1 /* 2 * Copyright (c) 2013-2020, Arm Limited and Contributors. All rights reserved. 3 * Copyright (c) 2023, 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/runtime_svc.h> 13 #include <tools_share/uuid.h> 14 15 #include <custom_svc.h> 16 #include "ipi_mailbox_svc.h" 17 #include "pm_defs.h" 18 #include "zynqmp_pm_svc_main.h" 19 20 /* SMC function IDs for SiP Service queries */ 21 #define ZYNQMP_SIP_SVC_CALL_COUNT U(0x8200ff00) 22 #define ZYNQMP_SIP_SVC_UID U(0x8200ff01) 23 #define ZYNQMP_SIP_SVC_VERSION U(0x8200ff03) 24 25 /* SiP Service Calls version numbers */ 26 #define SIP_SVC_VERSION_MAJOR 0 27 #define SIP_SVC_VERSION_MINOR 1 28 29 /* These macros are used to identify PM, IPI calls from the SMC function ID */ 30 #define SIP_FID_MASK GENMASK(23, 16) 31 #define XLNX_FID_MASK GENMASK(23, 12) 32 #define PM_FID_VALUE 0u 33 #define IPI_FID_VALUE 0x1000u 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 * Return: On success, the initialization function must return 0. 46 * Any other return value will cause the framework to ignore 47 * the service. 48 * 49 * Invokes PM setup. 50 */ 51 static int32_t sip_svc_setup(void) 52 { 53 /* PM implementation as SiP Service */ 54 return pm_setup(); 55 } 56 57 /** 58 * sip_svc_smc_handler() - Top-level SiP Service SMC handler 59 * @smc_fid: Function Identifier. 60 * @x1: SMC64 Arguments 1 from kernel. 61 * @x2: SMC64 Arguments 2 from kernel. 62 * @x3: SMC64 Arguments 3 from kernel(upper 32-bits). 63 * @x4: SMC64 Arguments 4 from kernel. 64 * @cookie: Unused 65 * @handle: Pointer to caller's context structure. 66 * @flags: SECURE_FLAG or NON_SECURE_FLAG. 67 * 68 * Handler for all SiP SMC calls. Handles standard SIP requests 69 * and calls PM SMC handler if the call is for a PM-API function. 70 * 71 * Return: Unused. 72 */ 73 static uintptr_t sip_svc_smc_handler(uint32_t smc_fid, 74 u_register_t x1, 75 u_register_t x2, 76 u_register_t x3, 77 u_register_t x4, 78 void *cookie, 79 void *handle, 80 u_register_t flags) 81 { 82 VERBOSE("SMCID: 0x%08x, x1: 0x%016" PRIx64 ", x2: 0x%016" PRIx64 ", x3: 0x%016" PRIx64 ", x4: 0x%016" PRIx64 "\n", 83 smc_fid, x1, x2, x3, x4); 84 85 if (smc_fid & SIP_FID_MASK) { 86 WARN("SMC out of SiP assinged range: 0x%x\n", smc_fid); 87 SMC_RET1(handle, SMC_UNK); 88 } 89 90 /* Let PM SMC handler deal with PM-related requests */ 91 if (is_pm_fid(smc_fid)) { 92 return pm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 93 flags); 94 } 95 96 /* Let IPI SMC handler deal with IPI-related requests */ 97 if (is_ipi_fid(smc_fid)) { 98 return ipi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 99 flags); 100 } 101 102 switch (smc_fid) { 103 case ZYNQMP_SIP_SVC_CALL_COUNT: 104 /* PM functions + default functions */ 105 SMC_RET1(handle, PM_API_MAX + 2); 106 107 case ZYNQMP_SIP_SVC_UID: 108 SMC_UUID_RET(handle, zynqmp_sip_uuid); 109 110 case ZYNQMP_SIP_SVC_VERSION: 111 SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR); 112 113 case ZYNQMP_SIP_SVC_CUSTOM: 114 case ZYNQMP_SIP_SVC64_CUSTOM: 115 return custom_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 116 handle, flags); 117 118 default: 119 WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid); 120 SMC_RET1(handle, SMC_UNK); 121 } 122 } 123 124 /* Register PM Service Calls as runtime service */ 125 DECLARE_RT_SVC( 126 sip_svc, 127 OEN_SIP_START, 128 OEN_SIP_END, 129 (uint8_t)SMC_TYPE_FAST, 130 sip_svc_setup, 131 sip_svc_smc_handler); 132