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lib: utils: Add FDT cache library

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Add the FDT cache library so we can build up the cache topology via the
'next-level-cache' DT property.

Co-developed-by: Vincent Chen <vincent.chen@sifive.com>
Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
Co-developed-by: Andy Chiu <andy.chiu@sifive.com>
Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
Signed-off-by: Nick Hu <nick.hu@sifive.com>
Reviewed-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20251020-cache-upstream-v7-2-69a132447d8a@sifive.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Nick Hu
2025-10-20 14:34:04 +08:00
committed by Anup Patel
parent 1207c7568f
commit d6b684ec86
6 changed files with 134 additions and 0 deletions
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34
include/sbi_utils/cache/fdt_cache.h vendored Normal file
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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2025 SiFive Inc.
*/
#ifndef __FDT_CACHE_H__
#define __FDT_CACHE_H__
#include <sbi_utils/cache/cache.h>
/**
* Register a cache device using information from the DT
*
* @param fdt devicetree blob
* @param noff offset of a node in the devicetree blob
* @param dev cache device to register for this devicetree node
*
* @return 0 on success, or a negative error code on failure
*/
int fdt_cache_add(const void *fdt, int noff, struct cache_device *dev);
/**
* Get the cache device referencd by the "next-level-cache" property of a DT node
*
* @param fdt devicetree blob
* @param noff offset of a node in the devicetree blob
* @param out_dev location to return the cache device
*
* @return 0 on success, or a negative error code on failure
*/
int fdt_next_cache_get(const void *fdt, int noff, struct cache_device **out_dev);
#endif