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Commit	Line	Data
	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
	7	*
	8	* This file contains Original Code and/or Modifications of Original Code
	9	* as defined in and that are subject to the Apple Public Source License
	10	* Version 2.0 (the 'License'). You may not use this file except in
	11	* compliance with the License. Please obtain a copy of the License at
	12	* http://www.opensource.apple.com/apsl/ and read it before using this
	13	* file.
	14	*
	15	* The Original Code and all software distributed under the License are
	16	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	17	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	18	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	19	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	20	* Please see the License for the specific language governing rights and
	21	* limitations under the License.
	22	*
	23	* @APPLE_LICENSE_HEADER_END@
	24	*/
	25	/*
	26	* file: pe_kprintf.c
	27	* i386 platform expert debugging output initialization.
	28	*/
	29	#include <stdarg.h>
	30	#include <machine/machine_routines.h>
	31	#include <pexpert/pexpert.h>
	32	#include <kern/debug.h>
	33	#include <kern/simple_lock.h>
	34	#include <i386/mp.h>
	35
	36	/* extern references */
	37	extern void cnputc(char c);
	38	extern int serial_init(void);
	39	extern void serial_putc(char c);
	40
	41	/* Globals */
	42	void (*PE_kputc)(char c) = 0;
	43
	44	unsigned int disableSerialOuput = TRUE;
	45
	46	decl_simple_lock_data(static, kprintf_lock)
	47
	48	void PE_init_kprintf(boolean_t vm_initialized)
	49	{
	50	unsigned int boot_arg;
	51
	52	if (PE_state.initialized == FALSE)
	53	panic("Platform Expert not initialized");
	54
	55	if (!vm_initialized)
	56	{
	57	simple_lock_init(&kprintf_lock, 0);
	58
	59	if (PE_parse_boot_arg("debug", &boot_arg))
	60	if (boot_arg & DB_KPRT) disableSerialOuput = FALSE;
	61
	62	if (!disableSerialOuput && serial_init())
	63	PE_kputc = serial_putc;
	64	else
	65	PE_kputc = cnputc;
	66	}
	67	}
	68
	69	#ifdef MP_DEBUG
	70	static void _kprintf(const char *format, ...)
	71	{
	72	va_list listp;
	73
	74	va_start(listp, format);
	75	_doprnt(format, &listp, PE_kputc, 16);
	76	va_end(listp);
	77	}
	78	#define MP_DEBUG_KPRINTF(x...) _kprintf(x)
	79	#else /* MP_DEBUG */
	80	#define MP_DEBUG_KPRINTF(x...)
	81	#endif /* MP_DEBUG */
	82
	83	static int cpu_last_locked = 0;
	84	void kprintf(const char *fmt, ...)
	85	{
	86	va_list listp;
	87	boolean_t state;
	88
	89	if (!disableSerialOuput) {
	90	state = ml_set_interrupts_enabled(FALSE);
	91	simple_lock(&kprintf_lock);
	92
	93	if (cpu_number() != cpu_last_locked) {
	94	MP_DEBUG_KPRINTF("[cpu%d...]\n", cpu_number());
	95	cpu_last_locked = cpu_number();
	96	}
	97
	98	va_start(listp, fmt);
	99	_doprnt(fmt, &listp, PE_kputc, 16);
	100	va_end(listp);
	101
	102	simple_unlock(&kprintf_lock);
	103	ml_set_interrupts_enabled(state);
	104	}
	105	}