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Annotation of Gnu-Mach/i386/i386at/gpl/linux/linux_soft.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Linux software interrupts.
                      3:  * Copyright (C) 1995 Shantanu Goel.
                      4:  *
                      5:  * This program is free software; you can redistribute it and/or modify
                      6:  * it under the terms of the GNU General Public License as published by
                      7:  * the Free Software Foundation; either version 2, or (at your option)
                      8:  * any later version.
                      9:  *
                     10:  * This program is distributed in the hope that it will be useful,
                     11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
                     12:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     13:  * GNU General Public License for more details.
                     14:  *
                     15:  * You should have received a copy of the GNU General Public License
                     16:  * along with this program; if not, write to the Free Software
                     17:  * Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
                     18:  */
                     19: 
                     20: /*
                     21:  *     linux/kernel/softirq.c
                     22:  *
                     23:  *     Copyright (C) 1992 Linus Torvalds
                     24:  */
                     25: 
                     26: #include <linux/sched.h>
                     27: #include <linux/interrupt.h>
                     28: #include <asm/system.h>
                     29: #include <asm/bitops.h>
                     30: 
                     31: /*
                     32:  * Mask of pending interrupts.
                     33:  */
                     34: unsigned long bh_active = 0;
                     35: 
                     36: /*
                     37:  * Mask of enabled interrupts.
                     38:  */
                     39: unsigned long bh_mask = 0;
                     40: 
                     41: /*
                     42:  * List of software interrupt handlers.
                     43:  */
                     44: struct bh_struct bh_base[32];
                     45: 
                     46: 
                     47: /*
                     48:  * Software interrupt handler.
                     49:  */
                     50: void
                     51: linux_soft_intr()
                     52: {
                     53:        unsigned long active;
                     54:        unsigned long mask, left;
                     55:        struct bh_struct *bh;
                     56: 
                     57:        bh = bh_base;
                     58:        active = bh_active & bh_mask;
                     59:        for (mask = 1, left = ~0;
                     60:             left & active; bh++, mask += mask, left += left) {
                     61:                if (mask & active) {
                     62:                        void (*fn)(void *);
                     63: 
                     64:                        bh_active &= ~mask;
                     65:                        fn = bh->routine;
                     66:                        if (fn == 0)
                     67:                                goto bad_bh;
                     68:                        (*fn)(bh->data);
                     69:                }
                     70:        }
                     71:        return;
                     72:  bad_bh:
                     73:        printf("linux_soft_intr: bad interrupt handler entry 0x%08lx\n", mask);
                     74: }

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