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) 2022-2024, 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 "ipi_mailbox_svc.h" 21 #include "plat_private.h" 22 #include "pm_svc_main.h" 23 24 /* SMC function IDs for SiP Service queries */ 25 #define SIP_SVC_UID (0x8200ff01U) 26 #define SIP_SVC_VERSION (0x8200ff03U) 27 28 /* SiP Service Calls version numbers */ 29 #define SIP_SVC_VERSION_MAJOR (0U) 30 #define SIP_SVC_VERSION_MINOR (1U) 31 32 /* These macros are used to identify PM calls from the SMC function ID */ 33 #define SIP_FID_MASK GENMASK(23, 16) 34 #define XLNX_FID_MASK GENMASK(23, 12) 35 #define PM_FID_VALUE 0u 36 #define IPI_FID_VALUE 0x1000u 37 #define is_pm_fid(_fid) (((_fid) & XLNX_FID_MASK) == PM_FID_VALUE) 38 #define is_ipi_fid(_fid) (((_fid) & XLNX_FID_MASK) == IPI_FID_VALUE) 39 40 /* SiP Service UUID */ 41 DEFINE_SVC_UUID2(_sip_uuid, 42 0x0499eb70, 0x5ed0, 0x11ee, 0xb3, 0x0a, 43 0x87, 0xd1, 0x1d, 0x4f, 0x8a, 0x9b); 44 45 /** 46 * sip_svc_setup() - Setup SiP Service 47 * 48 * Return: 0 on success, negative error code on failure. 49 * 50 */ 51 static int32_t sip_svc_setup(void) 52 { 53 return sip_svc_setup_init(); 54 } 55 56 /* 57 * sip_svc_smc_handler() - Top-level SiP Service SMC handler 58 * 59 * Handler for all SiP SMC calls. Handles standard SIP requests 60 * and calls PM SMC handler if the call is for a PM-API function. 61 */ 62 static uintptr_t sip_svc_smc_handler(uint32_t smc_fid, 63 u_register_t x1, 64 u_register_t x2, 65 u_register_t x3, 66 u_register_t x4, 67 void *cookie, 68 void *handle, 69 u_register_t flags) 70 { 71 VERBOSE("SMCID: 0x%08x, x1: 0x%016" PRIx64 ", x2: 0x%016" PRIx64 ", x3: 0x%016" PRIx64 ", x4: 0x%016" PRIx64 "\n", 72 smc_fid, x1, x2, x3, x4); 73 74 if ((smc_fid & SIP_FID_MASK) != 0) { 75 WARN("SMC out of SiP assinged range: 0x%x\n", smc_fid); 76 SMC_RET1(handle, SMC_UNK); 77 } 78 79 /* Let PM SMC handler deal with PM-related requests */ 80 if (is_pm_fid(smc_fid)) { 81 return smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, flags); 82 } 83 84 /* Let IPI SMC handler deal with IPI-related requests if platform */ 85 if (is_ipi_fid(smc_fid)) { 86 return ipi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, flags); 87 } 88 89 /* Let PM SMC handler deal with PM-related requests */ 90 switch (smc_fid) { 91 case SIP_SVC_UID: 92 SMC_UUID_RET(handle, _sip_uuid); 93 94 case SIP_SVC_VERSION: 95 SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR); 96 97 case SIP_SCMI: 98 if (platform_id != EMU) { 99 scmi_smt_fastcall_smc_entry(0); 100 SMC_RET1(handle, 0); 101 } 102 WARN("SCMI is not working on EMU\n"); 103 SMC_RET1(handle, SMC_UNK); 104 default: 105 WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid); 106 SMC_RET1(handle, SMC_UNK); 107 } 108 } 109 110 /* Register PM Service Calls as runtime service */ 111 DECLARE_RT_SVC( 112 sip_svc, 113 OEN_SIP_START, 114 OEN_SIP_END, 115 SMC_TYPE_FAST, 116 sip_svc_setup, 117 sip_svc_smc_handler); 118