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https://github.com/brain-hackers/u-boot-brain
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d4ea649f17
In RISC-V, M-mode software can reserve physical memory regions by setting appropriate physical memory protection (PMP) csr. As the PMP csr are accessible only in M-mode, S-mode U-Boot can not read this configuration directly. However, M-mode software can pass this information via reserved-memory node in device tree so that S-mode software can access this information. This patch provides a framework to copy to the reserved-memory node from one DT to another. This will be used to update the DT used by U-Boot and the DT passed to the next stage OS. Signed-off-by: Atish Patra <atish.patra@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com>
24 lines
609 B
C
24 lines
609 B
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* Copyright (C) 2017 Andes Technology Corporation
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* Rick Chen, Andes Technology Corporation <rick@andestech.com>
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*/
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#ifndef _U_BOOT_RISCV_H_
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#define _U_BOOT_RISCV_H_ 1
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/* cpu/.../cpu.c */
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int cleanup_before_linux(void);
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/* board/.../... */
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int board_init(void);
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void board_quiesce_devices(void);
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int riscv_board_reserved_mem_fixup(void *fdt);
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int riscv_fdt_copy_resv_mem_node(const void *src_fdt, void *dest_fdt);
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#endif /* _U_BOOT_RISCV_H_ */
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