push ax ; First save AX - the start cluster of freeldr.sys
- ; Lets save the contents of the screen
- ; from B800:0000 to 9000:8000
- push ds
- mov ax,0b800h
- mov ds,ax
- xor si,si
- mov ax,9800h
- mov es,ax
- xor di,di
- mov cx,2000 ; Copy 2000 characters [words] (screen is 80x25)
- rep movsw ; 2 bytes a character (one is the attribute byte)
- pop ds
-
- mov ah,03h ; AH = 03h
- xor bx,bx ; BH = video page
- int 10h ; BIOS Int 10h Func 3 - Read Cursor Position and Size
- mov [es:di],dx ; DH = row, DL = column
-
; Display "Loading FreeLoader..." message
mov si,msgLoading ; Loading message
call PutChars ; Display it
FoundFile:
- ; Lets save the contents of the screen
- ; from B800:0000 to 9000:8000
- pushad
-
- mov ax,0b800h
- mov ds,ax
- xor si,si
- mov ax,9800h
- mov es,ax
- xor di,di
- mov cx,2000 ; Copy 2000 characters (screen is 80x25)
- rep movsw ; 2 bytes a character (one is the attribute byte)
-
- mov ah,03h ; AH = 03h
- xor bx,bx ; BH = video page
- int 10h ; BIOS Int 10h Func 3 - Read Cursor Position and Size
- mov [es:di],dx ; DH = row, DL = column
-
; Display "Loading FreeLoader..." message
mov si,msgLoading ; Loading message
call PutChars ; Display it
#OBJS = asmcode.a asmcode.o mb.o boot.o freeldr.o rtl.o fs.a fs.o fat.o \
# reactos.o tui.o menu.o miscboot.o options.o linux.o multiboot.o arcname.o \
# mem.o memory.o debug.o parseini.o registry.o import.o
-ASM_OBJS = asmcode.o mb.o boot.o mem.o
+#ASM_OBJS = asmcode.o mb.o boot.o mem.o
OBJS = freeldr.o miscboot.o options.o linux.o multiboot.o debug.o parseini.o oslist.o
-LIBS = rtl fs ui reactos comm disk mm cache
-LIB_FILES = rtl/rtl.a fs/fs.a ui/ui.a reactos/reactos.a comm/comm.a disk/disk.a mm/mm.a cache/cache.a
+LIBS = arch rtl fs ui reactos comm disk mm cache
+LIB_FILES = arch/arch.a rtl/rtl.a fs/fs.a ui/ui.a reactos/reactos.a
+LIB_FILES2 = comm/comm.a disk/disk.a mm/mm.a cache/cache.a
.PHONY : clean
all: freeldr.sys
-freeldr.sys: asmcode.a c_code.a
- $(LD) -N -Ttext=0x8000 --oformat=binary -s -o f.sys asmcode.a c_code.a
+freeldr.sys: c_code.a
+ $(LD) -N -Ttext=0x8000 --oformat=binary -s -o f.sys c_code.a
../bootsect/stubit ../bootsect/fatstub.bin f.sys freeldr.sys
freeldr.exe: asmcode.a c_code.a
$(LD) -o freeldr.exe asmcode.a c_code.a
-asmcode.a: $(ASM_OBJS)
- $(LD) -r -o asmcode.a $(ASM_OBJS)
+c_code.a: $(LIBS) c_code1.a c_code2.a
+ $(LD) -r -o c_code.a $(LIB_FILES) c_code1.a c_code2.a
-c_code.a: c_code1.a $(LIBS)
- $(LD) -r -o c_code.a c_code1.a $(LIB_FILES)
+c_code1.a: $(LIBS)
+ $(LD) -r -o c_code1.a $(LIB_FILES2)
-c_code1.a: $(OBJS)
- $(LD) -r -o c_code1.a $(OBJS)
+c_code2.a: $(OBJS)
+ $(LD) -r -o c_code2.a $(OBJS)
-asmcode.o: asmcode.S asmcode.h
- $(CC) $(FLAGS) -o asmcode.o -c asmcode.S
-
-mb.o: mb.S asmcode.h multiboot.h
- $(CC) $(FLAGS) -o mb.o -c mb.S
-
-boot.o: boot.S asmcode.h
- $(CC) $(FLAGS) -o boot.o -c boot.S
-
-mem.o: mem.S asmcode.h
- $(CC) $(FLAGS) -o mem.o -c mem.S
-
-freeldr.o: freeldr.c freeldr.h rtl.h fs.h reactos.h ui.h asmcode.h miscboot.h
+freeldr.o: freeldr.c freeldr.h rtl.h fs.h reactos.h ui.h arch.h miscboot.h
$(CC) $(FLAGS) -o freeldr.o -c freeldr.c
-miscboot.o: miscboot.c freeldr.h asmcode.h rtl.h fs.h ui.h miscboot.h
+miscboot.o: miscboot.c freeldr.h arch.h rtl.h fs.h ui.h miscboot.h
$(CC) $(FLAGS) -o miscboot.o -c miscboot.c
options.o: options.c freeldr.h rtl.h ui.h options.h
multiboot.o: multiboot.c freeldr.h rtl.h fs.h multiboot.h ui.h
$(CC) $(FLAGS) -o multiboot.o -c multiboot.c
-debug.o: debug.c debug.h Makefile
+debug.o: debug.c debug.h
$(CC) $(FLAGS) -o debug.o -c debug.c
-parseini.o: parseini.c parseini.h Makefile
+parseini.o: parseini.c parseini.h
$(CC) $(FLAGS) -o parseini.o -c parseini.c
-oslist.o: oslist.c oslist.h Makefile
+oslist.o: oslist.c oslist.h
$(CC) $(FLAGS) -o oslist.o -c oslist.c
+arch:
+ $(MAKE) -C arch
+
rtl:
$(MAKE) -C rtl
- $(RM) *.o
- $(RM) *.a
- $(RM) *.sys
+ $(MAKE) -C arch clean
$(MAKE) -C reactos clean
$(MAKE) -C comm clean
$(MAKE) -C disk clean
#define DISKREADBUFFER 0x90000 /* Buffer to store data read in from the disk via the BIOS */
-#define SCREENBUFFER 0x98000 /* The screen contents will be saved here */
-#define SCREENXCOORD 0x98FA0 /* Address of the byte that contains the current column of the cursor */
-#define SCREENYCOORD 0x98FA1 /* Address of the byte that contains the current row of the cursor */
-
/* Makes "x" a global variable or label */
#define EXTERN(x) .global x; x:
--- /dev/null
+#
+# FreeLoader
+# Copyright (C) 1998-2002 Brian Palmer <brianp@sginet.com>
+#
+# This program 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 2 of the License, or
+# (at your option) any later version.
+#
+# This program 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 this program; if not, write to the Free Software
+# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+#
+
+include ../rules.mk
+
+TARGET = i386
+
+.PHONY : clean
+
+all: arch.a
+
+arch.a:
+ $(MAKE) -C $(TARGET)
+
+clean:
+ - $(RM) *.a
+ $(MAKE) -C $(TARGET) clean
--- /dev/null
+#
+# FreeLoader
+# Copyright (C) 1998-2002 Brian Palmer <brianp@sginet.com>
+#
+# This program 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 2 of the License, or
+# (at your option) any later version.
+#
+# This program 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 this program; if not, write to the Free Software
+# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+#
+
+include ../../rules.mk
+
+OBJS = arch.o boot.o mb.o mem.o disk.o
+
+.PHONY : clean
+
+all: arch.a
+
+arch.a: $(OBJS)
+ $(LD) -r -o arch.a $(OBJS)
+ - $(RM) ..\arch.a
+ $(CP) arch.a ..\arch.a
+
+arch.o: arch.S
+ $(CC) $(FLAGS) -o arch.o -c arch.S
+
+boot.o: boot.S
+ $(CC) $(FLAGS) -o boot.o -c boot.S
+
+mb.o: mb.S
+ $(CC) $(FLAGS) -o mb.o -c mb.S
+
+mem.o: mem.S
+ $(CC) $(FLAGS) -o mem.o -c mem.S
+
+disk.o: disk.S
+ $(CC) $(FLAGS) -o disk.o -c disk.S
+
+clean:
+ - $(RM) *.o
+ - $(RM) *.a
.code16
#define ASM
-#include "asmcode.h"
+#include "arch.h"
EXTERN(start)
pop %ebp
ret
-/*
- * BOOL BiosInt13Read(ULONG Drive, ULONG Head, ULONG Track, ULONG Sector, ULONG SectorCount, PVOID Buffer);
- */
-_biosdisk_drive:
- .long 0
-_biosdisk_head:
- .long 0
-_biosdisk_track:
- .long 0
-_biosdisk_sector:
- .long 0
-_biosdisk_nsects:
- .long 0
-_biosdisk_buffer:
- .long 0
-_biosdisk_retval:
- .long 0
-_biosdisk_retrycount:
- .byte 0
-_biosdisk_error_code:
- .byte 0
-EXTERN(_BiosInt13Read)
- .code32
-
- push %ebp
- push %esi
- push %edi
- push %ebx
- push %ecx
- push %edx
-
- /* Get parameters */
- movl 0x1c(%esp),%eax
- movl %eax,_biosdisk_drive
- movl 0x20(%esp),%eax
- movl %eax,_biosdisk_head
- movl 0x24(%esp),%eax
- movl %eax,_biosdisk_track
- movl 0x28(%esp),%eax
- movl %eax,_biosdisk_sector
- movl 0x2c(%esp),%eax
- movl %eax,_biosdisk_nsects
- movl 0x30(%esp),%eax
- movl %eax,_biosdisk_buffer
-
- call switch_to_real
-
- .code16
- pushw %es // Save this just in case
- movb $3,_biosdisk_retrycount // Set the retry count to 3
-
-_biosdisk_read:
- movl _biosdisk_buffer,%eax // Get buffer address in eax
- shrl $4,%eax // Make linear address into segment
- movw %ax,%es // Load ES with segment
- movl _biosdisk_buffer,%ebx // and BX with offset
- andl $0x0f,%ebx // so that data gets loaded to [ES:BX]
- movb _biosdisk_sector,%cl // Get the sector in CL
- movw _biosdisk_track,%ax // Cylinder in AX
- movb %al,%ch // Now put it in CH
- rorb $1,%ah // Low 8 bits of cylinder in CH, high 2 bits
- rorb $1,%ah // in CL shifted to bits 6 & 7
- andb $0xc0,%ah // Clear out low six bits
- orb %ah,%cl // Or with sector number
- movb _biosdisk_head,%dh // Get the head
- movb _biosdisk_drive,%dl // Get the drive
- movb $2,%ah // BIOS int 0x13, function 2 - Read Disk Sectors
- movb _biosdisk_nsects,%al // Number of sectors to read
- int $0x13 // Read a sector
-
- // I have recently learned that not all bioses return
- // the sector read count in the AL register (at least mine doesn't)
- // even if the sectors were read correctly. So instead
- // of checking the sector read count we will rely solely
- // on the carry flag being set on error
-
- //jmp _biosdisk_done
- //cmpb _biosdisk_nsects,%al // See how many sectors we actually read
- //jne _biosdisk_error // Jump if no error
-
- movb $1,%al // Set the return value to be one (will be set to zero later if needed)
- jc _biosdisk_error // Jump if error (CF = 1 on error)
- jmp _biosdisk_done
-
-
-_biosdisk_error:
- movb %ah,_biosdisk_error_code// Save the error code
-
- cmpb $0x11,%ah // Check and see if it was a corrected ECC error
- je _biosdisk_done // If so then the data is still good, if not fail
-
- movb _biosdisk_retrycount,%al// Get the current retry count
- decb %al // Decrement it
- movb %al,_biosdisk_retrycount// Save it
- cmpb $0,%al // Is it zero?
- jz _biosdisk_zero // Yes, return zero
-
- movb $0,%ah // BIOS int 0x13, function 0 - Reset Disk System
- movb _biosdisk_drive,%dl // Get the drive
- int $0x13 // Reset the disk system
- jmp _biosdisk_read // Try reading again
-
-_biosdisk_zero:
- movb $0,%al // We will return zero
-
-_biosdisk_done:
- movzbl %al,%eax // Put the number of sectors read into EAX
- movl %eax,_biosdisk_retval // Save it as the return value
-
- popw %es // Restore ES
- call switch_to_prot
-
- .code32
-
- movl _biosdisk_retval,%eax // Get return value
- //movl $1,%eax
-
- pop %edx
- pop %ecx
- pop %ebx
- pop %edi
- pop %esi
- pop %ebp
- ret
-
-/*
- * BOOL BiosInt13ReadExtended(ULONG Drive, ULONG Sector, ULONG SectorCount, PVOID Buffer);
- */
-_disk_address_packet:
-_packet_size:
- .byte 0x10
-_packet_reserved:
- .byte 0
-_packet_sector_count:
- .word 0
-_packet_transfer_buffer_segment:
- .word 0
-_packet_transfer_buffer_offset:
- .word 0
-_packet_lba_sector_number:
- .quad 0
-_packet_64bit_flat_address:
- .quad 0
-_int13_extended_drive:
- .long 0
-_int13_extended_sector_count:
- .long 0
-_int13_extended_retval:
- .long 0
-_int13_extended_retrycount:
- .byte 0
-EXTERN(_BiosInt13ReadExtended)
- .code32
-
- push %ebp
- push %esi
- push %edi
- push %ebx
- push %ecx
- push %edx
-
- /* Get parameters */
- movl 0x1c(%esp),%eax
- movl %eax,_int13_extended_drive
- movl 0x20(%esp),%eax
- movl %eax,_packet_lba_sector_number
- movl 0x24(%esp),%eax
- movw %ax,_packet_sector_count
- movl %eax,_int13_extended_sector_count
- movl 0x28(%esp),%eax // Get buffer address in eax
- shrl $4,%eax // Make linear address into segment
- movw %ax,_packet_transfer_buffer_segment // Save segment
- movl 0x28(%esp),%eax // Get buffer address in eax
- andl $0x0f,%eax // Make linear address into offset
- movw %ax,_packet_transfer_buffer_offset // Save offset
-
- call switch_to_real
-
- .code16
- pushw %es // Save this just in case
- movb $3,_int13_extended_retrycount // Set the retry count to 3
-
-_int13_extended_read:
- movb _int13_extended_drive,%dl // Get the drive
- movb $42,%ah // BIOS int 0x13, function 42h - IBM/MS INT 13 Extensions - EXTENDED READ
- movw $_disk_address_packet,%si // DS:SI -> disk address packet
- int $0x13 // Read sectors
-
- movb $1,%al // Set the return value to be one (will be set to zero later if needed)
- jc _int13_extended_error // Jump if error (CF = 1 on error)
-
- movl _int13_extended_sector_count,%eax // Get the sector count in eax
- cmpw _packet_sector_count,%ax // See how many sectors we actually read (returned in disk address packet sector count)
- jne _int13_extended_error // Jump if not equal
-
- jmp _int13_extended_done
-
-
-_int13_extended_error:
- movb %ah,_biosdisk_error_code // Save the error code
-
- cmpb $0x11,%ah // Check and see if it was a corrected ECC error
- je _int13_extended_done // If so then the data is still good, if not fail
-
- movb _int13_extended_retrycount,%al // Get the current retry count
- decb %al // Decrement it
- movb %al,_int13_extended_retrycount // Save it
- cmpb $0,%al // Is it zero?
- jz _int13_extended_zero // Yes, return zero
-
- movb $0,%ah // BIOS int 0x13, function 0 - Reset Disk System
- movb _int13_extended_drive,%dl // Get the drive
- int $0x13 // Reset the disk system
- jmp _int13_extended_read // Try reading again
-
-_int13_extended_zero:
- movb $0,%al // We will return zero
-
-_int13_extended_done:
- movzbl %al,%eax // Put the number of sectors read into EAX
- movl %eax,_int13_extended_retval // Save it as the return value
-
- popw %es // Restore ES
- call switch_to_prot
-
- .code32
-
- movl _int13_extended_retval,%eax // Get return value
- //movl $1,%eax
-
- pop %edx
- pop %ecx
- pop %ebx
- pop %edi
- pop %esi
- pop %ebp
- ret
-
-/*
- * BOOL BiosInt13ExtensionsSupported(ULONG Drive);
- */
-_int13_extension_check_drive:
- .long 0
-_int13_extension_check_retval:
- .long 0
-EXTERN(_BiosInt13ExtensionsSupported)
- .code32
-
- push %ebp
- push %esi
- push %edi
- push %ebx
- push %ecx
- push %edx
-
- /* Get parameters */
- movl 0x1c(%esp),%eax
- movl %eax,_int13_extension_check_drive
-
- call switch_to_real
-
- .code16
- // Now make sure this computer supports extended reads
- movb $0x41,%ah // AH = 41h
- movw $0x55aa,%bx // BX = 55AAh
- movb _int13_extension_check_drive,%dl // DL = drive (80h-FFh)
- int $0x13 // IBM/MS INT 13 Extensions - INSTALLATION CHECK
- jc _int13_extension_check_error // CF set on error (extensions not supported)
- cmpw $0x55aa,%bx // BX = AA55h if installed
- jne _int13_extension_check_error
- testb $1,%cl // CX = API subset support bitmap
- jz _int13_extension_check_error // Bit 0, extended disk access functions (AH=42h-44h,47h,48h) supported
-
- // If we get here then we passed all the int13 extension tests
- movl $1,_int13_extension_check_retval // Set return value to TRUE
- jmp _int13_extension_check_done
-
-_int13_extension_check_error:
-
- movl $0,_int13_extension_check_retval // The tests failed so return FALSE
-
-_int13_extension_check_done:
-
- call switch_to_prot
-
- .code32
-
- movl _int13_extension_check_retval,%eax // Get return value
-
- pop %edx
- pop %ecx
- pop %ebx
- pop %edi
- pop %esi
- pop %ebp
- ret
-
-/*
- * ULONG BiosInt13GetLastErrorCode(VOID);
- */
-EXTERN(_BiosInt13GetLastErrorCode)
- .code32
-
- movzbl _biosdisk_error_code,%eax // Get return value
-
- ret
/*
* int getyear(void);
pop %ebp
ret
-/*
- * void stop_floppy(void);
- *
- * Stops the floppy drive from spinning, so that other software is
- * jumped to with a known state.
- */
-EXTERN(_stop_floppy)
- .code32
-
- push %eax
- push %edx
-
- call switch_to_real
-
- .code16
-
- movw $0x3F2, %dx
- xorb %al, %al
- outb %al, %dx
-
- call switch_to_prot
-
- .code32
-
- pop %edx
- pop %eax
- ret
-
-/*
- * int get_heads(int drive);
- */
-EXTERN(_get_heads)
- .code32
-
- push %ebx
- push %ecx
- push %edx
- push %edi
- push %es
-
- /* Get drive */
- movl 0x18(%esp),%eax
- movl %eax,_biosdisk_drive
-
- call switch_to_real
-
- .code16
-
- movb $0x08,%ah
- movb _biosdisk_drive,%dl
- int $0x13
- jc _get_heads_error
-
- incb %dh
- movzbl %dh,%edx
- movl %edx,_biosdisk_retval
- jmp _get_heads_done
-
-_get_heads_error:
- movl $0xff,_biosdisk_retval
-
-_get_heads_done:
-
- call switch_to_prot
-
- .code32
-
- movl _biosdisk_retval,%eax // Get return value
-
- pop %es
- pop %edi
- pop %edx
- pop %ecx
- pop %ebx
-
- ret
-
-/*
- * int get_cylinders(int drive);
- */
-EXTERN(_get_cylinders)
- .code32
-
- push %ebx
- push %ecx
- push %edx
- push %edi
- push %es
-
- /* Get drive */
- movl 0x18(%esp),%eax
- movl %eax,_biosdisk_drive
-
- call switch_to_real
-
- .code16
-
- movb $0x08,%ah
- movb _biosdisk_drive,%dl
- int $0x13
- jc _get_cylinders_error
-
- xorl %edx,%edx
- andb $0xc0,%cl
- shrb $0x06,%cl
- movb %cl,%dh
- movb %ch,%dl
- incl %edx
- movl %edx,_biosdisk_retval
- jmp _get_cylinders_done
-
-_get_cylinders_error:
- movl $0xff,_biosdisk_retval
-
-_get_cylinders_done:
-
- call switch_to_prot
-
- .code32
-
- movl _biosdisk_retval,%eax // Get return value
-
- pop %es
- pop %edi
- pop %edx
- pop %ecx
- pop %ebx
-
- ret
-
-/*
- * int get_sectors(int drive);
- */
-EXTERN(_get_sectors)
- .code32
-
- push %ebx
- push %ecx
- push %edx
- push %edi
- push %es
-
- /* Get drive */
- movl 0x18(%esp),%eax
- movl %eax,_biosdisk_drive
-
- call switch_to_real
-
- .code16
-
- movb $0x08,%ah
- movb _biosdisk_drive,%dl
- int $0x13
- jc _get_sectors_error
-
- andb $0x3f,%cl
- movzbl %cl,%ecx
- movl %ecx,_biosdisk_retval
- jmp _get_sectors_done
-
-_get_sectors_error:
- movl $0xff,_biosdisk_retval
-
-_get_sectors_done:
-
- call switch_to_prot
-
- .code32
-
- movl _biosdisk_retval,%eax // Get return value
-
- pop %es
- pop %edi
- pop %edx
- pop %ecx
- pop %ebx
-
- ret
/*
.code16
#define ASM
-#include "asmcode.h"
+#include "arch.h"
#include "multiboot.h"
--- /dev/null
+/*
+ * FreeLoader
+ * Copyright (C) 1998-2002 Brian Palmer <brianp@sginet.com>
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+ .text
+ .code16
+
+#define ASM
+#include "arch.h"
+
+
+/*
+ * BOOL BiosInt13Read(ULONG Drive, ULONG Head, ULONG Track, ULONG Sector, ULONG SectorCount, PVOID Buffer);
+ */
+_biosdisk_drive:
+ .long 0
+_biosdisk_head:
+ .long 0
+_biosdisk_track:
+ .long 0
+_biosdisk_sector:
+ .long 0
+_biosdisk_nsects:
+ .long 0
+_biosdisk_buffer:
+ .long 0
+_biosdisk_retval:
+ .long 0
+_biosdisk_retrycount:
+ .byte 0
+_biosdisk_error_code:
+ .byte 0
+EXTERN(_BiosInt13Read)
+ .code32
+
+ push %ebp
+ push %esi
+ push %edi
+ push %ebx
+ push %ecx
+ push %edx
+
+ /* Get parameters */
+ movl 0x1c(%esp),%eax
+ movl %eax,_biosdisk_drive
+ movl 0x20(%esp),%eax
+ movl %eax,_biosdisk_head
+ movl 0x24(%esp),%eax
+ movl %eax,_biosdisk_track
+ movl 0x28(%esp),%eax
+ movl %eax,_biosdisk_sector
+ movl 0x2c(%esp),%eax
+ movl %eax,_biosdisk_nsects
+ movl 0x30(%esp),%eax
+ movl %eax,_biosdisk_buffer
+
+ call switch_to_real
+
+ .code16
+ pushw %es // Save this just in case
+ movb $3,_biosdisk_retrycount // Set the retry count to 3
+
+_biosdisk_read:
+ movl _biosdisk_buffer,%eax // Get buffer address in eax
+ shrl $4,%eax // Make linear address into segment
+ movw %ax,%es // Load ES with segment
+ movl _biosdisk_buffer,%ebx // and BX with offset
+ andl $0x0f,%ebx // so that data gets loaded to [ES:BX]
+ movb _biosdisk_sector,%cl // Get the sector in CL
+ movw _biosdisk_track,%ax // Cylinder in AX
+ movb %al,%ch // Now put it in CH
+ rorb $1,%ah // Low 8 bits of cylinder in CH, high 2 bits
+ rorb $1,%ah // in CL shifted to bits 6 & 7
+ andb $0xc0,%ah // Clear out low six bits
+ orb %ah,%cl // Or with sector number
+ movb _biosdisk_head,%dh // Get the head
+ movb _biosdisk_drive,%dl // Get the drive
+ movb $2,%ah // BIOS int 0x13, function 2 - Read Disk Sectors
+ movb _biosdisk_nsects,%al // Number of sectors to read
+ int $0x13 // Read a sector
+
+ // I have recently learned that not all bioses return
+ // the sector read count in the AL register (at least mine doesn't)
+ // even if the sectors were read correctly. So instead
+ // of checking the sector read count we will rely solely
+ // on the carry flag being set on error
+
+ //jmp _biosdisk_done
+ //cmpb _biosdisk_nsects,%al // See how many sectors we actually read
+ //jne _biosdisk_error // Jump if no error
+
+ movb $1,%al // Set the return value to be one (will be set to zero later if needed)
+ jc _biosdisk_error // Jump if error (CF = 1 on error)
+ jmp _biosdisk_done
+
+
+_biosdisk_error:
+ movb %ah,_biosdisk_error_code// Save the error code
+
+ cmpb $0x11,%ah // Check and see if it was a corrected ECC error
+ je _biosdisk_done // If so then the data is still good, if not fail
+
+ movb _biosdisk_retrycount,%al// Get the current retry count
+ decb %al // Decrement it
+ movb %al,_biosdisk_retrycount// Save it
+ cmpb $0,%al // Is it zero?
+ jz _biosdisk_zero // Yes, return zero
+
+ movb $0,%ah // BIOS int 0x13, function 0 - Reset Disk System
+ movb _biosdisk_drive,%dl // Get the drive
+ int $0x13 // Reset the disk system
+ jmp _biosdisk_read // Try reading again
+
+_biosdisk_zero:
+ movb $0,%al // We will return zero
+
+_biosdisk_done:
+ movzbl %al,%eax // Put the number of sectors read into EAX
+ movl %eax,_biosdisk_retval // Save it as the return value
+
+ popw %es // Restore ES
+ call switch_to_prot
+
+ .code32
+
+ movl _biosdisk_retval,%eax // Get return value
+ //movl $1,%eax
+
+ pop %edx
+ pop %ecx
+ pop %ebx
+ pop %edi
+ pop %esi
+ pop %ebp
+ ret
+
+/*
+ * BOOL BiosInt13ReadExtended(ULONG Drive, ULONG Sector, ULONG SectorCount, PVOID Buffer);
+ */
+_disk_address_packet:
+_packet_size:
+ .byte 0x10
+_packet_reserved:
+ .byte 0
+_packet_sector_count:
+ .word 0
+_packet_transfer_buffer_segment:
+ .word 0
+_packet_transfer_buffer_offset:
+ .word 0
+_packet_lba_sector_number:
+ .quad 0
+_packet_64bit_flat_address:
+ .quad 0
+_int13_extended_drive:
+ .long 0
+_int13_extended_sector_count:
+ .long 0
+_int13_extended_retval:
+ .long 0
+_int13_extended_retrycount:
+ .byte 0
+EXTERN(_BiosInt13ReadExtended)
+ .code32
+
+ push %ebp
+ push %esi
+ push %edi
+ push %ebx
+ push %ecx
+ push %edx
+
+ /* Get parameters */
+ movl 0x1c(%esp),%eax
+ movl %eax,_int13_extended_drive
+ movl 0x20(%esp),%eax
+ movl %eax,_packet_lba_sector_number
+ movl 0x24(%esp),%eax
+ movw %ax,_packet_sector_count
+ movl %eax,_int13_extended_sector_count
+ movl 0x28(%esp),%eax // Get buffer address in eax
+ shrl $4,%eax // Make linear address into segment
+ movw %ax,_packet_transfer_buffer_segment // Save segment
+ movl 0x28(%esp),%eax // Get buffer address in eax
+ andl $0x0f,%eax // Make linear address into offset
+ movw %ax,_packet_transfer_buffer_offset // Save offset
+
+ call switch_to_real
+
+ .code16
+ pushw %es // Save this just in case
+ movb $3,_int13_extended_retrycount // Set the retry count to 3
+
+_int13_extended_read:
+ movb _int13_extended_drive,%dl // Get the drive
+ movb $42,%ah // BIOS int 0x13, function 42h - IBM/MS INT 13 Extensions - EXTENDED READ
+ movw $_disk_address_packet,%si // DS:SI -> disk address packet
+ int $0x13 // Read sectors
+
+ movb $1,%al // Set the return value to be one (will be set to zero later if needed)
+ jc _int13_extended_error // Jump if error (CF = 1 on error)
+
+ movl _int13_extended_sector_count,%eax // Get the sector count in eax
+ cmpw _packet_sector_count,%ax // See how many sectors we actually read (returned in disk address packet sector count)
+ jne _int13_extended_error // Jump if not equal
+
+ jmp _int13_extended_done
+
+
+_int13_extended_error:
+ movb %ah,_biosdisk_error_code // Save the error code
+
+ cmpb $0x11,%ah // Check and see if it was a corrected ECC error
+ je _int13_extended_done // If so then the data is still good, if not fail
+
+ movb _int13_extended_retrycount,%al // Get the current retry count
+ decb %al // Decrement it
+ movb %al,_int13_extended_retrycount // Save it
+ cmpb $0,%al // Is it zero?
+ jz _int13_extended_zero // Yes, return zero
+
+ movb $0,%ah // BIOS int 0x13, function 0 - Reset Disk System
+ movb _int13_extended_drive,%dl // Get the drive
+ int $0x13 // Reset the disk system
+ jmp _int13_extended_read // Try reading again
+
+_int13_extended_zero:
+ movb $0,%al // We will return zero
+
+_int13_extended_done:
+ movzbl %al,%eax // Put the number of sectors read into EAX
+ movl %eax,_int13_extended_retval // Save it as the return value
+
+ popw %es // Restore ES
+ call switch_to_prot
+
+ .code32
+
+ movl _int13_extended_retval,%eax // Get return value
+ //movl $1,%eax
+
+ pop %edx
+ pop %ecx
+ pop %ebx
+ pop %edi
+ pop %esi
+ pop %ebp
+ ret
+
+/*
+ * BOOL BiosInt13ExtensionsSupported(ULONG Drive);
+ */
+_int13_extension_check_drive:
+ .long 0
+_int13_extension_check_retval:
+ .long 0
+EXTERN(_BiosInt13ExtensionsSupported)
+ .code32
+
+ push %ebp
+ push %esi
+ push %edi
+ push %ebx
+ push %ecx
+ push %edx
+
+ /* Get parameters */
+ movl 0x1c(%esp),%eax
+ movl %eax,_int13_extension_check_drive
+
+ call switch_to_real
+
+ .code16
+ // Now make sure this computer supports extended reads
+ movb $0x41,%ah // AH = 41h
+ movw $0x55aa,%bx // BX = 55AAh
+ movb _int13_extension_check_drive,%dl // DL = drive (80h-FFh)
+ int $0x13 // IBM/MS INT 13 Extensions - INSTALLATION CHECK
+ jc _int13_extension_check_error // CF set on error (extensions not supported)
+ cmpw $0x55aa,%bx // BX = AA55h if installed
+ jne _int13_extension_check_error
+ testb $1,%cl // CX = API subset support bitmap
+ jz _int13_extension_check_error // Bit 0, extended disk access functions (AH=42h-44h,47h,48h) supported
+
+ // If we get here then we passed all the int13 extension tests
+ movl $1,_int13_extension_check_retval // Set return value to TRUE
+ jmp _int13_extension_check_done
+
+_int13_extension_check_error:
+
+ movl $0,_int13_extension_check_retval // The tests failed so return FALSE
+
+_int13_extension_check_done:
+
+ call switch_to_prot
+
+ .code32
+
+ movl _int13_extension_check_retval,%eax // Get return value
+
+ pop %edx
+ pop %ecx
+ pop %ebx
+ pop %edi
+ pop %esi
+ pop %ebp
+ ret
+
+/*
+ * ULONG BiosInt13GetLastErrorCode(VOID);
+ */
+EXTERN(_BiosInt13GetLastErrorCode)
+ .code32
+
+ movzbl _biosdisk_error_code,%eax // Get return value
+
+ ret
+
+
+/*
+ * void stop_floppy(void);
+ *
+ * Stops the floppy drive from spinning, so that other software is
+ * jumped to with a known state.
+ */
+EXTERN(_stop_floppy)
+ .code32
+
+ push %eax
+ push %edx
+
+ call switch_to_real
+
+ .code16
+
+ movw $0x3F2, %dx
+ xorb %al, %al
+ outb %al, %dx
+
+ call switch_to_prot
+
+ .code32
+
+ pop %edx
+ pop %eax
+ ret
+
+/*
+ * int get_heads(int drive);
+ */
+EXTERN(_get_heads)
+ .code32
+
+ push %ebx
+ push %ecx
+ push %edx
+ push %edi
+ push %es
+
+ /* Get drive */
+ movl 0x18(%esp),%eax
+ movl %eax,_biosdisk_drive
+
+ call switch_to_real
+
+ .code16
+
+ movb $0x08,%ah
+ movb _biosdisk_drive,%dl
+ int $0x13
+ jc _get_heads_error
+
+ incb %dh
+ movzbl %dh,%edx
+ movl %edx,_biosdisk_retval
+ jmp _get_heads_done
+
+_get_heads_error:
+ movl $0xff,_biosdisk_retval
+
+_get_heads_done:
+
+ call switch_to_prot
+
+ .code32
+
+ movl _biosdisk_retval,%eax // Get return value
+
+ pop %es
+ pop %edi
+ pop %edx
+ pop %ecx
+ pop %ebx
+
+ ret
+
+/*
+ * int get_cylinders(int drive);
+ */
+EXTERN(_get_cylinders)
+ .code32
+
+ push %ebx
+ push %ecx
+ push %edx
+ push %edi
+ push %es
+
+ /* Get drive */
+ movl 0x18(%esp),%eax
+ movl %eax,_biosdisk_drive
+
+ call switch_to_real
+
+ .code16
+
+ movb $0x08,%ah
+ movb _biosdisk_drive,%dl
+ int $0x13
+ jc _get_cylinders_error
+
+ xorl %edx,%edx
+ andb $0xc0,%cl
+ shrb $0x06,%cl
+ movb %cl,%dh
+ movb %ch,%dl
+ incl %edx
+ movl %edx,_biosdisk_retval
+ jmp _get_cylinders_done
+
+_get_cylinders_error:
+ movl $0xff,_biosdisk_retval
+
+_get_cylinders_done:
+
+ call switch_to_prot
+
+ .code32
+
+ movl _biosdisk_retval,%eax // Get return value
+
+ pop %es
+ pop %edi
+ pop %edx
+ pop %ecx
+ pop %ebx
+
+ ret
+
+/*
+ * int get_sectors(int drive);
+ */
+EXTERN(_get_sectors)
+ .code32
+
+ push %ebx
+ push %ecx
+ push %edx
+ push %edi
+ push %es
+
+ /* Get drive */
+ movl 0x18(%esp),%eax
+ movl %eax,_biosdisk_drive
+
+ call switch_to_real
+
+ .code16
+
+ movb $0x08,%ah
+ movb _biosdisk_drive,%dl
+ int $0x13
+ jc _get_sectors_error
+
+ andb $0x3f,%cl
+ movzbl %cl,%ecx
+ movl %ecx,_biosdisk_retval
+ jmp _get_sectors_done
+
+_get_sectors_error:
+ movl $0xff,_biosdisk_retval
+
+_get_sectors_done:
+
+ call switch_to_prot
+
+ .code32
+
+ movl _biosdisk_retval,%eax // Get return value
+
+ pop %es
+ pop %edi
+ pop %edx
+ pop %ecx
+ pop %ebx
+
+ ret
+
+
+
.code16
#define ASM
-#include "asmcode.h"
+#include "arch.h"
#include "multiboot.h"
/*
.code16
#define ASM
-#include "asmcode.h"
+#include "arch.h"
#include "multiboot.h"
#include <disk.h>
#include <rtl.h>
#include <debug.h>
-#include <asmcode.h>
+#include <arch.h>
// Returns a pointer to a CACHE_BLOCK structure
// Adds the block to the cache manager block list
#include <fs.h>
#include <rtl.h>
#include <ui.h>
-#include <asmcode.h>
+#include <arch.h>
#include <debug.h>
#include "fs.h"
#include "reactos.h"
#include "ui.h"
-#include "asmcode.h"
+#include "arch.h"
#include "miscboot.h"
#include "linux.h"
#include "mm.h"
//ULONG BootDrive = 0; // BIOS boot drive, 0-A:, 1-B:, 0x80-C:, 0x81-D:, etc.
ULONG BootPartition = 0; // Boot Partition, 1-4
-PUCHAR ScreenBuffer = (PUCHAR)(SCREENBUFFER); // Save buffer for screen contents
-ULONG CursorXPos = 0; // Cursor's X Position
-ULONG CursorYPos = 0; // Cursor's Y Position
-
ULONG GetDefaultOperatingSystem(PUCHAR OperatingSystemList[], ULONG OperatingSystemCount);
LONG GetTimeOut(VOID);
enable_a20();
- CursorXPos = (ULONG) *((PUCHAR)(SCREENXCOORD));
- CursorYPos = (ULONG) *((PUCHAR)(SCREENYCOORD));
-
#ifdef DEBUG
DebugInit();
#endif
reboot:
- RestoreScreen(ScreenBuffer);
+ clrscr();
showcursor();
- gotoxy(CursorXPos, CursorYPos);
return;
}
extern ULONG BootPartition; // Boot Partition, 1-4
extern BOOL UserInterfaceUp; // Tells us if the user interface is displayed
-extern PUCHAR ScreenBuffer; // Save buffer for screen contents
-extern ULONG CursorXPos; // Cursor's X Position
-extern ULONG CursorYPos; // Cursor's Y Position
-
void BootMain(void);
#endif // defined __FREELDR_H
#include <disk.h>
#include <rtl.h>
#include <ui.h>
-#include <asmcode.h>
+#include <arch.h>
#include <mm.h>
#include <debug.h>
#include <cache.h>
#include <disk.h>
#include <rtl.h>
#include <ui.h>
-#include <asmcode.h>
+#include <arch.h>
#include <debug.h>
#include "freeldr.h"
-#include "asmcode.h"
+#include "arch.h"
#include "miscboot.h"
#include "rtl.h"
#include "fs.h"
#include "freeldr.h"
-#include "asmcode.h"
+#include "arch.h"
#include "miscboot.h"
#include "rtl.h"
#include "fs.h"
#include "freeldr.h"
-#include "asmcode.h"
+#include "arch.h"
#include "rtl.h"
#include "fs.h"
#include "multiboot.h"
*/
#include <freeldr.h>
-#include <asmcode.h>
+#include <arch.h>
#include <reactos.h>
#include <rtl.h>
#include <fs.h>
strcat(name, ".");
//MessageBox(name);
- RestoreScreen(ScreenBuffer);
-
/*
* Now boot the kernel
*/
MAKE = make
# For a release build uncomment this line
-FLAGS = -Wall -nostdlib -nostdinc -fno-builtin -I./ -I../ -O3
+FLAGS = -Wall -nostdlib -nostdinc -fno-builtin -I./ -I../ -I../../ -O3
# For a debug build uncomment this line
-#FLAGS = -Wall -nostdlib -nostdinc -fno-builtin -I./ -I../ -DDEBUG -O3
+#FLAGS = -Wall -nostdlib -nostdinc -fno-builtin -I./ -I../ -I../../ -DDEBUG -O3
projects / reactos.git / commitdiff