sys_machdep.c revision 1.7 
1/*	$NetBSD: sys_machdep.c,v 1.7 2006/07/22 06:34:42 tsutsui Exp $	*/
2
3/*
4 * Copyright (c) 1982, 1986, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 *	@(#)sys_machdep.c	8.2 (Berkeley) 1/13/94
32 */
33
34#include <sys/cdefs.h>
35__KERNEL_RCSID(0, "$NetBSD");
36
37#include "opt_compat_hpux.h"
38
39#include <sys/param.h>
40#include <sys/proc.h>
41#include <sys/mount.h>
42
43#include <uvm/uvm_extern.h>
44
45#include <sys/sa.h>
46#include <sys/syscallargs.h>
47
48#include <machine/cpu.h>
49#include <m68k/cacheops.h>
50
51/* XXX should be in an include file somewhere */
52#define CC_PURGE	1
53#define CC_FLUSH	2
54#define CC_IPURGE	4
55#define CC_EXTPURGE	0x80000000
56/* XXX end should be */
57
58/*
59 * Note that what we do here on 040/060 for BSD is different than for HP-UX.
60 *
61 * In 'pux they either act on a line (len == 16), a page (len == PAGE_SIZE)
62 * or the whole cache (len == anything else).
63 *
64 * In BSD we attempt to be more optimal when acting on "odd" sizes.
65 * For lengths up to 1024 we do all affected lines, up to 2*PAGE_SIZE we
66 * do pages, above that we do the entire cache.
67 */
68/*ARGSUSED1*/
69int
70cachectl1(u_long req, vaddr_t addr, size_t len, struct proc *p)
71{
72	int error = 0;
73
74#if defined(M68040) || defined(M68060)
75	if (mmutype == MMU_68040) {
76		int inc = 0;
77		boolean_t doall = FALSE;
78		paddr_t pa = 0;
79		vaddr_t end = 0;
80#ifdef COMPAT_HPUX
81		extern struct emul emul_hpux;
82
83		if ((p->p_emul == &emul_hpux) &&
84		    len != 16 && len != PAGE_SIZE)
85			doall = 1;
86#endif
87
88		if (addr == 0 ||
89#if defined(M68060)
90		    (cputype == CPU_68040 && req & CC_IPURGE) ||
91#else
92		    (req & CC_IPURGE) ||
93#endif
94		    ((req & ~CC_EXTPURGE) != CC_PURGE && len > 2 * PAGE_SIZE))
95			doall = 1;
96
97		if (!doall) {
98			end = addr + len;
99			if (len <= 1024) {
100				addr = addr & ~0xf;
101				inc = 16;
102			} else {
103				addr = addr & ~PGOFSET;
104				inc = PAGE_SIZE;
105			}
106		}
107		do {
108			/*
109			 * Convert to physical address if needed.
110			 * If translation fails, we perform operation on
111			 * entire cache.
112			 */
113			if (!doall &&
114			    (pa == 0 || m68k_page_offset(addr) == 0)) {
115				if (pmap_extract(p->p_vmspace->vm_map.pmap,
116				    addr, &pa) == FALSE)
117					doall = 1;
118			}
119			switch (req) {
120			case CC_EXTPURGE|CC_IPURGE:
121			case CC_IPURGE:
122				if (doall) {
123					DCFA();
124					ICPA();
125				} else if (inc == 16) {
126					DCFL(pa);
127					ICPL(pa);
128				} else if (inc == PAGE_SIZE) {
129					DCFP(pa);
130					ICPP(pa);
131				}
132				break;
133
134			case CC_EXTPURGE|CC_PURGE:
135			case CC_PURGE:
136				if (doall)
137					DCFA();	/* note: flush not purge */
138				else if (inc == 16)
139					DCPL(pa);
140				else if (inc == PAGE_SIZE)
141					DCPP(pa);
142				break;
143
144			case CC_EXTPURGE|CC_FLUSH:
145			case CC_FLUSH:
146				if (doall)
147					DCFA();
148				else if (inc == 16)
149					DCFL(pa);
150				else if (inc == PAGE_SIZE)
151					DCFP(pa);
152				break;
153
154			default:
155				error = EINVAL;
156				break;
157			}
158			if (doall)
159				break;
160			pa += inc;
161			addr += inc;
162		} while (addr < end);
163		return (error);
164	}
165#endif
166	switch (req) {
167	case CC_EXTPURGE|CC_PURGE:
168	case CC_EXTPURGE|CC_FLUSH:
169#if defined(CACHE_HAVE_PAC)
170		if (ectype == EC_PHYS)
171			PCIA();
172		/* fall into... */
173#endif
174	case CC_PURGE:
175	case CC_FLUSH:
176		DCIU();
177		break;
178	case CC_EXTPURGE|CC_IPURGE:
179#if defined(CACHE_HAVE_PAC)
180		if (ectype == EC_PHYS)
181			PCIA();
182		else
183#endif
184		DCIU();
185		/* fall into... */
186	case CC_IPURGE:
187		ICIA();
188		break;
189	default:
190		error = EINVAL;
191		break;
192	}
193	return error;
194}
195
196int
197sys_sysarch(struct lwp *l, void *v, register_t *retval)
198{
199
200	return ENOSYS;
201}
202
203#if defined(amiga) || defined(x68k)
204
205/*
206 * DMA cache control
207 */
208
209/*ARGSUSED1*/
210int
211dma_cachectl(caddr_t addr, int len)
212{
213#if defined(M68040) || defined(M68060)
214	int inc = 0;
215	int pa = 0;
216	caddr_t end;
217
218	if (mmutype != MMU_68040) {
219		return 0;
220	}
221
222	end = addr + len;
223	if (len <= 1024) {
224		addr = (caddr_t)((vaddr_t)addr & ~0xf);
225		inc = 16;
226	} else {
227		addr = (caddr_t)((vaddr_t)addr & ~PGOFSET);
228		inc = PAGE_SIZE;
229	}
230	do {
231		/*
232		 * Convert to physical address.
233		 */
234		if (pa == 0 || ((vaddr_t)addr & PGOFSET) == 0) {
235			pa = kvtop(addr);
236		}
237		if (inc == 16) {
238			DCFL(pa);
239			ICPL(pa);
240		} else {
241			DCFP(pa);
242			ICPP(pa);
243		}
244		pa += inc;
245		addr += inc;
246	} while (addr < end);
247#endif	/* defined(M68040) || defined(M68060) */
248	return 0;
249}
250#endif	/* defined(amiga) || defined(x68k) */
251