Commit 1b92313d authored by Paul Mackerras's avatar Paul Mackerras

powerpc: Merge asm/irq.h

Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 76f9f87f
#ifdef __KERNEL__
#ifndef _ASM_IRQ_H
#define _ASM_IRQ_H
#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 <asm/machdep.h> /* ppc_md */
#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
......@@ -30,6 +42,44 @@
#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>
......@@ -72,11 +122,6 @@
#define NR_UIC_IRQS UIC_WIDTH
#define NR_IRQS ((NR_UIC_IRQS * NR_UICS) + NR_BOARD_IRQS)
#endif
static __inline__ int
irq_canonicalize(int irq)
{
return (irq);
}
#elif defined(CONFIG_44x)
#include <asm/ibm44x.h>
......@@ -84,12 +129,6 @@ irq_canonicalize(int irq)
#define NR_UIC_IRQS 32
#define NR_IRQS ((NR_UIC_IRQS * NR_UICS) + NR_BOARD_IRQS)
static __inline__ int
irq_canonicalize(int irq)
{
return (irq);
}
#elif defined(CONFIG_8xx)
/* Now include the board configuration specific associations.
......@@ -176,20 +215,9 @@ irq_canonicalize(int irq)
*/
#define mk_int_int_mask(IL) (1 << (7 - (IL/2)))
/* always the same on 8xx -- Cort */
static __inline__ int irq_canonicalize(int irq)
{
return irq;
}
#elif defined(CONFIG_83xx)
#include <asm/mpc83xx.h>
static __inline__ int irq_canonicalize(int irq)
{
return irq;
}
#define NR_IRQS (NR_IPIC_INTS)
#elif defined(CONFIG_85xx)
......@@ -313,17 +341,13 @@ static __inline__ int irq_canonicalize(int irq)
#define SIU_INT_PC1 ((uint)0x3e+CPM_IRQ_OFFSET)
#define SIU_INT_PC0 ((uint)0x3f+CPM_IRQ_OFFSET)
static __inline__ int irq_canonicalize(int irq)
{
return irq;
}
#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
......@@ -400,25 +424,77 @@ static __inline__ int irq_canonicalize(int irq)
#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;
#endif
/*
* This gets called from serial.c, which is now used on
* powermacs as well as prep/chrp boxes.
* Prep and chrp both have cascaded 8259 PICs.
* 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_md.irq_canonicalize)
return ppc_md.irq_canonicalize(irq);
if (ppc_do_canonicalize_irqs && irq == 2)
irq = 9;
return irq;
}
#endif
extern int distribute_irqs;
#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;
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 */
#endif /* _ASM_IRQ_H */
#endif /* __KERNEL__ */
#ifdef __KERNEL__
#ifndef _ASM_IRQ_H
#define _ASM_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>
/*
* Maximum number of interrupt sources that we can handle.
*/
#define NR_IRQS 512
/* 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))
/* 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);
/*
* 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;
}
static __inline__ int irq_canonicalize(int irq)
{
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 */
#endif /* _ASM_IRQ_H */
#endif /* __KERNEL__ */
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