hypervisor-stub.S

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 /*
    2  * Copyright (C) 2015 Mihai Carabas <mihai.carabas@gmail.com>
    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 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 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 "assym.inc"
   28 #include <sys/syscall.h>
   29 #include <machine/asm.h>
   30 #include <machine/asmacros.h>
   31 #include <machine/armreg.h>
   32 
   33 __FBSDID("$FreeBSD$");
   34 
   35 #if __ARM_ARCH >= 7
   36 #if defined(__ARM_ARCH_7VE__) || defined(__clang__)
   37 .arch_extension virt
   38 #endif
   39 
   40 ASENTRY_NP(hypervisor_stub_vect_install)
   41 
   42         /* Install hypervisor stub vectors. */
   43         adr     r0, hypervisor_stub_vect
   44         mcr     CP15_HVBAR(r0)
   45 
   46         /* Disable all the traps in the hypervisor. */
   47         mov     r0, #0
   48         mcr     CP15_HCR(r0)
   49         mcr     CP15_HCPTR(r0)
   50         mcr     CP15_HSTR(r0)
   51         mcr     CP15_HSCTLR(r0)
   52 
   53         /* Don't disable access to perf-mon from PL0,1 and preserve HPMN. */
   54         mrc     CP15_HDCR(r0)
   55         and     r0, #(ARM_CP15_HDCR_HPMN)
   56         /*  Caller implicit instruction barrier in the ERET. */
   57         mcr     CP15_HDCR(r0)
   58 
   59         RET
   60 
   61 END(hypervisor_stub_vect_install)
   62 
   63 ASENTRY_NP(hypervisor_stub_trap)
   64         /*
   65          * If the first parameter is -1 than return the
   66          * exception vector (HVBAR), otherwise set it to
   67          * the value of it.
   68          */
   69         cmp     r0, #-1
   70         mrceq   CP15_HVBAR(r0)
   71         mcrne   CP15_HVBAR(r0)
   72         ERET
   73 END(hypervisor_stub_trap)
   74 
   75         .globl hypervisor_stub_vect
   76         .align 5
   77 _C_LABEL(hypervisor_stub_vect):
   78         .word 0 /* Reset */
   79         .word 0 /* undev */
   80         .word 0 /* SMC */
   81         .word 0 /* PABT */
   82         .word 0 /* DABT */
   83         b       hypervisor_stub_trap /* HYP-Mode */
   84         .word 0 /* FIQ */
   85         .word 0 /* IRQ */
   86 #endif /* __ARM_ARCH >= 7 */
   87

Cache object: 84107118aa88d2f51b2bb987d8e839a6

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/arm/arm/hypervisor-stub.S

FreeBSD/Linux Kernel Cross Reference
sys/arm/arm/hypervisor-stub.S