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_4.5"
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 void *p = __vdsosym(VDSO_FLUSH_ICACHE_VER, VDSO_FLUSH_ICACHE_SYM);
31 int (*f)(void *, void *, unsigned long int) =
32 (int (*)(void *, void *, unsigned long int))p;
33 a_cas_p(&vdso_func, (void *)flush_icache_init, p);
34 return f ? f(start, end, flags) : -ENOSYS;
35 }
36
37 static void *volatile vdso_func = (void *)flush_icache_init;
38
__riscv_flush_icache(void * start,void * end,unsigned long int flags)39 int __riscv_flush_icache(void *start, void *end, unsigned long int flags)
40 {
41 int (*f)(void *, void *, unsigned long int) =
42 (int (*)(void *, void *, unsigned long int))vdso_func;
43 if (f) {
44 int r = f(start, end, flags);
45 if (!r) return r;
46 if (r != -ENOSYS) return __syscall_ret(r);
47 }
48 }
49 weak_alias(__riscv_flush_icache, riscv_flush_icache);
50 #endif
51