intc.h

   1 /*      $OpenBSD: intc.h,v 1.2 2014/03/29 18:09:28 guenther Exp $ */
   2 /*
   3  * Copyright (c) 2007,2009 Dale Rahn <drahn@openbsd.org>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #ifndef _OMAPINTC_INTR_H_
  19 #define _OMAPINTC_INTR_H_
  20
  21 #ifndef _LOCORE
  22
  23 #include <arm/armreg.h>
  24 #include <arm/cpufunc.h>
  25 #include <machine/intr.h>
  26 #include <arm/softintr.h>
  27
  28 extern volatile int current_spl_level;
  29 extern volatile int softint_pending;
  30 void intc_do_pending(void);
  31
  32 #define SI_TO_IRQBIT(si)  (1U<<(si))
  33 void intc_setipl(int new);
  34 void intc_splx(int new);
  35 int intc_splraise(int ipl);
  36 int intc_spllower(int ipl);
  37 void intc_setsoftintr(int si);
  38
  39 /*
  40  * An useful function for interrupt handlers.
  41  * XXX: This shouldn't be here.
  42  */
  43 static __inline int
  44 find_first_bit( uint32_t bits )
  45 {
  46         int count;
  47
  48         /* since CLZ is available only on ARMv5, this isn't portable
  49          * to all ARM CPUs.  This file is for OMAPINTC processor.
  50          */
  51         asm( "clz %0, %1" : "=r" (count) : "r" (bits) );
  52         return 31-count;
  53 }
  54
  55
  56 /*
  57  * This function *MUST* be called very early on in a port's
  58  * initarm() function, before ANY spl*() functions are called.
  59  *
  60  * The parameter is the virtual address of the OMAPINTC's Interrupt
  61  * Controller registers.
  62  */
  63 void intc_intr_bootstrap(vaddr_t);
  64
  65 void intc_irq_handler(void *);
  66 void *intc_intr_establish(int irqno, int level, int (*func)(void *),
  67     void *cookie, char *name);
  68 void intc_intr_disestablish(void *cookie);
  69 const char *intc_intr_string(void *cookie);
  70
  71 #endif /* ! _LOCORE */
  72
  73 #endif /* _OMAPINTC_INTR_H_ */
  74