1 /*
2 * Copyright (c) 2014-2022, 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/pci_svc.h>
18 #include <services/rmmd_svc.h>
19 #include <services/sdei.h>
20 #include <services/spm_mm_svc.h>
21 #include <services/spmc_svc.h>
22 #include <services/spmd_svc.h>
23 #include <services/std_svc.h>
24 #include <services/trng_svc.h>
25 #include <smccc_helpers.h>
26 #include <tools_share/uuid.h>
27
28 /* Standard Service UUID */
29 static uuid_t arm_svc_uid = {
30 {0x5b, 0x90, 0x8d, 0x10},
31 {0x63, 0xf8},
32 {0xe8, 0x47},
33 0xae, 0x2d,
34 {0xc0, 0xfb, 0x56, 0x41, 0xf6, 0xe2}
35 };
36
37 /* Setup Standard Services */
std_svc_setup(void)38 static int32_t std_svc_setup(void)
39 {
40 uintptr_t svc_arg;
41 int ret = 0;
42
43 svc_arg = get_arm_std_svc_args(PSCI_FID_MASK);
44 assert(svc_arg);
45
46 /*
47 * PSCI is one of the specifications implemented as a Standard Service.
48 * The `psci_setup()` also does EL3 architectural setup.
49 */
50 if (psci_setup((const psci_lib_args_t *)svc_arg) != PSCI_E_SUCCESS) {
51 ret = 1;
52 }
53
54 #if SPM_MM
55 if (spm_mm_setup() != 0) {
56 ret = 1;
57 }
58 #endif
59
60 #if defined(SPD_spmd)
61 if (spmd_setup() != 0) {
62 ret = 1;
63 }
64 #endif
65
66 #if ENABLE_RME
67 if (rmmd_setup() != 0) {
68 ret = 1;
69 }
70 #endif
71
72 #if SDEI_SUPPORT
73 /* SDEI initialisation */
74 sdei_init();
75 #endif
76
77 #if TRNG_SUPPORT
78 /* TRNG initialisation */
79 trng_setup();
80 #endif /* TRNG_SUPPORT */
81
82 #if DRTM_SUPPORT
83 if (drtm_setup() != 0) {
84 ret = 1;
85 }
86 #endif /* DRTM_SUPPORT */
87
88 return ret;
89 }
90
91 /*
92 * Top-level Standard Service SMC handler. This handler will in turn dispatch
93 * calls to PSCI SMC handler
94 */
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)95 static uintptr_t std_svc_smc_handler(uint32_t smc_fid,
96 u_register_t x1,
97 u_register_t x2,
98 u_register_t x3,
99 u_register_t x4,
100 void *cookie,
101 void *handle,
102 u_register_t flags)
103 {
104 if (((smc_fid >> FUNCID_CC_SHIFT) & FUNCID_CC_MASK) == SMC_32) {
105 /* 32-bit SMC function, clear top parameter bits */
106
107 x1 &= UINT32_MAX;
108 x2 &= UINT32_MAX;
109 x3 &= UINT32_MAX;
110 x4 &= UINT32_MAX;
111 }
112
113 /*
114 * Dispatch PSCI calls to PSCI SMC handler and return its return
115 * value
116 */
117 if (is_psci_fid(smc_fid)) {
118 uint64_t ret;
119
120 #if ENABLE_RUNTIME_INSTRUMENTATION
121
122 /*
123 * Flush cache line so that even if CPU power down happens
124 * the timestamp update is reflected in memory.
125 */
126 PMF_WRITE_TIMESTAMP(rt_instr_svc,
127 RT_INSTR_ENTER_PSCI,
128 PMF_CACHE_MAINT,
129 get_cpu_data(cpu_data_pmf_ts[CPU_DATA_PMF_TS0_IDX]));
130 #endif
131
132 ret = psci_smc_handler(smc_fid, x1, x2, x3, x4,
133 cookie, handle, flags);
134
135 #if ENABLE_RUNTIME_INSTRUMENTATION
136 PMF_CAPTURE_TIMESTAMP(rt_instr_svc,
137 RT_INSTR_EXIT_PSCI,
138 PMF_NO_CACHE_MAINT);
139 #endif
140
141 SMC_RET1(handle, ret);
142 }
143
144 #if SPM_MM
145 /*
146 * Dispatch SPM calls to SPM SMC handler and return its return
147 * value
148 */
149 if (is_spm_mm_fid(smc_fid)) {
150 return spm_mm_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
151 handle, flags);
152 }
153 #endif
154
155 #if defined(SPD_spmd)
156 /*
157 * Dispatch FFA calls to the FFA SMC handler implemented by the SPM
158 * dispatcher and return its return value
159 */
160 if (is_ffa_fid(smc_fid)) {
161 return spmd_ffa_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
162 handle, flags);
163 }
164 #endif
165
166 #if SDEI_SUPPORT
167 if (is_sdei_fid(smc_fid)) {
168 return sdei_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
169 flags);
170 }
171 #endif
172
173 #if TRNG_SUPPORT
174 if (is_trng_fid(smc_fid)) {
175 return trng_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
176 flags);
177 }
178 #endif /* TRNG_SUPPORT */
179
180 #if ENABLE_RME
181
182 if (is_rmmd_el3_fid(smc_fid)) {
183 return rmmd_rmm_el3_handler(smc_fid, x1, x2, x3, x4, cookie,
184 handle, flags);
185 }
186
187 if (is_rmi_fid(smc_fid)) {
188 return rmmd_rmi_handler(smc_fid, x1, x2, x3, x4, cookie,
189 handle, flags);
190 }
191 #endif
192
193 #if SMC_PCI_SUPPORT
194 if (is_pci_fid(smc_fid)) {
195 return pci_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
196 flags);
197 }
198 #endif
199
200 #if DRTM_SUPPORT
201 if (is_drtm_fid(smc_fid)) {
202 return drtm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
203 flags);
204 }
205 #endif /* DRTM_SUPPORT */
206
207 switch (smc_fid) {
208 case ARM_STD_SVC_CALL_COUNT:
209 /*
210 * Return the number of Standard Service Calls. PSCI is the only
211 * standard service implemented; so return number of PSCI calls
212 */
213 SMC_RET1(handle, PSCI_NUM_CALLS);
214
215 case ARM_STD_SVC_UID:
216 /* Return UID to the caller */
217 SMC_UUID_RET(handle, arm_svc_uid);
218
219 case ARM_STD_SVC_VERSION:
220 /* Return the version of current implementation */
221 SMC_RET2(handle, STD_SVC_VERSION_MAJOR, STD_SVC_VERSION_MINOR);
222
223 default:
224 VERBOSE("Unimplemented Standard Service Call: 0x%x \n", smc_fid);
225 SMC_RET1(handle, SMC_UNK);
226 }
227 }
228
229 /* Register Standard Service Calls as runtime service */
230 DECLARE_RT_SVC(
231 std_svc,
232
233 OEN_STD_START,
234 OEN_STD_END,
235 SMC_TYPE_FAST,
236 std_svc_setup,
237 std_svc_smc_handler
238 );
239