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 "ipi_mailbox_svc.h" 13 #include "pm_svc_main.h" 14 15 /* SMC function IDs for SiP Service queries */ 16 #define ZYNQMP_SIP_SVC_CALL_COUNT U(0x8200ff00) 17 #define ZYNQMP_SIP_SVC_UID U(0x8200ff01) 18 #define ZYNQMP_SIP_SVC_VERSION U(0x8200ff03) 19 20 /* SiP Service Calls version numbers */ 21 #define SIP_SVC_VERSION_MAJOR 0 22 #define SIP_SVC_VERSION_MINOR 1 23 24 /* These macros are used to identify PM, IPI calls from the SMC function ID */ 25 #define PM_FID_MASK 0xf000u 26 #define PM_FID_VALUE 0u 27 #define IPI_FID_VALUE 0x1000u 28 #define EM_FID_MASK 0xf0000u 29 #define EM_FID_VALUE 0xE0000u 30 #define is_em_fid(_fid) (((_fid) & EM_FID_MASK) == EM_FID_VALUE) 31 #define is_pm_fid(_fid) (((_fid) & PM_FID_MASK) == PM_FID_VALUE) 32 #define is_ipi_fid(_fid) (((_fid) & PM_FID_MASK) == IPI_FID_VALUE) 33 34 /* SiP Service UUID */ 35 DEFINE_SVC_UUID2(zynqmp_sip_uuid, 36 0x5c9b1b2a, 0x0586, 0x2340, 0xa6, 0x1b, 37 0xb9, 0x25, 0x82, 0x2d, 0xe3, 0xa5); 38 39 /** 40 * sip_svc_setup() - Setup SiP Service 41 * 42 * Invokes PM setup 43 */ 44 static int32_t sip_svc_setup(void) 45 { 46 /* PM implementation as SiP Service */ 47 return pm_setup(); 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 EM SMC handler deal with EM-related requests */ 66 if (is_em_fid(smc_fid)) { 67 return em_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 68 flags); 69 } 70 71 /* Let PM SMC handler deal with PM-related requests */ 72 if (is_pm_fid(smc_fid)) { 73 return pm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 74 flags); 75 } 76 77 /* Let IPI SMC handler deal with IPI-related requests */ 78 if (is_ipi_fid(smc_fid)) { 79 return ipi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 80 flags); 81 } 82 83 switch (smc_fid) { 84 case ZYNQMP_SIP_SVC_CALL_COUNT: 85 /* PM functions + default functions */ 86 SMC_RET1(handle, PM_API_MAX + 2); 87 88 case ZYNQMP_SIP_SVC_UID: 89 SMC_UUID_RET(handle, zynqmp_sip_uuid); 90 91 case ZYNQMP_SIP_SVC_VERSION: 92 SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR); 93 94 default: 95 WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid); 96 SMC_RET1(handle, SMC_UNK); 97 } 98 } 99 100 /* Register PM Service Calls as runtime service */ 101 DECLARE_RT_SVC( 102 sip_svc, 103 OEN_SIP_START, 104 OEN_SIP_END, 105 (uint8_t)SMC_TYPE_FAST, 106 sip_svc_setup, 107 sip_svc_smc_handler); 108