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155 lines
3.3 KiB
155 lines
3.3 KiB
/*
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* Copyright (c) 2014-2019, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <assert.h>
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#include <stdint.h>
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#include <common/debug.h>
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#include <common/runtime_svc.h>
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#include <lib/el3_runtime/cpu_data.h>
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#include <lib/pmf/pmf.h>
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#include <lib/psci/psci.h>
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#include <lib/runtime_instr.h>
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#include <services/sdei.h>
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#include <services/spm_svc.h>
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#include <services/std_svc.h>
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#include <smccc_helpers.h>
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#include <tools_share/uuid.h>
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/* Standard Service UUID */
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static uuid_t arm_svc_uid = {
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{0x5b, 0x90, 0x8d, 0x10},
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{0x63, 0xf8},
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{0xe8, 0x47},
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0xae, 0x2d,
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{0xc0, 0xfb, 0x56, 0x41, 0xf6, 0xe2}
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};
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/* Setup Standard Services */
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static int32_t std_svc_setup(void)
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{
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uintptr_t svc_arg;
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int ret = 0;
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svc_arg = get_arm_std_svc_args(PSCI_FID_MASK);
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assert(svc_arg);
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/*
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* PSCI is one of the specifications implemented as a Standard Service.
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* The `psci_setup()` also does EL3 architectural setup.
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*/
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if (psci_setup((const psci_lib_args_t *)svc_arg) != PSCI_E_SUCCESS) {
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ret = 1;
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}
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#if ENABLE_SPM
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if (spm_setup() != 0) {
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ret = 1;
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}
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#endif
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#if SDEI_SUPPORT
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/* SDEI initialisation */
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sdei_init();
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#endif
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return ret;
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}
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/*
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* Top-level Standard Service SMC handler. This handler will in turn dispatch
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* calls to PSCI SMC handler
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*/
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static uintptr_t std_svc_smc_handler(uint32_t smc_fid,
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u_register_t x1,
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u_register_t x2,
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u_register_t x3,
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u_register_t x4,
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void *cookie,
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void *handle,
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u_register_t flags)
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{
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/*
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* Dispatch PSCI calls to PSCI SMC handler and return its return
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* value
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*/
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if (is_psci_fid(smc_fid)) {
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uint64_t ret;
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#if ENABLE_RUNTIME_INSTRUMENTATION
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/*
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* Flush cache line so that even if CPU power down happens
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* the timestamp update is reflected in memory.
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*/
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PMF_WRITE_TIMESTAMP(rt_instr_svc,
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RT_INSTR_ENTER_PSCI,
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PMF_CACHE_MAINT,
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get_cpu_data(cpu_data_pmf_ts[CPU_DATA_PMF_TS0_IDX]));
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#endif
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ret = psci_smc_handler(smc_fid, x1, x2, x3, x4,
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cookie, handle, flags);
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#if ENABLE_RUNTIME_INSTRUMENTATION
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PMF_CAPTURE_TIMESTAMP(rt_instr_svc,
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RT_INSTR_EXIT_PSCI,
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PMF_NO_CACHE_MAINT);
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#endif
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SMC_RET1(handle, ret);
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}
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#if ENABLE_SPM && SPM_MM
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/*
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* Dispatch SPM calls to SPM SMC handler and return its return
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* value
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*/
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if (is_spm_fid(smc_fid)) {
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return spm_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
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handle, flags);
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}
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#endif
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#if SDEI_SUPPORT
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if (is_sdei_fid(smc_fid)) {
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return sdei_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
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flags);
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}
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#endif
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switch (smc_fid) {
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case ARM_STD_SVC_CALL_COUNT:
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/*
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* Return the number of Standard Service Calls. PSCI is the only
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* standard service implemented; so return number of PSCI calls
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*/
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SMC_RET1(handle, PSCI_NUM_CALLS);
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case ARM_STD_SVC_UID:
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/* Return UID to the caller */
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SMC_UUID_RET(handle, arm_svc_uid);
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case ARM_STD_SVC_VERSION:
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/* Return the version of current implementation */
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SMC_RET2(handle, STD_SVC_VERSION_MAJOR, STD_SVC_VERSION_MINOR);
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default:
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WARN("Unimplemented Standard Service Call: 0x%x \n", smc_fid);
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SMC_RET1(handle, SMC_UNK);
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}
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}
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/* Register Standard Service Calls as runtime service */
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DECLARE_RT_SVC(
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std_svc,
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OEN_STD_START,
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OEN_STD_END,
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SMC_TYPE_FAST,
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std_svc_setup,
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std_svc_smc_handler
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);
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