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NetBSD/sys/arch/m68k/include/pmap_motorola.h

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/* $NetBSD: pmap_motorola.h,v 1.34 2011/10/29 18:26:19 tsutsui Exp $ */
/*
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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.
*
* @(#)pmap.h 8.1 (Berkeley) 6/10/93
*/
/*
* Copyright (c) 1987 Carnegie-Mellon University
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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 the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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.
*
* @(#)pmap.h 8.1 (Berkeley) 6/10/93
*/
#ifndef _M68K_PMAP_MOTOROLA_H_
#define _M68K_PMAP_MOTOROLA_H_
#ifdef _KERNEL_OPT
#include "opt_m68k_arch.h"
#endif
#include <machine/cpu.h>
#include <machine/pte.h>
/*
* Pmap stuff
*/
struct pmap {
pt_entry_t *pm_ptab; /* KVA of page table */
st_entry_t *pm_stab; /* KVA of segment table */
u_int pm_stfree; /* 040: free lev2 blocks */
st_entry_t *pm_stpa; /* 040: ST phys addr */
uint16_t pm_sref; /* segment table ref count */
u_int pm_count; /* pmap reference count */
struct pmap_statistics pm_stats; /* pmap statistics */
int pm_ptpages; /* more stats: PT pages */
};
/*
* MMU specific segment values
*
* We are using following segment layout in m68k pmap_motorola.c:
* 68020/030 4KB/page: l1,l2,page == 10,10,12 (%tc = 0x82c0aa00)
* 68020/030 8KB/page: l1,l2,page == 8,11,13 (%tc = 0x82d08b00)
* 68040/060 4KB/page: l1,l2,l3,page == 7,7,6,12 (%tc = 0x8000)
* 68040/060 8KB/page: l1,l2,l3,page == 7,7,5,13 (%tc = 0xc000)
*
* 68020/030 l2 size is chosen per NPTEPG, a number of page table entries
* per page, to use one whole page for PTEs per one segment table entry,
* and maybe also because 68020 HP MMU machines use simlar structures.
*
* 68040/060 layout is defined by hardware design and not configurable,
* as defined in <m68k/pte_motorola.h>.
*
* Even on 68040/060, we still appropriate 2-level ste-pte pmap structures
* for 68020/030 (derived from 4.4BSD/hp300) to handle 040's 3-level MMU.
* TIA_SIZE and TIB_SIZE are used to represent such pmap structures and
* they are also refered on 040/060.
*
* NBSEG and SEGOFSET are used to check l2 STE of the specified VA,
* so they have different values between 020/030 and 040/060.
*/
/* 8KB / 4KB */
#define TIB_SHIFT (PG_SHIFT - 2) /* 11 / 10 */
#define TIB_SIZE (1U << TIB_SHIFT) /* 2048 / 1024 */
#define TIA_SHIFT (32 - TIB_SHIFT - PG_SHIFT) /* 8 / 10 */
#define TIA_SIZE (1U << TIA_SHIFT) /* 256 / 1024 */
#define SEGSHIFT (TIB_SHIFT + PG_SHIFT) /* 24 / 22 */
#define NBSEG30 (1U << SEGSHIFT)
#define NBSEG40 (1U << SG4_SHIFT2)
#if ( defined(M68020) || defined(M68030)) && \
(!defined(M68040) && !defined(M68060))
#define NBSEG NBSEG30
#elif ( defined(M68040) || defined(M68060)) && \
(!defined(M68020) && !defined(M68030))
#define NBSEG NBSEG40
#else
#define NBSEG ((mmutype == MMU_68040) ? NBSEG40 : NBSEG30)
#endif
#define SEGOFSET (NBSEG - 1) /* byte offset into segment */
#define m68k_round_seg(x) ((((vaddr_t)(x)) + SEGOFSET) & ~SEGOFSET)
#define m68k_trunc_seg(x) ((vaddr_t)(x) & ~SEGOFSET)
#define m68k_seg_offset(x) ((vaddr_t)(x) & SEGOFSET)
/*
* On the 040, we keep track of which level 2 blocks are already in use
* with the pm_stfree mask. Bits are arranged from LSB (block 0) to MSB
* (block 31). For convenience, the level 1 table is considered to be
* block 0.
*
* MAX[KU]L2SIZE control how many pages of level 2 descriptors are allowed
* for the kernel and users.
* 16 or 8 implies only the initial "segment table" page is used,
* i.e. it means PAGE_SIZE / (SG4_LEV1SIZE * sizeof(st_entry_t)).
* WARNING: don't change MAXUL2SIZE unless you can allocate
* physically contiguous pages for the ST in pmap_motorola.c!
*/
#define MAXKL2SIZE 32
#if PAGE_SIZE == 8192 /* NBPG / (SG4_LEV1SIZE * sizeof(st_entry_t)) */
#define MAXUL2SIZE 16
#else
#define MAXUL2SIZE 8
#endif
#define l2tobm(n) (1U << (n))
#define bmtol2(n) (ffs(n) - 1)
/*
* Macros for speed
*/
#define PMAP_ACTIVATE(pmap, loadhw) \
{ \
if ((loadhw)) \
loadustp(m68k_btop((paddr_t)(pmap)->pm_stpa)); \
}
/*
* For each struct vm_page, there is a list of all currently valid virtual
* mappings of that page. An entry is a pv_entry, the list is pv_table.
*/
struct pv_entry {
struct pv_entry *pv_next; /* next pv_entry */
struct pmap *pv_pmap; /* pmap where mapping lies */
vaddr_t pv_va; /* virtual address for mapping */
st_entry_t *pv_ptste; /* non-zero if VA maps a PT page */
struct pmap *pv_ptpmap; /* if pv_ptste, pmap for PT page */
};
#define active_pmap(pm) \
((pm) == pmap_kernel() || (pm) == curproc->p_vmspace->vm_map.pmap)
#define active_user_pmap(pm) \
(curproc && \
(pm) != pmap_kernel() && (pm) == curproc->p_vmspace->vm_map.pmap)
extern struct pv_header *pv_table; /* array of entries, one per page */
#define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
#define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count)
#define pmap_update(pmap) /* nothing (yet) */
static __inline void
pmap_remove_all(struct pmap *pmap)
{
/* Nothing. */
}
extern paddr_t Sysseg_pa;
extern st_entry_t *Sysseg;
extern pt_entry_t *Sysmap, *Sysptmap;
#define SYSMAP_VA VM_MAX_KERNEL_ADDRESS
extern vsize_t Sysptsize;
extern vsize_t mem_size;
extern vaddr_t virtual_avail, virtual_end;
extern u_int protection_codes[];
#if defined(M68040) || defined(M68060)
extern u_int protostfree;
#endif
#ifdef CACHE_HAVE_VAC
extern u_int pmap_aliasmask;
#endif
extern char *vmmap; /* map for mem, dumps, etc. */
extern void *CADDR1, *CADDR2;
extern void *msgbufaddr;
/* for lwp0 uarea initialization after MMU enabled */
extern vaddr_t lwp0uarea;
void pmap_bootstrap_finalize(void);
vaddr_t pmap_map(vaddr_t, paddr_t, paddr_t, int);
void pmap_procwr(struct proc *, vaddr_t, size_t);
#define PMAP_NEED_PROCWR
#ifdef CACHE_HAVE_VAC
void pmap_prefer(vaddr_t, vaddr_t *);
#define PMAP_PREFER(foff, vap, sz, td) pmap_prefer((foff), (vap))
#endif
void _pmap_set_page_cacheable(struct pmap *, vaddr_t);
void _pmap_set_page_cacheinhibit(struct pmap *, vaddr_t);
int _pmap_page_is_cacheable(struct pmap *, vaddr_t);
#endif /* !_M68K_PMAP_MOTOROLA_H_ */
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