diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/x86/boot/header.S')
| -rw-r--r-- | ANDROID_3.4.5/arch/x86/boot/header.S | 478 |
1 files changed, 0 insertions, 478 deletions
diff --git a/ANDROID_3.4.5/arch/x86/boot/header.S b/ANDROID_3.4.5/arch/x86/boot/header.S deleted file mode 100644 index f1bbeeb0..00000000 --- a/ANDROID_3.4.5/arch/x86/boot/header.S +++ /dev/null @@ -1,478 +0,0 @@ -/* - * header.S - * - * Copyright (C) 1991, 1992 Linus Torvalds - * - * Based on bootsect.S and setup.S - * modified by more people than can be counted - * - * Rewritten as a common file by H. Peter Anvin (Apr 2007) - * - * BIG FAT NOTE: We're in real mode using 64k segments. Therefore segment - * addresses must be multiplied by 16 to obtain their respective linear - * addresses. To avoid confusion, linear addresses are written using leading - * hex while segment addresses are written as segment:offset. - * - */ - -#include <asm/segment.h> -#include <generated/utsrelease.h> -#include <asm/boot.h> -#include <asm/e820.h> -#include <asm/page_types.h> -#include <asm/setup.h> -#include "boot.h" -#include "voffset.h" -#include "zoffset.h" - -BOOTSEG = 0x07C0 /* original address of boot-sector */ -SYSSEG = 0x1000 /* historical load address >> 4 */ - -#ifndef SVGA_MODE -#define SVGA_MODE ASK_VGA -#endif - -#ifndef RAMDISK -#define RAMDISK 0 -#endif - -#ifndef ROOT_RDONLY -#define ROOT_RDONLY 1 -#endif - - .code16 - .section ".bstext", "ax" - - .global bootsect_start -bootsect_start: -#ifdef CONFIG_EFI_STUB - # "MZ", MS-DOS header - .byte 0x4d - .byte 0x5a -#endif - - # Normalize the start address - ljmp $BOOTSEG, $start2 - -start2: - movw %cs, %ax - movw %ax, %ds - movw %ax, %es - movw %ax, %ss - xorw %sp, %sp - sti - cld - - movw $bugger_off_msg, %si - -msg_loop: - lodsb - andb %al, %al - jz bs_die - movb $0xe, %ah - movw $7, %bx - int $0x10 - jmp msg_loop - -bs_die: - # Allow the user to press a key, then reboot - xorw %ax, %ax - int $0x16 - int $0x19 - - # int 0x19 should never return. In case it does anyway, - # invoke the BIOS reset code... - ljmp $0xf000,$0xfff0 - -#ifdef CONFIG_EFI_STUB - .org 0x3c - # - # Offset to the PE header. - # - .long pe_header -#endif /* CONFIG_EFI_STUB */ - - .section ".bsdata", "a" -bugger_off_msg: - .ascii "Direct booting from floppy is no longer supported.\r\n" - .ascii "Please use a boot loader program instead.\r\n" - .ascii "\n" - .ascii "Remove disk and press any key to reboot . . .\r\n" - .byte 0 - -#ifdef CONFIG_EFI_STUB -pe_header: - .ascii "PE" - .word 0 - -coff_header: -#ifdef CONFIG_X86_32 - .word 0x14c # i386 -#else - .word 0x8664 # x86-64 -#endif - .word 2 # nr_sections - .long 0 # TimeDateStamp - .long 0 # PointerToSymbolTable - .long 1 # NumberOfSymbols - .word section_table - optional_header # SizeOfOptionalHeader -#ifdef CONFIG_X86_32 - .word 0x306 # Characteristics. - # IMAGE_FILE_32BIT_MACHINE | - # IMAGE_FILE_DEBUG_STRIPPED | - # IMAGE_FILE_EXECUTABLE_IMAGE | - # IMAGE_FILE_LINE_NUMS_STRIPPED -#else - .word 0x206 # Characteristics - # IMAGE_FILE_DEBUG_STRIPPED | - # IMAGE_FILE_EXECUTABLE_IMAGE | - # IMAGE_FILE_LINE_NUMS_STRIPPED -#endif - -optional_header: -#ifdef CONFIG_X86_32 - .word 0x10b # PE32 format -#else - .word 0x20b # PE32+ format -#endif - .byte 0x02 # MajorLinkerVersion - .byte 0x14 # MinorLinkerVersion - - # Filled in by build.c - .long 0 # SizeOfCode - - .long 0 # SizeOfInitializedData - .long 0 # SizeOfUninitializedData - - # Filled in by build.c - .long 0x0000 # AddressOfEntryPoint - - .long 0x0000 # BaseOfCode -#ifdef CONFIG_X86_32 - .long 0 # data -#endif - -extra_header_fields: -#ifdef CONFIG_X86_32 - .long 0 # ImageBase -#else - .quad 0 # ImageBase -#endif - .long 0x1000 # SectionAlignment - .long 0x200 # FileAlignment - .word 0 # MajorOperatingSystemVersion - .word 0 # MinorOperatingSystemVersion - .word 0 # MajorImageVersion - .word 0 # MinorImageVersion - .word 0 # MajorSubsystemVersion - .word 0 # MinorSubsystemVersion - .long 0 # Win32VersionValue - - # - # The size of the bzImage is written in tools/build.c - # - .long 0 # SizeOfImage - - .long 0x200 # SizeOfHeaders - .long 0 # CheckSum - .word 0xa # Subsystem (EFI application) - .word 0 # DllCharacteristics -#ifdef CONFIG_X86_32 - .long 0 # SizeOfStackReserve - .long 0 # SizeOfStackCommit - .long 0 # SizeOfHeapReserve - .long 0 # SizeOfHeapCommit -#else - .quad 0 # SizeOfStackReserve - .quad 0 # SizeOfStackCommit - .quad 0 # SizeOfHeapReserve - .quad 0 # SizeOfHeapCommit -#endif - .long 0 # LoaderFlags - .long 0x1 # NumberOfRvaAndSizes - - .quad 0 # ExportTable - .quad 0 # ImportTable - .quad 0 # ResourceTable - .quad 0 # ExceptionTable - .quad 0 # CertificationTable - .quad 0 # BaseRelocationTable - - # Section table -section_table: - .ascii ".text" - .byte 0 - .byte 0 - .byte 0 - .long 0 - .long 0x0 # startup_{32,64} - .long 0 # Size of initialized data - # on disk - .long 0x0 # startup_{32,64} - .long 0 # PointerToRelocations - .long 0 # PointerToLineNumbers - .word 0 # NumberOfRelocations - .word 0 # NumberOfLineNumbers - .long 0x60500020 # Characteristics (section flags) - - # - # The EFI application loader requires a relocation section - # because EFI applications are relocatable and not having - # this section seems to confuse it. But since we don't need - # the loader to fixup any relocs for us just fill it with a - # single dummy reloc. - # - .ascii ".reloc" - .byte 0 - .byte 0 - .long reloc_end - reloc_start - .long reloc_start - .long reloc_end - reloc_start # SizeOfRawData - .long reloc_start # PointerToRawData - .long 0 # PointerToRelocations - .long 0 # PointerToLineNumbers - .word 0 # NumberOfRelocations - .word 0 # NumberOfLineNumbers - .long 0x42100040 # Characteristics (section flags) -#endif /* CONFIG_EFI_STUB */ - - # Kernel attributes; used by setup. This is part 1 of the - # header, from the old boot sector. - - .section ".header", "a" - .globl hdr -hdr: -setup_sects: .byte 0 /* Filled in by build.c */ -root_flags: .word ROOT_RDONLY -syssize: .long 0 /* Filled in by build.c */ -ram_size: .word 0 /* Obsolete */ -vid_mode: .word SVGA_MODE -root_dev: .word 0 /* Filled in by build.c */ -boot_flag: .word 0xAA55 - - # offset 512, entry point - - .globl _start -_start: - # Explicitly enter this as bytes, or the assembler - # tries to generate a 3-byte jump here, which causes - # everything else to push off to the wrong offset. - .byte 0xeb # short (2-byte) jump - .byte start_of_setup-1f -1: - - # Part 2 of the header, from the old setup.S - - .ascii "HdrS" # header signature - .word 0x020a # header version number (>= 0x0105) - # or else old loadlin-1.5 will fail) - .globl realmode_swtch -realmode_swtch: .word 0, 0 # default_switch, SETUPSEG -start_sys_seg: .word SYSSEG # obsolete and meaningless, but just - # in case something decided to "use" it - .word kernel_version-512 # pointing to kernel version string - # above section of header is compatible - # with loadlin-1.5 (header v1.5). Don't - # change it. - -type_of_loader: .byte 0 # 0 means ancient bootloader, newer - # bootloaders know to change this. - # See Documentation/x86/boot.txt for - # assigned ids - -# flags, unused bits must be zero (RFU) bit within loadflags -loadflags: -LOADED_HIGH = 1 # If set, the kernel is loaded high -CAN_USE_HEAP = 0x80 # If set, the loader also has set - # heap_end_ptr to tell how much - # space behind setup.S can be used for - # heap purposes. - # Only the loader knows what is free - .byte LOADED_HIGH - -setup_move_size: .word 0x8000 # size to move, when setup is not - # loaded at 0x90000. We will move setup - # to 0x90000 then just before jumping - # into the kernel. However, only the - # loader knows how much data behind - # us also needs to be loaded. - -code32_start: # here loaders can put a different - # start address for 32-bit code. - .long 0x100000 # 0x100000 = default for big kernel - -ramdisk_image: .long 0 # address of loaded ramdisk image - # Here the loader puts the 32-bit - # address where it loaded the image. - # This only will be read by the kernel. - -ramdisk_size: .long 0 # its size in bytes - -bootsect_kludge: - .long 0 # obsolete - -heap_end_ptr: .word _end+STACK_SIZE-512 - # (Header version 0x0201 or later) - # space from here (exclusive) down to - # end of setup code can be used by setup - # for local heap purposes. - -ext_loader_ver: - .byte 0 # Extended boot loader version -ext_loader_type: - .byte 0 # Extended boot loader type - -cmd_line_ptr: .long 0 # (Header version 0x0202 or later) - # If nonzero, a 32-bit pointer - # to the kernel command line. - # The command line should be - # located between the start of - # setup and the end of low - # memory (0xa0000), or it may - # get overwritten before it - # gets read. If this field is - # used, there is no longer - # anything magical about the - # 0x90000 segment; the setup - # can be located anywhere in - # low memory 0x10000 or higher. - -ramdisk_max: .long 0x7fffffff - # (Header version 0x0203 or later) - # The highest safe address for - # the contents of an initrd - # The current kernel allows up to 4 GB, - # but leave it at 2 GB to avoid - # possible bootloader bugs. - -kernel_alignment: .long CONFIG_PHYSICAL_ALIGN #physical addr alignment - #required for protected mode - #kernel -#ifdef CONFIG_RELOCATABLE -relocatable_kernel: .byte 1 -#else -relocatable_kernel: .byte 0 -#endif -min_alignment: .byte MIN_KERNEL_ALIGN_LG2 # minimum alignment -pad3: .word 0 - -cmdline_size: .long COMMAND_LINE_SIZE-1 #length of the command line, - #added with boot protocol - #version 2.06 - -hardware_subarch: .long 0 # subarchitecture, added with 2.07 - # default to 0 for normal x86 PC - -hardware_subarch_data: .quad 0 - -payload_offset: .long ZO_input_data -payload_length: .long ZO_z_input_len - -setup_data: .quad 0 # 64-bit physical pointer to - # single linked list of - # struct setup_data - -pref_address: .quad LOAD_PHYSICAL_ADDR # preferred load addr - -#define ZO_INIT_SIZE (ZO__end - ZO_startup_32 + ZO_z_extract_offset) -#define VO_INIT_SIZE (VO__end - VO__text) -#if ZO_INIT_SIZE > VO_INIT_SIZE -#define INIT_SIZE ZO_INIT_SIZE -#else -#define INIT_SIZE VO_INIT_SIZE -#endif -init_size: .long INIT_SIZE # kernel initialization size - -# End of setup header ##################################################### - - .section ".entrytext", "ax" -start_of_setup: -#ifdef SAFE_RESET_DISK_CONTROLLER -# Reset the disk controller. - movw $0x0000, %ax # Reset disk controller - movb $0x80, %dl # All disks - int $0x13 -#endif - -# Force %es = %ds - movw %ds, %ax - movw %ax, %es - cld - -# Apparently some ancient versions of LILO invoked the kernel with %ss != %ds, -# which happened to work by accident for the old code. Recalculate the stack -# pointer if %ss is invalid. Otherwise leave it alone, LOADLIN sets up the -# stack behind its own code, so we can't blindly put it directly past the heap. - - movw %ss, %dx - cmpw %ax, %dx # %ds == %ss? - movw %sp, %dx - je 2f # -> assume %sp is reasonably set - - # Invalid %ss, make up a new stack - movw $_end, %dx - testb $CAN_USE_HEAP, loadflags - jz 1f - movw heap_end_ptr, %dx -1: addw $STACK_SIZE, %dx - jnc 2f - xorw %dx, %dx # Prevent wraparound - -2: # Now %dx should point to the end of our stack space - andw $~3, %dx # dword align (might as well...) - jnz 3f - movw $0xfffc, %dx # Make sure we're not zero -3: movw %ax, %ss - movzwl %dx, %esp # Clear upper half of %esp - sti # Now we should have a working stack - -# We will have entered with %cs = %ds+0x20, normalize %cs so -# it is on par with the other segments. - pushw %ds - pushw $6f - lretw -6: - -# Check signature at end of setup - cmpl $0x5a5aaa55, setup_sig - jne setup_bad - -# Zero the bss - movw $__bss_start, %di - movw $_end+3, %cx - xorl %eax, %eax - subw %di, %cx - shrw $2, %cx - rep; stosl - -# Jump to C code (should not return) - calll main - -# Setup corrupt somehow... -setup_bad: - movl $setup_corrupt, %eax - calll puts - # Fall through... - - .globl die - .type die, @function -die: - hlt - jmp die - - .size die, .-die - - .section ".initdata", "a" -setup_corrupt: - .byte 7 - .string "No setup signature found...\n" - - .data -dummy: .long 0 - - .section .reloc -reloc_start: - .long dummy - reloc_start - .long 10 - .word 0 -reloc_end: |