Merge tag 'u-boot-at91-2022.07-a' of https://source.denx.de/u-boot/custodians/u-boot...
[platform/kernel/u-boot.git] / include / configs / iot_devkit.h
1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * Copyright (C) 2018 Synopsys, Inc. All rights reserved.
4  */
5
6 #ifndef _CONFIG_IOT_DEVKIT_H_
7 #define _CONFIG_IOT_DEVKIT_H_
8
9 #include <linux/sizes.h>
10
11 /*
12  *                         MEMORY MAP
13  *
14  * eFlash: 0x0000_0000 - 0x0008_0000 (512K)
15  *   ICCM: 0x2000_0000 - 0x2004_0000 (256K)
16  *   SRAM: 0x3000_0000 - 0x3002_0000 (128K)
17  *   DCCM: 0x8000_0000 - 0x8002_0000 (128K)
18  *     Note: only data goes here, as IFQ cannot fetch instructions from DCCM
19  *
20  *
21  *                         RAM PARTITIONING
22  *
23  *   +-----------+----------+---------------------+-------------+
24  *   | <-- Stack |  .data   | Malloc              | Environment |
25  *   +-----------+----------+---------------------+-------------+
26  *   :           :          :                     :\___________/
27  *   :           :          :                     :      |
28  *   :           :          :                     :     CONFIG_ENV_SIZE
29  *   :           :           \____________________/
30  *   :           :                     |
31  *   :           :                    CONFIG_SYS_MALLOC_LEN
32  *   :           :
33  *   :          Specified explicitly by CONFIG_SYS_INIT_SP_ADDR
34  *   :
35  *  Specified explicitly by CONFIG_SYS_SDRAM_BASE
36  *
37  *  NOTES:
38  *    - Stack starts from CONFIG_SYS_INIT_SP_ADDR and grows down,
39  *      i.e. towards CONFIG_SYS_SDRAM_BASE but nothing stops it from crossing
40  *      that CONFIG_SYS_SDRAM_BASE in which case data won't be really saved on
41  *      stack any longer and values popped from stack will contain garbage
42  *      leading to unexpected behavior, typically but not limited to:
43  *        - "Returning" back to bogus caller function
44  *        - Reading data from weird addresses
45  */
46
47 #define SRAM_BASE                       0x30000000
48 #define SRAM_SIZE                       SZ_128K
49
50 #define DCCM_BASE                       0x80000000
51 #define DCCM_SIZE                       SZ_128K
52
53 #define CONFIG_SYS_SDRAM_BASE           DCCM_BASE
54 #define CONFIG_SYS_SDRAM_SIZE           DCCM_SIZE
55
56 #define CONFIG_SYS_INIT_SP_ADDR         (CONFIG_SYS_SDRAM_BASE + SZ_32K)
57
58 #define CONFIG_SYS_BOOTM_LEN            SZ_128K
59
60 #define ROM_BASE                        CONFIG_SYS_MONITOR_BASE
61 #define ROM_SIZE                        SZ_256K
62
63 #define RAM_DATA_BASE                   CONFIG_SYS_INIT_SP_ADDR
64 #define RAM_DATA_SIZE                   CONFIG_SYS_SDRAM_SIZE - \
65                                         (CONFIG_SYS_INIT_SP_ADDR - \
66                                         CONFIG_SYS_SDRAM_BASE) - \
67                                         CONFIG_SYS_MALLOC_LEN - \
68                                         CONFIG_ENV_SIZE
69 #endif /* _CONFIG_IOT_DEVKIT_H_ */