1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2002
4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5  */
6 
7 #include <common.h>
8 #include <cpu_func.h>
9 #include <asm/cache.h>
10 #include <watchdog.h>
11 
flush_cache(ulong start_addr,ulong size)12 void flush_cache(ulong start_addr, ulong size)
13 {
14 #ifndef CONFIG_5xx
15 	ulong addr, start, end;
16 
17 	start = start_addr & ~(CONFIG_SYS_CACHELINE_SIZE - 1);
18 	end = start_addr + size - 1;
19 
20 	for (addr = start; (addr <= end) && (addr >= start);
21 			addr += CONFIG_SYS_CACHELINE_SIZE) {
22 		asm volatile("dcbst 0,%0" : : "r" (addr) : "memory");
23 		WATCHDOG_RESET();
24 	}
25 	/* wait for all dcbst to complete on bus */
26 	asm volatile("sync" : : : "memory");
27 
28 	for (addr = start; (addr <= end) && (addr >= start);
29 			addr += CONFIG_SYS_CACHELINE_SIZE) {
30 		asm volatile("icbi 0,%0" : : "r" (addr) : "memory");
31 		WATCHDOG_RESET();
32 	}
33 	asm volatile("sync" : : : "memory");
34 	/* flush prefetch queue */
35 	asm volatile("isync" : : : "memory");
36 #endif
37 }
38