tyler.durden
/
audk
mirror of https://github.com/acidanthera/audk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

ArmPlatformPkg/ArmVirtualizationPkg: Add VirtFdtDxe driver 

This driver enumerates the device nodes in the device tree located at the
base address passed in gArmTokenSpaceGuid.PcdDeviceTreeBaseAddress, and
installs drivers for devices it cares about (GIC interrupt controller, RTC,
architected timer interrupt)

Contributed-under: TianoCore Contribution Agreement 1.0
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16137 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Ard Biesheuvel 2014-09-18 17:59:58 +00:00 committed by oliviermartin
parent 433b31ddee
commit ad10693231
2 changed files with 353 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

291
ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.c Normal file
View File

@ -0,0 +1,291 @@
/** @file
* Device tree enumeration DXE driver for ARM Virtual Machines
*
* Copyright (c) 2014, Linaro Ltd. All rights reserved.<BR>
*
* This program and the accompanying materials are
* licensed and made available under the terms and conditions of the BSD License
* which accompanies this distribution. The full text of the license may be found at
* http://opensource.org/licenses/bsd-license.php
*
* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
*
**/
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/VirtioMmioDeviceLib.h>
#include <Library/DevicePathLib.h>
#include <Library/PcdLib.h>
#include <Library/DxeServicesLib.h>
#include <libfdt.h>
#include <Guid/Fdt.h>
#pragma pack (1)
typedef struct {
VENDOR_DEVICE_PATH Vendor;
UINT64 PhysBase;
EFI_DEVICE_PATH_PROTOCOL End;
} VIRTIO_TRANSPORT_DEVICE_PATH;
#pragma pack ()
typedef enum {
PropertyTypeUnknown,
PropertyTypeGic,
PropertyTypeRtc,
PropertyTypeVirtio,
PropertyTypeUart,
PropertyTypeTimer,
PropertyTypePsci,
} PROPERTY_TYPE;
typedef struct {
PROPERTY_TYPE Type;
CHAR8 Compatible[20];
} PROPERTY;
STATIC CONST PROPERTY CompatibleProperties[] = {
{ PropertyTypeGic, "arm,cortex-a15-gic" },
{ PropertyTypeRtc, "arm,pl031" },
{ PropertyTypeVirtio, "virtio,mmio" },
{ PropertyTypeUart, "arm,pl011" },
{ PropertyTypeTimer, "arm,armv7-timer" },
{ PropertyTypeTimer, "arm,armv8-timer" },
{ PropertyTypePsci, "arm,psci-0.2" },
{ PropertyTypeUnknown, "" }
};
typedef struct {
UINT32 Type;
UINT32 Number;
UINT32 Flags;
} INTERRUPT_PROPERTY;
STATIC
PROPERTY_TYPE
GetTypeFromNode (
IN CONST CHAR8 *NodeType,
IN UINTN Size
)
{
CONST CHAR8 *Compatible;
CONST PROPERTY *CompatibleProperty;
//
// A 'compatible' node may contain a sequence of NULL terminated
// compatible strings so check each one
//
for (Compatible = NodeType; Compatible < NodeType + Size && *Compatible;
Compatible += 1 + AsciiStrLen (Compatible)) {
for (CompatibleProperty = CompatibleProperties; CompatibleProperty->Compatible[0]; CompatibleProperty++) {
if (AsciiStrCmp (CompatibleProperty->Compatible, Compatible) == 0) {
return CompatibleProperty->Type;
}
}
}
return PropertyTypeUnknown;
}
EFI_STATUS
EFIAPI
InitializeVirtFdtDxe (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
VOID *DeviceTreeBase;
INT32 Node, Prev;
INT32 RtcNode;
EFI_STATUS Status;
CONST CHAR8 *Type;
INT32 Len;
PROPERTY_TYPE PropType;
CONST VOID *RegProp;
VIRTIO_TRANSPORT_DEVICE_PATH *DevicePath;
EFI_HANDLE Handle;
UINT64 RegBase;
UINT64 DistBase, CpuBase;
CONST INTERRUPT_PROPERTY *InterruptProp;
INT32 SecIntrNum, IntrNum, VirtIntrNum, HypIntrNum;
CONST CHAR8 *PsciMethod;
DeviceTreeBase = (VOID *)(UINTN)PcdGet64 (PcdDeviceTreeBaseAddress);
ASSERT (DeviceTreeBase != NULL);
if (fdt_check_header (DeviceTreeBase) != 0) {
DEBUG ((EFI_D_ERROR, "%a: No DTB found @ 0x%p\n", __FUNCTION__, DeviceTreeBase));
return EFI_NOT_FOUND;
}
Status = gBS->InstallConfigurationTable (&gFdtTableGuid, DeviceTreeBase);
ASSERT_EFI_ERROR (Status);
DEBUG ((EFI_D_INFO, "%a: DTB @ 0x%p\n", __FUNCTION__, DeviceTreeBase));
RtcNode = -1;
//
// Now enumerate the nodes and install peripherals that we are interested in,
// i.e., GIC, RTC and virtio MMIO nodes
//
for (Prev = 0;; Prev = Node) {
Node = fdt_next_node (DeviceTreeBase, Prev, NULL);
if (Node < 0) {
break;
}
Type = fdt_getprop (DeviceTreeBase, Node, "compatible", &Len);
if (Type == NULL) {
continue;
}
PropType = GetTypeFromNode (Type, Len);
if (PropType == PropertyTypeUnknown) {
continue;
}
//
// Get the 'reg' property of this node. For now, we will assume
// 8 byte quantities for base and size, respectively.
// TODO use #cells root properties instead
//
RegProp = fdt_getprop (DeviceTreeBase, Node, "reg", &Len);
ASSERT ((RegProp != NULL) || (PropType == PropertyTypeTimer) ||
(PropType == PropertyTypePsci));
switch (PropType) {
case PropertyTypeVirtio:
ASSERT (Len == 16);
//
// Create a unique device path for this transport on the fly
//
RegBase = fdt64_to_cpu (((UINT64 *)RegProp)[0]);
DevicePath = (VIRTIO_TRANSPORT_DEVICE_PATH *)CreateDeviceNode (
HARDWARE_DEVICE_PATH,
HW_VENDOR_DP,
sizeof (VIRTIO_TRANSPORT_DEVICE_PATH));
if (DevicePath == NULL) {
DEBUG ((EFI_D_ERROR, "%a: Out of memory\n", __FUNCTION__));
break;
}
CopyMem (&DevicePath->Vendor.Guid, &gEfiCallerIdGuid, sizeof (EFI_GUID));
DevicePath->PhysBase = RegBase;
SetDevicePathNodeLength (&DevicePath->Vendor,
sizeof (*DevicePath) - sizeof (DevicePath->End));
SetDevicePathEndNode (&DevicePath->End);
Handle = NULL;
Status = gBS->InstallProtocolInterface (&Handle,
&gEfiDevicePathProtocolGuid, EFI_NATIVE_INTERFACE,
DevicePath);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "%a: Failed to install the EFI_DEVICE_PATH "
"protocol on a new handle (Status == %r)\n",
__FUNCTION__, Status));
FreePool (DevicePath);
break;
}
Status = VirtioMmioInstallDevice (RegBase, Handle);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "%a: Failed to install VirtIO transport @ 0x%Lx "
"on handle %p (Status == %r)\n", __FUNCTION__, RegBase,
Handle, Status));
Status = gBS->UninstallProtocolInterface (Handle,
&gEfiDevicePathProtocolGuid, DevicePath);
ASSERT_EFI_ERROR (Status);
FreePool (DevicePath);
}
break;
case PropertyTypeGic:
ASSERT (Len == 32);
DistBase = fdt64_to_cpu (((UINT64 *)RegProp)[0]);
CpuBase = fdt64_to_cpu (((UINT64 *)RegProp)[2]);
ASSERT (DistBase < MAX_UINT32);
ASSERT (CpuBase < MAX_UINT32);
PcdSet32 (PcdGicDistributorBase, (UINT32)DistBase);
PcdSet32 (PcdGicInterruptInterfaceBase, (UINT32)CpuBase);
DEBUG ((EFI_D_INFO, "Found GIC @ 0x%Lx/0x%Lx\n", DistBase, CpuBase));
break;
case PropertyTypeRtc:
ASSERT (Len == 16);
RegBase = fdt64_to_cpu (((UINT64 *)RegProp)[0]);
ASSERT (RegBase < MAX_UINT32);
PcdSet32 (PcdPL031RtcBase, (UINT32)RegBase);
DEBUG ((EFI_D_INFO, "Found PL031 RTC @ 0x%Lx\n", RegBase));
RtcNode = Node;
break;
case PropertyTypeTimer:
//
// - interrupts : Interrupt list for secure, non-secure, virtual and
// hypervisor timers, in that order.
//
InterruptProp = fdt_getprop (DeviceTreeBase, Node, "interrupts", &Len);
ASSERT (Len == 48);
SecIntrNum = fdt32_to_cpu (InterruptProp[0].Number)
+ (InterruptProp[0].Type ? 16 : 0);
IntrNum = fdt32_to_cpu (InterruptProp[1].Number)
+ (InterruptProp[1].Type ? 16 : 0);
VirtIntrNum = fdt32_to_cpu (InterruptProp[2].Number)
+ (InterruptProp[2].Type ? 16 : 0);
HypIntrNum = fdt32_to_cpu (InterruptProp[3].Number)
+ (InterruptProp[3].Type ? 16 : 0);
DEBUG ((EFI_D_INFO, "Found Timer interrupts %d, %d, %d, %d\n",
SecIntrNum, IntrNum, VirtIntrNum, HypIntrNum));
PcdSet32 (PcdArmArchTimerSecIntrNum, SecIntrNum);
PcdSet32 (PcdArmArchTimerIntrNum, IntrNum);
PcdSet32 (PcdArmArchTimerVirtIntrNum, VirtIntrNum);
PcdSet32 (PcdArmArchTimerHypIntrNum, HypIntrNum);
break;
case PropertyTypePsci:
PsciMethod = fdt_getprop (DeviceTreeBase, Node, "method", &Len);
if (PsciMethod && AsciiStrnCmp (PsciMethod, "hvc", 3) == 0) {
PcdSet32 (PcdArmPsciMethod, 1);
} else if (PsciMethod && AsciiStrnCmp (PsciMethod, "smc", 3) == 0) {
PcdSet32 (PcdArmPsciMethod, 2);
} else {
DEBUG ((EFI_D_ERROR, "%a: Unknown PSCI method \"%a\"\n", __FUNCTION__,
PsciMethod));
}
break;
default:
break;
}
}
//
// UEFI takes ownership of the RTC hardware, and exposes its functionality
// through the UEFI Runtime Services GetTime, SetTime, etc. This means we
// need to disable it in the device tree to prevent the OS from attaching its
// device driver as well.
//
if ((RtcNode != -1) &&
fdt_setprop_string (DeviceTreeBase, RtcNode, "status",
"disabled") != 0) {
DEBUG ((EFI_D_WARN, "Failed to set PL031 status to 'disabled'\n"));
}
return EFI_SUCCESS;
}

62
ArmPlatformPkg/ArmVirtualizationPkg/VirtFdtDxe/VirtFdtDxe.inf Normal file
View File

@ -0,0 +1,62 @@
## @file
# Device tree enumeration DXE driver for ARM Virtual Machines
#
# Copyright (c) 2014, Linaro Ltd. All rights reserved.<BR>
#
# This program and the accompanying materials are
# licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
##
[Defines]
INF_VERSION = 0x00010005
BASE_NAME = VirtFdtDxe
FILE_GUID = 837DCA9E-E874-4D82-B29A-23FE0E23D1E2
MODULE_TYPE = DXE_DRIVER
VERSION_STRING = 1.0
ENTRY_POINT = InitializeVirtFdtDxe
[Sources]
VirtFdtDxe.c
[Packages]
MdePkg/MdePkg.dec
ArmPkg/ArmPkg.dec
ArmPlatformPkg/ArmPlatformPkg.dec
ArmPlatformPkg/ArmVirtualizationPkg/ArmVirtualizationPkg.dec
EmbeddedPkg/EmbeddedPkg.dec
OvmfPkg/OvmfPkg.dec
[LibraryClasses]
BaseLib
PcdLib
UefiDriverEntryPoint
DxeServicesLib
FdtLib
VirtioMmioDeviceLib
[Guids]
gFdtTableGuid
[Pcd]
gArmVirtualizationTokenSpaceGuid.PcdDeviceTreeBaseAddress
gArmTokenSpaceGuid.PcdGicDistributorBase
gArmTokenSpaceGuid.PcdGicInterruptInterfaceBase
gArmTokenSpaceGuid.PcdArmArchTimerSecIntrNum
gArmTokenSpaceGuid.PcdArmArchTimerIntrNum
gArmTokenSpaceGuid.PcdArmArchTimerVirtIntrNum
gArmTokenSpaceGuid.PcdArmArchTimerHypIntrNum
gArmPlatformTokenSpaceGuid.PcdPL031RtcBase
gArmTokenSpaceGuid.PcdArmPsciMethod
[Protocols]
gEfiDevicePathProtocolGuid
[Depex]
TRUE