Initial import of modified Linux 2.6.28 tree

Original upstream URL:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y

1 files changed, 111 insertions, 0 deletions

diff --git a/arch/mips/dec/ioasic-irq.c b/arch/mips/dec/ioasic-irq.c
new file mode 100644
index 0000000..3acb133
--- /dev/null
+++ b/arch/mips/dec/ioasic-irq.c
@@ -0,0 +1,111 @@
+/*
+ *	linux/arch/mips/dec/ioasic-irq.c
+ *
+ *	DEC I/O ASIC interrupts.
+ *
+ *	Copyright (c) 2002, 2003  Maciej W. Rozycki
+ *
+ *	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.
+ */
+
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/types.h>
+
+#include <asm/dec/ioasic.h>
+#include <asm/dec/ioasic_addrs.h>
+#include <asm/dec/ioasic_ints.h>
+
+
+static int ioasic_irq_base;
+
+
+static inline void unmask_ioasic_irq(unsigned int irq)
+{
+	u32 simr;
+
+	simr = ioasic_read(IO_REG_SIMR);
+	simr |= (1 << (irq - ioasic_irq_base));
+	ioasic_write(IO_REG_SIMR, simr);
+}
+
+static inline void mask_ioasic_irq(unsigned int irq)
+{
+	u32 simr;
+
+	simr = ioasic_read(IO_REG_SIMR);
+	simr &= ~(1 << (irq - ioasic_irq_base));
+	ioasic_write(IO_REG_SIMR, simr);
+}
+
+static inline void clear_ioasic_irq(unsigned int irq)
+{
+	u32 sir;
+
+	sir = ~(1 << (irq - ioasic_irq_base));
+	ioasic_write(IO_REG_SIR, sir);
+}
+
+static inline void ack_ioasic_irq(unsigned int irq)
+{
+	mask_ioasic_irq(irq);
+	fast_iob();
+}
+
+static inline void end_ioasic_irq(unsigned int irq)
+{
+	if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
+		unmask_ioasic_irq(irq);
+}
+
+static struct irq_chip ioasic_irq_type = {
+	.name = "IO-ASIC",
+	.ack = ack_ioasic_irq,
+	.mask = mask_ioasic_irq,
+	.mask_ack = ack_ioasic_irq,
+	.unmask = unmask_ioasic_irq,
+};
+
+
+#define unmask_ioasic_dma_irq unmask_ioasic_irq
+
+#define mask_ioasic_dma_irq mask_ioasic_irq
+
+#define ack_ioasic_dma_irq ack_ioasic_irq
+
+static inline void end_ioasic_dma_irq(unsigned int irq)
+{
+	clear_ioasic_irq(irq);
+	fast_iob();
+	end_ioasic_irq(irq);
+}
+
+static struct irq_chip ioasic_dma_irq_type = {
+	.name = "IO-ASIC-DMA",
+	.ack = ack_ioasic_dma_irq,
+	.mask = mask_ioasic_dma_irq,
+	.mask_ack = ack_ioasic_dma_irq,
+	.unmask = unmask_ioasic_dma_irq,
+	.end = end_ioasic_dma_irq,
+};
+
+
+void __init init_ioasic_irqs(int base)
+{
+	int i;
+
+	/* Mask interrupts. */
+	ioasic_write(IO_REG_SIMR, 0);
+	fast_iob();
+
+	for (i = base; i < base + IO_INR_DMA; i++)
+		set_irq_chip_and_handler(i, &ioasic_irq_type,
+					 handle_level_irq);
+	for (; i < base + IO_IRQ_LINES; i++)
+		set_irq_chip(i, &ioasic_dma_irq_type);
+
+	ioasic_irq_base = base;
+}