blob: 576a2239ed1a6f4e417a49b972e8cc8d7111099e (
plain)
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
|
/*
* This file is part of the coreboot project.
*
* 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
*/
static void pll_reset(char manualconf)
{
msr_t msrGlcpSysRstpll;
msrGlcpSysRstpll = rdmsr(GLCP_SYS_RSTPLL);
print_debug("_MSR GLCP_SYS_RSTPLL (");
print_debug_hex32(GLCP_SYS_RSTPLL);
print_debug(") value is: ");
print_debug_hex32(msrGlcpSysRstpll.hi);
print_debug(":");
print_debug_hex32(msrGlcpSysRstpll.lo);
print_debug("\n");
post_code(POST_PLL_INIT);
if (!(msrGlcpSysRstpll.lo & (1 << RSTPLL_LOWER_SWFLAGS_SHIFT))) {
print_debug("Configuring PLL\n");
if (manualconf) {
post_code(POST_PLL_MANUAL);
/* CPU and GLIU mult/div (GLMC_CLK = GLIU_CLK / 2) */
msrGlcpSysRstpll.hi = PLLMSRhi;
/* Hold Count - how long we will sit in reset */
msrGlcpSysRstpll.lo = PLLMSRlo;
} else {
/*automatic configuration (straps) */
post_code(POST_PLL_STRAP);
msrGlcpSysRstpll.lo &=
~(0xFF << RSTPPL_LOWER_HOLD_COUNT_SHIFT);
msrGlcpSysRstpll.lo |=
(0xDE << RSTPPL_LOWER_HOLD_COUNT_SHIFT);
msrGlcpSysRstpll.lo &=
~(RSTPPL_LOWER_COREBYPASS_SET |
RSTPPL_LOWER_MBBYPASS_SET);
msrGlcpSysRstpll.lo |=
RSTPPL_LOWER_COREPD_SET | RSTPPL_LOWER_CLPD_SET;
}
/* Use SWFLAGS to remember: "we've already been here" */
msrGlcpSysRstpll.lo |= (1 << RSTPLL_LOWER_SWFLAGS_SHIFT);
/* "reset the chip" value */
msrGlcpSysRstpll.lo |= RSTPPL_LOWER_CHIP_RESET_SET;
wrmsr(GLCP_SYS_RSTPLL, msrGlcpSysRstpll);
/* You should never get here..... The chip has reset. */
print_debug("CONFIGURING PLL FAILURE\n");
post_code(POST_PLL_RESET_FAIL);
__asm__ __volatile__("hlt\n");
}
print_debug("Done pll_reset\n");
return;
}
#if 0 // Unused
static unsigned int CPUSpeed(void)
{
unsigned int speed;
msr_t msr;
msr = rdmsr(GLCP_SYS_RSTPLL);
speed = ((((msr.hi >> RSTPLL_UPPER_CPUMULT_SHIFT) & 0x1F) + 1) * 333) / 10;
if ((((((msr.hi >> RSTPLL_UPPER_CPUMULT_SHIFT) & 0x1F) + 1) * 333) % 10) > 5) {
++speed;
}
return (speed);
}
#endif
static unsigned int GeodeLinkSpeed(void)
{
unsigned int speed;
msr_t msr;
msr = rdmsr(GLCP_SYS_RSTPLL);
speed = ((((msr.hi >> RSTPLL_UPPER_GLMULT_SHIFT) & 0x1F) + 1) * 333) / 10;
if ((((((msr.hi >> RSTPLL_UPPER_GLMULT_SHIFT) & 0x1F) + 1) * 333) % 10) > 5) {
++speed;
}
return (speed);
}
#if 0 // Unused
static unsigned int PCISpeed(void)
{
msr_t msr;
msr = rdmsr(GLCP_SYS_RSTPLL);
if (msr.hi & (1 << RSTPPL_LOWER_PCISPEED_SHIFT)) {
return (66);
} else {
return (33);
}
}
#endif
|
