X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/21362eb3e66fd2c787aee132bce100a44d71a99c..4452a7af2eac33dbad800bcc91f2399d62c18f53:/osfmk/console/serial_general.c

diff --git a/osfmk/console/serial_general.c b/osfmk/console/serial_general.c
new file mode 100644
index 000000000..d9876f79f
--- /dev/null
+++ b/osfmk/console/serial_general.c
@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) 2005 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ * 
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+/*
+ * @OSF_COPYRIGHT@
+ */
+/*
+ * @APPLE_FREE_COPYRIGHT@
+ */
+
+#include <mach_kdb.h>
+#include <platforms.h>
+#include <kern/spl.h>
+#include <mach/std_types.h>
+#include <types.h>
+#include <kern/thread.h>
+#include <console/serial_protos.h>
+
+extern unsigned int disableSerialOuput;
+extern void cons_cinput(char ch);		/* The BSD routine that gets characters */
+
+unsigned int serialmode;				/* Serial mode keyboard and console control */
+
+/*
+ *  This routine will start a thread that polls the serial port, listening for
+ *  characters that have been typed.
+ */
+
+void
+serial_keyboard_init(void)
+{
+	kern_return_t	result;
+	thread_t		thread;
+
+	if(!(serialmode & 2)) return;		/* Leave if we do not want a serial console */
+
+	kprintf("Serial keyboard started\n");
+	result = kernel_thread_start_priority((thread_continue_t)serial_keyboard_start, NULL, MAXPRI_KERNEL, &thread);
+	if (result != KERN_SUCCESS)
+		panic("serial_keyboard_init");
+
+	thread_deallocate(thread);
+}
+
+void
+serial_keyboard_start(void)
+{
+
+	serial_keyboard_poll();				/* Go see if there are any characters pending now */
+	panic("serial_keyboard_start: we can't get back here\n");
+
+}
+
+void
+serial_keyboard_poll(void)
+{
+	int chr;
+	uint64_t next;
+
+
+	while(1) {							/* Do this for a while */
+		chr = _serial_getc(0, 1, 0, 1);	/* Get a character if there is one */
+		if(chr < 0) break;				/* The serial buffer is empty */
+		cons_cinput((char)chr);			/* Buffer up the character */
+	}
+
+	clock_interval_to_deadline(16, 1000000, &next);	/* Get time of pop */
+
+	assert_wait_deadline((event_t)serial_keyboard_poll, THREAD_UNINT, next);	/* Show we are "waiting" */
+	thread_block((thread_continue_t)serial_keyboard_poll);	/* Wait for it */
+	panic("serial_keyboard_poll: Shouldn't never ever get here...\n");
+}
+
+boolean_t console_is_serial()
+{
+	return cons_ops_index == SERIAL_CONS_OPS;
+}
+
+int
+switch_to_video_console()
+{
+	int old_cons_ops = cons_ops_index;
+	cons_ops_index = VC_CONS_OPS;
+	return old_cons_ops;
+}
+
+int
+switch_to_serial_console()
+{
+	int old_cons_ops = cons_ops_index;
+	cons_ops_index = SERIAL_CONS_OPS;
+	return old_cons_ops;
+}
+
+/* The switch_to_{video,serial,kgdb}_console functions return a cookie that
+   can be used to restore the console to whatever it was before, in the
+   same way that splwhatever() and splx() work.  */
+void
+switch_to_old_console(int old_console)
+{
+	static boolean_t squawked;
+	uint32_t ops = old_console;
+
+	if ((ops >= nconsops) && !squawked) {
+		squawked = TRUE;
+		printf("switch_to_old_console: unknown ops %d\n", ops);
+	} else
+		cons_ops_index = ops;
+}