| developer | 02e6591 | 2023-08-17 16:33:10 +0800 | [diff] [blame^] | 1 | /* eip97_global_prng.c |
| 2 | * |
| 3 | * EIP-97 GLobal Control Driver Library |
| 4 | * PRNG Module |
| 5 | */ |
| 6 | |
| 7 | /* -------------------------------------------------------------------------- */ |
| 8 | /* */ |
| 9 | /* Module : ddk197 */ |
| 10 | /* Version : 5.6.1 */ |
| 11 | /* Configuration : DDK-197-GPL */ |
| 12 | /* */ |
| 13 | /* Date : 2022-Dec-16 */ |
| 14 | /* */ |
| 15 | /* Copyright (c) 2008-2022 by Rambus, Inc. and/or its subsidiaries. */ |
| 16 | /* */ |
| 17 | /* This program is free software: you can redistribute it and/or modify */ |
| 18 | /* it under the terms of the GNU General Public License as published by */ |
| 19 | /* the Free Software Foundation, either version 2 of the License, or */ |
| 20 | /* any later version. */ |
| 21 | /* */ |
| 22 | /* This program is distributed in the hope that it will be useful, */ |
| 23 | /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ |
| 24 | /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ |
| 25 | /* GNU General Public License for more details. */ |
| 26 | /* */ |
| 27 | /* You should have received a copy of the GNU General Public License */ |
| 28 | /* along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 29 | /* -------------------------------------------------------------------------- */ |
| 30 | |
| 31 | /*---------------------------------------------------------------------------- |
| 32 | * This module implements (provides) the following interface(s): |
| 33 | */ |
| 34 | |
| 35 | #include "eip97_global_prng.h" |
| 36 | |
| 37 | |
| 38 | /*---------------------------------------------------------------------------- |
| 39 | * This module uses (requires) the following interface(s): |
| 40 | */ |
| 41 | |
| 42 | // Driver Framework Device API |
| 43 | #include "device_types.h" // Device_Handle_t |
| 44 | |
| 45 | // EIP-97 Global Control Driver Library Internal interfaces |
| 46 | #include "eip97_global_internal.h" |
| 47 | #include "eip96_level0.h" // EIP-96 Level 0 macros |
| 48 | #include "eip97_global_fsm.h" // State machine |
| 49 | |
| 50 | |
| 51 | /*---------------------------------------------------------------------------- |
| 52 | * Definitions and macros |
| 53 | */ |
| 54 | |
| 55 | |
| 56 | /*---------------------------------------------------------------------------- |
| 57 | * Local variables |
| 58 | */ |
| 59 | |
| 60 | |
| 61 | /*---------------------------------------------------------------------------- |
| 62 | * EIP97_Global_PRNG_Reseed |
| 63 | */ |
| 64 | EIP97_Global_Error_t |
| 65 | EIP97_Global_PRNG_Reseed( |
| 66 | EIP97_Global_IOArea_t * const IOArea_p, |
| 67 | const unsigned int PE_Number, |
| 68 | const EIP96_PRNG_Reseed_t * const ReseedData_p) |
| 69 | { |
| 70 | Device_Handle_t Device; |
| 71 | volatile EIP97_True_IOArea_t * const TrueIOArea_p = IOAREA(IOArea_p); |
| 72 | |
| 73 | EIP97_GLOBAL_CHECK_POINTER(IOArea_p); |
| 74 | |
| 75 | if(PE_Number >= EIP97_GLOBAL_MAX_NOF_PE_TO_USE) |
| 76 | return EIP97_GLOBAL_ARGUMENT_ERROR; |
| 77 | |
| 78 | Device = TrueIOArea_p->Device; |
| 79 | |
| 80 | #ifdef EIP97_GLOBAL_DEBUG_FSM |
| 81 | { |
| 82 | EIP97_Global_Error_t rv; |
| 83 | |
| 84 | // Remain in the current state |
| 85 | rv = EIP97_Global_State_Set((volatile EIP97_Global_State_t*)&TrueIOArea_p->State, |
| 86 | (EIP97_Global_State_t)TrueIOArea_p->State); |
| 87 | if(rv != EIP97_GLOBAL_NO_ERROR) |
| 88 | return EIP97_GLOBAL_ILLEGAL_IN_STATE; |
| 89 | } |
| 90 | #endif // EIP97_GLOBAL_DEBUG_FSM |
| 91 | |
| 92 | EIP96_PRNG_CTRL_WR(Device, |
| 93 | PE_Number, // EIP-96 PE number |
| 94 | false, // Disable PRNG |
| 95 | false); // Set PRNG Manual mode |
| 96 | |
| 97 | // Write new seed data |
| 98 | EIP96_PRNG_SEED_L_WR(Device, PE_Number, ReseedData_p->SeedLo); |
| 99 | EIP96_PRNG_SEED_H_WR(Device, PE_Number, ReseedData_p->SeedHi); |
| 100 | |
| 101 | // Write new key data |
| 102 | EIP96_PRNG_KEY_0_L_WR(Device, PE_Number, ReseedData_p->Key0Lo); |
| 103 | EIP96_PRNG_KEY_0_H_WR(Device, PE_Number, ReseedData_p->Key0Hi); |
| 104 | EIP96_PRNG_KEY_1_L_WR(Device, PE_Number, ReseedData_p->Key1Lo); |
| 105 | EIP96_PRNG_KEY_1_H_WR(Device, PE_Number, ReseedData_p->Key1Hi); |
| 106 | |
| 107 | // Write new LFSR data |
| 108 | EIP96_PRNG_LFSR_L_WR(Device, PE_Number, ReseedData_p->LFSRLo); |
| 109 | EIP96_PRNG_LFSR_H_WR(Device, PE_Number, ReseedData_p->LFSRHi); |
| 110 | |
| 111 | EIP96_PRNG_CTRL_WR(Device, |
| 112 | PE_Number, // EIP-96 PE number |
| 113 | true, // Enable PRNG |
| 114 | true); // Set PRNG Auto mode |
| 115 | |
| 116 | return EIP97_GLOBAL_NO_ERROR; |
| 117 | } |
| 118 | |
| 119 | |
| 120 | /* end of file eip97_global_prng.c */ |