The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/arm/arm/cpufunc_asm_ixp12x0.S

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    1 /*      $NetBSD: cpufunc_asm_ixp12x0.S,v 1.2 2002/08/17 16:36:31 thorpej Exp $  */
    2 
    3 /*-
    4  * Copyright (c) 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 
   39 #include <machine/asm.h>
   40 __FBSDID("$FreeBSD: releng/10.0/sys/arm/arm/cpufunc_asm_ixp12x0.S 248361 2013-03-16 02:48:49Z andrew $");
   41 
   42 /*
   43  * This function is the same as sa110_context_switch for now, the plan
   44  * is to make use of the process id register to avoid cache flushes.
   45  */
   46 ENTRY(ixp12x0_context_switch)
   47         /*
   48          * CF_CACHE_PURGE_ID will *ALWAYS* be called prior to this.
   49          * Thus the data cache will contain only kernel data and the
   50          * instruction cache will contain only kernel code, and all
   51          * kernel mappings are shared by all processes.
   52          */
   53 
   54         /* Write the TTB */
   55         mcr     p15, 0, r0, c2, c0, 0
   56 
   57         /* If we have updated the TTB we must flush the TLB */
   58         mcr     p15, 0, r0, c8, c7, 0   /* flush the I+D tlb */
   59 
   60         /* Make sure that pipeline is emptied */
   61         mov     r0, r0
   62         mov     r0, r0
   63         RET
   64 END(ixp12x0_context_switch)
   65 
   66 ENTRY(ixp12x0_drain_readbuf)
   67         mcr     p15, 0, r0, c9, c0, 0           /* drain read buffer */
   68         RET
   69 END(ixp12x0_drain_readbuf)
   70 
   71 /*
   72  * Information for the IXP12X0 cache clean/purge functions:
   73  *
   74  *      * Virtual address of the memory region to use
   75  *      * Size of memory region
   76  */
   77         .data
   78 
   79         .global _C_LABEL(ixp12x0_cache_clean_addr)
   80 _C_LABEL(ixp12x0_cache_clean_addr):
   81         .word   0xf0000000
   82 
   83         .global _C_LABEL(ixp12x0_cache_clean_size)
   84 _C_LABEL(ixp12x0_cache_clean_size):
   85         .word   0x00008000
   86 
   87         .text
   88 
   89 .Lixp12x0_cache_clean_addr:
   90         .word   _C_LABEL(ixp12x0_cache_clean_addr)
   91 .Lixp12x0_cache_clean_size:
   92         .word   _C_LABEL(ixp12x0_cache_clean_size)

Cache object: 050ee8ef34acdf79fce85b6db8a1f703


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