REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3998
Certain OSes will complain if the ECAM config space is not reserved in
the ACPI namespace.
This change adds a function to reserve PNP motherboard resources for a
given PCI node.
Co-authored-by: Joe Lopez <joelo...@microsoft.com>
Signed-off-by: Kun Qin <kuqi...@gmail.com>
---
Notes:
v2:
- Only create RES0 after config space checking [Pierre]
v3:
- Updated function names and descriptions [Pierre]
- Moved translation calculation to CONFIG case [Pierre]
v4:
- Used CM_ARM_PCI_CONFIG_SPACE_INFO for ECAM region calculation [Sami,
Pierre]
DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c | 135
++++++++++++++++++++
1 file changed, 135 insertions(+)
diff --git
a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
index ceffe2838c03..dd75fc27e60e 100644
--- a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
+++ b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
@@ -34,6 +34,9 @@
#include "SsdtPcieGenerator.h"
+#define PCI_MAX_DEVICE_COUNT_PER_BUS 32
+#define PCI_MAX_FUNCTION_COUNT_PER_DEVICE 8
+
/** ARM standard SSDT Pcie Table Generator.
Requirements:
@@ -616,6 +619,130 @@ GeneratePciCrs (
return Status;
}
+/** Generate a RES0 device node to reserve PNP motherboard resources
+ for a given PCI node.
+
+ @param [in] PciNode Parent PCI node handle of the generated
+ resource object.
+ @param [out] CrsNode CRS node of the AML tree to populate.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval EFI_INVALID_PARAMETER Invalid input parameter.
+ @retval EFI_OUT_OF_RESOURCES Could not allocate memory.
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+GenerateMotherboardDevice (
+ IN AML_OBJECT_NODE_HANDLE PciNode,
+ OUT AML_OBJECT_NODE_HANDLE *CrsNode
+ )
+{
+ EFI_STATUS Status;
+ UINT32 EisaId;
+ AML_OBJECT_NODE_HANDLE ResNode;
+
+ if (CrsNode == NULL) {
+ ASSERT (0);
+ return EFI_INVALID_PARAMETER;
+ }
+
+ // ASL: Device (RES0) {}
+ Status = AmlCodeGenDevice ("RES0", PciNode, &ResNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+
+ // ASL: Name (_HID, EISAID ("PNP0C02"))
+ Status = AmlGetEisaIdFromString ("PNP0C02", &EisaId); /* PNP Motherboard
Resources */
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+
+ Status = AmlCodeGenNameInteger ("_HID", EisaId, ResNode, NULL);
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+
+ // ASL: Name (_CRS, ResourceTemplate () {})
+ Status = AmlCodeGenNameResourceTemplate ("_CRS", ResNode, CrsNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+
+ return Status;
+}
+
+/** Reserves ECAM space for PCI config space
+
+ @param [in] Generator The SSDT Pci generator.
+ @param [in] CfgMgrProtocol Pointer to the Configuration Manager
+ Protocol interface.
+ @param [in] PciInfo Pci device information.
+ @param [in, out] PciNode RootNode of the AML tree to populate.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval EFI_INVALID_PARAMETER Invalid parameter.
+ @retval EFI_OUT_OF_RESOURCES Could not allocate memory.
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+ReserveEcamSpace (
+ IN ACPI_PCI_GENERATOR *Generator,
+ IN CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL *CONST CfgMgrProtocol,
+ IN CONST CM_ARM_PCI_CONFIG_SPACE_INFO *PciInfo,
+ IN OUT AML_OBJECT_NODE_HANDLE PciNode
+ )
+{
+ EFI_STATUS Status;
+ AML_OBJECT_NODE_HANDLE CrsNode;
+ UINT64 AddressMinimum;
+ UINT64 AddressMaximum;
+
+ Status = GenerateMotherboardDevice (PciNode, &CrsNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+
+ AddressMinimum = PciInfo->BaseAddress + (PciInfo->StartBusNumber *
+ PCI_MAX_DEVICE_COUNT_PER_BUS *
PCI_MAX_FUNCTION_COUNT_PER_DEVICE * SIZE_4KB);
+ AddressMaximum = PciInfo->BaseAddress + ((PciInfo->EndBusNumber + 1) *
+ PCI_MAX_DEVICE_COUNT_PER_BUS *
PCI_MAX_FUNCTION_COUNT_PER_DEVICE * SIZE_4KB) - 1;
+
+ Status = AmlCodeGenRdQWordMemory (
+ FALSE,
+ TRUE,
+ TRUE,
+ TRUE,
+ FALSE, // non-cacheable
+ TRUE,
+ 0,
+ AddressMinimum,
+ AddressMaximum,
+ 0, // no translation
+ AddressMaximum - AddressMinimum + 1,
+ 0,
+ NULL,
+ 0,
+ TRUE,
+ CrsNode,
+ NULL
+ );
+
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+
+ return Status;
+}
+
/** Generate a Pci device.
@param [in] Generator The SSDT Pci generator.
@@ -702,9 +829,17 @@ GeneratePciDevice (
return Status;
}
+ // Add the PNP Motherboard Resources Device to reserve ECAM space
+ Status = ReserveEcamSpace (Generator, CfgMgrProtocol, PciInfo, PciNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+
// Add the template _OSC method.
Status = AddOscMethod (PciInfo, PciNode);
ASSERT_EFI_ERROR (Status);
+
return Status;
}
--
2.37.1.windows.1
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