diff options
Diffstat (limited to 'src/arch/armv7/boot/wakeup.S')
| -rw-r--r-- | src/arch/armv7/boot/wakeup.S | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/src/arch/armv7/boot/wakeup.S b/src/arch/armv7/boot/wakeup.S deleted file mode 100644 index 8ae337ca5d..0000000000 --- a/src/arch/armv7/boot/wakeup.S +++ /dev/null @@ -1,94 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2009 Rudolf Marek <r.marek@assembler.cz> - * Copyright (C) 2009 coresystems GmbH - * - * 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; version 2 of the License. - * - * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#define WAKEUP_BASE 0x600 -#define RELOCATED(x) (x - __wakeup + WAKEUP_BASE) - -/* CR0 bits */ -#define PE (1 << 0) - - .code32 - .globl __wakeup -__wakeup: - /* First prepare the jmp to the resume vector */ - mov 0x4(%esp), %eax /* vector */ - /* last 4 bits of linear addr are taken as offset */ - andw $0x0f, %ax - movw %ax, (__wakeup_offset) - mov 0x4(%esp), %eax - /* the rest is taken as segment */ - shr $4, %eax - movw %ax, (__wakeup_segment) - - /* Then overwrite coreboot with our backed up memory */ - cld - movl 8(%esp), %esi - movl 12(%esp), %edi - movl 16(%esp), %ecx - shrl $2, %ecx - rep movsl - - /* Activate the right segment descriptor real mode. */ - ljmp $0x28, $RELOCATED(1f) -1: -.code16 - /* 16 bit code from here on... */ - - /* Load the segment registers w/ properly configured - * segment descriptors. They will retain these - * configurations (limits, writability, etc.) once - * protected mode is turned off. - */ - mov $0x30, %ax - mov %ax, %ds - mov %ax, %es - mov %ax, %fs - mov %ax, %gs - mov %ax, %ss - - /* Turn off protection */ - movl %cr0, %eax - andl $~PE, %eax - movl %eax, %cr0 - - /* Now really going into real mode */ - ljmp $0, $RELOCATED(1f) -1: - movw $0x0, %ax - movw %ax, %ds - movw %ax, %es - movw %ax, %ss - movw %ax, %fs - movw %ax, %gs - - /* This is a FAR JMP to the OS waking vector. The C code changed - * the address to be correct. - */ - .byte 0xea - -__wakeup_offset = RELOCATED(.) - .word 0x0000 - -__wakeup_segment = RELOCATED(.) - .word 0x0000 - - .globl __wakeup_size -__wakeup_size = ( . - __wakeup) - |