phyp-hvcall.S

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    1 /*-
    2  * Copyright (C) 2010 Andreas Tobler
    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 ``AS IS'' AND ANY EXPRESS OR
   15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   17  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   18  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   20  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   21  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   22  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   23  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   24  *
   25  * $FreeBSD$
   26  */
   27 #include <machine/asm.h>
   28 
   29 /* Hypervisor entry call. */
   30 #define  hc  .long 0x44000022
   31 
   32 /*
   33  * Simple HV calls take the same arguments, with the same ABI, as this
   34  * C function
   35  */
   36 ASENTRY(phyp_hcall)
   37         mflr    %r0
   38         std     %r0,16(%r1)
   39 #if defined(_CALL_ELF) && _CALL_ELF == 2
   40         ld      %r11,96(%r1)            /* Last couple args into volatile regs*/
   41         ld      %r12,104(%r1)
   42 #else
   43         ld      %r11,112(%r1)           /* Last couple args into volatile regs*/
   44         ld      %r12,120(%r1)
   45 #endif
   46         hc                              /* invoke the hypervisor */
   47         ld      %r0,16(%r1)
   48         mtlr    %r0
   49         blr                             /* return r3 = status */
   50 ASEND(phyp_hcall)
   51 
   52 /*
   53  * PFT HV calls take a special ABI (see PAPR 14.5.4.1)
   54  *
   55  * r3-r7 arguments passed unchanged, r8-r10 are addresses of return values
   56  * HV takes the same r3-r7, but returns values in r3, r4-r6
   57  */
   58 ASENTRY(phyp_pft_hcall)
   59         mflr    %r0
   60         std     %r0,16(%r1)
   61         stdu    %r1,-80(%r1)
   62         std     %r8,48(%r1)             /* save arguments */
   63         std     %r9,56(%r1)
   64         std     %r10,64(%r1)
   65         hc                              /* invoke the hypervisor */
   66         ld      %r11,48(%r1)            /* store results */
   67         std     %r4,0(%r11)
   68         ld      %r11,56(%r1)
   69         std     %r5,0(%r11)
   70         ld      %r11,64(%r1)
   71         std     %r6,0(%r11)
   72         ld      %r1,0(%r1)              /* exit */
   73         ld      %r0,16(%r1)
   74         mtlr    %r0
   75         blr                             /* return r3 = status */
   76 ASEND(phyp_pft_hcall)

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sys/powerpc/pseries/phyp-hvcall.S