early_init.S
529 Bytes
/*
* Copyright (c) 2014 Google, Inc
*
* SPDX-License-Identifier: GPL-2.0+
*/
.globl early_board_init
early_board_init:
/* Enable post codes to EC */
#ifdef CONFIG_EARLY_POST_CROS_EC
mov $0x1b, %ecx
rdmsr
and $0x100, %eax
test %eax, %eax
je 1f
mov $0x8000f8f0, %eax
mov $0xcf8, %dx
out %eax, (%dx)
mov $0xfed1c001, %eax
mov $0xcfc, %dx
out %eax, (%dx)
mov $0xfed1f410, %esp
mov (%esp), %eax
and $0xfffffffb, %eax
mov %eax, (%esp)
1:
#endif
jmp early_board_init_ret