| dp-arm | 1cebefd | 2016-09-19 11:21:03 +0100 | [diff] [blame] | 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 | ); |