b729364e00
o Eliminate tlb0[] (a s/w copy of TLB0)
- The table contents cannot be maintained reliably in multiple MMU
environments, where asynchronous events (invalidations from other cores)
can change our local TLB0 contents underneath.
- Simplify and optimize TLB flushing: system wide invalidations are
performed using tlbivax instruction (propagates to other cores), for
local MMU invalidations a new optimized routine (assembly) is introduced.
o Improve and simplify TID allocation and management.
- Let each core keep track of its TID allocations.
- Simplify TID recycling, eliminate dead code.
- Drop the now unused powerpc/booke/support.S file.
o Improve page tables management logic.
o Simplify TLB1 manipulation routines.
o Other improvements and polishing.
Obtained from: Freescale, Semihalf
185 lines
6.3 KiB
C
185 lines
6.3 KiB
C
/*-
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* Copyright (C) 2006 Semihalf, Marian Balakowicz <m8@semihalf.com>
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* All rights reserved.
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*
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* Adapted for Freescale's e500 core CPUs.
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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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*-
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* Copyright (C) 1995, 1996 Wolfgang Solfrank.
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* Copyright (C) 1995, 1996 TooLs GmbH.
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* All rights reserved.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* from: $NetBSD: pmap.h,v 1.17 2000/03/30 16:18:24 jdolecek Exp $
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*/
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#ifndef _MACHINE_PMAP_H_
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#define _MACHINE_PMAP_H_
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#include <sys/queue.h>
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#include <sys/_lock.h>
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#include <sys/_mutex.h>
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#include <machine/sr.h>
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#include <machine/pte.h>
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#include <machine/tlb.h>
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#if defined(AIM)
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#if !defined(NPMAPS)
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#define NPMAPS 32768
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#endif /* !defined(NPMAPS) */
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struct pmap {
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struct mtx pm_mtx;
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u_int pm_sr[16];
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u_int pm_active;
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u_int pm_context;
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struct pmap *pmap_phys;
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struct pmap_statistics pm_stats;
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};
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typedef struct pmap *pmap_t;
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struct pvo_entry {
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LIST_ENTRY(pvo_entry) pvo_vlink; /* Link to common virt page */
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LIST_ENTRY(pvo_entry) pvo_olink; /* Link to overflow entry */
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union {
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struct pte pte; /* 32 bit PTE */
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struct lpte lpte; /* 64 bit PTE */
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} pvo_pte;
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pmap_t pvo_pmap; /* Owning pmap */
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vm_offset_t pvo_vaddr; /* VA of entry */
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};
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LIST_HEAD(pvo_head, pvo_entry);
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struct md_page {
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u_int64_t mdpg_attrs;
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struct pvo_head mdpg_pvoh;
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};
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#define pmap_page_is_mapped(m) (!LIST_EMPTY(&(m)->md.mdpg_pvoh))
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#else
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struct pmap {
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struct mtx pm_mtx; /* pmap mutex */
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tlbtid_t pm_tid[MAXCPU]; /* TID to identify this pmap entries in TLB */
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u_int pm_active; /* active on cpus */
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int pm_refs; /* ref count */
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struct pmap_statistics pm_stats; /* pmap statistics */
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/* Page table directory, array of pointers to page tables. */
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pte_t *pm_pdir[PDIR_NENTRIES];
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/* List of allocated ptbl bufs (ptbl kva regions). */
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TAILQ_HEAD(, ptbl_buf) pm_ptbl_list;
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};
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typedef struct pmap *pmap_t;
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struct pv_entry {
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pmap_t pv_pmap;
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vm_offset_t pv_va;
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TAILQ_ENTRY(pv_entry) pv_link;
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};
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typedef struct pv_entry *pv_entry_t;
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struct md_page {
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TAILQ_HEAD(, pv_entry) pv_list;
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};
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#define MEM_REGIONS 8
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#define pmap_page_is_mapped(m) (!TAILQ_EMPTY(&(m)->md.pv_list))
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#endif /* AIM */
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extern struct pmap kernel_pmap_store;
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#define kernel_pmap (&kernel_pmap_store)
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#ifdef _KERNEL
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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)
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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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void pmap_bootstrap(vm_offset_t, vm_offset_t);
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void pmap_kenter(vm_offset_t va, vm_offset_t pa);
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void pmap_kremove(vm_offset_t);
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void *pmap_mapdev(vm_offset_t, vm_size_t);
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boolean_t pmap_page_executable(vm_page_t);
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void pmap_unmapdev(vm_offset_t, vm_size_t);
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void pmap_deactivate(struct thread *);
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vm_offset_t pmap_kextract(vm_offset_t);
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int pmap_dev_direct_mapped(vm_offset_t, vm_size_t);
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boolean_t pmap_mmu_install(char *name, int prio);
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#define vtophys(va) pmap_kextract((vm_offset_t)(va))
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#define PHYS_AVAIL_SZ 128
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extern vm_offset_t phys_avail[PHYS_AVAIL_SZ];
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extern vm_offset_t virtual_avail;
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extern vm_offset_t virtual_end;
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extern vm_offset_t msgbuf_phys;
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extern int pmap_bootstrapped;
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#endif
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#endif /* !_MACHINE_PMAP_H_ */
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