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, 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 <tools_share/uuid.h> 17 18 #include "ipi_mailbox_svc.h" 19 #include "plat_private.h" 20 #include "pm_svc_main.h" 21 22 /* SMC function IDs for SiP Service queries */ 23 #define VERSAL_NET_SIP_SVC_UID (0x8200ff01U) 24 #define VERSAL_NET_SIP_SVC_VERSION (0x8200ff03U) 25 26 /* SiP Service Calls version numbers */ 27 #define SIP_SVC_VERSION_MAJOR (0U) 28 #define SIP_SVC_VERSION_MINOR (1U) 29 30 /* These macros are used to identify PM calls from the SMC function ID */ 31 #define SIP_FID_MASK GENMASK(23, 16) 32 #define XLNX_FID_MASK GENMASK(23, 12) 33 #define PM_FID_VALUE 0u 34 #define IPI_FID_VALUE 0x1000u 35 #define is_pm_fid(_fid) (((_fid) & XLNX_FID_MASK) == PM_FID_VALUE) 36 #define is_ipi_fid(_fid) (((_fid) & XLNX_FID_MASK) == IPI_FID_VALUE) 37 38 /* SiP Service UUID */ 39 DEFINE_SVC_UUID2(versal_net_sip_uuid, 40 0x80d4c25a, 0xebaf, 0x11eb, 0x94, 0x68, 41 0x0b, 0x4e, 0x3b, 0x8f, 0xc3, 0x60); 42 43 /** 44 * sip_svc_setup() - Setup SiP Service 45 * 46 * Return: 0 on success, negative error code on failure. 47 * 48 */ 49 static int32_t sip_svc_setup(void) 50 { 51 return sip_svc_setup_init(); 52 } 53 54 /* 55 * sip_svc_smc_handler() - Top-level SiP Service SMC handler 56 * 57 * Handler for all SiP SMC calls. Handles standard SIP requests 58 * and calls PM SMC handler if the call is for a PM-API function. 59 */ 60 static uintptr_t sip_svc_smc_handler(uint32_t smc_fid, 61 u_register_t x1, 62 u_register_t x2, 63 u_register_t x3, 64 u_register_t x4, 65 void *cookie, 66 void *handle, 67 u_register_t flags) 68 { 69 VERBOSE("SMCID: 0x%08x, x1: 0x%016" PRIx64 ", x2: 0x%016" PRIx64 ", x3: 0x%016" PRIx64 ", x4: 0x%016" PRIx64 "\n", 70 smc_fid, x1, x2, x3, x4); 71 72 if (smc_fid & SIP_FID_MASK) { 73 WARN("SMC out of SiP assinged range: 0x%x\n", smc_fid); 74 SMC_RET1(handle, SMC_UNK); 75 } 76 77 /* Let PM SMC handler deal with PM-related requests */ 78 if (is_pm_fid(smc_fid)) { 79 return smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 80 flags); 81 } 82 83 /* Let IPI SMC handler deal with IPI-related requests if platform */ 84 if (is_ipi_fid(smc_fid)) { 85 return ipi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, flags); 86 } 87 88 /* Let PM SMC handler deal with PM-related requests */ 89 switch (smc_fid) { 90 case VERSAL_NET_SIP_SVC_UID: 91 SMC_UUID_RET(handle, versal_net_sip_uuid); 92 93 case VERSAL_NET_SIP_SVC_VERSION: 94 SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR); 95 96 default: 97 WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid); 98 SMC_RET1(handle, SMC_UNK); 99 } 100 } 101 102 /* Register PM Service Calls as runtime service */ 103 DECLARE_RT_SVC( 104 sip_svc, 105 OEN_SIP_START, 106 OEN_SIP_END, 107 SMC_TYPE_FAST, 108 sip_svc_setup, 109 sip_svc_smc_handler); 110