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1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
10 #include <linux/threads.h> /* NR_CPUS */
13 #if defined(CONFIG_ARC_MMU_V1)
14 #define CONFIG_ARC_MMU_VER 1
15 #elif defined(CONFIG_ARC_MMU_V2)
16 #define CONFIG_ARC_MMU_VER 2
17 #elif defined(CONFIG_ARC_MMU_V3)
18 #define CONFIG_ARC_MMU_VER 3
19 #elif defined(CONFIG_ARC_MMU_V4)
20 #define CONFIG_ARC_MMU_VER 4
23 /* MMU Management regs */
24 #define ARC_REG_MMU_BCR 0x06f
25 #if (CONFIG_ARC_MMU_VER < 4)
26 #define ARC_REG_TLBPD0 0x405
27 #define ARC_REG_TLBPD1 0x406
28 #define ARC_REG_TLBPD1HI 0 /* Dummy: allows code sharing with ARC700 */
29 #define ARC_REG_TLBINDEX 0x407
30 #define ARC_REG_TLBCOMMAND 0x408
31 #define ARC_REG_PID 0x409
32 #define ARC_REG_SCRATCH_DATA0 0x418
34 #define ARC_REG_TLBPD0 0x460
35 #define ARC_REG_TLBPD1 0x461
36 #define ARC_REG_TLBPD1HI 0x463
37 #define ARC_REG_TLBINDEX 0x464
38 #define ARC_REG_TLBCOMMAND 0x465
39 #define ARC_REG_PID 0x468
40 #define ARC_REG_SCRATCH_DATA0 0x46c
43 /* Bits in MMU PID register */
44 #define __TLB_ENABLE (1 << 31)
45 #define __PROG_ENABLE (1 << 30)
46 #define MMU_ENABLE (__TLB_ENABLE | __PROG_ENABLE)
48 /* Error code if probe fails */
49 #define TLB_LKUP_ERR 0x80000000
51 #if (CONFIG_ARC_MMU_VER < 4)
52 #define TLB_DUP_ERR (TLB_LKUP_ERR | 0x00000001)
54 #define TLB_DUP_ERR (TLB_LKUP_ERR | 0x40000000)
60 #define TLBGetIndex 0x3
63 #if (CONFIG_ARC_MMU_VER >= 2)
64 #define TLBWriteNI 0x5 /* write JTLB without inv uTLBs */
65 #define TLBIVUTLB 0x6 /* explicitly inv uTLBs */
68 #if (CONFIG_ARC_MMU_VER >= 4)
69 #define TLBInsertEntry 0x7
70 #define TLBDeleteEntry 0x8
76 unsigned long asid
[NR_CPUS
]; /* 8 bit MMU PID + Generation cycle */
79 #ifdef CONFIG_ARC_DBG_TLB_PARANOIA
80 void tlb_paranoid_check(unsigned int mm_asid
, unsigned long address
);
82 #define tlb_paranoid_check(a, b)
85 void arc_mmu_init(void);
86 extern char *arc_mmu_mumbojumbo(int cpu_id
, char *buf
, int len
);
87 void read_decode_mmu_bcr(void);
89 static inline int is_pae40_enabled(void)
91 return IS_ENABLED(CONFIG_ARC_HAS_PAE40
);
94 extern int pae40_exist_but_not_enab(void);
96 #endif /* !__ASSEMBLY__ */