1/*
2 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8
9#ifndef _ASM_ARC_MMU_H
10#define _ASM_ARC_MMU_H
11
12#if defined(CONFIG_ARC_MMU_V1)
13#define CONFIG_ARC_MMU_VER 1
14#elif defined(CONFIG_ARC_MMU_V2)
15#define CONFIG_ARC_MMU_VER 2
16#elif defined(CONFIG_ARC_MMU_V3)
17#define CONFIG_ARC_MMU_VER 3
18#endif
19
20/* MMU Management regs */
21#define ARC_REG_MMU_BCR		0x06f
22#define ARC_REG_TLBPD0		0x405
23#define ARC_REG_TLBPD1		0x406
24#define ARC_REG_TLBINDEX	0x407
25#define ARC_REG_TLBCOMMAND	0x408
26#define ARC_REG_PID		0x409
27#define ARC_REG_SCRATCH_DATA0	0x418
28
29/* Bits in MMU PID register */
30#define MMU_ENABLE		(1 << 31)	/* Enable MMU for process */
31
32/* Error code if probe fails */
33#define TLB_LKUP_ERR		0x80000000
34
35#define TLB_DUP_ERR	(TLB_LKUP_ERR | 0x00000001)
36
37/* TLB Commands */
38#define TLBWrite    0x1
39#define TLBRead     0x2
40#define TLBGetIndex 0x3
41#define TLBProbe    0x4
42
43#if (CONFIG_ARC_MMU_VER >= 2)
44#define TLBWriteNI  0x5		/* write JTLB without inv uTLBs */
45#define TLBIVUTLB   0x6		/* explicitly inv uTLBs */
46#endif
47
48#ifndef __ASSEMBLY__
49
50typedef struct {
51	unsigned long asid[NR_CPUS];	/* 8 bit MMU PID + Generation cycle */
52} mm_context_t;
53
54#ifdef CONFIG_ARC_DBG_TLB_PARANOIA
55void tlb_paranoid_check(unsigned int mm_asid, unsigned long address);
56#else
57#define tlb_paranoid_check(a, b)
58#endif
59
60void arc_mmu_init(void);
61extern char *arc_mmu_mumbojumbo(int cpu_id, char *buf, int len);
62void read_decode_mmu_bcr(void);
63
64#endif	/* !__ASSEMBLY__ */
65
66#endif
67