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Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +00001/*
Antonio Nino Diazcbccdbf2019-01-21 11:53:29 +00002 * Copyright (c) 2014-2019, 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>
17#include <services/spm_svc.h>
18#include <services/std_svc.h>
19#include <smccc_helpers.h>
20#include <tools_share/uuid.h>
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000021
22/* Standard Service UUID */
Roberto Vargaseace8f12018-04-26 13:36:53 +010023static uuid_t arm_svc_uid = {
24 {0x5b, 0x90, 0x8d, 0x10},
25 {0x63, 0xf8},
26 {0xe8, 0x47},
27 0xae, 0x2d,
28 {0xc0, 0xfb, 0x56, 0x41, 0xf6, 0xe2}
29};
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000030
Soby Mathew8da89662016-09-19 17:21:15 +010031/* Setup Standard Services */
32static int32_t std_svc_setup(void)
33{
34 uintptr_t svc_arg;
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010035 int ret = 0;
Soby Mathew8da89662016-09-19 17:21:15 +010036
37 svc_arg = get_arm_std_svc_args(PSCI_FID_MASK);
38 assert(svc_arg);
39
40 /*
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010041 * PSCI is one of the specifications implemented as a Standard Service.
Soby Mathew8da89662016-09-19 17:21:15 +010042 * The `psci_setup()` also does EL3 architectural setup.
43 */
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010044 if (psci_setup((const psci_lib_args_t *)svc_arg) != PSCI_E_SUCCESS) {
45 ret = 1;
46 }
47
48#if ENABLE_SPM
49 if (spm_setup() != 0) {
50 ret = 1;
51 }
52#endif
53
Jeenu Viswambharan04e3a7f2017-10-16 08:43:14 +010054#if SDEI_SUPPORT
55 /* SDEI initialisation */
56 sdei_init();
57#endif
58
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010059 return ret;
Soby Mathew8da89662016-09-19 17:21:15 +010060}
61
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000062/*
63 * Top-level Standard Service SMC handler. This handler will in turn dispatch
64 * calls to PSCI SMC handler
65 */
Roberto Vargas05712702018-02-12 12:36:17 +000066static uintptr_t std_svc_smc_handler(uint32_t smc_fid,
Soby Mathewa0fedc42016-06-16 14:52:04 +010067 u_register_t x1,
68 u_register_t x2,
69 u_register_t x3,
70 u_register_t x4,
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000071 void *cookie,
72 void *handle,
Soby Mathewa0fedc42016-06-16 14:52:04 +010073 u_register_t flags)
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000074{
75 /*
76 * Dispatch PSCI calls to PSCI SMC handler and return its return
77 * value
78 */
79 if (is_psci_fid(smc_fid)) {
dp-arm3cac7862016-09-19 11:18:44 +010080 uint64_t ret;
81
82#if ENABLE_RUNTIME_INSTRUMENTATION
dp-armc93e21f2016-10-31 17:17:21 +000083
84 /*
85 * Flush cache line so that even if CPU power down happens
86 * the timestamp update is reflected in memory.
87 */
dp-arm3cac7862016-09-19 11:18:44 +010088 PMF_WRITE_TIMESTAMP(rt_instr_svc,
89 RT_INSTR_ENTER_PSCI,
dp-armc93e21f2016-10-31 17:17:21 +000090 PMF_CACHE_MAINT,
dp-arm3cac7862016-09-19 11:18:44 +010091 get_cpu_data(cpu_data_pmf_ts[CPU_DATA_PMF_TS0_IDX]));
92#endif
93
94 ret = psci_smc_handler(smc_fid, x1, x2, x3, x4,
95 cookie, handle, flags);
96
97#if ENABLE_RUNTIME_INSTRUMENTATION
98 PMF_CAPTURE_TIMESTAMP(rt_instr_svc,
99 RT_INSTR_EXIT_PSCI,
100 PMF_NO_CACHE_MAINT);
101#endif
102
103 SMC_RET1(handle, ret);
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +0000104 }
Antonio Nino Diazc41f2062017-10-24 10:07:35 +0100105
Antonio Nino Diazcbccdbf2019-01-21 11:53:29 +0000106#if ENABLE_SPM && SPM_MM
Antonio Nino Diazc41f2062017-10-24 10:07:35 +0100107 /*
108 * Dispatch SPM calls to SPM SMC handler and return its return
109 * value
110 */
111 if (is_spm_fid(smc_fid)) {
112 return spm_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
113 handle, flags);
114 }
115#endif
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +0000116
Jeenu Viswambharan04e3a7f2017-10-16 08:43:14 +0100117#if SDEI_SUPPORT
118 if (is_sdei_fid(smc_fid)) {
119 return sdei_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
120 flags);
121 }
122#endif
123
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +0000124 switch (smc_fid) {
125 case ARM_STD_SVC_CALL_COUNT:
126 /*
127 * Return the number of Standard Service Calls. PSCI is the only
128 * standard service implemented; so return number of PSCI calls
129 */
130 SMC_RET1(handle, PSCI_NUM_CALLS);
131
132 case ARM_STD_SVC_UID:
133 /* Return UID to the caller */
134 SMC_UUID_RET(handle, arm_svc_uid);
135
136 case ARM_STD_SVC_VERSION:
137 /* Return the version of current implementation */
138 SMC_RET2(handle, STD_SVC_VERSION_MAJOR, STD_SVC_VERSION_MINOR);
139
140 default:
141 WARN("Unimplemented Standard Service Call: 0x%x \n", smc_fid);
142 SMC_RET1(handle, SMC_UNK);
143 }
144}
145
146/* Register Standard Service Calls as runtime service */
147DECLARE_RT_SVC(
148 std_svc,
149
150 OEN_STD_START,
151 OEN_STD_END,
152 SMC_TYPE_FAST,
Soby Mathew8da89662016-09-19 17:21:15 +0100153 std_svc_setup,
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +0000154 std_svc_smc_handler
155);