1 /* 2 * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <arm_sip_svc.h> 8 #include <debug.h> 9 #include <pmf.h> 10 #include <runtime_svc.h> 11 #include <stdint.h> 12 #include <uuid.h> 13 14 15 /* ARM SiP Service UUID */ 16 DEFINE_SVC_UUID(arm_sip_svc_uid, 17 0xe2756d55, 0x3360, 0x4bb5, 0xbf, 0xf3, 18 0x62, 0x79, 0xfd, 0x11, 0x37, 0xff); 19 20 static int arm_sip_setup(void) 21 { 22 if (pmf_setup() != 0) 23 return 1; 24 return 0; 25 } 26 27 /* 28 * This function handles ARM defined SiP Calls 29 */ 30 static uintptr_t arm_sip_handler(unsigned int smc_fid, 31 u_register_t x1, 32 u_register_t x2, 33 u_register_t x3, 34 u_register_t x4, 35 void *cookie, 36 void *handle, 37 u_register_t flags) 38 { 39 /* 40 * Dispatch PMF calls to PMF SMC handler and return its return 41 * value 42 */ 43 if (is_pmf_fid(smc_fid)) { 44 return pmf_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 45 handle, flags); 46 } 47 48 switch (smc_fid) { 49 case ARM_SIP_SVC_CALL_COUNT: 50 /* 51 * Return the number of SiP Service Calls. PMF is the only 52 * SiP service implemented; so return number of PMF calls 53 */ 54 SMC_RET1(handle, PMF_NUM_SMC_CALLS); 55 56 case ARM_SIP_SVC_UID: 57 /* Return UID to the caller */ 58 SMC_UUID_RET(handle, arm_sip_svc_uid); 59 60 case ARM_SIP_SVC_VERSION: 61 /* Return the version of current implementation */ 62 SMC_RET2(handle, ARM_SIP_SVC_VERSION_MAJOR, ARM_SIP_SVC_VERSION_MINOR); 63 64 default: 65 WARN("Unimplemented ARM SiP Service Call: 0x%x \n", smc_fid); 66 SMC_RET1(handle, SMC_UNK); 67 } 68 69 } 70 71 72 /* Define a runtime service descriptor for fast SMC calls */ 73 DECLARE_RT_SVC( 74 arm_sip_svc, 75 OEN_SIP_START, 76 OEN_SIP_END, 77 SMC_TYPE_FAST, 78 arm_sip_setup, 79 arm_sip_handler 80 ); 81