Annotation of sys/arch/luna88k/luna88k/m8820x.c, Revision 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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