1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2022 StarFive Technology Co., Ltd.
4  * Author: Yanhong Wang<yanhong.wang@starfivetech.com>
5  */
6 
7 #include <common.h>
8 #include <asm/io.h>
9 #include <cpu_func.h>
10 #include <linux/bitops.h>
11 
12 #define JH7110_L2_PREFETCHER_BASE_ADDR		0x2030000
13 #define JH7110_L2_PREFETCHER_HART_OFFSET	0x2000
14 
15 /* enable U74-mc hart1~hart4 prefetcher */
enable_prefetcher(void)16 static void enable_prefetcher(void)
17 {
18 	u8 hart;
19 	u32 *reg;
20 
21 	/* JH7110 use U74MC CORE IP, it include five cores(one S7 and four U7),
22 	 * but only U7 cores support prefetcher configuration
23 	 */
24 	for (hart = 1; hart < 5; hart++) {
25 		reg = (void *)(u64)(JH7110_L2_PREFETCHER_BASE_ADDR
26 					+ hart * JH7110_L2_PREFETCHER_HART_OFFSET);
27 
28 		mb(); /* memory barrier */
29 		setbits_le32(reg, 0x1);
30 		mb(); /* memory barrier */
31 	}
32 }
33 
board_init(void)34 int board_init(void)
35 {
36 	enable_caches();
37 	enable_prefetcher();
38 
39 	return 0;
40 }
41