1 /* 2 * Copyright (c) 2018-2021, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 /* Top level SMC handler for SiP calls. Dispatch PM calls to PM SMC handler. */ 8 9 #include <inttypes.h> 10 11 #include <common/debug.h> 12 #include <common/runtime_svc.h> 13 #include <tools_share/uuid.h> 14 15 #include "ipi_mailbox_svc.h" 16 #include "pm_svc_main.h" 17 18 /* SMC function IDs for SiP Service queries */ 19 #define VERSAL_SIP_SVC_CALL_COUNT U(0x8200ff00) 20 #define VERSAL_SIP_SVC_UID U(0x8200ff01) 21 #define VERSAL_SIP_SVC_VERSION U(0x8200ff03) 22 23 /* SiP Service Calls version numbers */ 24 #define SIP_SVC_VERSION_MAJOR U(0) 25 #define SIP_SVC_VERSION_MINOR U(1) 26 27 /* These macros are used to identify PM calls from the SMC function ID */ 28 #define SIP_FID_MASK GENMASK(23, 16) 29 #define XLNX_FID_MASK GENMASK(23, 12) 30 #define PM_FID_VALUE 0u 31 #define IPI_FID_VALUE 0x1000u 32 #define is_pm_fid(_fid) (((_fid) & XLNX_FID_MASK) == PM_FID_VALUE) 33 #define is_ipi_fid(_fid) (((_fid) & XLNX_FID_MASK) == IPI_FID_VALUE) 34 35 /* SiP Service UUID */ 36 DEFINE_SVC_UUID2(versal_sip_uuid, 37 0x2ab9e4ecU, 0x93b9U, 0x11e7U, 0xa0U, 0x19U, 38 0xdfU, 0xe0U, 0xdbU, 0xadU, 0x0aU, 0xe0U); 39 40 /** 41 * sip_svc_setup() - Setup SiP Service 42 * 43 * Invokes PM setup 44 */ 45 static int32_t sip_svc_setup(void) 46 { 47 /* PM implementation as SiP Service */ 48 (void)pm_setup(); 49 50 return 0; 51 } 52 53 /** 54 * sip_svc_smc_handler() - Top-level SiP Service SMC handler 55 * 56 * Handler for all SiP SMC calls. Handles standard SIP requests 57 * and calls PM SMC handler if the call is for a PM-API function. 58 */ 59 uintptr_t sip_svc_smc_handler(uint32_t smc_fid, 60 u_register_t x1, 61 u_register_t x2, 62 u_register_t x3, 63 u_register_t x4, 64 void *cookie, 65 void *handle, 66 u_register_t flags) 67 { 68 VERBOSE("SMCID: 0x%08x, x1: 0x%016" PRIx64 ", x2: 0x%016" PRIx64 ", x3: 0x%016" PRIx64 ", x4: 0x%016" PRIx64 "\n", 69 smc_fid, x1, x2, x3, x4); 70 71 if (smc_fid & SIP_FID_MASK) { 72 WARN("SMC out of SiP assinged range: 0x%x\n", smc_fid); 73 SMC_RET1(handle, SMC_UNK); 74 } 75 76 /* Let PM SMC handler deal with PM-related requests */ 77 if (is_pm_fid(smc_fid)) { 78 return pm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 79 flags); 80 } 81 82 /* Let IPI SMC handler deal with IPI-related requests */ 83 if (is_ipi_fid(smc_fid)) { 84 return ipi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 85 flags); 86 } 87 88 /* Let PM SMC handler deal with PM-related requests */ 89 switch (smc_fid) { 90 case VERSAL_SIP_SVC_CALL_COUNT: 91 /* PM functions + default functions */ 92 SMC_RET1(handle, 2); 93 94 case VERSAL_SIP_SVC_UID: 95 SMC_UUID_RET(handle, versal_sip_uuid); 96 97 case VERSAL_SIP_SVC_VERSION: 98 SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR); 99 100 default: 101 WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid); 102 SMC_RET1(handle, SMC_UNK); 103 } 104 } 105 106 /* Register PM Service Calls as runtime service */ 107 DECLARE_RT_SVC( 108 sip_svc, 109 OEN_SIP_START, 110 OEN_SIP_END, 111 SMC_TYPE_FAST, 112 sip_svc_setup, 113 sip_svc_smc_handler); 114