tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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/* TLB Commands */
36#define TLBWrite 0x1
37#define TLBRead 0x2
38#define TLBGetIndex 0x3
39#define TLBProbe 0x4
40
41#if (CONFIG_ARC_MMU_VER >= 2)
42#define TLBWriteNI 0x5 /* write JTLB without inv uTLBs */
43#define TLBIVUTLB 0x6 /* explicitly inv uTLBs */
44#endif
45
46#ifndef __ASSEMBLY__
47
48typedef struct {
49 unsigned long asid; /* Pvt Addr-Space ID for mm */
50#ifdef CONFIG_ARC_TLB_DBG
51 struct task_struct *tsk;
52#endif
53} mm_context_t;
54
55#ifdef CONFIG_ARC_DBG_TLB_PARANOIA
56void tlb_paranoid_check(unsigned int pid_sw, unsigned long address);
57#else
58#define tlb_paranoid_check(a, b)
59#endif
60
61void arc_mmu_init(void);
62extern char *arc_mmu_mumbojumbo(int cpu_id, char *buf, int len);
63void __init read_decode_mmu_bcr(void);
64
65#endif /* !__ASSEMBLY__ */
66
67#endif