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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*/
#ifndef _ASM_ARC_MMU_H
#define _ASM_ARC_MMU_H
#ifndef __ASSEMBLY__
#include <linux/threads.h> /* NR_CPUS */
#endif
#if defined(CONFIG_ARC_MMU_V1)
#define CONFIG_ARC_MMU_VER 1
#elif defined(CONFIG_ARC_MMU_V2)
#define CONFIG_ARC_MMU_VER 2
#elif defined(CONFIG_ARC_MMU_V3)
#define CONFIG_ARC_MMU_VER 3
#elif defined(CONFIG_ARC_MMU_V4)
#define CONFIG_ARC_MMU_VER 4
#endif
/* MMU Management regs */
#define ARC_REG_MMU_BCR 0x06f
#if (CONFIG_ARC_MMU_VER < 4)
#define ARC_REG_TLBPD0 0x405
#define ARC_REG_TLBPD1 0x406
#define ARC_REG_TLBPD1HI 0 /* Dummy: allows code sharing with ARC700 */
#define ARC_REG_TLBINDEX 0x407
#define ARC_REG_TLBCOMMAND 0x408
#define ARC_REG_PID 0x409
#define ARC_REG_SCRATCH_DATA0 0x418
#else
#define ARC_REG_TLBPD0 0x460
#define ARC_REG_TLBPD1 0x461
#define ARC_REG_TLBPD1HI 0x463
#define ARC_REG_TLBINDEX 0x464
#define ARC_REG_TLBCOMMAND 0x465
#define ARC_REG_PID 0x468
#define ARC_REG_SCRATCH_DATA0 0x46c
#endif
#if defined(CONFIG_ISA_ARCV2) || !defined(CONFIG_SMP)
#define ARC_USE_SCRATCH_REG
#endif
/* Bits in MMU PID register */
#define __TLB_ENABLE (1 << 31)
#define __PROG_ENABLE (1 << 30)
#define MMU_ENABLE (__TLB_ENABLE | __PROG_ENABLE)
/* Error code if probe fails */
#define TLB_LKUP_ERR 0x80000000
#if (CONFIG_ARC_MMU_VER < 4)
#define TLB_DUP_ERR (TLB_LKUP_ERR | 0x00000001)
#else
#define TLB_DUP_ERR (TLB_LKUP_ERR | 0x40000000)
#endif
/* TLB Commands */
#define TLBWrite 0x1
#define TLBRead 0x2
#define TLBGetIndex 0x3
#define TLBProbe 0x4
#if (CONFIG_ARC_MMU_VER >= 2)
#define TLBWriteNI 0x5 /* write JTLB without inv uTLBs */
#define TLBIVUTLB 0x6 /* explicitly inv uTLBs */
#else
#define TLBWriteNI TLBWrite /* Not present in hardware, fallback */
#endif
#if (CONFIG_ARC_MMU_VER >= 4)
#define TLBInsertEntry 0x7
#define TLBDeleteEntry 0x8
#endif
#ifndef __ASSEMBLY__
typedef struct {
unsigned long asid[NR_CPUS]; /* 8 bit MMU PID + Generation cycle */
} mm_context_t;
#ifdef CONFIG_ARC_DBG_TLB_PARANOIA
void tlb_paranoid_check(unsigned int mm_asid, unsigned long address);
#else
#define tlb_paranoid_check(a, b)
#endif
void arc_mmu_init(void);
extern char *arc_mmu_mumbojumbo(int cpu_id, char *buf, int len);
void read_decode_mmu_bcr(void);
static inline int is_pae40_enabled(void)
{
return IS_ENABLED(CONFIG_ARC_HAS_PAE40);
}
extern int pae40_exist_but_not_enab(void);
#endif /* !__ASSEMBLY__ */
#endif
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