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