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      1 /*	$NetBSD: pmap_devmap.h,v 1.2 2024/11/25 22:03:44 skrll Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2022 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Nick Hudson
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 
     33 #ifndef	_UVM_PMAP_DEVMAP_H_
     34 #define	_UVM_PMAP_DEVMAP_H_
     35 
     36 #ifdef _KERNEL
     37 
     38 typedef struct pmap_devmap {
     39 	vaddr_t		pd_va;		/* virtual address */
     40 	paddr_t		pd_pa;		/* physical address */
     41 	psize_t		pd_size;	/* size of region */
     42 	vm_prot_t	pd_prot;	/* protection code */
     43 	u_int		pd_flags;	/* flags for pmap_kenter_{pa,range} */
     44 } pmap_devmap_t;
     45 
     46 
     47 bool pmap_devmap_bootstrapped_p(void);
     48 void pmap_devmap_register(const struct pmap_devmap *);
     49 void pmap_devmap_bootstrap(vaddr_t, const struct pmap_devmap *);
     50 vaddr_t pmap_devmap_root(void);
     51 const struct pmap_devmap *pmap_devmap_find_pa(paddr_t, psize_t);
     52 const struct pmap_devmap *pmap_devmap_find_va(vaddr_t, vsize_t);
     53 
     54 #define	DEVMAP_ENTRY_FLAGS(va, pa, sz, fl)			\
     55 {								\
     56 	.pd_va = DEVMAP_ALIGN(va),				\
     57 	.pd_pa = DEVMAP_ALIGN(pa),				\
     58 	.pd_size = DEVMAP_SIZE(sz),				\
     59 	.pd_prot = VM_PROT_READ | VM_PROT_WRITE,		\
     60 	.pd_flags = (fl),					\
     61 }
     62 
     63 #define	DEVMAP_ENTRY(va, pa, sz)				\
     64 	DEVMAP_ENTRY_FLAGS(va, pa, sz, DEVMAP_FLAGS)
     65 
     66 #define	DEVMAP_ENTRY_END	{ 0 }
     67 
     68 #endif /* _KERNEL */
     69 
     70 #endif	/* _UVM_PMAP_DEVMAP_H_ */
     71