1 /* 2 * Copyright (c) 2015, 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 #include <assert.h> 31 #include <debug.h> 32 #include <mtk_sip_svc.h> 33 #include <runtime_svc.h> 34 #include <uuid.h> 35 36 /* Mediatek SiP Service UUID */ 37 DEFINE_SVC_UUID(mtk_sip_svc_uid, 38 0xf7582ba4, 0x4262, 0x4d7d, 0x80, 0xe5, 39 0x8f, 0x95, 0x05, 0x00, 0x0f, 0x3d); 40 41 /* 42 * This function handles Mediatek defined SiP Calls */ 43 static uint64_t mediatek_sip_handler(uint32_t smc_fid, 44 uint64_t x1, 45 uint64_t x2, 46 uint64_t x3, 47 uint64_t x4, 48 void *cookie, 49 void *handle) 50 { 51 uint64_t ret; 52 53 switch (smc_fid) { 54 case MTK_SIP_SET_AUTHORIZED_SECURE_REG: 55 ret = mt_sip_set_authorized_sreg((uint32_t)x1, (uint32_t)x2); 56 SMC_RET1(handle, ret); 57 58 default: 59 ERROR("%s: unhandled SMC (0x%x)\n", __func__, smc_fid); 60 break; 61 } 62 63 SMC_RET1(handle, SMC_UNK); 64 } 65 66 /* 67 * This function is responsible for handling all SiP calls from the NS world 68 */ 69 uint64_t sip_smc_handler(uint32_t smc_fid, 70 uint64_t x1, 71 uint64_t x2, 72 uint64_t x3, 73 uint64_t x4, 74 void *cookie, 75 void *handle, 76 uint64_t flags) 77 { 78 uint32_t ns; 79 80 /* Determine which security state this SMC originated from */ 81 ns = is_caller_non_secure(flags); 82 if (!ns) 83 SMC_RET1(handle, SMC_UNK); 84 85 switch (smc_fid) { 86 case SIP_SVC_CALL_COUNT: 87 /* Return the number of Mediatek SiP Service Calls. */ 88 SMC_RET1(handle, MTK_SIP_NUM_CALLS); 89 90 case SIP_SVC_UID: 91 /* Return UID to the caller */ 92 SMC_UUID_RET(handle, mtk_sip_svc_uid); 93 94 case SIP_SVC_VERSION: 95 /* Return the version of current implementation */ 96 SMC_RET2(handle, MTK_SIP_SVC_VERSION_MAJOR, 97 MTK_SIP_SVC_VERSION_MINOR); 98 99 default: 100 return mediatek_sip_handler(smc_fid, x1, x2, x3, x4, 101 cookie, handle); 102 } 103 } 104 105 /* Define a runtime service descriptor for fast SMC calls */ 106 DECLARE_RT_SVC( 107 mediatek_sip_svc, 108 OEN_SIP_START, 109 OEN_SIP_END, 110 SMC_TYPE_FAST, 111 NULL, 112 sip_smc_handler 113 ); 114