1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2011 Advanced Micro Devices, Inc.
*
* 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
*/
/******************************************************************************
* AMD Generic Encapsulated Software Architecture
*
* $Workfile:: cache_as_ram.inc
*
* Description: cache_as_ram.inc - AGESA Module Entry Point for GCC complier
*
******************************************************************************
*/
#include "gcccar.inc"
#include <cpu/x86/cache.h>
/*
* XMM map:
* xmm0: BIST
* xmm1: backup ebx -- cpu_init_detected
*/
.code32
.globl cache_as_ram_setup, disable_cache_as_ram, cache_as_ram_setup_out
cache_as_ram_setup:
post_code(0xa0)
/* enable SSE2 128bit instructions */
/* Turn on OSFXSR [BIT9] and OSXMMEXCPT [BIT10] onto CR4 register */
movl %cr4, %eax
orl $(3<<9), %eax
movl %eax, %cr4
/* Get the cpu_init_detected */
mov $1, %eax
cpuid
shr $24, %ebx
/* Save the BIST result */
cvtsi2sd %ebp, %xmm0
/* for normal part %ebx already contain cpu_init_detected from fallback call */
/* Save the cpu_init_detected */
cvtsi2sd %ebx, %xmm1
post_code(0xa1)
AMD_ENABLE_STACK
post_code(0xa1)
/* Restore the BIST result */
cvtsd2si %xmm0, %edx
/* Restore the cpu_init_detected */
cvtsd2si %xmm1, %ebx
pushl %ebx /* init detected */
pushl %edx /* bist */
call cache_as_ram_main
/* Should never see this postcode */
post_code(0xaf)
stop:
jmp stop
disable_cache_as_ram:
/* Save return stack */
movd %esp, %xmm0
/* Disable cache */
movl %cr0, %eax
orl $CR0_CacheDisable, %eax
movl %eax, %cr0
invd
AMD_DISABLE_STACK
/* enable cache */
movl %cr0, %eax
andl $0x9fffffff, %eax
movl %eax, %cr0
xorl %eax, %eax
/* Restore the return stack */
movd %xmm0, %esp
ret
cache_as_ram_setup_out:
|
