1/*	$NetBSD: mmu.c,v 1.17 2008/03/16 07:16:37 uwe Exp $	*/
2
3/*-
4 * Copyright (c) 2002 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by UCHIYAMA Yasushi.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__KERNEL_RCSID(0, "$NetBSD: mmu.c,v 1.17 2008/03/16 07:16:37 uwe Exp $");
34
35#include <sys/param.h>
36#include <sys/systm.h>
37
38#include <sh3/mmu.h>
39#include <sh3/mmu_sh3.h>
40#include <sh3/mmu_sh4.h>
41
42#if defined(SH3) && defined(SH4)
43void (*__sh_mmu_start)(void);
44void (*__sh_tlb_invalidate_addr)(int, vaddr_t);
45void (*__sh_tlb_invalidate_asid)(int);
46void (*__sh_tlb_invalidate_all)(void);
47void (*__sh_tlb_update)(int, vaddr_t, uint32_t);
48#endif /* SH3 && SH4 */
49
50
51void
52sh_mmu_init(void)
53{
54
55	/*
56	 * Assign function hooks but only if both SH3 and SH4 are defined.
57	 * They are called directly otherwise.  See <sh3/mmu.h>.
58	 */
59#if defined(SH3) && defined(SH4)
60	if (CPU_IS_SH3) {
61		__sh_mmu_start = sh3_mmu_start;
62		__sh_tlb_invalidate_addr = sh3_tlb_invalidate_addr;
63		__sh_tlb_invalidate_asid = sh3_tlb_invalidate_asid;
64		__sh_tlb_invalidate_all = sh3_tlb_invalidate_all;
65		__sh_tlb_update = sh3_tlb_update;
66	}
67	else if (CPU_IS_SH4) {
68		__sh_mmu_start = sh4_mmu_start;
69		__sh_tlb_invalidate_addr = sh4_tlb_invalidate_addr;
70		__sh_tlb_invalidate_asid = sh4_tlb_invalidate_asid;
71		__sh_tlb_invalidate_all = sh4_tlb_invalidate_all;
72		__sh_tlb_update = sh4_tlb_update;
73	}
74#endif /* SH3 && SH4 */
75}
76
77void
78sh_mmu_information(void)
79{
80	uint32_t r;
81#ifdef SH3
82	if (CPU_IS_SH3) {
83		aprint_normal("cpu0: 4-way set-associative 128 TLB entries\n");
84		r = _reg_read_4(SH3_MMUCR);
85		aprint_normal("cpu0: %s mode, %s virtual storage mode\n",
86		    r & SH3_MMUCR_IX ? "ASID+VPN" : "VPN",
87		    r & SH3_MMUCR_SV ? "single" : "multiple");
88	}
89#endif
90#ifdef SH4
91	if (CPU_IS_SH4) {
92		unsigned int urb;
93		aprint_normal("cpu0: full-associative"
94			      " 4 ITLB, 64 UTLB entries\n");
95		r = _reg_read_4(SH4_MMUCR);
96		urb = (r & SH4_MMUCR_URB_MASK) >> SH4_MMUCR_URB_SHIFT;
97		aprint_normal("cpu0: %s virtual storage mode,"
98			      " SQ access: kernel%s,"
99			      " wired %d\n",
100		    r & SH3_MMUCR_SV ? "single" : "multiple",
101		    r & SH4_MMUCR_SQMD ? "" : "/user",
102		    urb ? 64 - urb : 0);
103	}
104#endif
105}
106
107void
108sh_tlb_set_asid(int asid)
109{
110
111	_reg_write_4(SH_(PTEH), asid);
112}
113