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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 * Copyright (C) 2020 Marvell.
3 */
4
5#ifndef __SOC_OTX2_ASM_H
6#define __SOC_OTX2_ASM_H
7
8#if defined(CONFIG_ARM64)
9/*
10 * otx2_lmt_flush is used for LMT store operation.
11 * On octeontx2 platform CPT instruction enqueue and
12 * NIX packet send are only possible via LMTST
13 * operations and it uses LDEOR instruction targeting
14 * the coprocessor address.
15 */
16#define otx2_lmt_flush(ioaddr) \
17({ \
18 u64 result = 0; \
19 __asm__ volatile(".cpu generic+lse\n" \
20 "ldeor xzr, %x[rf], [%[rs]]" \
21 : [rf]"=r" (result) \
22 : [rs]"r" (ioaddr)); \
23 (result); \
24})
25#define cn10k_lmt_flush(val, addr) \
26({ \
27 __asm__ volatile(".cpu generic+lse\n" \
28 "steor %x[rf],[%[rs]]" \
29 : [rf]"+r"(val) \
30 : [rs]"r"(addr)); \
31})
32#else
33#define otx2_lmt_flush(ioaddr) ({ 0; })
34#define cn10k_lmt_flush(val, addr) ({ addr = val; })
35#endif
36
37#endif /* __SOC_OTX2_ASM_H */