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#ifdef __KERNEL__

 * 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;


/* 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>

#define NR_BOARD_IRQS 0

#ifndef UIC_WIDTH /* Number of interrupts per device */
#define UIC_WIDTH 32

#ifndef NR_UICS /* number  of UIC devices */
#define NR_UICS 1

#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_IRQS         ((NR_UIC_IRQS * NR_UICS) + NR_BOARD_IRQS)

#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

#define SIU_IRQ_OFFSET        0

#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.
#define PIT_INTERRUPT         SIU_LEVEL0
#ifndef     CPM_INTERRUPT
#define CPM_INTERRUPT         SIU_LEVEL2
#ifndef     DEC_INTERRUPT
#define DEC_INTERRUPT         SIU_LEVEL7

/* 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)))

#elif defined(CONFIG_83xx)
#include <asm/mpc83xx.h>

#define     NR_IRQS     (NR_IPIC_INTS)

#elif defined(CONFIG_85xx)
/* Now include the board configuration specific associations.
#include <asm/mpc85xx.h>

/* The MPC8548 openpic has 48 internal interrupts and 12 external
 * interrupts.
 * We are "flattening" the interrupt vectors of the cascaded CPM
 * so that we can uniquely identify any interrupt source with a
 * single integer.
#define NR_CPM_INTS     64
#define NR_EPIC_INTS    60
#ifndef NR_8259_INTS
#define NR_8259_INTS    0
#define NUM_8259_INTERRUPTS NR_8259_INTS

#define CPM_IRQ_OFFSET  0


/* Internal IRQs on MPC85xx OpenPIC */

#ifdef CONFIG_CPM2

/* Not all of these exist on all MPC85xx implementations */
#define MPC85xx_IRQ_L2CACHE   ( 0 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_ECM       ( 1 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_DDR       ( 2 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_LBIU      ( 3 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_DMA0      ( 4 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_DMA1      ( 5 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_DMA2      ( 6 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_DMA3      ( 7 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_PCI1      ( 8 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_PCI2      ( 9 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_RIO_TX    (11 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_RIO_RX    (12 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_TSEC1_TX  (13 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_TSEC1_RX  (14 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_TSEC3_TX  (15 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_TSEC3_RX  (16 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_TSEC3_ERROR     (17 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_TSEC1_ERROR     (18 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_TSEC2_TX  (19 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_TSEC2_RX  (20 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_TSEC4_TX  (21 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_TSEC4_RX  (22 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_TSEC4_ERROR     (23 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_TSEC2_ERROR     (24 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_FEC       (25 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_DUART     (26 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_IIC1      (27 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_SEC2      (29 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_CPM       (30 + MPC85xx_OPENPIC_IRQ_OFFSET)

/* The 12 external interrupt lines */
#define MPC85xx_IRQ_EXT0        (48 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_EXT1        (49 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_EXT2        (50 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_EXT3        (51 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_EXT4        (52 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_EXT5        (53 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_EXT6        (54 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_EXT7        (55 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_EXT8        (56 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_EXT9        (57 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_EXT10       (58 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_EXT11       (59 + MPC85xx_OPENPIC_IRQ_OFFSET)

/* CPM related interrupts */
#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_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_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)

#elif defined(CONFIG_PPC_86xx)
#include <asm/mpc86xx.h>

#define NR_EPIC_INTS 48
#ifndef NR_8259_INTS
#define NR_8259_INTS 16 /*ULI 1575 can route 12 interrupts */
#define NUM_8259_INTERRUPTS NR_8259_INTS

#ifndef I8259_OFFSET
#define I8259_OFFSET 0

#define NR_IRQS 256

/* Internal IRQs on MPC86xx OpenPIC */


/* The 48 internal sources */
#define MPC86xx_IRQ_NULL        ( 0 + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_MCM         ( 1 + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_DDR         ( 2 + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_LBC         ( 3 + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_DMA0        ( 4 + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_DMA1        ( 5 + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_DMA2        ( 6 + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_DMA3        ( 7 + MPC86xx_OPENPIC_IRQ_OFFSET)

/* no 10,11 */
#define MPC86xx_IRQ_UART2       (12 + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_TSEC1_TX    (13 + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_TSEC1_RX    (14 + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_TSEC3_TX    (15 + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_TSEC3_RX    (16 + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_TSEC2_TX    (19 + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_TSEC2_RX    (20 + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_TSEC4_TX    (21 + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_TSEC4_RX    (22 + MPC86xx_OPENPIC_IRQ_OFFSET)
/* no 25 */
#define MPC86xx_IRQ_UART1       (26 + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_IIC         (27 + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_PERFMON       (28 + MPC86xx_OPENPIC_IRQ_OFFSET)
/* no 29,30,31 */
/* no 35,36 */

/* The 12 external interrupt lines */
#define MPC86xx_IRQ_EXT_BASE  48
#define MPC86xx_IRQ_EXT0      (0 + MPC86xx_IRQ_EXT_BASE \
            + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_EXT1      (1 + MPC86xx_IRQ_EXT_BASE \
            + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_EXT2      (2 + MPC86xx_IRQ_EXT_BASE \
            + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_EXT3      (3 + MPC86xx_IRQ_EXT_BASE \
            + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_EXT4      (4 + MPC86xx_IRQ_EXT_BASE \
            + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_EXT5      (5 + MPC86xx_IRQ_EXT_BASE \
            + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_EXT6      (6 + MPC86xx_IRQ_EXT_BASE \
            + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_EXT7      (7 + MPC86xx_IRQ_EXT_BASE \
            + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_EXT8      (8 + MPC86xx_IRQ_EXT_BASE \
            + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_EXT9      (9 + MPC86xx_IRQ_EXT_BASE \
            + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_EXT10     (10 + MPC86xx_IRQ_EXT_BASE \
            + MPC86xx_OPENPIC_IRQ_OFFSET)
#define MPC86xx_IRQ_EXT11     (11 + MPC86xx_IRQ_EXT_BASE \
            + MPC86xx_OPENPIC_IRQ_OFFSET)

#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).

#define CPM_IRQ_OFFSET  0

#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;
#define ppc_do_canonicalize_irqs    0

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;


extern void __do_softirq(void);

 * 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);
#define irq_ctx_init()


extern void do_IRQ(struct pt_regs *regs);

#endif /* _ASM_IRQ_H */
#endif /* __KERNEL__ */

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