1 /* 2 * Copyright (c) 2013-2020, 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/runtime_svc.h> 12 #include <tools_share/uuid.h> 13 14 #include <custom_svc.h> 15 #include "ipi_mailbox_svc.h" 16 #include "pm_svc_main.h" 17 18 /* SMC function IDs for SiP Service queries */ 19 #define ZYNQMP_SIP_SVC_CALL_COUNT U(0x8200ff00) 20 #define ZYNQMP_SIP_SVC_UID U(0x8200ff01) 21 #define ZYNQMP_SIP_SVC_VERSION U(0x8200ff03) 22 23 /* SiP Service Calls version numbers */ 24 #define SIP_SVC_VERSION_MAJOR 0 25 #define SIP_SVC_VERSION_MINOR 1 26 27 /* These macros are used to identify PM, IPI 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 EM_FID_VALUE 0xE0000u 33 #define is_em_fid(_fid) (((_fid) & XLNX_FID_MASK) == EM_FID_VALUE) 34 #define is_pm_fid(_fid) (((_fid) & XLNX_FID_MASK) == PM_FID_VALUE) 35 #define is_ipi_fid(_fid) (((_fid) & XLNX_FID_MASK) == IPI_FID_VALUE) 36 37 /* SiP Service UUID */ 38 DEFINE_SVC_UUID2(zynqmp_sip_uuid, 39 0x5c9b1b2a, 0x0586, 0x2340, 0xa6, 0x1b, 40 0xb9, 0x25, 0x82, 0x2d, 0xe3, 0xa5); 41 42 /** 43 * sip_svc_setup() - Setup SiP Service 44 * 45 * Invokes PM setup 46 */ 47 static int32_t sip_svc_setup(void) 48 { 49 /* PM implementation as SiP Service */ 50 return pm_setup(); 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 static 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 /* Let EM SMC handler deal with EM-related requests */ 72 if (is_em_fid(smc_fid)) { 73 return em_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 74 flags); 75 } 76 77 if (smc_fid & SIP_FID_MASK) { 78 WARN("SMC out of SiP assinged range: 0x%x\n", smc_fid); 79 SMC_RET1(handle, SMC_UNK); 80 } 81 82 /* Let PM SMC handler deal with PM-related requests */ 83 if (is_pm_fid(smc_fid)) { 84 return pm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 85 flags); 86 } 87 88 /* Let IPI SMC handler deal with IPI-related requests */ 89 if (is_ipi_fid(smc_fid)) { 90 return ipi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 91 flags); 92 } 93 94 switch (smc_fid) { 95 case ZYNQMP_SIP_SVC_CALL_COUNT: 96 /* PM functions + default functions */ 97 SMC_RET1(handle, PM_API_MAX + 2); 98 99 case ZYNQMP_SIP_SVC_UID: 100 SMC_UUID_RET(handle, zynqmp_sip_uuid); 101 102 case ZYNQMP_SIP_SVC_VERSION: 103 SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR); 104 105 case ZYNQMP_SIP_SVC_CUSTOM: 106 case ZYNQMP_SIP_SVC64_CUSTOM: 107 return custom_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 108 handle, flags); 109 110 default: 111 WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid); 112 SMC_RET1(handle, SMC_UNK); 113 } 114 } 115 116 /* Register PM Service Calls as runtime service */ 117 DECLARE_RT_SVC( 118 sip_svc, 119 OEN_SIP_START, 120 OEN_SIP_END, 121 (uint8_t)SMC_TYPE_FAST, 122 sip_svc_setup, 123 sip_svc_smc_handler); 124