[edk2-devel] [PATCH 1/4] DynamicTablesPkg: AcpiSsdtPcieLibArm: Correct translation value

[PierreGondois]

Hello Jeff,
The patch is correct, but there will be an issue if
AddrMapInfo->CpuAddress - AddrMapInfo->PciAddress < 0

AmlCodeGenRdDWordIo() takes an 'IsPosDecode' argment,
would it be possible to set IsPosDecode to FALSE in such case ?

Regards,
Pierre

On 6/30/22 17:48, Jeff Brasen wrote:
> The translation value in ACPI should be the difference between the CPU and PCIe address.
> 
> Signed-off-by: Jeff Brasen <jbrasen at nvidia.com>
> ---
>   .../Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
> index a34018151f..f0d15f69a4 100644
> --- a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
> +++ b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
> @@ -621,7 +621,7 @@ GeneratePciCrs (
>                      0,
>                      AddrMapInfo->PciAddress,
>                      AddrMapInfo->PciAddress + AddrMapInfo->AddressSize - 1,
> -                   Translation ? AddrMapInfo->CpuAddress : 0,
> +                   Translation ? AddrMapInfo->CpuAddress - AddrMapInfo->PciAddress : 0,
>                      AddrMapInfo->AddressSize,
>                      0,
>                      NULL,
> @@ -643,7 +643,7 @@ GeneratePciCrs (
>                      0,
>                      AddrMapInfo->PciAddress,
>                      AddrMapInfo->PciAddress + AddrMapInfo->AddressSize - 1,
> -                   Translation ? AddrMapInfo->CpuAddress : 0,
> +                   Translation ? AddrMapInfo->CpuAddress - AddrMapInfo->PciAddress : 0,
>                      AddrMapInfo->AddressSize,
>                      0,
>                      NULL,
> @@ -665,7 +665,7 @@ GeneratePciCrs (
>                      0,
>                      AddrMapInfo->PciAddress,
>                      AddrMapInfo->PciAddress + AddrMapInfo->AddressSize - 1,
> -                   Translation ? AddrMapInfo->CpuAddress : 0,
> +                   Translation ? AddrMapInfo->CpuAddress - AddrMapInfo->PciAddress : 0,
>                      AddrMapInfo->AddressSize,
>                      0,
>                      NULL,


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