Annotation of sys/arch/luna88k/luna88k/m8820x.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: m8820x.c,v 1.13 2006/10/30 14:32:27 aoyama Exp $ */
2: /*
3: * Copyright (c) 2004, Miodrag Vallat.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: *
14: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17: * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
18: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
20: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
22: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
23: * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24: * POSSIBILITY OF SUCH DAMAGE.
25: */
26: /*
27: * Copyright (c) 2001 Steve Murphree, Jr.
28: * Copyright (c) 1996 Nivas Madhur
29: * All rights reserved.
30: *
31: * Redistribution and use in source and binary forms, with or without
32: * modification, are permitted provided that the following conditions
33: * are met:
34: * 1. Redistributions of source code must retain the above copyright
35: * notice, this list of conditions and the following disclaimer.
36: * 2. Redistributions in binary form must reproduce the above copyright
37: * notice, this list of conditions and the following disclaimer in the
38: * documentation and/or other materials provided with the distribution.
39: * 3. All advertising materials mentioning features or use of this software
40: * must display the following acknowledgement:
41: * This product includes software developed by Nivas Madhur.
42: * 4. The name of the author may not be used to endorse or promote products
43: * derived from this software without specific prior written permission
44: *
45: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
46: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
47: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
48: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
49: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
50: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
51: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
52: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
53: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
54: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
55: *
56: */
57: /*
58: * Mach Operating System
59: * Copyright (c) 1993-1991 Carnegie Mellon University
60: * Copyright (c) 1991 OMRON Corporation
61: * All Rights Reserved.
62: *
63: * Permission to use, copy, modify and distribute this software and its
64: * documentation is hereby granted, provided that both the copyright
65: * notice and this permission notice appear in all copies of the
66: * software, derivative works or modified versions, and any portions
67: * thereof, and that both notices appear in supporting documentation.
68: *
69: * CARNEGIE MELLON AND OMRON ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS IS"
70: * CONDITION. CARNEGIE MELLON AND OMRON DISCLAIM ANY LIABILITY OF ANY KIND
71: * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
72: *
73: * Carnegie Mellon requests users of this software to return to
74: *
75: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
76: * School of Computer Science
77: * Carnegie Mellon University
78: * Pittsburgh PA 15213-3890
79: *
80: * any improvements or extensions that they make and grant Carnegie the
81: * rights to redistribute these changes.
82: */
83:
84: #include <sys/param.h>
85: #include <sys/systm.h>
86:
87: #include <uvm/uvm_extern.h>
88:
89: #include <machine/asm_macro.h>
90: #include <machine/board.h>
91: #include <machine/cmmu.h>
92: #include <machine/cpu.h>
93: #include <machine/m8820x.h>
94:
95: /*
96: * This routine sets up the CPU/CMMU configuration.
97: */
98: void
99: m8820x_setup_board_config()
100: {
101: struct m8820x_cmmu *cmmu;
102: u_int num;
103:
104: m8820x_cmmu[0].cmmu_regs = (void *)CMMU_I0;
105: m8820x_cmmu[1].cmmu_regs = (void *)CMMU_D0;
106: m8820x_cmmu[2].cmmu_regs = (void *)CMMU_I1;
107: m8820x_cmmu[3].cmmu_regs = (void *)CMMU_D1;
108: m8820x_cmmu[4].cmmu_regs = (void *)CMMU_I2;
109: m8820x_cmmu[5].cmmu_regs = (void *)CMMU_D2;
110: m8820x_cmmu[6].cmmu_regs = (void *)CMMU_I3;
111: m8820x_cmmu[7].cmmu_regs = (void *)CMMU_D3;
112:
113: /*
114: * Probe CMMU address to discover which CPU slots are populated.
115: * On the luna88k, badaddr() returns 'good' on unpopulated slots,
116: * so we check the CMMU type value for each CMMU register address.
117: */
118: cmmu = m8820x_cmmu;
119:
120: for (num = 0; num < 8; num++) {
121: volatile unsigned *cr = m8820x_cmmu[num].cmmu_regs;
122: int type;
123:
124: type = CMMU_TYPE(cr[CMMU_IDR]);
125: if (type != M88200_ID && type != M88204_ID)
126: break;
127: }
128:
129: max_cpus = num >> 1;
130: max_cmmus = max_cpus << 1;
131: cmmu_shift = 1; /* fixed 2:1 configuration */
132:
133: /*
134: * Now that we know which CMMUs are there, report every association
135: */
136: for (num = 0; num < max_cpus; num++) {
137: volatile unsigned *cr;
138: int type;
139:
140: cr = m8820x_cmmu[num << cmmu_shift].cmmu_regs;
141:
142: m88k_cpus[num].ci_alive = 1; /* This cpu installed... */
143:
144: type = CMMU_TYPE(cr[CMMU_IDR]);
145: printf("CPU%d is associated to %d MC8820%c CMMUs\n",
146: num, 1 << cmmu_shift, type == M88204_ID ? '4' : '0');
147: }
148: }
149:
150: /*
151: * Find out the CPU number from accessing CMMU
152: * Better be at splhigh, or even better, with interrupts
153: * disabled.
154: */
155: #define ILLADDRESS 0x3ffffff0 /* any faulty address for luna88k2 */
156:
157: cpuid_t
158: m8820x_cpu_number()
159: {
160: u_int cmmu;
161: u_int i;
162:
163: CMMU_LOCK;
164:
165: for (i = 0; i < 10; i++) {
166: /* clear CMMU P-bus status registers */
167: for (cmmu = 0; cmmu < max_cmmus; cmmu++) {
168: if (CMMU_MODE(cmmu) != INST_CMMU)
169: m8820x_cmmu[cmmu].cmmu_regs[CMMU_PFSR] = 0;
170: }
171:
172: /* access faulting address */
173: badaddr((vaddr_t)ILLADDRESS, 4);
174:
175: /* check which CMMU is reporting the fault */
176: for (cmmu = 0; cmmu < max_cmmus; cmmu++) {
177: if (CMMU_MODE(cmmu) != INST_CMMU &&
178: CMMU_PFSR_FAULT(m8820x_cmmu[cmmu].
179: cmmu_regs[CMMU_PFSR]) != CMMU_PFSR_SUCCESS) {
180: /* clean register, just in case... */
181: m8820x_cmmu[cmmu].cmmu_regs[CMMU_PFSR] = 0;
182: CMMU_UNLOCK;
183: return cmmu >> 1;
184: }
185: }
186: }
187: CMMU_UNLOCK;
188:
189: panic("m8820x_cpu_number: could not determine my cpu number");
190: }
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