1 /*
2 * Copyright (c) 2014-2023, Arm Limited and Contributors. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7 #include <assert.h>
8 #include <stdint.h>
9
10 #include <common/debug.h>
11 #include <common/runtime_svc.h>
12 #include <lib/el3_runtime/cpu_data.h>
13 #include <lib/pmf/pmf.h>
14 #include <lib/psci/psci.h>
15 #include <lib/runtime_instr.h>
16 #include <services/drtm_svc.h>
17 #include <services/errata_abi_svc.h>
18 #include <services/pci_svc.h>
19 #include <services/rmmd_svc.h>
20 #include <services/sdei.h>
21 #include <services/spm_mm_svc.h>
22 #include <services/spmc_svc.h>
23 #include <services/spmd_svc.h>
24 #include <services/std_svc.h>
25 #include <services/trng_svc.h>
26 #include <smccc_helpers.h>
27 #include <tools_share/uuid.h>
28
29 /* Standard Service UUID */
30 static uuid_t arm_svc_uid = {
31 {0x5b, 0x90, 0x8d, 0x10},
32 {0x63, 0xf8},
33 {0xe8, 0x47},
34 0xae, 0x2d,
35 {0xc0, 0xfb, 0x56, 0x41, 0xf6, 0xe2}
36 };
37
38 /* Setup Standard Services */
std_svc_setup(void)39 static int32_t std_svc_setup(void)
40 {
41 uintptr_t svc_arg;
42 int ret = 0;
43
44 svc_arg = get_arm_std_svc_args(PSCI_FID_MASK);
45 assert(svc_arg);
46
47 /*
48 * PSCI is one of the specifications implemented as a Standard Service.
49 * The `psci_setup()` also does EL3 architectural setup.
50 */
51 if (psci_setup((const psci_lib_args_t *)svc_arg) != PSCI_E_SUCCESS) {
52 ret = 1;
53 }
54
55 #if SPM_MM
56 if (spm_mm_setup() != 0) {
57 ret = 1;
58 }
59 #endif
60
61 #if defined(SPD_spmd)
62 if (spmd_setup() != 0) {
63 ret = 1;
64 }
65 #endif
66
67 #if ENABLE_RME
68 if (rmmd_setup() != 0) {
69 ret = 1;
70 }
71 #endif
72
73 #if SDEI_SUPPORT
74 /* SDEI initialisation */
75 sdei_init();
76 #endif
77
78 #if TRNG_SUPPORT
79 /* TRNG initialisation */
80 trng_setup();
81 #endif /* TRNG_SUPPORT */
82
83 #if DRTM_SUPPORT
84 if (drtm_setup() != 0) {
85 ret = 1;
86 }
87 #endif /* DRTM_SUPPORT */
88
89 return ret;
90 }
91
92 /*
93 * Top-level Standard Service SMC handler. This handler will in turn dispatch
94 * calls to PSCI SMC handler
95 */
std_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)96 static uintptr_t std_svc_smc_handler(uint32_t smc_fid,
97 u_register_t x1,
98 u_register_t x2,
99 u_register_t x3,
100 u_register_t x4,
101 void *cookie,
102 void *handle,
103 u_register_t flags)
104 {
105 if (((smc_fid >> FUNCID_CC_SHIFT) & FUNCID_CC_MASK) == SMC_32) {
106 /* 32-bit SMC function, clear top parameter bits */
107
108 x1 &= UINT32_MAX;
109 x2 &= UINT32_MAX;
110 x3 &= UINT32_MAX;
111 x4 &= UINT32_MAX;
112 }
113
114 /*
115 * Dispatch PSCI calls to PSCI SMC handler and return its return
116 * value
117 */
118 if (is_psci_fid(smc_fid)) {
119 uint64_t ret;
120
121 #if ENABLE_RUNTIME_INSTRUMENTATION
122
123 /*
124 * Flush cache line so that even if CPU power down happens
125 * the timestamp update is reflected in memory.
126 */
127 PMF_WRITE_TIMESTAMP(rt_instr_svc,
128 RT_INSTR_ENTER_PSCI,
129 PMF_CACHE_MAINT,
130 get_cpu_data(cpu_data_pmf_ts[CPU_DATA_PMF_TS0_IDX]));
131 #endif
132
133 ret = psci_smc_handler(smc_fid, x1, x2, x3, x4,
134 cookie, handle, flags);
135
136 #if ENABLE_RUNTIME_INSTRUMENTATION
137 PMF_CAPTURE_TIMESTAMP(rt_instr_svc,
138 RT_INSTR_EXIT_PSCI,
139 PMF_NO_CACHE_MAINT);
140 #endif
141
142 SMC_RET1(handle, ret);
143 }
144
145 #if SPM_MM
146 /*
147 * Dispatch SPM calls to SPM SMC handler and return its return
148 * value
149 */
150 if (is_spm_mm_fid(smc_fid)) {
151 return spm_mm_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
152 handle, flags);
153 }
154 #endif
155
156 #if defined(SPD_spmd)
157 /*
158 * Dispatch FFA calls to the FFA SMC handler implemented by the SPM
159 * dispatcher and return its return value
160 */
161 if (is_ffa_fid(smc_fid)) {
162 return spmd_ffa_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
163 handle, flags);
164 }
165 #endif
166
167 #if SDEI_SUPPORT
168 if (is_sdei_fid(smc_fid)) {
169 return sdei_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
170 flags);
171 }
172 #endif
173
174 #if TRNG_SUPPORT
175 if (is_trng_fid(smc_fid)) {
176 return trng_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
177 flags);
178 }
179 #endif /* TRNG_SUPPORT */
180
181 #if ERRATA_ABI_SUPPORT
182 if (is_errata_fid(smc_fid)) {
183 return errata_abi_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
184 handle, flags);
185 }
186 #endif /* ERRATA_ABI_SUPPORT */
187
188 #if ENABLE_RME
189
190 if (is_rmmd_el3_fid(smc_fid)) {
191 return rmmd_rmm_el3_handler(smc_fid, x1, x2, x3, x4, cookie,
192 handle, flags);
193 }
194
195 if (is_rmi_fid(smc_fid)) {
196 return rmmd_rmi_handler(smc_fid, x1, x2, x3, x4, cookie,
197 handle, flags);
198 }
199 #endif
200
201 #if SMC_PCI_SUPPORT
202 if (is_pci_fid(smc_fid)) {
203 return pci_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
204 flags);
205 }
206 #endif
207
208 #if DRTM_SUPPORT
209 if (is_drtm_fid(smc_fid)) {
210 return drtm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
211 flags);
212 }
213 #endif /* DRTM_SUPPORT */
214
215 switch (smc_fid) {
216 case ARM_STD_SVC_CALL_COUNT:
217 /*
218 * Return the number of Standard Service Calls. PSCI is the only
219 * standard service implemented; so return number of PSCI calls
220 */
221 SMC_RET1(handle, PSCI_NUM_CALLS);
222
223 case ARM_STD_SVC_UID:
224 /* Return UID to the caller */
225 SMC_UUID_RET(handle, arm_svc_uid);
226
227 case ARM_STD_SVC_VERSION:
228 /* Return the version of current implementation */
229 SMC_RET2(handle, STD_SVC_VERSION_MAJOR, STD_SVC_VERSION_MINOR);
230
231 default:
232 VERBOSE("Unimplemented Standard Service Call: 0x%x \n", smc_fid);
233 SMC_RET1(handle, SMC_UNK);
234 }
235 }
236
237 /* Register Standard Service Calls as runtime service */
238 DECLARE_RT_SVC(
239 std_svc,
240
241 OEN_STD_START,
242 OEN_STD_END,
243 SMC_TYPE_FAST,
244 std_svc_setup,
245 std_svc_smc_handler
246 );
247
