Return to sa11x0_intr.h CVS log

Up to [local] / sys / arch / arm / sa11x0

Annotation of sys/arch/arm/sa11x0/sa11x0_intr.h, Revision 1.1.1.1

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 _SA11X0_INTR_H_
                     42: #define _SA11X0_INTR_H_
                     43:
                     44: #define        ARM_IRQ_HANDLER _C_LABEL(sa11x0_irq_handler)
                     45:
                     46: #ifndef _LOCORE
                     47:
                     48: #include <arm/armreg.h>
                     49: #include <arm/cpufunc.h>
                     50: #include <arm/softintr.h>
                     51:
                     52: #include <arm/sa11x0/sa11x0_var.h>
                     53: extern vaddr_t saic_base;
                     54:
                     55: /*
                     56:  * Macross to read/write to memory-mapped ICU.
                     57:  */
                     58: #define read_icu(offset) (*(volatile uint32_t *)(saic_base+(offset)))
                     59: #define write_icu(offset,value) \
                     60:  (*(volatile uint32_t *)(saic_base+(offset))=(value))
                     61:
                     62: extern __volatile int current_spl_level;
                     63: extern __volatile int softint_pending;
                     64: extern int sa11x0_imask[];
                     65: void sa11x0_do_pending(void);
                     66:
                     67: void sa11x0_setipl(int new);
                     68: void sa11x0_splx(int new);
                     69: int sa11x0_splraise(int ipl);
                     70: int sa11x0_spllower(int ipl);
                     71: void sa11x0_setsoftintr(int si);
                     72:
                     73:
                     74: /*
                     75:  * An useful function for interrupt handlers.
                     76:  * XXX: This shouldn't be here.
                     77:  */
                     78: static __inline int
                     79: find_first_bit( uint32_t bits )
                     80: {
                     81:        int count;
                     82:        uint32_t mask;
                     83:
                     84:        /*
                     85:         * If we weren't ARMv4 then we would use CLZ insn here (ARMv5 and above).
                     86:         * Since our CPU is SA1 which is ARMv4 we implement this in software.
                     87:         * TODO optimize code.
                     88:         */
                     89:        count = 0;
                     90:        mask = 1 << 31; /* we start from MSB */
                     91:        for (; mask > 0; mask >>= 1)
                     92:                if (bits & mask)
                     93:                        break;
                     94:                else
                     95:                        count++;
                     96:
                     97:        return 31 - count;
                     98: }
                     99:
                    100:
                    101: int    _splraise(int);
                    102: int    _spllower(int);
                    103: void   splx(int);
                    104: void   _setsoftintr(int);
                    105:
                    106: /*
                    107:  * This function *MUST* be called very early on in a port's
                    108:  * initarm() function, before ANY spl*() functions are called.
                    109:  *
                    110:  * The parameter is the virtual address of the SA11x0's Interrupt
                    111:  * Controller registers.
                    112:  */
                    113: void sa11x0_intr_bootstrap(vaddr_t);
                    114:
                    115: void sa11x0_irq_handler(void *);
                    116: void * sa11x0_intr_establish(sa11x0_chipset_tag_t ic, int irq, int type, int level,
                    117:     int (*ih_fun)(void *), void *ih_arg, char *name);
                    118: #if 0
                    119: void *sa11x0_intr_establish(int irqno, int level, int (*func)(void *),
                    120:     void *cookie, char *name);
                    121: #endif
                    122: void sa11x0_intr_disestablish(void *cookie);
                    123: const char *sa11x0_intr_string(void *cookie);
                    124:
                    125: #ifdef DIAGNOSTIC
                    126: /*
                    127:  * Although this function is implemented in MI code, it must be in this MD
                    128:  * header because we don't want this header to include MI includes.
                    129:  */
                    130: void splassert_fail(int, int, const char *);
                    131: extern int splassert_ctl;
                    132: void sa11x0_splassert_check(int, const char *);
                    133: #define splassert(__wantipl) do {                              \
                    134:        if (splassert_ctl > 0) {                                \
                    135:                sa11x0_splassert_check(__wantipl, __func__);    \
                    136:        }                                                       \
                    137: } while (0)
                    138: #else
                    139: #define        splassert(wantipl)      do { /* nothing */ } while (0)
                    140: #endif
                    141:
                    142: #endif /* ! _LOCORE */
                    143:
                    144: #endif /* _SA11X0_INTR_H_ */