(0x00000f00); /* Mask all */
+
+ for (i = base; i < base + 4; i++) {
+ irq_desc[i].status = IRQ_DISABLED;
+ irq_desc[i].action = NULL;
+ irq_desc[i].depth = 1;
+ irq_desc[i].handler = &rm7k_irq_controller;
+ }
+
+ irq_base = base;
+}