1/*
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright © 2022 Keith Packard
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above
14 *    copyright notice, this list of conditions and the following
15 *    disclaimer in the documentation and/or other materials provided
16 *    with the distribution.
17 *
18 * 3. Neither the name of the copyright holder nor the names of its
19 *    contributors may be used to endorse or promote products derived
20 *    from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
31 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
33 * OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35
36	.text
37	.section	.text.opal_call
38	.align		2
39	.p2align	4,,15
40/*
41 * void
42 * opal_call(void *r3, void *r4, void *r5, int call_r6, void *base_r7, void *entry_r8);
43 */
44#ifdef __PPC64__
45	.global		opal_call
46	.section	".opd","aw"
47	.align		3
48opal_call:
49	.quad		.opal_call,.TOC.@tocbase,0
50	.previous
51#else
52opal_call:
53#endif
54	.type		opal_call, @function
55.opal_call:
56	.cfi_startproc
57
58	/* Save LR */
59	mflr		%r0
60	std		%r0, 16(%r1)
61	/* Save TOC */
62	std		%r2, 40(%r1)
63
64	/* Create a new stack frame */
65	stdu		%r1,-112(%r1)
66
67	/* Put 'call' in %r0 */
68	mr		%r0, %r6
69
70	/* Set OPAL TOC */
71	mr		%r2, %r7
72
73	/* Call OPAL */
74	mtctr		%r8
75	bctrl
76
77	nop
78
79	/* Pop stack frame */
80	addi		%r1, %r1, 112
81
82	/* Restore TOC */
83	ld		%r2, 40(%r1)
84
85	/* Restore LR */
86	ld		%r0, 16(%r1)
87	mtlr		%r0
88
89	/* All done */
90	blr
91
92	.cfi_endproc
93	.size		opal_call,.-.opal_call
94