Current Path : /sys/i386/bios/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/i386/bios/mca_machdep.c |
/*- * Copyright (c) 1999 Matthew N. Dodd <winter@jurai.net> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/i386/bios/mca_machdep.c 134582 2004-08-31 21:51:51Z mdodd $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> #include <vm/vm.h> #include <vm/vm_param.h> #include <vm/pmap.h> #include <machine/pmap.h> #include <machine/md_var.h> #include <machine/vm86.h> #include <machine/pc/bios.h> #include <machine/cpufunc.h> #include <dev/mca/mca_busreg.h> #include <i386/bios/mca_machdep.h> /* Global MCA bus flag */ int MCA_system = 0; /* System Configuration Block */ struct sys_config { u_int16_t count; u_int8_t model; u_int8_t submodel; u_int8_t bios_rev; u_int8_t feature; #define FEATURE_MCAISA 0x01 /* Machine contains both MCA and ISA bus*/ #define FEATURE_MCABUS 0x02 /* MicroChannel Architecture */ #define FEATURE_EBDA 0x04 /* Extended BIOS data area allocated */ #define FEATURE_WAITEV 0x08 /* Wait for external event is supported */ #define FEATURE_KBDINT 0x10 /* Keyboard intercept called by Int 09h */ #define FEATURE_RTC 0x20 /* Real-time clock present */ #define FEATURE_IC2 0x40 /* Second interrupt chip present */ #define FEATURE_DMA3 0x80 /* DMA channel 3 used by hard disk BIOS */ u_int8_t pad[3]; } __packed; /* Function Prototypes */ static void bios_mcabus_present (void *); SYSINIT(mca_present, SI_SUB_CPU, SI_ORDER_ANY, bios_mcabus_present, NULL); /* Functions */ static void bios_mcabus_present(void * dummy) { struct vm86frame vmf; struct sys_config * scp; vm_offset_t paddr; bzero(&vmf, sizeof(struct vm86frame)); vmf.vmf_ah = 0xc0; if (vm86_intcall(0x15, &vmf)) { if (bootverbose) { printf("BIOS SDT: INT call failed.\n"); } return; } if ((vmf.vmf_ah != 0) && (vmf.vmf_flags & 0x01)) { if (bootverbose) { printf("BIOS SDT: Not supported. Not PS/2?\n"); printf("BIOS SDT: AH 0x%02x, Flags 0x%04x\n", vmf.vmf_ah, vmf.vmf_flags); } return; } paddr = vmf.vmf_es; paddr = (paddr << 4) + vmf.vmf_bx; scp = (struct sys_config *)BIOS_PADDRTOVADDR(paddr); if (bootverbose) { printf("BIOS SDT: model 0x%02x, submodel 0x%02x, bios_rev 0x%02x\n", scp->model, scp->submodel, scp->bios_rev); printf("BIOS SDT: features 0x%b\n", scp->feature, "\20" "\01MCA+ISA" "\02MCA" "\03EBDA" "\04WAITEV" "\05KBDINT" "\06RTC" "\07IC2" "\08DMA3" "\n"); } MCA_system = ((scp->feature & FEATURE_MCABUS) ? 1 : 0); if (MCA_system) printf("MicroChannel Architecture System detected.\n"); return; } int mca_bus_nmi (void) { int slot; int retval = 0; int pos5 = 0; /* Disable motherboard setup */ outb(MCA_MB_SETUP_REG, MCA_MB_SETUP_DIS); /* For each slot */ for (slot = 0; slot < MCA_MAX_SLOTS; slot++) { /* Select the slot */ outb(MCA_ADAP_SETUP_REG, slot | MCA_ADAP_SET); pos5 = inb(MCA_POS_REG(MCA_POS5)); /* If Adapter Check is low */ if ((pos5 & MCA_POS5_CHCK) == 0) { retval++; /* If Adapter Check Status is available */ if ((pos5 & MCA_POS5_CHCK_STAT) == 0) { printf("MCA NMI: slot %d, POS6=0x%02x, POS7=0x%02x\n", slot+1, inb( MCA_POS_REG(MCA_POS6) ), inb( MCA_POS_REG(MCA_POS7) )); } else { printf("MCA NMI: slot %d\n", slot+1); } } /* Disable adapter setup */ outb(MCA_ADAP_SETUP_REG, MCA_ADAP_SETUP_DIS); } return (retval); }