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https://github.com/zephyrproject-rtos/zephyr
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f7fffae8aa
Change all the Intel and Wind River code license from BSD-3 to Apache 2. Change-Id: Id8be2c1c161a06ea8a0b9f38e17660e11dbb384b Signed-off-by: Javier B Perez Hernandez <javier.b.perez.hernandez@linux.intel.com> Signed-off-by: Anas Nashif <anas.nashif@intel.com> Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Benjamin Walsh <benjamin.walsh@windriver.com>
54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
/* i8259.c - Disable Intel 8259A PIC (Programmable Interrupt Controller) */
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/*
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* Copyright (c) 2010-2015 Wind River Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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DESCRIPTION
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This module disables the Intel 8259A PIC (Programmable Interrupt Controller)
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to prevent it from generating spurious interrupts.
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*/
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#include <nanokernel.h>
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#include <arch/cpu.h>
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#include <toolchain.h>
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#include <sections.h>
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#include <device.h>
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#include <drivers/pic.h>
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#include <board.h>
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#define PIC_DISABLE 0xff /* Disable PIC command */
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/**
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*
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* @brief Initialize the Intel 8259A PIC device driver
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*
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* This routine disables the 8259A PIC device to prevent it from
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* generating spurious interrupts.
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*
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* @return N/A
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*/
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int _i8259_init(struct device *unused)
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{
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ARG_UNUSED(unused);
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sys_out8(PIC_DISABLE, PIC_PORT2(PIC_SLAVE_BASE_ADRS));
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sys_out8(PIC_DISABLE, PIC_PORT2(PIC_MASTER_BASE_ADRS));
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return 0;
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}
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