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https://github.com/riscv-software-src/opensbi.git
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Bo Gan
914aeddaf1
sbi_load/store_loop read/write variable-length buffer unprivileged. Both function use the widest aligned 8/4/2/1 byte load/stores in each loop to reduce the total number of iterations. Also switch the scalar/vector misaligned handlers to make use of such functions to simplify code. Miscellaneous: remove the unnecessary [taddr] in inline assembly Signed-off-by: Bo Gan <ganboing@gmail.com> Tested-by: Anirudh Srinivasan <asrinivasan@oss.tenstorrent.com> Reviewed-by: Anup Patel <anup@brainfault.org> Link: https://lore.kernel.org/r/20260609060024.706-4-ganboing@gmail.com Signed-off-by: Anup Patel <anup@brainfault.org>
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2019 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Anup Patel <anup.patel@wdc.com>
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*/
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#ifndef __SBI_UNPRIV_H__
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#define __SBI_UNPRIV_H__
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#include <sbi/sbi_types.h>
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struct sbi_scratch;
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struct sbi_trap_info;
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#define DECLARE_UNPRIVILEGED_LOAD_FUNCTION(type) \
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type sbi_load_##type(const type *addr, \
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struct sbi_trap_info *trap);
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#define DECLARE_UNPRIVILEGED_STORE_FUNCTION(type) \
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void sbi_store_##type(type *addr, type val, \
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struct sbi_trap_info *trap);
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DECLARE_UNPRIVILEGED_LOAD_FUNCTION(u8)
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DECLARE_UNPRIVILEGED_LOAD_FUNCTION(u16)
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DECLARE_UNPRIVILEGED_LOAD_FUNCTION(s8)
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DECLARE_UNPRIVILEGED_LOAD_FUNCTION(s16)
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DECLARE_UNPRIVILEGED_LOAD_FUNCTION(s32)
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DECLARE_UNPRIVILEGED_STORE_FUNCTION(u8)
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DECLARE_UNPRIVILEGED_STORE_FUNCTION(u16)
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DECLARE_UNPRIVILEGED_STORE_FUNCTION(u32)
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DECLARE_UNPRIVILEGED_LOAD_FUNCTION(u32)
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DECLARE_UNPRIVILEGED_LOAD_FUNCTION(u64)
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DECLARE_UNPRIVILEGED_STORE_FUNCTION(u64)
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DECLARE_UNPRIVILEGED_LOAD_FUNCTION(ulong)
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void sbi_load_loop(u8 *buffer, ulong addr, ulong len,
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struct sbi_trap_info *trap);
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void sbi_store_loop(u8 *buffer, ulong addr, ulong len,
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struct sbi_trap_info *trap);
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ulong sbi_get_insn(ulong mepc, struct sbi_trap_info *trap);
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#endif
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