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Annotation of sys/arch/arm/xscale/pxa2x0_intr.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: pxa2x0_intr.h,v 1.11 2007/05/19 15:47:16 miod Exp $ */
        !             2: /*     $NetBSD: pxa2x0_intr.h,v 1.4 2003/07/05 06:53:08 dogcow Exp $ */
        !             3:
        !             4: /* Derived from i80321_intr.h */
        !             5:
        !             6: /*
        !             7:  * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
        !             8:  * All rights reserved.
        !             9:  *
        !            10:  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
        !            11:  *
        !            12:  * Redistribution and use in source and binary forms, with or without
        !            13:  * modification, are permitted provided that the following conditions
        !            14:  * are met:
        !            15:  * 1. Redistributions of source code must retain the above copyright
        !            16:  *    notice, this list of conditions and the following disclaimer.
        !            17:  * 2. Redistributions in binary form must reproduce the above copyright
        !            18:  *    notice, this list of conditions and the following disclaimer in the
        !            19:  *    documentation and/or other materials provided with the distribution.
        !            20:  * 3. All advertising materials mentioning features or use of this software
        !            21:  *    must display the following acknowledgement:
        !            22:  *     This product includes software developed for the NetBSD Project by
        !            23:  *     Wasabi Systems, Inc.
        !            24:  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
        !            25:  *    or promote products derived from this software without specific prior
        !            26:  *    written permission.
        !            27:  *
        !            28:  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
        !            29:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
        !            30:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
        !            31:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
        !            32:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
        !            33:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
        !            34:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
        !            35:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
        !            36:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
        !            37:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
        !            38:  * POSSIBILITY OF SUCH DAMAGE.
        !            39:  */
        !            40:
        !            41: #ifndef _PXA2X0_INTR_H_
        !            42: #define _PXA2X0_INTR_H_
        !            43:
        !            44: #define        ARM_IRQ_HANDLER _C_LABEL(pxa2x0_irq_handler)
        !            45:
        !            46: #ifndef _LOCORE
        !            47:
        !            48: #include <arm/armreg.h>
        !            49: #include <arm/cpufunc.h>
        !            50: #include <arm/softintr.h>
        !            51:
        !            52: extern vaddr_t pxaic_base;             /* Shared with pxa2x0_irq.S */
        !            53: #define read_icu(offset) (*(volatile uint32_t *)(pxaic_base+(offset)))
        !            54: #define write_icu(offset,value) \
        !            55:  (*(volatile uint32_t *)(pxaic_base+(offset))=(value))
        !            56:
        !            57: extern __volatile int current_spl_level;
        !            58: extern __volatile int softint_pending;
        !            59: extern int pxa2x0_imask[];
        !            60: void pxa2x0_do_pending(void);
        !            61:
        !            62: void pxa2x0_setipl(int new);
        !            63: void pxa2x0_splx(int new);
        !            64: int pxa2x0_splraise(int ipl);
        !            65: int pxa2x0_spllower(int ipl);
        !            66: void pxa2x0_setsoftintr(int si);
        !            67:
        !            68:
        !            69: /*
        !            70:  * An useful function for interrupt handlers.
        !            71:  * XXX: This shouldn't be here.
        !            72:  */
        !            73: static __inline int
        !            74: find_first_bit( uint32_t bits )
        !            75: {
        !            76:        int count;
        !            77:
        !            78:        /* since CLZ is available only on ARMv5, this isn't portable
        !            79:         * to all ARM CPUs.  This file is for PXA2[15]0 processor.
        !            80:         */
        !            81:        asm( "clz %0, %1" : "=r" (count) : "r" (bits) );
        !            82:        return 31-count;
        !            83: }
        !            84:
        !            85:
        !            86: int    _splraise(int);
        !            87: int    _spllower(int);
        !            88: void   splx(int);
        !            89: void   _setsoftintr(int);
        !            90:
        !            91: /*
        !            92:  * This function *MUST* be called very early on in a port's
        !            93:  * initarm() function, before ANY spl*() functions are called.
        !            94:  *
        !            95:  * The parameter is the virtual address of the PXA2x0's Interrupt
        !            96:  * Controller registers.
        !            97:  */
        !            98: void pxa2x0_intr_bootstrap(vaddr_t);
        !            99:
        !           100: void pxa2x0_irq_handler(void *);
        !           101: void *pxa2x0_intr_establish(int irqno, int level, int (*func)(void *),
        !           102:     void *cookie, char *name);
        !           103: void pxa2x0_intr_disestablish(void *cookie);
        !           104: const char *pxa2x0_intr_string(void *cookie);
        !           105:
        !           106: #ifdef DIAGNOSTIC
        !           107: /*
        !           108:  * Although this function is implemented in MI code, it must be in this MD
        !           109:  * header because we don't want this header to include MI includes.
        !           110:  */
        !           111: void splassert_fail(int, int, const char *);
        !           112: extern int splassert_ctl;
        !           113: void pxa2x0_splassert_check(int, const char *);
        !           114: #define splassert(__wantipl) do {                              \
        !           115:        if (splassert_ctl > 0) {                                \
        !           116:                pxa2x0_splassert_check(__wantipl, __func__);    \
        !           117:        }                                                       \
        !           118: } while (0)
        !           119: #else
        !           120: #define        splassert(wantipl)      do { /* nothing */ } while (0)
        !           121: #endif
        !           122:
        !           123: #endif /* ! _LOCORE */
        !           124:
        !           125: #endif /* _PXA2X0_INTR_H_ */