1 /* 2 * Copyright (c) 2018-2019, 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 #include "pm_svc_main.h" 13 14 /* SMC function IDs for SiP Service queries */ 15 #define VERSAL_SIP_SVC_CALL_COUNT 0x8200ff00 16 #define VERSAL_SIP_SVC_UID 0x8200ff01 17 #define VERSAL_SIP_SVC_VERSION 0x8200ff03 18 19 /* SiP Service Calls version numbers */ 20 #define SIP_SVC_VERSION_MAJOR 0 21 #define SIP_SVC_VERSION_MINOR 1 22 23 /* These macros are used to identify PM calls from the SMC function ID */ 24 #define PM_FID_MASK 0xf000u 25 #define PM_FID_VALUE 0u 26 #define is_pm_fid(_fid) (((_fid) & PM_FID_MASK) == PM_FID_VALUE) 27 28 /* SiP Service UUID */ 29 DEFINE_SVC_UUID2(versal_sip_uuid, 30 0x2ab9e4ec, 0x93b9, 0x11e7, 0xa0, 0x19, 31 0xdf, 0xe0, 0xdb, 0xad, 0x0a, 0xe0); 32 33 /** 34 * sip_svc_setup() - Setup SiP Service 35 * 36 * Invokes PM setup 37 */ 38 static int32_t sip_svc_setup(void) 39 { 40 /* PM implementation as SiP Service */ 41 pm_setup(); 42 43 return 0; 44 } 45 46 /** 47 * sip_svc_smc_handler() - Top-level SiP Service SMC handler 48 * 49 * Handler for all SiP SMC calls. Handles standard SIP requests 50 * and calls PM SMC handler if the call is for a PM-API function. 51 */ 52 uintptr_t sip_svc_smc_handler(uint32_t smc_fid, 53 u_register_t x1, 54 u_register_t x2, 55 u_register_t x3, 56 u_register_t x4, 57 void *cookie, 58 void *handle, 59 u_register_t flags) 60 { 61 /* Let PM SMC handler deal with PM-related requests */ 62 switch (smc_fid) { 63 case VERSAL_SIP_SVC_CALL_COUNT: 64 /* PM functions + default functions */ 65 SMC_RET1(handle, 2); 66 67 case VERSAL_SIP_SVC_UID: 68 SMC_UUID_RET(handle, versal_sip_uuid); 69 70 case VERSAL_SIP_SVC_VERSION: 71 SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR); 72 73 default: 74 WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid); 75 SMC_RET1(handle, SMC_UNK); 76 } 77 } 78 79 /* Register PM Service Calls as runtime service */ 80 DECLARE_RT_SVC( 81 sip_svc, 82 OEN_SIP_START, 83 OEN_SIP_END, 84 SMC_TYPE_FAST, 85 sip_svc_setup, 86 sip_svc_smc_handler); 87