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121 lines
3.2 KiB
121 lines
3.2 KiB
/*
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* Copyright (c) 2018-2021, Arm Limited and Contributors. All rights reserved.
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* Copyright (c) 2022-2024, Advanced Micro Devices, Inc. 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 <inttypes.h>
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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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#include "ipi_mailbox_svc.h"
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#include "pm_svc_main.h"
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/* SMC function IDs for SiP Service queries */
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#define VERSAL_SIP_SVC_UID U(0x8200ff01)
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#define VERSAL_SIP_SVC_VERSION U(0x8200ff03)
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/* SiP Service Calls version numbers */
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#define SIP_SVC_VERSION_MAJOR U(0)
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#define SIP_SVC_VERSION_MINOR U(2)
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/* These macros are used to identify PM calls from the SMC function ID */
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#define SIP_FID_MASK GENMASK(23, 16)
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#define XLNX_FID_MASK GENMASK(23, 12)
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#define PM_FID_VALUE 0u
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#define IPI_FID_VALUE 0x1000u
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#define is_pm_fid(_fid) (((_fid) & XLNX_FID_MASK) == PM_FID_VALUE)
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#define is_ipi_fid(_fid) (((_fid) & XLNX_FID_MASK) == IPI_FID_VALUE)
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/* SiP Service UUID */
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DEFINE_SVC_UUID2(versal_sip_uuid,
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0x2ab9e4ecU, 0x93b9U, 0x11e7U, 0xa0U, 0x19U,
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0xdfU, 0xe0U, 0xdbU, 0xadU, 0x0aU, 0xe0U);
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/**
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* sip_svc_setup() - Setup SiP Service
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*
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* Return: 0 on success,negative error code on failure.
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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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/* PM implementation as SiP Service */
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(void)pm_setup();
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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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* @smc_fid: Function Identifier.
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* @x1: SMC64 Arguments 1 from kernel.
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* @x2: SMC64 Arguments 2 from kernel.
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* @x3: SMC64 Arguments 3 from kernel(upper 32-bits).
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* @x4: SMC64 Arguments 4 from kernel.
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* @cookie: Unused
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* @handle: Pointer to caller's context structure.
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* @flags: SECURE_FLAG or NON_SECURE_FLAG.
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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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* Return: Unused.
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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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VERBOSE("SMCID: 0x%08x, x1: 0x%016" PRIx64 ", x2: 0x%016" PRIx64 ", x3: 0x%016" PRIx64 ", x4: 0x%016" PRIx64 "\n",
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smc_fid, x1, x2, x3, x4);
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if (smc_fid & SIP_FID_MASK) {
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WARN("SMC out of SiP assinged range: 0x%x\n", smc_fid);
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SMC_RET1(handle, SMC_UNK);
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}
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/* Let PM SMC handler deal with PM-related requests */
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if (is_pm_fid(smc_fid)) {
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return pm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
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flags);
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}
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/* Let IPI SMC handler deal with IPI-related requests */
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if (is_ipi_fid(smc_fid)) {
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return ipi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
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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_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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