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/mv/armadaxp/mptramp.S

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    1 /*-
    2  * Copyright 2011 Semihalf
    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 
   27 #include <machine/asm.h>
   28 #include <machine/armreg.h>
   29 
   30 __FBSDID("$FreeBSD: stable/10/sys/arm/mv/armadaxp/mptramp.S 283340 2015-05-23 23:35:19Z ian $");
   31 
   32 .global _C_LABEL(mptramp_pmu_boot)
   33 
   34 ASENTRY_NP(mptramp)
   35         mov     r0, #0
   36         mcr     p15, 0, r0, c7, c7, 0
   37 
   38         mrs     r3, cpsr
   39         bic     r3, r3, #(PSR_MODE)
   40         orr     r3, r3, #(PSR_SVC32_MODE)
   41         msr     cpsr_fsxc, r3
   42 
   43         mrc     p15, 0, r0, c0, c0, 5
   44         and     r0, #0x0f               /* Get CPU ID */
   45 
   46         /* Read boot address for CPU */
   47         mov     r1, #0x100
   48         mul     r2, r0, r1
   49         ldr     r1, mptramp_pmu_boot
   50         add     r0, r2, r1
   51         ldr     r1, [r0], #0x00
   52 
   53         mov pc, r1
   54 
   55 _C_LABEL(mptramp_pmu_boot):
   56         .word 0x0
   57 
   58 END(mptramp)
   59 
   60         .global _C_LABEL(mptramp_end)
   61 _C_LABEL(mptramp_end):

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