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gm45: enable setting all vram sizes from cmos 

Setting the size of the preallocated memory for the igd is done
using a cmos parameter, gfx_uma_size. This was limited to a subset of
all available sizes, that were already implemented elsewhere
in the northbridge code.

What this does is change the cmos parameter to 4 bits instead
of 3 bits to accomodate all vram sizes.
It also adds a sane default of 32mb that already was in place.
The northbridge code that reads this cmos parameter is
also changed for this new cmos settings.

352M is disabled since it causes issues on systems with 4GB or more ram.

TEST: Build, flash target. Clear cmos by corrupting
the checksum (nvramtool -c something).
Set a desired value in gfx_uma_size using nvramtool.
"dmesg | grep stolen" to see what is actually allocated.

Change-Id: Ia6479d03f1abe6d0c94bd7264365505e8f8eaeec
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/14900
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
This commit is contained in:
Arthur Heymans 2016-05-19 15:34:49 +02:00 committed by Martin Roth
parent 90e63deeba
commit 7afcfe0f9f
6 changed files with 49 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
src/mainboard/lenovo/t400/cmos.default
View File

@ -14,3 +14,4 @@ power_management_beeps=Enable
low_battery_beep=Enable
sata_mode=AHCI
hybrid_graphics_mode=Integrated Only
gfx_uma_size=32M

20
src/mainboard/lenovo/t400/cmos.layout
View File

@ -77,8 +77,8 @@ entries
940 1 e 1 uwb
# coreboot config options: northbridge
941 3 e 11 gfx_uma_size
944 2 e 12 hybrid_graphics_mode
946 4 e 11 gfx_uma_size
# coreboot config options: EC
952 8 h 0 volume
@ -127,12 +127,18 @@ enumerations
9 1 Primary
10 0 AHCI
10 1 Compatible
11 0 32M
11 1 48M
11 2 64M
11 3 128M
11 5 96M
11 6 160M
11 0 1M
11 1 4M
11 2 8M
11 3 16M
11 4 32M
11 5 48M
11 6 64M
11 7 128M
11 8 256M
11 9 96M
11 10 160M
11 11 224M
12 0 Integrated Only
12 1 Discrete Only

1
src/mainboard/lenovo/x200/cmos.default
View File

@ -13,3 +13,4 @@ sticky_fn=Disable
power_management_beeps=Enable
low_battery_beep=Enable
sata_mode=AHCI
gfx_uma_size=32M

21
src/mainboard/lenovo/x200/cmos.layout
View File

@ -77,9 +77,8 @@ entries
940 1 e 1 uwb
# coreboot config options: northbridge
941 3 e 11 gfx_uma_size
944 8 h 0 volume
952 4 e 11 gfx_uma_size
# coreboot config options: check sums
984 16 h 0 check_sum
@ -125,12 +124,18 @@ enumerations
9 1 Primary
10 0 AHCI
10 1 Compatible
11 0 32M
11 1 48M
11 2 64M
11 3 128M
11 5 96M
11 6 160M
11 0 1M
11 1 4M
11 2 8M
11 3 16M
11 4 32M
11 5 48M
11 6 64M
11 7 128M
11 8 256M
11 9 96M
11 10 160M
11 11 224M
# -----------------------------------------------------------------
checksums

23
src/mainboard/roda/rk9/cmos.layout
View File

@ -70,9 +70,9 @@ entries
984 16 h 0 check_sum
# coreboot config options: northbridge
1000 3 e 10 gfx_uma_size
1000 4 e 10 gfx_uma_size
#1003 21 r 0 unused
#1004 20 r 0 unused
# ram initialization internal data
1024 128 r 0 read_training_results
@ -112,13 +112,18 @@ enumerations
8 1 Yes
9 0 AHCI
9 1 Compatible
10 0 32M
10 1 48M
10 2 64M
10 3 128M
10 5 96M
10 6 160M
11 0 1M
11 1 4M
11 2 8M
11 3 16M
11 4 32M
11 5 48M
11 6 64M
11 7 128M
11 8 256M
11 9 96M
11 10 160M
11 11 224M
# -----------------------------------------------------------------
checksums

9
src/northbridge/intel/gm45/igd.c
View File

@ -153,10 +153,13 @@ void igd_compute_ggc(sysinfo_t *const sysinfo)
/* Graphics Stolen Memory: 2MB GTT (0x0300) when VT-d disabled,
2MB GTT + 2MB shadow GTT (0x0b00) else. */
if (get_option(&gfxsize, "gfx_uma_size") != CB_SUCCESS) {
/* 0 for 32MB */
gfxsize = 0;
/* 4 for 32MB, default if not set in cmos */
gfxsize = 4;
}
sysinfo->ggc = 0x0300 | ((gfxsize + 5) << 4);
/* Handle invalid cmos settings */
if (gfxsize > 11)
gfxsize = 4;
sysinfo->ggc = 0x0300 | ((gfxsize + 1) << 4);
if (!(capid & (1 << (48 - 32))))
sysinfo->ggc |= 0x0800;
}