diff options
Diffstat (limited to 'arch/x86/boot/header.S')
| -rw-r--r-- | arch/x86/boot/header.S | 258 |
1 files changed, 233 insertions, 25 deletions
diff --git a/arch/x86/boot/header.S b/arch/x86/boot/header.S index 93e689f4bd8..7a6d43a554d 100644 --- a/arch/x86/boot/header.S +++ b/arch/x86/boot/header.S @@ -21,6 +21,7 @@ #include <asm/e820.h> #include <asm/page_types.h> #include <asm/setup.h> +#include <asm/bootparam.h> #include "boot.h" #include "voffset.h" #include "zoffset.h" @@ -32,10 +33,6 @@ SYSSEG = 0x1000 /* historical load address >> 4 */ #define SVGA_MODE ASK_VGA #endif -#ifndef RAMDISK -#define RAMDISK 0 -#endif - #ifndef ROOT_RDONLY #define ROOT_RDONLY 1 #endif @@ -45,6 +42,11 @@ SYSSEG = 0x1000 /* historical load address >> 4 */ .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 @@ -79,19 +81,202 @@ bs_die: # 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 "Use a boot loader.\r\n" .ascii "\n" - .ascii "Remove disk and press any key to reboot . . .\r\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 4 # 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 0x0200 # 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 0x20 # SectionAlignment + .long 0x20 # 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 0x6 # NumberOfRvaAndSizes + + .quad 0 # ExportTable + .quad 0 # ImportTable + .quad 0 # ResourceTable + .quad 0 # ExceptionTable + .quad 0 # CertificationTable + .quad 0 # BaseRelocationTable + + # Section table +section_table: + # + # The offset & size fields are filled in by build.c. + # + .ascii ".setup" + .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 must be relocatable. The .reloc + # offset & size fields are filled in by build.c. + # + .ascii ".reloc" + .byte 0 + .byte 0 + .long 0 + .long 0 + .long 0 # SizeOfRawData + .long 0 # PointerToRawData + .long 0 # PointerToRelocations + .long 0 # PointerToLineNumbers + .word 0 # NumberOfRelocations + .word 0 # NumberOfLineNumbers + .long 0x42100040 # Characteristics (section flags) + + # + # The offset & size fields are filled in by build.c. + # + .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 offset & size fields are filled in by build.c. + # + .ascii ".bss" + .byte 0 + .byte 0 + .byte 0 + .byte 0 + .long 0 + .long 0x0 + .long 0 # Size of initialized data + # on disk + .long 0x0 + .long 0 # PointerToRelocations + .long 0 # PointerToLineNumbers + .word 0 # NumberOfRelocations + .word 0 # NumberOfLineNumbers + .long 0xc8000080 # 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 sentinel +sentinel: .byte 0xff, 0xff /* Used to detect broken loaders */ + .globl hdr hdr: setup_sects: .byte 0 /* Filled in by build.c */ @@ -116,7 +301,7 @@ _start: # Part 2 of the header, from the old setup.S .ascii "HdrS" # header signature - .word 0x020a # header version number (>= 0x0105) + .word 0x020d # header version number (>= 0x0105) # or else old loadlin-1.5 will fail) .globl realmode_swtch realmode_swtch: .word 0, 0 # default_switch, SETUPSEG @@ -129,18 +314,12 @@ start_sys_seg: .word SYSSEG # obsolete and meaningless, but just type_of_loader: .byte 0 # 0 means ancient bootloader, newer # bootloaders know to change this. - # See Documentation/i386/boot.txt for + # 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 + .byte LOADED_HIGH # The kernel is to be loaded high setup_move_size: .word 0x8000 # size to move, when setup is not # loaded at 0x90000. We will move setup @@ -189,7 +368,7 @@ cmd_line_ptr: .long 0 # (Header version 0x0202 or later) # can be located anywhere in # low memory 0x10000 or higher. -ramdisk_max: .long 0x7fffffff +initrd_addr_max: .long 0x7fffffff # (Header version 0x0203 or later) # The highest safe address for # the contents of an initrd @@ -206,7 +385,42 @@ relocatable_kernel: .byte 1 relocatable_kernel: .byte 0 #endif min_alignment: .byte MIN_KERNEL_ALIGN_LG2 # minimum alignment -pad3: .word 0 + +xloadflags: +#ifdef CONFIG_X86_64 +# define XLF0 XLF_KERNEL_64 /* 64-bit kernel */ +#else +# define XLF0 0 +#endif + +#if defined(CONFIG_RELOCATABLE) && defined(CONFIG_X86_64) + /* kernel/boot_param/ramdisk could be loaded above 4g */ +# define XLF1 XLF_CAN_BE_LOADED_ABOVE_4G +#else +# define XLF1 0 +#endif + +#ifdef CONFIG_EFI_STUB +# ifdef CONFIG_EFI_MIXED +# define XLF23 (XLF_EFI_HANDOVER_32|XLF_EFI_HANDOVER_64) +# else +# ifdef CONFIG_X86_64 +# define XLF23 XLF_EFI_HANDOVER_64 /* 64-bit EFI handover ok */ +# else +# define XLF23 XLF_EFI_HANDOVER_32 /* 32-bit EFI handover ok */ +# endif +# endif +#else +# define XLF23 0 +#endif + +#if defined(CONFIG_X86_64) && defined(CONFIG_EFI) && defined(CONFIG_KEXEC) +# define XLF4 XLF_EFI_KEXEC +#else +# define XLF4 0 +#endif + + .word XLF0 | XLF1 | XLF23 | XLF4 cmdline_size: .long COMMAND_LINE_SIZE-1 #length of the command line, #added with boot protocol @@ -234,18 +448,12 @@ pref_address: .quad LOAD_PHYSICAL_ADDR # preferred load addr #define INIT_SIZE VO_INIT_SIZE #endif init_size: .long INIT_SIZE # kernel initialization size +handover_offset: .long 0 # Filled in by build.c # 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 |