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Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +00001/*
Roberto Vargas05712702018-02-12 12:36:17 +00002 * Copyright (c) 2014-2018, 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>
dp-arm3cac7862016-09-19 11:18:44 +01008#include <cpu_data.h>
Dan Handley2bd4ef22014-04-09 13:14:54 +01009#include <debug.h>
dp-arm3cac7862016-09-19 11:18:44 +010010#include <pmf.h>
Dan Handley2bd4ef22014-04-09 13:14:54 +010011#include <psci.h>
dp-arm3cac7862016-09-19 11:18:44 +010012#include <runtime_instr.h>
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000013#include <runtime_svc.h>
Jeenu Viswambharan04e3a7f2017-10-16 08:43:14 +010014#include <sdei.h>
Antonio Nino Diaz3c817f42018-03-21 10:49:27 +000015#include <smccc_helpers.h>
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010016#include <spm_svc.h>
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000017#include <std_svc.h>
Dan Handley2bd4ef22014-04-09 13:14:54 +010018#include <stdint.h>
19#include <uuid.h>
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000020
21/* Standard Service UUID */
22DEFINE_SVC_UUID(arm_svc_uid,
23 0x108d905b, 0xf863, 0x47e8, 0xae, 0x2d,
24 0xc0, 0xfb, 0x56, 0x41, 0xf6, 0xe2);
25
Soby Mathew8da89662016-09-19 17:21:15 +010026/* Setup Standard Services */
27static int32_t std_svc_setup(void)
28{
29 uintptr_t svc_arg;
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010030 int ret = 0;
Soby Mathew8da89662016-09-19 17:21:15 +010031
32 svc_arg = get_arm_std_svc_args(PSCI_FID_MASK);
33 assert(svc_arg);
34
35 /*
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010036 * PSCI is one of the specifications implemented as a Standard Service.
Soby Mathew8da89662016-09-19 17:21:15 +010037 * The `psci_setup()` also does EL3 architectural setup.
38 */
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010039 if (psci_setup((const psci_lib_args_t *)svc_arg) != PSCI_E_SUCCESS) {
40 ret = 1;
41 }
42
43#if ENABLE_SPM
44 if (spm_setup() != 0) {
45 ret = 1;
46 }
47#endif
48
Jeenu Viswambharan04e3a7f2017-10-16 08:43:14 +010049#if SDEI_SUPPORT
50 /* SDEI initialisation */
51 sdei_init();
52#endif
53
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010054 return ret;
Soby Mathew8da89662016-09-19 17:21:15 +010055}
56
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000057/*
58 * Top-level Standard Service SMC handler. This handler will in turn dispatch
59 * calls to PSCI SMC handler
60 */
Roberto Vargas05712702018-02-12 12:36:17 +000061static uintptr_t std_svc_smc_handler(uint32_t smc_fid,
Soby Mathewa0fedc42016-06-16 14:52:04 +010062 u_register_t x1,
63 u_register_t x2,
64 u_register_t x3,
65 u_register_t x4,
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000066 void *cookie,
67 void *handle,
Soby Mathewa0fedc42016-06-16 14:52:04 +010068 u_register_t flags)
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000069{
70 /*
71 * Dispatch PSCI calls to PSCI SMC handler and return its return
72 * value
73 */
74 if (is_psci_fid(smc_fid)) {
dp-arm3cac7862016-09-19 11:18:44 +010075 uint64_t ret;
76
77#if ENABLE_RUNTIME_INSTRUMENTATION
dp-armc93e21f2016-10-31 17:17:21 +000078
79 /*
80 * Flush cache line so that even if CPU power down happens
81 * the timestamp update is reflected in memory.
82 */
dp-arm3cac7862016-09-19 11:18:44 +010083 PMF_WRITE_TIMESTAMP(rt_instr_svc,
84 RT_INSTR_ENTER_PSCI,
dp-armc93e21f2016-10-31 17:17:21 +000085 PMF_CACHE_MAINT,
dp-arm3cac7862016-09-19 11:18:44 +010086 get_cpu_data(cpu_data_pmf_ts[CPU_DATA_PMF_TS0_IDX]));
87#endif
88
89 ret = psci_smc_handler(smc_fid, x1, x2, x3, x4,
90 cookie, handle, flags);
91
92#if ENABLE_RUNTIME_INSTRUMENTATION
93 PMF_CAPTURE_TIMESTAMP(rt_instr_svc,
94 RT_INSTR_EXIT_PSCI,
95 PMF_NO_CACHE_MAINT);
96#endif
97
98 SMC_RET1(handle, ret);
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000099 }
Antonio Nino Diazc41f2062017-10-24 10:07:35 +0100100
Antonio Nino Diazc41f2062017-10-24 10:07:35 +0100101#if ENABLE_SPM
102 /*
103 * Dispatch SPM calls to SPM SMC handler and return its return
104 * value
105 */
106 if (is_spm_fid(smc_fid)) {
107 return spm_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
108 handle, flags);
109 }
110#endif
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +0000111
Jeenu Viswambharan04e3a7f2017-10-16 08:43:14 +0100112#if SDEI_SUPPORT
113 if (is_sdei_fid(smc_fid)) {
114 return sdei_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
115 flags);
116 }
117#endif
118
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +0000119 switch (smc_fid) {
120 case ARM_STD_SVC_CALL_COUNT:
121 /*
122 * Return the number of Standard Service Calls. PSCI is the only
123 * standard service implemented; so return number of PSCI calls
124 */
125 SMC_RET1(handle, PSCI_NUM_CALLS);
126
127 case ARM_STD_SVC_UID:
128 /* Return UID to the caller */
129 SMC_UUID_RET(handle, arm_svc_uid);
130
131 case ARM_STD_SVC_VERSION:
132 /* Return the version of current implementation */
133 SMC_RET2(handle, STD_SVC_VERSION_MAJOR, STD_SVC_VERSION_MINOR);
134
135 default:
136 WARN("Unimplemented Standard Service Call: 0x%x \n", smc_fid);
137 SMC_RET1(handle, SMC_UNK);
138 }
139}
140
141/* Register Standard Service Calls as runtime service */
142DECLARE_RT_SVC(
143 std_svc,
144
145 OEN_STD_START,
146 OEN_STD_END,
147 SMC_TYPE_FAST,
Soby Mathew8da89662016-09-19 17:21:15 +0100148 std_svc_setup,
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +0000149 std_svc_smc_handler
150);