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|_| |_|_(_)_/ \_\ |_| |_| |_| \_/ \__,_|\__\___| |_____/|_| |_|\___V 2.1
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/* SPDX-License-Identifier: GPL-2.0-only
* Copyright (C) 2020 Marvell.
*/
#ifndef __SOC_OTX2_ASM_H
#define __SOC_OTX2_ASM_H
#include <linux/types.h>
#if defined(CONFIG_ARM64)
/*
* otx2_lmt_flush is used for LMT store operation.
* On octeontx2 platform CPT instruction enqueue and
* NIX packet send are only possible via LMTST
* operations and it uses LDEOR instruction targeting
* the coprocessor address.
*/
#define otx2_lmt_flush(ioaddr) \
({ \
u64 result = 0; \
__asm__ volatile(".cpu generic+lse\n" \
"ldeor xzr, %x[rf], [%[rs]]" \
: [rf]"=r" (result) \
: [rs]"r" (ioaddr)); \
(result); \
})
/*
* STEORL store to memory with release semantics.
* This will avoid using DMB barrier after each LMTST
* operation.
*/
#define cn10k_lmt_flush(val, addr) \
({ \
__asm__ volatile(".cpu generic+lse\n" \
"steorl %x[rf],[%[rs]]" \
: [rf] "+r"(val) \
: [rs] "r"(addr)); \
})
static inline u64 otx2_atomic64_fetch_add(u64 incr, u64 *ptr)
{
u64 result;
asm volatile (".cpu generic+lse\n"
"ldadda %x[i], %x[r], [%[b]]"
: [r] "=r" (result), "+m" (*ptr)
: [i] "r" (incr), [b] "r" (ptr)
: "memory");
return result;
}
#else
#define otx2_lmt_flush(ioaddr) ({ 0; })
#define cn10k_lmt_flush(val, addr) ({ addr = val; })
#define otx2_atomic64_fetch_add(incr, ptr) ({ incr; })
#endif
#endif /* __SOC_OTX2_ASM_H */