diff options
| author | Arthur Heymans <arthur@aheymans.xyz> | 2019-01-12 01:38:02 +0100 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2019-01-14 12:10:14 +0000 |
| commit | da44e34743a758aaf9cfa3eac5cf1278297e27e4 (patch) | |
| tree | aad2025b31c7d0fa0c6cfe2dff4d8c9c69780dd5 /src/northbridge/intel/pineview/raminit.c | |
| parent | 786a1fec27824632dc441582b5edb2cf9305a1b5 (diff) | |
nb/intel/pineview: Select 1M TSEG
With the only valid GTT setting being 1M, TSEG_BASE can only be
aligned to TSEG_SIZE if it is also 1M. This alignment requirement
comes from the desire to use SMRR to protect the SMM RAM.
Tested on Foxconn D41S.
Change-Id: Ibd879529923a1676f2e78500797a52d8a37b8eef
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/30869
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Diffstat (limited to 'src/northbridge/intel/pineview/raminit.c')
| -rw-r--r-- | src/northbridge/intel/pineview/raminit.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/northbridge/intel/pineview/raminit.c b/src/northbridge/intel/pineview/raminit.c index 3413cc16e8..ee19b61841 100644 --- a/src/northbridge/intel/pineview/raminit.c +++ b/src/northbridge/intel/pineview/raminit.c @@ -2032,9 +2032,9 @@ static void sdram_mmap_regs(struct sysinfo *s) gttsize = ggc_to_gtt[(ggc & 0x300) >> 8]; tom = s->channel_capacity[0]; - /* TSEG 2M, This amount can easily be covered by SMRR MTRR's, - which requires to have TSEG_BASE aligned to TSEG_SIZE. */ - tsegsize = 0x2; + /* with GTT always being 1M, TSEG 1M is the only setting that can + be covered by SMRR which has alignment requirements. */ + tsegsize = 0x1; mmiosize = 0x400; // 1GB reclaim = false; @@ -2071,7 +2071,7 @@ static void sdram_mmap_regs(struct sysinfo *s) u8 reg8 = pci_read_config8(PCI_DEV(0, 0, 0), ESMRAMC); reg8 &= ~0x7; - reg8 |= (1 << 1) | (1 << 0); /* 2M and TSEG_Enable */ + reg8 |= (0 << 1) | (1 << 0); /* 1M and TSEG_Enable */ pci_write_config8(PCI_DEV(0, 0, 0), ESMRAMC, reg8); printk(BIOS_DEBUG, "GBSM (igd) = verified %08x (written %08x)\n", |