blob: a48a7975cbee12daa2184282c5a919870664f9c6 [file] [log] [blame]
/*
* Copyright 2019 The Hafnium Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "hf/call.h"
#include "hf/spci.h"
#include "hf/types.h"
int64_t hf_call(uint64_t arg0, uint64_t arg1, uint64_t arg2, uint64_t arg3)
{
register uint64_t r0 __asm__("x0") = arg0;
register uint64_t r1 __asm__("x1") = arg1;
register uint64_t r2 __asm__("x2") = arg2;
register uint64_t r3 __asm__("x3") = arg3;
__asm__ volatile(
"hvc #0"
: /* Output registers, also used as inputs ('+' constraint). */
"+r"(r0), "+r"(r1), "+r"(r2), "+r"(r3)
:
: /* Clobber registers. */
"x4", "x5", "x6", "x7");
return r0;
}
struct spci_value spci_call(struct spci_value args)
{
register uint64_t r0 __asm__("x0") = args.func;
register uint64_t r1 __asm__("x1") = args.arg1;
register uint64_t r2 __asm__("x2") = args.arg2;
register uint64_t r3 __asm__("x3") = args.arg3;
register uint64_t r4 __asm__("x4") = args.arg4;
register uint64_t r5 __asm__("x5") = args.arg5;
register uint64_t r6 __asm__("x6") = args.arg6;
register uint64_t r7 __asm__("x7") = args.arg7;
__asm__ volatile(
"hvc #0"
: /* Output registers, also used as inputs ('+' constraint). */
"+r"(r0), "+r"(r1), "+r"(r2), "+r"(r3), "+r"(r4), "+r"(r5),
"+r"(r6), "+r"(r7));
return (struct spci_value){.func = r0,
.arg1 = r1,
.arg2 = r2,
.arg3 = r3,
.arg4 = r4,
.arg5 = r5,
.arg6 = r6,
.arg7 = r7};
}