1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2022 StarFive Technology Co., Ltd.
4 * Author: Yanhong Wang<yanhong.wang@starfivetech.com>
10 #include <linux/bitops.h>
12 #define JH7110_L2_PREFETCHER_BASE_ADDR 0x2030000
13 #define JH7110_L2_PREFETCHER_HART_OFFSET 0x2000
15 /* enable U74-mc hart1~hart4 prefetcher */
16 static void enable_prefetcher(void)
21 /* JH7110 use U74MC CORE IP, it include five cores(one S7 and four U7),
22 * but only U7 cores support prefetcher configuration
24 for (hart = 1; hart < 5; hart++) {
25 reg = (void *)(u64)(JH7110_L2_PREFETCHER_BASE_ADDR
26 + hart * JH7110_L2_PREFETCHER_HART_OFFSET);
28 mb(); /* memory barrier */
29 setbits_le32(reg, 0x1);
30 mb(); /* memory barrier */