mirror of
https://github.com/ipxe/ipxe
synced 2026-01-15 20:06:36 +03:00
e024cd39a8
Add the concept of a "console usage", such as "standard output" or "debug messages". Allow usages to be associated with each console independently. For example, to send debugging output via the serial port, while preventing it from appearing on the local console: #define CONSOLE_SERIAL CONSOLE_USAGE_ALL #define CONSOLE_PCBIOS ( CONSOLE_USAGE_ALL & ~CONSOLE_USAGE_DEBUG ) If no usages are explicitly specified, then a default set of usages will be applied. For example: #define CONSOLE_SERIAL will have the same affect as #define CONSOLE_SERIAL CONSOLE_USAGE_ALL Signed-off-by: Michael Brown <mcb30@ipxe.org>
114 lines
2.1 KiB
C
114 lines
2.1 KiB
C
/*
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*
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* modified from linuxbios code
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* by Cai Qiang <rimy2000@hotmail.com>
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*
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*/
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#include "stddef.h"
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#include "string.h"
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#include <ipxe/io.h>
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#include <ipxe/console.h>
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#include <ipxe/init.h>
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#include "vga.h"
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#include <config/console.h>
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/* Set default console usage if applicable */
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#if ! ( defined ( CONSOLE_DIRECT_VGA ) && \
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CONSOLE_EXPLICIT ( CONSOLE_DIRECT_VGA ) )
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#undef CONSOLE_DIRECT_VGA
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#define CONSOLE_DIRECT_VGA CONSOLE_USAGE_ALL
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#endif
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struct console_driver vga_console __console_driver;
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static char *vidmem; /* The video buffer */
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static int video_line, video_col;
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#define VIDBUFFER 0xB8000
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static void memsetw(void *s, int c, unsigned int n)
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{
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unsigned int i;
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u16 *ss = (u16 *) s;
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for (i = 0; i < n; i++) {
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ss[i] = ( u16 ) c;
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}
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}
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static void video_init(void)
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{
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static int inited=0;
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vidmem = (char *)phys_to_virt(VIDBUFFER);
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if (!inited) {
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video_line = 0;
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video_col = 0;
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memsetw(vidmem, VGA_ATTR_CLR_WHT, 2*1024); //
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inited=1;
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}
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}
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static void video_scroll(void)
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{
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int i;
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memcpy(vidmem, vidmem + COLS * 2, (LINES - 1) * COLS * 2);
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for (i = (LINES - 1) * COLS * 2; i < LINES * COLS * 2; i += 2)
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vidmem[i] = ' ';
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}
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static void vga_putc(int byte)
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{
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if (byte == '\n') {
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video_line++;
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video_col = 0;
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} else if (byte == '\r') {
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video_col = 0;
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} else if (byte == '\b') {
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video_col--;
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} else if (byte == '\t') {
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video_col += 4;
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} else if (byte == '\a') {
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//beep
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//beep(500);
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} else {
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vidmem[((video_col + (video_line *COLS)) * 2)] = byte;
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vidmem[((video_col + (video_line *COLS)) * 2) +1] = VGA_ATTR_CLR_WHT;
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video_col++;
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}
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if (video_col < 0) {
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video_col = 0;
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}
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if (video_col >= COLS) {
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video_line++;
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video_col = 0;
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}
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if (video_line >= LINES) {
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video_scroll();
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video_line--;
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}
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// move the cursor
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write_crtc((video_col + (video_line *COLS)) >> 8, CRTC_CURSOR_HI);
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write_crtc((video_col + (video_line *COLS)) & 0x0ff, CRTC_CURSOR_LO);
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}
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struct console_driver vga_console __console_driver = {
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.putchar = vga_putc,
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.disabled = 1,
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.usage = CONSOLE_DIRECT_VGA,
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};
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struct init_fn video_init_fn __init_fn ( INIT_EARLY ) = {
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.initialise = video_init,
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};
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