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2008-03-24 Bean <bean123ch@gmail.com>

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* disk/i386/pc/biosdisk.c (cd_start): Removed.
	(cd_count): Removed.
	(cd_drive): New variable.
	(grub_biosdisk_get_drive): Don't check for (cdN) device.
	(grub_biosdisk_call_hook): Likewise.
	(grub_biosdisk_iterate): Change cdrom detection method.
	(grub_biosdisk_open): Replace cd_start with cd_drive.
	(GRUB_MOD_INIT): Use grub_biosdisk_get_cdinfo_int13_extension to
	detect cdrom device.

	* include/grub/i386/pc/biosdisk.h (GRUB_BIOSDISK_MACHINE_CDROM_START):
	Removed.
	(GRUB_BIOSDISK_MACHINE_CDROM_END): Removed.
	(GRUB_BIOSDISK_CDTYPE_NO_EMUL): New macro.
	(GRUB_BIOSDISK_CDTYPE_1_2_M): Likewise.
	(GRUB_BIOSDISK_CDTYPE_1_44_M): Likewise.
	(GRUB_BIOSDISK_CDTYPE_2_88_M): Likewise.
	(GRUB_BIOSDISK_CDTYPE_HARDDISK): Likewise.
	(GRUB_BIOSDISK_CDTYPE_MASK): Likewise.
	(grub_biosdisk_cdrp): New structure.
	(grub_biosdisk_get_cdinfo_int13_extensions): New function.

	* include/grub/i386/pc/kernel.h (grub_boot_drive): Export this variable.

	* kern/i386/pc/init.c (make_install_device): Don't use (cdN) as root
	device.

	* kern/i386/pc/startup.S (grub_biosdisk_get_cdinfo_int13_extensions):
	New function.
This commit is contained in:
bean 2008-03-24 04:13:37 +00:00
parent 68e7fc7aa8
commit bf962df2da
6 changed files with 95 additions and 44 deletions
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32
ChangeLog
View file

@ -1,3 +1,35 @@
2008-03-24 Bean <bean123ch@gmail.com>
* disk/i386/pc/biosdisk.c (cd_start): Removed.
(cd_count): Removed.
(cd_drive): New variable.
(grub_biosdisk_get_drive): Don't check for (cdN) device.
(grub_biosdisk_call_hook): Likewise.
(grub_biosdisk_iterate): Change cdrom detection method.
(grub_biosdisk_open): Replace cd_start with cd_drive.
(GRUB_MOD_INIT): Use grub_biosdisk_get_cdinfo_int13_extension to
detect cdrom device.
* include/grub/i386/pc/biosdisk.h (GRUB_BIOSDISK_MACHINE_CDROM_START):
Removed.
(GRUB_BIOSDISK_MACHINE_CDROM_END): Removed.
(GRUB_BIOSDISK_CDTYPE_NO_EMUL): New macro.
(GRUB_BIOSDISK_CDTYPE_1_2_M): Likewise.
(GRUB_BIOSDISK_CDTYPE_1_44_M): Likewise.
(GRUB_BIOSDISK_CDTYPE_2_88_M): Likewise.
(GRUB_BIOSDISK_CDTYPE_HARDDISK): Likewise.
(GRUB_BIOSDISK_CDTYPE_MASK): Likewise.
(grub_biosdisk_cdrp): New structure.
(grub_biosdisk_get_cdinfo_int13_extensions): New function.
* include/grub/i386/pc/kernel.h (grub_boot_drive): Export this variable.
* kern/i386/pc/init.c (make_install_device): Don't use (cdN) as root
device.
* kern/i386/pc/startup.S (grub_biosdisk_get_cdinfo_int13_extensions):
New function.
2008-03-20 Robert Millan <rmh@aybabtu.com>
Remove 2 TiB limit in ata.mod.

52
disk/i386/pc/biosdisk.c
View file

@ -18,6 +18,7 @@
#include <grub/machine/biosdisk.h>
#include <grub/machine/memory.h>
#include <grub/machine/kernel.h>
#include <grub/disk.h>
#include <grub/dl.h>
#include <grub/mm.h>
@ -26,15 +27,14 @@
#include <grub/err.h>
#include <grub/term.h>
static int cd_start = GRUB_BIOSDISK_MACHINE_CDROM_START;
static int cd_count = 0;
int cd_drive = 0;
static int
grub_biosdisk_get_drive (const char *name)
{
unsigned long drive;
if ((name[0] != 'f' && name[0] != 'h' && name[0] != 'c') || name[1] != 'd')
if ((name[0] != 'f' && name[0] != 'h') || name[1] != 'd')
goto fail;
drive = grub_strtoul (name + 2, 0, 10);
@ -43,8 +43,6 @@ grub_biosdisk_get_drive (const char *name)
if (name[0] == 'h')
drive += 0x80;
else if (name[0] == 'c')
drive += cd_start;
return (int) drive ;
@ -58,9 +56,6 @@ grub_biosdisk_call_hook (int (*hook) (const char *name), int drive)
{
char name[10];
if (drive >= cd_start)
grub_sprintf (name, "cd%d", drive - cd_start);
else
grub_sprintf (name, (drive & 0x80) ? "hd%d" : "fd%d", drive & (~0x80));
return hook (name);
}
@ -91,9 +86,11 @@ grub_biosdisk_iterate (int (*hook) (const char *name))
return 1;
}
for (drive = cd_start; drive < cd_start + cd_count; drive++)
if (grub_biosdisk_call_hook (hook, drive))
if (cd_drive)
{
if (grub_biosdisk_call_hook (hook, cd_drive))
return 1;
}
return 0;
}
@ -109,7 +106,7 @@ grub_biosdisk_open (const char *name, grub_disk_t disk)
if (drive < 0)
return grub_errno;
disk->has_partitions = ((drive & 0x80) && (drive < cd_start));
disk->has_partitions = ((drive & 0x80) && (drive != cd_drive));
disk->id = drive;
data = (struct grub_biosdisk_data *) grub_malloc (sizeof (*data));
@ -119,7 +116,7 @@ grub_biosdisk_open (const char *name, grub_disk_t disk)
data->drive = drive;
data->flags = 0;
if (drive >= cd_start)
if ((cd_drive) && (drive == cd_drive))
{
data->flags = GRUB_BIOSDISK_FLAG_LBA | GRUB_BIOSDISK_FLAG_CDROM;
data->sectors = 32;
@ -154,7 +151,7 @@ grub_biosdisk_open (const char *name, grub_disk_t disk)
}
}
if (drive < cd_start)
if (! (data->flags & GRUB_BIOSDISK_FLAG_CDROM))
{
if (grub_biosdisk_get_diskinfo_standard (drive,
&data->cylinders,
@ -364,7 +361,8 @@ grub_disk_biosdisk_fini (void)
GRUB_MOD_INIT(biosdisk)
{
int drive, found = 0;
struct grub_biosdisk_cdrp *cdrp
= (struct grub_biosdisk_cdrp *) GRUB_MEMORY_MACHINE_SCRATCH_ADDR;
if (grub_disk_firmware_is_tainted)
{
@ -373,25 +371,15 @@ GRUB_MOD_INIT(biosdisk)
}
grub_disk_firmware_fini = grub_disk_biosdisk_fini;
grub_memset (cdrp, 0, sizeof (*cdrp));
cdrp->size = sizeof (*cdrp);
cdrp->media_type = 0xFF;
if ((! grub_biosdisk_get_cdinfo_int13_extensions (grub_boot_drive, cdrp)) &&
((cdrp->media_type & GRUB_BIOSDISK_CDTYPE_MASK)
== GRUB_BIOSDISK_CDTYPE_NO_EMUL))
cd_drive = cdrp->drive_no;
grub_disk_dev_register (&grub_biosdisk_dev);
for (drive = GRUB_BIOSDISK_MACHINE_CDROM_START;
drive < GRUB_BIOSDISK_MACHINE_CDROM_END; drive++)
{
if (grub_biosdisk_check_int13_extensions (drive))
{
if (! found)
cd_start = drive;
found++;
}
else
{
if (found)
break;
}
}
cd_count = found;
}
GRUB_MOD_FINI(biosdisk)

28
include/grub/i386/pc/biosdisk.h
View file

@ -25,8 +25,13 @@
#define GRUB_BIOSDISK_FLAG_LBA 1
#define GRUB_BIOSDISK_FLAG_CDROM 2
#define GRUB_BIOSDISK_MACHINE_CDROM_START 0xe0
#define GRUB_BIOSDISK_MACHINE_CDROM_END 0xf0
#define GRUB_BIOSDISK_CDTYPE_NO_EMUL 0
#define GRUB_BIOSDISK_CDTYPE_1_2_M 1
#define GRUB_BIOSDISK_CDTYPE_1_44_M 2
#define GRUB_BIOSDISK_CDTYPE_2_88_M 3
#define GRUB_BIOSDISK_CDTYPE_HARDDISK 4
#define GRUB_BIOSDISK_CDTYPE_MASK 0xF
struct grub_biosdisk_data
{
@ -74,6 +79,23 @@ struct grub_biosdisk_drp
grub_uint8_t dummy[16];
} __attribute__ ((packed));
struct grub_biosdisk_cdrp
{
grub_uint8_t size;
grub_uint8_t media_type;
grub_uint8_t drive_no;
grub_uint8_t controller_no;
grub_uint32_t image_lba;
grub_uint16_t device_spec;
grub_uint16_t cache_seg;
grub_uint16_t load_seg;
grub_uint16_t length_sec512;
grub_uint8_t cylinders;
grub_uint8_t sectors;
grub_uint8_t heads;
grub_uint8_t dummy[16];
} __attribute__ ((packed));
/* Disk Address Packet. */
struct grub_biosdisk_dap
{
@ -90,6 +112,8 @@ int EXPORT_FUNC(grub_biosdisk_rw_standard) (int ah, int drive, int coff, int hof
int EXPORT_FUNC(grub_biosdisk_check_int13_extensions) (int drive);
int EXPORT_FUNC(grub_biosdisk_get_diskinfo_int13_extensions) (int drive,
void *drp);
int EXPORT_FUNC(grub_biosdisk_get_cdinfo_int13_extensions) (int drive,
void *cdrp);
int EXPORT_FUNC(grub_biosdisk_get_diskinfo_standard) (int drive,
unsigned long *cylinders,
unsigned long *heads,

2
include/grub/i386/pc/kernel.h
View file

@ -71,7 +71,7 @@ extern grub_int32_t grub_memdisk_image_size;
extern char grub_prefix[];
/* The boot BIOS drive number. */
extern grub_int32_t grub_boot_drive;
extern grub_int32_t EXPORT_VAR(grub_boot_drive);
/* The root BIOS drive number. */
extern grub_int32_t grub_root_drive;

10
kern/i386/pc/init.c
View file

@ -22,7 +22,6 @@
#include <grub/machine/memory.h>
#include <grub/machine/console.h>
#include <grub/machine/kernel.h>
#include <grub/machine/biosdisk.h>
#include <grub/types.h>
#include <grub/err.h>
#include <grub/dl.h>
@ -77,13 +76,8 @@ make_install_device (void)
if (grub_root_drive == 0xFF)
grub_root_drive = grub_boot_drive;
if (grub_root_drive >= GRUB_BIOSDISK_MACHINE_CDROM_START)
grub_sprintf (dev, "(cd%u",
grub_root_drive - GRUB_BIOSDISK_MACHINE_CDROM_START);
else
grub_sprintf (dev, "(%cd%u",
(grub_root_drive & 0x80) ? 'h' : 'f',
grub_root_drive & 0x7f);
grub_sprintf (dev, "(%cd%u", (grub_root_drive & 0x80) ? 'h' : 'f',
grub_root_drive & 0x7f);
if (grub_install_dos_part >= 0)
grub_sprintf (dev + grub_strlen (dev), ",%u", grub_install_dos_part + 1);

15
kern/i386/pc/startup.S
View file

@ -779,6 +779,17 @@ FUNCTION(grub_biosdisk_check_int13_extensions)
ret
/*
* int grub_biosdisk_get_cdinfo_int13_extensions (int drive, void *cdrp)
*
* Return the cdrom information of DRIVE in CDRP. If an error occurs,
* then return non-zero, otherwise zero.
*/
FUNCTION(grub_biosdisk_get_cdinfo_int13_extensions)
movw $0x4B01, %cx
jmp 1f
/*
* int grub_biosdisk_get_diskinfo_int13_extensions (int drive, void *drp)
*
@ -787,6 +798,8 @@ FUNCTION(grub_biosdisk_check_int13_extensions)
*/
FUNCTION(grub_biosdisk_get_diskinfo_int13_extensions)
movb $0x48, %ch
1:
pushl %ebp
pushl %ebx
pushl %esi
@ -802,7 +815,7 @@ FUNCTION(grub_biosdisk_get_diskinfo_int13_extensions)
call prot_to_real
.code16
movb $0x48, %ah
movw %cx, %ax
movw %bx, %ds
int $0x13 /* do the operation */
movb %ah, %bl /* save return value in %bl */