add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/riscv/include/asm/cache.h
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@@ -1,15 +1,7 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /*
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  * Copyright (C) 2017 Chen Liqin <liqin.chen@sunplusct.com>
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  * Copyright (C) 2012 Regents of the University of California
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- *
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- *   This program is free software; you can redistribute it and/or
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- *   modify it under the terms of the GNU General Public License
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- *   as published by the Free Software Foundation, version 2.
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- *
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- *   This program is distributed in the hope that it will be useful,
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- *   but WITHOUT ANY WARRANTY; without even the implied warranty of
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- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- *   GNU General Public License for more details.
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  */
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 #ifndef _ASM_RISCV_CACHE_H
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@@ -19,4 +11,12 @@
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 #define L1_CACHE_BYTES		(1 << L1_CACHE_SHIFT)
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+/*
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+ * RISC-V requires the stack pointer to be 16-byte aligned, so ensure that
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+ * the flat loader aligns it accordingly.
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+ */
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+#ifndef CONFIG_MMU
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+#define ARCH_SLAB_MINALIGN	16
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+#endif
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+
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 #endif /* _ASM_RISCV_CACHE_H */