Merge with http://www.denx.de/git/u-boot.git

1 files changed, 142 insertions, 0 deletions

diff --git a/include/asm-blackfin/irq.h b/include/asm-blackfin/irq.h
new file mode 100644
index 0000000..5fbc5a3
--- /dev/null
+++ b/include/asm-blackfin/irq.h
@@ -0,0 +1,142 @@
+/*
+ * U-boot - irq.h Interrupt related header file
+ *
+ * Copyright (c) 2005 blackfin.uclinux.org
+ *
+ * This file was based on
+ * linux/arch/$(ARCH)/platform/$(PLATFORM)/irq.c
+ *
+ * Changed by HuTao Apr18, 2003
+ *
+ * Copyright was missing when I got the code so took from MIPS arch ...MaTed---
+ * Copyright (C) 1994 by Waldorf GMBH, written by Ralf Baechle
+ * Copyright (C) 1995, 96, 97, 98, 99, 2000, 2001 by Ralf Baechle
+ *
+ * Adapted for BlackFin (ADI) by Ted Ma <mated@sympatico.ca>
+ * Copyright (c) 2002 Arcturus Networks Inc. (www.arcturusnetworks.com)
+ * Copyright (c) 2002 Lineo, Inc. <mattw@lineo.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _BLACKFIN_IRQ_H_
+#define _BLACKFIN_IRQ_H_
+
+#include <linux/config.h>
+#include <asm/cpu/bf533_irq.h>
+
+/*
+ *   On the Blackfin, the interrupt structure allows remmapping of the hardware
+ *   levels.
+ * - I'm going to assume that the H/W level is going to stay at the default
+ *   settings. If someone wants to go through and abstart this out, feel free
+ *   to mod the interrupt numbering scheme.
+ * - I'm abstracting the interrupts so that uClinux does not know anything
+ *   about the H/W levels. If you want to change the H/W AND keep the abstracted
+ *   levels that uClinux sees, you should be able to do most of it here.
+ * - I've left the "abstract" numbering sparce in case someone wants to pull the
+ *   interrupts apart (just the TX/RX for the various devices)
+ */
+
+#define	NR_IRQS		SYS_IRQS
+/*
+ * "Generic" interrupt sources
+ */
+#define IRQ_SCHED_TIMER	(8)	/* interrupt source for scheduling timer */
+
+static __inline__ int irq_cannonicalize(int irq)
+{
+	return irq;
+}
+
+/*
+ * Machine specific interrupt sources.
+ *
+ * Adding an interrupt service routine for a source with this bit
+ * set indicates a special machine specific interrupt source.
+ * The machine specific files define these sources.
+ *
+ * The IRQ_MACHSPEC bit is now gone - the only thing it did was to
+ * introduce unnecessary overhead.
+ *
+ * All interrupt handling is actually machine specific so it is better
+ * to use function pointers, as used by the Sparc port, and select the
+ * interrupt handling functions when initializing the kernel. This way
+ * we save some unnecessary overhead at run-time.
+ * 01/11/97 - Jes
+ */
+
+extern void (*mach_enable_irq) (unsigned int);
+extern void (*mach_disable_irq) (unsigned int);
+extern int sys_request_irq(unsigned int,
+			void (*)(int, void *, struct pt_regs *),
+			unsigned long, const char *, void *);
+extern void sys_free_irq(unsigned int, void *);
+
+/*
+ * various flags for request_irq() - the Amiga now uses the standard
+ * mechanism like all other architectures - SA_INTERRUPT and SA_SHIRQ
+ * are your friends.
+ */
+#define IRQ_FLG_LOCK	(0x0001)	/* handler is not replaceable   */
+#define IRQ_FLG_REPLACE	(0x0002)	/* replace existing handler     */
+#define IRQ_FLG_FAST	(0x0004)
+#define IRQ_FLG_SLOW	(0x0008)
+#define IRQ_FLG_STD	(0x8000)	/* internally used              */
+
+/*
+ * This structure is used to chain together the ISRs for a particular
+ * interrupt source (if it supports chaining).
+ */
+typedef struct irq_node {
+	void (*handler) (int, void *, struct pt_regs *);
+	unsigned long flags;
+	void *dev_id;
+	const char *devname;
+	struct irq_node *next;
+} irq_node_t;
+
+/*
+ * This structure has only 4 elements for speed reasons
+ */
+typedef struct irq_handler {
+	void (*handler) (int, void *, struct pt_regs *);
+	unsigned long flags;
+	void *dev_id;
+	const char *devname;
+} irq_handler_t;
+
+/* count of spurious interrupts */
+extern volatile unsigned int num_spurious;
+
+/*
+ * This function returns a new irq_node_t
+ */
+extern irq_node_t *new_irq_node(void);
+
+/*
+ * Some drivers want these entry points
+ */
+#define enable_irq(x)	(mach_enable_irq  ? (*mach_enable_irq)(x)  : 0)
+#define disable_irq(x)	(mach_disable_irq ? (*mach_disable_irq)(x) : 0)
+
+#define enable_irq_nosync(x)	enable_irq(x)
+#define disable_irq_nosync(x)	disable_irq(x)
+
+#endif