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1 #include <errno.h>
2 #include "syscall.h"
3 #include "atomic.h"
4 
5 #ifdef SYS_cacheflush
_flush_cache(void * addr,int len,int op)6 int _flush_cache(void *addr, int len, int op)
7 {
8 	return syscall(SYS_cacheflush, addr, len, op);
9 }
10 weak_alias(_flush_cache, cacheflush);
11 #endif
12 
13 #ifdef SYS_cachectl
__cachectl(void * addr,int len,int op)14 int __cachectl(void *addr, int len, int op)
15 {
16 	return syscall(SYS_cachectl, addr, len, op);
17 }
18 weak_alias(__cachectl, cachectl);
19 #endif
20 
21 #ifdef SYS_riscv_flush_icache
22 
23 #define VDSO_FLUSH_ICACHE_SYM "__vdso_flush_icache"
24 #define VDSO_FLUSH_ICACHE_VER "LINUX_4.15"
25 
26 static void *volatile vdso_func;
27 
flush_icache_init(void * start,void * end,unsigned long int flags)28 static int flush_icache_init(void *start, void *end, unsigned long int flags)
29 {
30 #ifndef __LITEOS__
31 	__get_vdso_info();
32 	void *p = __get_vdso_addr(VDSO_FLUSH_ICACHE_VER, VDSO_FLUSH_ICACHE_SYM);
33 #else
34 	void *p = __vdsosym(VDSO_FLUSH_ICACHE_VER, VDSO_FLUSH_ICACHE_SYM);
35 #endif
36 	int (*f)(void *, void *, unsigned long int) =
37 		(int (*)(void *, void *, unsigned long int))p;
38 	a_cas_p(&vdso_func, (void *)flush_icache_init, p);
39 	return f ? f(start, end, flags) : -ENOSYS;
40 }
41 
42 static void *volatile vdso_func = (void *)flush_icache_init;
43 
__riscv_flush_icache(void * start,void * end,unsigned long int flags)44 int __riscv_flush_icache(void *start, void *end, unsigned long int flags)
45 {
46 	int (*f)(void *, void *, unsigned long int) =
47 		(int (*)(void *, void *, unsigned long int))vdso_func;
48 	if (f) {
49 		int r = f(start, end, flags);
50 		if (!r) return r;
51 		if (r != -ENOSYS) return __syscall_ret(r);
52 	}
53 	return syscall(SYS_riscv_flush_icache, start, end, flags);
54 }
55 weak_alias(__riscv_flush_icache, riscv_flush_icache);
56 #endif
57