1 /* 2 * Copyright (c) 2018-2021, Arm Limited and Contributors. All rights reserved. 3 * Copyright (c) 2022-2025, Advanced Micro Devices, Inc. All rights reserved. 4 * 5 * SPDX-License-Identifier: BSD-3-Clause 6 */ 7 8 /* Top level SMC handler for SiP calls. Dispatch PM calls to PM SMC handler. */ 9 10 #include <inttypes.h> 11 12 #include <common/debug.h> 13 #include <common/runtime_svc.h> 14 #include <tools_share/uuid.h> 15 16 #include <custom_svc.h> 17 #include "ipi_mailbox_svc.h" 18 #include "pm_svc_main.h" 19 20 /* SMC function IDs for SiP Service queries */ 21 #define VERSAL_SIP_SVC_UID 0x8200ff01U 22 #define VERSAL_SIP_SVC_VERSION 0x8200ff03U 23 24 /* SiP Service Calls version numbers */ 25 #define SIP_SVC_VERSION_MAJOR 0U 26 #define SIP_SVC_VERSION_MINOR 2U 27 28 /* These macros are used to identify PM calls from the SMC function ID */ 29 #define SIP_FID_MASK GENMASK(23, 16) 30 #define XLNX_FID_MASK GENMASK(23, 12) 31 #define PM_FID_VALUE 0U 32 #define IPI_FID_VALUE 0x1000U 33 #define is_pm_fid(_fid) (((_fid) & XLNX_FID_MASK) == PM_FID_VALUE) 34 #define is_ipi_fid(_fid) (((_fid) & XLNX_FID_MASK) == IPI_FID_VALUE) 35 36 /* SiP Service UUID */ 37 DEFINE_SVC_UUID2(versal_sip_uuid, 38 0x2ab9e4ecU, 0x93b9U, 0x11e7U, 0xa0U, 0x19U, 39 0xdfU, 0xe0U, 0xdbU, 0xadU, 0x0aU, 0xe0U); 40 41 /** 42 * sip_svc_setup() - Setup SiP Service 43 * 44 * Return: 0 on success,negative error code on failure. 45 * 46 * Invokes PM setup. 47 */ 48 static int32_t sip_svc_setup(void) 49 { 50 /* PM implementation as SiP Service */ 51 (void)pm_setup(); 52 53 return 0; 54 } 55 56 /** 57 * sip_svc_smc_handler() - Top-level SiP Service SMC handler. 58 * @smc_fid: Function Identifier. 59 * @x1: SMC64 Arguments 1 from kernel. 60 * @x2: SMC64 Arguments 2 from kernel. 61 * @x3: SMC64 Arguments 3 from kernel(upper 32-bits). 62 * @x4: SMC64 Arguments 4 from kernel. 63 * @cookie: Unused 64 * @handle: Pointer to caller's context structure. 65 * @flags: SECURE or NON_SECURE. 66 * 67 * Handler for all SiP SMC calls. Handles standard SIP requests 68 * and calls PM SMC handler if the call is for a PM-API function. 69 * 70 * Return: Unused. 71 */ 72 static uintptr_t sip_svc_smc_handler(uint32_t smc_fid, 73 u_register_t x1, 74 u_register_t x2, 75 u_register_t x3, 76 u_register_t x4, 77 void *cookie, 78 void *handle, 79 u_register_t flags) 80 { 81 VERBOSE("SMCID: 0x%08x, x1: 0x%016" PRIx64 ", x2: 0x%016" PRIx64 ", x3: 0x%016" PRIx64 ", x4: 0x%016" PRIx64 "\n", 82 smc_fid, x1, x2, x3, x4); 83 84 if ((smc_fid & SIP_FID_MASK) != 0U) { 85 WARN("SMC out of SiP assinged range: 0x%x\n", smc_fid); 86 SMC_RET1(handle, SMC_UNK); 87 } 88 89 /* Let PM SMC handler deal with PM-related requests */ 90 if (is_pm_fid(smc_fid)) { 91 return pm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 92 flags); 93 } 94 95 /* Let IPI SMC handler deal with IPI-related requests */ 96 if (is_ipi_fid(smc_fid)) { 97 return ipi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 98 flags); 99 } 100 101 /* Let PM SMC handler deal with PM-related requests */ 102 switch (smc_fid) { 103 case VERSAL_SIP_SVC_UID: 104 SMC_UUID_RET(handle, versal_sip_uuid); 105 106 case VERSAL_SIP_SVC_VERSION: 107 SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR); 108 109 case SOC_SIP_SVC_CUSTOM: 110 case SOC_SIP_SVC64_CUSTOM: 111 return custom_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 112 handle, flags); 113 114 default: 115 WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid); 116 SMC_RET1(handle, SMC_UNK); 117 } 118 } 119 120 /* Register PM Service Calls as runtime service */ 121 DECLARE_RT_SVC( 122 sip_svc, 123 OEN_SIP_START, 124 OEN_SIP_END, 125 (uint8_t)SMC_TYPE_FAST, 126 sip_svc_setup, 127 sip_svc_smc_handler); 128