diff options
Diffstat (limited to 'OvmfPkg/XenAcpiPlatformDxe/AcpiPlatform.c')
| -rw-r--r-- | OvmfPkg/XenAcpiPlatformDxe/AcpiPlatform.c | 47 |
1 files changed, 44 insertions, 3 deletions
diff --git a/OvmfPkg/XenAcpiPlatformDxe/AcpiPlatform.c b/OvmfPkg/XenAcpiPlatformDxe/AcpiPlatform.c index e06bb25dfc..2dbc812953 100644 --- a/OvmfPkg/XenAcpiPlatformDxe/AcpiPlatform.c +++ b/OvmfPkg/XenAcpiPlatformDxe/AcpiPlatform.c @@ -7,10 +7,15 @@ **/
-#include <Library/XenPlatformLib.h> // XenDetected()
+#include <Library/AcpiPlatformLib.h> // InstallAcpiTablesFromMemory()
+#include <Library/DebugLib.h> // DEBUG()
+#include <Library/XenPlatformLib.h> // XenDetected()
#include "AcpiPlatform.h"
+#define XEN_ACPI_PHYSICAL_ADDRESS 0x000EA020
+#define XEN_BIOS_PHYSICAL_END 0x000FFFFF
+
/**
Effective entrypoint of Acpi Platform driver.
@@ -28,10 +33,46 @@ InstallAcpiTables ( IN EFI_ACPI_TABLE_PROTOCOL *AcpiTable
)
{
- EFI_STATUS Status;
+ EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *RsdpStructurePtr;
+ EFI_XEN_INFO *XenInfo;
+ EFI_STATUS Status;
if (XenDetected ()) {
- Status = InstallXenTables (AcpiTable);
+ //
+ // Detect the RSDP structure
+ //
+
+ //
+ // First look for PVH one
+ //
+ XenInfo = XenGetInfoHOB ();
+ ASSERT (XenInfo != NULL);
+ if (XenInfo->RsdpPvh != NULL) {
+ DEBUG ((
+ DEBUG_INFO,
+ "%a: Use ACPI RSDP table at 0x%p\n",
+ gEfiCallerBaseName,
+ XenInfo->RsdpPvh
+ ));
+ RsdpStructurePtr = XenInfo->RsdpPvh;
+ } else {
+ //
+ // Otherwise, look for the HVM one
+ //
+ Status = GetAcpiRsdpFromMemory (
+ XEN_ACPI_PHYSICAL_ADDRESS,
+ XEN_BIOS_PHYSICAL_END,
+ &RsdpStructurePtr
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ }
+
+ Status = InstallAcpiTablesFromRsdp (
+ AcpiTable,
+ RsdpStructurePtr
+ );
} else {
Status = EFI_UNSUPPORTED;
}
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