diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/x86/boot/compressed/head_32.S')
| -rw-r--r-- | ANDROID_3.4.5/arch/x86/boot/compressed/head_32.S | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/ANDROID_3.4.5/arch/x86/boot/compressed/head_32.S b/ANDROID_3.4.5/arch/x86/boot/compressed/head_32.S deleted file mode 100644 index c85e3ac9..00000000 --- a/ANDROID_3.4.5/arch/x86/boot/compressed/head_32.S +++ /dev/null @@ -1,225 +0,0 @@ -/* - * linux/boot/head.S - * - * Copyright (C) 1991, 1992, 1993 Linus Torvalds - */ - -/* - * head.S contains the 32-bit startup code. - * - * NOTE!!! Startup happens at absolute address 0x00001000, which is also where - * the page directory will exist. The startup code will be overwritten by - * the page directory. [According to comments etc elsewhere on a compressed - * kernel it will end up at 0x1000 + 1Mb I hope so as I assume this. - AC] - * - * Page 0 is deliberately kept safe, since System Management Mode code in - * laptops may need to access the BIOS data stored there. This is also - * useful for future device drivers that either access the BIOS via VM86 - * mode. - */ - -/* - * High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996 - */ - .text - -#include <linux/init.h> -#include <linux/linkage.h> -#include <asm/segment.h> -#include <asm/page_types.h> -#include <asm/boot.h> -#include <asm/asm-offsets.h> - - __HEAD -ENTRY(startup_32) -#ifdef CONFIG_EFI_STUB - jmp preferred_addr - - .balign 0x10 - /* - * We don't need the return address, so set up the stack so - * efi_main() can find its arugments. - */ - add $0x4, %esp - - call efi_main - cmpl $0, %eax - movl %eax, %esi - jne 2f -1: - /* EFI init failed, so hang. */ - hlt - jmp 1b -2: - call 3f -3: - popl %eax - subl $3b, %eax - subl BP_pref_address(%esi), %eax - add BP_code32_start(%esi), %eax - leal preferred_addr(%eax), %eax - jmp *%eax - -preferred_addr: -#endif - cld - /* - * Test KEEP_SEGMENTS flag to see if the bootloader is asking - * us to not reload segments - */ - testb $(1<<6), BP_loadflags(%esi) - jnz 1f - - cli - movl $__BOOT_DS, %eax - movl %eax, %ds - movl %eax, %es - movl %eax, %fs - movl %eax, %gs - movl %eax, %ss -1: - -/* - * Calculate the delta between where we were compiled to run - * at and where we were actually loaded at. This can only be done - * with a short local call on x86. Nothing else will tell us what - * address we are running at. The reserved chunk of the real-mode - * data at 0x1e4 (defined as a scratch field) are used as the stack - * for this calculation. Only 4 bytes are needed. - */ - leal (BP_scratch+4)(%esi), %esp - call 1f -1: popl %ebp - subl $1b, %ebp - -/* - * %ebp contains the address we are loaded at by the boot loader and %ebx - * contains the address where we should move the kernel image temporarily - * for safe in-place decompression. - */ - -#ifdef CONFIG_RELOCATABLE - movl %ebp, %ebx - movl BP_kernel_alignment(%esi), %eax - decl %eax - addl %eax, %ebx - notl %eax - andl %eax, %ebx -#else - movl $LOAD_PHYSICAL_ADDR, %ebx -#endif - - /* Target address to relocate to for decompression */ - addl $z_extract_offset, %ebx - - /* Set up the stack */ - leal boot_stack_end(%ebx), %esp - - /* Zero EFLAGS */ - pushl $0 - popfl - -/* - * Copy the compressed kernel to the end of our buffer - * where decompression in place becomes safe. - */ - pushl %esi - leal (_bss-4)(%ebp), %esi - leal (_bss-4)(%ebx), %edi - movl $(_bss - startup_32), %ecx - shrl $2, %ecx - std - rep movsl - cld - popl %esi - -/* - * Jump to the relocated address. - */ - leal relocated(%ebx), %eax - jmp *%eax -ENDPROC(startup_32) - - .text -relocated: - -/* - * Clear BSS (stack is currently empty) - */ - xorl %eax, %eax - leal _bss(%ebx), %edi - leal _ebss(%ebx), %ecx - subl %edi, %ecx - shrl $2, %ecx - rep stosl - -/* - * Adjust our own GOT - */ - leal _got(%ebx), %edx - leal _egot(%ebx), %ecx -1: - cmpl %ecx, %edx - jae 2f - addl %ebx, (%edx) - addl $4, %edx - jmp 1b -2: - -/* - * Do the decompression, and jump to the new kernel.. - */ - leal z_extract_offset_negative(%ebx), %ebp - /* push arguments for decompress_kernel: */ - pushl %ebp /* output address */ - pushl $z_input_len /* input_len */ - leal input_data(%ebx), %eax - pushl %eax /* input_data */ - leal boot_heap(%ebx), %eax - pushl %eax /* heap area */ - pushl %esi /* real mode pointer */ - call decompress_kernel - addl $20, %esp - -#if CONFIG_RELOCATABLE -/* - * Find the address of the relocations. - */ - leal z_output_len(%ebp), %edi - -/* - * Calculate the delta between where vmlinux was compiled to run - * and where it was actually loaded. - */ - movl %ebp, %ebx - subl $LOAD_PHYSICAL_ADDR, %ebx - jz 2f /* Nothing to be done if loaded at compiled addr. */ -/* - * Process relocations. - */ - -1: subl $4, %edi - movl (%edi), %ecx - testl %ecx, %ecx - jz 2f - addl %ebx, -__PAGE_OFFSET(%ebx, %ecx) - jmp 1b -2: -#endif - -/* - * Jump to the decompressed kernel. - */ - xorl %ebx, %ebx - jmp *%ebp - -/* - * Stack and heap for uncompression - */ - .bss - .balign 4 -boot_heap: - .fill BOOT_HEAP_SIZE, 1, 0 -boot_stack: - .fill BOOT_STACK_SIZE, 1, 0 -boot_stack_end: |