1 /* 2 * Copyright (c) 2018-2019, Arm Limited and Contributors. All rights reserved. 3 * Copyright (c) 2018-2022, Xilinx, Inc. All rights reserved. 4 * Copyright (c) 2022-2025, Advanced Micro Devices, Inc. All rights reserved. 5 * 6 * SPDX-License-Identifier: BSD-3-Clause 7 */ 8 9 /* Top level SMC handler for SiP calls. Dispatch PM calls to PM SMC handler. */ 10 11 #include <errno.h> 12 #include <inttypes.h> 13 14 #include <common/debug.h> 15 #include <common/runtime_svc.h> 16 #include <drivers/scmi-msg.h> 17 #include <scmi.h> 18 #include <tools_share/uuid.h> 19 20 #include <custom_svc.h> 21 #include "ipi_mailbox_svc.h" 22 #include "plat_private.h" 23 #include "pm_svc_main.h" 24 25 /* SMC function IDs for SiP Service queries */ 26 #define SIP_SVC_UID (0x8200ff01U) 27 #define SIP_SVC_VERSION (0x8200ff03U) 28 29 /* SiP Service Calls version numbers */ 30 #define SIP_SVC_VERSION_MAJOR (0U) 31 #define SIP_SVC_VERSION_MINOR (2U) 32 33 /* These macros are used to identify PM calls from the SMC function ID */ 34 #define SIP_FID_MASK GENMASK(23, 16) 35 #define XLNX_FID_MASK GENMASK(23, 12) 36 #define PM_FID_VALUE 0u 37 #define IPI_FID_VALUE 0x1000u 38 #define is_pm_fid(_fid) (((_fid) & XLNX_FID_MASK) == PM_FID_VALUE) 39 #define is_ipi_fid(_fid) (((_fid) & XLNX_FID_MASK) == IPI_FID_VALUE) 40 41 /* SiP Service UUID */ 42 DEFINE_SVC_UUID2(_sip_uuid, 43 0x0499eb70, 0x5ed0, 0x11ee, 0xb3, 0x0a, 44 0x87, 0xd1, 0x1d, 0x4f, 0x8a, 0x9b); 45 46 /** 47 * sip_svc_setup() - Setup SiP Service 48 * 49 * Return: 0 on success, negative error code on failure. 50 * 51 */ 52 static int32_t sip_svc_setup(void) 53 { 54 return sip_svc_setup_init(); 55 } 56 57 /* 58 * sip_svc_smc_handler() - Top-level SiP Service SMC handler 59 * 60 * Handler for all SiP SMC calls. Handles standard SIP requests 61 * and calls PM SMC handler if the call is for a PM-API function. 62 */ 63 static uintptr_t sip_svc_smc_handler(uint32_t smc_fid, 64 u_register_t x1, 65 u_register_t x2, 66 u_register_t x3, 67 u_register_t x4, 68 void *cookie, 69 void *handle, 70 u_register_t flags) 71 { 72 VERBOSE("SMCID: 0x%08x, x1: 0x%016" PRIx64 ", x2: 0x%016" PRIx64 ", x3: 0x%016" PRIx64 ", x4: 0x%016" PRIx64 "\n", 73 smc_fid, x1, x2, x3, x4); 74 75 if ((smc_fid & SIP_FID_MASK) != 0U) { 76 WARN("SMC out of SiP assinged range: 0x%x\n", smc_fid); 77 SMC_RET1(handle, SMC_UNK); 78 } 79 80 /* Let PM SMC handler deal with PM-related requests */ 81 if (is_pm_fid(smc_fid)) { 82 return smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, flags); 83 } 84 85 /* Let IPI SMC handler deal with IPI-related requests if platform */ 86 if (is_ipi_fid(smc_fid)) { 87 return ipi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, flags); 88 } 89 90 /* Let PM SMC handler deal with PM-related requests */ 91 switch (smc_fid) { 92 case SIP_SVC_UID: 93 SMC_UUID_RET(handle, _sip_uuid); 94 95 case SIP_SVC_VERSION: 96 SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR); 97 98 #if (TFA_NO_PM == 1) 99 case SIP_SCMI: 100 if (platform_id != EMU) { 101 scmi_smt_fastcall_smc_entry(0); 102 SMC_RET1(handle, 0); 103 } 104 WARN("SCMI is not working on EMU\n"); 105 SMC_RET1(handle, SMC_UNK); 106 #endif 107 case SOC_SIP_SVC_CUSTOM: 108 case SOC_SIP_SVC64_CUSTOM: 109 return custom_smc_handler(smc_fid, x1, x2, x3, x4, 110 cookie, handle, flags); 111 default: 112 WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid); 113 SMC_RET1(handle, SMC_UNK); 114 } 115 } 116 117 /* Register PM Service Calls as runtime service */ 118 DECLARE_RT_SVC( 119 sip_svc, 120 OEN_SIP_START, 121 OEN_SIP_END, 122 SMC_TYPE_FAST, 123 sip_svc_setup, 124 sip_svc_smc_handler); 125