| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright (C) 2020 Google, Inc. |
| */ |
| |
| #include <linux/linkage.h> |
| |
| .macro push ra, rb |
| stp \ra, \rb, [sp,#-16]! |
| .endm |
| |
| .macro pop ra, rb |
| ldp \ra, \rb, [sp], #16 |
| .endm |
| |
| lr .req x30 |
| |
| SYM_FUNC_START(trusty_smc8) |
| /* |
| * Save x8 (return value ptr) and lr. The SMC calling convention says el3 |
| * does not need to preserve x8. The normal ABI does not require either x8 |
| * or lr to be preserved. |
| */ |
| push x8, lr |
| smc #0 |
| pop x8, lr |
| |
| /* Copy 8-register smc return value to struct smc_ret8 return value */ |
| stp x0, x1, [x8], #16 |
| stp x2, x3, [x8], #16 |
| stp x4, x5, [x8], #16 |
| stp x6, x7, [x8], #16 |
| |
| ret |
| SYM_FUNC_END(trusty_smc8) |
