/*
   * 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/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__ */