| /* |
| * Copyright (c) 2013-2017, Arm Limited. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include <asm_macros.S> |
| |
| .globl asm_tftf_smc64 |
| |
| .section .text, "ax" |
| |
| |
| /* --------------------------------------------------------------------------- |
| * smc_ret_values asm_tftf_smc64(uint32_t arg0, |
| * u_register_t arg1, |
| * u_register_t arg2, |
| * u_register_t arg3, |
| * u_register_t arg4, |
| * u_register_t arg5, |
| * u_register_t arg6, |
| * u_register_t arg7); |
| * --------------------------------------------------------------------------- |
| */ |
| func asm_tftf_smc64 |
| /* |
| * According to the AAPCS64, x8 is the indirect result location |
| * register. It contains the address of the memory block that the caller |
| * has reserved to hold the result, i.e. the smc_ret_values structure |
| * in our case. |
| * x8 might be clobbered across the SMC call so save it on the stack. |
| * Although x8 contains an 8 byte value, we are allocating 16bytes on the stack |
| * to respect 16byte stack-alignment. |
| */ |
| str x8, [sp, #-16]! |
| |
| /* SMC arguments are already stored in x0-x6 */ |
| smc #0 |
| |
| /* Pop x8 into a caller-saved register */ |
| ldr x9, [sp], #16 |
| |
| /* |
| * Return values are stored in x0-x3, put them in the 'smc_ret_values' |
| * return structure |
| */ |
| stp x0, x1, [x9, #0] |
| stp x2, x3, [x9, #16] |
| ret |
| endfunc asm_tftf_smc64 |