diff options
Diffstat (limited to 'ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/Virt.c')
| -rw-r--r-- | ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/Virt.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/Virt.c b/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/Virt.c new file mode 100644 index 0000000000..7961b0524e --- /dev/null +++ b/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPlatformLib/Virt.c @@ -0,0 +1,197 @@ +/** @file
+*
+* Copyright (c) 2011-2013, ARM Limited. All rights reserved.
+* Copyright (c) 2014, Linaro Limited. All rights reserved.
+* Copyright (c) 2014, Red Hat, Inc.
+*
+*
+* 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/IoLib.h>
+#include <Library/ArmPlatformLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PcdLib.h>
+#include <ArmPlatform.h>
+#include <libfdt.h>
+#include <Pi/PiBootMode.h>
+#include <Uefi/UefiBaseType.h>
+#include <Uefi/UefiMultiPhase.h>
+#include <Pi/PiHob.h>
+#include <Library/HobLib.h>
+#include <Guid/EarlyPL011BaseAddress.h>
+
+/**
+ Return the current Boot Mode
+
+ This function returns the boot reason on the platform
+
+ @return Return the current Boot Mode of the platform
+
+**/
+EFI_BOOT_MODE
+ArmPlatformGetBootMode (
+ VOID
+ )
+{
+ return BOOT_WITH_FULL_CONFIGURATION;
+}
+
+/**
+ This function is called by PrePeiCore, in the SEC phase.
+**/
+RETURN_STATUS
+ArmPlatformInitialize (
+ IN UINTN MpId
+ )
+{
+ //
+ // We are relying on ArmPlatformInitializeSystemMemory () being called from
+ // InitializeMemory (), which only occurs if the following feature is disabled
+ //
+ ASSERT (!FeaturePcdGet (PcdSystemMemoryInitializeInSec));
+ return RETURN_SUCCESS;
+}
+
+/**
+ Initialize the system (or sometimes called permanent) memory
+
+ This memory is generally represented by the DRAM.
+
+ This function is called from InitializeMemory() in MemoryInitPeim, in the PEI
+ phase.
+**/
+VOID
+ArmPlatformInitializeSystemMemory (
+ VOID
+ )
+{
+ VOID *DeviceTreeBase;
+ INT32 Node, Prev;
+ UINT64 NewBase;
+ UINT64 NewSize;
+ BOOLEAN HaveMemory, HaveUART;
+ UINT64 *HobData;
+ CONST CHAR8 *Type;
+ CONST CHAR8 *Compatible;
+ CONST CHAR8 *CompItem;
+ INT32 Len;
+ CONST UINT64 *RegProp;
+ UINT64 UartBase;
+
+ NewBase = 0;
+ NewSize = 0;
+
+ HaveMemory = FALSE;
+ HaveUART = FALSE;
+
+ HobData = BuildGuidHob (&gEarlyPL011BaseAddressGuid, sizeof *HobData);
+ ASSERT (HobData != NULL);
+ *HobData = 0;
+
+ DeviceTreeBase = (VOID *)(UINTN)FixedPcdGet64 (PcdDeviceTreeInitialBaseAddress);
+ ASSERT (DeviceTreeBase != NULL);
+
+ //
+ // Make sure we have a valid device tree blob
+ //
+ ASSERT (fdt_check_header (DeviceTreeBase) == 0);
+
+ //
+ // Look for a memory node
+ //
+ for (Prev = 0; !(HaveMemory && HaveUART); Prev = Node) {
+ Node = fdt_next_node (DeviceTreeBase, Prev, NULL);
+ if (Node < 0) {
+ break;
+ }
+
+ //
+ // Check for memory node
+ //
+ Type = fdt_getprop (DeviceTreeBase, Node, "device_type", &Len);
+ if (Type && AsciiStrnCmp (Type, "memory", Len) == 0) {
+ //
+ // Get the 'reg' property of this node. For now, we will assume
+ // two 8 byte quantities for base and size, respectively.
+ //
+ RegProp = fdt_getprop (DeviceTreeBase, Node, "reg", &Len);
+ if (RegProp != 0 && Len == (2 * sizeof (UINT64))) {
+
+ NewBase = fdt64_to_cpu (ReadUnaligned64 (RegProp));
+ NewSize = fdt64_to_cpu (ReadUnaligned64 (RegProp + 1));
+
+ //
+ // Make sure the start of DRAM matches our expectation
+ //
+ ASSERT (FixedPcdGet64 (PcdSystemMemoryBase) == NewBase);
+ PcdSet64 (PcdSystemMemorySize, NewSize);
+
+ DEBUG ((EFI_D_INFO, "%a: System RAM @ 0x%lx - 0x%lx\n",
+ __FUNCTION__, NewBase, NewBase + NewSize - 1));
+ } else {
+ DEBUG ((EFI_D_ERROR, "%a: Failed to parse FDT memory node\n",
+ __FUNCTION__));
+ }
+ HaveMemory = TRUE;
+ continue;
+ }
+
+ //
+ // Check for UART node
+ //
+ Compatible = fdt_getprop (DeviceTreeBase, Node, "compatible", &Len);
+
+ //
+ // Iterate over the NULL-separated items in the compatible string
+ //
+ for (CompItem = Compatible; CompItem != NULL && CompItem < Compatible + Len;
+ CompItem += 1 + AsciiStrLen (CompItem)) {
+
+ if (AsciiStrCmp (CompItem, "arm,pl011") == 0) {
+ RegProp = fdt_getprop (DeviceTreeBase, Node, "reg", &Len);
+ ASSERT (Len == 16);
+
+ UartBase = fdt64_to_cpu (ReadUnaligned64 (RegProp));
+
+ DEBUG ((EFI_D_INFO, "%a: PL011 UART @ 0x%lx\n", __FUNCTION__, UartBase));
+
+ *HobData = UartBase;
+
+ HaveUART = TRUE;
+ continue;
+ }
+ }
+ }
+
+ //
+ // We need to make sure that the machine we are running on has at least
+ // 128 MB of memory configured, and is currently executing this binary from
+ // NOR flash. This prevents a device tree image in DRAM from getting
+ // clobbered when our caller installs permanent PEI RAM, before we have a
+ // chance of marking its location as reserved or copy it to a freshly
+ // allocated block in the permanent PEI RAM in the platform PEIM.
+ //
+ ASSERT (NewSize >= SIZE_128MB);
+ ASSERT (
+ (((UINT64)PcdGet32 (PcdFdBaseAddress) +
+ (UINT64)PcdGet32 (PcdFdSize)) <= NewBase) ||
+ ((UINT64)PcdGet32 (PcdFdBaseAddress) >= (NewBase + NewSize)));
+}
+
+VOID
+ArmPlatformGetPlatformPpiList (
+ OUT UINTN *PpiListSize,
+ OUT EFI_PEI_PPI_DESCRIPTOR **PpiList
+ )
+{
+ *PpiListSize = 0;
+ *PpiList = NULL;
+}
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