| Siva Durga Prasad Paladugu | fe4af66 | 2018-09-25 18:44:58 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | /* Top level SMC handler for SiP calls. Dispatch PM calls to PM SMC handler. */ |
| 8 | |
| 9 | #include <debug.h> |
| 10 | #include <runtime_svc.h> |
| 11 | #include <uuid.h> |
| 12 | |
| 13 | /* SMC function IDs for SiP Service queries */ |
| 14 | #define VERSAL_SIP_SVC_CALL_COUNT 0x8200ff00 |
| 15 | #define VERSAL_SIP_SVC_UID 0x8200ff01 |
| 16 | #define VERSAL_SIP_SVC_VERSION 0x8200ff03 |
| 17 | |
| 18 | /* SiP Service Calls version numbers */ |
| 19 | #define SIP_SVC_VERSION_MAJOR 0 |
| 20 | #define SIP_SVC_VERSION_MINOR 1 |
| 21 | |
| 22 | /* These macros are used to identify PM calls from the SMC function ID */ |
| 23 | #define PM_FID_MASK 0xf000u |
| 24 | #define PM_FID_VALUE 0u |
| 25 | #define is_pm_fid(_fid) (((_fid) & PM_FID_MASK) == PM_FID_VALUE) |
| 26 | |
| 27 | /* SiP Service UUID */ |
| 28 | DEFINE_SVC_UUID2(versal_sip_uuid, |
| 29 | 0x2ab9e4ec, 0x93b9, 0x11e7, 0xa0, 0x19, |
| 30 | 0xdf, 0xe0, 0xdb, 0xad, 0x0a, 0xe0); |
| 31 | |
| 32 | /** |
| 33 | * sip_svc_setup() - Setup SiP Service |
| 34 | * |
| 35 | * Invokes PM setup |
| 36 | */ |
| 37 | static int32_t sip_svc_setup(void) |
| 38 | { |
| 39 | return 0; |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * sip_svc_smc_handler() - Top-level SiP Service SMC handler |
| 44 | * |
| 45 | * Handler for all SiP SMC calls. Handles standard SIP requests |
| 46 | * and calls PM SMC handler if the call is for a PM-API function. |
| 47 | */ |
| 48 | uintptr_t sip_svc_smc_handler(uint32_t smc_fid, |
| 49 | u_register_t x1, |
| 50 | u_register_t x2, |
| 51 | u_register_t x3, |
| 52 | u_register_t x4, |
| 53 | void *cookie, |
| 54 | void *handle, |
| 55 | u_register_t flags) |
| 56 | { |
| 57 | /* Let PM SMC handler deal with PM-related requests */ |
| 58 | switch (smc_fid) { |
| 59 | case VERSAL_SIP_SVC_CALL_COUNT: |
| 60 | /* PM functions + default functions */ |
| 61 | SMC_RET1(handle, 2); |
| 62 | |
| 63 | case VERSAL_SIP_SVC_UID: |
| 64 | SMC_UUID_RET(handle, versal_sip_uuid); |
| 65 | |
| 66 | case VERSAL_SIP_SVC_VERSION: |
| 67 | SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR); |
| 68 | |
| 69 | default: |
| 70 | WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid); |
| 71 | SMC_RET1(handle, SMC_UNK); |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | /* Register PM Service Calls as runtime service */ |
| 76 | DECLARE_RT_SVC( |
| 77 | sip_svc, |
| 78 | OEN_SIP_START, |
| 79 | OEN_SIP_END, |
| 80 | SMC_TYPE_FAST, |
| 81 | sip_svc_setup, |
| 82 | sip_svc_smc_handler); |