diff options
Diffstat (limited to 'roms/u-boot/arch/x86/include/asm/acpi/pcr.asl')
-rw-r--r-- | roms/u-boot/arch/x86/include/asm/acpi/pcr.asl | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/roms/u-boot/arch/x86/include/asm/acpi/pcr.asl b/roms/u-boot/arch/x86/include/asm/acpi/pcr.asl new file mode 100644 index 000000000..f66737b89 --- /dev/null +++ b/roms/u-boot/arch/x86/include/asm/acpi/pcr.asl @@ -0,0 +1,80 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2015 Google Inc. + * Copyright (C) 2018 Intel Corporation. + */ + +#include <intelblocks/pcr.h> + +/* + * Calculate PCR register base at specified PID + * Arg0 - PCR Port ID + */ +Method (PCRB, 1, NotSerialized) +{ + Return (Add (IOMAP_P2SB_BAR, + ShiftLeft (Arg0, PCR_PORTID_SHIFT))) +} + +/* + * Read a PCR register at specified PID and offset + * Arg0 - PCR Port ID + * Arg1 - Register Offset + */ +Method (PCRR, 2, Serialized) +{ + OperationRegion (PCRD, SystemMemory, Add (PCRB (Arg0), Arg1), 4) + Field (PCRD, DWordAcc, NoLock, Preserve) + { + DATA, 32 + } + Return (DATA) +} + +/* + * AND a value with PCR register at specified PID and offset + * Arg0 - PCR Port ID + * Arg1 - Register Offset + * Arg2 - Value to AND + */ +Method (PCRA, 3, Serialized) +{ + OperationRegion (PCRD, SystemMemory, Add (PCRB (Arg0), Arg1), 4) + Field (PCRD, DWordAcc, NoLock, Preserve) + { + DATA, 32 + } + And (DATA, Arg2, DATA) + + /* + * After every write one needs to read an innocuous register + * to ensure the writes are completed for certain ports. This is done + * for all ports so that the callers don't need the per-port knowledge + * for each transaction. + */ + PCRR (Arg0, Arg1) +} + +/* + * OR a value with PCR register at specified PID and offset + * Arg0 - PCR Port ID + * Arg1 - Register Offset + * Arg2 - Value to OR + */ +Method (PCRO, 3, Serialized) +{ + OperationRegion (PCRD, SystemMemory, Add (PCRB (Arg0), Arg1), 4) + Field (PCRD, DWordAcc, NoLock, Preserve) + { + DATA, 32 + } + Or (DATA, Arg2, DATA) + + /* + * After every write one needs to read an innocuous register + * to ensure the writes are completed for certain ports. This is done + * for all ports so that the callers don't need the per-port knowledge + * for each transaction. + */ + PCRR (Arg0, Arg1) +} |