mirror of
https://github.com/fail0verflow/switch-coreboot.git
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52bdacea13
people can suggest what's wrong. Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Acked-by: Ronald G. Minnich <rminnich@gmail.com> git-svn-id: svn://coreboot.org/repository/coreboot-v3@1139 f3766cd6-281f-0410-b1cd-43a5c92072e9
111 lines
2.7 KiB
ArmAsm
111 lines
2.7 KiB
ArmAsm
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2002 Linux Networx
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* (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
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* Copyright (C) 2004 Ollie Lo
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* Copyright (C) 2005 YingHai Lu
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* Copyright (C) Copyright (C) 2005-2007 Stefan Reinauer <stepan@openbios.org>
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* Copyright (C) 2009 Ronald G. Minnich <rminnich@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
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*/
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.text
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.globl _secondary_start, _secondary_start_end
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_secondary_start:
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1:
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.code16
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.balign 4096
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cli
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movl $1b, %ebx
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xorl %eax, %eax
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movl %eax, %cr3 /* Invalidate TLB*/
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/* On hyper threaded cpus, invalidating the cache here is
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* very very bad. Don't.
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*/
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/* setup the data segment */
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movw %cs, %ax
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movw %ax, %ds
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data32 lgdt gdtaddr - _secondary_start
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movl %cr0, %eax
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andl $0x7FFAFFD1, %eax /* PG,AM,WP,NE,TS,EM,MP = 0 */
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orl $0x60000001, %eax /* CD, NW, PE = 1 */
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movl %eax, %cr0
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ljmpl $0x10, $1f
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1:
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.code32
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secondary32:
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movw $0x18, %ax
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movw %ax, %ds
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movw %ax, %es
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movw %ax, %ss
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movw %ax, %fs
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movw %ax, %gs
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/* Load the Interrupt descriptor table */
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lidt idtarg
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/* Set the stack pointer */
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movl -4(%ebx),%esp
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movl $0, -4(%ebx)
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call secondary_cpu_init
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1: hlt
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jmp 1b
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.align 4
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gdt_limit = gdt_end - gdt - 1 /* Compute the table limit. */
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gdt:
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gdtptr:
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.word gdt_end - gdt -1 /* Compute the table limit. */
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.long gdt /* We know the offset. */
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.word 0
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/* selgdt 0x08, flat code segment */
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.word 0xffff, 0x0000
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.byte 0x00, 0x9b, 0xcf, 0x00
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/* selgdt 0x10, flat data segment */
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.word 0xffff, 0x0000
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.byte 0x00, 0x93, 0xcf, 0x00
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/* selgdt 0x18, flat code segment for CAR */
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.word 0xffff, 0x0000
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.byte 0x00, 0x9b, 0xcf, 0x00
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/* selgdt 0x20, flat data segment for CAR */
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.word 0xffff, 0x0000
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.byte 0x00, 0x93, 0xcf, 0x00
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gdt_end:
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gdtaddr:
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.word gdt_limit /* the table limit */
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.long gdt /* we know the offset */
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idtarg:
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.word _idt_end - _idt - 1 /* limit */
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.long _idt
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.word 0
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_idt:
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.fill 20, 8, 0 # idt is unitiailzed
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_idt_end:
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_secondary_start_end:
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.code32
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