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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 */
Roberto Vargaseace8f12018-04-26 13:36:53 +010022static uuid_t arm_svc_uid = {
23 {0x5b, 0x90, 0x8d, 0x10},
24 {0x63, 0xf8},
25 {0xe8, 0x47},
26 0xae, 0x2d,
27 {0xc0, 0xfb, 0x56, 0x41, 0xf6, 0xe2}
28};
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000029
Soby Mathew8da89662016-09-19 17:21:15 +010030/* Setup Standard Services */
31static int32_t std_svc_setup(void)
32{
33 uintptr_t svc_arg;
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010034 int ret = 0;
Soby Mathew8da89662016-09-19 17:21:15 +010035
36 svc_arg = get_arm_std_svc_args(PSCI_FID_MASK);
37 assert(svc_arg);
38
39 /*
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010040 * PSCI is one of the specifications implemented as a Standard Service.
Soby Mathew8da89662016-09-19 17:21:15 +010041 * The `psci_setup()` also does EL3 architectural setup.
42 */
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010043 if (psci_setup((const psci_lib_args_t *)svc_arg) != PSCI_E_SUCCESS) {
44 ret = 1;
45 }
46
47#if ENABLE_SPM
48 if (spm_setup() != 0) {
49 ret = 1;
50 }
51#endif
52
Jeenu Viswambharan04e3a7f2017-10-16 08:43:14 +010053#if SDEI_SUPPORT
54 /* SDEI initialisation */
55 sdei_init();
56#endif
57
Antonio Nino Diazc41f2062017-10-24 10:07:35 +010058 return ret;
Soby Mathew8da89662016-09-19 17:21:15 +010059}
60
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000061/*
62 * Top-level Standard Service SMC handler. This handler will in turn dispatch
63 * calls to PSCI SMC handler
64 */
Roberto Vargas05712702018-02-12 12:36:17 +000065static uintptr_t std_svc_smc_handler(uint32_t smc_fid,
Soby Mathewa0fedc42016-06-16 14:52:04 +010066 u_register_t x1,
67 u_register_t x2,
68 u_register_t x3,
69 u_register_t x4,
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000070 void *cookie,
71 void *handle,
Soby Mathewa0fedc42016-06-16 14:52:04 +010072 u_register_t flags)
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +000073{
74 /*
75 * Dispatch PSCI calls to PSCI SMC handler and return its return
76 * value
77 */
78 if (is_psci_fid(smc_fid)) {
dp-arm3cac7862016-09-19 11:18:44 +010079 uint64_t ret;
80
81#if ENABLE_RUNTIME_INSTRUMENTATION
dp-armc93e21f2016-10-31 17:17:21 +000082
83 /*
84 * Flush cache line so that even if CPU power down happens
85 * the timestamp update is reflected in memory.
86 */
dp-arm3cac7862016-09-19 11:18:44 +010087 PMF_WRITE_TIMESTAMP(rt_instr_svc,
88 RT_INSTR_ENTER_PSCI,
dp-armc93e21f2016-10-31 17:17:21 +000089 PMF_CACHE_MAINT,
dp-arm3cac7862016-09-19 11:18:44 +010090 get_cpu_data(cpu_data_pmf_ts[CPU_DATA_PMF_TS0_IDX]));
91#endif
92
93 ret = psci_smc_handler(smc_fid, x1, x2, x3, x4,
94 cookie, handle, flags);
95
96#if ENABLE_RUNTIME_INSTRUMENTATION
97 PMF_CAPTURE_TIMESTAMP(rt_instr_svc,
98 RT_INSTR_EXIT_PSCI,
99 PMF_NO_CACHE_MAINT);
100#endif
101
102 SMC_RET1(handle, ret);
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +0000103 }
Antonio Nino Diazc41f2062017-10-24 10:07:35 +0100104
Antonio Nino Diazb05de3f2018-11-30 10:53:26 +0000105#if ENABLE_SPM && SPM_DEPRECATED
Antonio Nino Diazc41f2062017-10-24 10:07:35 +0100106 /*
107 * Dispatch SPM calls to SPM SMC handler and return its return
108 * value
109 */
110 if (is_spm_fid(smc_fid)) {
111 return spm_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
112 handle, flags);
113 }
114#endif
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +0000115
Jeenu Viswambharan04e3a7f2017-10-16 08:43:14 +0100116#if SDEI_SUPPORT
117 if (is_sdei_fid(smc_fid)) {
118 return sdei_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
119 flags);
120 }
121#endif
122
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +0000123 switch (smc_fid) {
124 case ARM_STD_SVC_CALL_COUNT:
125 /*
126 * Return the number of Standard Service Calls. PSCI is the only
127 * standard service implemented; so return number of PSCI calls
128 */
129 SMC_RET1(handle, PSCI_NUM_CALLS);
130
131 case ARM_STD_SVC_UID:
132 /* Return UID to the caller */
133 SMC_UUID_RET(handle, arm_svc_uid);
134
135 case ARM_STD_SVC_VERSION:
136 /* Return the version of current implementation */
137 SMC_RET2(handle, STD_SVC_VERSION_MAJOR, STD_SVC_VERSION_MINOR);
138
139 default:
140 WARN("Unimplemented Standard Service Call: 0x%x \n", smc_fid);
141 SMC_RET1(handle, SMC_UNK);
142 }
143}
144
145/* Register Standard Service Calls as runtime service */
146DECLARE_RT_SVC(
147 std_svc,
148
149 OEN_STD_START,
150 OEN_STD_END,
151 SMC_TYPE_FAST,
Soby Mathew8da89662016-09-19 17:21:15 +0100152 std_svc_setup,
Jeenu Viswambharan1814a3e2014-02-28 10:08:33 +0000153 std_svc_smc_handler
154);