1065b85674
These quirks are intended for optimizing CPU performance, not for applying errata workarounds. Nobody can expect that CPU with unfixed errata is stable enough to execute the kernel until quirks are applied. MFC after: 3 weeks
194 lines
6.6 KiB
C
194 lines
6.6 KiB
C
/*-
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* Copyright 2014 Svatopluk Kraus <onwahe@gmail.com>
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* Copyright 2014 Michal Meloun <meloun@miracle.cz>
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* Copyright (c) 1991 Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department and William Jolitz of UUNET Technologies Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The ARM version of this file was more or less based on the i386 version,
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* which has the following provenance...
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*
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* Derived from hp300 version by Mike Hibler, this version by William
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* Jolitz uses a recursive map [a pde points to the page directory] to
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* map the page tables using the pagetables themselves. This is done to
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* reduce the impact on kernel virtual memory for lots of sparse address
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* space, and to reduce the cost of memory to each process.
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*
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* from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90
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* from: @(#)pmap.h 7.4 (Berkeley) 5/12/91
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* from: FreeBSD: src/sys/i386/include/pmap.h,v 1.70 2000/11/30
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_PMAP_V6_H_
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#define _MACHINE_PMAP_V6_H_
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#include <sys/queue.h>
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#include <sys/_cpuset.h>
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#include <sys/_lock.h>
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#include <sys/_mutex.h>
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typedef uint32_t pt1_entry_t; /* L1 table entry */
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typedef uint32_t pt2_entry_t; /* L2 table entry */
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typedef uint32_t ttb_entry_t; /* TTB entry */
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#ifdef _KERNEL
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#if 0
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#define PMAP_PTE_NOCACHE // Use uncached page tables
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#endif
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/*
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* (1) During pmap bootstrap, physical pages for L2 page tables are
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* allocated in advance which are used for KVA continuous mapping
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* starting from KERNBASE. This makes things more simple.
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* (2) During vm subsystem initialization, only vm subsystem itself can
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* allocate physical memory safely. As pmap_map() is called during
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* this initialization, we must be prepared for that and have some
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* preallocated physical pages for L2 page tables.
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*
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* Note that some more pages for L2 page tables are preallocated too
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* for mappings laying above VM_MAX_KERNEL_ADDRESS.
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*/
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#ifndef NKPT2PG
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/*
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* The optimal way is to define this in board configuration as
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* definition here must be safe enough. It means really big.
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*
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* 1 GB KVA <=> 256 kernel L2 page table pages
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*
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* From real platforms:
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* 1 GB physical memory <=> 10 pages is enough
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* 2 GB physical memory <=> 21 pages is enough
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*/
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#define NKPT2PG 32
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#endif
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#endif /* _KERNEL */
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/*
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* Pmap stuff
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*/
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struct pv_entry;
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struct pv_chunk;
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struct md_page {
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TAILQ_HEAD(,pv_entry) pv_list;
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uint16_t pt2_wirecount[4];
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vm_memattr_t pat_mode;
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};
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struct pmap {
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struct mtx pm_mtx;
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pt1_entry_t *pm_pt1; /* KVA of pt1 */
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pt2_entry_t *pm_pt2tab; /* KVA of pt2 pages table */
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TAILQ_HEAD(,pv_chunk) pm_pvchunk; /* list of mappings in pmap */
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cpuset_t pm_active; /* active on cpus */
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struct pmap_statistics pm_stats; /* pmap statictics */
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LIST_ENTRY(pmap) pm_list; /* List of all pmaps */
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};
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typedef struct pmap *pmap_t;
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#ifdef _KERNEL
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extern struct pmap kernel_pmap_store;
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#define kernel_pmap (&kernel_pmap_store)
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#define PMAP_LOCK(pmap) mtx_lock(&(pmap)->pm_mtx)
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#define PMAP_LOCK_ASSERT(pmap, type) \
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mtx_assert(&(pmap)->pm_mtx, (type))
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#define PMAP_LOCK_DESTROY(pmap) mtx_destroy(&(pmap)->pm_mtx)
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#define PMAP_LOCK_INIT(pmap) mtx_init(&(pmap)->pm_mtx, "pmap", \
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NULL, MTX_DEF | MTX_DUPOK)
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#define PMAP_LOCKED(pmap) mtx_owned(&(pmap)->pm_mtx)
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#define PMAP_MTX(pmap) (&(pmap)->pm_mtx)
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#define PMAP_TRYLOCK(pmap) mtx_trylock(&(pmap)->pm_mtx)
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#define PMAP_UNLOCK(pmap) mtx_unlock(&(pmap)->pm_mtx)
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#endif
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/*
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* For each vm_page_t, there is a list of all currently valid virtual
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* mappings of that page. An entry is a pv_entry_t, the list is pv_list.
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*/
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typedef struct pv_entry {
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vm_offset_t pv_va; /* virtual address for mapping */
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TAILQ_ENTRY(pv_entry) pv_next;
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} *pv_entry_t;
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/*
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* pv_entries are allocated in chunks per-process. This avoids the
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* need to track per-pmap assignments.
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*/
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#define _NPCM 11
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#define _NPCPV 336
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struct pv_chunk {
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pmap_t pc_pmap;
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TAILQ_ENTRY(pv_chunk) pc_list;
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uint32_t pc_map[_NPCM]; /* bitmap; 1 = free */
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TAILQ_ENTRY(pv_chunk) pc_lru;
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struct pv_entry pc_pventry[_NPCPV];
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};
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#ifdef _KERNEL
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extern ttb_entry_t pmap_kern_ttb; /* TTB for kernel pmap */
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#define pmap_page_get_memattr(m) ((m)->md.pat_mode)
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/*
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* Only the following functions or macros may be used before pmap_bootstrap()
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* is called: pmap_kenter(), pmap_kextract(), pmap_kremove(), vtophys(), and
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* vtopte2().
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*/
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void pmap_bootstrap(vm_offset_t);
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void pmap_kenter(vm_offset_t, vm_paddr_t);
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void pmap_kremove(vm_offset_t);
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boolean_t pmap_page_is_mapped(vm_page_t);
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void pmap_tlb_flush(pmap_t, vm_offset_t);
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void pmap_tlb_flush_range(pmap_t, vm_offset_t, vm_size_t);
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vm_paddr_t pmap_dump_kextract(vm_offset_t, pt2_entry_t *);
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int pmap_fault(pmap_t, vm_offset_t, uint32_t, int, bool);
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void pmap_set_tex(void);
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/*
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* Pre-bootstrap epoch functions set.
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*/
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void pmap_bootstrap_prepare(vm_paddr_t);
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vm_paddr_t pmap_preboot_get_pages(u_int);
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void pmap_preboot_map_pages(vm_paddr_t, vm_offset_t, u_int);
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vm_offset_t pmap_preboot_reserve_pages(u_int);
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vm_offset_t pmap_preboot_get_vpages(u_int);
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void pmap_preboot_map_attr(vm_paddr_t, vm_offset_t, vm_size_t, vm_prot_t,
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vm_memattr_t);
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void pmap_remap_vm_attr(vm_memattr_t old_attr, vm_memattr_t new_attr);
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#endif /* _KERNEL */
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#endif /* !_MACHINE_PMAP_V6_H_ */
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