xref: /openbmc/u-boot/arch/powerpc/cpu/mpc8xx/cache.c (revision 78a88f79)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2017
4  * Christophe Leroy, CS Systemes d'Information, christophe.leroy@c-s.fr
5  */
6 
7 #include <common.h>
8 #include <asm/processor.h>
9 #include <asm/ppc.h>
10 #include <asm/io.h>
11 #include <asm/mmu.h>
12 
13 int icache_status(void)
14 {
15 	return !!(mfspr(IC_CST) & IDC_ENABLED);
16 }
17 
18 void icache_enable(void)
19 {
20 	sync();
21 	mtspr(IC_CST, IDC_INVALL);
22 	mtspr(IC_CST, IDC_ENABLE);
23 }
24 
25 void icache_disable(void)
26 {
27 	sync();
28 	mtspr(IC_CST, IDC_DISABLE);
29 }
30 
31 int dcache_status(void)
32 {
33 	return !!(mfspr(IC_CST) & IDC_ENABLED);
34 }
35 
36 void dcache_enable(void)
37 {
38 	mtspr(MD_CTR, MD_RESETVAL);	/* Set cache mode with MMU off */
39 	mtspr(DC_CST, IDC_INVALL);
40 	mtspr(DC_CST, IDC_ENABLE);
41 }
42 
43 void dcache_disable(void)
44 {
45 	sync();
46 	mtspr(DC_CST, IDC_DISABLE);
47 	mtspr(DC_CST, IDC_INVALL);
48 }
49