xref: /openbmc/linux/arch/sparc/include/asm/tsunami.h (revision b2441318)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * tsunami.h:  Module specific definitions for Tsunami V8 Sparcs
4  *
5  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6  */
7 
8 #ifndef _SPARC_TSUNAMI_H
9 #define _SPARC_TSUNAMI_H
10 
11 #include <asm/asi.h>
12 
13 /* The MMU control register on the Tsunami:
14  *
15  * -----------------------------------------------------------------------
16  * | implvers |SW|AV|DV|MV| RSV |PC|ITD|ALC| RSV |PE| RC |IE|DE|RSV|NF|ME|
17  * -----------------------------------------------------------------------
18  *  31      24 23 22 21 20 19-18 17  16 14  13-12 11 10-9  8  7 6-2  1  0
19  *
20  * SW: Enable Software Table Walks  0=off 1=on
21  * AV: Address View bit
22  * DV: Data View bit
23  * MV: Memory View bit
24  * PC: Parity Control
25  * ITD: ITBR disable
26  * ALC: Alternate Cacheable
27  * PE: Parity Enable   0=off 1=on
28  * RC: Refresh Control
29  * IE: Instruction cache Enable  0=off 1=on
30  * DE: Data cache Enable  0=off 1=on
31  * NF: No Fault, same as all other SRMMUs
32  * ME: MMU Enable, same as all other SRMMUs
33  */
34 
35 #define TSUNAMI_SW        0x00800000
36 #define TSUNAMI_AV        0x00400000
37 #define TSUNAMI_DV        0x00200000
38 #define TSUNAMI_MV        0x00100000
39 #define TSUNAMI_PC        0x00020000
40 #define TSUNAMI_ITD       0x00010000
41 #define TSUNAMI_ALC       0x00008000
42 #define TSUNAMI_PE        0x00001000
43 #define TSUNAMI_RCMASK    0x00000C00
44 #define TSUNAMI_IENAB     0x00000200
45 #define TSUNAMI_DENAB     0x00000100
46 #define TSUNAMI_NF        0x00000002
47 #define TSUNAMI_ME        0x00000001
48 
tsunami_flush_icache(void)49 static inline void tsunami_flush_icache(void)
50 {
51 	__asm__ __volatile__("sta %%g0, [%%g0] %0\n\t"
52 			     : /* no outputs */
53 			     : "i" (ASI_M_IC_FLCLEAR)
54 			     : "memory");
55 }
56 
tsunami_flush_dcache(void)57 static inline void tsunami_flush_dcache(void)
58 {
59 	__asm__ __volatile__("sta %%g0, [%%g0] %0\n\t"
60 			     : /* no outputs */
61 			     : "i" (ASI_M_DC_FLCLEAR)
62 			     : "memory");
63 }
64 
65 #endif /* !(_SPARC_TSUNAMI_H) */
66