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 "ipi_mailbox_svc.h" 15 #include "pm_svc_main.h" 16 17 /* SMC function IDs for SiP Service queries */ 18 #define ZYNQMP_SIP_SVC_CALL_COUNT U(0x8200ff00) 19 #define ZYNQMP_SIP_SVC_UID U(0x8200ff01) 20 #define ZYNQMP_SIP_SVC_VERSION U(0x8200ff03) 21 22 /* SiP Service Calls version numbers */ 23 #define SIP_SVC_VERSION_MAJOR 0 24 #define SIP_SVC_VERSION_MINOR 1 25 26 /* These macros are used to identify PM, IPI calls from the SMC function ID */ 27 #define SIP_FID_MASK GENMASK(23, 16) 28 #define XLNX_FID_MASK GENMASK(23, 12) 29 #define PM_FID_VALUE 0u 30 #define IPI_FID_VALUE 0x1000u 31 #define EM_FID_VALUE 0xE0000u 32 #define is_em_fid(_fid) (((_fid) & XLNX_FID_MASK) == EM_FID_VALUE) 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(zynqmp_sip_uuid, 38 0x5c9b1b2a, 0x0586, 0x2340, 0xa6, 0x1b, 39 0xb9, 0x25, 0x82, 0x2d, 0xe3, 0xa5); 40 41 /** 42 * sip_svc_setup() - Setup SiP Service 43 * 44 * Invokes PM setup 45 */ 46 static int32_t sip_svc_setup(void) 47 { 48 /* PM implementation as SiP Service */ 49 return pm_setup(); 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 /* Let EM SMC handler deal with EM-related requests */ 71 if (is_em_fid(smc_fid)) { 72 return em_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 73 flags); 74 } 75 76 if (smc_fid & SIP_FID_MASK) { 77 WARN("SMC out of SiP assinged range: 0x%x\n", smc_fid); 78 SMC_RET1(handle, SMC_UNK); 79 } 80 81 /* Let PM SMC handler deal with PM-related requests */ 82 if (is_pm_fid(smc_fid)) { 83 return pm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 84 flags); 85 } 86 87 /* Let IPI SMC handler deal with IPI-related requests */ 88 if (is_ipi_fid(smc_fid)) { 89 return ipi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 90 flags); 91 } 92 93 switch (smc_fid) { 94 case ZYNQMP_SIP_SVC_CALL_COUNT: 95 /* PM functions + default functions */ 96 SMC_RET1(handle, PM_API_MAX + 2); 97 98 case ZYNQMP_SIP_SVC_UID: 99 SMC_UUID_RET(handle, zynqmp_sip_uuid); 100 101 case ZYNQMP_SIP_SVC_VERSION: 102 SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR); 103 104 default: 105 WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid); 106 SMC_RET1(handle, SMC_UNK); 107 } 108 } 109 110 /* Register PM Service Calls as runtime service */ 111 DECLARE_RT_SVC( 112 sip_svc, 113 OEN_SIP_START, 114 OEN_SIP_END, 115 (uint8_t)SMC_TYPE_FAST, 116 sip_svc_setup, 117 sip_svc_smc_handler); 118