1 /*
2  * Non-crypto strength model of the True Random Number Generator
3  * in the AMD/Xilinx Versal device family.
4  *
5  * Copyright (c) 2017-2020 Xilinx Inc.
6  * Copyright (c) 2023 Advanced Micro Devices, Inc.
7  *
8  * Permission is hereby granted, free of charge, to any person obtaining a copy
9  * of this software and associated documentation files (the "Software"), to deal
10  * in the Software without restriction, including without limitation the rights
11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12  * copies of the Software, and to permit persons to whom the Software is
13  * furnished to do so, subject to the following conditions:
14  *
15  * The above copyright notice and this permission notice shall be included in
16  * all copies or substantial portions of the Software.
17  *
18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24  * THE SOFTWARE.
25  */
26 #ifndef XLNX_VERSAL_TRNG_H
27 #define XLNX_VERSAL_TRNG_H
28 
29 #include "hw/irq.h"
30 #include "hw/sysbus.h"
31 #include "hw/register.h"
32 
33 #define TYPE_XLNX_VERSAL_TRNG "xlnx.versal-trng"
34 OBJECT_DECLARE_SIMPLE_TYPE(XlnxVersalTRng, XLNX_VERSAL_TRNG);
35 
36 #define RMAX_XLNX_VERSAL_TRNG ((0xf0 / 4) + 1)
37 
38 typedef struct XlnxVersalTRng {
39     SysBusDevice parent_obj;
40     qemu_irq irq;
41     GRand *prng;
42 
43     uint32_t hw_version;
44     uint32_t forced_faults;
45 
46     uint32_t rand_count;
47     uint64_t rand_reseed;
48 
49     uint64_t forced_prng_seed;
50     uint64_t forced_prng_count;
51     uint64_t tst_seed[2];
52 
53     RegisterInfoArray *reg_array;
54     uint32_t regs[RMAX_XLNX_VERSAL_TRNG];
55     RegisterInfo regs_info[RMAX_XLNX_VERSAL_TRNG];
56 } XlnxVersalTRng;
57 
58 #undef RMAX_XLNX_VERSAL_TRNG
59 #endif
60