Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include <linux/syscalls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <asm/cacheflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <asm/cachectl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) SYSCALL_DEFINE3(cacheflush,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 		void __user *, addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 		unsigned long, bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 		int, cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	switch (cache) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	case BCACHE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	case DCACHE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 		dcache_wb_range((unsigned long)addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 				(unsigned long)addr + bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		if (cache != BCACHE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 		fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	case ICACHE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 		flush_icache_mm_range(current->mm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 				(unsigned long)addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 				(unsigned long)addr + bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) }