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/renesas/systemh/irq.c b/arch/sh/boards/renesas/systemh/irq.c
new file mode 100644
index 0000000..5675a41
--- /dev/null
+++ b/arch/sh/boards/renesas/systemh/irq.c
@@ -0,0 +1,111 @@
+/*
+ * linux/arch/sh/boards/systemh/irq.c
+ *
+ * Copyright (C) 2000 Kazumoto Kojima
+ *
+ * Hitachi SystemH Support.
+ *
+ * Modified for 7751 SystemH by
+ * Jonathan Short.
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+
+#include <linux/hdreg.h>
+#include <linux/ide.h>
+#include <asm/io.h>
+#include <asm/mach/7751systemh.h>
+#include <asm/smc37c93x.h>
+
+/* address of external interrupt mask register
+ * address must be set prior to use these (maybe in init_XXX_irq())
+ * XXX : is it better to use .config than specifying it in code? */
+static unsigned long *systemh_irq_mask_register = (unsigned long *)0xB3F10004;
+static unsigned long *systemh_irq_request_register = (unsigned long *)0xB3F10000;
+
+/* forward declaration */
+static unsigned int startup_systemh_irq(unsigned int irq);
+static void shutdown_systemh_irq(unsigned int irq);
+static void enable_systemh_irq(unsigned int irq);
+static void disable_systemh_irq(unsigned int irq);
+static void mask_and_ack_systemh(unsigned int);
+static void end_systemh_irq(unsigned int irq);
+
+/* hw_interrupt_type */
+static struct hw_interrupt_type systemh_irq_type = {
+ " SystemH Register",
+ startup_systemh_irq,
+ shutdown_systemh_irq,
+ enable_systemh_irq,
+ disable_systemh_irq,
+ mask_and_ack_systemh,
+ end_systemh_irq
+};
+
+static unsigned int startup_systemh_irq(unsigned int irq)
+{
+ enable_systemh_irq(irq);
+ return 0; /* never anything pending */
+}
+
+static void shutdown_systemh_irq(unsigned int irq)
+{
+ disable_systemh_irq(irq);
+}
+
+static void disable_systemh_irq(unsigned int irq)
+{
+ if (systemh_irq_mask_register) {
+ unsigned long flags;
+ unsigned long val, mask = 0x01 << 1;
+
+ /* Clear the "irq"th bit in the mask and set it in the request */
+ local_irq_save(flags);
+
+ val = ctrl_inl((unsigned long)systemh_irq_mask_register);
+ val &= ~mask;
+ ctrl_outl(val, (unsigned long)systemh_irq_mask_register);
+
+ val = ctrl_inl((unsigned long)systemh_irq_request_register);
+ val |= mask;
+ ctrl_outl(val, (unsigned long)systemh_irq_request_register);
+
+ local_irq_restore(flags);
+ }
+}
+
+static void enable_systemh_irq(unsigned int irq)
+{
+ if (systemh_irq_mask_register) {
+ unsigned long flags;
+ unsigned long val, mask = 0x01 << 1;
+
+ /* Set "irq"th bit in the mask register */
+ local_irq_save(flags);
+ val = ctrl_inl((unsigned long)systemh_irq_mask_register);
+ val |= mask;
+ ctrl_outl(val, (unsigned long)systemh_irq_mask_register);
+ local_irq_restore(flags);
+ }
+}
+
+static void mask_and_ack_systemh(unsigned int irq)
+{
+ disable_systemh_irq(irq);
+}
+
+static void end_systemh_irq(unsigned int irq)
+{
+ if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
+ enable_systemh_irq(irq);
+}
+
+void make_systemh_irq(unsigned int irq)
+{
+ disable_irq_nosync(irq);
+ irq_desc[irq].handler = &systemh_irq_type;
+ disable_systemh_irq(irq);
+}
+