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
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2011 Google 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.
*/
#include <stdint.h>
#include <arch/cpu.h>
#include <cpu/x86/cache.h>
#include <cpu/x86/msr.h>
#include <cpu/x86/mtrr.h>
#include <arch/io.h>
#include <halt.h>
#include <cpu/intel/microcode/microcode.c>
#include "haswell.h"
#if CONFIG_SOUTHBRIDGE_INTEL_LYNXPOINT
/* Needed for RCBA access to set Soft Reset Data register */
#include <southbridge/intel/lynxpoint/pch.h>
#else
#error "CPU must be paired with Intel LynxPoint southbridge"
#endif
static void set_var_mtrr(
unsigned reg, unsigned base, unsigned size, unsigned type)
{
/* Bit Bit 32-35 of MTRRphysMask should be set to 1 */
/* FIXME: It only support 4G less range */
msr_t basem, maskm;
basem.lo = base | type;
basem.hi = 0;
wrmsr(MTRR_PHYS_BASE(reg), basem);
maskm.lo = ~(size - 1) | MTRR_PHYS_MASK_VALID;
maskm.hi = (1 << (CONFIG_CPU_ADDR_BITS - 32)) - 1;
wrmsr(MTRR_PHYS_MASK(reg), maskm);
}
static void enable_rom_caching(void)
{
msr_t msr;
disable_cache();
set_var_mtrr(1, CACHE_ROM_BASE, CACHE_ROM_SIZE, MTRR_TYPE_WRPROT);
enable_cache();
/* Enable Variable MTRRs */
msr.hi = 0x00000000;
msr.lo = 0x00000800;
wrmsr(MTRR_DEF_TYPE_MSR, msr);
}
static void set_flex_ratio_to_tdp_nominal(void)
{
msr_t flex_ratio, msr;
u32 soft_reset;
u8 nominal_ratio;
/* Check for Flex Ratio support */
flex_ratio = rdmsr(MSR_FLEX_RATIO);
if (!(flex_ratio.lo & FLEX_RATIO_EN))
return;
/* Check for >0 configurable TDPs */
msr = rdmsr(MSR_PLATFORM_INFO);
if (((msr.hi >> 1) & 3) == 0)
return;
/* Use nominal TDP ratio for flex ratio */
msr = rdmsr(MSR_CONFIG_TDP_NOMINAL);
nominal_ratio = msr.lo & 0xff;
/* See if flex ratio is already set to nominal TDP ratio */
if (((flex_ratio.lo >> 8) & 0xff) == nominal_ratio)
return;
/* Set flex ratio to nominal TDP ratio */
flex_ratio.lo &= ~0xff00;
flex_ratio.lo |= nominal_ratio << 8;
flex_ratio.lo |= FLEX_RATIO_LOCK;
wrmsr(MSR_FLEX_RATIO, flex_ratio);
/* Set flex ratio in soft reset data register bits 11:6.
* RCBA region is enabled in southbridge bootblock */
soft_reset = RCBA32(SOFT_RESET_DATA);
soft_reset &= ~(0x3f << 6);
soft_reset |= (nominal_ratio & 0x3f) << 6;
RCBA32(SOFT_RESET_DATA) = soft_reset;
/* Set soft reset control to use register value */
RCBA32_OR(SOFT_RESET_CTRL, 1);
/* Issue warm reset, will be "CPU only" due to soft reset data */
outb(0x0, 0xcf9);
outb(0x6, 0xcf9);
halt();
}
static void check_for_clean_reset(void)
{
msr_t msr;
msr = rdmsr(MTRR_DEF_TYPE_MSR);
/* Use the MTRR default type MSR as a proxy for detecting INIT#.
* Reset the system if any known bits are set in that MSR. That is
* an indication of the CPU not being properly reset. */
if (msr.lo & (MTRR_DEF_TYPE_EN | MTRR_DEF_TYPE_FIX_EN)) {
outb(0x0, 0xcf9);
outb(0x6, 0xcf9);
halt();
}
}
static void bootblock_cpu_init(void)
{
/* Set flex ratio and reset if needed */
set_flex_ratio_to_tdp_nominal();
check_for_clean_reset();
enable_rom_caching();
intel_update_microcode_from_cbfs();
}
|
