/* $OpenBSD: mmu.c,v 1.4 2010/06/02 05:35:17 jasper Exp $ */ /* $NetBSD: mmu.c,v 1.15 2006/02/12 02:30:55 uwe Exp $ */ /*- * Copyright (c) 2002 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by UCHIYAMA Yasushi. * * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ #include #include #include #include #include #if defined(SH3) && defined(SH4) void (*__sh_mmu_start)(void); void (*__sh_tlb_invalidate_addr)(int, vaddr_t); void (*__sh_tlb_invalidate_asid)(int); void (*__sh_tlb_invalidate_all)(void); void (*__sh_tlb_update)(int, vaddr_t, uint32_t); #endif /* SH3 && SH4 */ void sh_mmu_init(void) { /* * Assign function hooks but only if both SH3 and SH4 are defined. * They are called directly otherwise. See . */ #if defined(SH3) && defined(SH4) if (CPU_IS_SH3) { __sh_mmu_start = sh3_mmu_start; __sh_tlb_invalidate_addr = sh3_tlb_invalidate_addr; __sh_tlb_invalidate_asid = sh3_tlb_invalidate_asid; __sh_tlb_invalidate_all = sh3_tlb_invalidate_all; __sh_tlb_update = sh3_tlb_update; } else if (CPU_IS_SH4) { __sh_mmu_start = sh4_mmu_start; __sh_tlb_invalidate_addr = sh4_tlb_invalidate_addr; __sh_tlb_invalidate_asid = sh4_tlb_invalidate_asid; __sh_tlb_invalidate_all = sh4_tlb_invalidate_all; __sh_tlb_update = sh4_tlb_update; } #endif /* SH3 && SH4 */ } void sh_mmu_information(void) { #ifdef DEBUG uint32_t r; #ifdef SH3 if (CPU_IS_SH3) { printf("cpu0: 4-way set-associative 128 TLB entries\n"); r = _reg_read_4(SH3_MMUCR); printf("cpu0: %s mode, %s virtual storage mode\n", r & SH3_MMUCR_IX ? "ASID+VPN" : "VPN", r & SH3_MMUCR_SV ? "single" : "multiple"); } #endif #ifdef SH4 if (CPU_IS_SH4) { unsigned int urb; printf("cpu0: fully-associative 4 ITLB, 64 UTLB entries\n"); r = _reg_read_4(SH4_MMUCR); urb = (r & SH4_MMUCR_URB_MASK) >> SH4_MMUCR_URB_SHIFT; printf("cpu0: %s virtual storage mode, SQ access: kernel%s, ", r & SH3_MMUCR_SV ? "single" : "multiple", r & SH4_MMUCR_SQMD ? "" : "/user"); printf("wired %d\n", urb ? 64 - urb : 0); } #endif #endif /* DEBUG */ } void sh_tlb_set_asid(int asid) { _reg_write_4(SH_(PTEH), asid); }