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/* SPDX-License-Identifier: GPL-2.0-or-later */
/***************************************************************************
* Xtensa flasher stub wrapper *
* Copyright (C) 2017 Espressif Systems Ltd. *
***************************************************************************/
/*
* Expects :
* a0 = zero
* a1 = stack_base + stack_size - 16, 16 bytes aligned
* a8 = address of the function to call
* Params :
* a2 = command arg0, result (out)
* a3 = command arg1
* a4 = command arg2
* a5 = command arg3
* a6 = command arg4
* Maximum 5 user args
*/
.text
.align 4
_stub_enter:
/* initialize initial stack frame for callx8 */
addi a9, sp, 32 /* point 16 past extra save area */
s32e a9, sp, -12 /* access to extra save area */
/* prepare args */
mov a10, a2
mov a11, a3
mov a12, a4
mov a13, a5
mov a14, a6
/* call stub */
callx8 a8
/* prepare return value */
mov a2, a10
break 0,0
_idle_loop:
j _idle_loop
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