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/*
* include/asm-ppc/ppc4xx_pic.h
*
* Interrupt controller driver for PowerPC 4xx-based processors.
*
* Copyright (c) 1999 Grant Erickson <grant@lcse.umn.edu>
*
* Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
* Copyright (c) 2004 Zultys Technologies
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#ifndef __PPC4XX_PIC_H__
#define __PPC4XX_PIC_H__
#include <linux/config.h>
#include <linux/types.h>
#include <linux/irq.h>
/* "Fixed" UIC settings (they are chip, not board specific),
* e.g. polarity/triggerring for internal interrupt sources.
*
* Platform port should provide NR_UICS-sized array named ppc4xx_core_uic_cfg
* with these "fixed" settings: .polarity contains exact value which will
* be written (masked with "ext_irq_mask") into UICx_PR register,
* .triggering - to UICx_TR.
*
* Settings for external IRQs can be specified separately by the
* board support code. In this case properly sized array of unsigned
* char named ppc4xx_uic_ext_irq_cfg should be filled with correct
* values using IRQ_SENSE_XXXXX and IRQ_POLARITY_XXXXXXX defines.
*
* If these arrays aren't provided, UIC initialization code keeps firmware
* configuration. Also, ppc4xx_uic_ext_irq_cfg implies ppc4xx_core_uic_cfg
* is defined.
*
* Both ppc4xx_core_uic_cfg and ppc4xx_uic_ext_irq_cfg are declared as
* "weak" symbols in ppc4xx_pic.c
*
*/
struct ppc4xx_uic_settings {
u32 polarity;
u32 triggering;
u32 ext_irq_mask;
};
extern void ppc4xx_pic_init(void);
#endif /* __PPC4XX_PIC_H__ */
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