mirror of
https://github.com/AsahiLinux/u-boot
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70 lines
2.3 KiB
C
70 lines
2.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2018 Synopsys, Inc. All rights reserved.
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*/
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#ifndef _CONFIG_IOT_DEVKIT_H_
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#define _CONFIG_IOT_DEVKIT_H_
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#include <linux/sizes.h>
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/*
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* MEMORY MAP
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*
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* eFlash: 0x0000_0000 - 0x0008_0000 (512K)
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* ICCM: 0x2000_0000 - 0x2004_0000 (256K)
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* SRAM: 0x3000_0000 - 0x3002_0000 (128K)
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* DCCM: 0x8000_0000 - 0x8002_0000 (128K)
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* Note: only data goes here, as IFQ cannot fetch instructions from DCCM
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*
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*
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* RAM PARTITIONING
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*
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* +-----------+----------+---------------------+-------------+
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* | <-- Stack | .data | Malloc | Environment |
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* +-----------+----------+---------------------+-------------+
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* : : : :\___________/
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* : : : : |
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* : : : : CONFIG_ENV_SIZE
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* : : \____________________/
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* : : |
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* : : CONFIG_SYS_MALLOC_LEN
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* : :
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* : Specified explicitly by CONFIG_SYS_INIT_SP_ADDR
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* :
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* Specified explicitly by CONFIG_SYS_SDRAM_BASE
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*
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* NOTES:
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* - Stack starts from CONFIG_SYS_INIT_SP_ADDR and grows down,
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* i.e. towards CONFIG_SYS_SDRAM_BASE but nothing stops it from crossing
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* that CONFIG_SYS_SDRAM_BASE in which case data won't be really saved on
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* stack any longer and values popped from stack will contain garbage
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* leading to unexpected behavior, typically but not limited to:
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* - "Returning" back to bogus caller function
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* - Reading data from weird addresses
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*/
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#define SRAM_BASE 0x30000000
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#define SRAM_SIZE SZ_128K
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#define DCCM_BASE 0x80000000
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#define DCCM_SIZE SZ_128K
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#define CONFIG_SYS_SDRAM_BASE DCCM_BASE
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#define CONFIG_SYS_SDRAM_SIZE DCCM_SIZE
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#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + SZ_32K)
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#define CONFIG_SYS_BOOTM_LEN SZ_128K
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#define ROM_BASE CONFIG_SYS_MONITOR_BASE
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#define ROM_SIZE SZ_256K
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#define RAM_DATA_BASE CONFIG_SYS_INIT_SP_ADDR
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#define RAM_DATA_SIZE CONFIG_SYS_SDRAM_SIZE - \
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(CONFIG_SYS_INIT_SP_ADDR - \
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CONFIG_SYS_SDRAM_BASE) - \
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CONFIG_SYS_MALLOC_LEN - \
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CONFIG_ENV_SIZE
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#endif /* _CONFIG_IOT_DEVKIT_H_ */
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