diff options
| author | Tim Chu <Tim.Chu@quantatw.com> | 2022-12-08 06:37:06 +0000 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2023-01-31 15:19:45 +0000 |
| commit | dbbcc578c3fcf6a7a37ad50f380978d805250428 (patch) | |
| tree | dff3ed910195e3a3f452d29af920325e1bbdd701 | |
| parent | 2c1511a461cd6dde750090e0337bf3f893710dc1 (diff) | |
soc/intel/common/block: Add LPC BIOS decode lock
The LPC BIOS decode lock bit is defined in EBG EDS documentation.
Signed-off-by: Tim Chu <Tim.Chu@quantatw.com>
Change-Id: I60df7e6da2b22b8eeb2094aeb5ee9667043bb30b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71954
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
| -rw-r--r-- | src/soc/intel/common/block/include/intelblocks/lpc_lib.h | 2 | ||||
| -rw-r--r-- | src/soc/intel/common/block/lpc/lpc_def.h | 2 | ||||
| -rw-r--r-- | src/soc/intel/common/block/lpc/lpc_lib.c | 10 |
3 files changed, 14 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/include/intelblocks/lpc_lib.h b/src/soc/intel/common/block/include/intelblocks/lpc_lib.h index 7d033677aa..0c4780b89c 100644 --- a/src/soc/intel/common/block/include/intelblocks/lpc_lib.h +++ b/src/soc/intel/common/block/include/intelblocks/lpc_lib.h @@ -61,6 +61,8 @@ void lpc_set_bios_interface_lock_down(void); void lpc_set_lock_enable(void); /* Set LPC BIOS Control EISS bit. */ void lpc_set_eiss(void); +/* Set LPC BIOS Decode LE bit */ +void lpc_set_bde(void); /* Set LPC Serial IRQ mode. */ void lpc_set_serirq_mode(enum serirq_mode mode); /* Enable CLKRUN_EN for power gating LPC. */ diff --git a/src/soc/intel/common/block/lpc/lpc_def.h b/src/soc/intel/common/block/lpc/lpc_def.h index b73cc567a8..385f307a69 100644 --- a/src/soc/intel/common/block/lpc/lpc_def.h +++ b/src/soc/intel/common/block/lpc/lpc_def.h @@ -27,6 +27,8 @@ #define LPC_LGMR_ADDR_MASK 0xffff0000 #define LPC_LGMR_EN (1 << 0) #define LPC_LGMR_WINDOW_SIZE (64 * KiB) +#define LPC_BIOS_DECODE_EN 0xd8 +#define LPC_BIOS_DECODE_LOCK (1 << 31) #define LPC_BIOS_CNTL 0xdc #define LPC_BC_BILD (1 << 7) /* BILD */ #define LPC_BC_LE (1 << 1) /* LE */ diff --git a/src/soc/intel/common/block/lpc/lpc_lib.c b/src/soc/intel/common/block/lpc/lpc_lib.c index c820203d6d..ed76049b6d 100644 --- a/src/soc/intel/common/block/lpc/lpc_lib.c +++ b/src/soc/intel/common/block/lpc/lpc_lib.c @@ -298,6 +298,16 @@ void lpc_disable_wp(void) lpc_configure_write_protect(false); } +void lpc_set_bde(void) +{ + const pci_devfn_t dev = PCH_DEV_LPC; + uint32_t bde; + + bde = pci_read_config32(dev, LPC_BIOS_DECODE_EN); + bde |= LPC_BIOS_DECODE_LOCK; + pci_write_config32(dev, LPC_BIOS_DECODE_EN, bde); +} + /* * Set LPC Serial IRQ mode. */ |