1 | // SPDX-License-Identifier: GPL-2.0-only |
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2 | /* |
3 | * Copyright (C) 2021 ARM Ltd. |
4 | */ |
5 | |
6 | #include <linux/printk.h> |
7 | |
8 | #include "common.h" |
9 | |
10 | static void __arm_ffa_fn_smc(ffa_value_t args, ffa_value_t *res) |
11 | { |
12 | arm_smccc_1_2_smc(&args, res); |
13 | } |
14 | |
15 | static void __arm_ffa_fn_hvc(ffa_value_t args, ffa_value_t *res) |
16 | { |
17 | arm_smccc_1_2_hvc(&args, res); |
18 | } |
19 | |
20 | int __init ffa_transport_init(ffa_fn **invoke_ffa_fn) |
21 | { |
22 | enum arm_smccc_conduit conduit; |
23 | |
24 | if (arm_smccc_get_version() < ARM_SMCCC_VERSION_1_2) |
25 | return -EOPNOTSUPP; |
26 | |
27 | conduit = arm_smccc_1_1_get_conduit(); |
28 | if (conduit == SMCCC_CONDUIT_NONE) { |
29 | pr_err("%s: invalid SMCCC conduit\n", __func__); |
30 | return -EOPNOTSUPP; |
31 | } |
32 | |
33 | if (conduit == SMCCC_CONDUIT_SMC) |
34 | *invoke_ffa_fn = __arm_ffa_fn_smc; |
35 | else |
36 | *invoke_ffa_fn = __arm_ffa_fn_hvc; |
37 | |
38 | return 0; |
39 | } |
40 |