Adding upstream version 2.06.upstream/2.06upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 310 insertions, 0 deletions

diff --git a/grub-core/term/i386/pc/console.c b/grub-core/term/i386/pc/console.c
new file mode 100644
index 0000000..f6142a2
--- /dev/null
+++ b/grub-core/term/i386/pc/console.c
@@ -0,0 +1,310 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2002,2003,2005,2007,2008,2009  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/machine/memory.h>
+#include <grub/machine/console.h>
+#include <grub/term.h>
+#include <grub/types.h>
+#include <grub/machine/int.h>
+
+static grub_uint8_t grub_console_cur_color = 0x7;
+
+static void
+int10_9 (grub_uint8_t ch, grub_uint16_t n)
+{
+  struct grub_bios_int_registers regs;
+
+  regs.eax = ch | 0x0900;
+  regs.ebx = grub_console_cur_color & 0xff;
+  regs.ecx = n;
+  regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;  
+  grub_bios_interrupt (0x10, &regs);
+}
+
+/*
+ * BIOS call "INT 10H Function 03h" to get cursor position
+ *	Call with	%ah = 0x03
+ *			%bh = page
+ *      Returns         %ch = starting scan line
+ *                      %cl = ending scan line
+ *                      %dh = row (0 is top)
+ *                      %dl = column (0 is left)
+ */
+
+
+static struct grub_term_coordinate
+grub_console_getxy (struct grub_term_output *term __attribute__ ((unused)))
+{
+  struct grub_bios_int_registers regs;
+
+  regs.eax = 0x0300;
+  regs.ebx = 0;
+  regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;  
+  grub_bios_interrupt (0x10, &regs);
+
+  return (struct grub_term_coordinate) {
+    (regs.edx & 0xff), ((regs.edx & 0xff00) >> 8) };
+}
+
+/*
+ * BIOS call "INT 10H Function 02h" to set cursor position
+ *	Call with	%ah = 0x02
+ *			%bh = page
+ *                      %dh = row (0 is top)
+ *                      %dl = column (0 is left)
+ */
+static void
+grub_console_gotoxy (struct grub_term_output *term __attribute__ ((unused)),
+		     struct grub_term_coordinate pos)
+{
+  struct grub_bios_int_registers regs;
+
+  /* set page to 0 */
+  regs.ebx = 0;
+  regs.eax = 0x0200;
+  regs.edx = (pos.y << 8) | pos.x;
+  regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;  
+  grub_bios_interrupt (0x10, &regs);
+}
+
+/*
+ *
+ * Put the character C on the console. Because GRUB wants to write a
+ * character with an attribute, this implementation is a bit tricky.
+ * If C is a control character (CR, LF, BEL, BS), use INT 10, AH = 0Eh
+ * (TELETYPE OUTPUT). Otherwise, use INT 10, AH = 9 to write character
+ * with attributes and advance cursor. If we are on the last column,
+ * let BIOS to wrap line correctly.
+ */
+static void
+grub_console_putchar_real (grub_uint8_t c)
+{
+  struct grub_bios_int_registers regs;
+  struct grub_term_coordinate pos;
+
+  if (c == 7 || c == 8 || c == 0xa || c == 0xd)
+    {
+      regs.eax = c | 0x0e00;
+      regs.ebx = 0x0001;
+      regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;  
+      grub_bios_interrupt (0x10, &regs);
+      return;
+    }
+
+  /* get the current position */
+  pos = grub_console_getxy (NULL);
+  
+  /* write the character with the attribute */
+  int10_9 (c, 1);
+
+  /* check the column with the width */
+  if (pos.x >= 79)
+    {
+      grub_console_putchar_real (0x0d);
+      grub_console_putchar_real (0x0a);
+    }
+  else
+    grub_console_gotoxy (NULL, (struct grub_term_coordinate) { pos.x + 1,
+	  pos.y });
+}
+
+static void
+grub_console_putchar (struct grub_term_output *term __attribute__ ((unused)),
+		      const struct grub_unicode_glyph *c)
+{
+  grub_console_putchar_real (c->base);
+}
+
+/*
+ * BIOS call "INT 10H Function 09h" to write character and attribute
+ *	Call with	%ah = 0x09
+ *                      %al = (character)
+ *                      %bh = (page number)
+ *                      %bl = (attribute)
+ *                      %cx = (number of times)
+ */
+static void
+grub_console_cls (struct grub_term_output *term)
+{
+  /* move the cursor to the beginning */
+  grub_console_gotoxy (term, (struct grub_term_coordinate) { 0, 0 });
+
+  /* write spaces to the entire screen */
+  int10_9 (' ', 80 * 25);
+
+  /* move back the cursor */
+  grub_console_gotoxy (term, (struct grub_term_coordinate) { 0, 0 });
+}
+
+/*
+ * void grub_console_setcursor (int on)
+ * BIOS call "INT 10H Function 01h" to set cursor type
+ *      Call with       %ah = 0x01
+ *                      %ch = cursor starting scanline
+ *                      %cl = cursor ending scanline
+ */
+static void 
+grub_console_setcursor (struct grub_term_output *term __attribute__ ((unused)),
+			int on)
+{
+  static grub_uint16_t console_cursor_shape = 0;
+  struct grub_bios_int_registers regs;
+
+  /* check if the standard cursor shape has already been saved */
+  if (!console_cursor_shape)
+    {
+      regs.eax = 0x0300;
+      regs.ebx = 0;
+      regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;  
+      grub_bios_interrupt (0x10, &regs);
+      console_cursor_shape = regs.ecx;
+      if ((console_cursor_shape >> 8) >= (console_cursor_shape & 0xff))
+	console_cursor_shape = 0x0d0e;
+    }
+  /* set %cx to the designated cursor shape */
+  regs.ecx = on ? console_cursor_shape : 0x2000;
+  regs.eax = 0x0100;
+  regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;  
+  grub_bios_interrupt (0x10, &regs);
+}
+
+/*
+ *	if there is a character pending, return it; otherwise return -1
+ * BIOS call "INT 16H Function 01H" to check whether a character is pending
+ *	Call with	%ah = 0x1
+ *	Return:
+ *		If key waiting to be input:
+ *			%ah = keyboard scan code
+ *			%al = ASCII character
+ *			Zero flag = clear
+ *		else
+ *			Zero flag = set
+ * BIOS call "INT 16H Function 00H" to read character from keyboard
+ *	Call with	%ah = 0x0
+ *	Return:		%ah = keyboard scan code
+ *			%al = ASCII character
+ */
+
+static int
+grub_console_getkey (struct grub_term_input *term __attribute__ ((unused)))
+{
+  const grub_uint16_t bypass_table[] = {
+    0x0100 | GRUB_TERM_ESC, 0x0f00 | GRUB_TERM_TAB, 0x0e00 | GRUB_TERM_BACKSPACE, 0x1c00 | '\r', 0x1c00 | '\n'
+  };
+  struct grub_bios_int_registers regs;
+  unsigned i;
+
+  /*
+   * Due to a bug in apple's bootcamp implementation, INT 16/AH = 0 would
+   * cause the machine to hang at the second keystroke. However, we can
+   * work around this problem by ensuring the presence of keystroke with
+   * INT 16/AH = 1 before calling INT 16/AH = 0.
+   */
+
+  regs.eax = 0x0100;
+  regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
+  grub_bios_interrupt (0x16, &regs);
+  if (regs.flags & GRUB_CPU_INT_FLAGS_ZERO)
+    return GRUB_TERM_NO_KEY;
+
+  regs.eax = 0x0000;
+  regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
+  grub_bios_interrupt (0x16, &regs);
+  if (!(regs.eax & 0xff))
+    return ((regs.eax >> 8) & 0xff) | GRUB_TERM_EXTENDED;
+
+  if ((regs.eax & 0xff) >= ' ')
+    return regs.eax & 0xff;
+
+  for (i = 0; i < ARRAY_SIZE (bypass_table); i++)
+    if (bypass_table[i] == (regs.eax & 0xffff))
+      return regs.eax & 0xff;
+
+  return (regs.eax & 0xff) + (('a' - 1) | GRUB_TERM_CTRL);
+}
+
+static const struct grub_machine_bios_data_area *bios_data_area =
+  (struct grub_machine_bios_data_area *) GRUB_MEMORY_MACHINE_BIOS_DATA_AREA_ADDR;
+
+static int
+grub_console_getkeystatus (struct grub_term_input *term __attribute__ ((unused)))
+{
+  /* conveniently GRUB keystatus is modelled after BIOS one.  */
+  return bios_data_area->keyboard_flag_lower & ~0x80;
+}
+
+static struct grub_term_coordinate
+grub_console_getwh (struct grub_term_output *term __attribute__ ((unused)))
+{
+  return (struct grub_term_coordinate) { 80, 25 };
+}
+
+static void
+grub_console_setcolorstate (struct grub_term_output *term
+			    __attribute__ ((unused)),
+			    grub_term_color_state state)
+{
+  switch (state) {
+    case GRUB_TERM_COLOR_STANDARD:
+      grub_console_cur_color = GRUB_TERM_DEFAULT_STANDARD_COLOR & 0x7f;
+      break;
+    case GRUB_TERM_COLOR_NORMAL:
+      grub_console_cur_color = grub_term_normal_color & 0x7f;
+      break;
+    case GRUB_TERM_COLOR_HIGHLIGHT:
+      grub_console_cur_color = grub_term_highlight_color & 0x7f;
+      break;
+    default:
+      break;
+  }
+}
+
+static struct grub_term_input grub_console_term_input =
+  {
+    .name = "console",
+    .getkey = grub_console_getkey,
+    .getkeystatus = grub_console_getkeystatus
+  };
+
+static struct grub_term_output grub_console_term_output =
+  {
+    .name = "console",
+    .putchar = grub_console_putchar,
+    .getwh = grub_console_getwh,
+    .getxy = grub_console_getxy,
+    .gotoxy = grub_console_gotoxy,
+    .cls = grub_console_cls,
+    .setcolorstate = grub_console_setcolorstate,
+    .setcursor = grub_console_setcursor,
+    .flags = GRUB_TERM_CODE_TYPE_CP437,
+    .progress_update_divisor = GRUB_PROGRESS_FAST
+  };
+
+void
+grub_console_init (void)
+{
+  grub_term_register_output ("console", &grub_console_term_output);
+  grub_term_register_input ("console", &grub_console_term_input);
+}
+
+void
+grub_console_fini (void)
+{
+  grub_term_unregister_input (&grub_console_term_input);
+  grub_term_unregister_output (&grub_console_term_output);
+}