This adds the i386 specific support for systems with a MicroChannel

Architecture bus.

Reviewed by: msmith

2 files changed, 192 insertions, 0 deletions

diff --git a/sys/i386/bios/mca_machdep.c b/sys/i386/bios/mca_machdep.c
new file mode 100644
index 0000000..8eaf682
--- /dev/null
+++ b/sys/i386/bios/mca_machdep.c
@@ -0,0 +1,161 @@
+/*-
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#include "mca.h"
+#if NMCA > 0
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <vm/vm.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/isa/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_RESV	0x01	/* Reserved				*/
+#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];
+} __attribute__ ((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 (0);
+	}
+
+	if ((vmf.vmf_ah != 0) && (vmf.vmf_flags != 0)) {
+		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 (0);
+	}
+
+	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"
+			"\01RESV"
+			"\02MCABUS"
+			"\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);
+}
+#endif
diff --git a/sys/i386/bios/mca_machdep.h b/sys/i386/bios/mca_machdep.h
new file mode 100644
index 0000000..c639b5b
--- /dev/null
+++ b/sys/i386/bios/mca_machdep.h
@@ -0,0 +1,31 @@
+/*-
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+extern int	MCA_system;
+
+extern int	mca_bus_nmi		(void);