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Re: [Xen-devel] [PATCH] OvmfPkg: Add ACPI support for Virt Xen ARM
Hello Shannon,
On 31/05/16 05:59, Shannon Zhao wrote:
+EFI_STATUS
+EFIAPI
+GetXenArmAcpiRsdp (
+ OUT EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER **RsdpPtr
+ )
+{
+ VOID *Hob;
+ EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *RsdpStructurePtr;
+ VOID *DeviceTreeBase;
+ INT32 Node, Depth, Len;
+ CONST CHAR8 *Type;
+ CONST VOID *RegProp;
+
+ RsdpStructurePtr = NULL;
+ //
+ // Get the RSDP structure address from DeviceTree
+ //
+ Hob = GetFirstGuidHob(&gFdtHobGuid);
+ if (Hob == NULL || GET_GUID_HOB_DATA_SIZE (Hob) != sizeof (UINT64)) {
+ DEBUG ((EFI_D_ERROR, "%a: Failed to get Fdt Hob\n", __FUNCTION__));
+ return EFI_NOT_FOUND;
+ }
+ DeviceTreeBase = (VOID *)(UINTN)*(UINT64 *)GET_GUID_HOB_DATA (Hob);
+
+ if (fdt_check_header (DeviceTreeBase) != 0) {
+ DEBUG ((EFI_D_ERROR, "%a: No DTB found @ 0x%p\n", __FUNCTION__,
DeviceTreeBase));
+ return EFI_NOT_FOUND;
+ }
+
+ Node = fdt_path_offset(DeviceTreeBase, "/chosen/modules");
I am not sure if we want to mandate the modules to live in "/chosen".
Would it be possible to look by compatible instead?
Regards,
--
Julien Grall
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