1 /* 2 * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <arm_sip_svc.h> 32 #include <debug.h> 33 #include <pmf.h> 34 #include <runtime_svc.h> 35 #include <stdint.h> 36 #include <uuid.h> 37 38 39 /* ARM SiP Service UUID */ 40 DEFINE_SVC_UUID(arm_sip_svc_uid, 41 0xe2756d55, 0x3360, 0x4bb5, 0xbf, 0xf3, 42 0x62, 0x79, 0xfd, 0x11, 0x37, 0xff); 43 44 static int arm_sip_setup(void) 45 { 46 if (pmf_setup() != 0) 47 return 1; 48 return 0; 49 } 50 51 /* 52 * This function handles ARM defined SiP Calls 53 */ 54 static uintptr_t arm_sip_handler(unsigned int smc_fid, 55 u_register_t x1, 56 u_register_t x2, 57 u_register_t x3, 58 u_register_t x4, 59 void *cookie, 60 void *handle, 61 u_register_t flags) 62 { 63 /* 64 * Dispatch PMF calls to PMF SMC handler and return its return 65 * value 66 */ 67 if (is_pmf_fid(smc_fid)) { 68 return pmf_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 69 handle, flags); 70 } 71 72 switch (smc_fid) { 73 case ARM_SIP_SVC_CALL_COUNT: 74 /* 75 * Return the number of SiP Service Calls. PMF is the only 76 * SiP service implemented; so return number of PMF calls 77 */ 78 SMC_RET1(handle, PMF_NUM_SMC_CALLS); 79 80 case ARM_SIP_SVC_UID: 81 /* Return UID to the caller */ 82 SMC_UUID_RET(handle, arm_sip_svc_uid); 83 84 case ARM_SIP_SVC_VERSION: 85 /* Return the version of current implementation */ 86 SMC_RET2(handle, ARM_SIP_SVC_VERSION_MAJOR, ARM_SIP_SVC_VERSION_MINOR); 87 88 default: 89 WARN("Unimplemented ARM SiP Service Call: 0x%x \n", smc_fid); 90 SMC_RET1(handle, SMC_UNK); 91 } 92 93 } 94 95 96 /* Define a runtime service descriptor for fast SMC calls */ 97 DECLARE_RT_SVC( 98 arm_sip_svc, 99 OEN_SIP_START, 100 OEN_SIP_END, 101 SMC_TYPE_FAST, 102 arm_sip_setup, 103 arm_sip_handler 104 ); 105