arch/all-pc/boot/grub2-aros/grub-core/kern/i386/qemu/init.c

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2010  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <grub/pci.h>
  20 #include <grub/machine/kernel.h>
  21 #include <grub/misc.h>
  22 #include <grub/vga.h>
  23
  24 static struct {grub_uint8_t r, g, b, a; } colors[] =
  25   {
  26     // {R, G, B, A}
  27     {0x00, 0x00, 0x00, 0xFF}, // 0 = black
  28     {0x00, 0x00, 0xA8, 0xFF}, // 1 = blue
  29     {0x00, 0xA8, 0x00, 0xFF}, // 2 = green
  30     {0x00, 0xA8, 0xA8, 0xFF}, // 3 = cyan
  31     {0xA8, 0x00, 0x00, 0xFF}, // 4 = red
  32     {0xA8, 0x00, 0xA8, 0xFF}, // 5 = magenta
  33     {0xA8, 0x54, 0x00, 0xFF}, // 6 = brown
  34     {0xA8, 0xA8, 0xA8, 0xFF}, // 7 = light gray
  35
  36     {0x54, 0x54, 0x54, 0xFF}, // 8 = dark gray
  37     {0x54, 0x54, 0xFE, 0xFF}, // 9 = bright blue
  38     {0x54, 0xFE, 0x54, 0xFF}, // 10 = bright green
  39     {0x54, 0xFE, 0xFE, 0xFF}, // 11 = bright cyan
  40     {0xFE, 0x54, 0x54, 0xFF}, // 12 = bright red
  41     {0xFE, 0x54, 0xFE, 0xFF}, // 13 = bright magenta
  42     {0xFE, 0xFE, 0x54, 0xFF}, // 14 = yellow
  43     {0xFE, 0xFE, 0xFE, 0xFF}  // 15 = white
  44   };
  45
  46 #include <ascii.h>
  47
  48 static void
  49 load_font (void)
  50 {
  51   unsigned i;
  52
  53   grub_vga_gr_write (0 << 2, GRUB_VGA_GR_GR6);
  54
  55   grub_vga_sr_write (GRUB_VGA_SR_MEMORY_MODE_NORMAL, GRUB_VGA_SR_MEMORY_MODE);
  56   grub_vga_sr_write (1 << GRUB_VGA_TEXT_FONT_PLANE,
  57                      GRUB_VGA_SR_MAP_MASK_REGISTER);
  58
  59   grub_vga_gr_write (0, GRUB_VGA_GR_DATA_ROTATE);
  60   grub_vga_gr_write (0, GRUB_VGA_GR_MODE);
  61   grub_vga_gr_write (0xff, GRUB_VGA_GR_BITMASK);
  62
  63   for (i = 0; i < 128; i++)
  64     grub_memcpy ((void *) (0xa0000 + 32 * i), ascii_bitmaps + 16 * i, 16);
  65 }
  66
  67 static void
  68 load_palette (void)
  69 {
  70   unsigned i;
  71   for (i = 0; i < 16; i++)
  72     grub_vga_write_arx (i, i);
  73
  74   for (i = 0; i < ARRAY_SIZE (colors); i++)
  75     grub_vga_palette_write (i, colors[i].r, colors[i].g, colors[i].b);
  76 }
  77
  78 void
  79 grub_qemu_init_cirrus (void)
  80 {
  81   auto int NESTED_FUNC_ATTR find_card (grub_pci_device_t dev, grub_pci_id_t pciid);
  82   int NESTED_FUNC_ATTR find_card (grub_pci_device_t dev, grub_pci_id_t pciid __attribute__ ((unused)))
  83     {
  84       grub_pci_address_t addr;
  85       grub_uint32_t class;
  86
  87       addr = grub_pci_make_address (dev, GRUB_PCI_REG_CLASS);
  88       class = grub_pci_read (addr);
  89
  90       if (((class >> 16) & 0xffff) != GRUB_PCI_CLASS_SUBCLASS_VGA)
  91         return 0;
  92
  93       /* FIXME: chooose addresses dynamically.  */
  94       addr = grub_pci_make_address (dev, GRUB_PCI_REG_ADDRESS_REG0);
  95       grub_pci_write (addr, 0xf0000000 | GRUB_PCI_ADDR_MEM_PREFETCH
  96                       | GRUB_PCI_ADDR_SPACE_MEMORY | GRUB_PCI_ADDR_MEM_TYPE_32);
  97       addr = grub_pci_make_address (dev, GRUB_PCI_REG_ADDRESS_REG1);
  98       grub_pci_write (addr, 0xf2000000
  99                       | GRUB_PCI_ADDR_SPACE_MEMORY | GRUB_PCI_ADDR_MEM_TYPE_32);
 100
 101       addr = grub_pci_make_address (dev, GRUB_PCI_REG_COMMAND);
 102       grub_pci_write (addr, GRUB_PCI_COMMAND_MEM_ENABLED
 103                       | GRUB_PCI_COMMAND_IO_ENABLED);
 104
 105       return 1;
 106     }
 107
 108   grub_pci_iterate (find_card);
 109
 110   grub_outb (GRUB_VGA_IO_MISC_COLOR, GRUB_VGA_IO_MISC_WRITE);
 111
 112   load_font ();
 113
 114   grub_vga_gr_write (GRUB_VGA_GR_GR6_MMAP_CGA, GRUB_VGA_GR_GR6);
 115   grub_vga_gr_write (GRUB_VGA_GR_MODE_ODD_EVEN, GRUB_VGA_GR_MODE);
 116
 117   grub_vga_sr_write (GRUB_VGA_SR_MEMORY_MODE_NORMAL, GRUB_VGA_SR_MEMORY_MODE);
 118
 119   grub_vga_sr_write ((1 << GRUB_VGA_TEXT_TEXT_PLANE)
 120                      | (1 << GRUB_VGA_TEXT_ATTR_PLANE),
 121                      GRUB_VGA_SR_MAP_MASK_REGISTER);
 122
 123   grub_vga_cr_write (15, GRUB_VGA_CR_CELL_HEIGHT);
 124   grub_vga_cr_write (79, GRUB_VGA_CR_HORIZ_END);
 125   grub_vga_cr_write (40, GRUB_VGA_CR_PITCH);
 126
 127   int vert = 25 * 16;
 128   grub_vga_cr_write (vert & 0xff, GRUB_VGA_CR_VDISPLAY_END);
 129   grub_vga_cr_write (((vert >> GRUB_VGA_CR_OVERFLOW_HEIGHT1_SHIFT)
 130                       & GRUB_VGA_CR_OVERFLOW_HEIGHT1_MASK)
 131                      | ((vert >> GRUB_VGA_CR_OVERFLOW_HEIGHT2_SHIFT)
 132                         & GRUB_VGA_CR_OVERFLOW_HEIGHT2_MASK),
 133                      GRUB_VGA_CR_OVERFLOW);
 134
 135   load_palette ();
 136
 137   grub_vga_write_arx (GRUB_VGA_ARX_MODE_TEXT, GRUB_VGA_ARX_MODE);
 138   grub_vga_write_arx (0, GRUB_VGA_ARX_COLOR_SELECT);
 139
 140   grub_vga_sr_write (GRUB_VGA_SR_CLOCKING_MODE_8_DOT_CLOCK,
 141                      GRUB_VGA_SR_CLOCKING_MODE);
 142
 143   grub_vga_cr_write (14, GRUB_VGA_CR_CURSOR_START);
 144   grub_vga_cr_write (15, GRUB_VGA_CR_CURSOR_END);
 145
 146   grub_outb (0x20, 0x3c0);
 147 }