//------------------------------------------------------------------------------ | |
// | |
// Make ECALL to SBI | |
// | |
// Copyright (c) 2023, Ventana Micro Systems Inc. All rights reserved.<BR> | |
// | |
// SPDX-License-Identifier: BSD-2-Clause-Patent | |
// | |
//------------------------------------------------------------------------------ | |
#include <Register/RiscV64/RiscVImpl.h> | |
.data | |
.align 3 | |
.section .text | |
// | |
// Make ECALL to SBI | |
// ecall updates the same a0 and a1 registers with | |
// return values. Hence, the C function which calls | |
// this should pass the address of Arg0 and Arg1. | |
// This routine saves the address and updates it | |
// with a0 and a1 once ecall returns. | |
// | |
// @param a0 : Pointer to Arg0 | |
// @param a1 : Pointer to Arg1 | |
// @param a2 : Arg2 | |
// @param a3 : Arg3 | |
// @param a4 : Arg4 | |
// @param a5 : Arg5 | |
// @param a6 : FunctionID | |
// @param a7 : ExtensionId | |
// | |
ASM_FUNC (RiscVSbiEcall) | |
mv t0, a0 | |
mv t1, a1 | |
ld a0, 0(a0) | |
ld a1, 0(a1) | |
ecall | |
sd a0, 0(t0) | |
sd a1, 0(t1) | |
ret |