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[/] [or1k/] [trunk/] [uclinux/] [uClinux-2.0.x/] [kernel/] [softirq.c] - Rev 656
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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 long intr_count = 0; int bh_mask_count[32]; unsigned long bh_active = 0; unsigned long bh_mask = 0; void (*bh_base[32])(void); asmlinkage void do_bottom_half(void) { unsigned long active; unsigned long 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(); } } /* SIMON: forbidden change of source file - execution error */ cli(); return; bad_bh: printk ("irq.c:bad bottom half entry %08lx\n", mask); /* SIMON: forbidden change of source file - execution error */ cli(); }
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