From 8c5886df17cdfb148d4e17bddf38143ed65fe674 Mon Sep 17 00:00:00 2001
From: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
Date: Thu, 28 Jun 2012 15:27:54 +0200
Subject: [PATCH 001/482] Add monochrome text support (mda_text, aka
`hercules' in grub-legacy).
* grub-core/Makefile.core.def (mda_text): New module.
* grub-core/lib/legacy_parse.c (grub_legacy_parse): Support `hercules'.
* grub-core/term/i386/vga_common.c (grub_console_cur_color): Moved to ..
* grub-core/term/i386/pc/vga_text.c (cur_color): ... here
* grub-core/term/i386/pc/console.c (grub_console_cur_color): ... and
here.
* grub-core/term/i386/vga_common.c (grub_console_getwh): Moved to ..
* grub-core/term/i386/pc/vga_text.c (grub_console_getwh): ... here
* grub-core/term/i386/pc/console.c (grub_console_getwh): ... and
here.
* grub-core/term/i386/vga_common.c (grub_console_setcolorstate): Moved
to ..
* grub-core/term/i386/pc/vga_text.c (grub_console_setcolorstate):
... here
* grub-core/term/i386/pc/console.c (grub_console_setcolorstate): ... and
here.
* grub-core/term/i386/vga_common.c: Removed.
* include/grub/i386/vga_common.h: Likewise.
* include/grub/vga.h (grub_vga_cr_bw_write): New function.
(grub_vga_cr_bw_read): Likewise.
* include/grub/vgaregs.h (GRUB_VGA_IO_CR_BW_INDEX): New enum value.
(GRUB_VGA_IO_CR_BW_DATA): Likewise.
* grub-core/term/i386/pc/vga_text.c [MODE_MDA]: Call
grub_vga_cr_bw_read/grub_vga_cr_bw_write instead of
grub_vga_cr_read/grub_vga_cr_write.
(grub_vga_text_setcolorstate) [MODE_MDA]: Ignore color.
---
ChangeLog | 31 +++++++++
grub-core/Makefile.core.def | 12 ++--
grub-core/lib/legacy_parse.c | 15 ++--
grub-core/term/i386/pc/console.c | 27 ++++++++
grub-core/term/i386/pc/vga_text.c | 141 +++++++++++++++++++++++++++++++++-----
grub-core/term/i386/vga_common.c | 48 -------------
include/grub/i386/pc/console.h | 1 -
include/grub/i386/vga_common.h | 32 ---------
include/grub/vga.h | 14 ++++
include/grub/vgaregs.h | 2 +
10 files changed, 213 insertions(+), 110 deletions(-)
delete mode 100644 grub-core/term/i386/vga_common.c
delete mode 100644 include/grub/i386/vga_common.h
diff --git a/ChangeLog b/ChangeLog
index 81bdae9..f6e864a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,34 @@
+2012-06-28 Vladimir Serbinenko <phcoder@gmail.com>
+
+ Add monochrome text support (mda_text, aka `hercules' in grub-legacy).
+
+ * grub-core/Makefile.core.def (mda_text): New module.
+ * grub-core/lib/legacy_parse.c (grub_legacy_parse): Support `hercules'.
+ * grub-core/term/i386/vga_common.c (grub_console_cur_color): Moved to ..
+ * grub-core/term/i386/pc/vga_text.c (cur_color): ... here
+ * grub-core/term/i386/pc/console.c (grub_console_cur_color): ... and
+ here.
+ * grub-core/term/i386/vga_common.c (grub_console_getwh): Moved to ..
+ * grub-core/term/i386/pc/vga_text.c (grub_console_getwh): ... here
+ * grub-core/term/i386/pc/console.c (grub_console_getwh): ... and
+ here.
+ * grub-core/term/i386/vga_common.c (grub_console_setcolorstate): Moved
+ to ..
+ * grub-core/term/i386/pc/vga_text.c (grub_console_setcolorstate):
+ ... here
+ * grub-core/term/i386/pc/console.c (grub_console_setcolorstate): ... and
+ here.
+ * grub-core/term/i386/vga_common.c: Removed.
+ * include/grub/i386/vga_common.h: Likewise.
+ * include/grub/vga.h (grub_vga_cr_bw_write): New function.
+ (grub_vga_cr_bw_read): Likewise.
+ * include/grub/vgaregs.h (GRUB_VGA_IO_CR_BW_INDEX): New enum value.
+ (GRUB_VGA_IO_CR_BW_DATA): Likewise.
+ * grub-core/term/i386/pc/vga_text.c [MODE_MDA]: Call
+ grub_vga_cr_bw_read/grub_vga_cr_bw_write instead of
+ grub_vga_cr_read/grub_vga_cr_write.
+ (grub_vga_text_setcolorstate) [MODE_MDA]: Ignore color.
+
2012-06-27 Vladimir Serbinenko <phcoder@gmail.com>
* configure.ac: Bump version to 2.00.
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index 39e77a4..5c2fcc2 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -123,9 +123,6 @@ kernel = {
i386_coreboot_multiboot_qemu = kern/i386/coreboot/init.c;
i386_coreboot_multiboot_qemu = term/i386/pc/vga_text.c;
- i386_coreboot_multiboot_qemu = term/i386/vga_common.c;
- i386_pc = term/i386/vga_common.c;
-
x86 = kern/i386/pit.c;
efi = disk/efi/efidisk.c;
@@ -175,7 +172,6 @@ kernel = {
mips_qemu_mips = term/at_keyboard.c;
mips_qemu_mips = commands/keylayouts.c;
mips_qemu_mips = term/i386/pc/vga_text.c;
- mips_qemu_mips = term/i386/vga_common.c;
mips_qemu_mips = kern/vga_init.c;
mips_arc = kern/mips/arc/init.c;
@@ -1591,11 +1587,17 @@ module = {
module = {
name = vga_text;
common = term/i386/pc/vga_text.c;
- common = term/i386/vga_common.c;
enable = i386_pc;
};
module = {
+ name = mda_text;
+ common = term/i386/pc/mda_text.c;
+ enable = i386_pc;
+ enable = i386_coreboot_multiboot_qemu;
+};
+
+module = {
name = video_cirrus;
x86 = video/cirrus.c;
enable = x86;
diff --git a/grub-core/lib/legacy_parse.c b/grub-core/lib/legacy_parse.c
index 775eaad..14768b8 100644
--- a/grub-core/lib/legacy_parse.c
+++ b/grub-core/lib/legacy_parse.c
@@ -1,6 +1,6 @@
/*
* GRUB -- GRand Unified Bootloader
- * Copyright (C) 1999,2000,2001,2002,2003,2004,2010 Free Software Foundation, Inc.
+ * Copyright (C) 1999,2000,2001,2002,2003,2004,2010,2012 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
@@ -290,7 +290,7 @@ static struct legacy_command legacy_commands[] =
" default values are COM1, 9600, 8N1."},
/* FIXME: setkey unsupported. */ /* NUL_TERMINATE */
/* NOTE: setup unsupported. */
- /* FIXME: --no-echo, --no-edit, hercules unsupported. */
+ /* FIXME: --no-echo, --no-edit unsupported. */
/* NOTE: both terminals are activated so --silent and --timeout
are useless. */
{"terminal", NULL, NULL, 0, 0, {}, FLAG_TERMINAL | FLAG_IGNORE_REST,
@@ -507,8 +507,8 @@ grub_legacy_parse (const char *buf, char **entryname, char **suffix)
int dumb = 0, lines = 24;
#ifdef TODO
int no_echo = 0, no_edit = 0;
- int hercules = 0;
#endif
+ int hercules = 0;
int console = 0, serial = 0;
/* Big enough for any possible resulting command. */
char outbuf[256] = "";
@@ -541,10 +541,8 @@ grub_legacy_parse (const char *buf, char **entryname, char **suffix)
if (grub_memcmp (ptr, "serial", sizeof ("serial") - 1) == 0)
serial = 1;
-#ifdef TODO
if (grub_memcmp (ptr, "hercules", sizeof ("hercules") - 1) == 0)
hercules = 1;
-#endif
while (*ptr && !grub_isspace (*ptr))
ptr++;
while (*ptr && grub_isspace (*ptr))
@@ -561,7 +559,7 @@ grub_legacy_parse (const char *buf, char **entryname, char **suffix)
grub_strcpy (outptr, "serial ");
outptr += grub_strlen (outptr);
}
- if (console)
+ if (console || hercules)
{
grub_strcpy (outptr, "console ");
outptr += grub_strlen (outptr);
@@ -578,6 +576,11 @@ grub_legacy_parse (const char *buf, char **entryname, char **suffix)
grub_strcpy (outptr, "console ");
outptr += grub_strlen (outptr);
}
+ if (hercules)
+ {
+ grub_strcpy (outptr, "mda_text ");
+ outptr += grub_strlen (outptr);
+ }
grub_strcpy (outptr, "; ");
outptr += grub_strlen (outptr);
if (serial)
diff --git a/grub-core/term/i386/pc/console.c b/grub-core/term/i386/pc/console.c
index 7cf5ffc..a681435 100644
--- a/grub-core/term/i386/pc/console.c
+++ b/grub-core/term/i386/pc/console.c
@@ -22,6 +22,8 @@
#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)
{
@@ -250,6 +252,31 @@ grub_console_getkeystatus (struct grub_term_input *term __attribute__ ((unused))
return bios_data_area->keyboard_flag_lower & ~0x80;
}
+static grub_uint16_t
+grub_console_getwh (struct grub_term_output *term __attribute__ ((unused)))
+{
+ return (80 << 8) | 25;
+}
+
+static void
+grub_console_setcolorstate (struct grub_term_output *term,
+ 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 = term->normal_color & 0x7f;
+ break;
+ case GRUB_TERM_COLOR_HIGHLIGHT:
+ grub_console_cur_color = term->highlight_color & 0x7f;
+ break;
+ default:
+ break;
+ }
+}
+
static struct grub_term_input grub_console_term_input =
{
.name = "console",
diff --git a/grub-core/term/i386/pc/vga_text.c b/grub-core/term/i386/pc/vga_text.c
index c934c68..d1e4ef9 100644
--- a/grub-core/term/i386/pc/vga_text.c
+++ b/grub-core/term/i386/pc/vga_text.c
@@ -17,10 +17,17 @@
*/
#include <grub/dl.h>
-#include <grub/i386/vga_common.h>
#include <grub/cpu/io.h>
#include <grub/types.h>
#include <grub/vga.h>
+#include <grub/term.h>
+
+/* MODESET is used for testing to force monochrome or colour mode.
+ You shouldn't use mda_text on vga.
+ */
+#ifdef MODESET
+#include <grub/machine/int.h>
+#endif
#if defined (GRUB_MACHINE_COREBOOT) || defined (GRUB_MACHINE_QEMU) || defined (GRUB_MACHINE_MIPS_QEMU_MIPS) || defined (GRUB_MACHINE_MULTIBOOT)
#include <grub/machine/console.h>
@@ -35,10 +42,21 @@ static int grub_curr_x, grub_curr_y;
#ifdef __mips__
#define VGA_TEXT_SCREEN ((grub_uint16_t *) 0xb00b8000)
+#define cr_read grub_vga_cr_read
+#define cr_write grub_vga_cr_write
+#elif defined (MODE_MDA)
+#define VGA_TEXT_SCREEN ((grub_uint16_t *) 0xb0000)
+#define cr_read grub_vga_cr_bw_read
+#define cr_write grub_vga_cr_bw_write
+static grub_uint8_t cur_color;
#else
#define VGA_TEXT_SCREEN ((grub_uint16_t *) 0xb8000)
+#define cr_read grub_vga_cr_read
+#define cr_write grub_vga_cr_write
#endif
+static grub_uint8_t cur_color = 0x7;
+
static void
screen_write_char (int x, int y, short c)
{
@@ -55,8 +73,8 @@ static void
update_cursor (void)
{
unsigned int pos = grub_curr_y * COLS + grub_curr_x;
- grub_vga_cr_write (pos >> 8, GRUB_VGA_CR_CURSOR_ADDR_HIGH);
- grub_vga_cr_write (pos & 0xFF, GRUB_VGA_CR_CURSOR_ADDR_LOW);
+ cr_write (pos >> 8, GRUB_VGA_CR_CURSOR_ADDR_HIGH);
+ cr_write (pos & 0xFF, GRUB_VGA_CR_CURSOR_ADDR_LOW);
}
static void
@@ -72,7 +90,7 @@ inc_y (void)
for (x = 0; x < COLS; x++)
screen_write_char (x, y, screen_read_char (x, y + 1));
for (x = 0; x < COLS; x++)
- screen_write_char (x, ROWS - 1, ' ' | (grub_console_cur_color << 8));
+ screen_write_char (x, ROWS - 1, ' ' | (cur_color << 8));
}
}
@@ -103,7 +121,7 @@ grub_vga_text_putchar (struct grub_term_output *term __attribute__ ((unused)),
break;
default:
screen_write_char (grub_curr_x, grub_curr_y,
- c->base | (grub_console_cur_color << 8));
+ c->base | (cur_color << 8));
inc_x ();
}
@@ -130,7 +148,7 @@ grub_vga_text_cls (struct grub_term_output *term)
{
int i;
for (i = 0; i < ROWS * COLS; i++)
- VGA_TEXT_SCREEN[i] = grub_cpu_to_le16 (' ' | (grub_console_cur_color << 8));
+ VGA_TEXT_SCREEN[i] = grub_cpu_to_le16 (' ' | (cur_color << 8));
grub_vga_text_gotoxy (term, 0, 0);
}
@@ -139,49 +157,136 @@ grub_vga_text_setcursor (struct grub_term_output *term __attribute__ ((unused)),
int on)
{
grub_uint8_t old;
- old = grub_vga_cr_read (GRUB_VGA_CR_CURSOR_START);
+ old = cr_read (GRUB_VGA_CR_CURSOR_START);
if (on)
- grub_vga_cr_write (old & ~GRUB_VGA_CR_CURSOR_START_DISABLE,
- GRUB_VGA_CR_CURSOR_START);
+ cr_write (old & ~GRUB_VGA_CR_CURSOR_START_DISABLE,
+ GRUB_VGA_CR_CURSOR_START);
else
- grub_vga_cr_write (old | GRUB_VGA_CR_CURSOR_START_DISABLE,
- GRUB_VGA_CR_CURSOR_START);
+ cr_write (old | GRUB_VGA_CR_CURSOR_START_DISABLE,
+ GRUB_VGA_CR_CURSOR_START);
}
static grub_err_t
-grub_vga_text_init_fini (struct grub_term_output *term)
+grub_vga_text_init (struct grub_term_output *term)
{
+#ifdef MODESET
+ struct grub_bios_int_registers regs;
+ regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
+
+#ifdef MODE_MDA
+ regs.eax = 7;
+#else
+ regs.eax = 3;
+#endif
+ regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
+ grub_bios_interrupt (0x10, ®s);
+#endif
grub_vga_text_cls (term);
return 0;
}
+static grub_err_t
+grub_vga_text_fini (struct grub_term_output *term)
+{
+#ifdef MODESET
+ struct grub_bios_int_registers regs;
+ regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
+
+ regs.eax = 3;
+ regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
+ grub_bios_interrupt (0x10, ®s);
+#endif
+ grub_vga_text_cls (term);
+ return 0;
+}
+
+static grub_uint16_t
+grub_vga_text_getwh (struct grub_term_output *term __attribute__ ((unused)))
+{
+ return (80 << 8) | 25;
+}
+
+#ifndef MODE_MDA
+
+static void
+grub_vga_text_setcolorstate (struct grub_term_output *term,
+ grub_term_color_state state)
+{
+ switch (state) {
+ case GRUB_TERM_COLOR_STANDARD:
+ cur_color = GRUB_TERM_DEFAULT_STANDARD_COLOR & 0x7f;
+ break;
+ case GRUB_TERM_COLOR_NORMAL:
+ cur_color = term->normal_color & 0x7f;
+ break;
+ case GRUB_TERM_COLOR_HIGHLIGHT:
+ cur_color = term->highlight_color & 0x7f;
+ break;
+ default:
+ break;
+ }
+}
+
+#else
+static void
+grub_vga_text_setcolorstate (struct grub_term_output *term __attribute__ ((unused)),
+ grub_term_color_state state)
+{
+ switch (state) {
+ case GRUB_TERM_COLOR_STANDARD:
+ cur_color = 0x07;
+ break;
+ case GRUB_TERM_COLOR_NORMAL:
+ cur_color = 0x07;
+ break;
+ case GRUB_TERM_COLOR_HIGHLIGHT:
+ cur_color = 0x70;
+ break;
+ default:
+ break;
+ }
+}
+#endif
+
static struct grub_term_output grub_vga_text_term =
{
+#ifdef MODE_MDA
+ .name = "mda_text",
+#else
.name = "vga_text",
- .init = grub_vga_text_init_fini,
- .fini = grub_vga_text_init_fini,
+#endif
+ .init = grub_vga_text_init,
+ .fini = grub_vga_text_fini,
.putchar = grub_vga_text_putchar,
- .getwh = grub_console_getwh,
+ .getwh = grub_vga_text_getwh,
.getxy = grub_vga_text_getxy,
.gotoxy = grub_vga_text_gotoxy,
.cls = grub_vga_text_cls,
- .setcolorstate = grub_console_setcolorstate,
+ .setcolorstate = grub_vga_text_setcolorstate,
.setcursor = grub_vga_text_setcursor,
.flags = GRUB_TERM_CODE_TYPE_CP437,
.normal_color = GRUB_TERM_DEFAULT_NORMAL_COLOR,
.highlight_color = GRUB_TERM_DEFAULT_HIGHLIGHT_COLOR,
};
-#if defined (GRUB_MACHINE_COREBOOT) || defined (GRUB_MACHINE_QEMU) || defined (GRUB_MACHINE_MIPS_QEMU_MIPS) || defined (GRUB_MACHINE_MULTIBOOT)
+#ifdef MODE_MDA
+GRUB_MOD_INIT(mda_text)
+#elif defined (GRUB_MACHINE_COREBOOT) || defined (GRUB_MACHINE_QEMU) || defined (GRUB_MACHINE_MIPS_QEMU_MIPS) || defined (GRUB_MACHINE_MULTIBOOT)
void grub_vga_text_init (void)
#else
GRUB_MOD_INIT(vga_text)
#endif
{
+#ifdef MODE_MDA
+ grub_term_register_output ("mda_text", &grub_vga_text_term);
+#else
grub_term_register_output ("vga_text", &grub_vga_text_term);
+#endif
}
-#if defined (GRUB_MACHINE_COREBOOT) || defined (GRUB_MACHINE_QEMU) || defined (GRUB_MACHINE_MIPS_QEMU_MIPS) || defined (GRUB_MACHINE_MULTIBOOT)
+#ifdef MODE_MDA
+GRUB_MOD_FINI(mda_text)
+#elif defined (GRUB_MACHINE_COREBOOT) || defined (GRUB_MACHINE_QEMU) || defined (GRUB_MACHINE_MIPS_QEMU_MIPS) || defined (GRUB_MACHINE_MULTIBOOT)
void grub_vga_text_fini (void)
#else
GRUB_MOD_FINI(vga_text)
diff --git a/grub-core/term/i386/vga_common.c b/grub-core/term/i386/vga_common.c
deleted file mode 100644
index 0c21769..0000000
--- a/grub-core/term/i386/vga_common.c
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * GRUB -- GRand Unified Bootloader
- * Copyright (C) 2002,2003,2005,2007,2008 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/i386/vga_common.h>
-#include <grub/term.h>
-#include <grub/types.h>
-
-grub_uint8_t grub_console_cur_color = 0x7;
-
-grub_uint16_t
-grub_console_getwh (struct grub_term_output *term __attribute__ ((unused)))
-{
- return (80 << 8) | 25;
-}
-
-void
-grub_console_setcolorstate (struct grub_term_output *term,
- 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 = term->normal_color & 0x7f;
- break;
- case GRUB_TERM_COLOR_HIGHLIGHT:
- grub_console_cur_color = term->highlight_color & 0x7f;
- break;
- default:
- break;
- }
-}
diff --git a/include/grub/i386/pc/console.h b/include/grub/i386/pc/console.h
index f752b9a..191964f 100644
--- a/include/grub/i386/pc/console.h
+++ b/include/grub/i386/pc/console.h
@@ -24,7 +24,6 @@
#include <grub/types.h>
#include <grub/symbol.h>
#include <grub/term.h>
-#include <grub/i386/vga_common.h>
/* Initialize the console system. */
void grub_console_init (void);
diff --git a/include/grub/i386/vga_common.h b/include/grub/i386/vga_common.h
deleted file mode 100644
index 8727903..0000000
--- a/include/grub/i386/vga_common.h
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * GRUB -- GRand Unified Bootloader
- * Copyright (C) 2002,2005,2007,2008 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/>.
- */
-
-#ifndef GRUB_VGA_COMMON_CPU_HEADER
-#define GRUB_VGA_COMMON_CPU_HEADER 1
-
-#include <grub/types.h>
-#include <grub/symbol.h>
-#include <grub/term.h>
-
-extern grub_uint8_t grub_console_cur_color;
-
-grub_uint16_t grub_console_getwh (struct grub_term_output *term);
-void grub_console_setcolorstate (struct grub_term_output *term,
- grub_term_color_state state);
-
-#endif /* ! GRUB_VGA_COMMON_CPU_HEADER */
diff --git a/include/grub/vga.h b/include/grub/vga.h
index 81d40a1..1d8449c 100644
--- a/include/grub/vga.h
+++ b/include/grub/vga.h
@@ -57,6 +57,20 @@ grub_vga_cr_read (grub_uint8_t addr)
}
static inline void
+grub_vga_cr_bw_write (grub_uint8_t val, grub_uint8_t addr)
+{
+ grub_outb (addr, GRUB_MACHINE_PCI_IO_BASE + GRUB_VGA_IO_CR_BW_INDEX);
+ grub_outb (val, GRUB_MACHINE_PCI_IO_BASE + GRUB_VGA_IO_CR_BW_DATA);
+}
+
+static inline grub_uint8_t
+grub_vga_cr_bw_read (grub_uint8_t addr)
+{
+ grub_outb (addr, GRUB_MACHINE_PCI_IO_BASE + GRUB_VGA_IO_CR_BW_INDEX);
+ return grub_inb (GRUB_MACHINE_PCI_IO_BASE + GRUB_VGA_IO_CR_BW_DATA);
+}
+
+static inline void
grub_vga_sr_write (grub_uint8_t val, grub_uint8_t addr)
{
grub_outb (addr, GRUB_MACHINE_PCI_IO_BASE + GRUB_VGA_IO_SR_INDEX);
diff --git a/include/grub/vgaregs.h b/include/grub/vgaregs.h
index a7b13ee..1a666a1 100644
--- a/include/grub/vgaregs.h
+++ b/include/grub/vgaregs.h
@@ -26,6 +26,8 @@
enum
{
+ GRUB_VGA_IO_CR_BW_INDEX = 0x3b4,
+ GRUB_VGA_IO_CR_BW_DATA = 0x3b5,
GRUB_VGA_IO_ARX = 0x3c0,
GRUB_VGA_IO_ARX_READ = 0x3c1,
GRUB_VGA_IO_MISC_WRITE = 0x3c2,
--
1.8.2.1