1 /*
2 * Copyright (c) 2014-2021, STMicroelectronics - All Rights Reserved
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7 #include <stdbool.h>
8 #include <stdint.h>
9
10 #include <common/debug.h>
11 #include <common/runtime_svc.h>
12 #include <drivers/scmi-msg.h>
13 #include <lib/psci/psci.h>
14 #include <tools_share/uuid.h>
15
16 #include <stm32mp1_smc.h>
17
18 #include "bsec_svc.h"
19
20 /* STM32 SiP Service UUID */
21 DEFINE_SVC_UUID2(stm32_sip_svc_uid,
22 0xa778aa50, 0xf49b, 0x144a, 0x8a, 0x5e,
23 0x26, 0x4d, 0x59, 0x94, 0xc2, 0x14);
24
25 /* Setup STM32MP1 Standard Services */
stm32mp1_svc_setup(void)26 static int32_t stm32mp1_svc_setup(void)
27 {
28 /*
29 * PSCI is the only specification implemented as a Standard Service.
30 * Invoke PSCI setup from here.
31 */
32 return 0;
33 }
34
35 /*
36 * Top-level Standard Service SMC handler. This handler will in turn dispatch
37 * calls to PSCI SMC handler.
38 */
stm32mp1_svc_smc_handler(uint32_t smc_fid,u_register_t x1,u_register_t x2,u_register_t x3,u_register_t x4,void * cookie,void * handle,u_register_t flags)39 static uintptr_t stm32mp1_svc_smc_handler(uint32_t smc_fid, u_register_t x1,
40 u_register_t x2, u_register_t x3,
41 u_register_t x4, void *cookie,
42 void *handle, u_register_t flags)
43 {
44 uint32_t ret1 = 0U, ret2 = 0U;
45 bool ret_uid = false, ret2_enabled = false;
46
47 switch (smc_fid) {
48 case STM32_SIP_SVC_CALL_COUNT:
49 ret1 = STM32_COMMON_SIP_NUM_CALLS;
50 break;
51
52 case STM32_SIP_SVC_UID:
53 /* Return UUID to the caller */
54 ret_uid = true;
55 break;
56
57 case STM32_SIP_SVC_VERSION:
58 /* Return the version of current implementation */
59 ret1 = STM32_SIP_SVC_VERSION_MAJOR;
60 ret2 = STM32_SIP_SVC_VERSION_MINOR;
61 ret2_enabled = true;
62 break;
63
64 case STM32_SMC_BSEC:
65 ret1 = bsec_main(x1, x2, x3, &ret2);
66 ret2_enabled = true;
67 break;
68
69 case STM32_SIP_SMC_SCMI_AGENT0:
70 scmi_smt_fastcall_smc_entry(0);
71 break;
72 case STM32_SIP_SMC_SCMI_AGENT1:
73 scmi_smt_fastcall_smc_entry(1);
74 break;
75
76 default:
77 WARN("Unimplemented STM32MP1 Service Call: 0x%x\n", smc_fid);
78 ret1 = STM32_SMC_NOT_SUPPORTED;
79 break;
80 }
81
82 if (ret_uid) {
83 SMC_UUID_RET(handle, stm32_sip_svc_uid);
84 }
85
86 if (ret2_enabled) {
87 SMC_RET2(handle, ret1, ret2);
88 }
89
90 SMC_RET1(handle, ret1);
91 }
92
93 /* Register Standard Service Calls as runtime service */
94 DECLARE_RT_SVC(stm32mp1_sip_svc,
95 OEN_SIP_START,
96 OEN_SIP_END,
97 SMC_TYPE_FAST,
98 stm32mp1_svc_setup,
99 stm32mp1_svc_smc_handler
100 );
101