Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2017 Chen Liqin <liqin.chen@sunplusct.com>
4 * Copyright (C) 2012 Regents of the University of California
5 */
6
7#ifndef _ASM_RISCV_CACHE_H
8#define _ASM_RISCV_CACHE_H
9
10#define L1_CACHE_SHIFT 6
11
12#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
13
14#ifdef CONFIG_RISCV_DMA_NONCOHERENT
15#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
16#define ARCH_KMALLOC_MINALIGN (8)
17#endif
18
19/*
20 * RISC-V requires the stack pointer to be 16-byte aligned, so ensure that
21 * the flat loader aligns it accordingly.
22 */
23#ifndef CONFIG_MMU
24#define ARCH_SLAB_MINALIGN 16
25#endif
26
27#ifndef __ASSEMBLY__
28
29extern int dma_cache_alignment;
30#ifdef CONFIG_RISCV_DMA_NONCOHERENT
31#define dma_get_cache_alignment dma_get_cache_alignment
32static inline int dma_get_cache_alignment(void)
33{
34 return dma_cache_alignment;
35}
36#endif
37
38#endif /* __ASSEMBLY__ */
39
40#endif /* _ASM_RISCV_CACHE_H */