| Alexey Brodkin | c15be5b | 2018-01-24 21:37:14 +0300 | [diff] [blame] | 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 | |
| Alexey Brodkin | c15be5b | 2018-01-24 21:37:14 +0300 | [diff] [blame] | 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 | |
| Alexey Brodkin | c15be5b | 2018-01-24 21:37:14 +0300 | [diff] [blame] | 58 | #define CONFIG_SYS_BOOTM_LEN SZ_128K |
| Alexey Brodkin | c15be5b | 2018-01-24 21:37:14 +0300 | [diff] [blame] | 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 |
| Alexey Brodkin | c15be5b | 2018-01-24 21:37:14 +0300 | [diff] [blame] | 69 | #endif /* _CONFIG_IOT_DEVKIT_H_ */ |