[PATCH] avr32 architecture

This adds support for the Atmel AVR32 architecture as well as the AT32AP7000
CPU and the AT32STK1000 development board.

AVR32 is a new high-performance 32-bit RISC microprocessor core, designed for
cost-sensitive embedded applications, with particular emphasis on low power
consumption and high code density.  The AVR32 architecture is not binary
compatible with earlier 8-bit AVR architectures.

The AVR32 architecture, including the instruction set, is described by the
AVR32 Architecture Manual, available from

http://www.atmel.com/dyn/resources/prod_documents/doc32000.pdf

The Atmel AT32AP7000 is the first CPU implementing the AVR32 architecture.  It
features a 7-stage pipeline, 16KB instruction and data caches and a full
Memory Management Unit.  It also comes with a large set of integrated
peripherals, many of which are shared with the AT91 ARM-based controllers from
Atmel.

Full data sheet is available from

http://www.atmel.com/dyn/resources/prod_documents/doc32003.pdf

while the CPU core implementation including caches and MMU is documented by
the AVR32 AP Technical Reference, available from

http://www.atmel.com/dyn/resources/prod_documents/doc32001.pdf

Information about the AT32STK1000 development board can be found at

http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3918

including a BSP CD image with an earlier version of this patch, development
tools (binaries and source/patches) and a root filesystem image suitable for
booting from SD card.

Alternatively, there's a preliminary "getting started" guide available at
http://avr32linux.org/twiki/bin/view/Main/GettingStarted which provides links
to the sources and patches you will need in order to set up a cross-compiling
environment for avr32-linux.

This patch, as well as the other patches included with the BSP and the
toolchain patches, is actively supported by Atmel Corporation.

[dmccr@us.ibm.com: Fix more pxx_page macro locations]
[bunk@stusta.de: fix `make defconfig']
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Dave McCracken <dmccr@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 128 insertions, 0 deletions

diff --git a/include/asm-avr32/intc.h b/include/asm-avr32/intc.h
new file mode 100644
index 000000000000..1ac9ca75e8fd
--- /dev/null
+++ b/include/asm-avr32/intc.h
@@ -0,0 +1,128 @@
+#ifndef __ASM_AVR32_INTC_H
+#define __ASM_AVR32_INTC_H
+
+#include <linux/sysdev.h>
+#include <linux/interrupt.h>
+
+struct irq_controller;
+struct irqaction;
+struct pt_regs;
+
+struct platform_device;
+
+/* Information about the internal interrupt controller */
+struct intc_device {
+        /* ioremapped address of configuration block */
+        void __iomem *regs;
+
+        /* the physical device */
+        struct platform_device *pdev;
+
+        /* Number of interrupt lines per group. */
+        unsigned int irqs_per_group;
+
+        /* The highest group ID + 1 */
+        unsigned int nr_groups;
+
+        /*
+         * Bitfield indicating which groups are actually in use.  The
+         * size of the array is
+         * ceil(group_max / (8 * sizeof(unsigned int))).
+         */
+        unsigned int group_mask[];
+};
+
+struct irq_controller_class {
+        /*
+         * A short name identifying this kind of controller.
+         */
+        const char *typename;
+        /*
+         * Handle the IRQ.  Must do any necessary acking and masking.
+         */
+        irqreturn_t (*handle)(int irq, void *dev_id, struct pt_regs *regs);
+        /*
+         * Register a new IRQ handler.
+         */
+        int (*setup)(struct irq_controller *ctrl, unsigned int irq,
+                     struct irqaction *action);
+        /*
+         * Unregister a IRQ handler.
+         */
+        void (*free)(struct irq_controller *ctrl, unsigned int irq,
+                     void *dev_id);
+        /*
+         * Mask the IRQ in the interrupt controller.
+         */
+        void (*mask)(struct irq_controller *ctrl, unsigned int irq);
+        /*
+         * Unmask the IRQ in the interrupt controller.
+         */
+        void (*unmask)(struct irq_controller *ctrl, unsigned int irq);
+        /*
+         * Set the type of the IRQ. See below for possible types.
+         * Return -EINVAL if a given type is not supported
+         */
+        int (*set_type)(struct irq_controller *ctrl, unsigned int irq,
+                        unsigned int type);
+        /*
+         * Return the IRQ type currently set
+         */
+        unsigned int (*get_type)(struct irq_controller *ctrl, unsigned int irq);
+};
+
+struct irq_controller {
+        struct irq_controller_class *class;
+        unsigned int irq_group;
+        unsigned int first_irq;
+        unsigned int nr_irqs;
+        struct list_head list;
+};
+
+struct intc_group_desc {
+        struct irq_controller *ctrl;
+        irqreturn_t (*handle)(int, void *, struct pt_regs *);
+        unsigned long flags;
+        void *dev_id;
+        const char *devname;
+};
+
+/*
+ * The internal interrupt controller.  Defined in board/part-specific
+ * devices.c.
+ * TODO: Should probably be defined per-cpu.
+ */
+extern struct intc_device intc;
+
+extern int request_internal_irq(unsigned int irq,
+                                irqreturn_t (*handler)(int, void *, struct pt_regs *),
+                                unsigned long irqflags,
+                                const char *devname, void *dev_id);
+extern void free_internal_irq(unsigned int irq);
+
+/* Only used by time_init() */
+extern int setup_internal_irq(unsigned int irq, struct intc_group_desc *desc);
+
+/*
+ * Set interrupt priority for a given group. `group' can be found by
+ * using irq_to_group(irq). Priority can be from 0 (lowest) to 3
+ * (highest). Higher-priority interrupts will preempt lower-priority
+ * interrupts (unless interrupts are masked globally).
+ *
+ * This function does not check for conflicts within a group.
+ */
+extern int intc_set_priority(unsigned int group,
+                             unsigned int priority);
+
+/*
+ * Returns a bitmask of pending interrupts in a group.
+ */
+extern unsigned long intc_get_pending(unsigned int group);
+
+/*
+ * Register a new external interrupt controller.  Returns the first
+ * external IRQ number that is assigned to the new controller.
+ */
+extern int intc_register_controller(struct irq_controller *ctrl);
+
+#endif /* __ASM_AVR32_INTC_H */