1 /* 2 * Copyright (c) 2014, 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 <stdint.h> 32 #include <uuid.h> 33 #include <context_mgmt.h> 34 #include <runtime_svc.h> 35 #include <std_svc.h> 36 #include <psci.h> 37 #include <debug.h> 38 39 /* Standard Service UUID */ 40 DEFINE_SVC_UUID(arm_svc_uid, 41 0x108d905b, 0xf863, 0x47e8, 0xae, 0x2d, 42 0xc0, 0xfb, 0x56, 0x41, 0xf6, 0xe2); 43 44 /* Setup Standard Services */ 45 static int32_t std_svc_setup(void) 46 { 47 /* 48 * PSCI is the only specification implemented as a Standard Service. 49 * Invoke PSCI setup from here 50 */ 51 return psci_setup(); 52 } 53 54 /* 55 * Top-level Standard Service SMC handler. This handler will in turn dispatch 56 * calls to PSCI SMC handler 57 */ 58 uint64_t std_svc_smc_handler(uint32_t smc_fid, 59 uint64_t x1, 60 uint64_t x2, 61 uint64_t x3, 62 uint64_t x4, 63 void *cookie, 64 void *handle, 65 uint64_t flags) 66 { 67 /* 68 * Dispatch PSCI calls to PSCI SMC handler and return its return 69 * value 70 */ 71 if (is_psci_fid(smc_fid)) { 72 return psci_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 73 handle, flags); 74 } 75 76 switch (smc_fid) { 77 case ARM_STD_SVC_CALL_COUNT: 78 /* 79 * Return the number of Standard Service Calls. PSCI is the only 80 * standard service implemented; so return number of PSCI calls 81 */ 82 SMC_RET1(handle, PSCI_NUM_CALLS); 83 84 case ARM_STD_SVC_UID: 85 /* Return UID to the caller */ 86 SMC_UUID_RET(handle, arm_svc_uid); 87 88 case ARM_STD_SVC_VERSION: 89 /* Return the version of current implementation */ 90 SMC_RET2(handle, STD_SVC_VERSION_MAJOR, STD_SVC_VERSION_MINOR); 91 92 default: 93 WARN("Unimplemented Standard Service Call: 0x%x \n", smc_fid); 94 SMC_RET1(handle, SMC_UNK); 95 } 96 } 97 98 /* Register Standard Service Calls as runtime service */ 99 DECLARE_RT_SVC( 100 std_svc, 101 102 OEN_STD_START, 103 OEN_STD_END, 104 SMC_TYPE_FAST, 105 std_svc_setup, 106 std_svc_smc_handler 107 ); 108