1 /* SPDX-License-Identifier: GPL-2.0-only
2 * Copyright (C) 2020 Marvell.
5 #ifndef __SOC_OTX2_ASM_H
6 #define __SOC_OTX2_ASM_H
8 #include <linux/types.h>
9 #if defined(CONFIG_ARM64)
11 * otx2_lmt_flush is used for LMT store operation.
12 * On octeontx2 platform CPT instruction enqueue and
13 * NIX packet send are only possible via LMTST
14 * operations and it uses LDEOR instruction targeting
15 * the coprocessor address.
17 #define otx2_lmt_flush(ioaddr) \
20 __asm__ volatile(".cpu generic+lse\n" \
21 "ldeor xzr, %x[rf], [%[rs]]" \
23 : [rs]"r" (ioaddr)); \
27 * STEORL store to memory with release semantics.
28 * This will avoid using DMB barrier after each LMTST
31 #define cn10k_lmt_flush(val, addr) \
33 __asm__ volatile(".cpu generic+lse\n" \
34 "steorl %x[rf],[%[rs]]" \
39 static inline u64 otx2_atomic64_fetch_add(u64 incr, u64 *ptr)
43 asm volatile (".cpu generic+lse\n"
44 "ldadda %x[i], %x[r], [%[b]]"
45 : [r] "=r" (result), "+m" (*ptr)
46 : [i] "r" (incr), [b] "r" (ptr)
52 #define otx2_lmt_flush(ioaddr) ({ 0; })
53 #define cn10k_lmt_flush(val, addr) ({ addr = val; })
54 #define otx2_atomic64_fetch_add(incr, ptr) ({ incr; })
57 #endif /* __SOC_OTX2_ASM_H */