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Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +00001/*
Achin Gupta3e1f1972019-10-11 15:49:00 +01002 * Copyright (c) 2014-2020, 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>
20#include <smccc_helpers.h>
21#include <tools_share/uuid.h>
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000022
23/* Standard Service UUID */
Roberto Vargaseace8f12018-04-26 13:36:53 +010024static uuid_t arm_svc_uid = {
25 {0x5b, 0x90, 0x8d, 0x10},
26 {0x63, 0xf8},
27 {0xe8, 0x47},
28 0xae, 0x2d,
29 {0xc0, 0xfb, 0x56, 0x41, 0xf6, 0xe2}
30};
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000031
Soby Mathew8da89662016-09-19 17:21:15 +010032/* Setup Standard Services */
33static int32_t std_svc_setup(void)
34{
35 uintptr_t svc_arg;
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010036 int ret = 0;
Soby Mathew8da89662016-09-19 17:21:15 +010037
38 svc_arg = get_arm_std_svc_args(PSCI_FID_MASK);
39 assert(svc_arg);
40
41 /*
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010042 * PSCI is one of the specifications implemented as a Standard Service.
Soby Mathew8da89662016-09-19 17:21:15 +010043 * The `psci_setup()` also does EL3 architectural setup.
44 */
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010045 if (psci_setup((const psci_lib_args_t *)svc_arg) != PSCI_E_SUCCESS) {
46 ret = 1;
47 }
48
Paul Beesleydb4e25a2019-10-14 15:27:12 +000049#if SPM_MM
Paul Beesleye9754e62019-10-15 12:51:55 +000050 if (spm_mm_setup() != 0) {
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010051 ret = 1;
52 }
53#endif
54
Achin Gupta3e1f1972019-10-11 15:49:00 +010055#if defined(SPD_spmd)
56 if (spmd_setup() != 0) {
57 ret = 1;
58 }
59#endif
60
Jeenu Viswambharan04e3a7f2017-10-16 08:43:14 +010061#if SDEI_SUPPORT
62 /* SDEI initialisation */
63 sdei_init();
64#endif
65
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010066 return ret;
Soby Mathew8da89662016-09-19 17:21:15 +010067}
68
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000069/*
70 * Top-level Standard Service SMC handler. This handler will in turn dispatch
71 * calls to PSCI SMC handler
72 */
Roberto Vargas05712702018-02-12 12:36:17 +000073static uintptr_t std_svc_smc_handler(uint32_t smc_fid,
Soby Mathewa0fedc42016-06-16 14:52:04 +010074 u_register_t x1,
75 u_register_t x2,
76 u_register_t x3,
77 u_register_t x4,
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000078 void *cookie,
79 void *handle,
Soby Mathewa0fedc42016-06-16 14:52:04 +010080 u_register_t flags)
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000081{
82 /*
83 * Dispatch PSCI calls to PSCI SMC handler and return its return
84 * value
85 */
86 if (is_psci_fid(smc_fid)) {
dp-arm3cac7862016-09-19 11:18:44 +010087 uint64_t ret;
88
89#if ENABLE_RUNTIME_INSTRUMENTATION
dp-armc93e21f2016-10-31 17:17:21 +000090
91 /*
92 * Flush cache line so that even if CPU power down happens
93 * the timestamp update is reflected in memory.
94 */
dp-arm3cac7862016-09-19 11:18:44 +010095 PMF_WRITE_TIMESTAMP(rt_instr_svc,
96 RT_INSTR_ENTER_PSCI,
dp-armc93e21f2016-10-31 17:17:21 +000097 PMF_CACHE_MAINT,
dp-arm3cac7862016-09-19 11:18:44 +010098 get_cpu_data(cpu_data_pmf_ts[CPU_DATA_PMF_TS0_IDX]));
99#endif
100
101 ret = psci_smc_handler(smc_fid, x1, x2, x3, x4,
102 cookie, handle, flags);
103
104#if ENABLE_RUNTIME_INSTRUMENTATION
105 PMF_CAPTURE_TIMESTAMP(rt_instr_svc,
106 RT_INSTR_EXIT_PSCI,
107 PMF_NO_CACHE_MAINT);
108#endif
109
110 SMC_RET1(handle, ret);
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +0000111 }
Antonio Nino Diazc41f2062017-10-24 10:07:35 +0100112
Paul Beesleyfe975b42019-09-16 11:29:03 +0000113#if SPM_MM
Antonio Nino Diazc41f2062017-10-24 10:07:35 +0100114 /*
115 * Dispatch SPM calls to SPM SMC handler and return its return
116 * value
117 */
Paul Beesleye9754e62019-10-15 12:51:55 +0000118 if (is_spm_mm_fid(smc_fid)) {
119 return spm_mm_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
120 handle, flags);
Antonio Nino Diazc41f2062017-10-24 10:07:35 +0100121 }
122#endif
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +0000123
Achin Gupta3e1f1972019-10-11 15:49:00 +0100124#if defined(SPD_spmd)
125 /*
126 * Dispatch SPCI calls to the SPCI SMC handler implemented by the SPM
127 * dispatcher and return its return value
128 */
129 if (is_spci_fid(smc_fid)) {
130 return spmd_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
131 handle, flags);
132 }
133#endif
134
Jeenu Viswambharan04e3a7f2017-10-16 08:43:14 +0100135#if SDEI_SUPPORT
136 if (is_sdei_fid(smc_fid)) {
137 return sdei_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
138 flags);
139 }
140#endif
141
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +0000142 switch (smc_fid) {
143 case ARM_STD_SVC_CALL_COUNT:
144 /*
145 * Return the number of Standard Service Calls. PSCI is the only
146 * standard service implemented; so return number of PSCI calls
147 */
148 SMC_RET1(handle, PSCI_NUM_CALLS);
149
150 case ARM_STD_SVC_UID:
151 /* Return UID to the caller */
152 SMC_UUID_RET(handle, arm_svc_uid);
153
154 case ARM_STD_SVC_VERSION:
155 /* Return the version of current implementation */
156 SMC_RET2(handle, STD_SVC_VERSION_MAJOR, STD_SVC_VERSION_MINOR);
157
158 default:
159 WARN("Unimplemented Standard Service Call: 0x%x \n", smc_fid);
160 SMC_RET1(handle, SMC_UNK);
161 }
162}
163
164/* Register Standard Service Calls as runtime service */
165DECLARE_RT_SVC(
166 std_svc,
167
168 OEN_STD_START,
169 OEN_STD_END,
170 SMC_TYPE_FAST,
Soby Mathew8da89662016-09-19 17:21:15 +0100171 std_svc_setup,
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +0000172 std_svc_smc_handler
173);