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/*
* linux/include/asm-arm/arch-arc/irq.h
*
* Copyright (C) 1996 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Changelog:
* 24-09-1996 RMK Created
* 10-10-1996 RMK Brought up to date with arch-sa110eval
* 22-10-1996 RMK Changed interrupt numbers & uses new inb/outb macros
* 11-01-1998 RMK Added mask_and_ack_irq
* 22-08-1998 RMK Restructured IRQ routines
*/
#include <linux/config.h>
#include <asm/hardware/ioc.h>
#include <asm/io.h>
#ifdef CONFIG_ARCH_ARC
#define a_clf() clf()
#define a_stf() stf()
#else
#define a_clf() do { } while (0)
#define a_stf() do { } while (0)
#endif
#define fixup_irq(x) (x)
static void arc_mask_irq_ack_a(unsigned int irq)
{
unsigned int val, mask;
mask = 1 << irq;
a_clf();
val = ioc_readb(IOC_IRQMASKA);
ioc_writeb(val & ~mask, IOC_IRQMASKA);
ioc_writeb(mask, IOC_IRQCLRA);
a_stf();
}
static void arc_mask_irq_a(unsigned int irq)
{
unsigned int val, mask;
mask = 1 << irq;
a_clf();
val = ioc_readb(IOC_IRQMASKA);
ioc_writeb(val & ~mask, IOC_IRQMASKA);
a_stf();
}
static void arc_unmask_irq_a(unsigned int irq)
{
unsigned int val, mask;
mask = 1 << irq;
a_clf();
val = ioc_readb(IOC_IRQMASKA);
ioc_writeb(val | mask, IOC_IRQMASKA);
a_stf();
}
static void arc_mask_irq_b(unsigned int irq)
{
unsigned int val, mask;
mask = 1 << (irq & 7);
val = ioc_readb(IOC_IRQMASKB);
ioc_writeb(val & ~mask, IOC_IRQMASKB);
}
static void arc_unmask_irq_b(unsigned int irq)
{
unsigned int val, mask;
mask = 1 << (irq & 7);
val = ioc_readb(IOC_IRQMASKB);
ioc_writeb(val | mask, IOC_IRQMASKB);
}
static void arc_mask_irq_fiq(unsigned int irq)
{
unsigned int val, mask;
mask = 1 << (irq & 7);
val = ioc_readb(IOC_FIQMASK);
ioc_writeb(val & ~mask, IOC_FIQMASK);
}
static void arc_unmask_irq_fiq(unsigned int irq)
{
unsigned int val, mask;
mask = 1 << (irq & 7);
val = ioc_readb(IOC_FIQMASK);
ioc_writeb(val | mask, IOC_FIQMASK);
}
static __inline__ void irq_init_irq(void)
{
int irq;
ioc_writeb(0, IOC_IRQMASKA);
ioc_writeb(0, IOC_IRQMASKB);
ioc_writeb(0, IOC_FIQMASK);
for (irq = 0; irq < NR_IRQS; irq++) {
switch (irq) {
case 0 ... 6:
irq_desc[irq].probe_ok = 1;
irq_desc[irq].valid = 1;
irq_desc[irq].mask_ack = arc_mask_irq_ack_a;
irq_desc[irq].mask = arc_mask_irq_a;
irq_desc[irq].unmask = arc_unmask_irq_a;
break;
case 7:
irq_desc[irq].noautoenable = 1;
irq_desc[irq].valid = 1;
irq_desc[irq].mask_ack = arc_mask_irq_ack_a;
irq_desc[irq].mask = arc_mask_irq_a;
irq_desc[irq].unmask = arc_unmask_irq_a;
break;
case 9 ... 15:
irq_desc[irq].probe_ok = 1;
case 8:
irq_desc[irq].valid = 1;
irq_desc[irq].mask_ack = arc_mask_irq_b;
irq_desc[irq].mask = arc_mask_irq_b;
irq_desc[irq].unmask = arc_unmask_irq_b;
break;
case 64 ... 72:
irq_desc[irq].valid = 1;
irq_desc[irq].mask_ack = arc_mask_irq_fiq;
irq_desc[irq].mask = arc_mask_irq_fiq;
irq_desc[irq].unmask = arc_unmask_irq_fiq;
break;
}
}
irq_desc[IRQ_KEYBOARDTX].noautoenable = 1;
init_FIQ();
}
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