Joshua Wise's Git repositories - netwatch.git/blame_incremental

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Commit	Line	Data
	1	/* vga-overlay.c
	2	* VGA text overlay code
	3	* NetWatch system management mode administration console
	4	*
	5	* Copyright (c) 2008 Jacob Potter and Joshua Wise. All rights reserved.
	6	* This program is free software; you can redistribute and/or modify it under
	7	* the terms found in the file LICENSE in the root of this source tree.
	8	*
	9	*/
	10
	11	#include <io.h>
	12	#include <smram.h>
	13	#include <video_defines.h>
	14	#include <minilib.h>
	15	#include <stdarg.h>
	16	#include <output.h>
	17	#include <serial.h>
	18
	19	#define LOGLEN 96
	20	#define LOG_ONSCREEN 4
	21
	22	static char logents[LOGLEN][41] = {{0}};
	23	static int prodptr = 0;
	24	static int flush_imm = 0;
	25
	26	#define VRAM_BASE 0xA0000UL
	27	#define TEXT_CONSOLE_OFFSET 0x18000UL
	28
	29	#define TEXT_CONSOLE_BASE (VRAM_BASE + TEXT_CONSOLE_OFFSET)
	30
	31	#define COLOR 0x1F
	32
	33	void vga_flush_imm(int imm)
	34	{
	35	flush_imm = imm;
	36	}
	37
	38	static unsigned char vga_read(unsigned char idx)
	39	{
	40	outb(CRTC_IDX_REG, idx);
	41	return inb(CRTC_DATA_REG);
	42	}
	43
	44	static char * vga_base()
	45	{
	46	return (char *) (
	47	TEXT_CONSOLE_BASE
	48	+ (((unsigned int) vga_read(CRTC_START_ADDR_MSB_IDX)) << 9)
	49	+ (((unsigned int) vga_read(CRTC_START_ADDR_LSB_IDX)) << 1)
	50	);
	51	}
	52
	53	void strblit(char *src, int row, int col, int fill)
	54	{
	55	char destp = vga_base() + row 80 * 2 + col * 2;
	56	outb(0x80, 0x3C);
	57	smram_state_t old_state = smram_save_state();
	58	outb(0x80, 0x3D);
	59
	60	smram_aseg_set_state(SMRAM_ASEG_SMMCODE);
	61	outb(0x80, 0x3E);
	62
	63	while (*src)
	64	{
	65	(destp++) = (src++);
	66	*(destp++) = COLOR;
	67	col++;
	68	}
	69	if (fill)
	70	while (col < 80)
	71	{
	72	*(destp++) = ' ';
	73	*(destp++) = COLOR;
	74	col++;
	75	}
	76
	77	outb(0x80, 0x3F);
	78	smram_restore_state(old_state);
	79	outb(0x80, 0x40);
	80	}
	81
	82	void outlog()
	83	{
	84	/*
	85	int y;
	86
	87	for (y = -LOG_ONSCREEN; y < 0; y++)
	88	strblit(logents[(y + prodptr + LOGLEN) % LOGLEN], y + LOG_ONSCREEN, 40, 1);
	89	*/
	90	}
	91
	92	void dolog(const char *s)
	93	{
	94	strcpy(logents[prodptr], s);
	95	prodptr = (prodptr + 1) % LOGLEN;
	96	while (*s)
	97	serial_tx(*(s++));
	98	serial_tx('\r');
	99	serial_tx('\n');
	100	if (flush_imm)
	101	outlog();
	102	}
	103	void (output)(const char s) = dolog;
	104
	105	void dologf(const char *fmt, ...)
	106	{
	107	char *s;
	108	va_list va;
	109
	110	va_start(va, fmt);
	111	vsnprintf(logents[prodptr], 40, fmt, va);
	112	s = logents[prodptr];
	113	while (*s)
	114	serial_tx(*(s++));
	115	serial_tx('\r');
	116	serial_tx('\n');
	117	va_end(va);
	118	prodptr = (prodptr + 1) % LOGLEN;
	119	if (flush_imm)
	120	outlog();
	121	}
	122	void (outputf)(const char s, ...) = dologf;
	123
	124	void dump_log (char * target) {
	125	memcpy(target, logents, sizeof(logents));
	126	}