diff options
Diffstat (limited to 'OvmfPkg/Library/PlatformInitLib/MemDetect.c')
| -rw-r--r-- | OvmfPkg/Library/PlatformInitLib/MemDetect.c | 70 |
1 files changed, 48 insertions, 22 deletions
diff --git a/OvmfPkg/Library/PlatformInitLib/MemDetect.c b/OvmfPkg/Library/PlatformInitLib/MemDetect.c index fdfe134247..57feeb6dab 100644 --- a/OvmfPkg/Library/PlatformInitLib/MemDetect.c +++ b/OvmfPkg/Library/PlatformInitLib/MemDetect.c @@ -51,18 +51,16 @@ PlatformQemuUc32BaseInitialization ( IN OUT EFI_HOB_PLATFORM_INFO *PlatformInfoHob
)
{
- UINT32 LowerMemorySize;
-
if (PlatformInfoHob->HostBridgeDevId == 0xffff /* microvm */) {
return;
}
if (PlatformInfoHob->HostBridgeDevId == INTEL_Q35_MCH_DEVICE_ID) {
- LowerMemorySize = PlatformGetSystemMemorySizeBelow4gb (PlatformInfoHob);
+ PlatformGetSystemMemorySizeBelow4gb (PlatformInfoHob);
ASSERT (PcdGet64 (PcdPciExpressBaseAddress) <= MAX_UINT32);
- ASSERT (PcdGet64 (PcdPciExpressBaseAddress) >= LowerMemorySize);
+ ASSERT (PcdGet64 (PcdPciExpressBaseAddress) >= PlatformInfoHob->LowMemory);
- if (LowerMemorySize <= BASE_2GB) {
+ if (PlatformInfoHob->LowMemory <= BASE_2GB) {
// Newer qemu with gigabyte aligned memory,
// 32-bit pci mmio window is 2G -> 4G then.
PlatformInfoHob->Uc32Base = BASE_2GB;
@@ -92,8 +90,8 @@ PlatformQemuUc32BaseInitialization ( // variable MTRR suffices by truncating the size to a whole power of two,
// while keeping the end affixed to 4GB. This will round the base up.
//
- LowerMemorySize = PlatformGetSystemMemorySizeBelow4gb (PlatformInfoHob);
- PlatformInfoHob->Uc32Size = GetPowerOfTwo32 ((UINT32)(SIZE_4GB - LowerMemorySize));
+ PlatformGetSystemMemorySizeBelow4gb (PlatformInfoHob);
+ PlatformInfoHob->Uc32Size = GetPowerOfTwo32 ((UINT32)(SIZE_4GB - PlatformInfoHob->LowMemory));
PlatformInfoHob->Uc32Base = (UINT32)(SIZE_4GB - PlatformInfoHob->Uc32Size);
//
// Assuming that LowerMemorySize is at least 1 byte, Uc32Size is at most 2GB.
@@ -101,13 +99,13 @@ PlatformQemuUc32BaseInitialization ( //
ASSERT (PlatformInfoHob->Uc32Base >= BASE_2GB);
- if (PlatformInfoHob->Uc32Base != LowerMemorySize) {
+ if (PlatformInfoHob->Uc32Base != PlatformInfoHob->LowMemory) {
DEBUG ((
DEBUG_VERBOSE,
"%a: rounded UC32 base from 0x%x up to 0x%x, for "
"an UC32 size of 0x%x\n",
__FUNCTION__,
- LowerMemorySize,
+ PlatformInfoHob->LowMemory,
PlatformInfoHob->Uc32Base,
PlatformInfoHob->Uc32Size
));
@@ -281,6 +279,34 @@ PlatformGetFirstNonAddressCB ( }
/**
+ Store the low (below 4G) memory size in
+ PlatformInfoHob->LowMemory
+**/
+STATIC
+VOID
+PlatformGetLowMemoryCB (
+ IN EFI_E820_ENTRY64 *E820Entry,
+ IN OUT EFI_HOB_PLATFORM_INFO *PlatformInfoHob
+ )
+{
+ UINT64 Candidate;
+
+ if (E820Entry->Type != EfiAcpiAddressRangeMemory) {
+ return;
+ }
+
+ Candidate = E820Entry->BaseAddr + E820Entry->Length;
+ if (Candidate >= BASE_4GB) {
+ return;
+ }
+
+ if (PlatformInfoHob->LowMemory < Candidate) {
+ DEBUG ((DEBUG_INFO, "%a: LowMemory=0x%Lx\n", __FUNCTION__, Candidate));
+ PlatformInfoHob->LowMemory = (UINT32)Candidate;
+ }
+}
+
+/**
Iterate over the entries in QEMU's fw_cfg E820 RAM map, call the
passed callback for each entry.
@@ -396,14 +422,13 @@ GetHighestSystemMemoryAddressFromPvhMemmap ( return HighestAddress;
}
-UINT32
+VOID
EFIAPI
PlatformGetSystemMemorySizeBelow4gb (
IN EFI_HOB_PLATFORM_INFO *PlatformInfoHob
)
{
EFI_STATUS Status;
- UINT64 LowerMemorySize = 0;
UINT8 Cmos0x34;
UINT8 Cmos0x35;
@@ -411,12 +436,13 @@ PlatformGetSystemMemorySizeBelow4gb ( (CcProbe () != CcGuestTypeIntelTdx))
{
// Get the information from PVH memmap
- return (UINT32)GetHighestSystemMemoryAddressFromPvhMemmap (TRUE);
+ PlatformInfoHob->LowMemory = (UINT32)GetHighestSystemMemoryAddressFromPvhMemmap (TRUE);
+ return;
}
- Status = PlatformScanOrAdd64BitE820Ram (FALSE, &LowerMemorySize, NULL);
- if ((Status == EFI_SUCCESS) && (LowerMemorySize > 0)) {
- return (UINT32)LowerMemorySize;
+ Status = PlatformScanE820 (PlatformGetLowMemoryCB, PlatformInfoHob);
+ if (!EFI_ERROR (Status) && (PlatformInfoHob->LowMemory > 0)) {
+ return;
}
//
@@ -431,7 +457,7 @@ PlatformGetSystemMemorySizeBelow4gb ( Cmos0x34 = (UINT8)PlatformCmosRead8 (0x34);
Cmos0x35 = (UINT8)PlatformCmosRead8 (0x35);
- return (UINT32)(((UINTN)((Cmos0x35 << 8) + Cmos0x34) << 16) + SIZE_16MB);
+ PlatformInfoHob->LowMemory = (UINT32)(((UINTN)((Cmos0x35 << 8) + Cmos0x34) << 16) + SIZE_16MB);
}
STATIC
@@ -967,7 +993,6 @@ PlatformQemuInitializeRam ( IN EFI_HOB_PLATFORM_INFO *PlatformInfoHob
)
{
- UINT64 LowerMemorySize;
UINT64 UpperMemorySize;
MTRR_SETTINGS MtrrSettings;
EFI_STATUS Status;
@@ -977,7 +1002,7 @@ PlatformQemuInitializeRam ( //
// Determine total memory size available
//
- LowerMemorySize = PlatformGetSystemMemorySizeBelow4gb (PlatformInfoHob);
+ PlatformGetSystemMemorySizeBelow4gb (PlatformInfoHob);
if (PlatformInfoHob->BootMode == BOOT_ON_S3_RESUME) {
//
@@ -1011,14 +1036,14 @@ PlatformQemuInitializeRam ( UINT32 TsegSize;
TsegSize = PlatformInfoHob->Q35TsegMbytes * SIZE_1MB;
- PlatformAddMemoryRangeHob (BASE_1MB, LowerMemorySize - TsegSize);
+ PlatformAddMemoryRangeHob (BASE_1MB, PlatformInfoHob->LowMemory - TsegSize);
PlatformAddReservedMemoryBaseSizeHob (
- LowerMemorySize - TsegSize,
+ PlatformInfoHob->LowMemory - TsegSize,
TsegSize,
TRUE
);
} else {
- PlatformAddMemoryRangeHob (BASE_1MB, LowerMemorySize);
+ PlatformAddMemoryRangeHob (BASE_1MB, PlatformInfoHob->LowMemory);
}
//
@@ -1196,9 +1221,10 @@ PlatformQemuInitializeRamForS3 ( // Make sure the TSEG area that we reported as a reserved memory resource
// cannot be used for reserved memory allocations.
//
+ PlatformGetSystemMemorySizeBelow4gb (PlatformInfoHob);
TsegSize = PlatformInfoHob->Q35TsegMbytes * SIZE_1MB;
BuildMemoryAllocationHob (
- PlatformGetSystemMemorySizeBelow4gb (PlatformInfoHob) - TsegSize,
+ PlatformInfoHob->LowMemory - TsegSize,
TsegSize,
EfiReservedMemoryType
);
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