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/*
* linux/kernel/softirq.c
*
* Copyright (C) 1992 Linus Torvalds
*
* do_bottom_half() runs at normal kernel priority: all interrupts
* enabled. do_bottom_half() is atomic with respect to itself: a
* bottom_half handler need not be re-entrant.
*/
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/kernel_stat.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/mm.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/bitops.h>
unsigned int intr_count = 0;
int bh_mask_count[32];
unsigned int bh_active = 0;
unsigned int bh_mask = 0;
void (*bh_base[32])(void);
asmlinkage void do_bottom_half(void)
{
unsigned int active;
unsigned int mask, left;
void (**bh)(void);
sti();
bh = bh_base;
active = bh_active & bh_mask;
for (mask = 1, left = ~0 ; left & active ; bh++,mask += mask,left += left) {
if (mask & active) {
void (*fn)(void);
bh_active &= ~mask;
fn = *bh;
if (!fn)
goto bad_bh;
fn();
}
}
return;
bad_bh:
printk ("irq.c:bad bottom half entry %08lx\n", mask);
}
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