[netwatch.git] / aseg-paging / vga-overlay.c

#include <io.h>
#include <smram.h>
#include <video_defines.h>
#include <minilib.h>
#include <stdarg.h>
#include <output.h>
#include <serial.h>

#define LOGLEN 96
#define LOG_ONSCREEN 4

static char logents[LOGLEN][41] = {{0}};
static int prodptr = 0;
static int flush_imm = 0;

#define VRAM_BASE		0xA0000UL
#define TEXT_CONSOLE_OFFSET	0x18000UL 

#define TEXT_CONSOLE_BASE	(VRAM_BASE + TEXT_CONSOLE_OFFSET)

#define COLOR			0x1F

void vga_flush_imm(int imm)
{
	flush_imm = imm;
}

static unsigned char vga_read(unsigned char idx)
{
	outb(CRTC_IDX_REG, idx);
	return inb(CRTC_DATA_REG);
}

static char * vga_base()
{
	return (char *) (
		TEXT_CONSOLE_BASE
		+ (((unsigned int) vga_read(CRTC_START_ADDR_MSB_IDX)) << 9)
		+ (((unsigned int) vga_read(CRTC_START_ADDR_LSB_IDX)) << 1)
	);
}

void strblit(char *src, int row, int col, int fill)
{
	char *destp = vga_base() + row * 80 * 2 + col * 2;
	outb(0x80, 0x3C);
	smram_state_t old_state = smram_save_state();
	outb(0x80, 0x3D);

	smram_aseg_set_state(SMRAM_ASEG_SMMCODE);
	outb(0x80, 0x3E);

	while (*src)
	{
		*(destp++) = *(src++);
		*(destp++) = COLOR;
		col++;
	}
	if (fill)
		while (col < 80)
		{
			*(destp++) = ' ';
			*(destp++) = COLOR;
			col++;
		}

	outb(0x80, 0x3F);
	smram_restore_state(old_state);
	outb(0x80, 0x40);
}

void outlog()
{
	int y;

	for (y = -LOG_ONSCREEN; y < 0; y++)
		strblit(logents[(y + prodptr) % LOGLEN], y + LOG_ONSCREEN, 40, 1);
}

void dolog(const char *s)
{
	strcpy(logents[prodptr], s);
	prodptr = (prodptr + 1) % LOGLEN;
	while (*s)
		serial_tx(*(s++));
	serial_tx('\r');
	serial_tx('\n');
	if (flush_imm)
		outlog();
}
void (*output)(const char *s) = dolog;

void dologf(const char *fmt, ...)
{
	char *s;
	va_list va;
	
	va_start(va, fmt);
	vsnprintf(logents[prodptr], 40, fmt, va);
	s = logents[prodptr];
	while (*s)
		serial_tx(*(s++));
	serial_tx('\r');
	serial_tx('\n');
	va_end(va);
	prodptr = (prodptr + 1) % LOGLEN;
	if (flush_imm)
		outlog();
}
void (*outputf)(const char *s, ...) = dologf;

void dump_log (char * target) {
	memcpy(target, logents, sizeof(logents));
}
Commit	Line	Data
9e2a82e4 JP	1	#include <io.h>
	2	#include <smram.h>
	3	#include <video_defines.h>
	4	#include <minilib.h>
	5	#include <stdarg.h>
	6	#include <output.h>
bf47740a	7	#include <serial.h>
9e2a82e4 JP	8
	9	#define LOGLEN 96
	10	#define LOG_ONSCREEN 4
	11
	12	static char logents[LOGLEN][41] = {{0}};
	13	static int prodptr = 0;
	14	static int flush_imm = 0;
	15
	16	#define VRAM_BASE 0xA0000UL
	17	#define TEXT_CONSOLE_OFFSET 0x18000UL
	18
	19	#define TEXT_CONSOLE_BASE (VRAM_BASE + TEXT_CONSOLE_OFFSET)
	20
	21	#define COLOR 0x1F
	22
	23	void vga_flush_imm(int imm)
	24	{
	25	flush_imm = imm;
	26	}
	27
	28	static unsigned char vga_read(unsigned char idx)
	29	{
	30	outb(CRTC_IDX_REG, idx);
	31	return inb(CRTC_DATA_REG);
	32	}
	33
	34	static char * vga_base()
	35	{
	36	return (char *) (
	37	TEXT_CONSOLE_BASE
	38	+ (((unsigned int) vga_read(CRTC_START_ADDR_MSB_IDX)) << 9)
	39	+ (((unsigned int) vga_read(CRTC_START_ADDR_LSB_IDX)) << 1)
	40	);
	41	}
	42
a02e8abd	43	void strblit(char *src, int row, int col, int fill)
9e2a82e4 JP	44	{
	45	char destp = vga_base() + row 80 * 2 + col * 2;
	46	outb(0x80, 0x3C);
	47	smram_state_t old_state = smram_save_state();
	48	outb(0x80, 0x3D);
	49
	50	smram_aseg_set_state(SMRAM_ASEG_SMMCODE);
	51	outb(0x80, 0x3E);
	52
	53	while (*src)
	54	{
	55	(destp++) = (src++);
	56	*(destp++) = COLOR;
a02e8abd	57	col++;
9e2a82e4	58	}
a02e8abd JW	59	if (fill)
	60	while (col < 80)
	61	{
	62	*(destp++) = ' ';
	63	*(destp++) = COLOR;
	64	col++;
	65	}
9e2a82e4 JP	66
	67	outb(0x80, 0x3F);
	68	smram_restore_state(old_state);
	69	outb(0x80, 0x40);
	70	}
	71
	72	void outlog()
	73	{
a02e8abd	74	int y;
9e2a82e4	75
9e2a82e4	76	for (y = -LOG_ONSCREEN; y < 0; y++)
a02e8abd	77	strblit(logents[(y + prodptr) % LOGLEN], y + LOG_ONSCREEN, 40, 1);
9e2a82e4 JP	78	}
	79
	80	void dolog(const char *s)
	81	{
	82	strcpy(logents[prodptr], s);
	83	prodptr = (prodptr + 1) % LOGLEN;
bf47740a	84	while (*s)
5a626f09	85	serial_tx(*(s++));
113df320 JW	86	serial_tx('\r');
113df320 JW	87	serial_tx('\n');
9e2a82e4 JP	88	if (flush_imm)
	89	outlog();
	90	}
	91	void (output)(const char s) = dolog;
	92
	93	void dologf(const char *fmt, ...)
	94	{
113df320 JW	95	char *s;
	96	va_list va;
	97
	98	va_start(va, fmt);
	99	vsnprintf(logents[prodptr], 40, fmt, va);
	100	s = logents[prodptr];
	101	while (*s)
	102	serial_tx(*(s++));
	103	serial_tx('\r');
	104	serial_tx('\n');
	105	va_end(va);
	106	prodptr = (prodptr + 1) % LOGLEN;
	107	if (flush_imm)
	108	outlog();
9e2a82e4 JP	109	}
	110	void (outputf)(const char s, ...) = dologf;
	111
	112	void dump_log (char * target) {
	113	memcpy(target, logents, sizeof(logents));
	114	}
	115