83 lines
2.0 KiB
C
83 lines
2.0 KiB
C
/*
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* Copyright (c) 2018, 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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/* Top level SMC handler for SiP calls. Dispatch PM calls to PM SMC handler. */
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#include <common/debug.h>
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#include <common/runtime_svc.h>
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#include <tools_share/uuid.h>
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/* SMC function IDs for SiP Service queries */
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#define VERSAL_SIP_SVC_CALL_COUNT 0x8200ff00
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#define VERSAL_SIP_SVC_UID 0x8200ff01
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#define VERSAL_SIP_SVC_VERSION 0x8200ff03
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/* SiP Service Calls version numbers */
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#define SIP_SVC_VERSION_MAJOR 0
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#define SIP_SVC_VERSION_MINOR 1
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/* These macros are used to identify PM calls from the SMC function ID */
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#define PM_FID_MASK 0xf000u
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#define PM_FID_VALUE 0u
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#define is_pm_fid(_fid) (((_fid) & PM_FID_MASK) == PM_FID_VALUE)
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/* SiP Service UUID */
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DEFINE_SVC_UUID2(versal_sip_uuid,
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0x2ab9e4ec, 0x93b9, 0x11e7, 0xa0, 0x19,
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0xdf, 0xe0, 0xdb, 0xad, 0x0a, 0xe0);
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/**
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* sip_svc_setup() - Setup SiP Service
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*
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* Invokes PM setup
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*/
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static int32_t sip_svc_setup(void)
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{
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return 0;
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}
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/**
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* sip_svc_smc_handler() - Top-level SiP Service SMC handler
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*
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* Handler for all SiP SMC calls. Handles standard SIP requests
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* and calls PM SMC handler if the call is for a PM-API function.
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*/
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uintptr_t sip_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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/* Let PM SMC handler deal with PM-related requests */
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switch (smc_fid) {
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case VERSAL_SIP_SVC_CALL_COUNT:
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/* PM functions + default functions */
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SMC_RET1(handle, 2);
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case VERSAL_SIP_SVC_UID:
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SMC_UUID_RET(handle, versal_sip_uuid);
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case VERSAL_SIP_SVC_VERSION:
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SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR);
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default:
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WARN("Unimplemented SiP 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 PM Service Calls as runtime service */
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DECLARE_RT_SVC(
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sip_svc,
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OEN_SIP_START,
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OEN_SIP_END,
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SMC_TYPE_FAST,
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sip_svc_setup,
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sip_svc_smc_handler);
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