diff options
| author | Nico Huber <nico.h@gmx.de> | 2017-10-02 20:07:53 +0200 |
|---|---|---|
| committer | Nico Huber <nico.h@gmx.de> | 2017-10-03 19:48:01 +0000 |
| commit | ca3e121607d7cc04dd1da7b2e40d7a4d9fa039bb (patch) | |
| tree | 8b044fccb9d0c24fbd0b5395808375970c354a0b /src/northbridge | |
| parent | 29922a540922550b80ba76a821c85eae328899cc (diff) | |
nb/intel/gm45: Remove UMA alignment optimization
This code path was only triggered in one corner case: GFX UMA set to
48MiB. It created a hole below UMA to save MTRRs. But, this hole was
never accounted for when calculating cbmem_top(). Instead of trying
to fix it, remove it, it's not worth the trouble.
TEST=Booted lenovo/x200 with all available CMOS gfx_uma_size settings.
Change-Id: I3f4ceec4224d86113be9bfa3ce4759bed584640d
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/21847
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Diffstat (limited to 'src/northbridge')
| -rw-r--r-- | src/northbridge/intel/gm45/northbridge.c | 10 | ||||
| -rw-r--r-- | src/northbridge/intel/gm45/raminit.c | 4 |
2 files changed, 3 insertions, 11 deletions
diff --git a/src/northbridge/intel/gm45/northbridge.c b/src/northbridge/intel/gm45/northbridge.c index 3cb7d11f50..8215979267 100644 --- a/src/northbridge/intel/gm45/northbridge.c +++ b/src/northbridge/intel/gm45/northbridge.c @@ -71,7 +71,7 @@ static int decode_pcie_bar(u32 *const base, u32 *const len) static void mch_domain_read_resources(device_t dev) { u64 tom, touud; - u32 tomk, tolud, uma_sizek = 0, usable_tomk; + u32 tomk, tolud, uma_sizek = 0; u32 pcie_config_base, pcie_config_size; /* Total Memory 2GB example: @@ -130,16 +130,12 @@ static void mch_domain_read_resources(device_t dev) uma_sizek = gms_sizek + gsm_sizek; } - usable_tomk = ALIGN_DOWN(tomk, 64 << 10); - if (tomk - usable_tomk > (16 << 10)) - usable_tomk = tomk; - - printk(BIOS_INFO, "Available memory below 4GB: %uM\n", usable_tomk >> 10); + printk(BIOS_INFO, "Available memory below 4GB: %uM\n", tomk >> 10); /* Report the memory regions */ ram_resource(dev, 3, 0, legacy_hole_base_k); ram_resource(dev, 4, legacy_hole_base_k + legacy_hole_size_k, - (usable_tomk - (legacy_hole_base_k + legacy_hole_size_k))); + (tomk - (legacy_hole_base_k + legacy_hole_size_k))); /* * If >= 4GB installed then memory from TOLUD to 4GB diff --git a/src/northbridge/intel/gm45/raminit.c b/src/northbridge/intel/gm45/raminit.c index d2da3b02ab..a44e3975be 100644 --- a/src/northbridge/intel/gm45/raminit.c +++ b/src/northbridge/intel/gm45/raminit.c @@ -1241,10 +1241,6 @@ static void program_memory_map(const dimminfo_t *const dimms, const channel_mode printk(BIOS_DEBUG, " and %uM GTT\n", gsm_sizek >> 10); uma_sizem = (gms_sizek + gsm_sizek) >> 10; - /* Further reduce MTRR usage if it costs use less than - 16 MiB. */ - if (ALIGN_UP(uma_sizem, 64) - uma_sizem <= 16) - uma_sizem = ALIGN_UP(uma_sizem, 64); } } |