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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/import/generic/memory/lib/spd/spd_utils.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2018,2020 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
///
/// @file spd_utls.C
/// @brief SPD utility function implimentations
///
// *HWP HWP Owner: Andre Marin <aamarin@us.ibm.com>
// *HWP HWP Backup: Stephen Glancy <sglancy@us.ibm.com>
// *HWP Team: Memory
// *HWP Level: 3
// *HWP Consumed by: HB:FSP
#include <generic/memory/lib/spd/spd_utils.H>
#include <generic/memory/lib/utils/find.H>
#include <generic/memory/lib/utils/shared/mss_generic_consts.H>
namespace mss
{
namespace spd
{
///
/// @brief Helper function to retrieves medium and fine timebase values
/// @param[in] i_spd_decoder the SPD decoder
/// @param[out] o_mtb the medium timebase (MTB) from SPD
/// @param[out] o_ftb the fine timebase (FTB) from SPD
/// @return FAPI2_RC_SUCCESS iff ok
///
fapi2::ReturnCode get_timebases( const mss::spd::facade& i_spd_decoder,
int64_t& o_mtb,
int64_t& o_ftb )
{
// =========================================================
// Byte 17 maps
// Item JC-45-2220.01x
// Page 29
// DDR4 SPD Document Release 3
// Byte 17 (0x011): Timebases
// =========================================================
// Created a maps of a single value in case mapping expands to more values
static const std::vector<std::pair<int64_t, int64_t> > FINE_TIMEBASE_MAP =
{
// {key byte, fine timebase (in picoseconds)
{0, 1}
// All others reserved
};
// =========================================================
// Byte 17 maps
// Item JC-45-2220.01x
// Page 29
// DDR4 SPD Document Release 3
// Byte 17 (0x011): Timebases
// =========================================================
// Created a maps of a single value in case mapping expands to more values
static const std::vector<std::pair<int64_t, int64_t> > MEDIUM_TIMEBASE_MAP =
{
// {key byte, medium timebase (in picoseconds)
{0, 125}
// All others reserved
};
// Retrieve timing parameters
const auto l_target = i_spd_decoder.get_dimm_target();
int64_t l_spd_ftb = 0;
int64_t l_spd_mtb = 0;
FAPI_TRY( i_spd_decoder.medium_timebase(l_spd_mtb),
"%s. Failed medium_timebase()", spd::c_str(l_target) );
FAPI_ASSERT( mss::find_value_from_key(MEDIUM_TIMEBASE_MAP, l_spd_mtb, o_mtb),
fapi2::MSS_LOOKUP_FAILED()
.set_KEY(l_spd_mtb)
.set_DATA(o_mtb)
.set_FUNCTION(GET_TIMEBASES_MTB)
.set_TARGET(l_target),
"Could not find a mapped value that matched the key (%d) for %s",
l_spd_mtb, spd::c_str(l_target) );
FAPI_TRY( i_spd_decoder.fine_timebase(l_spd_ftb),
"%s. Failed fine_timebase()", spd::c_str(l_target) );
FAPI_ASSERT( mss::find_value_from_key(FINE_TIMEBASE_MAP, l_spd_ftb, o_ftb),
fapi2::MSS_LOOKUP_FAILED()
.set_KEY(l_spd_ftb)
.set_DATA(o_ftb)
.set_FUNCTION(GET_TIMEBASES_FTB)
.set_TARGET(l_target),
"Could not find a mapped value that matched the key (%d) for %s",
l_spd_ftb, spd::c_str(l_target) );
FAPI_DBG("MTB: %d, FTB: %d for %s", o_mtb, o_ftb, spd::c_str(l_target));
fapi_try_exit:
return fapi2::current_err;
}
///
/// @brief Retrieves SDRAM Minimum Cycle Time (tCKmin) from SPD
/// @param[in] i_spd_decoder the SPD decoder
/// @param[out] o_value tCKmin value in ps
/// @return FAPI2_RC_SUCCESS iff ok
///
fapi2::ReturnCode get_tckmin( const mss::spd::facade& i_spd_decoder,
uint64_t& o_value )
{
int64_t l_timing_ftb = 0;
int64_t l_timing_mtb = 0;
int64_t l_medium_timebase = 0;
int64_t l_fine_timebase = 0;
int64_t l_temp = 0;
// Retrieve timing parameters
const auto l_target = i_spd_decoder.get_dimm_target();
FAPI_TRY( get_timebases(i_spd_decoder, l_medium_timebase, l_fine_timebase),
"%s. Failed get_timebases", spd::c_str(l_target) );
FAPI_TRY( i_spd_decoder.min_tck(l_timing_mtb),
"%s. Failed min_tck()", spd::c_str(l_target) );
FAPI_TRY( i_spd_decoder.fine_offset_min_tck(l_timing_ftb),
"%s. Failed fine_offset_min_tck()", spd::c_str(l_target) );
// Calculate timing value
l_temp = spd::calc_timing_from_timebase(l_timing_mtb,
l_medium_timebase,
l_timing_ftb,
l_fine_timebase);
// Sanity check
FAPI_ASSERT(l_temp > 0,
fapi2::MSS_INVALID_TIMING_VALUE().
set_VALUE(l_temp).
set_FUNCTION(GET_TCKMIN).
set_DIMM_TARGET(l_target),
"%s. tCKmin invalid (<= 0) : %d",
spd::c_str(l_target),
l_temp);
o_value = l_temp;
FAPI_DBG("%s. tCKmin (ps): %d",
spd::c_str(l_target),
o_value );
fapi_try_exit:
return fapi2::current_err;
}
///
/// @brief Retrieves SDRAM Maximum Cycle Time (tCKmax) from SPD
/// @param[in] i_spd_decoder SPD decoder
/// @param[out] o_value tCKmax value in ps
/// @return FAPI2_RC_SUCCESS iff ok
///
fapi2::ReturnCode get_tckmax( const mss::spd::facade& i_spd_decoder,
uint64_t& o_value )
{
int64_t l_timing_ftb = 0;
int64_t l_timing_mtb = 0;
int64_t l_medium_timebase = 0;
int64_t l_fine_timebase = 0;
int64_t l_temp = 0;
// Retrieve timing parameters
const auto l_target = i_spd_decoder.get_dimm_target();
FAPI_TRY( get_timebases(i_spd_decoder, l_medium_timebase, l_fine_timebase),
"%s. Failed get_timebases", spd::c_str(l_target) );
FAPI_TRY( i_spd_decoder.max_tck(l_timing_mtb),
"%s. Failed max_tck()", spd::c_str(l_target) );
FAPI_TRY( i_spd_decoder.fine_offset_max_tck(l_timing_ftb),
"%s. Failed fine_offset_max_tck()", spd::c_str(l_target) );
// Calculate timing value
l_temp = spd::calc_timing_from_timebase(l_timing_mtb,
l_medium_timebase,
l_timing_ftb,
l_fine_timebase);
// Sanity check
FAPI_ASSERT(l_temp > 0,
fapi2::MSS_INVALID_TIMING_VALUE().
set_VALUE(l_temp).
set_FUNCTION(GET_TCKMAX).
set_DIMM_TARGET(l_target),
"%s. tCKmax invalid (<= 0) : %d",
spd::c_str(l_target),
l_temp);
o_value = l_temp;
FAPI_DBG( "%s. tCKmax (ps): %d",
spd::c_str(l_target),
o_value);
fapi_try_exit:
return fapi2::current_err;
}
}// spd
}// mss
|
