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/arm26/machine/irq.c b/arch/arm26/machine/irq.c
new file mode 100644
index 0000000..4361863
--- /dev/null
+++ b/arch/arm26/machine/irq.c
@@ -0,0 +1,165 @@
+/*
+ * linux/arch/arm26/mach-arc/irq.c
+ *
+ * Copyright (C) 1996 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Changelog:
+ * 24-09-1996 RMK Created
+ * 10-10-1996 RMK Brought up to date with arch-sa110eval
+ * 22-10-1996 RMK Changed interrupt numbers & uses new inb/outb macros
+ * 11-01-1998 RMK Added mask_and_ack_irq
+ * 22-08-1998 RMK Restructured IRQ routines
+ * 08-09-2002 IM Brought up to date for 2.5
+ * 01-06-2003 JMA Removed arc_fiq_chip
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+
+#include <asm/irq.h>
+#include <asm/irqchip.h>
+#include <asm/ioc.h>
+#include <asm/io.h>
+#include <asm/system.h>
+
+extern void init_FIQ(void);
+
+#define a_clf() clf()
+#define a_stf() stf()
+
+static void arc_ack_irq_a(unsigned int irq)
+{
+ unsigned int val, mask;
+
+ mask = 1 << irq;
+ a_clf();
+ val = ioc_readb(IOC_IRQMASKA);
+ ioc_writeb(val & ~mask, IOC_IRQMASKA);
+ ioc_writeb(mask, IOC_IRQCLRA);
+ a_stf();
+}
+
+static void arc_mask_irq_a(unsigned int irq)
+{
+ unsigned int val, mask;
+
+ mask = 1 << irq;
+ a_clf();
+ val = ioc_readb(IOC_IRQMASKA);
+ ioc_writeb(val & ~mask, IOC_IRQMASKA);
+ a_stf();
+}
+
+static void arc_unmask_irq_a(unsigned int irq)
+{
+ unsigned int val, mask;
+
+ mask = 1 << irq;
+ a_clf();
+ val = ioc_readb(IOC_IRQMASKA);
+ ioc_writeb(val | mask, IOC_IRQMASKA);
+ a_stf();
+}
+
+static struct irqchip arc_a_chip = {
+ .ack = arc_ack_irq_a,
+ .mask = arc_mask_irq_a,
+ .unmask = arc_unmask_irq_a,
+};
+
+static void arc_mask_irq_b(unsigned int irq)
+{
+ unsigned int val, mask;
+ mask = 1 << (irq & 7);
+ val = ioc_readb(IOC_IRQMASKB);
+ ioc_writeb(val & ~mask, IOC_IRQMASKB);
+}
+
+static void arc_unmask_irq_b(unsigned int irq)
+{
+ unsigned int val, mask;
+
+ mask = 1 << (irq & 7);
+ val = ioc_readb(IOC_IRQMASKB);
+ ioc_writeb(val | mask, IOC_IRQMASKB);
+}
+
+static struct irqchip arc_b_chip = {
+ .ack = arc_mask_irq_b,
+ .mask = arc_mask_irq_b,
+ .unmask = arc_unmask_irq_b,
+};
+
+/* FIXME - JMA none of these functions are used in arm26 currently
+static void arc_mask_irq_fiq(unsigned int irq)
+{
+ unsigned int val, mask;
+
+ mask = 1 << (irq & 7);
+ val = ioc_readb(IOC_FIQMASK);
+ ioc_writeb(val & ~mask, IOC_FIQMASK);
+}
+
+static void arc_unmask_irq_fiq(unsigned int irq)
+{
+ unsigned int val, mask;
+
+ mask = 1 << (irq & 7);
+ val = ioc_readb(IOC_FIQMASK);
+ ioc_writeb(val | mask, IOC_FIQMASK);
+}
+
+static struct irqchip arc_fiq_chip = {
+ .ack = arc_mask_irq_fiq,
+ .mask = arc_mask_irq_fiq,
+ .unmask = arc_unmask_irq_fiq,
+};
+*/
+
+void __init arc_init_irq(void)
+{
+ unsigned int irq, flags;
+
+ /* Disable all IOC interrupt sources */
+ ioc_writeb(0, IOC_IRQMASKA);
+ ioc_writeb(0, IOC_IRQMASKB);
+ ioc_writeb(0, IOC_FIQMASK);
+
+ for (irq = 0; irq < NR_IRQS; irq++) {
+ flags = IRQF_VALID;
+
+ if (irq <= 6 || (irq >= 9 && irq <= 15))
+ flags |= IRQF_PROBE;
+
+ if (irq == IRQ_KEYBOARDTX)
+ flags |= IRQF_NOAUTOEN;
+
+ switch (irq) {
+ case 0 ... 7:
+ set_irq_chip(irq, &arc_a_chip);
+ set_irq_handler(irq, do_level_IRQ);
+ set_irq_flags(irq, flags);
+ break;
+
+ case 8 ... 15:
+ set_irq_chip(irq, &arc_b_chip);
+ set_irq_handler(irq, do_level_IRQ);
+ set_irq_flags(irq, flags);
+
+/* case 64 ... 72:
+ set_irq_chip(irq, &arc_fiq_chip);
+ set_irq_flags(irq, flags);
+ break;
+*/
+
+ }
+ }
+
+ irq_desc[IRQ_KEYBOARDTX].noautoenable = 1;
+
+ init_FIQ();
+}
+
