186 lines
6.4 KiB
C
186 lines
6.4 KiB
C
/*
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* E2K ISET V6-... MMU structure and common definitions.
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*
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* Copyright 2018 (c) MCST, Salavat S. Guiliazov (atic@mcst.ru)
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*/
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#ifndef _ASM_E2K_MMU_REGS_TYPES_V6_H
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#define _ASM_E2K_MMU_REGS_TYPES_V6_H
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/* Avoid header dependency loop of probe_entry_t and DTLB_ENTRY_PH_BOUND_V6 */
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#ifndef _E2K_TLB_REGS_TYPES_H_
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# error Do not include <asm/mmu-regs-types-v6.h> directly, use <asm/tlb_regs_types.h> instead
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#endif
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/*
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* This file contains the functions and defines necessary to modify and
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* use the E2K ISET V2-V5 page tables.
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* NOTE: E2K has four levels of page tables.
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*/
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#ifndef __ASSEMBLY__
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#include <linux/types.h>
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#include <linux/bug.h>
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#include <asm/mmu_types.h>
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/*
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* DTLB entry probe format
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*/
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#define DTLB_ENTRY_MT_exc_SHIFT_V6 8 /* shift of Memory Type field */
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/* for exceptions */
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#define DTLB_ENTRY_MT_BITS_NUM_V6 3 /* occupies 3 bits */
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#define DTLB_ENTRY_MT_ma_SHIFT_V6 48 /* shift of Memory Type field */
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/* for memory access */
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#define DTLB_ENTRY_PFN_SHIFT_V6 12 /* shift of Physical Page */
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/* Number */
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#define DTLB_ENTRY_ERROR_MASK_V6 0xe000000000000000ULL
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#define DTLB_ENTRY_PH_BOUND_V6 0x8000000000000000ULL
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#define DTLB_ENTRY_ILLEGAL_PAGE_V6 0x4000000000000000ULL
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#define DTLB_ENTRY_PAGE_MISS_V6 0x2000000000000000ULL
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#define DTLB_ENTRY_PROBE_SUCCESSFUL_V6 0x0000000000000080ULL
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#define DTLB_ENTRY_RES_BITS_V6 0x1000000000000000ULL
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#define DTLB_ENTRY_MISS_LEVEL_MASK_V6 0x0000000000000007ULL
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#define DTLB_ENTRY_TLB_HIT_V6 0x0000000000000020ULL
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#define DTLB_ENTRY_WR_exc_V6 0x0000000000000002ULL
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#define DTLB_ENTRY_PV_or_U_S_V6 0x0000000000000004ULL
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#define DTLB_ENTRY_VVA_V6 0x0000000000000008ULL
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#define DTLB_ENTRY_INT_PR_V6 0x0000000000000010ULL
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#define DTLB_ENTRY_G_V6 0x0000000000000020ULL
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#define DTLB_ENTRY_D_V6 0x0000000000000040ULL
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#define DTLB_ENTRY_NWA_V6 0x0000000000000080ULL
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#define DTLB_ENTRY_MT_exc_V6 /* 0x0000000000000700ULL */ \
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(((1ULL << DTLB_ENTRY_MT_BITS_NUM_V6) - 1) << \
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DTLB_ENTRY_MT_exc_SHIFT_V6)
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#define DTLB_ENTRY_NON_EX_V6 0x8000000000000000ULL
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#define DTLB_ENTRY_PHA_V6 /* 0x0000fffffffff000ULL */ \
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((((1ULL << E2K_MAX_PHYS_BITS_V6) - 1) >> \
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DTLB_ENTRY_PFN_SHIFT_V6) << \
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DTLB_ENTRY_PFN_SHIFT_V6)
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#define DTLB_ENTRY_MT_ma_V6 /* 0x0007000000000000ULL */ \
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(((1ULL << DTLB_ENTRY_MT_BITS_NUM_V6) - 1) << \
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DTLB_ENTRY_MT_ma_SHIFT_V6)
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#define DTLB_ENTRY_WR_int_V6 0x0008000000000000ULL
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#define DTLB_ENTRY_INTL_RD_V6 0x0010000000000000ULL
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#define DTLB_ENTRY_INTL_WR_V6 0x0020000000000000ULL
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/* MPT flags for 2/4Mb & 1Gb pages [46:45] */
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#define DTLB_ENTRY_MPT_FLAGS_V6 0x0000600000000000ULL
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#define DTLB_EP_RES_V6 0x003fffffffffffffULL
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#define DTLB_EP_FAULT_RES_V6 (~DTLB_EP_RES_V6)
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/*
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* DTLB address probe result format
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*/
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#define PH_ADDR_AP_RES_V6 /* 0x0000ffffffffffffULL */ \
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((1ULL << E2K_MAX_PHYS_BITS_V6) - 1)
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#define DISABLE_AP_RES_V6 DISABLE_EP_RES_V6 /* AP diasble result */
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/* [62] */
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#define ILLEGAL_PAGE_AP_RES_V6 ILLEGAL_PAGE_EP_RES_V6 /* illegal page */
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/* [58] */
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/* convert physical address to page frame number for DTLB */
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#define PA_TO_DTLB_ENTRY_PHA_V6(phys_addr) \
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(((e2k_addr_t)phys_addr) & DTLB_ENTRY_PHA_V6)
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/* convert the page frame number from DTLB entry to physical address */
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#define DTLB_ENTRY_PHA_TO_PA_V6(dtlb_entry) \
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((e2k_addr_t)(dtlb_entry) & DTLB_ENTRY_PHA_V6)
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/* get/set Memory Type field from/to DTLB entry */
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#define DTLB_ENTRY_MT_exc_GET_VAL(x) \
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(((x) & DTLB_ENTRY_MT_exc_V6) >> DTLB_ENTRY_MT_exc_SHIFT_V6)
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#define DTLB_ENTRY_MT_exc_SET_VAL(x, mt) \
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(((x) & ~DTLB_ENTRY_MT_exc_V6) | \
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(((probe_entry_t)(mt) << DTLB_ENTRY_MT_exc_SHIFT_V6) & \
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DTLB_ENTRY_MT_exc_V6))
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#define DTLB_ENTRY_MT_ma_GET_VAL(x) \
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(((x) & DTLB_ENTRY_MT_ma_V6) >> DTLB_ENTRY_MT_ma_SHIFT_V6)
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#define DTLB_ENTRY_MT_ma_SET_VAL(x, mt) \
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(((x) & ~DTLB_ENTRY_MT_ma_V6) | \
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(((probe_entry_t)(mt) << DTLB_ENTRY_MT_ma_SHIFT_V6) & \
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DTLB_ENTRY_MT_ma_V6))
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static inline probe_entry_t
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covert_uni_dtlb_flags_to_dtlb_val_v6(const uni_dtlb_t uni_flags)
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{
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probe_entry_t dtlb_flags = 0;
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if (uni_flags & UNI_PAGE_WRITE)
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dtlb_flags |= (DTLB_ENTRY_WR_exc_V6);
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if (uni_flags & UNI_PAGE_PRIV)
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dtlb_flags |= (DTLB_ENTRY_PV_or_U_S_V6);
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if (uni_flags & UNI_PAGE_VALID)
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dtlb_flags |= (DTLB_ENTRY_VVA_V6);
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if (uni_flags & UNI_PAGE_PROTECT)
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dtlb_flags |= (DTLB_ENTRY_INT_PR_V6);
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if (uni_flags & UNI_PAGE_GLOBAL)
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dtlb_flags |= (DTLB_ENTRY_G_V6);
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if (uni_flags & UNI_PAGE_DIRTY)
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dtlb_flags |= (DTLB_ENTRY_D_V6);
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if (uni_flags & UNI_PAGE_NWA)
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dtlb_flags |= (DTLB_ENTRY_NWA_V6);
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if (uni_flags & UNI_PAGE_MEM_TYPE)
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dtlb_flags |= (DTLB_ENTRY_MT_exc_V6);
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if (uni_flags & UNI_PAGE_NON_EX)
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dtlb_flags |= (DTLB_ENTRY_NON_EX_V6);
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if (uni_flags & UNI_PAGE_PFN)
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dtlb_flags |= (DTLB_ENTRY_PHA_V6);
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if (uni_flags & UNI_PAGE_MEM_TYPE_MA)
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dtlb_flags |= (DTLB_ENTRY_MT_ma_V6);
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if (uni_flags & UNI_PAGE_WRITE_INT)
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dtlb_flags |= (DTLB_ENTRY_WR_int_V6);
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if (uni_flags & UNI_PAGE_INTL_RD)
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dtlb_flags |= (DTLB_ENTRY_INTL_RD_V6);
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if (uni_flags & UNI_PAGE_INTL_WR)
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dtlb_flags |= (DTLB_ENTRY_INTL_WR_V6);
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if (uni_flags & UNI_DTLB_EP_RES)
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dtlb_flags |= (DTLB_EP_RES_V6);
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if (uni_flags & UNI_DTLB_PH_ADDR_AP_RES)
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dtlb_flags |= (PH_ADDR_AP_RES_V6);
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if (uni_flags & UNI_DTLB_ERROR_MASK)
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dtlb_flags |= (DTLB_ENTRY_ERROR_MASK_V6);
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if (uni_flags & UNI_DTLB_MISS_LEVEL)
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dtlb_flags |= (DTLB_ENTRY_MISS_LEVEL_MASK_V6);
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if (uni_flags & UNI_DTLB_SUCCESSFUL)
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dtlb_flags |= (DTLB_ENTRY_PROBE_SUCCESSFUL_V6);
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if (uni_flags & UNI_DTLB_RES_BITS)
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dtlb_flags |= (DTLB_ENTRY_RES_BITS_V6);
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BUILD_BUG_ON(dtlb_flags == 0);
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return dtlb_flags;
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}
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static inline probe_entry_t
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fill_dtlb_val_v6_flags(const uni_dtlb_t uni_flags)
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{
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return covert_uni_dtlb_flags_to_dtlb_val_v6(uni_flags);
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}
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static inline probe_entry_t
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get_dtlb_val_v6_flags(probe_entry_t dtlb_val, const uni_dtlb_t uni_flags)
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{
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return dtlb_val & covert_uni_dtlb_flags_to_dtlb_val_v6(uni_flags);
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}
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static inline bool
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test_dtlb_val_v6_flags(probe_entry_t dtlb_val, const uni_dtlb_t uni_flags)
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{
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return get_dtlb_val_v6_flags(dtlb_val, uni_flags) != 0;
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}
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static inline probe_entry_t
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set_dtlb_val_v6_flags(probe_entry_t dtlb_val, const uni_dtlb_t uni_flags)
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{
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return dtlb_val | covert_uni_dtlb_flags_to_dtlb_val_v6(uni_flags);
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}
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static inline probe_entry_t
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clear_dtlb_val_v6_flags(probe_entry_t dtlb_val, const uni_dtlb_t uni_flags)
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{
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return dtlb_val & ~covert_uni_dtlb_flags_to_dtlb_val_v6(uni_flags);
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}
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#endif /* ! __ASSEMBLY__ */
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#endif /* ! _ASM_E2K_MMU_REGS_TYPES_V6_H */
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