| #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 <asm/atomic.h> |
| |
| extern void disable_irq(unsigned int); |
| extern void disable_irq_nosync(unsigned int); |
| extern void enable_irq(unsigned int); |
| |
| /* Need to keep at 256 (minimum) for iSeries */ |
| #define NR_IRQS 256 |
| |
| #define MAX_IRQS (1<<24) |
| |
| extern unsigned int _next_irq(unsigned int irq); |
| |
| /* Define a way to iterate across irqs fairly efficiently. */ |
| #define for_each_irq(i) \ |
| for ((i) = 0; (i) < MAX_IRQS; (i) = _next_irq(i)) |
| |
| |
| extern void *_irqdesc(unsigned int irq); |
| extern void *_real_irqdesc(unsigned int irq); |
| #define irqdesc(irq) ((irq_desc_t *)_irqdesc(irq)) |
| #define real_irqdesc(irq) ((irq_desc_t *)_real_irqdesc(irq)) |
| |
| /* |
| * 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. |
| */ |
| static __inline__ int irq_cannonicalize(int irq) |
| { |
| return 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. |
| * |
| * This would be nice to remove at some point as it adds confusion |
| * and adds a nasty end case if any platform native interrupts have |
| * values within 0x10 of the end of that namespace. |
| */ |
| |
| #define NUM_ISA_INTERRUPTS 0x10 |
| |
| extern inline int irq_offset_up(int irq) |
| { |
| return(irq + NUM_ISA_INTERRUPTS); |
| } |
| |
| extern inline int irq_offset_down(int irq) |
| { |
| return(irq - NUM_ISA_INTERRUPTS); |
| } |
| |
| extern inline int irq_offset_value(void) |
| { |
| return NUM_ISA_INTERRUPTS; |
| } |
| |
| #endif /* _ASM_IRQ_H */ |
| #endif /* __KERNEL__ */ |