| 0,0 → 1,85 |
|---|
| /* |
| * Copyright (C) 2006 Ondrej Palkovsky |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| |
| #include <arch/asm.h> |
| #include <arch/drivers/pic.h> |
| #include <byteorder.h> |
| #include <bitops.h> |
| |
| static volatile __u32 *pic; |
| |
| void pic_init(void) |
| { |
| pic = (__u32 *)hw_map(PIC_HW_ADDR, PAGE_SIZE); |
| } |
| |
| |
| |
| void pic_enable_interrupt(int intnum) |
| { |
| if (intnum < 32) { |
| pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] | (1 << intnum); |
| } else { |
| pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] | (1 << (intnum-32)); |
| } |
| |
| } |
| |
| void pic_disable_interrupt(int intnum) |
| { |
| if (intnum < 32) { |
| pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] & (~(1 << intnum)); |
| } else { |
| pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] & (~(1 << (intnum-32))); |
| } |
| } |
| |
| void pic_ack_interrupt(int intnum) |
| { |
| if (intnum < 32) |
| pic[PIC_ACK_LOW] = 1 << intnum; |
| else |
| pic[PIC_ACK_HIGH] = 1 << (intnum-32); |
| } |
| |
| /** Return number of pending interrupt */ |
| int pic_get_pending(void) |
| { |
| int pending; |
| |
| pending = pic[PIC_PENDING_LOW]; |
| if (pending) { |
| return fnzb32(pending); |
| } |
| pending = pic[PIC_PENDING_HIGH]; |
| if (pending) { |
| return fnzb32(pending) + 32; |
| } |
| return -1; |
| } |