1 // SPDX-License-Identifier: BSD-2-Clause
2 /*
3 * Copyright (C) 2016 Freescale Semiconductor, Inc.
4 * All rights reserved.
5 *
6 * Peng Fan <peng.fan@nxp.com>
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright notice,
15 * this list of conditions and the following disclaimer in the documentation
16 * and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include <stdint.h>
32 #include <sm/optee_smc.h>
33 #include <sm/psci.h>
34 #include <sm/sm.h>
35 #include <sm/std_smc.h>
36 #include <tee/uuid.h>
37 #include <trace.h>
38
39 static const TEE_UUID uuid = {
40 0x5f8b97df, 0x2d0d, 0x4ad2,
41 {0x98, 0xd2, 0x74, 0xf4, 0x38, 0x27, 0x98, 0xbb},
42 };
43
smc_std_handler(struct thread_smc_args * args,struct sm_nsec_ctx * nsec)44 void smc_std_handler(struct thread_smc_args *args, struct sm_nsec_ctx *nsec)
45 {
46 uint32_t smc_fid = args->a0;
47
48 if (is_psci_fid(smc_fid)) {
49 tee_psci_handler(args, nsec);
50 return;
51 }
52
53 switch (smc_fid) {
54 case ARM_STD_SVC_CALL_COUNT:
55 /* PSCI is the only STD service implemented */
56 args->a0 = PSCI_NUM_CALLS;
57 break;
58 case ARM_STD_SVC_UID:
59 args->a0 = uuid.timeLow;
60 args->a1 = (uuid.timeHiAndVersion << 16) | uuid.timeMid;
61 args->a2 = (uuid.clockSeqAndNode[3] << 24) |
62 (uuid.clockSeqAndNode[2] << 16) |
63 (uuid.clockSeqAndNode[1] << 8) |
64 uuid.clockSeqAndNode[0];
65 args->a3 = (uuid.clockSeqAndNode[7] << 24) |
66 (uuid.clockSeqAndNode[6] << 16) |
67 (uuid.clockSeqAndNode[5] << 8) |
68 uuid.clockSeqAndNode[4];
69 break;
70 case ARM_STD_SVC_VERSION:
71 args->a0 = STD_SVC_VERSION_MAJOR;
72 args->a1 = STD_SVC_VERSION_MINOR;
73 break;
74 default:
75 args->a0 = OPTEE_SMC_RETURN_UNKNOWN_FUNCTION;
76 break;
77 }
78 }
79