1 files changed, 654 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/irq.h b/arch/powerpc/include/asm/irq.h
new file mode 100644
index 000000000000..1ef8e304e0ea
--- /dev/null
+++ b/arch/powerpc/include/asm/irq.h
@@ -0,0 +1,654 @@
+#ifdef __KERNEL__
+#ifndef _ASM_POWERPC_IRQ_H
+#define _ASM_POWERPC_IRQ_H
+
+/*
+ * 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/threads.h>
+#include <linux/list.h>
+#include <linux/radix-tree.h>
+
+#include <asm/types.h>
+#include <asm/atomic.h>
+
+
+#define get_irq_desc(irq) (&irq_desc[(irq)])
+
+/* Define a way to iterate across irqs. */
+#define for_each_irq(i) \
+        for ((i) = 0; (i) < NR_IRQS; ++(i))
+
+extern atomic_t ppc_n_lost_interrupts;
+
+#ifdef CONFIG_PPC_MERGE
+
+/* This number is used when no interrupt has been assigned */
+#define NO_IRQ                  (0)
+
+/* This is a special irq number to return from get_irq() to tell that
+ * no interrupt happened _and_ ignore it (don't count it as bad). Some
+ * platforms like iSeries rely on that.
+ */
+#define NO_IRQ_IGNORE           ((unsigned int)-1)
+
+/* Total number of virq in the platform (make it a CONFIG_* option ? */
+#define NR_IRQS         512
+
+/* Number of irqs reserved for the legacy controller */
+#define NUM_ISA_INTERRUPTS      16
+
+/* This type is the placeholder for a hardware interrupt number. It has to
+ * be big enough to enclose whatever representation is used by a given
+ * platform.
+ */
+typedef unsigned long irq_hw_number_t;
+
+/* Interrupt controller "host" data structure. This could be defined as a
+ * irq domain controller. That is, it handles the mapping between hardware
+ * and virtual interrupt numbers for a given interrupt domain. The host
+ * structure is generally created by the PIC code for a given PIC instance
+ * (though a host can cover more than one PIC if they have a flat number
+ * model). It's the host callbacks that are responsible for setting the
+ * irq_chip on a given irq_desc after it's been mapped.
+ *
+ * The host code and data structures are fairly agnostic to the fact that
+ * we use an open firmware device-tree. We do have references to struct
+ * device_node in two places: in irq_find_host() to find the host matching
+ * a given interrupt controller node, and of course as an argument to its
+ * counterpart host->ops->match() callback. However, those are treated as
+ * generic pointers by the core and the fact that it's actually a device-node
+ * pointer is purely a convention between callers and implementation. This
+ * code could thus be used on other architectures by replacing those two
+ * by some sort of arch-specific void * "token" used to identify interrupt
+ * controllers.
+ */
+struct irq_host;
+struct radix_tree_root;
+
+/* Functions below are provided by the host and called whenever a new mapping
+ * is created or an old mapping is disposed. The host can then proceed to
+ * whatever internal data structures management is required. It also needs
+ * to setup the irq_desc when returning from map().
+ */
+struct irq_host_ops {
+        /* Match an interrupt controller device node to a host, returns
+         * 1 on a match
+         */
+        int (*match)(struct irq_host *h, struct device_node *node);
+
+        /* Create or update a mapping between a virtual irq number and a hw
+         * irq number. This is called only once for a given mapping.
+         */
+        int (*map)(struct irq_host *h, unsigned int virq, irq_hw_number_t hw);
+
+        /* Dispose of such a mapping */
+        void (*unmap)(struct irq_host *h, unsigned int virq);
+
+        /* Update of such a mapping  */
+        void (*remap)(struct irq_host *h, unsigned int virq, irq_hw_number_t hw);
+
+        /* Translate device-tree interrupt specifier from raw format coming
+         * from the firmware to a irq_hw_number_t (interrupt line number) and
+         * type (sense) that can be passed to set_irq_type(). In the absence
+         * of this callback, irq_create_of_mapping() and irq_of_parse_and_map()
+         * will return the hw number in the first cell and IRQ_TYPE_NONE for
+         * the type (which amount to keeping whatever default value the
+         * interrupt controller has for that line)
+         */
+        int (*xlate)(struct irq_host *h, struct device_node *ctrler,
+                     u32 *intspec, unsigned int intsize,
+                     irq_hw_number_t *out_hwirq, unsigned int *out_type);
+};
+
+struct irq_host {
+        struct list_head        link;
+
+        /* type of reverse mapping technique */
+        unsigned int            revmap_type;
+#define IRQ_HOST_MAP_LEGACY     0 /* legacy 8259, gets irqs 1..15 */
+#define IRQ_HOST_MAP_NOMAP      1 /* no fast reverse mapping */
+#define IRQ_HOST_MAP_LINEAR     2 /* linear map of interrupts */
+#define IRQ_HOST_MAP_TREE       3 /* radix tree */
+        union {
+                struct {
+                        unsigned int size;
+                        unsigned int *revmap;
+                } linear;
+                struct radix_tree_root tree;
+        } revmap_data;
+        struct irq_host_ops     *ops;
+        void                    *host_data;
+        irq_hw_number_t         inval_irq;
+
+        /* Optional device node pointer */
+        struct device_node      *of_node;
+};
+
+/* The main irq map itself is an array of NR_IRQ entries containing the
+ * associate host and irq number. An entry with a host of NULL is free.
+ * An entry can be allocated if it's free, the allocator always then sets
+ * hwirq first to the host's invalid irq number and then fills ops.
+ */
+struct irq_map_entry {
+        irq_hw_number_t hwirq;
+        struct irq_host *host;
+};
+
+extern struct irq_map_entry irq_map[NR_IRQS];
+
+extern irq_hw_number_t virq_to_hw(unsigned int virq);
+
+/**
+ * irq_alloc_host - Allocate a new irq_host data structure
+ * @of_node: optional device-tree node of the interrupt controller
+ * @revmap_type: type of reverse mapping to use
+ * @revmap_arg: for IRQ_HOST_MAP_LINEAR linear only: size of the map
+ * @ops: map/unmap host callbacks
+ * @inval_irq: provide a hw number in that host space that is always invalid
+ *
+ * Allocates and initialize and irq_host structure. Note that in the case of
+ * IRQ_HOST_MAP_LEGACY, the map() callback will be called before this returns
+ * for all legacy interrupts except 0 (which is always the invalid irq for
+ * a legacy controller). For a IRQ_HOST_MAP_LINEAR, the map is allocated by
+ * this call as well. For a IRQ_HOST_MAP_TREE, the radix tree will be allocated
+ * later during boot automatically (the reverse mapping will use the slow path
+ * until that happens).
+ */
+extern struct irq_host *irq_alloc_host(struct device_node *of_node,
+                                       unsigned int revmap_type,
+                                       unsigned int revmap_arg,
+                                       struct irq_host_ops *ops,
+                                       irq_hw_number_t inval_irq);
+
+
+/**
+ * irq_find_host - Locates a host for a given device node
+ * @node: device-tree node of the interrupt controller
+ */
+extern struct irq_host *irq_find_host(struct device_node *node);
+
+
+/**
+ * irq_set_default_host - Set a "default" host
+ * @host: default host pointer
+ *
+ * For convenience, it's possible to set a "default" host that will be used
+ * whenever NULL is passed to irq_create_mapping(). It makes life easier for
+ * platforms that want to manipulate a few hard coded interrupt numbers that
+ * aren't properly represented in the device-tree.
+ */
+extern void irq_set_default_host(struct irq_host *host);
+
+
+/**
+ * irq_set_virq_count - Set the maximum number of virt irqs
+ * @count: number of linux virtual irqs, capped with NR_IRQS
+ *
+ * This is mainly for use by platforms like iSeries who want to program
+ * the virtual irq number in the controller to avoid the reverse mapping
+ */
+extern void irq_set_virq_count(unsigned int count);
+
+
+/**
+ * irq_create_mapping - Map a hardware interrupt into linux virq space
+ * @host: host owning this hardware interrupt or NULL for default host
+ * @hwirq: hardware irq number in that host space
+ *
+ * Only one mapping per hardware interrupt is permitted. Returns a linux
+ * virq number.
+ * If the sense/trigger is to be specified, set_irq_type() should be called
+ * on the number returned from that call.
+ */
+extern unsigned int irq_create_mapping(struct irq_host *host,
+                                       irq_hw_number_t hwirq);
+
+
+/**
+ * irq_dispose_mapping - Unmap an interrupt
+ * @virq: linux virq number of the interrupt to unmap
+ */
+extern void irq_dispose_mapping(unsigned int virq);
+
+/**
+ * irq_find_mapping - Find a linux virq from an hw irq number.
+ * @host: host owning this hardware interrupt
+ * @hwirq: hardware irq number in that host space
+ *
+ * This is a slow path, for use by generic code. It's expected that an
+ * irq controller implementation directly calls the appropriate low level
+ * mapping function.
+ */
+extern unsigned int irq_find_mapping(struct irq_host *host,
+                                     irq_hw_number_t hwirq);
+
+/**
+ * irq_create_direct_mapping - Allocate a virq for direct mapping
+ * @host: host to allocate the virq for or NULL for default host
+ *
+ * This routine is used for irq controllers which can choose the hardware
+ * interrupt numbers they generate. In such a case it's simplest to use
+ * the linux virq as the hardware interrupt number.
+ */
+extern unsigned int irq_create_direct_mapping(struct irq_host *host);
+
+/**
+ * irq_radix_revmap - Find a linux virq from a hw irq number.
+ * @host: host owning this hardware interrupt
+ * @hwirq: hardware irq number in that host space
+ *
+ * This is a fast path, for use by irq controller code that uses radix tree
+ * revmaps
+ */
+extern unsigned int irq_radix_revmap(struct irq_host *host,
+                                     irq_hw_number_t hwirq);
+
+/**
+ * irq_linear_revmap - Find a linux virq from a hw irq number.
+ * @host: host owning this hardware interrupt
+ * @hwirq: hardware irq number in that host space
+ *
+ * This is a fast path, for use by irq controller code that uses linear
+ * revmaps. It does fallback to the slow path if the revmap doesn't exist
+ * yet and will create the revmap entry with appropriate locking
+ */
+
+extern unsigned int irq_linear_revmap(struct irq_host *host,
+                                      irq_hw_number_t hwirq);
+
+
+
+/**
+ * irq_alloc_virt - Allocate virtual irq numbers
+ * @host: host owning these new virtual irqs
+ * @count: number of consecutive numbers to allocate
+ * @hint: pass a hint number, the allocator will try to use a 1:1 mapping
+ *
+ * This is a low level function that is used internally by irq_create_mapping()
+ * and that can be used by some irq controllers implementations for things
+ * like allocating ranges of numbers for MSIs. The revmaps are left untouched.
+ */
+extern unsigned int irq_alloc_virt(struct irq_host *host,
+                                   unsigned int count,
+                                   unsigned int hint);
+
+/**
+ * irq_free_virt - Free virtual irq numbers
+ * @virq: virtual irq number of the first interrupt to free
+ * @count: number of interrupts to free
+ *
+ * This function is the opposite of irq_alloc_virt. It will not clear reverse
+ * maps, this should be done previously by unmap'ing the interrupt. In fact,
+ * all interrupts covered by the range being freed should have been unmapped
+ * prior to calling this.
+ */
+extern void irq_free_virt(unsigned int virq, unsigned int count);
+
+
+/* -- OF helpers -- */
+
+/* irq_create_of_mapping - Map a hardware interrupt into linux virq space
+ * @controller: Device node of the interrupt controller
+ * @inspec: Interrupt specifier from the device-tree
+ * @intsize: Size of the interrupt specifier from the device-tree
+ *
+ * This function is identical to irq_create_mapping except that it takes
+ * as input informations straight from the device-tree (typically the results
+ * of the of_irq_map_*() functions.
+ */
+extern unsigned int irq_create_of_mapping(struct device_node *controller,
+                                          u32 *intspec, unsigned int intsize);
+
+
+/* irq_of_parse_and_map - Parse nad Map an interrupt into linux virq space
+ * @device: Device node of the device whose interrupt is to be mapped
+ * @index: Index of the interrupt to map
+ *
+ * This function is a wrapper that chains of_irq_map_one() and
+ * irq_create_of_mapping() to make things easier to callers
+ */
+extern unsigned int irq_of_parse_and_map(struct device_node *dev, int index);
+
+/* -- End OF helpers -- */
+
+/**
+ * irq_early_init - Init irq remapping subsystem
+ */
+extern void irq_early_init(void);
+
+static __inline__ int irq_canonicalize(int irq)
+{
+        return irq;
+}
+
+
+#else /* CONFIG_PPC_MERGE */
+
+/* This number is used when no interrupt has been assigned */
+#define NO_IRQ                  (-1)
+#define NO_IRQ_IGNORE           (-2)
+
+
+/*
+ * These constants are used for passing information about interrupt
+ * signal polarity and level/edge sensing to the low-level PIC chip
+ * drivers.
+ */
+#define IRQ_SENSE_MASK          0x1
+#define IRQ_SENSE_LEVEL         0x1     /* interrupt on active level */
+#define IRQ_SENSE_EDGE          0x0     /* interrupt triggered by edge */
+
+#define IRQ_POLARITY_MASK       0x2
+#define IRQ_POLARITY_POSITIVE   0x2     /* high level or low->high edge */
+#define IRQ_POLARITY_NEGATIVE   0x0     /* low level or high->low edge */
+
+
+#if defined(CONFIG_40x)
+#include <asm/ibm4xx.h>
+
+#ifndef NR_BOARD_IRQS
+#define NR_BOARD_IRQS 0
+#endif
+
+#ifndef UIC_WIDTH /* Number of interrupts per device */
+#define UIC_WIDTH 32
+#endif
+
+#ifndef NR_UICS /* number  of UIC devices */
+#define NR_UICS 1
+#endif
+
+#if defined (CONFIG_403)
+/*
+ * The PowerPC 403 cores' Asynchronous Interrupt Controller (AIC) has
+ * 32 possible interrupts, a majority of which are not implemented on
+ * all cores. There are six configurable, external interrupt pins and
+ * there are eight internal interrupts for the on-chip serial port
+ * (SPU), DMA controller, and JTAG controller.
+ *
+ */
+
+#define NR_AIC_IRQS 32
+#define NR_IRQS  (NR_AIC_IRQS + NR_BOARD_IRQS)
+
+#elif !defined (CONFIG_403)
+
+/*
+ *  The PowerPC 405 cores' Universal Interrupt Controller (UIC) has 32
+ * possible interrupts as well. There are seven, configurable external
+ * interrupt pins and there are 17 internal interrupts for the on-chip
+ * serial port, DMA controller, on-chip Ethernet controller, PCI, etc.
+ *
+ */
+
+
+#define NR_UIC_IRQS UIC_WIDTH
+#define NR_IRQS         ((NR_UIC_IRQS * NR_UICS) + NR_BOARD_IRQS)
+#endif
+
+#elif defined(CONFIG_44x)
+#include <asm/ibm44x.h>
+
+#define NR_UIC_IRQS     32
+#define NR_IRQS         ((NR_UIC_IRQS * NR_UICS) + NR_BOARD_IRQS)
+
+#elif defined(CONFIG_8xx)
+
+/* Now include the board configuration specific associations.
+*/
+#include <asm/mpc8xx.h>
+
+/* The MPC8xx cores have 16 possible interrupts.  There are eight
+ * possible level sensitive interrupts assigned and generated internally
+ * from such devices as CPM, PCMCIA, RTC, PIT, TimeBase and Decrementer.
+ * There are eight external interrupts (IRQs) that can be configured
+ * as either level or edge sensitive.
+ *
+ * On some implementations, there is also the possibility of an 8259
+ * through the PCI and PCI-ISA bridges.
+ *
+ * We are "flattening" the interrupt vectors of the cascaded CPM
+ * and 8259 interrupt controllers so that we can uniquely identify
+ * any interrupt source with a single integer.
+ */
+#define NR_SIU_INTS     16
+#define NR_CPM_INTS     32
+#ifndef NR_8259_INTS
+#define NR_8259_INTS 0
+#endif
+
+#define SIU_IRQ_OFFSET          0
+#define CPM_IRQ_OFFSET          (SIU_IRQ_OFFSET + NR_SIU_INTS)
+#define I8259_IRQ_OFFSET        (CPM_IRQ_OFFSET + NR_CPM_INTS)
+
+#define NR_IRQS (NR_SIU_INTS + NR_CPM_INTS + NR_8259_INTS)
+
+/* These values must be zero-based and map 1:1 with the SIU configuration.
+ * They are used throughout the 8xx I/O subsystem to generate
+ * interrupt masks, flags, and other control patterns.  This is why the
+ * current kernel assumption of the 8259 as the base controller is such
+ * a pain in the butt.
+ */
+#define SIU_IRQ0        (0)     /* Highest priority */
+#define SIU_LEVEL0      (1)
+#define SIU_IRQ1        (2)
+#define SIU_LEVEL1      (3)
+#define SIU_IRQ2        (4)
+#define SIU_LEVEL2      (5)
+#define SIU_IRQ3        (6)
+#define SIU_LEVEL3      (7)
+#define SIU_IRQ4        (8)
+#define SIU_LEVEL4      (9)
+#define SIU_IRQ5        (10)
+#define SIU_LEVEL5      (11)
+#define SIU_IRQ6        (12)
+#define SIU_LEVEL6      (13)
+#define SIU_IRQ7        (14)
+#define SIU_LEVEL7      (15)
+
+#define MPC8xx_INT_FEC1         SIU_LEVEL1
+#define MPC8xx_INT_FEC2         SIU_LEVEL3
+
+#define MPC8xx_INT_SCC1         (CPM_IRQ_OFFSET + CPMVEC_SCC1)
+#define MPC8xx_INT_SCC2         (CPM_IRQ_OFFSET + CPMVEC_SCC2)
+#define MPC8xx_INT_SCC3         (CPM_IRQ_OFFSET + CPMVEC_SCC3)
+#define MPC8xx_INT_SCC4         (CPM_IRQ_OFFSET + CPMVEC_SCC4)
+#define MPC8xx_INT_SMC1         (CPM_IRQ_OFFSET + CPMVEC_SMC1)
+#define MPC8xx_INT_SMC2         (CPM_IRQ_OFFSET + CPMVEC_SMC2)
+
+/* The internal interrupts we can configure as we see fit.
+ * My personal preference is CPM at level 2, which puts it above the
+ * MBX PCI/ISA/IDE interrupts.
+ */
+#ifndef PIT_INTERRUPT
+#define PIT_INTERRUPT           SIU_LEVEL0
+#endif
+#ifndef CPM_INTERRUPT
+#define CPM_INTERRUPT           SIU_LEVEL2
+#endif
+#ifndef PCMCIA_INTERRUPT
+#define PCMCIA_INTERRUPT        SIU_LEVEL6
+#endif
+#ifndef DEC_INTERRUPT
+#define DEC_INTERRUPT           SIU_LEVEL7
+#endif
+
+/* Some internal interrupt registers use an 8-bit mask for the interrupt
+ * level instead of a number.
+ */
+#define mk_int_int_mask(IL) (1 << (7 - (IL/2)))
+
+#else /* CONFIG_40x + CONFIG_8xx */
+/*
+ * this is the # irq's for all ppc arch's (pmac/chrp/prep)
+ * so it is the max of them all
+ */
+#define NR_IRQS                 256
+#define __DO_IRQ_CANON  1
+
+#ifndef CONFIG_8260
+
+#define NUM_8259_INTERRUPTS     16
+
+#else /* CONFIG_8260 */
+
+/* The 8260 has an internal interrupt controller with a maximum of
+ * 64 IRQs.  We will use NR_IRQs from above since it is large enough.
+ * Don't be confused by the 8260 documentation where they list an
+ * "interrupt number" and "interrupt vector".  We are only interested
+ * in the interrupt vector.  There are "reserved" holes where the
+ * vector number increases, but the interrupt number in the table does not.
+ * (Document errata updates have fixed this...make sure you have up to
+ * date processor documentation -- Dan).
+ */
+
+#ifndef CPM_IRQ_OFFSET
+#define CPM_IRQ_OFFSET  0
+#endif
+
+#define NR_CPM_INTS     64
+
+#define SIU_INT_ERROR           ((uint)0x00 + CPM_IRQ_OFFSET)
+#define SIU_INT_I2C             ((uint)0x01 + CPM_IRQ_OFFSET)
+#define SIU_INT_SPI             ((uint)0x02 + CPM_IRQ_OFFSET)
+#define SIU_INT_RISC            ((uint)0x03 + CPM_IRQ_OFFSET)
+#define SIU_INT_SMC1            ((uint)0x04 + CPM_IRQ_OFFSET)
+#define SIU_INT_SMC2            ((uint)0x05 + CPM_IRQ_OFFSET)
+#define SIU_INT_IDMA1           ((uint)0x06 + CPM_IRQ_OFFSET)
+#define SIU_INT_IDMA2           ((uint)0x07 + CPM_IRQ_OFFSET)
+#define SIU_INT_IDMA3           ((uint)0x08 + CPM_IRQ_OFFSET)
+#define SIU_INT_IDMA4           ((uint)0x09 + CPM_IRQ_OFFSET)
+#define SIU_INT_SDMA            ((uint)0x0a + CPM_IRQ_OFFSET)
+#define SIU_INT_USB             ((uint)0x0b + CPM_IRQ_OFFSET)
+#define SIU_INT_TIMER1          ((uint)0x0c + CPM_IRQ_OFFSET)
+#define SIU_INT_TIMER2          ((uint)0x0d + CPM_IRQ_OFFSET)
+#define SIU_INT_TIMER3          ((uint)0x0e + CPM_IRQ_OFFSET)
+#define SIU_INT_TIMER4          ((uint)0x0f + CPM_IRQ_OFFSET)
+#define SIU_INT_TMCNT           ((uint)0x10 + CPM_IRQ_OFFSET)
+#define SIU_INT_PIT             ((uint)0x11 + CPM_IRQ_OFFSET)
+#define SIU_INT_PCI             ((uint)0x12 + CPM_IRQ_OFFSET)
+#define SIU_INT_IRQ1            ((uint)0x13 + CPM_IRQ_OFFSET)
+#define SIU_INT_IRQ2            ((uint)0x14 + CPM_IRQ_OFFSET)
+#define SIU_INT_IRQ3            ((uint)0x15 + CPM_IRQ_OFFSET)
+#define SIU_INT_IRQ4            ((uint)0x16 + CPM_IRQ_OFFSET)
+#define SIU_INT_IRQ5            ((uint)0x17 + CPM_IRQ_OFFSET)
+#define SIU_INT_IRQ6            ((uint)0x18 + CPM_IRQ_OFFSET)
+#define SIU_INT_IRQ7            ((uint)0x19 + CPM_IRQ_OFFSET)
+#define SIU_INT_FCC1            ((uint)0x20 + CPM_IRQ_OFFSET)
+#define SIU_INT_FCC2            ((uint)0x21 + CPM_IRQ_OFFSET)
+#define SIU_INT_FCC3            ((uint)0x22 + CPM_IRQ_OFFSET)
+#define SIU_INT_MCC1            ((uint)0x24 + CPM_IRQ_OFFSET)
+#define SIU_INT_MCC2            ((uint)0x25 + CPM_IRQ_OFFSET)
+#define SIU_INT_SCC1            ((uint)0x28 + CPM_IRQ_OFFSET)
+#define SIU_INT_SCC2            ((uint)0x29 + CPM_IRQ_OFFSET)
+#define SIU_INT_SCC3            ((uint)0x2a + CPM_IRQ_OFFSET)
+#define SIU_INT_SCC4            ((uint)0x2b + CPM_IRQ_OFFSET)
+#define SIU_INT_PC15            ((uint)0x30 + CPM_IRQ_OFFSET)
+#define SIU_INT_PC14            ((uint)0x31 + CPM_IRQ_OFFSET)
+#define SIU_INT_PC13            ((uint)0x32 + CPM_IRQ_OFFSET)
+#define SIU_INT_PC12            ((uint)0x33 + CPM_IRQ_OFFSET)
+#define SIU_INT_PC11            ((uint)0x34 + CPM_IRQ_OFFSET)
+#define SIU_INT_PC10            ((uint)0x35 + CPM_IRQ_OFFSET)
+#define SIU_INT_PC9             ((uint)0x36 + CPM_IRQ_OFFSET)
+#define SIU_INT_PC8             ((uint)0x37 + CPM_IRQ_OFFSET)
+#define SIU_INT_PC7             ((uint)0x38 + CPM_IRQ_OFFSET)
+#define SIU_INT_PC6             ((uint)0x39 + CPM_IRQ_OFFSET)
+#define SIU_INT_PC5             ((uint)0x3a + CPM_IRQ_OFFSET)
+#define SIU_INT_PC4             ((uint)0x3b + CPM_IRQ_OFFSET)
+#define SIU_INT_PC3             ((uint)0x3c + CPM_IRQ_OFFSET)
+#define SIU_INT_PC2             ((uint)0x3d + CPM_IRQ_OFFSET)
+#define SIU_INT_PC1             ((uint)0x3e + CPM_IRQ_OFFSET)
+#define SIU_INT_PC0             ((uint)0x3f + CPM_IRQ_OFFSET)
+
+#endif /* CONFIG_8260 */
+
+#endif /* Whatever way too big #ifdef */
+
+#define NR_MASK_WORDS   ((NR_IRQS + 31) / 32)
+/* pedantic: these are long because they are used with set_bit --RR */
+extern unsigned long ppc_cached_irq_mask[NR_MASK_WORDS];
+
+/*
+ * Because many systems have two overlapping names spaces for
+ * interrupts (ISA and XICS for example), and the ISA interrupts
+ * have historically not been easy to renumber, we allow ISA
+ * interrupts to take values 0 - 15, and shift up the remaining
+ * interrupts by 0x10.
+ */
+#define NUM_ISA_INTERRUPTS      0x10
+extern int __irq_offset_value;
+
+static inline int irq_offset_up(int irq)
+{
+        return(irq + __irq_offset_value);
+}
+
+static inline int irq_offset_down(int irq)
+{
+        return(irq - __irq_offset_value);
+}
+
+static inline int irq_offset_value(void)
+{
+        return __irq_offset_value;
+}
+
+#ifdef __DO_IRQ_CANON
+extern int ppc_do_canonicalize_irqs;
+#else
+#define ppc_do_canonicalize_irqs        0
+#endif
+
+static __inline__ int irq_canonicalize(int irq)
+{
+        if (ppc_do_canonicalize_irqs && irq == 2)
+                irq = 9;
+        return irq;
+}
+#endif /* CONFIG_PPC_MERGE */
+
+extern int distribute_irqs;
+
+struct irqaction;
+struct pt_regs;
+
+#define __ARCH_HAS_DO_SOFTIRQ
+
+#if defined(CONFIG_BOOKE) || defined(CONFIG_40x)
+/*
+ * Per-cpu stacks for handling critical, debug and machine check
+ * level interrupts.
+ */
+extern struct thread_info *critirq_ctx[NR_CPUS];
+extern struct thread_info *dbgirq_ctx[NR_CPUS];
+extern struct thread_info *mcheckirq_ctx[NR_CPUS];
+extern void exc_lvl_ctx_init(void);
+#else
+#define exc_lvl_ctx_init()
+#endif
+
+#ifdef CONFIG_IRQSTACKS
+/*
+ * Per-cpu stacks for handling hard and soft interrupts.
+ */
+extern struct thread_info *hardirq_ctx[NR_CPUS];
+extern struct thread_info *softirq_ctx[NR_CPUS];
+
+extern void irq_ctx_init(void);
+extern void call_do_softirq(struct thread_info *tp);
+extern int call_handle_irq(int irq, void *p1,
+                           struct thread_info *tp, void *func);
+#else
+#define irq_ctx_init()
+
+#endif /* CONFIG_IRQSTACKS */
+
+extern void do_IRQ(struct pt_regs *regs);
+
+#endif /* _ASM_IRQ_H */
+#endif /* __KERNEL__ */