File: [local] / sys / arch / sh / sh / mmu.c (download)
Revision 1.1, Tue Mar 4 16:08:59 2008 UTC (16 years, 2 months ago) by nbrk
Branch point for: MAIN
Initial revision
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/* $OpenBSD: mmu.c,v 1.2 2007/02/28 19:37:55 deraadt 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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 <sys/param.h>
#include <sys/systm.h>
#include <sh/mmu.h>
#include <sh/mmu_sh3.h>
#include <sh/mmu_sh4.h>
#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 <sh3/mmu.h>.
*/
#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) {
printf("cpu0: fully-associative 4 ITLB, 64 UTLB entries\n");
r = _reg_read_4(SH4_MMUCR);
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",
(r & SH4_MMUCR_URB_MASK) >> SH4_MMUCR_URB_SHIFT);
}
#endif
#endif /* DEBUG */
}
void
sh_tlb_set_asid(int asid)
{
_reg_write_4(SH_(PTEH), asid);
}