FreeBSD/Linux Kernel Cross Reference
sys/arm/include/sysarch.h

     /*      $NetBSD: sysarch.h,v 1.5 2003/09/11 09:40:12 kleink Exp $       */
     
     /*-
      * SPDX-License-Identifier: BSD-4-Clause
      *
      * Copyright (c) 1996-1997 Mark Brinicombe.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Mark Brinicombe.
     * 4. The name of the company nor the name of the author may be used to
     *    endorse or promote products derived from this software without specific
     *    prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
     * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    /* $FreeBSD$ */
    
    #ifndef _ARM_SYSARCH_H_
    #define _ARM_SYSARCH_H_
    
    #include <machine/armreg.h>
    
    /*
     * The ARM_TP_ADDRESS points to a special purpose page, which is used as local
     * store for the ARM per-thread data and Restartable Atomic Sequences support.
     * Put it just above the "high" vectors' page.
     * The cpu_switch() code assumes ARM_RAS_START is ARM_TP_ADDRESS + 4, and
     * ARM_RAS_END is ARM_TP_ADDRESS + 8, so if that ever changes, be sure to
     * update the cpu_switch() (and cpu_throw()) code as well.
     * In addition, code in arm/include/atomic.h and arm/arm/exception.S
     * assumes that ARM_RAS_END is at ARM_RAS_START+4, so be sure to update those
     * if ARM_RAS_END moves in relation to ARM_RAS_START (look for occurrences
     * of ldr/str rm,[rn, #4]).
     */
    
    /* ARM_TP_ADDRESS is needed for processors that don't support
     * the exclusive-access opcodes introduced with ARMv6K. */
    #if __ARM_ARCH <= 5
    #define ARM_TP_ADDRESS          (ARM_VECTORS_HIGH + 0x1000)
    #define ARM_RAS_START           (ARM_TP_ADDRESS + 4)
    #define ARM_RAS_END             (ARM_TP_ADDRESS + 8)
    #endif
    
    #ifndef LOCORE
    #ifndef __ASSEMBLER__
    
    /*
     * Pickup definition of various __types.
     */
    #include <sys/_types.h>
    
    /*
     * Architecture specific syscalls (arm)
     */
    
    #define ARM_SYNC_ICACHE         0
    #define ARM_DRAIN_WRITEBUF      1
    #define ARM_SET_TP              2
    #define ARM_GET_TP              3
    #define ARM_GET_VFPSTATE        4
    
    struct arm_sync_icache_args {
            __uintptr_t     addr;           /* Virtual start address */
            __size_t        len;            /* Region size */
    };
    
    struct arm_get_vfpstate_args {
            __size_t        mc_vfp_size;
            void            *mc_vfp;
    };
    
    #ifndef _KERNEL
    __BEGIN_DECLS
    int     arm_sync_icache(unsigned int, int);
    int     arm_drain_writebuf(void);
    int     sysarch(int, void *);
    __END_DECLS
    #endif
   
   #endif /* __ASSEMBLER__ */
   #endif /* LOCORE */
   
   #endif /* !_ARM_SYSARCH_H_ */

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