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6d0124fc06
linux/include/asm-powerpc/irq.h
Paul Mackerras 6d0124fc06 powerpc: Fix interrupt-tree parsing 
The interrupt-tree parsing code wasn't offsetting interrupt numbers
by 16 on 32-bit platforms with an i8259 interrupt controller, and
it was confused about the encoding of interrupt sense and level
(which is different for i8259 and openpic interrupt controllers,
just to make things interesting).

Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-10-26 17:19:06 +10:00

505 lines
16 KiB
C
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#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/config.h>
#include <linux/threads.h>
#include <asm/types.h>
#include <asm/atomic.h>
/* this number is used when no interrupt has been assigned */
#define NO_IRQ (-1)
/*
* 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 */
/*
* IRQ line status macro IRQ_PER_CPU is used
*/
#define ARCH_HAS_IRQ_PER_CPU
#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))
#ifdef CONFIG_PPC64
/*
* Maximum number of interrupt sources that we can handle.
*/
#define NR_IRQS 512
/* Interrupt numbers are virtual in case they are sparsely
* distributed by the hardware.
*/
extern unsigned int virt_irq_to_real_map[NR_IRQS];
/* Create a mapping for a real_irq if it doesn't already exist.
* Return the virtual irq as a convenience.
*/
int virt_irq_create_mapping(unsigned int real_irq);
void virt_irq_init(void);
static inline unsigned int virt_irq_to_real(unsigned int virt_irq)
{
return virt_irq_to_real_map[virt_irq];
}
extern unsigned int real_irq_to_virt_slowpath(unsigned int real_irq);
/*
* List of interrupt controllers.
*/
#define IC_INVALID 0
#define IC_OPEN_PIC 1
#define IC_PPC_XIC 2
#define IC_BPA_IIC 3
#define IC_ISERIES 4
extern u64 ppc64_interrupt_controller;
#else /* 32-bit */
#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)))
#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
#endif
#define NUM_8259_INTERRUPTS NR_8259_INTS
#ifndef CPM_IRQ_OFFSET
#define CPM_IRQ_OFFSET 0
#endif
#define NR_IRQS (NR_EPIC_INTS + NR_CPM_INTS + NR_8259_INTS)
/* Internal IRQs on MPC85xx OpenPIC */
#ifndef MPC85xx_OPENPIC_IRQ_OFFSET
#ifdef CONFIG_CPM2
#define MPC85xx_OPENPIC_IRQ_OFFSET (CPM_IRQ_OFFSET + NR_CPM_INTS)
#else
#define MPC85xx_OPENPIC_IRQ_OFFSET 0
#endif
#endif
/* 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_ERROR ( 9 + MPC85xx_OPENPIC_IRQ_OFFSET)
#define MPC85xx_IRQ_RIO_BELL (10 + 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_PERFMON (28 + 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)
#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_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
#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];
extern unsigned long ppc_lost_interrupts[NR_MASK_WORDS];
extern atomic_t ppc_n_lost_interrupts;
#define virt_irq_create_mapping(x) (x)
#endif
/*
* 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;
}
extern int distribute_irqs;
struct irqaction;
struct pt_regs;
#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_event(int irq, struct pt_regs *regs,
struct irqaction *action, struct thread_info *tp);
#define __ARCH_HAS_DO_SOFTIRQ
#else
#define irq_ctx_init()
#endif /* CONFIG_IRQSTACKS */
extern void do_IRQ(struct pt_regs *regs);
#endif /* _ASM_IRQ_H */
#endif /* __KERNEL__ */
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