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1.1 nbrk 1: /* $OpenBSD: cachectl.c,v 1.1 2005/08/01 11:54:24 miod Exp $ */
2: /* $NetBSD: sys_machdep.c,v 1.17 1997/05/19 10:15:00 veego Exp $ */
3:
4: /*
5: * Copyright (c) 1982, 1986, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the University nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: *
32: * @(#)sys_machdep.c 8.2 (Berkeley) 1/13/94
33: */
34:
35: #include <sys/param.h>
36: #include <sys/systm.h>
37: #include <sys/proc.h>
38: #include <sys/kernel.h>
39:
40: #include <machine/cpu.h>
41:
42: #include <uvm/uvm_extern.h>
43:
44: /*
45: * Note that what we do here for a 68040 is different than HP-UX.
46: *
47: * In HP-UX they either act on a line (len == 16), a page (len == NBPG)
48: * or the whole cache (len == anything else).
49: *
50: * In BSD we attempt to be more optimal when acting on "odd" sizes.
51: * For lengths up to 1024 we do all affected lines, up to 2 * NBPG we
52: * do pages, above that we do the entire cache.
53: */
54: /*ARGSUSED1*/
55: int
56: cachectl(struct proc *p, int req, vaddr_t addr, int len)
57: {
58: int error = 0;
59:
60: #if defined(M68040) || defined(M68060)
61: if (mmutype <= MMU_68040) {
62: int inc = 0;
63: int doall = 0;
64: paddr_t pa = 0;
65: vaddr_t end = 0;
66: #ifdef COMPAT_HPUX
67: extern struct emul emul_hpux;
68:
69: if ((p->p_emul == &emul_hpux) &&
70: len != 16 && len != NBPG)
71: doall = 1;
72: #endif
73:
74: if (addr == 0 ||
75: ((req & ~CC_EXTPURGE) != CC_PURGE && len > 2*NBPG))
76: doall = 1;
77:
78: if (!doall) {
79: end = addr + len;
80: if (len <= 1024) {
81: addr = addr & ~0xF;
82: inc = 16;
83: } else {
84: addr = addr & ~PGOFSET;
85: inc = NBPG;
86: }
87: }
88: do {
89: /*
90: * Convert to physical address if needed.
91: * If translation fails, we perform operation on
92: * entire cache (XXX is this a rational thing to do?)
93: */
94: if (!doall &&
95: (pa == 0 || ((int)addr & PGOFSET) == 0)) {
96: if (pmap_extract(
97: p->p_vmspace->vm_map.pmap,
98: addr, &pa) == FALSE)
99: doall = 1;
100: }
101: switch (req) {
102: case CC_EXTPURGE|CC_IPURGE:
103: case CC_IPURGE:
104: if (doall) {
105: DCFA();
106: ICPA();
107: } else if (inc == 16) {
108: DCFL(pa);
109: ICPL(pa);
110: } else if (inc == NBPG) {
111: DCFP(pa);
112: ICPP(pa);
113: }
114: break;
115:
116: case CC_EXTPURGE|CC_PURGE:
117: case CC_PURGE:
118: if (doall)
119: DCFA(); /* note: flush not purge */
120: else if (inc == 16)
121: DCPL(pa);
122: else if (inc == NBPG)
123: DCPP(pa);
124: break;
125:
126: case CC_EXTPURGE|CC_FLUSH:
127: case CC_FLUSH:
128: if (doall)
129: DCFA();
130: else if (inc == 16)
131: DCFL(pa);
132: else if (inc == NBPG)
133: DCFP(pa);
134: break;
135:
136: default:
137: error = EINVAL;
138: break;
139: }
140: if (doall)
141: break;
142: pa += inc;
143: addr += inc;
144: } while (addr < end);
145: return (error);
146: }
147: #endif
148: switch (req) {
149: case CC_EXTPURGE|CC_PURGE:
150: case CC_EXTPURGE|CC_FLUSH:
151: #if defined(CACHE_HAVE_PAC)
152: if (ectype == EC_PHYS)
153: PCIA();
154: /* FALLTHROUGH */
155: #endif
156: case CC_PURGE:
157: case CC_FLUSH:
158: DCIU();
159: break;
160: case CC_EXTPURGE|CC_IPURGE:
161: #if defined(CACHE_HAVE_PAC)
162: if (ectype == EC_PHYS)
163: PCIA();
164: else
165: #endif
166: DCIU();
167: /* FALLTHROUGH */
168: case CC_IPURGE:
169: ICIA();
170: break;
171: default:
172: error = EINVAL;
173: break;
174: }
175: return (error);
176: }