128 lines
3.8 KiB
C
128 lines
3.8 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2010,2011 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __mips__
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#include <grub/pci.h>
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#include <grub/mm.h>
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#endif
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#include <grub/machine/kernel.h>
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#include <grub/misc.h>
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#include <grub/vga.h>
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static struct {grub_uint8_t r, g, b, a; } colors[] =
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{
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// {R, G, B, A}
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{0x00, 0x00, 0x00, 0xFF}, // 0 = black
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{0x00, 0x00, 0xA8, 0xFF}, // 1 = blue
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{0x00, 0xA8, 0x00, 0xFF}, // 2 = green
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{0x00, 0xA8, 0xA8, 0xFF}, // 3 = cyan
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{0xA8, 0x00, 0x00, 0xFF}, // 4 = red
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{0xA8, 0x00, 0xA8, 0xFF}, // 5 = magenta
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{0xA8, 0x54, 0x00, 0xFF}, // 6 = brown
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{0xA8, 0xA8, 0xA8, 0xFF}, // 7 = light gray
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{0x54, 0x54, 0x54, 0xFF}, // 8 = dark gray
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{0x54, 0x54, 0xFE, 0xFF}, // 9 = bright blue
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{0x54, 0xFE, 0x54, 0xFF}, // 10 = bright green
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{0x54, 0xFE, 0xFE, 0xFF}, // 11 = bright cyan
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{0xFE, 0x54, 0x54, 0xFF}, // 12 = bright red
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{0xFE, 0x54, 0xFE, 0xFF}, // 13 = bright magenta
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{0xFE, 0xFE, 0x54, 0xFF}, // 14 = yellow
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{0xFE, 0xFE, 0xFE, 0xFF} // 15 = white
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};
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#include <ascii.h>
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#ifdef __mips__
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#define VGA_ADDR 0xb00a0000
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#else
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#define VGA_ADDR 0xa0000
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#endif
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static void
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load_font (void)
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{
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unsigned i;
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grub_vga_gr_write (0 << 2, GRUB_VGA_GR_GR6);
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grub_vga_sr_write (GRUB_VGA_SR_MEMORY_MODE_NORMAL, GRUB_VGA_SR_MEMORY_MODE);
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grub_vga_sr_write (1 << GRUB_VGA_TEXT_FONT_PLANE,
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GRUB_VGA_SR_MAP_MASK_REGISTER);
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grub_vga_gr_write (0, GRUB_VGA_GR_DATA_ROTATE);
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grub_vga_gr_write (0, GRUB_VGA_GR_MODE);
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grub_vga_gr_write (0xff, GRUB_VGA_GR_BITMASK);
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for (i = 0; i < 128; i++)
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grub_memcpy ((void *) (VGA_ADDR + 32 * i), ascii_bitmaps + 16 * i, 16);
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}
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static void
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load_palette (void)
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{
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unsigned i;
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for (i = 0; i < 16; i++)
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grub_vga_write_arx (i, i);
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for (i = 0; i < ARRAY_SIZE (colors); i++)
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grub_vga_palette_write (i, colors[i].r, colors[i].g, colors[i].b);
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}
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void
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grub_qemu_init_cirrus (void)
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{
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grub_outb (GRUB_VGA_IO_MISC_COLOR,
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GRUB_MACHINE_PCI_IO_BASE + GRUB_VGA_IO_MISC_WRITE);
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load_font ();
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grub_vga_gr_write (GRUB_VGA_GR_GR6_MMAP_CGA, GRUB_VGA_GR_GR6);
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grub_vga_gr_write (GRUB_VGA_GR_MODE_ODD_EVEN, GRUB_VGA_GR_MODE);
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grub_vga_sr_write (GRUB_VGA_SR_MEMORY_MODE_NORMAL, GRUB_VGA_SR_MEMORY_MODE);
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grub_vga_sr_write ((1 << GRUB_VGA_TEXT_TEXT_PLANE)
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| (1 << GRUB_VGA_TEXT_ATTR_PLANE),
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GRUB_VGA_SR_MAP_MASK_REGISTER);
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grub_vga_cr_write (15, GRUB_VGA_CR_CELL_HEIGHT);
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grub_vga_cr_write (79, GRUB_VGA_CR_HORIZ_END);
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grub_vga_cr_write (40, GRUB_VGA_CR_PITCH);
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int vert = 25 * 16;
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grub_vga_cr_write (vert & 0xff, GRUB_VGA_CR_VDISPLAY_END);
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grub_vga_cr_write (((vert >> GRUB_VGA_CR_OVERFLOW_HEIGHT1_SHIFT)
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& GRUB_VGA_CR_OVERFLOW_HEIGHT1_MASK)
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| ((vert >> GRUB_VGA_CR_OVERFLOW_HEIGHT2_SHIFT)
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& GRUB_VGA_CR_OVERFLOW_HEIGHT2_MASK),
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GRUB_VGA_CR_OVERFLOW);
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load_palette ();
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grub_vga_write_arx (GRUB_VGA_ARX_MODE_TEXT, GRUB_VGA_ARX_MODE);
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grub_vga_write_arx (0, GRUB_VGA_ARX_COLOR_SELECT);
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grub_vga_sr_write (GRUB_VGA_SR_CLOCKING_MODE_8_DOT_CLOCK,
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GRUB_VGA_SR_CLOCKING_MODE);
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grub_vga_cr_write (14, GRUB_VGA_CR_CURSOR_START);
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grub_vga_cr_write (15, GRUB_VGA_CR_CURSOR_END);
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grub_outb (0x20, GRUB_MACHINE_PCI_IO_BASE + GRUB_VGA_IO_ARX);
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}
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