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_CALL_COUNT (0x8200ff00U) 24 #define VERSAL_NET_SIP_SVC_UID (0x8200ff01U) 25 #define VERSAL_NET_SIP_SVC_VERSION (0x8200ff03U) 26 27 /* SiP Service Calls version numbers */ 28 #define SIP_SVC_VERSION_MAJOR (0U) 29 #define SIP_SVC_VERSION_MINOR (1U) 30 31 /* These macros are used to identify PM calls from the SMC function ID */ 32 #define SIP_FID_MASK GENMASK(23, 16) 33 #define XLNX_FID_MASK GENMASK(23, 12) 34 #define PM_FID_VALUE 0u 35 #define IPI_FID_VALUE 0x1000u 36 #define is_pm_fid(_fid) (((_fid) & XLNX_FID_MASK) == PM_FID_VALUE) 37 #define is_ipi_fid(_fid) (((_fid) & XLNX_FID_MASK) == IPI_FID_VALUE) 38 39 /* SiP Service UUID */ 40 DEFINE_SVC_UUID2(versal_net_sip_uuid, 41 0x80d4c25a, 0xebaf, 0x11eb, 0x94, 0x68, 42 0x0b, 0x4e, 0x3b, 0x8f, 0xc3, 0x60); 43 44 /** 45 * sip_svc_setup() - Setup SiP Service 46 */ 47 static int32_t sip_svc_setup(void) 48 { 49 return sip_svc_setup_init(); 50 } 51 52 /* 53 * sip_svc_smc_handler() - Top-level SiP Service SMC handler 54 * 55 * Handler for all SiP SMC calls. Handles standard SIP requests 56 * and calls PM SMC handler if the call is for a PM-API function. 57 */ 58 static uintptr_t sip_svc_smc_handler(uint32_t smc_fid, 59 u_register_t x1, 60 u_register_t x2, 61 u_register_t x3, 62 u_register_t x4, 63 void *cookie, 64 void *handle, 65 u_register_t flags) 66 { 67 VERBOSE("SMCID: 0x%08x, x1: 0x%016" PRIx64 ", x2: 0x%016" PRIx64 ", x3: 0x%016" PRIx64 ", x4: 0x%016" PRIx64 "\n", 68 smc_fid, x1, x2, x3, x4); 69 70 if (smc_fid & SIP_FID_MASK) { 71 WARN("SMC out of SiP assinged range: 0x%x\n", smc_fid); 72 SMC_RET1(handle, SMC_UNK); 73 } 74 75 /* Let PM SMC handler deal with PM-related requests */ 76 if (is_pm_fid(smc_fid)) { 77 return smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 78 flags); 79 } 80 81 /* Let IPI SMC handler deal with IPI-related requests if platform */ 82 if (is_ipi_fid(smc_fid)) { 83 return ipi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, flags); 84 } 85 86 /* Let PM SMC handler deal with PM-related requests */ 87 switch (smc_fid) { 88 case VERSAL_NET_SIP_SVC_CALL_COUNT: 89 /* PM functions + default functions */ 90 SMC_RET1(handle, 2); 91 92 case VERSAL_NET_SIP_SVC_UID: 93 SMC_UUID_RET(handle, versal_net_sip_uuid); 94 95 case VERSAL_NET_SIP_SVC_VERSION: 96 SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR); 97 98 default: 99 WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid); 100 SMC_RET1(handle, SMC_UNK); 101 } 102 } 103 104 /* Register PM Service Calls as runtime service */ 105 DECLARE_RT_SVC( 106 sip_svc, 107 OEN_SIP_START, 108 OEN_SIP_END, 109 SMC_TYPE_FAST, 110 sip_svc_setup, 111 sip_svc_smc_handler); 112