--- /dev/null
+/*
+ * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ *
+ * 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. 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_LICENSE_HEADER_END@
+ */
+
+/*
+ * text_console.c
+ *
+ * VGA text console support.
+ */
+
+#include <i386/pio.h>
+#include <console/video_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_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
+
+/*
+ * 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 = 0; /* location of VGA index register */
+static short vga_io_reg = 0; /* 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 = 0; /* current character attribute */
+static char vga_attr_rev = 0; /* current reverse attribute */
+static char * vram_start = 0; /* 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)
+{
+ 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 )
+{
+ 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)
+{
+ 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));
+}
+
+/*
+ * 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 */
+{
+ *(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;
+
+ set_cursor_position(0);
+}
+
+/*
+ * tc_scroll_up
+ *
+ * Scroll the screen up 'n' character lines.
+ */
+void
+tc_scroll_up( int lines, int top, 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, int top, 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( int x, int y )
+{
+ set_cursor_position( XY_TO_CSRPOS(x, y) );
+}
+
+/*
+ * tc_hide_cursor
+ *
+ * Hide the hardware cursor.
+ */
+void
+tc_hide_cursor( int x, int y )
+{
+ return;
+}
+
+/*
+ * tc_clear_screen
+ *
+ * Clear the entire screen, or a portion of the screen
+ * relative to the current cursor position.
+ */
+void
+tc_clear_screen(int x, int y, int top, 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( int x, int y, unsigned char ch, int attrs, unsigned char ch_previous, 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(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