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
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/*
* 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.
*/
/******************************************************************************
* 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)
#ifdef __x86_64__
/* switch to 64 bit long mode */
mov %esi, %ecx
add $0, %ecx # core number
xor %eax, %eax
lea (0x1000+0x23)(%ecx), %edi
mov %edi, (%ecx)
mov %eax, 4(%ecx)
lea 0x1000(%ecx), %edi
movl $0x000000e3, 0x00(%edi)
movl %eax, 0x04(%edi)
movl $0x400000e3, 0x08(%edi)
movl %eax, 0x0c(%edi)
movl $0x800000e3, 0x10(%edi)
movl %eax, 0x14(%edi)
movl $0xc00000e3, 0x18(%edi)
movl %eax, 0x1c(%edi)
# load ROM based identity mapped page tables
mov %ecx, %eax
mov %eax, %cr3
# enable PAE
mov %cr4, %eax
bts $5, %eax
mov %eax, %cr4
# enable long mode
mov $0xC0000080, %ecx
rdmsr
bts $8, %eax
wrmsr
# enable paging
mov %cr0, %eax
bts $31, %eax
mov %eax, %cr0
# use call far to switch to 64-bit code segment
ljmp $0x18, $1f
1:
/* Pass the BIST result */
cvtsd2si %xmm1, %esi
/* Pass the cpu_init_detected */
cvtsd2si %xmm0, %edi
/* align the stack */
and $0xFFFFFFF0, %esp
.code64
call cache_as_ram_main
.code32
#else
AMD_ENABLE_STACK
/* 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
#endif
/* Should never see this postcode */
post_code(0xaf)
stop:
jmp stop
disable_cache_as_ram:
/* Save return stack */
movd 0(%esp), %xmm1
movd %esp, %xmm0
/* Disable cache */
movl %cr0, %eax
orl $CR0_CacheDisable, %eax
movl %eax, %cr0
AMD_DISABLE_STACK
/* enable cache */
movl %cr0, %eax
andl $0x9fffffff, %eax
movl %eax, %cr0
xorl %eax, %eax
/* Restore the return stack */
wbinvd
movd %xmm0, %esp
movd %xmm1, (%esp)
ret
cache_as_ram_setup_out:
#ifdef __x86_64__
.code64
#endif
|
