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Fixed the EXT2/3 boot sector code so that it only uses the boot drive in the boot sector if it exists (i.e. not 0xff)

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Otherwise it uses the boot drive passed in the DL register.
Updated the EXT2/3 installer to reflect the changes in the boot sector code for EXT2/3.

svn path=/trunk/; revision=4540
This commit is contained in:
Brian Palmer 2003-04-15 22:48:06 +00:00
parent b4d0aca25a
commit 273b6dd69f
3 changed files with 23 additions and 9 deletions
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20
freeldr/bootsect/ext2.asm
View file

@ -1,6 +1,6 @@
; EXT2.ASM
; EXT2 Boot Sector
; Copyright (c) 2002 Brian Palmer
; Copyright (c) 2002, 2003 Brian Palmer
; [bp-0x04] Here we will store the number of sectors per track
; [bp-0x08] Here we will store the number of heads
@ -62,8 +62,14 @@ main:
mov sp,7b00h ; Setup a stack
cmp BYTE [BYTE bp+BootDrive],BYTE 0xff ; If they have specified a boot drive then use it
jne GetDriveParameters
mov [BYTE bp+BootDrive],dl ; Save the boot drive
GetDriveParameters:
mov ax,0800h
mov ah,08h
mov dl,[BYTE bp+BootDrive] ; Get boot drive in dl
int 13h ; Request drive parameters from the bios
jnc CalcDriveSize ; If the call succeeded then calculate the drive size
@ -334,7 +340,9 @@ Done:
msgDiskError db 'Disk error',0
msgAnyKey db 'Press any key to restart',0
; Sorry, need the space...
;msgAnyKey db 'Press any key to restart',0
msgAnyKey db 'Press any key',0
times 509-($-$$) db 0 ; Pad to 509 bytes
@ -628,19 +636,19 @@ Ext2ReadDirectBlocksLoop:
; And reboots
PrintFileNotFound:
mov si,msgFreeLdr ; FreeLdr not found message
jmp short DisplayAndRebootIt
jmp short DisplayItAndReboot
; Displays a file size is 0 error
; And reboots
PrintFileSizeError:
mov si,msgFileSize ; Error message
jmp short DisplayAndRebootIt
jmp short DisplayItAndReboot
; Displays a file is not a regular file error
; And reboots
PrintRegFileError:
mov si,msgRegFile ; Error message
DisplayAndRebootIt:
DisplayItAndReboot:
call PutChars ; Display it
jmp Reboot

4
freeldr/install/linux/finstext2.c
View file

@ -111,8 +111,8 @@ int main(int argc, char *argv[])
printf("Cylinders: %d\n", Ext2DriveGeometry.cylinders);
printf("Start: %d\n", Ext2DriveGeometry.start);
Ext2BootCode->BootDrive = 0x80;
Ext2BootCode->BootPartition = 0x05;
Ext2BootCode->BootDrive = 0xff;
Ext2BootCode->BootPartition = 0x00;
//Ext2BootCode->SectorsPerTrack = Ext2DriveGeometry.sectors;
//Ext2BootCode->NumberOfHeads = Ext2DriveGeometry.heads;
Ext2BootCode->Ext2VolumeStartSector = Ext2DriveGeometry.start;

8
freeldr/install/linux/finstext2.h
View file

@ -8,7 +8,7 @@ typedef struct
{
unsigned char JmpBoot[3];
unsigned char BootDrive;
unsigned char BootPartition;
//unsigned char BootPartition;
//unsigned char SectorsPerTrack;
//unsigned short NumberOfHeads;
//unsigned long Reserved1;
@ -22,6 +22,12 @@ typedef struct
unsigned long Ext2FirstDataBlock; // First data block (1 for 1024-byte blocks, 0 for bigger sizes)
unsigned long Ext2InodesPerGroup; // Number of inodes per group
unsigned long Ext2InodesPerBlock; // Number of inodes per block
unsigned char BootCodeAndData[459];
unsigned char BootPartition;
unsigned short BootSignature;
} PACKED EXT2_BOOTCODE, *PEXT2_BOOTCODE;