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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