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 #elif defined(CONFIG_ARC_MMU_V4) 19 #define CONFIG_ARC_MMU_VER 4 20 #endif 21 22 /* MMU Management regs */ 23 #define ARC_REG_MMU_BCR 0x06f 24 #if (CONFIG_ARC_MMU_VER < 4) 25 #define ARC_REG_TLBPD0 0x405 26 #define ARC_REG_TLBPD1 0x406 27 #define ARC_REG_TLBINDEX 0x407 28 #define ARC_REG_TLBCOMMAND 0x408 29 #define ARC_REG_PID 0x409 30 #define ARC_REG_SCRATCH_DATA0 0x418 31 #else 32 #define ARC_REG_TLBPD0 0x460 33 #define ARC_REG_TLBPD1 0x461 34 #define ARC_REG_TLBINDEX 0x464 35 #define ARC_REG_TLBCOMMAND 0x465 36 #define ARC_REG_PID 0x468 37 #define ARC_REG_SCRATCH_DATA0 0x46c 38 #endif 39 40 /* Bits in MMU PID register */ 41 #define __TLB_ENABLE (1 << 31) 42 #define __PROG_ENABLE (1 << 30) 43 #define MMU_ENABLE (__TLB_ENABLE | __PROG_ENABLE) 44 45 /* Error code if probe fails */ 46 #define TLB_LKUP_ERR 0x80000000 47 48 #if (CONFIG_ARC_MMU_VER < 4) 49 #define TLB_DUP_ERR (TLB_LKUP_ERR | 0x00000001) 50 #else 51 #define TLB_DUP_ERR (TLB_LKUP_ERR | 0x40000000) 52 #endif 53 54 /* TLB Commands */ 55 #define TLBWrite 0x1 56 #define TLBRead 0x2 57 #define TLBGetIndex 0x3 58 #define TLBProbe 0x4 59 60 #if (CONFIG_ARC_MMU_VER >= 2) 61 #define TLBWriteNI 0x5 /* write JTLB without inv uTLBs */ 62 #define TLBIVUTLB 0x6 /* explicitly inv uTLBs */ 63 #endif 64 65 #if (CONFIG_ARC_MMU_VER >= 4) 66 #define TLBInsertEntry 0x7 67 #define TLBDeleteEntry 0x8 68 #endif 69 70 #ifndef __ASSEMBLY__ 71 72 typedef struct { 73 unsigned long asid[NR_CPUS]; /* 8 bit MMU PID + Generation cycle */ 74 } mm_context_t; 75 76 #ifdef CONFIG_ARC_DBG_TLB_PARANOIA 77 void tlb_paranoid_check(unsigned int mm_asid, unsigned long address); 78 #else 79 #define tlb_paranoid_check(a, b) 80 #endif 81 82 void arc_mmu_init(void); 83 extern char *arc_mmu_mumbojumbo(int cpu_id, char *buf, int len); 84 void read_decode_mmu_bcr(void); 85 86 #endif /* !__ASSEMBLY__ */ 87 88 #endif 89