sh_mmu.cpp revision 1.1.2.2
1 1.1.2.2 bouyer /* $NetBSD: sh_mmu.cpp,v 1.1.2.2 2001/02/11 19:10:13 bouyer Exp $ */ 2 1.1.2.2 bouyer 3 1.1.2.2 bouyer /*- 4 1.1.2.2 bouyer * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 1.1.2.2 bouyer * All rights reserved. 6 1.1.2.2 bouyer * 7 1.1.2.2 bouyer * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.2 bouyer * by UCHIYAMA Yasushi. 9 1.1.2.2 bouyer * 10 1.1.2.2 bouyer * Redistribution and use in source and binary forms, with or without 11 1.1.2.2 bouyer * modification, are permitted provided that the following conditions 12 1.1.2.2 bouyer * are met: 13 1.1.2.2 bouyer * 1. Redistributions of source code must retain the above copyright 14 1.1.2.2 bouyer * notice, this list of conditions and the following disclaimer. 15 1.1.2.2 bouyer * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.2 bouyer * notice, this list of conditions and the following disclaimer in the 17 1.1.2.2 bouyer * documentation and/or other materials provided with the distribution. 18 1.1.2.2 bouyer * 3. All advertising materials mentioning features or use of this software 19 1.1.2.2 bouyer * must display the following acknowledgement: 20 1.1.2.2 bouyer * This product includes software developed by the NetBSD 21 1.1.2.2 bouyer * Foundation, Inc. and its contributors. 22 1.1.2.2 bouyer * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.1.2.2 bouyer * contributors may be used to endorse or promote products derived 24 1.1.2.2 bouyer * from this software without specific prior written permission. 25 1.1.2.2 bouyer * 26 1.1.2.2 bouyer * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.1.2.2 bouyer * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.1.2.2 bouyer * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.1.2.2 bouyer * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.1.2.2 bouyer * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.1.2.2 bouyer * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.1.2.2 bouyer * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.1.2.2 bouyer * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.1.2.2 bouyer * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.1.2.2 bouyer * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.1.2.2 bouyer * POSSIBILITY OF SUCH DAMAGE. 37 1.1.2.2 bouyer */ 38 1.1.2.2 bouyer 39 1.1.2.2 bouyer #include <sh3/sh_arch.h> 40 1.1.2.2 bouyer #include <sh3/sh_mmu.h> 41 1.1.2.2 bouyer 42 1.1.2.2 bouyer BOOL 43 1.1.2.2 bouyer MemoryManager_SHMMU::init(void) 44 1.1.2.2 bouyer { 45 1.1.2.2 bouyer _kmode = SetKMode(1); 46 1.1.2.2 bouyer 47 1.1.2.2 bouyer _asid = VOLATILE_REF(MMUPTEH) & MMUPTEH_ASID_MASK; 48 1.1.2.2 bouyer DPRINTF((TEXT("ASID = %d\n"), _asid)); 49 1.1.2.2 bouyer 50 1.1.2.2 bouyer return TRUE; 51 1.1.2.2 bouyer } 52 1.1.2.2 bouyer 53 1.1.2.2 bouyer MemoryManager_SHMMU::~MemoryManager_SHMMU(void) 54 1.1.2.2 bouyer { 55 1.1.2.2 bouyer SetKMode(_kmode); 56 1.1.2.2 bouyer } 57 1.1.2.2 bouyer 58 1.1.2.2 bouyer // get physical address from memory mapped TLB. 59 1.1.2.2 bouyer paddr_t 60 1.1.2.2 bouyer MemoryManager_SHMMU::searchPage(vaddr_t vaddr) 61 1.1.2.2 bouyer { 62 1.1.2.2 bouyer u_int32_t vpn, idx, s, dum, aae, dae, entry_idx; 63 1.1.2.2 bouyer paddr_t paddr = ~0; 64 1.1.2.2 bouyer int way; 65 1.1.2.2 bouyer 66 1.1.2.2 bouyer vpn = vaddr & PAGE_MASK; 67 1.1.2.2 bouyer // Windows CE uses VPN-only index-mode. 68 1.1.2.2 bouyer idx = vaddr & MMUAA_VPN_MASK; 69 1.1.2.2 bouyer 70 1.1.2.2 bouyer // to avoid another TLB access, disable external interrupt. 71 1.1.2.2 bouyer s = suspendIntr(); 72 1.1.2.2 bouyer 73 1.1.2.2 bouyer do { 74 1.1.2.2 bouyer // load target address page to TLB 75 1.1.2.2 bouyer dum = VOLATILE_REF(vaddr); 76 1.1.2.2 bouyer VOLATILE_REF(vaddr) = dum; 77 1.1.2.2 bouyer 78 1.1.2.2 bouyer for (way = 0; way < MMU_WAY; way++) { 79 1.1.2.2 bouyer entry_idx = idx | (way << MMUAA_WAY_SHIFT); 80 1.1.2.2 bouyer // inquire MMU address array. 81 1.1.2.2 bouyer aae = VOLATILE_REF(MMUAA | entry_idx); 82 1.1.2.2 bouyer 83 1.1.2.2 bouyer if (!(aae & MMUAA_D_VALID) || 84 1.1.2.2 bouyer ((aae & MMUAA_D_ASID_MASK) != _asid) || 85 1.1.2.2 bouyer (((aae | idx) & PAGE_MASK) != vpn)) 86 1.1.2.2 bouyer continue; 87 1.1.2.2 bouyer 88 1.1.2.2 bouyer // entry found. 89 1.1.2.2 bouyer // inquire MMU data array to get its physical address. 90 1.1.2.2 bouyer dae = VOLATILE_REF(MMUDA | entry_idx); 91 1.1.2.2 bouyer paddr = (dae & PAGE_MASK) | (vaddr & ~PAGE_MASK); 92 1.1.2.2 bouyer break; 93 1.1.2.2 bouyer } 94 1.1.2.2 bouyer } while (paddr == ~0); 95 1.1.2.2 bouyer 96 1.1.2.2 bouyer resumeIntr(s); 97 1.1.2.2 bouyer 98 1.1.2.2 bouyer return paddr; 99 1.1.2.2 bouyer } 100 1.1.2.2 bouyer 101
Indexes created Fri Sep 26 20:09:58 GMT 2025