diff options
| author | gikidy <gikidy@6f19259b-4bc3-4df7-8a09-765794883524> | 2009-03-16 04:50:05 +0000 |
|---|---|---|
| committer | gikidy <gikidy@6f19259b-4bc3-4df7-8a09-765794883524> | 2009-03-16 04:50:05 +0000 |
| commit | ded312f134a0c5125f692531280a5917d28e8026 (patch) | |
| tree | e44aa66af9431d67d1c3bdafd8e0717349fe30c0 /DuetPkg/BootSector/start.S | |
| parent | 560b815e21ce215345e5be234203d97d9b3690fb (diff) | |
| download | edk2-platforms-ded312f134a0c5125f692531280a5917d28e8026.tar.xz | |
1. Add start64.S file for X64.
2. start.S file reviewed.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7884 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'DuetPkg/BootSector/start.S')
| -rw-r--r-- | DuetPkg/BootSector/start.S | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/DuetPkg/BootSector/start.S b/DuetPkg/BootSector/start.S index 58ac46d43f..bb31958611 100644 --- a/DuetPkg/BootSector/start.S +++ b/DuetPkg/BootSector/start.S @@ -218,7 +218,7 @@ FoundLastCluster: ReadBlocks:
pusha
- addl LBAOffsetForBootSector(%bp), %eax # Add LBAOffsetForBootSector to Start LBA
+ addl LBAOffsetForBootSector(%bp), %eax # Add LBAOffsetForBootSector to Start LBA
addl HiddenSectors(%bp), %eax # Add HiddenSectors to Start LBA
movl %eax, %esi # esi = Start LBA
movw %bx, %cx # cx = Number of blocks to read
@@ -315,7 +315,7 @@ LBAOffsetForBootSector: .equ WRITE_DATA_PORT_CMD, 0x0d1 # 8042 command to write the data port
.equ ENABLE_A20_CMD, 0x0df # 8042 command to enable A20
- #.org 0x200
+ .org 0x200
jmp start
Em64String:
.byte 'E', 0x0c, 'm', 0x0c, '6', 0x0c, '4', 0x0c, 'T', 0x0c, ' ', 0x0c, 'U', 0x0c, 'n', 0x0c, 's', 0x0c, 'u', 0x0c, 'p', 0x0c, 'p', 0x0c, 'o', 0x0c, 'r', 0x0c, 't', 0x0c, 'e', 0x0c, 'd', 0x0c, '!', 0x0c
@@ -353,11 +353,11 @@ MemMapDone: xorl %ebx, %ebx
movw %cs, %bx # BX=segment
shll $4, %ebx # BX="linear" address of segment base
- leal GDT_BASE(%ebx), %eax #
- movl %eax, (gdtr + 2) #
- leal IDT_BASE(%ebx), %eax #
- movl %eax, (idtr + 2) #
- leal MemoryMapSize(%ebx), %edx #
+ leal GDT_BASE(%ebx), %eax # EAX=PHYSICAL address of gdt
+ movl %eax, (gdtr + 2) # Put address of gdt into the gdtr
+ leal IDT_BASE(%ebx), %eax # EAX=PHYSICAL address of idt
+ movl %eax, (idtr + 2) # Put address of idt into the idtr
+ leal MemoryMapSize(%ebx), %edx # Physical base address of the memory map
addl $0x1000, %ebx # Source of EFI32
movl %ebx, JUMP+2
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