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40a0dbdd18
Parent interrupt controller's address cells is arch specific. So, create a wrapper function which can be implemented differently for different archs. Move current implementation to ARM specific file. Suggested-by: Sunil V L <sunilvl@ventanamicro.com> Signed-off-by: Pierre Gondois <pierre.gondois@arm.com> Reviewed-by: Sami Mujawar <sami.mujawar@arm.com> Reviewed-by: Sunil V L <sunilvl@ventanamicro.com>
119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
/** @file
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Flattened device tree utility.
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Copyright (c) 2021, ARM Limited. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Reference(s):
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- Device tree Specification - Release v0.3
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- linux/Documentation/devicetree/bindings/interrupt-controller/arm%2Cgic.yaml
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- linux//Documentation/devicetree/bindings/interrupt-controller/arm%2Cgic.yaml
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**/
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#include <FdtHwInfoParserInclude.h>
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#include "FdtUtility.h"
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/** Get the interrupt Id of an interrupt described in a fdt.
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Data must describe a GIC interrupt. A GIC interrupt is on at least
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3 UINT32 cells.
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This function DOES NOT SUPPORT extended SPI range and extended PPI range.
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@param [in] Data Pointer to the first cell of an "interrupts" property.
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@retval The interrupt id.
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**/
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UINT32
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EFIAPI
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FdtGetInterruptId (
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UINT32 CONST *Data
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)
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{
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UINT32 IrqType;
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UINT32 IrqId;
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ASSERT (Data != NULL);
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IrqType = fdt32_to_cpu (Data[IRQ_TYPE_OFFSET]);
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IrqId = fdt32_to_cpu (Data[IRQ_NUMBER_OFFSET]);
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switch (IrqType) {
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case DT_SPI_IRQ:
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IrqId += SPI_OFFSET;
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break;
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case DT_PPI_IRQ:
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IrqId += PPI_OFFSET;
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break;
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default:
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ASSERT (0);
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IrqId = 0;
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}
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return IrqId;
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}
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/** Get the ACPI interrupt flags of an interrupt described in a fdt.
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Data must describe a GIC interrupt. A GIC interrupt is on at least
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3 UINT32 cells.
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PPI interrupt cpu mask on bits [15:8] are ignored.
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@param [in] Data Pointer to the first cell of an "interrupts" property.
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@retval The interrupt flags (for ACPI).
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**/
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UINT32
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EFIAPI
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FdtGetInterruptFlags (
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UINT32 CONST *Data
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)
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{
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UINT32 IrqFlags;
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UINT32 AcpiIrqFlags;
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ASSERT (Data != NULL);
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IrqFlags = fdt32_to_cpu (Data[IRQ_FLAGS_OFFSET]);
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AcpiIrqFlags = DT_IRQ_IS_EDGE_TRIGGERED (IrqFlags) ? BIT0 : 0;
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AcpiIrqFlags |= DT_IRQ_IS_ACTIVE_LOW (IrqFlags) ? BIT1 : 0;
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return AcpiIrqFlags;
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}
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/** For relevant architectures, get the "#address-cells" and/or "#size-cells"
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property of the node.
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According to the Device Tree specification, s2.3.5 "#address-cells and
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#size-cells":
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"If missing, a client program should assume a default value of 2 for
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#address-cells, and a value of 1 for #size-cells."
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@param [in] Fdt Pointer to a Flattened Device Tree.
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@param [in] Node Offset of the node having to get the
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"#address-cells" and "#size-cells"
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properties from.
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@param [out] AddressCells If success, number of address-cells.
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If the property is not available,
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default value is 2.
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@param [out] SizeCells If success, number of size-cells.
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If the property is not available,
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default value is 1.
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@retval EFI_INVALID_PARAMETER Invalid parameter.
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**/
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EFI_STATUS
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EFIAPI
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FdtGetIntcAddressCells (
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IN CONST VOID *Fdt,
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IN INT32 Node,
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OUT INT32 *AddressCells, OPTIONAL
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OUT INT32 *SizeCells OPTIONAL
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)
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{
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return FdtGetAddressInfo (Fdt, Node, AddressCells, SizeCells);
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}
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