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#include <machine/asm.h> 26 27/* Hypervisor entry call. */ 28#define hc .long 0x44000022 29 30/* 31 * Simple HV calls take the same arguments, with the same ABI, as this 32 * C function 33 */ 34ASENTRY(phyp_hcall) 35 mflr %r0 36 std %r0,16(%r1) 37#if defined(_CALL_ELF) && _CALL_ELF == 2 38 ld %r11,96(%r1) /* Last couple args into volatile regs*/ 39 ld %r12,104(%r1) 40#else 41 ld %r11,112(%r1) /* Last couple args into volatile regs*/ 42 ld %r12,120(%r1) 43#endif 44 hc /* invoke the hypervisor */ 45 ld %r0,16(%r1) 46 mtlr %r0 47 blr /* return r3 = status */ 48ASEND(phyp_hcall) 49 50/* 51 * PFT HV calls take a special ABI (see PAPR 14.5.4.1) 52 * 53 * r3-r7 arguments passed unchanged, r8-r10 are addresses of return values 54 * HV takes the same r3-r7, but returns values in r3, r4-r6 55 */ 56ASENTRY(phyp_pft_hcall) 57 mflr %r0 58 std %r0,16(%r1) 59 stdu %r1,-80(%r1) 60 std %r8,48(%r1) /* save arguments */ 61 std %r9,56(%r1) 62 std %r10,64(%r1) 63 hc /* invoke the hypervisor */ 64 ld %r11,48(%r1) /* store results */ 65 std %r4,0(%r11) 66 ld %r11,56(%r1) 67 std %r5,0(%r11) 68 ld %r11,64(%r1) 69 std %r6,0(%r11) 70 ld %r1,0(%r1) /* exit */ 71 ld %r0,16(%r1) 72 mtlr %r0 73 blr /* return r3 = status */ 74ASEND(phyp_pft_hcall) 75