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i80321_intr.h revision 1.7 
      1 /*	$NetBSD: i80321_intr.h,v 1.7 2005/12/24 20:06:52 perry 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 _I80321_INTR_H_
     39 #define _I80321_INTR_H_
     40 
     41 #define	ARM_IRQ_HANDLER	_C_LABEL(i80321_intr_dispatch)
     42 
     43 #ifndef _LOCORE
     44 
     45 #include <arm/armreg.h>
     46 #include <arm/cpufunc.h>
     47 
     48 #include <arm/xscale/i80321reg.h>
     49 
     50 void i80321_do_pending(void);
     51 
     52 static inline void __attribute__((__unused__))
     53 i80321_set_intrmask(void)
     54 {
     55 	extern volatile uint32_t intr_enabled;
     56 
     57 	__asm volatile("mcr p6, 0, %0, c0, c0, 0"
     58 		:
     59 		: "r" (intr_enabled & ICU_INT_HWMASK));
     60 }
     61 
     62 #define INT_SWMASK                                                      \
     63         ((1U << ICU_INT_bit26) | (1U << ICU_INT_bit22) |                \
     64          (1U << ICU_INT_bit5)  | (1U << ICU_INT_bit4))
     65 
     66 static inline void __attribute__((__unused__))
     67 i80321_splx(int new)
     68 {
     69 	extern volatile uint32_t intr_enabled;
     70 	extern volatile int current_spl_level;
     71 	extern volatile int i80321_ipending;
     72 	extern void i80321_do_pending(void);
     73 	int oldirqstate, hwpend;
     74 
     75 	/* Don't let the compiler re-order this code with preceding code */
     76 	__insn_barrier();
     77 
     78 	current_spl_level = new;
     79 
     80 	hwpend = (i80321_ipending & ICU_INT_HWMASK) & ~new;
     81 	if (hwpend != 0) {
     82 		oldirqstate = disable_interrupts(I32_bit);
     83 		intr_enabled |= hwpend;
     84 		i80321_set_intrmask();
     85 		restore_interrupts(oldirqstate);
     86 	}
     87 
     88 	if ((i80321_ipending & INT_SWMASK) & ~new)
     89 		i80321_do_pending();
     90 }
     91 
     92 static inline int __attribute__((__unused__))
     93 i80321_splraise(int ipl)
     94 {
     95 	extern volatile int current_spl_level;
     96 	extern int i80321_imask[];
     97 	int	old;
     98 
     99 	old = current_spl_level;
    100 	current_spl_level |= i80321_imask[ipl];
    101 
    102 	/* Don't let the compiler re-order this code with subsequent code */
    103 	__insn_barrier();
    104 
    105 	return (old);
    106 }
    107 
    108 static inline int __attribute__((__unused__))
    109 i80321_spllower(int ipl)
    110 {
    111 	extern volatile int current_spl_level;
    112 	extern int i80321_imask[];
    113 	int old = current_spl_level;
    114 
    115 	i80321_splx(i80321_imask[ipl]);
    116 	return(old);
    117 }
    118 
    119 #if !defined(EVBARM_SPL_NOINLINE)
    120 
    121 #define splx(new)		i80321_splx(new)
    122 #define	_spllower(ipl)		i80321_spllower(ipl)
    123 #define	_splraise(ipl)		i80321_splraise(ipl)
    124 void	_setsoftintr(int);
    125 
    126 #else
    127 
    128 int	_splraise(int);
    129 int	_spllower(int);
    130 void	splx(int);
    131 void	_setsoftintr(int);
    132 
    133 #endif /* ! EVBARM_SPL_NOINLINE */
    134 
    135 #endif /* _LOCORE */
    136 
    137 #endif /* _I80321_INTR_H_ */
    138