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 <common/runtime_svc.h> 10 #include <tools_share/uuid.h> 11 12 #include <custom_svc.h> 13 #include "ipi_mailbox_svc.h" 14 #include "pm_svc_main.h" 15 16 /* SMC function IDs for SiP Service queries */ 17 #define ZYNQMP_SIP_SVC_CALL_COUNT U(0x8200ff00) 18 #define ZYNQMP_SIP_SVC_UID U(0x8200ff01) 19 #define ZYNQMP_SIP_SVC_VERSION U(0x8200ff03) 20 21 /* SiP Service Calls version numbers */ 22 #define SIP_SVC_VERSION_MAJOR 0 23 #define SIP_SVC_VERSION_MINOR 1 24 25 /* These macros are used to identify PM, IPI calls from the SMC function ID */ 26 #define PM_FID_MASK 0xf000u 27 #define PM_FID_VALUE 0u 28 #define IPI_FID_VALUE 0x1000u 29 #define EM_FID_MASK 0xf0000u 30 #define EM_FID_VALUE 0xE0000u 31 #define is_em_fid(_fid) (((_fid) & EM_FID_MASK) == EM_FID_VALUE) 32 #define is_pm_fid(_fid) (((_fid) & PM_FID_MASK) == PM_FID_VALUE) 33 #define is_ipi_fid(_fid) (((_fid) & PM_FID_MASK) == IPI_FID_VALUE) 34 35 /* SiP Service UUID */ 36 DEFINE_SVC_UUID2(zynqmp_sip_uuid, 37 0x5c9b1b2a, 0x0586, 0x2340, 0xa6, 0x1b, 38 0xb9, 0x25, 0x82, 0x2d, 0xe3, 0xa5); 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 return pm_setup(); 49 } 50 51 /** 52 * sip_svc_smc_handler() - Top-level SiP Service SMC handler 53 * 54 * Handler for all SiP SMC calls. Handles standard SIP requests 55 * and calls PM SMC handler if the call is for a PM-API function. 56 */ 57 static uintptr_t sip_svc_smc_handler(uint32_t smc_fid, 58 u_register_t x1, 59 u_register_t x2, 60 u_register_t x3, 61 u_register_t x4, 62 void *cookie, 63 void *handle, 64 u_register_t flags) 65 { 66 /* Let EM SMC handler deal with EM-related requests */ 67 if (is_em_fid(smc_fid)) { 68 return em_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 69 flags); 70 } else if (is_pm_fid(smc_fid)) { 71 /* Let PM SMC handler deal with PM-related requests */ 72 return pm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 73 flags); 74 } 75 76 /* Let IPI SMC handler deal with IPI-related requests */ 77 if (is_ipi_fid(smc_fid)) { 78 return ipi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 79 flags); 80 } 81 82 switch (smc_fid) { 83 case ZYNQMP_SIP_SVC_CALL_COUNT: 84 /* PM functions + default functions */ 85 SMC_RET1(handle, PM_API_MAX + 2); 86 87 case ZYNQMP_SIP_SVC_UID: 88 SMC_UUID_RET(handle, zynqmp_sip_uuid); 89 90 case ZYNQMP_SIP_SVC_VERSION: 91 SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR); 92 93 case ZYNQMP_SIP_SVC_CUSTOM: 94 case ZYNQMP_SIP_SVC64_CUSTOM: 95 return custom_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 96 handle, flags); 97 98 default: 99 WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid); 100 SMC_RET1(handle, SMC_UNK); 101 } 102 } 103 104 /* Register PM Service Calls as runtime service */ 105 DECLARE_RT_SVC( 106 sip_svc, 107 OEN_SIP_START, 108 OEN_SIP_END, 109 (uint8_t)SMC_TYPE_FAST, 110 sip_svc_setup, 111 sip_svc_smc_handler); 112