+++ /dev/null
-/*
- * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the License
- * may not be used to create, or enable the creation or redistribution of,
- * unlawful or unlicensed copies of an Apple operating system, or to
- * circumvent, violate, or enable the circumvention or violation of, any
- * terms of an Apple operating system software license agreement.
- *
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
- */
-
-/*
- * text_console.c
- *
- * VGA text console support.
- */
-
-#include <architecture/i386/pio.h>
-#include <console/video_console.h>
-#include "text_console.h"
-
-/*
- * Macros and typedefs.
- */
-typedef short csrpos_t; /* cursor position, ONE_SPACE bytes per char */
-
-#define ONE_SPACE 2 /* bytes per character */
-#define ONE_LINE (vga_cols * ONE_SPACE) /* number of bytes in line */
-#define ONE_PAGE (vga_rows * ONE_LINE) /* number of bytes in page */
-#define SPACE_CHAR 0x20
-
-#define VGA_FB_START 0x0b8000
-#define VGA_FB_SIZE 0x8000
-#define VGA_IDX_REG 0x3d4
-#define VGA_IO_REG 0x3d5
-
-/*
- * Commands sent to graphics adapter.
- */
-#define VGA_C_START 0x0a /* cursor start position, on/off bit */
-#define VGA_C_LOW 0x0f /* return low byte of cursor addr */
-#define VGA_C_HIGH 0x0e /* high byte */
-
-/*
- * Attributes for character sent to display.
- */
-#define VGA_ATTR_NORMAL 0x07
-#define VGA_ATTR_REVERSE 0x70
-
-/*
- * Cursor Start Register bit fields.
- */
-#define VGA_CURSOR_CS 0x1F
-#define VGA_CURSOR_ON 0x20
-
-/*
- * Convert from XY coordinate to a location in display memory.
- */
-#define XY_TO_CSRPOS(x, y) (((y) * vga_cols + (x)) * ONE_SPACE)
-
-/*
- * Globals.
- */
-static short vga_idx_reg; /* location of VGA index register */
-static short vga_io_reg; /* location of VGA data register */
-static short vga_cols = 80; /* number of columns */
-static short vga_rows = 25; /* number of rows */
-static char vga_attr; /* current character attribute */
-static char vga_attr_rev; /* current reverse attribute */
-static char vga_cursor_start; /* cached cursor start scan line */
-static unsigned char *vram_start; /* VM start of VGA frame buffer */
-
-/*
- * Functions in kdasm.s.
- */
-extern void kd_slmwd(unsigned char * pos, int count, unsigned short val);
-extern void kd_slmscu(unsigned char * from, unsigned char * to, int count);
-extern void kd_slmscd(unsigned char * from, unsigned char * to, int count);
-
-/*
- * move_up
- *
- * Block move up for VGA.
- */
-static void
-move_up( csrpos_t from,
- csrpos_t to,
- int count)
-{
- if (vram_start == 0) return;
- kd_slmscu( vram_start + from, vram_start + to, count );
-}
-
-/*
- * move_down
- *
- * Block move down for VGA.
- */
-static void
-move_down( csrpos_t from,
- csrpos_t to,
- int count )
-{
- if (vram_start == 0) return;
- kd_slmscd( vram_start + from, vram_start + to, count );
-}
-
-/*
- * clear_block
- *
- * Fast clear for VGA.
- */
-static void
-clear_block( csrpos_t start,
- int size,
- char attr)
-{
- if (vram_start == 0) return;
- kd_slmwd( vram_start + start, size,
- ((unsigned short) attr << 8) + SPACE_CHAR);
-}
-
-/*
- * set_cursor_position
- *
- * This function sets the hardware cursor position
- * on the screen.
- */
-static void
-set_cursor_position( csrpos_t newpos )
-{
- short curpos; /* position, not scaled for attribute byte */
-
- curpos = newpos / ONE_SPACE;
-
- outb(vga_idx_reg, VGA_C_HIGH);
- outb(vga_io_reg, (unsigned char)(curpos >> 8));
-
- outb(vga_idx_reg, VGA_C_LOW);
- outb(vga_io_reg, (unsigned char)(curpos & 0xff));
-}
-
-/*
- * set_cursor_enable
- *
- * Allow the cursor to be turned on or off.
- */
-static void
-set_cursor_enable( boolean_t enable )
-{
- outb(vga_idx_reg, VGA_C_START);
- outb(vga_io_reg, vga_cursor_start |
- (enable == TRUE ? VGA_CURSOR_ON : 0));
-}
-
-/*
- * display_char
- *
- * Display attributed character for VGA (mode 3).
- */
-static void
-display_char( csrpos_t pos, /* where to put it */
- char ch, /* the character */
- char attr ) /* its attribute */
-{
- if (vram_start == 0) return;
- *(vram_start + pos) = ch;
- *(vram_start + pos + 1) = attr;
-}
-
-/*
- * vga_init
- *
- * Initialize the VGA text console.
- */
-static void
-vga_init(int cols, int rows, unsigned char * addr)
-{
- vram_start = addr;
- vga_idx_reg = VGA_IDX_REG;
- vga_io_reg = VGA_IO_REG;
- vga_rows = rows;
- vga_cols = cols;
- vga_attr = VGA_ATTR_NORMAL;
- vga_attr_rev = VGA_ATTR_REVERSE;
-
- /* cache cursor start position */
- outb(vga_idx_reg, VGA_C_START);
- vga_cursor_start = inb(vga_io_reg) & VGA_CURSOR_CS;
-
- /* defaults to a hidden hw cursor */
- set_cursor_enable( FALSE );
-}
-
-/*
- * tc_scroll_up
- *
- * Scroll the screen up 'n' character lines.
- */
-void
-tc_scroll_up(int lines, __unused unsigned int top, __unused unsigned int bottom)
-{
- csrpos_t to;
- csrpos_t from;
- int size;
-
- /* scroll up */
- to = 0;
- from = ONE_LINE * lines;
- size = ( ONE_PAGE - ( ONE_LINE * lines ) ) / ONE_SPACE;
- move_up(from, to, size);
-
- /* clear bottom line */
- to = ( ( vga_rows - lines) * ONE_LINE );
- size = ( ONE_LINE * lines ) / ONE_SPACE;
- clear_block(to, size, vga_attr);
-}
-
-/*
- * tc_scroll_down
- *
- * Scrolls the screen down 'n' character lines.
- */
-void
-tc_scroll_down(int lines, __unused unsigned int top,
- __unused unsigned int bottom)
-{
- csrpos_t to;
- csrpos_t from;
- int size;
-
- /* move down */
- to = ONE_PAGE - ONE_SPACE;
- from = ONE_PAGE - ( ONE_LINE * lines ) - ONE_SPACE;
- size = ( ONE_PAGE - ( ONE_LINE * lines ) ) / ONE_SPACE;
- move_down(from, to, size);
-
- /* clear top line */
- to = 0;
- size = ( ONE_LINE * lines ) / ONE_SPACE;
- clear_block(to, size, vga_attr);
-}
-
-/* Default colors for 16-color palette */
-enum {
- kVGAColorBlack = 0,
- kVGAColorBlue,
- kVGAColorGreen,
- kVGAColorCyan,
- kVGAColorRed,
- kVGAColorMagenta,
- kVGAColorBrown,
- kVGAColorWhite,
- kVGAColorGray,
- kVGAColorLightBlue,
- kVGAColorLightGreen,
- kVGAColorLightCyan,
- kVGAColorLightRed,
- kVGAColorLightMagenta,
- kVGAColorLightBrown,
- kVGAColorBrightWhite
-};
-
-/*
- * tc_update_color
- *
- * Update the foreground / background color.
- */
-void
-tc_update_color( int color, int fore )
-{
- unsigned char mask_on, mask_off;
-
- switch ( color )
- {
- case 1: mask_on = kVGAColorRed; break;
- case 3: mask_on = kVGAColorLightBrown; break;
- case 4: mask_on = kVGAColorBlue; break;
- case 6: mask_on = kVGAColorCyan; break;
- default: mask_on = color; break;
- }
-
- if ( fore )
- {
- mask_off = 0x0f;
- }
- else
- {
- mask_off = 0xf0;
- mask_on <<= 4;
- }
-
- vga_attr = (vga_attr & ~mask_off) | mask_on;
-
- vga_attr_rev = ( ((vga_attr << 4) & 0xf0) |
- ((vga_attr >> 4) & 0x0f) );
-}
-
-/*
- * tc_show_cursor
- *
- * Show the hardware cursor.
- */
-void
-tc_show_cursor(unsigned int x, unsigned int y)
-{
- set_cursor_position( XY_TO_CSRPOS(x, y) );
- set_cursor_enable( TRUE );
-}
-
-/*
- * tc_hide_cursor
- *
- * Hide the hardware cursor.
- */
-void
-tc_hide_cursor(__unused unsigned int x, __unused unsigned int y)
-{
- set_cursor_enable( FALSE );
-}
-
-/*
- * tc_clear_screen
- *
- * Clear the entire screen, or a portion of the screen
- * relative to the current cursor position.
- */
-void
-tc_clear_screen(unsigned int x, unsigned int y, __unused unsigned int top,
- __unused unsigned int bottom, int operation)
-{
- csrpos_t start;
- int count;
-
- switch ( operation )
- {
- case 0: /* To end of screen */
- start = XY_TO_CSRPOS(x, y);
- count = ONE_PAGE - start;
- break;
- case 1: /* To start of screen */
- start = 0;
- count = XY_TO_CSRPOS(x, y) + ONE_SPACE;
- break;
- default:
- case 2: /* Whole screen */
- start = 0;
- count = ONE_PAGE;
- break;
- }
- clear_block(start, count, vga_attr);
-}
-
-/*
- * tc_paint_char
- *
- * Display a character on screen with the given coordinates,
- * and attributes.
- */
-void
-tc_paint_char(unsigned int x, unsigned int y, unsigned char ch, int attrs,
- __unused unsigned char ch_previous, __unused int attrs_previous)
-{
- char my_attr = vga_attr;
-
- if ( attrs & 4 ) my_attr = vga_attr_rev;
-
- display_char( XY_TO_CSRPOS(x, y), ch, vga_attr );
-}
-
-/*
- * tc_enable
- *
- * Enable / disable the console.
- */
-void
-tc_enable(__unused boolean_t enable)
-{
-
-}
-
-/*
- * tc_initialize
- *
- * Must be called before any other exported functions.
- */
-void
-tc_initialize(struct vc_info * vinfo_p)
-{
- vinfo_p->v_rows = vinfo_p->v_height;
- vinfo_p->v_columns = vinfo_p->v_width;
-
- vga_init( vinfo_p->v_columns,
- vinfo_p->v_rows,
- (unsigned char *) vinfo_p->v_baseaddr);
-}
projects / apple / xnu.git / blobdiff