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 CONFIG_SYS_MONITOR_BASE         CONFIG_SYS_TEXT_BASE
  48
  49 #define SRAM_BASE                       0x30000000
  50 #define SRAM_SIZE                       SZ_128K
  51
  52 #define DCCM_BASE                       0x80000000
  53 #define DCCM_SIZE                       SZ_128K
  54
  55 #define CONFIG_SYS_SDRAM_BASE           DCCM_BASE
  56 #define CONFIG_SYS_SDRAM_SIZE           DCCM_SIZE
  57
  58 #define CONFIG_SYS_INIT_SP_ADDR         (CONFIG_SYS_SDRAM_BASE + SZ_32K)
  59
  60 #define CONFIG_SYS_MALLOC_LEN           SZ_64K
  61 #define CONFIG_SYS_BOOTM_LEN            SZ_128K
  62 #define CONFIG_SYS_LOAD_ADDR            SRAM_BASE
  63
  64 #define ROM_BASE                        CONFIG_SYS_MONITOR_BASE
  65 #define ROM_SIZE                        SZ_256K
  66
  67 #define RAM_DATA_BASE                   CONFIG_SYS_INIT_SP_ADDR
  68 #define RAM_DATA_SIZE                   CONFIG_SYS_SDRAM_SIZE - \
  69                                         (CONFIG_SYS_INIT_SP_ADDR - \
  70                                         CONFIG_SYS_SDRAM_BASE) - \
  71                                         CONFIG_SYS_MALLOC_LEN - \
  72                                         CONFIG_ENV_SIZE
  73
  74 /*
  75  * Environment
  76  */
  77 #define CONFIG_ENV_SIZE                 SZ_4K
  78 #define CONFIG_BOOTFILE                 "app.bin"
  79 #define CONFIG_LOADADDR                 CONFIG_SYS_LOAD_ADDR
  80
  81 #endif /* _CONFIG_IOT_DEVKIT_H_ */