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