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/sh/boards/saturn/irq.c b/arch/sh/boards/saturn/irq.c
new file mode 100644
index 0000000..15d1d3f
--- /dev/null
+++ b/arch/sh/boards/saturn/irq.c
@@ -0,0 +1,118 @@
+/*
+ * arch/sh/boards/saturn/irq.c
+ *
+ * Copyright (C) 2002 Paul Mundt
+ *
+ * Released under the terms of the GNU GPL v2.0.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+
+/*
+ * Interrupts map out as follows:
+ *
+ * Vector Name Mask
+ *
+ * 64 VBLANKIN 0x0001
+ * 65 VBLANKOUT 0x0002
+ * 66 HBLANKIN 0x0004
+ * 67 TIMER0 0x0008
+ * 68 TIMER1 0x0010
+ * 69 DSPEND 0x0020
+ * 70 SOUNDREQUEST 0x0040
+ * 71 SYSTEMMANAGER 0x0080
+ * 72 PAD 0x0100
+ * 73 LEVEL2DMAEND 0x0200
+ * 74 LEVEL1DMAEND 0x0400
+ * 75 LEVEL0DMAEND 0x0800
+ * 76 DMAILLEGAL 0x1000
+ * 77 SRITEDRAWEND 0x2000
+ * 78 ABUS 0x8000
+ *
+ */
+#define SATURN_IRQ_MIN 64 /* VBLANKIN */
+#define SATURN_IRQ_MAX 78 /* ABUS */
+
+#define SATURN_IRQ_MASK 0xbfff
+
+static inline u32 saturn_irq_mask(unsigned int irq_nr)
+{
+ u32 mask;
+
+ mask = (1 << (irq_nr - SATURN_IRQ_MIN));
+ mask <<= (irq_nr == SATURN_IRQ_MAX);
+ mask &= SATURN_IRQ_MASK;
+
+ return mask;
+}
+
+static inline void mask_saturn_irq(unsigned int irq_nr)
+{
+ u32 mask;
+
+ mask = ctrl_inl(SATURN_IMR);
+ mask |= saturn_irq_mask(irq_nr);
+ ctrl_outl(mask, SATURN_IMR);
+}
+
+static inline void unmask_saturn_irq(unsigned int irq_nr)
+{
+ u32 mask;
+
+ mask = ctrl_inl(SATURN_IMR);
+ mask &= ~saturn_irq_mask(irq_nr);
+ ctrl_outl(mask, SATURN_IMR);
+}
+
+static void disable_saturn_irq(unsigned int irq_nr)
+{
+ mask_saturn_irq(irq_nr);
+}
+
+static void enable_saturn_irq(unsigned int irq_nr)
+{
+ unmask_saturn_irq(irq_nr);
+}
+
+static void mask_and_ack_saturn_irq(unsigned int irq_nr)
+{
+ mask_saturn_irq(irq_nr);
+}
+
+static void end_saturn_irq(unsigned int irq_nr)
+{
+ if (!(irq_desc[irq_nr].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
+ unmask_saturn_irq(irq_nr);
+}
+
+static unsigned int startup_saturn_irq(unsigned int irq_nr)
+{
+ unmask_saturn_irq(irq_nr);
+
+ return 0;
+}
+
+static void shutdown_saturn_irq(unsigned int irq_nr)
+{
+ mask_saturn_irq(irq_nr);
+}
+
+static struct hw_interrupt_type saturn_int = {
+ .typename = "Saturn",
+ .enable = enable_saturn_irq,
+ .disable = disable_saturn_irq,
+ .ack = mask_and_ack_saturn_irq,
+ .end = end_saturn_irq,
+ .startup = startup_saturn_irq,
+ .shutdown = shutdown_saturn_irq,
+};
+
+int saturn_irq_demux(int irq_nr)
+{
+ /* FIXME */
+ return irq_nr;
+}
+