1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
3
4 #include <linux/syscalls.h>
5 #include <asm/page.h>
6 #include <asm/cacheflush.h>
7 #include <asm/cachectl.h>
8
9 SYSCALL_DEFINE3(cacheflush,
10 void __user *, addr,
11 unsigned long, bytes,
12 int, cache)
13 {
14 switch (cache) {
15 case BCACHE:
16 case DCACHE:
17 dcache_wb_range((unsigned long)addr,
18 (unsigned long)addr + bytes);
19 if (cache != BCACHE)
20 break;
21 fallthrough;
22 case ICACHE:
23 flush_icache_mm_range(current->mm,
24 (unsigned long)addr,
25 (unsigned long)addr + bytes);
26 break;
27 default:
28 return -EINVAL;
29 }
30
31 return 0;
32 }
33
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