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      1 /*	$NetBSD: debug.c,v 1.11 2008/04/28 20:23:22 martin Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001, 2002 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by UCHIYAMA Yasushi.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: debug.c,v 1.11 2008/04/28 20:23:22 martin Exp $");
     34 
     35 #include "debug_hpc.h"
     36 
     37 #include <sys/param.h>
     38 #include <sys/systm.h>
     39 
     40 #include <machine/debug.h>
     41 #include <machine/bootinfo.h>
     42 
     43 #ifdef HPC_DEBUG_INTERRUPT_MONITOR
     44 static struct intr_state_rgb16 {
     45 	int cnt;
     46 	int phase;
     47 	/* R:G:B = [15:11][10:5][4:0] */
     48 	uint16_t color;
     49 } __intr_state_rgb16[] = {
     50 	{ 0, 0, RGB565_BLACK },
     51 	{ 0, 0, RGB565_RED },
     52 	{ 0, 0, RGB565_GREEN },
     53 	{ 0, 0, RGB565_YELLOW },
     54 	{ 0, 0, RGB565_BLUE },
     55 	{ 0, 0, RGB565_MAGENTA },
     56 	{ 0, 0, RGB565_CYAN },
     57 	{ 0, 0, RGB565_WHITE },
     58 };
     59 
     60 void
     61 __dbg_heart_beat(enum heart_beat cause) /* 16bpp R:G:B = 5:6:5 only */
     62 {
     63 #define LINE_STEP	2
     64 	struct intr_state_rgb16 *intr_state_rgb16 =
     65 	    &__intr_state_rgb16[cause & 0x7];
     66 	uint16_t *fb = (uint16_t *)bootinfo->fb_addr;
     67 	int hline = bootinfo->fb_width;
     68 	uint16_t color = intr_state_rgb16->color;
     69 	int i;
     70 
     71 	fb += (cause & 0x7) * bootinfo->fb_line_bytes * LINE_STEP;
     72 	if (++intr_state_rgb16->cnt > hline)
     73 		intr_state_rgb16->cnt = 0, intr_state_rgb16->phase ^= 1;
     74 
     75 	for (i = 0; i < 8; i++)
     76 		*(fb + i) = color;
     77 	*(fb + intr_state_rgb16->cnt) =
     78 	    intr_state_rgb16->phase ? ~color : color;
     79 #undef LINE_STEP
     80 }
     81 #endif /* HPC_DEBUG_INTERRUPT_MONITOR */
     82