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f37af2760e
add block storage emulation for NVM XIP flash devices
Some paltforms such as Corstone-1000 need to see NVM XIP raw flash
as a block storage device with read only capability.
Here NVM flash devices are devices with addressable
memory (e.g: QSPI NOR flash).
The implementation is generic and can be used by different platforms.
Two drivers are provided as follows.
nvmxip-blk :
a generic block driver allowing to read from the XIP flash
nvmxip Uclass driver :
When a device is described in the DT and associated with
UCLASS_NVMXIP, the Uclass creates a block device and binds it with
the nvmxip-blk.
Platforms can use multiple NVM XIP devices at the same time by defining a
DT node for each one of them.
Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com>
32 lines
677 B
C
32 lines
677 B
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright 2023 Arm Limited and/or its affiliates <open-source-office@arm.com>
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*
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* Authors:
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* Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com>
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*/
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#ifndef __DRIVER_NVMXIP_H__
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#define __DRIVER_NVMXIP_H__
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#include <blk.h>
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#define NVMXIP_BLKDRV_NAME "nvmxip-blk"
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#define NVMXIP_BLKDEV_NAME_SZ 20
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/**
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* struct nvmxip_plat - the NVMXIP driver plat
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*
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* @phys_base: NVM XIP device base address
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* @lba_shift: block size shift count
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* @lba: number of blocks
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*
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* The NVMXIP information read from the DT.
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*/
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struct nvmxip_plat {
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phys_addr_t phys_base;
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u32 lba_shift;
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lbaint_t lba;
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};
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#endif /* __DRIVER_NVMXIP_H__ */
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