From 4abab5ad6c8465a7528ccdd5f49367da05f78bbd Mon Sep 17 00:00:00 2001 From: Vladimir Azarov Date: Tue, 1 Oct 2024 15:47:05 +0200 Subject: Initial version --- src/linux/cache.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 src/linux/cache.c (limited to 'src/linux/cache.c') diff --git a/src/linux/cache.c b/src/linux/cache.c new file mode 100644 index 0000000..e76f781 --- /dev/null +++ b/src/linux/cache.c @@ -0,0 +1,51 @@ +#include +#include "syscall.h" +#include "atomic.h" + +#ifdef SYS_cacheflush +int _flush_cache(void *addr, int len, int op) +{ + return syscall(SYS_cacheflush, addr, len, op); +} +weak_alias(_flush_cache, cacheflush); +#endif + +#ifdef SYS_cachectl +int __cachectl(void *addr, int len, int op) +{ + return syscall(SYS_cachectl, addr, len, op); +} +weak_alias(__cachectl, cachectl); +#endif + +#ifdef SYS_riscv_flush_icache + +#define VDSO_FLUSH_ICACHE_SYM "__vdso_flush_icache" +#define VDSO_FLUSH_ICACHE_VER "LINUX_4.15" + +static void *volatile vdso_func; + +static int flush_icache_init(void *start, void *end, unsigned long int flags) +{ + void *p = __vdsosym(VDSO_FLUSH_ICACHE_VER, VDSO_FLUSH_ICACHE_SYM); + int (*f)(void *, void *, unsigned long int) = + (int (*)(void *, void *, unsigned long int))p; + a_cas_p(&vdso_func, (void *)flush_icache_init, p); + return f ? f(start, end, flags) : -ENOSYS; +} + +static void *volatile vdso_func = (void *)flush_icache_init; + +int __riscv_flush_icache(void *start, void *end, unsigned long int flags) +{ + int (*f)(void *, void *, unsigned long int) = + (int (*)(void *, void *, unsigned long int))vdso_func; + if (f) { + int r = f(start, end, flags); + if (!r) return r; + if (r != -ENOSYS) return __syscall_ret(r); + } + return syscall(SYS_riscv_flush_icache, start, end, flags); +} +weak_alias(__riscv_flush_icache, riscv_flush_icache); +#endif -- cgit v1.2.3