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gen_part_id.go
This change adds mem_list_variant.txt that contains the list of
memory parts used by halvor and Makefile.inc generated by
gen_part_id.go using mem_list_variant.txt.
In the final change of the series, all volteer variants will be
switched from using the current SPDs to new auto-generated SPDs.
Differences in auto-generated SPD from current SPD are as follows:
Part: H9HKNNNCRMBVAR-NEH
Byte# Current New Explanation
4 0x16 0x15 As per datasheet, density is 8Gb per
logical channel. So value should be 0x15.
6 0xB9 0x94 Signal loading is not used by
MRC. Set bits 1:0 to 00. 2 channels 2
dies. Hence, 0x94
19 0x0F 0xFF As per JEDEC spec, tckMax should be
100ns. So, value should be 0xff as
per datasheet.
29,30 0xE0,0x0B 0xC0,0x08 As per datasheet, this corresponds to
280ns in MTB units which is 0x08C0.
31,32 0xF0,0x05 0x60,0x04 As per datasheet, this corresponds to
140ns in MTB units which is 0x0460.
125 0xE1 0xE0 Fine offset for tckMin. tckMin is
calculated as (1/4267)*2 which comes
out to be 0.46871. Some datasheets
round this down to 0.468 and others
round it up to 0.469. JEDEC spec uses
0.468. As per that, this value comes
out to be 0xE0.
Part: MT53E1G64D4SQ-046 WT:A
Byte# Current New Explanation
5 0x21 0x29 As per datasheet, this part has 17row
address bits and 10column address
bits. This results in 0x29.
6 0xB9 0x94 Signal loading is not used by
MRC. Set bits 1:0 to 00. 2 channels,
2 dies. Hence, 0x94.
19 0x0F 0xFF As per JEDEC spec, tckMax should be
100ns. So, value should be 0xff as
per datasheet.
125 0xE1 0xE0 Fine offset for tckMin. As per
datasheet tckMin is 0.468ns. So, this
comes out to be 0xE0.
BUG=b:147321551,b:155423877
Change-Id: I28b065a00380516d8686279a92ef68b9f17e2f65
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41616
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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