u-boot/arch/riscv/include/asm/u-boot-riscv.h
Atish Patra d4ea649f17 riscv: Provide a mechanism to fix DT for reserved memory
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>
2020-04-23 10:14:16 +08:00

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C

/* SPDX-License-Identifier: GPL-2.0+ */
/*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* Copyright (C) 2017 Andes Technology Corporation
* Rick Chen, Andes Technology Corporation <rick@andestech.com>
*/
#ifndef _U_BOOT_RISCV_H_
#define _U_BOOT_RISCV_H_ 1
/* cpu/.../cpu.c */
int cleanup_before_linux(void);
/* board/.../... */
int board_init(void);
void board_quiesce_devices(void);
int riscv_board_reserved_mem_fixup(void *fdt);
int riscv_fdt_copy_resv_mem_node(const void *src_fdt, void *dest_fdt);
#endif /* _U_BOOT_RISCV_H_ */