asm_octeon.S

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    1 /*-
    2  * Copyright (c) 2004-2010 Juli Mallett <jmallett@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/11.0/sys/mips/cavium/asm_octeon.S 226018 2011-10-04 17:49:19Z marcel $
   27  */
   28 
   29 #include <machine/asm.h>
   30 
   31         .set noreorder
   32 
   33 #ifdef SMP
   34 /*
   35  * This function must be implemented in assembly because it is called early
   36  * in AP boot without a valid stack.
   37  */
   38 LEAF(platform_processor_id)
   39         .set push
   40         .set mips32r2
   41         jr      ra
   42         rdhwr   v0, $0
   43         .set pop
   44 END(platform_processor_id)
   45 
   46 /*
   47  * Called on APs to wait until they are told to launch.
   48  */
   49 LEAF(octeon_ap_wait)
   50         jal     platform_processor_id
   51         nop
   52 
   53 1:      ll      t0, octeon_ap_boot
   54         bne     v0, t0, 1b
   55         nop
   56 
   57         move    t0, zero
   58         sc      t0, octeon_ap_boot
   59 
   60         beqz    t0, 1b
   61         nop
   62 
   63         j       mpentry
   64         nop
   65 END(octeon_ap_wait)
   66 #endif

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FreeBSD/Linux Kernel Cross Reference sys/mips/cavium/asm_octeon.S

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sys/mips/cavium/asm_octeon.S