diff options
| author | Raul E Rangel <rrangel@chromium.org> | 2021-02-24 16:21:00 -0700 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2021-03-02 22:17:20 +0000 |
| commit | b825acb95884acae5e76fe319baf01e9cd64db33 (patch) | |
| tree | 5b1fe77868d71a28bba311c97ec293eaf1886607 /src/soc/amd | |
| parent | c8c83ce0270e1564e37de3dbc7687ec2e3e6587e (diff) | |
soc/amd/cezanne: Disable legacy DMA IO ports
The legacy DMA is not used by linux. This change frees up those IO
ports.
When FSP-S runs, it re-enables the legacy DMA IO region, so we need to
disable it again.
BOOTBLOCK: PMx00: 0xe3060bf3
ROMSTAGE - Before FSP: PMx00: 0xe3060bf3
ROMSTAGE - After FSP: PMx00: 0xe3060bf7
BUG=b:180949454
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I7792d1f8ea40eb1c7f6cca67e9907208884ac694
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51076
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/amd')
| -rw-r--r-- | src/soc/amd/cezanne/early_fch.c | 1 | ||||
| -rw-r--r-- | src/soc/amd/cezanne/romstage.c | 4 |
2 files changed, 5 insertions, 0 deletions
diff --git a/src/soc/amd/cezanne/early_fch.c b/src/soc/amd/cezanne/early_fch.c index dd096e05e8..cdb1f12aad 100644 --- a/src/soc/amd/cezanne/early_fch.c +++ b/src/soc/amd/cezanne/early_fch.c @@ -17,6 +17,7 @@ void fch_pre_init(void) fch_smbus_init(); fch_enable_cf9_io(); fch_enable_legacy_io(); + fch_disable_legacy_dma_io(); enable_aoac_devices(); /* diff --git a/src/soc/amd/cezanne/romstage.c b/src/soc/amd/cezanne/romstage.c index 2740d8c74c..b35e6a56af 100644 --- a/src/soc/amd/cezanne/romstage.c +++ b/src/soc/amd/cezanne/romstage.c @@ -1,6 +1,7 @@ /* SPDX-License-Identifier: GPL-2.0-only */ #include <acpi/acpi.h> +#include <amdblocks/acpimmio.h> #include <amdblocks/memmap.h> #include <arch/cpu.h> #include <console/console.h> @@ -31,6 +32,9 @@ asmlinkage void car_stage_entry(void) fsp_memory_init(acpi_is_wakeup_s3()); + /* Fixup settings FSP-M should not be changing */ + fch_disable_legacy_dma_io(); + memmap_stash_early_dram_usage(); run_ramstage(); |