1257648Sian/*- 2257648Sian * Copyright (c) 2013 Ian Lepore <ian@freebsd.org> 3257648Sian * All rights reserved. 4257648Sian * 5257648Sian * Redistribution and use in source and binary forms, with or without 6257648Sian * modification, are permitted provided that the following conditions 7257648Sian * are met: 8257648Sian * 1. Redistributions of source code must retain the above copyright 9257648Sian * notice, this list of conditions and the following disclaimer. 10257648Sian * 2. Redistributions in binary form must reproduce the above copyright 11257648Sian * notice, this list of conditions and the following disclaimer in the 12257648Sian * documentation and/or other materials provided with the distribution. 13257648Sian * 14257648Sian * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15257648Sian * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16257648Sian * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17257648Sian * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18257648Sian * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19257648Sian * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20257648Sian * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21257648Sian * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22257648Sian * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23257648Sian * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24257648Sian * SUCH DAMAGE. 25257648Sian * 26257648Sian * $FreeBSD: releng/10.3/sys/arm/include/devmap.h 266086 2014-05-14 20:17:31Z ian $ 27257648Sian */ 28257648Sian 29257648Sian#ifndef _MACHINE_DEVMAP_H_ 30257648Sian#define _MACHINE_DEVMAP_H_ 31257648Sian 32257648Sian/* 33259364Sian * This structure is used by MD code to describe static mappings of devices 34259364Sian * which are established as part of bringing up the MMU early in the boot. 35259364Sian */ 36259364Sianstruct arm_devmap_entry { 37259364Sian vm_offset_t pd_va; /* virtual address */ 38259364Sian vm_paddr_t pd_pa; /* physical address */ 39259364Sian vm_size_t pd_size; /* size of region */ 40259364Sian vm_prot_t pd_prot; /* protection code */ 41259364Sian int pd_cache; /* cache attributes */ 42259364Sian}; 43259364Sian 44259364Sian/* 45259365Sian * Return the lowest KVA address used in any entry in the registered devmap 46259365Sian * table. This works with whatever table is registered, including the internal 47259365Sian * table used by arm_devmap_add_entry() if that routine was used. Platforms can 48259365Sian * implement initarm_lastaddr() by calling this if static device mappings are 49259365Sian * their only use of high KVA space. 50259365Sian */ 51259365Sianvm_offset_t arm_devmap_lastaddr(void); 52259365Sian 53259365Sian/* 54259365Sian * Automatically allocate KVA (from the top of the address space downwards) and 55259365Sian * make static device mapping entries in an internal table. The internal table 56259365Sian * is automatically registered on the first call to this. 57259365Sian */ 58259365Sianvoid arm_devmap_add_entry(vm_paddr_t pa, vm_size_t sz); 59259365Sian 60259365Sian/* 61259364Sian * Register a platform-local table to be bootstrapped by the generic 62259364Sian * initarm() in arm/machdep.c. This is used by newer code that allocates and 63259364Sian * fills in its own local table but does not have its own initarm() routine. 64259364Sian */ 65259364Sianvoid arm_devmap_register_table(const struct arm_devmap_entry * _table); 66259364Sian 67259364Sian/* 68259365Sian * Establish mappings for all the entries in the table. This is called 69259365Sian * automatically from the common initarm() in arm/machdep.c, and also from the 70259365Sian * custom initarm() routines in older code. If the table pointer is NULL, this 71259365Sian * will use the table installed previously by arm_devmap_register_table(). 72259364Sian */ 73259364Sianvoid arm_devmap_bootstrap(vm_offset_t _l1pt, 74259364Sian const struct arm_devmap_entry *_table); 75259364Sian 76259364Sian/* 77259365Sian * Translate between virtual and physical addresses within a region that is 78259365Sian * static-mapped by the devmap code. If the given address range isn't 79257648Sian * static-mapped, then ptov returns NULL and vtop returns DEVMAP_PADDR_NOTFOUND. 80257648Sian * The latter implies that you can't vtop just the last byte of physical address 81257648Sian * space. This is not as limiting as it might sound, because even if a device 82257648Sian * occupies the end of the physical address space, you're only prevented from 83257648Sian * doing vtop for that single byte. If you vtop a size bigger than 1 it works. 84257648Sian */ 85257648Sian#define DEVMAP_PADDR_NOTFOUND ((vm_paddr_t)(-1)) 86257648Sian 87257648Sianvoid * arm_devmap_ptov(vm_paddr_t _pa, vm_size_t _sz); 88257648Sianvm_paddr_t arm_devmap_vtop(void * _va, vm_size_t _sz); 89257648Sian 90266086Sian/* Print the static mapping table; used for bootverbose output. */ 91266086Sianvoid arm_devmap_print_table(void); 92266086Sian 93257648Sian#endif 94