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freebsd-skq/sys/arm/include/pmap-v6.h
Ian Lepore 84233ddb80 New pmap code for armv6. Disabled by default, option ARM_NEW_PMAP enables it. 
This is pretty much a complete rewrite based on the existing i386 code.  The
patches have been circulating for a couple years and have been looked at by
plenty of people, but I'm not putting anybody on the hook as having reviewed
this in any formal sense except myself.

After this has gotten wider testing from the user community, ARM_NEW_PMAP
will become the default and various dregs of the old pmap code will be
removed.

Submitted by:	Svatopluk Kraus <onwahe@gmail.com>,
	  	Michal Meloun <meloun@miracle.cz>
2015-03-26 21:13:53 +00:00

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/*-
* Copyright 2014 Svatopluk Kraus <onwahe@gmail.com>
* Copyright 2014 Michal Meloun <meloun@miracle.cz>
* Copyright (c) 1991 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 and William Jolitz of UUNET Technologies Inc.
*
* 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.
*
* 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.
*
* The ARM version of this file was more or less based on the i386 version,
* which has the following provenance...
*
* Derived from hp300 version by Mike Hibler, this version by William
* Jolitz uses a recursive map [a pde points to the page directory] to
* map the page tables using the pagetables themselves. This is done to
* reduce the impact on kernel virtual memory for lots of sparse address
* space, and to reduce the cost of memory to each process.
*
* from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90
* from: @(#)pmap.h 7.4 (Berkeley) 5/12/91
* from: FreeBSD: src/sys/i386/include/pmap.h,v 1.70 2000/11/30
*
* $FreeBSD$
*/
#ifndef _MACHINE_PMAP_H_
#define _MACHINE_PMAP_H_
#include <sys/queue.h>
#include <sys/_cpuset.h>
#include <sys/_lock.h>
#include <sys/_mutex.h>
typedef uint32_t pt1_entry_t; /* L1 table entry */
typedef uint32_t pt2_entry_t; /* L2 table entry */
typedef uint32_t ttb_entry_t; /* TTB entry */
#ifdef _KERNEL
#if 0
#define PMAP_PTE_NOCACHE // Use uncached page tables
#endif
/*
* (1) During pmap bootstrap, physical pages for L2 page tables are
* allocated in advance which are used for KVA continuous mapping
* starting from KERNBASE. This makes things more simple.
* (2) During vm subsystem initialization, only vm subsystem itself can
* allocate physical memory safely. As pmap_map() is called during
* this initialization, we must be prepared for that and have some
* preallocated physical pages for L2 page tables.
*
* Note that some more pages for L2 page tables are preallocated too
* for mappings laying above VM_MAX_KERNEL_ADDRESS.
*/
#ifndef NKPT2PG
/*
* The optimal way is to define this in board configuration as
* definition here must be safe enough. It means really big.
*
* 1 GB KVA <=> 256 kernel L2 page table pages
*
* From real platforms:
* 1 GB physical memory <=> 10 pages is enough
* 2 GB physical memory <=> 21 pages is enough
*/
#define NKPT2PG 32
#endif
extern vm_paddr_t phys_avail[];
extern vm_paddr_t dump_avail[];
extern char *_tmppt; /* poor name! */
extern vm_offset_t virtual_avail;
extern vm_offset_t virtual_end;
/*
* Pmap stuff
*/
/*
* This structure is used to hold a virtual<->physical address
* association and is used mostly by bootstrap code
*/
struct pv_addr {
SLIST_ENTRY(pv_addr) pv_list;
vm_offset_t pv_va;
vm_paddr_t pv_pa;
};
#endif
struct pv_entry;
struct pv_chunk;
struct md_page {
TAILQ_HEAD(,pv_entry) pv_list;
uint16_t pt2_wirecount[4];
int pat_mode;
};
struct pmap {
struct mtx pm_mtx;
pt1_entry_t *pm_pt1; /* KVA of pt1 */
pt2_entry_t *pm_pt2tab; /* KVA of pt2 pages table */
TAILQ_HEAD(,pv_chunk) pm_pvchunk; /* list of mappings in pmap */
cpuset_t pm_active; /* active on cpus */
struct pmap_statistics pm_stats; /* pmap statictics */
LIST_ENTRY(pmap) pm_list; /* List of all pmaps */
};
typedef struct pmap *pmap_t;
#ifdef _KERNEL
extern struct pmap kernel_pmap_store;
#define kernel_pmap (&kernel_pmap_store)
#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", \
NULL, MTX_DEF | MTX_DUPOK)
#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)
#endif
/*
* For each vm_page_t, there is a list of all currently valid virtual
* mappings of that page. An entry is a pv_entry_t, the list is pv_list.
*/
typedef struct pv_entry {
vm_offset_t pv_va; /* virtual address for mapping */
TAILQ_ENTRY(pv_entry) pv_next;
} *pv_entry_t;
/*
* pv_entries are allocated in chunks per-process. This avoids the
* need to track per-pmap assignments.
*/
#define _NPCM 11
#define _NPCPV 336
struct pv_chunk {
pmap_t pc_pmap;
TAILQ_ENTRY(pv_chunk) pc_list;
uint32_t pc_map[_NPCM]; /* bitmap; 1 = free */
TAILQ_ENTRY(pv_chunk) pc_lru;
struct pv_entry pc_pventry[_NPCPV];
};
#ifdef _KERNEL
struct pcb;
extern ttb_entry_t pmap_kern_ttb; /* TTB for kernel pmap */
#define pmap_page_get_memattr(m) ((vm_memattr_t)(m)->md.pat_mode)
#define pmap_page_is_write_mapped(m) (((m)->aflags & PGA_WRITEABLE) != 0)
/*
* Only the following functions or macros may be used before pmap_bootstrap()
* is called: pmap_kenter(), pmap_kextract(), pmap_kremove(), vtophys(), and
* vtopte2().
*/
void pmap_bootstrap(vm_offset_t );
void pmap_kenter(vm_offset_t , vm_paddr_t );
void *pmap_kenter_temporary(vm_paddr_t , int );
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, int);
boolean_t pmap_page_is_mapped(vm_page_t );
void pmap_page_set_memattr(vm_page_t , vm_memattr_t );
void pmap_unmapdev(vm_offset_t, vm_size_t);
void pmap_kenter_device(vm_offset_t , vm_paddr_t );
void pmap_set_pcb_pagedir(pmap_t , struct pcb *);
void pmap_lazyfix_action(void);
void pmap_tlb_flush(pmap_t , vm_offset_t );
void pmap_tlb_flush_range(pmap_t , vm_offset_t , vm_size_t );
void pmap_tlb_flush_ng(pmap_t );
void pmap_dcache_wb_range(vm_paddr_t , vm_size_t , vm_memattr_t );
vm_paddr_t pmap_kextract(vm_offset_t );
int pmap_fault(pmap_t , vm_offset_t , uint32_t , int , int );
#define vtophys(va) pmap_kextract((vm_offset_t)(va))
void pmap_set_tex(void);
void reinit_mmu(ttb_entry_t ttb, u_int aux_clr, u_int aux_set);
/*
* Pre-bootstrap epoch functions set.
*/
void pmap_bootstrap_prepare(vm_paddr_t );
vm_paddr_t pmap_preboot_get_pages(u_int );
void pmap_preboot_map_pages(vm_paddr_t , vm_offset_t , u_int );
vm_offset_t pmap_preboot_reserve_pages(u_int );
vm_offset_t pmap_preboot_get_vpages(u_int );
void pmap_preboot_map_attr(vm_paddr_t , vm_offset_t , vm_size_t ,
int , int );
static __inline void
pmap_map_chunk(vm_offset_t l1pt, vm_offset_t va, vm_offset_t pa,
vm_size_t size, int prot, int cache)
{
pmap_preboot_map_attr(pa, va, size, prot, cache);
}
/*
* This structure is used by machine-dependent code to describe
* static mappings of devices, created at bootstrap time.
*/
struct pmap_devmap {
vm_offset_t pd_va; /* virtual address */
vm_paddr_t pd_pa; /* physical address */
vm_size_t pd_size; /* size of region */
vm_prot_t pd_prot; /* protection code */
int pd_cache; /* cache attributes */
};
void pmap_devmap_bootstrap(const struct pmap_devmap *);
#endif /* _KERNEL */
// ----------------- TO BE DELETED ---------------------------------------------
#include <machine/pte-v6.h>
#ifdef _KERNEL
/*
* sys/arm/arm/elf_trampoline.c
* sys/arm/arm/genassym.c
* sys/arm/arm/machdep.c
* sys/arm/arm/mp_machdep.c
* sys/arm/arm/locore.S
* sys/arm/arm/pmap.c
* sys/arm/arm/swtch.S
* sys/arm/at91/at91_machdep.c
* sys/arm/cavium/cns11xx/econa_machdep.c
* sys/arm/s3c2xx0/s3c24x0_machdep.c
* sys/arm/xscale/ixp425/avila_machdep.c
* sys/arm/xscale/i8134x/crb_machdep.c
* sys/arm/xscale/i80321/ep80219_machdep.c
* sys/arm/xscale/i80321/iq31244_machdep.c
* sys/arm/xscale/pxa/pxa_machdep.c
*/
#define PMAP_DOMAIN_KERNEL 0 /* The kernel uses domain #0 */
/*
* sys/arm/arm/busdma_machdep-v6.c
*/
int pmap_dmap_iscurrent(pmap_t pmap);
/*
* sys/arm/arm/cpufunc.c
*/
void pmap_pte_init_mmu_v6(void);
void vector_page_setprot(int);
/*
* sys/arm/arm/db_interface.c
* sys/arm/arm/machdep.c
* sys/arm/arm/minidump_machdep.c
* sys/arm/arm/pmap.c
*/
#define pmap_kernel() kernel_pmap
/*
* sys/arm/arm/bus_space_generic.c (just comment)
* sys/arm/arm/devmap.c
* sys/arm/arm/pmap.c (just comment)
* sys/arm/at91/at91_machdep.c
* sys/arm/cavium/cns11xx/econa_machdep.c
* sys/arm/freescale/imx/imx6_machdep.c (just comment)
* sys/arm/mv/orion/db88f5xxx.c
* sys/arm/mv/mv_localbus.c
* sys/arm/mv/mv_machdep.c
* sys/arm/mv/mv_pci.c
* sys/arm/s3c2xx0/s3c24x0_machdep.c
* sys/arm/versatile/versatile_machdep.c
* sys/arm/xscale/ixp425/avila_machdep.c
* sys/arm/xscale/i8134x/crb_machdep.c
* sys/arm/xscale/i80321/ep80219_machdep.c
* sys/arm/xscale/i80321/iq31244_machdep.c
* sys/arm/xscale/pxa/pxa_machdep.c
*/
#define PTE_DEVICE PTE2_ATTR_DEVICE
#endif /* _KERNEL */
// -----------------------------------------------------------------------------
#endif /* !_MACHINE_PMAP_H_ */
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