1 /*
2 * Copyright (c) 2016-2019,2021, ARM Limited and Contributors. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7 #include <stdint.h>
8
9 #include <common/debug.h>
10 #include <common/runtime_svc.h>
11 #include <drivers/arm/ethosn.h>
12 #include <lib/debugfs.h>
13 #include <lib/pmf/pmf.h>
14 #include <plat/arm/common/arm_sip_svc.h>
15 #include <plat/arm/common/plat_arm.h>
16 #include <tools_share/uuid.h>
17
18 /* ARM SiP Service UUID */
19 DEFINE_SVC_UUID2(arm_sip_svc_uid,
20 0x556d75e2, 0x6033, 0xb54b, 0xb5, 0x75,
21 0x62, 0x79, 0xfd, 0x11, 0x37, 0xff);
22
arm_sip_setup(void)23 static int arm_sip_setup(void)
24 {
25 if (pmf_setup() != 0) {
26 return 1;
27 }
28
29 #if USE_DEBUGFS
30
31 if (debugfs_smc_setup() != 0) {
32 return 1;
33 }
34
35 #endif /* USE_DEBUGFS */
36
37 return 0;
38 }
39
40 /*
41 * This function handles ARM defined SiP Calls
42 */
arm_sip_handler(unsigned int 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)43 static uintptr_t arm_sip_handler(unsigned int smc_fid,
44 u_register_t x1,
45 u_register_t x2,
46 u_register_t x3,
47 u_register_t x4,
48 void *cookie,
49 void *handle,
50 u_register_t flags)
51 {
52 int call_count = 0;
53
54 #if ENABLE_PMF
55
56 /*
57 * Dispatch PMF calls to PMF SMC handler and return its return
58 * value
59 */
60 if (is_pmf_fid(smc_fid)) {
61 return pmf_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
62 handle, flags);
63 }
64
65 #endif /* ENABLE_PMF */
66
67 #if USE_DEBUGFS
68
69 if (is_debugfs_fid(smc_fid)) {
70 return debugfs_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
71 handle, flags);
72 }
73
74 #endif /* USE_DEBUGFS */
75
76 #if ARM_ETHOSN_NPU_DRIVER
77
78 if (is_ethosn_fid(smc_fid)) {
79 return ethosn_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
80 handle, flags);
81 }
82
83 #endif /* ARM_ETHOSN_NPU_DRIVER */
84
85 switch (smc_fid) {
86 case ARM_SIP_SVC_EXE_STATE_SWITCH: {
87 /* Execution state can be switched only if EL3 is AArch64 */
88 #ifdef __aarch64__
89 /* Allow calls from non-secure only */
90 if (!is_caller_non_secure(flags))
91 SMC_RET1(handle, STATE_SW_E_DENIED);
92
93 /*
94 * Pointers used in execution state switch are all 32 bits wide
95 */
96 return (uintptr_t) arm_execution_state_switch(smc_fid,
97 (uint32_t) x1, (uint32_t) x2, (uint32_t) x3,
98 (uint32_t) x4, handle);
99 #else
100 /* State switch denied */
101 SMC_RET1(handle, STATE_SW_E_DENIED);
102 #endif /* __aarch64__ */
103 }
104
105 case ARM_SIP_SVC_CALL_COUNT:
106 /* PMF calls */
107 call_count += PMF_NUM_SMC_CALLS;
108
109 #if ARM_ETHOSN_NPU_DRIVER
110 /* ETHOSN calls */
111 call_count += ETHOSN_NUM_SMC_CALLS;
112 #endif /* ARM_ETHOSN_NPU_DRIVER */
113
114 /* State switch call */
115 call_count += 1;
116
117 SMC_RET1(handle, call_count);
118
119 case ARM_SIP_SVC_UID:
120 /* Return UID to the caller */
121 SMC_UUID_RET(handle, arm_sip_svc_uid);
122
123 case ARM_SIP_SVC_VERSION:
124 /* Return the version of current implementation */
125 SMC_RET2(handle, ARM_SIP_SVC_VERSION_MAJOR, ARM_SIP_SVC_VERSION_MINOR);
126
127 default:
128 WARN("Unimplemented ARM SiP Service Call: 0x%x \n", smc_fid);
129 SMC_RET1(handle, SMC_UNK);
130 }
131
132 }
133
134
135 /* Define a runtime service descriptor for fast SMC calls */
136 DECLARE_RT_SVC(
137 arm_sip_svc,
138 OEN_SIP_START,
139 OEN_SIP_END,
140 SMC_TYPE_FAST,
141 arm_sip_setup,
142 arm_sip_handler
143 );
144