51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
#include <errno.h>
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#include "syscall.h"
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#include "atomic.h"
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#ifdef SYS_cacheflush
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int _flush_cache(void *addr, int len, int op)
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{
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return syscall(SYS_cacheflush, addr, len, op);
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}
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weak_alias(_flush_cache, cacheflush);
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#endif
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#ifdef SYS_cachectl
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int __cachectl(void *addr, int len, int op)
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{
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return syscall(SYS_cachectl, addr, len, op);
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}
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weak_alias(__cachectl, cachectl);
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#endif
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#ifdef SYS_riscv_flush_icache
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#define VDSO_FLUSH_ICACHE_SYM "__vdso_flush_icache"
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#define VDSO_FLUSH_ICACHE_VER "LINUX_4.5"
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static void *volatile vdso_func;
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static int flush_icache_init(void *start, void *end, unsigned long int flags)
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{
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void *p = __vdsosym(VDSO_FLUSH_ICACHE_VER, VDSO_FLUSH_ICACHE_SYM);
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int (*f)(void *, void *, unsigned long int) =
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(int (*)(void *, void *, unsigned long int))p;
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a_cas_p(&vdso_func, (void *)flush_icache_init, p);
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return f ? f(start, end, flags) : -ENOSYS;
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}
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static void *volatile vdso_func = (void *)flush_icache_init;
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int __riscv_flush_icache(void *start, void *end, unsigned long int flags)
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{
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int (*f)(void *, void *, unsigned long int) =
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(int (*)(void *, void *, unsigned long int))vdso_func;
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if (f) {
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int r = f(start, end, flags);
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if (!r) return r;
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if (r != -ENOSYS) return __syscall_ret(r);
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}
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}
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weak_alias(__riscv_flush_icache, riscv_flush_icache);
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#endif
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