/* $NetBSD: mmu.c,v 1.18 2008/04/28 20:23:35 martin 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 <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mmu.c,v 1.18 2008/04/28 20:23:35 martin Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sh3/mmu.h>
#include <sh3/mmu_sh3.h>
#include <sh3/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)
{
uint32_t r;
#ifdef SH3
if (CPU_IS_SH3) {
aprint_normal("cpu0: 4-way set-associative 128 TLB entries\n");
r = _reg_read_4(SH3_MMUCR);
aprint_normal("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;
aprint_normal("cpu0: full-associative"
" 4 ITLB, 64 UTLB entries\n");
r = _reg_read_4(SH4_MMUCR);
urb = (r & SH4_MMUCR_URB_MASK) >> SH4_MMUCR_URB_SHIFT;
aprint_normal("cpu0: %s virtual storage mode,"
" SQ access: kernel%s,"
" wired %d\n",
r & SH3_MMUCR_SV ? "single" : "multiple",
r & SH4_MMUCR_SQMD ? "" : "/user",
urb ? 64 - urb : 0);
}
#endif
}
void
sh_tlb_set_asid(int asid)
{
_reg_write_4(SH_(PTEH), asid);
}