/*-
 * SPDX-License-Identifier: BSD-4-Clause
 *
 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
 * Copyright (C) 1995, 1996 TooLs GmbH.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by TooLs GmbH.
 * 4. The name of TooLs GmbH may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *	$NetBSD: pte.h,v 1.2 1998/08/31 14:43:40 tsubai Exp $
 * $FreeBSD$
 */

#ifndef	_MACHINE_PTE_H_
#define	_MACHINE_PTE_H_

#if defined(AIM)

/*
 * Page Table Entries
 */
#ifndef	LOCORE

/* 32-bit PTE */
struct pte {
	u_int32_t pte_hi;
	u_int32_t pte_lo;
};

struct pteg {
	struct	pte pt[8];
};

/* 64-bit (long) PTE */
struct lpte {
	u_int64_t pte_hi;
	u_int64_t pte_lo;
};

struct lpteg {
	struct lpte pt[8];
};

/* Partition table entry */
struct pate {
	u_int64_t pagetab;
	u_int64_t proctab;
};

#endif	/* LOCORE */

/* 32-bit PTE definitions */

/* High word: */
#define	PTE_VALID	0x80000000
#define	PTE_VSID_SHFT	7
#define	PTE_HID		0x00000040
#define	PTE_API		0x0000003f
/* Low word: */
#define	PTE_RPGN	0xfffff000
#define	PTE_REF		0x00000100
#define	PTE_CHG		0x00000080
#define	PTE_WIMG	0x00000078
#define	PTE_W		0x00000040
#define	PTE_I		0x00000020
#define	PTE_M		0x00000010
#define	PTE_G		0x00000008
#define	PTE_PP		0x00000003
#define	PTE_SO		0x00000000	/* Super. Only       (U: XX, S: RW) */
#define PTE_SW		0x00000001	/* Super. Write-Only (U: RO, S: RW) */
#define	PTE_BW		0x00000002	/* Supervisor        (U: RW, S: RW) */
#define	PTE_BR		0x00000003	/* Both Read Only    (U: RO, S: RO) */
#define	PTE_RW		PTE_BW
#define	PTE_RO		PTE_BR

#define	PTE_EXEC	0x00000200	/* pseudo bit in attrs; page is exec */

/* 64-bit PTE definitions */

/* High quadword: */
#define LPTE_VSID_SHIFT		12
#define LPTE_AVPN_MASK		0xFFFFFFFFFFFFFF80ULL
#define LPTE_API		0x0000000000000F80ULL
#define LPTE_SWBITS		0x0000000000000078ULL
#define LPTE_WIRED		0x0000000000000010ULL
#define LPTE_LOCKED		0x0000000000000008ULL
#define LPTE_BIG		0x0000000000000004ULL	/* 4kb/16Mb page */
#define LPTE_HID		0x0000000000000002ULL
#define LPTE_VALID		0x0000000000000001ULL

/* Low quadword: */
#define EXTEND_PTE(x)	UINT64_C(x)	/* make constants 64-bit */
#define	LPTE_RPGN	0xfffffffffffff000ULL
#define	LPTE_REF	EXTEND_PTE( PTE_REF )
#define	LPTE_CHG	EXTEND_PTE( PTE_CHG )
#define	LPTE_WIMG	EXTEND_PTE( PTE_WIMG )
#define	LPTE_W		EXTEND_PTE( PTE_W )
#define	LPTE_I		EXTEND_PTE( PTE_I )
#define	LPTE_M		EXTEND_PTE( PTE_M )
#define	LPTE_G		EXTEND_PTE( PTE_G )
#define	LPTE_NOEXEC	0x0000000000000004ULL
#define	LPTE_PP		EXTEND_PTE( PTE_PP )

#define	LPTE_SO		EXTEND_PTE( PTE_SO )	/* Super. Only */
#define	LPTE_SW		EXTEND_PTE( PTE_SW )	/* Super. Write-Only */
#define	LPTE_BW		EXTEND_PTE( PTE_BW )	/* Supervisor */
#define	LPTE_BR		EXTEND_PTE( PTE_BR )	/* Both Read Only */
#define	LPTE_RW		LPTE_BW
#define	LPTE_RO		LPTE_BR

/* POWER ISA 3.0 Radix Table Definitions */
#define	RPTE_VALID		0x8000000000000000ULL
#define	RPTE_LEAF		0x4000000000000000ULL /* is a PTE: always 1 */
#define	RPTE_SW0		0x2000000000000000ULL
#define	RPTE_RPN_MASK		0x00FFFFFFFFFFF000ULL
#define	RPTE_RPN_SHIFT		12
#define	RPTE_SW1		0x0000000000000800ULL
#define	RPTE_SW2		0x0000000000000400ULL
#define	RPTE_SW3		0x0000000000000200ULL
#define	RPTE_R			0x0000000000000100ULL
#define	RPTE_C			0x0000000000000080ULL

#define	RPTE_ATTR_MASK		0x0000000000000030ULL
#define	RPTE_ATTR_MEM		0x0000000000000000ULL /* PTE M */
#define	RPTE_ATTR_SAO		0x0000000000000010ULL /* PTE WIM */
#define	RPTE_ATTR_GUARDEDIO	0x0000000000000020ULL /* PTE IMG */
#define	RPTE_ATTR_UNGUARDEDIO	0x0000000000000030ULL /* PTE IM */

#define	RPTE_EAA_MASK		0x000000000000000FULL
#define	RPTE_EAA_P		0x0000000000000008ULL /* Supervisor only */
#define	RPTE_EAA_R		0x0000000000000004ULL /* Read allowed */
#define	RPTE_EAA_W		0x0000000000000002ULL /* Write (+read) */
#define	RPTE_EAA_X		0x0000000000000001ULL /* Execute allowed */

#define	RPDE_VALID		RPTE_VALID
#define	RPDE_LEAF		RPTE_LEAF             /* is a PTE: always 0 */
#define	RPDE_NLB_MASK		0x0FFFFFFFFFFFFF00ULL
#define	RPDE_NLB_SHIFT		8
#define	RPDE_NLS_MASK		0x000000000000001FULL


#ifndef	LOCORE
typedef	struct pte pte_t;
typedef	struct lpte lpte_t;
#endif	/* LOCORE */

/*
 * Extract bits from address
 */
#define	ADDR_SR_SHFT	28
#define	ADDR_PIDX	0x0ffff000UL
#define	ADDR_PIDX_SHFT	12
#define	ADDR_API_SHFT	22
#define	ADDR_API_SHFT64	16
#define	ADDR_POFF	0x00000fffUL

/*
 * Bits in DSISR:
 */
#define	DSISR_DIRECT	0x80000000
#define	DSISR_NOTFOUND	0x40000000
#define	DSISR_PROTECT	0x08000000
#define	DSISR_INVRX	0x04000000
#define	DSISR_STORE	0x02000000
#define	DSISR_DABR	0x00400000
#define	DSISR_SEGMENT	0x00200000
#define	DSISR_EAR	0x00100000

/*
 * Bits in SRR1 on ISI:
 */
#define	ISSRR1_NOTFOUND	0x40000000
#define	ISSRR1_DIRECT	0x10000000
#define	ISSRR1_PROTECT	0x08000000
#define	ISSRR1_SEGMENT	0x00200000

#else /* BOOKE */

#include <machine/tlb.h>

#ifdef __powerpc64__

#include <machine/tlb.h>

/*
 * The virtual address is:
 *
 * 4K page size
 *   +-----+-----+-----+-------+-------------+-------------+----------------+
 *   |  -  |p2d#h|  -  | p2d#l |     dir#    |     pte#    | off in 4K page |
 *   +-----+-----+-----+-------+-------------+-------------+----------------+
 *    63 62 61 60 59 40 39   30 29    ^    21 20    ^    12 11             0
 *                                    |             |
 *                                index in 1 page of pointers
 *
 * 1st level - pointers to page table directory (pp2d)
 *
 * pp2d consists of PP2D_NENTRIES entries, each being a pointer to
 * second level entity, i.e. the page table directory (pdir).
 */
#define HARDWARE_WALKER
#define PP2D_H_H		61
#define PP2D_H_L		60
#define PP2D_L_H		39
#define PP2D_L_L		30	/* >30 would work with no page table pool */
#ifndef LOCORE
#define PP2D_SIZE		(1UL << PP2D_L_L)	/* va range mapped by pp2d */
#else
#define PP2D_SIZE		(1 << PP2D_L_L)	/* va range mapped by pp2d */
#endif
#define PP2D_L_SHIFT		PP2D_L_L
#define PP2D_L_NUM		(PP2D_L_H-PP2D_L_L+1)
#define PP2D_L_MASK		((1<<PP2D_L_NUM)-1)
#define PP2D_H_SHIFT		(PP2D_H_L-PP2D_L_NUM)
#define PP2D_H_NUM		(PP2D_H_H-PP2D_H_L+1)
#define PP2D_H_MASK		(((1<<PP2D_H_NUM)-1)<<PP2D_L_NUM)
#define PP2D_IDX(va)		(((va >> PP2D_H_SHIFT) & PP2D_H_MASK) | ((va >> PP2D_L_SHIFT) & PP2D_L_MASK))
#define PP2D_NENTRIES		(1<<(PP2D_L_NUM+PP2D_H_NUM))
#define PP2D_ENTRY_SHIFT	3	/* log2 (sizeof(struct pte_entry **)) */

/*
 * 2nd level - page table directory (pdir)
 *
 * pdir consists of PDIR_NENTRIES entries, each being a pointer to
 * second level entity, i.e. the actual page table (ptbl).
 */
#define PDIR_H			(PP2D_L_L-1)
#define PDIR_L			21
#define PDIR_NUM		(PDIR_H-PDIR_L+1)
#define PDIR_SIZE		(1 << PDIR_L)	/* va range mapped by pdir */
#define PDIR_MASK		((1<<PDIR_NUM)-1)
#define PDIR_SHIFT		PDIR_L
#define PDIR_NENTRIES		(1<<PDIR_NUM)
#define PDIR_IDX(va)		(((va) >> PDIR_SHIFT) & PDIR_MASK)
#define PDIR_ENTRY_SHIFT	3	/* log2 (sizeof(struct pte_entry *)) */
#define PDIR_PAGES		((PDIR_NENTRIES * (1<<PDIR_ENTRY_SHIFT)) / PAGE_SIZE)

/*
 * 3rd level - page table (ptbl)
 *
 * Page table covers PTBL_NENTRIES page table entries. Page
 * table entry (pte) is 64 bit wide and defines mapping
 * for a single page.
 */
#define PTBL_H			(PDIR_L-1)
#define PTBL_L			PAGE_SHIFT
#define PTBL_NUM		(PTBL_H-PTBL_L+1)
#define PTBL_MASK		((1<<PTBL_NUM)-1)
#define PTBL_SHIFT		PTBL_L
#define PTBL_SIZE		PAGE_SIZE	/* va range mapped by ptbl entry */
#define PTBL_NENTRIES		(1<<PTBL_NUM)
#define PTBL_IDX(va)		((va >> PTBL_SHIFT) & PTBL_MASK)
#define PTBL_ENTRY_SHIFT	 3	/* log2 (sizeof (struct pte_entry)) */
#define PTBL_PAGES		((PTBL_NENTRIES * (1<<PTBL_ENTRY_SHIFT)) / PAGE_SIZE)

#define KERNEL_LINEAR_MAX	0xc000000040000000
#else
/*
 * 1st level - page table directory (pdir)
 *
 * pdir consists of 1024 entries, each being a pointer to
 * second level entity, i.e. the actual page table (ptbl).
 */
#define PDIR_SHIFT	22
#define PDIR_SIZE	(1 << PDIR_SHIFT)	/* va range mapped by pdir */
#define PDIR_MASK	(~(PDIR_SIZE - 1))
#define PDIR_NENTRIES	1024			/* number of page tables in pdir */

/* Returns pdir entry number for given va */
#define PDIR_IDX(va)	((va) >> PDIR_SHIFT)

#define PDIR_ENTRY_SHIFT 2	/* entry size is 2^2 = 4 bytes */

/*
 * 2nd level - page table (ptbl)
 *
 * Page table covers 1024 page table entries. Page
 * table entry (pte) is 32 bit wide and defines mapping
 * for a single page.
 */
#define PTBL_SHIFT	PAGE_SHIFT
#define PTBL_SIZE	PAGE_SIZE		/* va range mapped by ptbl entry */
#define PTBL_MASK	((PDIR_SIZE - 1) & ~((1 << PAGE_SHIFT) - 1))
#define PTBL_NENTRIES	1024			/* number of pages mapped by ptbl */

/* Returns ptbl entry number for given va */
#define PTBL_IDX(va)	(((va) & PTBL_MASK) >> PTBL_SHIFT)

/* Size of ptbl in pages, 1024 entries, each sizeof(struct pte_entry). */
#define PTBL_PAGES	2
#define PTBL_ENTRY_SHIFT 3	/* entry size is 2^3 = 8 bytes */

#endif

/*
 * Flags for pte_remove() routine.
 */
#define PTBL_HOLD	0x00000001	/* do not unhold ptbl pages */
#define PTBL_UNHOLD	0x00000002	/* unhold and attempt to free ptbl pages */

#define PTBL_HOLD_FLAG(pmap)	(((pmap) == kernel_pmap) ? PTBL_HOLD : PTBL_UNHOLD)

/*
 * Page Table Entry definitions and macros.
 *
 * RPN need only be 32-bit because Book-E has 36-bit addresses, and the smallest
 * page size is 4k (12-bit mask), so RPN can really fit into 24 bits.
 */
#ifndef	LOCORE
typedef uint64_t pte_t;
#endif

/* RPN mask, TLB0 4K pages */
#define PTE_PA_MASK	PAGE_MASK

#if defined(BOOKE_E500)

/* PTE bits assigned to MAS2, MAS3 flags */
#define	PTE_MAS2_SHIFT	19
#define PTE_W		(MAS2_W << PTE_MAS2_SHIFT)
#define PTE_I		(MAS2_I << PTE_MAS2_SHIFT)
#define PTE_M		(MAS2_M << PTE_MAS2_SHIFT)
#define PTE_G		(MAS2_G << PTE_MAS2_SHIFT)
#define PTE_MAS2_MASK	(MAS2_G | MAS2_M | MAS2_I | MAS2_W)

#define PTE_MAS3_SHIFT	2
#define PTE_UX		(MAS3_UX << PTE_MAS3_SHIFT)
#define PTE_SX		(MAS3_SX << PTE_MAS3_SHIFT)
#define PTE_UW		(MAS3_UW << PTE_MAS3_SHIFT)
#define PTE_SW		(MAS3_SW << PTE_MAS3_SHIFT)
#define PTE_UR		(MAS3_UR << PTE_MAS3_SHIFT)
#define PTE_SR		(MAS3_SR << PTE_MAS3_SHIFT)
#define PTE_MAS3_MASK	((MAS3_UX | MAS3_SX | MAS3_UW	\
			| MAS3_SW | MAS3_UR | MAS3_SR) << PTE_MAS3_SHIFT)

#define	PTE_PS_SHIFT	8
#define	PTE_PS_4KB	(2 << PTE_PS_SHIFT)

#elif defined(BOOKE_PPC4XX)

#define PTE_WL1		TLB_WL1
#define PTE_IL2I	TLB_IL2I
#define PTE_IL2D	TLB_IL2D

#define PTE_W		TLB_W
#define PTE_I		TLB_I
#define PTE_M		TLB_M
#define PTE_G		TLB_G

#define PTE_UX		TLB_UX
#define PTE_SX		TLB_SX
#define PTE_UW		TLB_UW
#define PTE_SW		TLB_SW
#define PTE_UR		TLB_UR
#define PTE_SR		TLB_SR

#endif

/* Other PTE flags */
#define PTE_VALID	0x00000001	/* Valid */
#define PTE_MODIFIED	0x00001000	/* Modified */
#define PTE_WIRED	0x00002000	/* Wired */
#define PTE_MANAGED	0x00000002	/* Managed */
#define PTE_REFERENCED	0x00040000	/* Referenced */

/*
 * Page Table Entry definitions and macros.
 *
 * We use the hardware page table entry format:
 *
 * 63       24 23 19 18 17 14  13 12 11  8  7  6  5  4  3  2  1  0
 * ---------------------------------------------------------------
 * ARPN(12:51) WIMGE  R U0:U3 SW0 C  PSIZE UX SX UW SW UR SR SW1 V
 * ---------------------------------------------------------------
 */

/* PTE fields. */
#define PTE_TSIZE_SHIFT		(63-54)
#define PTE_TSIZE_MASK		0x7
#define PTE_TSIZE_SHIFT_DIRECT	(63-55)
#define PTE_TSIZE_MASK_DIRECT	0xf
#define PTE_PS_DIRECT(ps)	(ps<<PTE_TSIZE_SHIFT_DIRECT)	/* Direct Entry Page Size */
#define PTE_PS(ps)		(ps<<PTE_TSIZE_SHIFT)	/* Page Size */

/* Macro argument must of pte_t type. */
#define PTE_TSIZE(pte)		(int)((*pte >> PTE_TSIZE_SHIFT) & PTE_TSIZE_MASK)
#define PTE_TSIZE_DIRECT(pte)	(int)((*pte >> PTE_TSIZE_SHIFT_DIRECT) & PTE_TSIZE_MASK_DIRECT)

/* Macro argument must of pte_t type. */
#define	PTE_ARPN_SHIFT		12
#define	PTE_FLAGS_MASK		0x00ffffff
#define PTE_RPN_FROM_PA(pa)	(((pa) & ~PAGE_MASK) << PTE_ARPN_SHIFT)
#define PTE_PA(pte)		((vm_paddr_t)(*pte >> PTE_ARPN_SHIFT) & ~PAGE_MASK)
#define PTE_ISVALID(pte)	((*pte) & PTE_VALID)
#define PTE_ISWIRED(pte)	((*pte) & PTE_WIRED)
#define PTE_ISMANAGED(pte)	((*pte) & PTE_MANAGED)
#define PTE_ISMODIFIED(pte)	((*pte) & PTE_MODIFIED)
#define PTE_ISREFERENCED(pte)	((*pte) & PTE_REFERENCED)

#endif /* BOOKE */
#endif /* _MACHINE_PTE_H_ */