Home | History | Annotate | Line # | Download | only in xscale 
      1 /*	$NetBSD: ixp425_intr.h,v 1.11 2023/08/01 10:35:42 rin Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed for the NetBSD Project by
     20  *	Wasabi Systems, Inc.
     21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  *    or promote products derived from this software without specific prior
     23  *    written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 #ifndef _IXP425_INTR_H_
     39 #define _IXP425_INTR_H_
     40 
     41 #define	ARM_IRQ_HANDLER	_C_LABEL(ixp425_intr_dispatch)
     42 
     43 #ifndef _LOCORE
     44 
     45 #include <arm/cpu.h>
     46 #include <arm/armreg.h>
     47 #include <arm/cpufunc.h>
     48 
     49 #include <arm/xscale/ixp425reg.h>
     50 
     51 #define IXPREG(reg)     *((volatile uint32_t*) (reg))
     52 
     53 static inline void __attribute__((__unused__))
     54 ixp425_set_intrmask(void)
     55 {
     56 	extern volatile uint32_t intr_enabled;
     57 
     58 	IXPREG(IXP425_INT_ENABLE) = intr_enabled & IXP425_INT_HWMASK;
     59 }
     60 
     61 static inline void __attribute__((__unused__))
     62 ixp425_splx(int ipl)
     63 {
     64 	extern int ixp425_imask[];
     65 	extern volatile uint32_t intr_enabled;
     66 	extern volatile int ixp425_ipending;
     67 	int oldirqstate, hwpend;
     68 
     69 	/* Don't let the compiler re-order this code with preceding code */
     70 	__insn_barrier();
     71 
     72 	set_curcpl(ipl);
     73 
     74 	hwpend = (ixp425_ipending & IXP425_INT_HWMASK) & ~ixp425_imask[ipl];
     75 	if (hwpend != 0) {
     76 		oldirqstate = disable_interrupts(I32_bit);
     77 		intr_enabled |= hwpend;
     78 		ixp425_set_intrmask();
     79 		restore_interrupts(oldirqstate);
     80 	}
     81 
     82 #ifdef __HAVE_FAST_SOFTINTS
     83 	cpu_dosoftints();
     84 #endif
     85 }
     86 
     87 static inline int __attribute__((__unused__))
     88 ixp425_splraise(int ipl)
     89 {
     90 	int old = curcpl();
     91 
     92 	if (ipl <= old)
     93 		return (old);
     94 
     95 	set_curcpl(ipl);
     96 
     97 	/* Don't let the compiler re-order this code with subsequent code */
     98 	__insn_barrier();
     99 
    100 	return (old);
    101 }
    102 
    103 static inline int __attribute__((__unused__))
    104 ixp425_spllower(int ipl)
    105 {
    106 	int old = curcpl();
    107 	ixp425_splx(ipl);
    108 	return(old);
    109 }
    110 
    111 #if !defined(EVBARM_SPL_NOINLINE)
    112 
    113 #define splx(new)		ixp425_splx(new)
    114 #define	_spllower(ipl)		ixp425_spllower(ipl)
    115 #define	_splraise(ipl)		ixp425_splraise(ipl)
    116 
    117 #else
    118 
    119 int	_splraise(int);
    120 int	_spllower(int);
    121 void	splx(int);
    122 
    123 #endif /* ! EVBARM_SPL_NOINLINE */
    124 
    125 #endif /* _LOCORE */
    126 
    127 #endif /* _IXP425_INTR_H_ */
    128