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Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +00001/*
Jimmy Brisson26c5b5c2020-06-22 14:18:42 -05002 * Copyright (c) 2014-2021, ARM Limited and Contributors. All rights reserved.
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +00003 *
dp-armfa3cf0b2017-05-03 09:38:09 +01004 * SPDX-License-Identifier: BSD-3-Clause
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +00005 */
6
Soby Mathew8da89662016-09-19 17:21:15 +01007#include <assert.h>
Dan Handley2bd4ef22014-04-09 13:14:54 +01008#include <stdint.h>
Antonio Nino Diaze0f90632018-12-14 00:18:21 +00009
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/sdei.h>
Paul Beesleye9754e62019-10-15 12:51:55 +000017#include <services/spm_mm_svc.h>
Achin Gupta3e1f1972019-10-11 15:49:00 +010018#include <services/spmd_svc.h>
Antonio Nino Diaze0f90632018-12-14 00:18:21 +000019#include <services/std_svc.h>
Jimmy Brisson26c5b5c2020-06-22 14:18:42 -050020#include <services/trng_svc.h>
Antonio Nino Diaze0f90632018-12-14 00:18:21 +000021#include <smccc_helpers.h>
22#include <tools_share/uuid.h>
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000023
24/* Standard Service UUID */
Roberto Vargaseace8f12018-04-26 13:36:53 +010025static uuid_t arm_svc_uid = {
26 {0x5b, 0x90, 0x8d, 0x10},
27 {0x63, 0xf8},
28 {0xe8, 0x47},
29 0xae, 0x2d,
30 {0xc0, 0xfb, 0x56, 0x41, 0xf6, 0xe2}
31};
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000032
Soby Mathew8da89662016-09-19 17:21:15 +010033/* Setup Standard Services */
34static int32_t std_svc_setup(void)
35{
36 uintptr_t svc_arg;
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010037 int ret = 0;
Soby Mathew8da89662016-09-19 17:21:15 +010038
39 svc_arg = get_arm_std_svc_args(PSCI_FID_MASK);
40 assert(svc_arg);
41
42 /*
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010043 * PSCI is one of the specifications implemented as a Standard Service.
Soby Mathew8da89662016-09-19 17:21:15 +010044 * The `psci_setup()` also does EL3 architectural setup.
45 */
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010046 if (psci_setup((const psci_lib_args_t *)svc_arg) != PSCI_E_SUCCESS) {
47 ret = 1;
48 }
49
Paul Beesleydb4e25a2019-10-14 15:27:12 +000050#if SPM_MM
Paul Beesleye9754e62019-10-15 12:51:55 +000051 if (spm_mm_setup() != 0) {
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010052 ret = 1;
53 }
54#endif
55
Achin Gupta3e1f1972019-10-11 15:49:00 +010056#if defined(SPD_spmd)
57 if (spmd_setup() != 0) {
58 ret = 1;
59 }
60#endif
61
Jeenu Viswambharan04e3a7f2017-10-16 08:43:14 +010062#if SDEI_SUPPORT
63 /* SDEI initialisation */
64 sdei_init();
65#endif
66
Jimmy Brisson26c5b5c2020-06-22 14:18:42 -050067 trng_setup();
68
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010069 return ret;
Soby Mathew8da89662016-09-19 17:21:15 +010070}
71
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000072/*
73 * Top-level Standard Service SMC handler. This handler will in turn dispatch
74 * calls to PSCI SMC handler
75 */
Roberto Vargas05712702018-02-12 12:36:17 +000076static uintptr_t std_svc_smc_handler(uint32_t smc_fid,
Soby Mathewa0fedc42016-06-16 14:52:04 +010077 u_register_t x1,
78 u_register_t x2,
79 u_register_t x3,
80 u_register_t x4,
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000081 void *cookie,
82 void *handle,
Soby Mathewa0fedc42016-06-16 14:52:04 +010083 u_register_t flags)
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000084{
85 /*
86 * Dispatch PSCI calls to PSCI SMC handler and return its return
87 * value
88 */
89 if (is_psci_fid(smc_fid)) {
dp-arm3cac7862016-09-19 11:18:44 +010090 uint64_t ret;
91
92#if ENABLE_RUNTIME_INSTRUMENTATION
dp-armc93e21f2016-10-31 17:17:21 +000093
94 /*
95 * Flush cache line so that even if CPU power down happens
96 * the timestamp update is reflected in memory.
97 */
dp-arm3cac7862016-09-19 11:18:44 +010098 PMF_WRITE_TIMESTAMP(rt_instr_svc,
99 RT_INSTR_ENTER_PSCI,
dp-armc93e21f2016-10-31 17:17:21 +0000100 PMF_CACHE_MAINT,
dp-arm3cac7862016-09-19 11:18:44 +0100101 get_cpu_data(cpu_data_pmf_ts[CPU_DATA_PMF_TS0_IDX]));
102#endif
103
104 ret = psci_smc_handler(smc_fid, x1, x2, x3, x4,
105 cookie, handle, flags);
106
107#if ENABLE_RUNTIME_INSTRUMENTATION
108 PMF_CAPTURE_TIMESTAMP(rt_instr_svc,
109 RT_INSTR_EXIT_PSCI,
110 PMF_NO_CACHE_MAINT);
111#endif
112
113 SMC_RET1(handle, ret);
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +0000114 }
Antonio Nino Diazc41f2062017-10-24 10:07:35 +0100115
Paul Beesleyfe975b42019-09-16 11:29:03 +0000116#if SPM_MM
Antonio Nino Diazc41f2062017-10-24 10:07:35 +0100117 /*
118 * Dispatch SPM calls to SPM SMC handler and return its return
119 * value
120 */
Paul Beesleye9754e62019-10-15 12:51:55 +0000121 if (is_spm_mm_fid(smc_fid)) {
122 return spm_mm_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
123 handle, flags);
Antonio Nino Diazc41f2062017-10-24 10:07:35 +0100124 }
125#endif
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +0000126
Achin Gupta3e1f1972019-10-11 15:49:00 +0100127#if defined(SPD_spmd)
128 /*
J-Alves2672cde2020-05-07 18:42:25 +0100129 * Dispatch FFA calls to the FFA SMC handler implemented by the SPM
Achin Gupta3e1f1972019-10-11 15:49:00 +0100130 * dispatcher and return its return value
131 */
J-Alves2672cde2020-05-07 18:42:25 +0100132 if (is_ffa_fid(smc_fid)) {
Achin Gupta3e1f1972019-10-11 15:49:00 +0100133 return spmd_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
134 handle, flags);
135 }
136#endif
137
Jeenu Viswambharan04e3a7f2017-10-16 08:43:14 +0100138#if SDEI_SUPPORT
139 if (is_sdei_fid(smc_fid)) {
140 return sdei_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
141 flags);
142 }
143#endif
144
Andre Przywara56f55c92021-02-10 16:40:24 +0000145#if TRNG_SUPPORT
Jimmy Brisson26c5b5c2020-06-22 14:18:42 -0500146 if (is_trng_fid(smc_fid)) {
147 return trng_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
148 flags);
149 }
Andre Przywara56f55c92021-02-10 16:40:24 +0000150#endif
Jimmy Brisson26c5b5c2020-06-22 14:18:42 -0500151
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +0000152 switch (smc_fid) {
153 case ARM_STD_SVC_CALL_COUNT:
154 /*
155 * Return the number of Standard Service Calls. PSCI is the only
156 * standard service implemented; so return number of PSCI calls
157 */
158 SMC_RET1(handle, PSCI_NUM_CALLS);
159
160 case ARM_STD_SVC_UID:
161 /* Return UID to the caller */
162 SMC_UUID_RET(handle, arm_svc_uid);
163
164 case ARM_STD_SVC_VERSION:
165 /* Return the version of current implementation */
166 SMC_RET2(handle, STD_SVC_VERSION_MAJOR, STD_SVC_VERSION_MINOR);
167
168 default:
169 WARN("Unimplemented Standard Service Call: 0x%x \n", smc_fid);
170 SMC_RET1(handle, SMC_UNK);
171 }
172}
173
174/* Register Standard Service Calls as runtime service */
175DECLARE_RT_SVC(
176 std_svc,
177
178 OEN_STD_START,
179 OEN_STD_END,
180 SMC_TYPE_FAST,
Soby Mathew8da89662016-09-19 17:21:15 +0100181 std_svc_setup,
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +0000182 std_svc_smc_handler
183);