1 /* 2 * Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved. 3 * Copyright (c) 2018-2022, Xilinx, Inc. All rights reserved. 4 * Copyright (C) 2022, Advanced Micro Devices, Inc. All rights reserved. 5 * 6 * SPDX-License-Identifier: BSD-3-Clause 7 */ 8 9 /* Top level SMC handler for SiP calls. Dispatch PM calls to PM SMC handler. */ 10 11 #include <errno.h> 12 13 #include <common/debug.h> 14 #include <common/runtime_svc.h> 15 #include <tools_share/uuid.h> 16 17 #include "ipi_mailbox_svc.h" 18 #include "plat_private.h" 19 #include "pm_svc_main.h" 20 21 /* SMC function IDs for SiP Service queries */ 22 #define VERSAL_NET_SIP_SVC_CALL_COUNT (0x8200ff00U) 23 #define VERSAL_NET_SIP_SVC_UID (0x8200ff01U) 24 #define VERSAL_NET_SIP_SVC_VERSION (0x8200ff03U) 25 26 /* SiP Service Calls version numbers */ 27 #define SIP_SVC_VERSION_MAJOR (0U) 28 #define SIP_SVC_VERSION_MINOR (1U) 29 30 /* These macros are used to identify PM calls from the SMC function ID */ 31 #define PM_FID_MASK 0xf000u 32 #define PM_FID_VALUE 0u 33 #define IPI_FID_VALUE 0x1000u 34 #define is_pm_fid(_fid) (((_fid) & PM_FID_MASK) == PM_FID_VALUE) 35 #define is_ipi_fid(_fid) (((_fid) & PM_FID_MASK) == IPI_FID_VALUE) 36 37 /* SiP Service UUID */ 38 DEFINE_SVC_UUID2(versal_net_sip_uuid, 39 0x80d4c25a, 0xebaf, 0x11eb, 0x94, 0x68, 40 0x0b, 0x4e, 0x3b, 0x8f, 0xc3, 0x60); 41 42 /** 43 * sip_svc_setup() - Setup SiP Service 44 */ 45 static int32_t sip_svc_setup(void) 46 { 47 return sip_svc_setup_init(); 48 } 49 50 /* 51 * sip_svc_smc_handler() - Top-level SiP Service SMC handler 52 * 53 * Handler for all SiP SMC calls. Handles standard SIP requests 54 * and calls PM SMC handler if the call is for a PM-API function. 55 */ 56 static uintptr_t sip_svc_smc_handler(uint32_t smc_fid, 57 u_register_t x1, 58 u_register_t x2, 59 u_register_t x3, 60 u_register_t x4, 61 void *cookie, 62 void *handle, 63 u_register_t flags) 64 { 65 /* Let PM SMC handler deal with PM-related requests */ 66 if (is_pm_fid(smc_fid)) { 67 return smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 68 flags); 69 } 70 71 /* Let IPI SMC handler deal with IPI-related requests if platform */ 72 if (is_ipi_fid(smc_fid)) { 73 return ipi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, flags); 74 } 75 76 /* Let PM SMC handler deal with PM-related requests */ 77 switch (smc_fid) { 78 case VERSAL_NET_SIP_SVC_CALL_COUNT: 79 /* PM functions + default functions */ 80 SMC_RET1(handle, 2); 81 82 case VERSAL_NET_SIP_SVC_UID: 83 SMC_UUID_RET(handle, versal_net_sip_uuid); 84 85 case VERSAL_NET_SIP_SVC_VERSION: 86 SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR); 87 88 default: 89 WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid); 90 SMC_RET1(handle, SMC_UNK); 91 } 92 } 93 94 /* Register PM Service Calls as runtime service */ 95 DECLARE_RT_SVC( 96 sip_svc, 97 OEN_SIP_START, 98 OEN_SIP_END, 99 SMC_TYPE_FAST, 100 sip_svc_setup, 101 sip_svc_smc_handler); 102