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 50 typedef struct { 51 unsigned long asid; /* 8 bit MMU PID + Generation cycle */ 52 } mm_context_t; 53 54 #ifdef CONFIG_ARC_DBG_TLB_PARANOIA 55 void tlb_paranoid_check(unsigned int mm_asid, unsigned long address); 56 #else 57 #define tlb_paranoid_check(a, b) 58 #endif 59 60 void arc_mmu_init(void); 61 extern char *arc_mmu_mumbojumbo(int cpu_id, char *buf, int len); 62 void read_decode_mmu_bcr(void); 63 64 #endif /* !__ASSEMBLY__ */ 65 66 #endif 67