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pmap.h revision 1.19 
      1 /*	$NetBSD: pmap.h,v 1.19 2020/03/11 13:30:31 thorpej Exp $	*/
      2 /*-
      3  * Copyright (c) 2010, 2011 The NetBSD Foundation, Inc.
      4  * All rights reserved.
      5  *
      6  * This code is derived from software contributed to The NetBSD Foundation
      7  * by Raytheon BBN Technologies Corp and Defense Advanced Research Projects
      8  * Agency and which was developed by Matt Thomas of 3am Software Foundry.
      9  *
     10  * This material is based upon work supported by the Defense Advanced Research
     11  * Projects Agency and Space and Naval Warfare Systems Center, Pacific, under
     12  * Contract No. N66001-09-C-2073.
     13  * Approved for Public Release, Distribution Unlimited
     14  *
     15  * Redistribution and use in source and binary forms, with or without
     16  * modification, are permitted provided that the following conditions
     17  * are met:
     18  * 1. Redistributions of source code must retain the above copyright
     19  *    notice, this list of conditions and the following disclaimer.
     20  * 2. Redistributions in binary form must reproduce the above copyright
     21  *    notice, this list of conditions and the following disclaimer in the
     22  *    documentation and/or other materials provided with the distribution.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     25  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     26  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     27  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     28  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     29  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     30  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     31  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     32  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     33  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     34  * POSSIBILITY OF SUCH DAMAGE.
     35  */
     36 #ifndef _POWERPC_BOOKE_PMAP_H_
     37 #define _POWERPC_BOOKE_PMAP_H_
     38 
     39 #ifdef _LOCORE
     40 #error use assym.h instead
     41 #endif
     42 
     43 #if defined(_MODULE)
     44 #error this file should not be included by loadable kernel modules
     45 #endif
     46 
     47 #ifdef _KERNEL_OPT
     48 #include "opt_pmap.h"
     49 #endif
     50 
     51 #include <sys/cpu.h>
     52 #include <sys/kcore.h>
     53 #include <uvm/uvm_page.h>
     54 #include <uvm/uvm_physseg.h>
     55 #ifdef __PMAP_PRIVATE
     56 #include <powerpc/booke/cpuvar.h>
     57 #endif
     58 
     59 #define	PMAP_NEED_PROCWR
     60 
     61 #include <uvm/pmap/vmpagemd.h>
     62 
     63 #include <powerpc/booke/pte.h>
     64 
     65 #define	NBSEG		(NBPG*NPTEPG)
     66 #define	SEGSHIFT	(PGSHIFT + PGSHIFT - 2)
     67 #define SEGOFSET	((1 << SEGSHIFT) - 1)
     68 #define PMAP_SEGTABSIZE	(1 << (32 - SEGSHIFT))
     69 #define	NPTEPG		(NBPG >> 2)
     70 
     71 #define	KERNEL_PID	0
     72 
     73 #define	PMAP_TLB_NUM_PIDS		256
     74 #define	PMAP_TLB_MAX			1
     75 #define	PMAP_INVALID_SEGTAB_ADDRESS	((pmap_segtab_t *)0xfeeddead)
     76 #define	PMAP_TLB_FLUSH_ASID_ON_RESET	false
     77 
     78 #define	pmap_phys_address(x)		(x)
     79 
     80 void	pmap_procwr(struct proc *, vaddr_t, size_t);
     81 #define	PMAP_NEED_PROCWR
     82 
     83 #ifdef __PMAP_PRIVATE
     84 struct vm_page *
     85 	pmap_md_alloc_poolpage(int flags);
     86 vaddr_t	pmap_md_map_poolpage(paddr_t, vsize_t);
     87 void	pmap_md_unmap_poolpage(vaddr_t, vsize_t);
     88 bool	pmap_md_direct_mapped_vaddr_p(vaddr_t);
     89 bool	pmap_md_io_vaddr_p(vaddr_t);
     90 paddr_t	pmap_md_direct_mapped_vaddr_to_paddr(vaddr_t);
     91 vaddr_t	pmap_md_direct_map_paddr(paddr_t);
     92 void	pmap_md_init(void);
     93 
     94 bool	pmap_md_tlb_check_entry(void *, vaddr_t, tlb_asid_t, pt_entry_t);
     95 
     96 #ifdef MULTIPROCESSOR
     97 #define	PMAP_NEED_TLB_MISS_LOCK
     98 #endif	/* MULTIPROCESSOR */
     99 
    100 #ifdef PMAP_MINIMALTLB
    101 vaddr_t	pmap_kvptefill(vaddr_t, vaddr_t, pt_entry_t);
    102 #endif
    103 #endif
    104 
    105 void	pmap_md_page_syncicache(struct vm_page *, const kcpuset_t *);
    106 vaddr_t	pmap_bootstrap(vaddr_t, vaddr_t, phys_ram_seg_t *, size_t);
    107 bool	pmap_extract(struct pmap *, vaddr_t, paddr_t *);
    108 
    109 static __inline paddr_t vtophys(vaddr_t);
    110 
    111 static __inline paddr_t
    112 vtophys(vaddr_t va)
    113 {
    114 	paddr_t pa;
    115 
    116 	if (pmap_extract(pmap_kernel(), va, &pa))
    117 		return pa;
    118 	KASSERT(0);
    119 	return (paddr_t) -1;
    120 }
    121 
    122 #ifdef __PMAP_PRIVATE
    123 /*
    124  * Virtual Cache Alias helper routines.  Not a problem for Booke CPUs.
    125  */
    126 static __inline bool
    127 pmap_md_vca_add(struct vm_page *pg, vaddr_t va, pt_entry_t *nptep)
    128 {
    129 	return false;
    130 }
    131 
    132 static __inline void
    133 pmap_md_vca_remove(struct vm_page *pg, vaddr_t va, bool dirty)
    134 {
    135 
    136 }
    137 
    138 static __inline void
    139 pmap_md_vca_clean(struct vm_page *pg, vaddr_t va, int op)
    140 {
    141 }
    142 #endif
    143 
    144 #ifdef __PMAP_PRIVATE
    145 static __inline size_t
    146 pmap_md_tlb_asid_max(void)
    147 {
    148 	return PMAP_TLB_NUM_PIDS - 1;
    149 }
    150 
    151 struct vm_physseg;
    152 static __inline bool
    153 pmap_md_ok_to_steal_p(const uvm_physseg_t bank, size_t npgs)
    154 {
    155 	return true;
    156 }
    157 #endif
    158 
    159 #define	POOL_VTOPHYS(va)	((paddr_t)(vaddr_t)(va))
    160 #define	POOL_PHYSTOV(pa)	((vaddr_t)(paddr_t)(pa))
    161 
    162 #include <uvm/pmap/pmap.h>
    163 
    164 #endif /* !_POWERPC_BOOKE_PMAP_H_ */
    165