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/*
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright © 2022 Keith Packard
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <picolibc.h>
.text
.section .text.opal_call
.align 2
.p2align 4,,15
/*
* void
* opal_call(void *r3, void *r4, void *r5, int call_r6, void *base_r7, void *entry_r8);
*/
#ifdef __PPC64__
.global opal_call
.section ".opd","aw"
.align 3
opal_call:
.quad .opal_call,.TOC.@tocbase,0
.previous
#else
opal_call:
#endif
.type opal_call, @function
.opal_call:
.cfi_startproc
/* Save LR */
mflr %r0
std %r0, 16(%r1)
/* Save TOC */
std %r2, 40(%r1)
/* Create a new stack frame */
stdu %r1,-112(%r1)
/* Put 'call' in %r0 */
mr %r0, %r6
/* Set OPAL TOC */
mr %r2, %r7
/* Call OPAL */
mtctr %r8
bctrl
nop
/* Pop stack frame */
addi %r1, %r1, 112
/* Restore TOC */
ld %r2, 40(%r1)
/* Restore LR */
ld %r0, 16(%r1)
mtlr %r0
/* All done */
blr
.cfi_endproc
.size opal_call,.-.opal_call
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