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
|
/*
* This file is part of the LinuxBIOS project.
*
* Copyright (C) 2006 Indrek Kruusa <indrek.kruusa@artecdesign.ee>
* Copyright (C) 2006 Ronald G. Minnich <rminnich@gmail.com>
* Copyright (C) 2007 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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
*/
#include <console/console.h>
#include <arch/io.h>
#include <stdint.h>
#include <device/device.h>
#include <stdlib.h>
#include <string.h>
#include <bitops.h>
#include <cpu/x86/msr.h>
#include <cpu/amd/lxdef.h>
/**************************************************************************
*
* pcideadlock
*
* Bugtool #465 and #609
* PCI cache deadlock
* There is also fix code in cache and PCI functions. This bug is very is pervasive.
*
**************************************************************************/
static void pcideadlock(void)
{
msr_t msr;
/*
* forces serialization of all load misses. Setting this bit prevents the
* DM pipe from backing up if a read request has to be held up waiting
* for PCI writes to complete.
*/
msr = rdmsr(CPU_DM_CONFIG0);
msr.lo |= DM_CONFIG0_LOWER_MISSER_SET;
wrmsr(CPU_DM_CONFIG0, msr);
/* write serialize memory hole to PCI. Need to unWS when something is
* shadowed regardless of cachablility.
*/
msr.lo = 0x021212121;
msr.hi = 0x021212121;
wrmsr(CPU_RCONF_A0_BF, msr);
wrmsr(CPU_RCONF_C0_DF, msr);
wrmsr(CPU_RCONF_E0_FF, msr);
}
/****************************************************************************/
/***/
/** DisableMemoryReorder*/
/***/
/** PBZ 3659:*/
/** The MC reordered transactions incorrectly and breaks coherency.*/
/** Disable reording and take a potential performance hit.*/
/** This is safe to do here and not in MC init since there is nothing*/
/** to maintain coherency with and the cache is not enabled yet.*/
/***/
/****************************************************************************/
static void disablememoryreadorder(void)
{
msr_t msr;
msr = rdmsr(MC_CF8F_DATA);
msr.hi |= CF8F_UPPER_REORDER_DIS_SET;
wrmsr(MC_CF8F_DATA, msr);
}
/* For cpu version C3. Should be the only released version */
void cpubug(void)
{
pcideadlock();
disablememoryreadorder();
printk_debug("Done cpubug fixes \n");
}
|
