1bcb7a339a
Change the PIC driver to be initialized by the init system. To be initialized by the init system the function signature of the _i8259_init() function needs to be changed to the standard *_init() function signature specified by the device model. Change-Id: I63bf1cd0ce78920fa20da94f5966e5aab4bf41b2 Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/* i8259.c - Disable Intel 8259A PIC (Programmable Interrupt Controller) */
|
|
|
|
/*
|
|
* Copyright (c) 2010-2015 Wind River Systems, Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1) Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
*
|
|
* 2) 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.
|
|
*
|
|
* 3) Neither the name of Wind River Systems nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software without
|
|
* specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.
|
|
*/
|
|
|
|
/*
|
|
DESCRIPTION
|
|
This module disables the Intel 8259A PIC (Programmable Interrupt Controller)
|
|
to prevent it from generating spurious interrupts.
|
|
*/
|
|
|
|
|
|
#include <nanokernel.h>
|
|
#include <arch/cpu.h>
|
|
#include <toolchain.h>
|
|
#include <sections.h>
|
|
#include <device.h>
|
|
|
|
#include <drivers/pic.h>
|
|
#include <board.h>
|
|
|
|
#define PIC_DISABLE 0xff /* Disable PIC command */
|
|
|
|
/**
|
|
*
|
|
* @brief Initialize the Intel 8259A PIC device driver
|
|
*
|
|
* This routine disables the 8259A PIC device to prevent it from
|
|
* generating spurious interrupts.
|
|
*
|
|
* @return N/A
|
|
*/
|
|
|
|
int _i8259_init(struct device *unused)
|
|
{
|
|
ARG_UNUSED(unused);
|
|
sys_out8(PIC_DISABLE, PIC_PORT2(PIC_SLAVE_BASE_ADRS));
|
|
sys_out8(PIC_DISABLE, PIC_PORT2(PIC_MASTER_BASE_ADRS));
|
|
return 0;
|
|
}
|