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Diffstat (limited to 'arch/i386/cpu/start.S')
| -rw-r--r-- | arch/i386/cpu/start.S | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/arch/i386/cpu/start.S b/arch/i386/cpu/start.S deleted file mode 100644 index 2124a42..0000000 --- a/arch/i386/cpu/start.S +++ /dev/null @@ -1,132 +0,0 @@ -/* - * U-boot - i386 Startup Code - * - * (C) Copyright 2008-2011 - * Graeme Russ, <graeme.russ@gmail.com> - * - * (C) Copyright 2002 - * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se> - * - * See file CREDITS for list of people who contributed to this - * project. - * - * 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., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -#include <config.h> -#include <version.h> -#include <asm/global_data.h> -#include <asm/processor-flags.h> - -.section .text -.code32 -.globl _start -.type _start, @function -.globl _i386boot_start -_i386boot_start: - /* - * This is the fail safe 32-bit bootstrap entry point. The - * following code is not executed from a cold-reset (actually, a - * lot of it is, but from real-mode after cold reset. It is - * repeated here to put the board into a state as close to cold - * reset as necessary) - */ - cli - cld - - /* Turn of cache (this might require a 486-class CPU) */ - movl %cr0, %eax - orl $(X86_CR0_NW | X86_CR0_CD), %eax - movl %eax, %cr0 - wbinvd - - /* Tell 32-bit code it is being entered from an in-RAM copy */ - movw $GD_FLG_WARM_BOOT, %bx -_start: - /* This is the 32-bit cold-reset entry point */ - - /* Load the segement registes to match the gdt loaded in start16.S */ - movl $0x18, %eax - movw %ax, %fs - movw %ax, %ds - movw %ax, %gs - movw %ax, %es - movw %ax, %ss - - /* Clear the interupt vectors */ - lidt blank_idt_ptr - - /* Early platform init (setup gpio, etc ) */ - jmp early_board_init -.globl early_board_init_ret -early_board_init_ret: - - /* Initialise Cache-As-RAM */ - jmp car_init -.globl car_init_ret -car_init_ret: - /* - * We now have CONFIG_SYS_CAR_SIZE bytes of Cache-As-RAM (or SRAM, - * or fully initialised SDRAM - we really don't care which) - * starting at CONFIG_SYS_CAR_ADDR to be used as a temporary stack - */ - movl $CONFIG_SYS_INIT_SP_ADDR, %esp - - /* Set parameter to board_init_f() to boot flags */ - xorl %eax, %eax - movw %bx, %ax - - /* Enter, U-boot! */ - call board_init_f - - /* indicate (lack of) progress */ - movw $0x85, %ax - jmp die - -.globl relocate_code -.type relocate_code, @function -relocate_code: - /* - * SDRAM has been initialised, U-Boot code has been copied into - * RAM, BSS has been cleared and relocation adjustments have been - * made. It is now time to jump into the in-RAM copy of U-Boot - * - * %eax = Address of top of stack - * %edx = Address of Global Data - * %ecx = Base address of in-RAM copy of U-Boot - */ - - /* Setup stack in RAM */ - movl %eax, %esp - - /* Setup call address of in-RAM copy of board_init_r() */ - movl $board_init_r, %ebp - addl (GD_RELOC_OFF * 4)(%edx), %ebp - - /* Setup parameters to board_init_r() */ - movl %edx, %eax - movl %ecx, %edx - - /* Jump to in-RAM copy of board_init_r() */ - call *%ebp - -die: hlt - jmp die - hlt - -blank_idt_ptr: - .word 0 /* limit */ - .long 0 /* base */ |