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freebsd-dev/sys/powerpc/include/pmap.h
Justin Hibbits be01018809 powerpc64/mmu: Use a SLIST for the PVO delete list, instead of a RB_TREE 
Summary:
Although it's convenient to reuse the pvo_plist for deletion, RB_TREE
insertion and removal is not free, and can result in a lot of extra work
to rebalance the tree.  Instead, use a SLIST as a LIFO delete queue,
which gives us almost free insertion, deletion, and traversal.

Reviewed by:	luporl
Differential Revision: https://reviews.freebsd.org/D21061
2019-08-01 03:55:58 +00:00

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/*-
* SPDX-License-Identifier: BSD-3-Clause AND BSD-4-Clause
*
* Copyright (C) 2006 Semihalf, Marian Balakowicz <m8@semihalf.com>
* All rights reserved.
*
* Adapted for Freescale's e500 core CPUs.
*
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* $FreeBSD$
*/
/*-
* 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.
*
* from: $NetBSD: pmap.h,v 1.17 2000/03/30 16:18:24 jdolecek Exp $
*/
#ifndef _MACHINE_PMAP_H_
#define _MACHINE_PMAP_H_
#include <sys/queue.h>
#include <sys/tree.h>
#include <sys/_cpuset.h>
#include <sys/_lock.h>
#include <sys/_mutex.h>
#include <machine/sr.h>
#include <machine/pte.h>
#include <machine/slb.h>
#include <machine/tlb.h>
struct pmap;
typedef struct pmap *pmap_t;
#if !defined(NPMAPS)
#define NPMAPS 32768
#endif /* !defined(NPMAPS) */
struct slbtnode;
struct pvo_entry {
LIST_ENTRY(pvo_entry) pvo_vlink; /* Link to common virt page */
#ifndef __powerpc64__
LIST_ENTRY(pvo_entry) pvo_olink; /* Link to overflow entry */
#endif
union {
RB_ENTRY(pvo_entry) pvo_plink; /* Link to pmap entries */
SLIST_ENTRY(pvo_entry) pvo_dlink; /* Link to delete enty */
};
struct {
#ifndef __powerpc64__
/* 32-bit fields */
pte_t pte;
#endif
/* 64-bit fields */
uintptr_t slot;
vm_paddr_t pa;
vm_prot_t prot;
} pvo_pte;
pmap_t pvo_pmap; /* Owning pmap */
vm_offset_t pvo_vaddr; /* VA of entry */
uint64_t pvo_vpn; /* Virtual page number */
};
LIST_HEAD(pvo_head, pvo_entry);
SLIST_HEAD(pvo_dlist, pvo_entry);
RB_HEAD(pvo_tree, pvo_entry);
int pvo_vaddr_compare(struct pvo_entry *, struct pvo_entry *);
RB_PROTOTYPE(pvo_tree, pvo_entry, pvo_plink, pvo_vaddr_compare);
/* Used by 32-bit PMAP */
#define PVO_PTEGIDX_MASK 0x007UL /* which PTEG slot */
#define PVO_PTEGIDX_VALID 0x008UL /* slot is valid */
/* Used by 64-bit PMAP */
#define PVO_HID 0x008UL /* PVO entry in alternate hash*/
/* Used by both */
#define PVO_WIRED 0x010UL /* PVO entry is wired */
#define PVO_MANAGED 0x020UL /* PVO entry is managed */
#define PVO_BOOTSTRAP 0x080UL /* PVO entry allocated during
bootstrap */
#define PVO_DEAD 0x100UL /* waiting to be deleted */
#define PVO_LARGE 0x200UL /* large page */
#define PVO_VADDR(pvo) ((pvo)->pvo_vaddr & ~ADDR_POFF)
#define PVO_PTEGIDX_GET(pvo) ((pvo)->pvo_vaddr & PVO_PTEGIDX_MASK)
#define PVO_PTEGIDX_ISSET(pvo) ((pvo)->pvo_vaddr & PVO_PTEGIDX_VALID)
#define PVO_PTEGIDX_CLR(pvo) \
((void)((pvo)->pvo_vaddr &= ~(PVO_PTEGIDX_VALID|PVO_PTEGIDX_MASK)))
#define PVO_PTEGIDX_SET(pvo, i) \
((void)((pvo)->pvo_vaddr |= (i)|PVO_PTEGIDX_VALID))
#define PVO_VSID(pvo) ((pvo)->pvo_vpn >> 16)
struct pmap {
struct pmap_statistics pm_stats;
struct mtx pm_mtx;
cpuset_t pm_active;
union {
#ifdef AIM
struct {
#ifdef __powerpc64__
struct slbtnode *pm_slb_tree_root;
struct slb **pm_slb;
int pm_slb_len;
#else
register_t pm_sr[16];
#endif
struct pmap *pmap_phys;
struct pvo_tree pmap_pvo;
};
#endif
#ifdef BOOKE
struct {
/* TID to identify this pmap entries in TLB */
tlbtid_t pm_tid[MAXCPU];
#ifdef __powerpc64__
/*
* Page table directory,
* array of pointers to page directories.
*/
pte_t **pm_pp2d[PP2D_NENTRIES];
/* List of allocated pdir bufs (pdir kva regions). */
TAILQ_HEAD(, ptbl_buf) pm_pdir_list;
#else
/*
* Page table directory,
* array of pointers to page tables.
*/
pte_t *pm_pdir[PDIR_NENTRIES];
#endif
/* List of allocated ptbl bufs (ptbl kva regions). */
TAILQ_HEAD(, ptbl_buf) pm_ptbl_list;
};
#endif
};
};
struct pv_entry {
pmap_t pv_pmap;
vm_offset_t pv_va;
TAILQ_ENTRY(pv_entry) pv_link;
};
typedef struct pv_entry *pv_entry_t;
struct md_page {
union {
struct {
volatile int32_t mdpg_attrs;
vm_memattr_t mdpg_cache_attrs;
struct pvo_head mdpg_pvoh;
};
struct {
TAILQ_HEAD(, pv_entry) pv_list;
int pv_tracked;
};
};
};
#ifdef AIM
#define pmap_page_get_memattr(m) ((m)->md.mdpg_cache_attrs)
#define pmap_page_is_mapped(m) (!LIST_EMPTY(&(m)->md.mdpg_pvoh))
#else
#define pmap_page_get_memattr(m) VM_MEMATTR_DEFAULT
#define pmap_page_is_mapped(m) (!TAILQ_EMPTY(&(m)->md.pv_list))
#endif
/*
* Return the VSID corresponding to a given virtual address.
* If no VSID is currently defined, it will allocate one, and add
* it to a free slot if available.
*
* NB: The PMAP MUST be locked already.
*/
uint64_t va_to_vsid(pmap_t pm, vm_offset_t va);
/* Lock-free, non-allocating lookup routines */
uint64_t kernel_va_to_slbv(vm_offset_t va);
struct slb *user_va_to_slb_entry(pmap_t pm, vm_offset_t va);
uint64_t allocate_user_vsid(pmap_t pm, uint64_t esid, int large);
void free_vsid(pmap_t pm, uint64_t esid, int large);
void slb_insert_user(pmap_t pm, struct slb *slb);
void slb_insert_kernel(uint64_t slbe, uint64_t slbv);
struct slbtnode *slb_alloc_tree(void);
void slb_free_tree(pmap_t pm);
struct slb **slb_alloc_user_cache(void);
void slb_free_user_cache(struct slb **);
extern struct pmap kernel_pmap_store;
#define kernel_pmap (&kernel_pmap_store)
#ifdef _KERNEL
#define PMAP_LOCK(pmap) mtx_lock(&(pmap)->pm_mtx)
#define PMAP_LOCK_ASSERT(pmap, type) \
mtx_assert(&(pmap)->pm_mtx, (type))
#define PMAP_LOCK_DESTROY(pmap) mtx_destroy(&(pmap)->pm_mtx)
#define PMAP_LOCK_INIT(pmap) mtx_init(&(pmap)->pm_mtx, \
(pmap == kernel_pmap) ? "kernelpmap" : \
"pmap", NULL, MTX_DEF)
#define PMAP_LOCKED(pmap) mtx_owned(&(pmap)->pm_mtx)
#define PMAP_MTX(pmap) (&(pmap)->pm_mtx)
#define PMAP_TRYLOCK(pmap) mtx_trylock(&(pmap)->pm_mtx)
#define PMAP_UNLOCK(pmap) mtx_unlock(&(pmap)->pm_mtx)
#define pmap_page_is_write_mapped(m) (((m)->aflags & PGA_WRITEABLE) != 0)
void pmap_bootstrap(vm_offset_t, vm_offset_t);
void pmap_kenter(vm_offset_t va, vm_paddr_t pa);
void pmap_kenter_attr(vm_offset_t va, vm_paddr_t pa, vm_memattr_t);
void pmap_kremove(vm_offset_t);
void *pmap_mapdev(vm_paddr_t, vm_size_t);
void *pmap_mapdev_attr(vm_paddr_t, vm_size_t, vm_memattr_t);
void pmap_unmapdev(vm_offset_t, vm_size_t);
void pmap_page_set_memattr(vm_page_t, vm_memattr_t);
int pmap_change_attr(vm_offset_t, vm_size_t, vm_memattr_t);
int pmap_map_user_ptr(pmap_t pm, volatile const void *uaddr,
void **kaddr, size_t ulen, size_t *klen);
int pmap_decode_kernel_ptr(vm_offset_t addr, int *is_user,
vm_offset_t *decoded_addr);
void pmap_deactivate(struct thread *);
vm_paddr_t pmap_kextract(vm_offset_t);
int pmap_dev_direct_mapped(vm_paddr_t, vm_size_t);
boolean_t pmap_mmu_install(char *name, int prio);
#define vtophys(va) pmap_kextract((vm_offset_t)(va))
#define PHYS_AVAIL_SZ 256 /* Allows up to 16GB Ram on pSeries with
* logical memory block size of 64MB.
* For more Ram increase the lmb or this value.
*/
extern vm_paddr_t phys_avail[PHYS_AVAIL_SZ];
extern vm_offset_t virtual_avail;
extern vm_offset_t virtual_end;
extern vm_offset_t msgbuf_phys;
extern int pmap_bootstrapped;
vm_offset_t pmap_early_io_map(vm_paddr_t pa, vm_size_t size);
void pmap_early_io_unmap(vm_offset_t va, vm_size_t size);
void pmap_track_page(pmap_t pmap, vm_offset_t va);
static inline int
pmap_vmspace_copy(pmap_t dst_pmap __unused, pmap_t src_pmap __unused)
{
return (0);
}
#endif
#endif /* !_MACHINE_PMAP_H_ */
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