/*- * Copyright 2014 Svatopluk Kraus * Copyright 2014 Michal Meloun * 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 #include #include #include 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_size_t, vm_paddr_t); void pmap_kremove_device(vm_offset_t, vm_size_t); void pmap_set_pcb_pagedir(pmap_t , struct pcb *); void pmap_tlb_flush(pmap_t , vm_offset_t ); void pmap_tlb_flush_range(pmap_t , vm_offset_t , vm_size_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 , bool); #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 #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/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_ */