coreboot
coreboot is an Open Source project aimed at replacing the proprietary BIOS found in most computers.
spd_util.c
Go to the documentation of this file.
1
/* SPDX-License-Identifier: GPL-2.0-only */
2
3
#include <
console/console.h
>
4
#include <
mainboard/google/cyan/spd/spd_util.h
>
5
6
/* We use RAM_ID3 to indicate dual channel config.
7
*
8
* 0b0000 - 2GiB total - 1 x 2GiB Samsung K4E8E304EE-EGCF 1600MHz
9
* 0b0001 - 2GiB total - 1 x 2GiB Hynix H9CCNNN8GTMLAR-NUD 1600MHz
10
* 0b0010 - 2GiB total - 1 x 2GiB micron MT52L256M32D1PF-107 1600MHz
11
* 0b0011 - 2GiB total - 1 x 2GiB Samsung K4E8E324EB-EGCF 1600MHz
12
* 0b0100 - 2GiB total - 1 x 2GiB Micron EDF8132A3MA-JD-F 1600MHz
13
*
14
* 0b1000 - 4GiB total - 2 x 2GiB Samsung K4E8E304EE-EGCF 1600MHz
15
* 0b1001 - 4GiB total - 2 x 2GiB Hynix H9CCNNN8GTMLAR-NUD 1600MHz
16
* 0b1010 - 4GiB total - 2 x 2GiB micron MT52L256M32D1PF-107 1600MHz
17
* 0b1011 - 4GiB total - 2 x 2GiB Samsung K4E8E324EB-EGCF 1600MHz
18
* 0b1100 - 4GiB total - 2 x 2GiB Micron EDF8132A3MA-JD-F 1600MHz
19
*
20
*/
21
22
int
get_variant_spd_index
(
int
ram_id,
int
*dual)
23
{
24
int
spd_index
= ram_id & 0x7;
25
26
/* Determine if single or dual channel memory system */
27
/* RAMID3 is deterministic for reks */
28
*dual = ((ram_id >> 3) & 0x1) ? 1 : 0;
29
30
/* Display the RAM type */
31
printk
(
BIOS_DEBUG
, *dual ?
"4GiB "
:
"2GiB "
);
32
switch
(
spd_index
) {
33
case
0:
34
printk
(
BIOS_DEBUG
,
"Samsung K4E8E304EE-EGCF\n"
);
35
break
;
36
case
1:
37
printk
(
BIOS_DEBUG
,
"Hynix H9CCNNN8GTMLAR-NUD\n"
);
38
break
;
39
case
2:
40
printk
(
BIOS_DEBUG
,
"Micron MT52L256M32D1PF-107\n"
);
41
break
;
42
case
3:
43
printk
(
BIOS_DEBUG
,
"Samsung K4E8E324EB-EGCF\n"
);
44
break
;
45
case
4:
46
printk
(
BIOS_DEBUG
,
"Micron EDF8132A3MA-JD-F\n"
);
47
break
;
48
}
49
50
return
spd_index
;
51
}
printk
#define printk(level,...)
Definition:
stdlib.h:16
console.h
spd_util.h
get_variant_spd_index
int get_variant_spd_index(int ram_id, int *dual)
Definition:
spd_util.c:21
BIOS_DEBUG
#define BIOS_DEBUG
BIOS_DEBUG - Verbose output.
Definition:
loglevel.h:128
spd_index
static const int spd_index[32]
Definition:
memory.c:10
src
mainboard
google
cyan
variants
reks
spd_util.c
Generated by
1.9.1