1 /* 2 * Copyright (c) 2018, 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/debug.h> 10 #include <common/runtime_svc.h> 11 #include <tools_share/uuid.h> 12 13 /* SMC function IDs for SiP Service queries */ 14 #define VERSAL_SIP_SVC_CALL_COUNT 0x8200ff00 15 #define VERSAL_SIP_SVC_UID 0x8200ff01 16 #define VERSAL_SIP_SVC_VERSION 0x8200ff03 17 18 /* SiP Service Calls version numbers */ 19 #define SIP_SVC_VERSION_MAJOR 0 20 #define SIP_SVC_VERSION_MINOR 1 21 22 /* These macros are used to identify PM calls from the SMC function ID */ 23 #define PM_FID_MASK 0xf000u 24 #define PM_FID_VALUE 0u 25 #define is_pm_fid(_fid) (((_fid) & PM_FID_MASK) == PM_FID_VALUE) 26 27 /* SiP Service UUID */ 28 DEFINE_SVC_UUID2(versal_sip_uuid, 29 0x2ab9e4ec, 0x93b9, 0x11e7, 0xa0, 0x19, 30 0xdf, 0xe0, 0xdb, 0xad, 0x0a, 0xe0); 31 32 /** 33 * sip_svc_setup() - Setup SiP Service 34 * 35 * Invokes PM setup 36 */ 37 static int32_t sip_svc_setup(void) 38 { 39 return 0; 40 } 41 42 /** 43 * sip_svc_smc_handler() - Top-level SiP Service SMC handler 44 * 45 * Handler for all SiP SMC calls. Handles standard SIP requests 46 * and calls PM SMC handler if the call is for a PM-API function. 47 */ 48 uintptr_t sip_svc_smc_handler(uint32_t smc_fid, 49 u_register_t x1, 50 u_register_t x2, 51 u_register_t x3, 52 u_register_t x4, 53 void *cookie, 54 void *handle, 55 u_register_t flags) 56 { 57 /* Let PM SMC handler deal with PM-related requests */ 58 switch (smc_fid) { 59 case VERSAL_SIP_SVC_CALL_COUNT: 60 /* PM functions + default functions */ 61 SMC_RET1(handle, 2); 62 63 case VERSAL_SIP_SVC_UID: 64 SMC_UUID_RET(handle, versal_sip_uuid); 65 66 case VERSAL_SIP_SVC_VERSION: 67 SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR); 68 69 default: 70 WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid); 71 SMC_RET1(handle, SMC_UNK); 72 } 73 } 74 75 /* Register PM Service Calls as runtime service */ 76 DECLARE_RT_SVC( 77 sip_svc, 78 OEN_SIP_START, 79 OEN_SIP_END, 80 SMC_TYPE_FAST, 81 sip_svc_setup, 82 sip_svc_smc_handler); 83