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change the format of drive info in the Multiboot Specification, implement some of the new features.

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okuji 2000-10-15 21:18:14 +00:00
parent 636299cc50
commit 11236082ea
9 changed files with 277 additions and 89 deletions
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5
docs/grub-install.8
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@ -22,8 +22,11 @@ instead of the root directory.
use FILE as the grub shell.
.TP
\fB\-\-force\-lba\fR
Force GRUB to use LBA mode even for a buggy
force GRUB to use LBA mode even for a buggy
BIOS.
.TP
\fB\-\-recheck\fR
probe a device map even if it already exists.
.PP
INSTALL_DEVICE can be a GRUB device name or a system device filename.
.PP

44
docs/multiboot.texi
View file

@ -71,7 +71,7 @@ into another language, under the above conditions for modified versions.
@top Multiboot Specification
This file documents Multiboot Specification, the proposal for the boot
sequence standard. This edition documents version 0.6.90.
sequence standard. This edition documents version 0.6.91.
@end ifnottex
@ -567,7 +567,7 @@ follows:
44 | mmap_length | (present if flags[6] is set)
48 | mmap_addr | (present if flags[6] is set)
+-------------------+
52 | drives_count | (present if flags[7] is set)
52 | drives_length | (present if flags[7] is set)
56 | drives_addr | (present if flags[7] is set)
+-------------------+
60 | config_table | (present if flags[8] is set)
@ -765,29 +765,33 @@ be available for normal use.
If bit 7 in the @samp{flags} is set, then the @samp{drives_*} fields
are valid, and indicate the address of the physical address of the first
drive structure and the number of drive structures. @samp{drives_addr}
is the address, and @samp{drives_count} is the
number. @samp{drives_count} may be zero. Each drive structure is
formatted as follows:
drive structure and the size of drive structures. @samp{drives_addr}
is the address, and @samp{drives_length} is the total size of drive
structures. Note that @samp{drives_length} may be zero. Each drive
structure is formatted as follows:
@example
@group
+-------------------+
0 | drive_number |
0 | size |
+-------------------+
1 | drive_mode |
4 | drive_number |
+-------------------+
2 | drive_cylinders |
4 | drive_heads |
5 | drive_sectors |
5 | drive_mode |
+-------------------+
6 | drive_ports |
6 | drive_cylinders |
8 | drive_heads |
9 | drive_sectors |
+-------------------+
10 | reserved (0) |
10 - xx | drive_ports |
+-------------------+
@end group
@end example
The @samp{size} field specifies the size of this structure. The size
varies, depending on the number of ports. Note that the size may not be
equal to (10 + 2 * the number of ports), because of an alignment.
The @samp{drive_number} field contains the BIOS drive number. The
@samp{drive_mode} field represents the access mode used by the boot
loader. Currently, the following modes are defined:
@ -807,15 +811,11 @@ cylinders. @samp{drive_heads} contains the number of the
heads. @samp{drive_sectors} contains the number of the sectors per
track.
The @samp{drive_ports} field contains the physical address of the array
of the I/O ports used for the drive in the @sc{bios} code. The array
consists of zero or more unsigned two-bytes integers, and is terminated
with zero. Note that the array may contain any number of I/O ports that
are not related to the drive actually (such as @sc{dma} controller's
ports).
The last field @samp{reserved} is reserved for future use, and must be
zero. The size is four bytes.
The @samp{drive_ports} field contains the array of the I/O ports used
for the drive in the @sc{bios} code. The array consists of zero or more
unsigned two-bytes integers, and is terminated with zero. Note that the
array may contain any number of I/O ports that are not related to the
drive actually (such as @sc{dma} controller's ports).
If bit 8 in the @samp{flags} is set, then the @samp{config_table} field
is valid, and indicates the address of the @sc{rom} configuration table