init gnumach copy

1 files changed, 392 insertions, 0 deletions

diff --git a/i386/i386at/kd_event.c b/i386/i386at/kd_event.c
new file mode 100644
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--- /dev/null
+++ b/i386/i386at/kd_event.c
@@ -0,0 +1,392 @@
+/*
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/* **********************************************************************
+ File:         kd_event.c
+ Description:  Driver for event interface to keyboard.
+
+ $ Header: $
+
+ Copyright Ing. C. Olivetti & C. S.p.A. 1989.  All rights reserved.
+********************************************************************** */
+/*
+  Copyright 1988, 1989 by Olivetti Advanced Technology Center, Inc.,
+Cupertino, California.
+
+		All Rights Reserved
+
+  Permission to use, copy, modify, and distribute this software and
+its documentation for any purpose and without fee is hereby
+granted, provided that the above copyright notice appears in all
+copies and that both the copyright notice and this permission notice
+appear in supporting documentation, and that the name of Olivetti
+not be used in advertising or publicity pertaining to distribution
+of the software without specific, written prior permission.
+
+  OLIVETTI DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
+IN NO EVENT SHALL OLIVETTI BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
+CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
+NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUR OF OR IN CONNECTION
+WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <mach/boolean.h>
+#include <sys/types.h>
+#include <kern/printf.h>
+#include <string.h>
+
+#include <device/ds_routines.h>
+#include <device/device_types.h>
+#include <device/io_req.h>
+#include <i386/machspl.h>
+#include <i386/pio.h>
+#include <i386at/kd.h>
+#include <i386at/kd_queue.h>
+#ifdef APIC
+# include <i386/apic.h>
+#else
+# include <i386/pic.h>
+#endif
+
+#include "kd_event.h"
+
+/*
+ * Code for /dev/kbd.   The interrupt processing is done in kd.c,
+ * which calls into this module to enqueue scancode events when
+ * the keyboard is in Event mode.
+ */
+
+/*
+ * Note: These globals are protected by raising the interrupt level
+ * via SPLKD.
+ */
+
+kd_event_queue kbd_queue;		/* queue of keyboard events */
+queue_head_t	kbd_read_queue = { &kbd_read_queue, &kbd_read_queue };
+
+static boolean_t initialized = FALSE;
+
+
+/*
+ * kbdinit - set up event queue.
+ */
+
+static void
+kbdinit(void)
+{
+	spl_t s = SPLKD();
+
+	if (!initialized) {
+		kdq_reset(&kbd_queue);
+		initialized = TRUE;
+	}
+	splx(s);
+}
+
+
+/*
+ * kbdopen - Verify that open is read-only and remember process
+ * group leader.
+ */
+
+/*ARGSUSED*/
+int
+kbdopen(dev_t dev, int flags, io_req_t ior)
+{
+	spl_t o_pri = spltty();
+	kdinit();
+	splx(o_pri);
+	kbdinit();
+
+	return(0);
+}
+
+
+/*
+ * kbdclose - Make sure that the kd driver is in Ascii mode and
+ * reset various flags.
+ */
+
+/*ARGSUSED*/
+void
+kbdclose(
+	dev_t 	dev,
+	int 	flags)
+{
+	spl_t s = SPLKD();
+
+	kb_mode = KB_ASCII;
+	kdq_reset(&kbd_queue);
+	splx(s);
+}
+
+
+io_return_t kbdgetstat(
+	dev_t		dev,
+	dev_flavor_t	flavor,
+	dev_status_t	data,		/* pointer to OUT array */
+	mach_msg_type_number_t	*count)		/* OUT */
+{
+	switch (flavor) {
+	    case KDGKBDTYPE:
+		*data = KB_VANILLAKB;
+		*count = 1;
+		break;
+	    case DEV_GET_SIZE:
+		data[DEV_GET_SIZE_DEVICE_SIZE] = 0;
+		data[DEV_GET_SIZE_RECORD_SIZE] = sizeof(kd_event);
+		*count = DEV_GET_SIZE_COUNT;
+		break;
+	    default:
+		return (D_INVALID_OPERATION);
+	}
+	return (D_SUCCESS);
+}
+
+io_return_t kbdsetstat(
+	dev_t		dev,
+	dev_flavor_t	flavor,
+	dev_status_t	data,
+	mach_msg_type_number_t	count)
+{
+	switch (flavor) {
+	    case KDSKBDMODE:
+		kb_mode = *data;
+		/* XXX - what to do about unread events? */
+		/* XXX - should check that 'data' contains an OK valud */
+		break;
+   	   case KDSETLEDS:
+	        if (count != 1)
+	            return (D_INVALID_OPERATION);
+		kd_setleds1 (*data);
+		break;
+	    case K_X_KDB_ENTER:
+		return X_kdb_enter_init((unsigned int *)data, count);
+	    case K_X_KDB_EXIT:
+		return X_kdb_exit_init((unsigned int *)data, count);
+	    default:
+		return (D_INVALID_OPERATION);
+	}
+	return (D_SUCCESS);
+}
+
+
+
+/*
+ * kbdread - dequeue and return any queued events.
+ */
+int
+kbdread(
+	dev_t		dev,
+	io_req_t	ior)
+{
+	int		err, count;
+	spl_t		s;
+
+	/* Check if IO_COUNT is a multiple of the record size. */
+	if (ior->io_count % sizeof(kd_event) != 0)
+	    return D_INVALID_SIZE;
+
+	err = device_read_alloc(ior, (vm_size_t)ior->io_count);
+	if (err != KERN_SUCCESS)
+	    return (err);
+
+	s = SPLKD();
+	if (kdq_empty(&kbd_queue)) {
+	    if (ior->io_mode & D_NOWAIT) {
+		splx(s);
+		return (D_WOULD_BLOCK);
+	    }
+	    ior->io_done = kbd_read_done;
+	    enqueue_tail(&kbd_read_queue, (queue_entry_t) ior);
+	    splx(s);
+	    return (D_IO_QUEUED);
+	}
+	count = 0;
+	while (!kdq_empty(&kbd_queue) && count < ior->io_count) {
+	    kd_event *ev;
+
+	    ev = kdq_get(&kbd_queue);
+	    *(kd_event *)(&ior->io_data[count]) = *ev;
+	    count += sizeof(kd_event);
+	}
+	splx(s);
+	ior->io_residual = ior->io_count - count;
+	return (D_SUCCESS);
+}
+
+boolean_t kbd_read_done(io_req_t ior)
+{
+	int		count;
+	spl_t		s;
+
+	s = SPLKD();
+	if (kdq_empty(&kbd_queue)) {
+	    ior->io_done = kbd_read_done;
+	    enqueue_tail(&kbd_read_queue, (queue_entry_t)ior);
+	    splx(s);
+	    return (FALSE);
+	}
+
+	count = 0;
+	while (!kdq_empty(&kbd_queue) && count < ior->io_count) {
+	    kd_event *ev;
+
+	    ev = kdq_get(&kbd_queue);
+	    *(kd_event *)(&ior->io_data[count]) = *ev;
+	    count += sizeof(kd_event);
+	}
+	splx(s);
+
+	ior->io_residual = ior->io_count - count;
+	ds_read_done(ior);
+
+	return (TRUE);
+}
+
+
+
+/*
+ * kd_enqsc - enqueue a scancode.  Should be called at SPLKD.
+ */
+
+void
+kd_enqsc(Scancode sc)
+{
+	kd_event ev;
+
+	ev.type = KEYBD_EVENT;
+	/* Not used but we set it to avoid garbage */
+	ev.unused_time.seconds = 0;
+	ev.unused_time.microseconds = 0;
+	ev.value.sc = sc;
+	kbd_enqueue(&ev);
+}
+
+
+/*
+ * kbd_enqueue - enqueue an event and wake up selecting processes, if
+ * any.  Should be called at SPLKD.
+ */
+
+void
+kbd_enqueue(kd_event *ev)
+{
+	if (kdq_full(&kbd_queue))
+		printf_once("kbd: queue full\n");
+	else
+		kdq_put(&kbd_queue, ev);
+
+	{
+	    io_req_t	ior;
+	    while ((ior = (io_req_t)dequeue_head(&kbd_read_queue)) != 0)
+		iodone(ior);
+	}
+}
+
+u_int X_kdb_enter_str[512], X_kdb_exit_str[512];
+int   X_kdb_enter_len = 0,  X_kdb_exit_len = 0;
+
+static void
+kdb_in_out(const u_int *p)
+{
+	int t = p[0];
+
+	switch (t & K_X_TYPE) {
+		case K_X_IN|K_X_BYTE:
+			inb(t & K_X_PORT);
+			break;
+
+		case K_X_IN|K_X_WORD:
+			inw(t & K_X_PORT);
+			break;
+
+		case K_X_IN|K_X_LONG:
+			inl(t & K_X_PORT);
+			break;
+
+		case K_X_OUT|K_X_BYTE:
+			outb(t & K_X_PORT, p[1]);
+			break;
+
+		case K_X_OUT|K_X_WORD:
+			outw(t & K_X_PORT, p[1]);
+			break;
+
+		case K_X_OUT|K_X_LONG:
+			outl(t & K_X_PORT, p[1]);
+			break;
+	}
+}
+
+void
+X_kdb_enter(void)
+{
+	u_int *u_ip, *endp;
+
+	for (u_ip = X_kdb_enter_str, endp = &X_kdb_enter_str[X_kdb_enter_len];
+	     u_ip < endp;
+	     u_ip += 2)
+	    kdb_in_out(u_ip);
+}
+
+void
+X_kdb_exit(void)
+{
+	u_int *u_ip, *endp;
+
+	for (u_ip = X_kdb_exit_str, endp = &X_kdb_exit_str[X_kdb_exit_len];
+	     u_ip < endp;
+	     u_ip += 2)
+	   kdb_in_out(u_ip);
+}
+
+io_return_t
+X_kdb_enter_init(
+    u_int *data,
+    u_int count)
+{
+    if (count * sizeof X_kdb_enter_str[0] > sizeof X_kdb_enter_str)
+	return D_INVALID_OPERATION;
+
+    memcpy(X_kdb_enter_str, data, count * sizeof X_kdb_enter_str[0]);
+    X_kdb_enter_len = count;
+    return D_SUCCESS;
+}
+
+io_return_t
+X_kdb_exit_init(
+    u_int *data,
+    u_int count)
+{
+    if (count * sizeof X_kdb_exit_str[0] > sizeof X_kdb_exit_str)
+	return D_INVALID_OPERATION;
+
+    memcpy(X_kdb_exit_str, data, count * sizeof X_kdb_exit_str[0]);
+    X_kdb_exit_len = count;
+    return D_SUCCESS;
+}