On 6/24/20 3:34 PM, Sami Mujawar wrote:
> Introduce a new GUID Hob gEarly16550UartBaseAddressGuid
> to cache the base address of the 16550 UART, for when
> PCD access is not available.
>
> Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
> ---
> ArmVirtPkg/ArmVirtPkg.dec | 2 ++
> ArmVirtPkg/Include/Guid/Early16550UartBaseAddress.h | 22 ++++++++++++++++++++
> 2 files changed, 24 insertions(+)
>
> diff --git a/ArmVirtPkg/ArmVirtPkg.dec b/ArmVirtPkg/ArmVirtPkg.dec
> index 08ddd68a863eb82778fa7a92b20ac1bff271f5e5..bf82f7f1f3f2a0ce545d87fa93350f56de78328b 100644
> --- a/ArmVirtPkg/ArmVirtPkg.dec
> +++ b/ArmVirtPkg/ArmVirtPkg.dec
> @@ -1,6 +1,7 @@
> #/** @file
> #
> # Copyright (c) 2014, Linaro Limited. All rights reserved.
> +# Copyright (c) 2020, ARM Limited. All rights reserved.
> #
> # SPDX-License-Identifier: BSD-2-Clause-Patent
> #
> @@ -30,6 +31,7 @@ [LibraryClasses]
> [Guids.common]
> gArmVirtTokenSpaceGuid = { 0x0B6F5CA7, 0x4F53, 0x445A, { 0xB7, 0x6E, 0x2E, 0x36, 0x5B, 0x80, 0x63, 0x66 } }
> gEarlyPL011BaseAddressGuid = { 0xB199DEA9, 0xFD5C, 0x4A84, { 0x80, 0x82, 0x2F, 0x41, 0x70, 0x78, 0x03, 0x05 } }
> + gEarly16550UartBaseAddressGuid = { 0xea67ca3e, 0x1f54, 0x436b, { 0x97, 0x88, 0xd4, 0xeb, 0x29, 0xc3, 0x42, 0x67 } }
>
> gArmVirtVariableGuid = { 0x50bea1e5, 0xa2c5, 0x46e9, { 0x9b, 0x3a, 0x59, 0x59, 0x65, 0x16, 0xb0, 0x0a } }
>
> diff --git a/ArmVirtPkg/Include/Guid/Early16550UartBaseAddress.h b/ArmVirtPkg/Include/Guid/Early16550UartBaseAddress.h
> new file mode 100644
> index 0000000000000000000000000000000000000000..6b76f37a27dac03d6749f31a03e8026023231056
> --- /dev/null
> +++ b/ArmVirtPkg/Include/Guid/Early16550UartBaseAddress.h
> @@ -0,0 +1,22 @@
> +/** @file
> + GUID for the HOB that caches the base address of the 16550 serial port, for
> + when PCD access is not available.
> +
> + Copyright (c) 2020, ARM Limited. All rights reserved.
> +
> + SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#ifndef EARLY_16550_UART_BASE_ADDRESS_H__
> +#define EARLY_16550_UART_BASE_ADDRESS_H__
> +
> +#define EARLY_16550_UART_BASE_ADDRESS_GUID { \
> + 0xea67ca3e, 0x1f54, 0x436b, { \
> + 0x97, 0x88, 0xd4, 0xeb, 0x29, 0xc3, 0x42, 0x67 \
> + } \
> + }
> +
> +extern EFI_GUID gEarly16550UartBaseAddressGuid;
> +
> +#endif // EARLY_16550_UART_BASE_ADDRESS_H__
>
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