diff options
| author | Angel Pons <th3fanbus@gmail.com> | 2020-10-29 21:39:52 +0100 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2021-02-01 08:50:08 +0000 |
| commit | 849104f2fb32188185d276ba68166a6537ed69c9 (patch) | |
| tree | ddc87a396d161357b316e645b2dbadc062a6db93 /src/northbridge | |
| parent | be6ad1ace05e5d353f3718dbc0d0235d15df5e4e (diff) | |
nb/intel/haswell: Create RMRR for iGPU
Taken from Broadwell.
Change-Id: I246fdc1473bf8949073377d03622026bd3e6aafa
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46990
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Diffstat (limited to 'src/northbridge')
| -rw-r--r-- | src/northbridge/intel/haswell/acpi.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/src/northbridge/intel/haswell/acpi.c b/src/northbridge/intel/haswell/acpi.c index 060110048f..96448f3110 100644 --- a/src/northbridge/intel/haswell/acpi.c +++ b/src/northbridge/intel/haswell/acpi.c @@ -26,8 +26,13 @@ static unsigned long acpi_fill_dmar(unsigned long current) const bool vtvc0en = MCHBAR32(VTVC0BAR) & 0x1; /* iGFX has to be enabled; GFXVTBAR set, enabled, in 32-bit space */ - if (igfx_dev && igfx_dev->enabled && gfxvtbar && gfxvten && !MCHBAR32(GFXVTBAR + 4)) { + const bool emit_igd = + igfx_dev && igfx_dev->enabled && + gfxvtbar && gfxvten && + !MCHBAR32(GFXVTBAR + 4); + /* First, add DRHD entries */ + if (emit_igd) { const unsigned long tmp = current; current += acpi_create_dmar_drhd(current, 0, 0, gfxvtbar); @@ -51,6 +56,21 @@ static unsigned long acpi_fill_dmar(unsigned long current) acpi_dmar_drhd_fixup(tmp, current); } + /* Then, add RMRR entries after all DRHD entries */ + if (emit_igd) { + const unsigned long tmp = current; + + const struct device *sa_dev = pcidev_on_root(0, 0); + + /* Bit 0 is lock bit, not part of address */ + const u32 tolud = pci_read_config32(sa_dev, TOLUD) & ~1; + const u32 bgsm = pci_read_config32(sa_dev, BGSM) & ~1; + + current += acpi_create_dmar_rmrr(current, 0, bgsm, tolud - 1); + current += acpi_create_dmar_ds_pci(current, 0, 2, 0); + acpi_dmar_rmrr_fixup(tmp, current); + } + return current; } |