IN OUT EFI_HOB_PLATFORM_INFO *PlatformInfoHob\r
)\r
{\r
- UINT32 LowerMemorySize;\r
-\r
if (PlatformInfoHob->HostBridgeDevId == 0xffff /* microvm */) {\r
return;\r
}\r
\r
if (PlatformInfoHob->HostBridgeDevId == INTEL_Q35_MCH_DEVICE_ID) {\r
- LowerMemorySize = PlatformGetSystemMemorySizeBelow4gb (PlatformInfoHob);\r
+ PlatformGetSystemMemorySizeBelow4gb (PlatformInfoHob);\r
ASSERT (PcdGet64 (PcdPciExpressBaseAddress) <= MAX_UINT32);\r
- ASSERT (PcdGet64 (PcdPciExpressBaseAddress) >= LowerMemorySize);\r
+ ASSERT (PcdGet64 (PcdPciExpressBaseAddress) >= PlatformInfoHob->LowMemory);\r
\r
- if (LowerMemorySize <= BASE_2GB) {\r
+ if (PlatformInfoHob->LowMemory <= BASE_2GB) {\r
// Newer qemu with gigabyte aligned memory,\r
// 32-bit pci mmio window is 2G -> 4G then.\r
PlatformInfoHob->Uc32Base = BASE_2GB;\r
// variable MTRR suffices by truncating the size to a whole power of two,\r
// while keeping the end affixed to 4GB. This will round the base up.\r
//\r
- LowerMemorySize = PlatformGetSystemMemorySizeBelow4gb (PlatformInfoHob);\r
- PlatformInfoHob->Uc32Size = GetPowerOfTwo32 ((UINT32)(SIZE_4GB - LowerMemorySize));\r
+ PlatformGetSystemMemorySizeBelow4gb (PlatformInfoHob);\r
+ PlatformInfoHob->Uc32Size = GetPowerOfTwo32 ((UINT32)(SIZE_4GB - PlatformInfoHob->LowMemory));\r
PlatformInfoHob->Uc32Base = (UINT32)(SIZE_4GB - PlatformInfoHob->Uc32Size);\r
//\r
// Assuming that LowerMemorySize is at least 1 byte, Uc32Size is at most 2GB.\r
//\r
ASSERT (PlatformInfoHob->Uc32Base >= BASE_2GB);\r
\r
- if (PlatformInfoHob->Uc32Base != LowerMemorySize) {\r
+ if (PlatformInfoHob->Uc32Base != PlatformInfoHob->LowMemory) {\r
DEBUG ((\r
DEBUG_VERBOSE,\r
"%a: rounded UC32 base from 0x%x up to 0x%x, for "\r
"an UC32 size of 0x%x\n",\r
__FUNCTION__,\r
- LowerMemorySize,\r
+ PlatformInfoHob->LowMemory,\r
PlatformInfoHob->Uc32Base,\r
PlatformInfoHob->Uc32Size\r
));\r
}\r
}\r
\r
+/**\r
+ Store the low (below 4G) memory size in\r
+ PlatformInfoHob->LowMemory\r
+**/\r
+STATIC\r
+VOID\r
+PlatformGetLowMemoryCB (\r
+ IN EFI_E820_ENTRY64 *E820Entry,\r
+ IN OUT EFI_HOB_PLATFORM_INFO *PlatformInfoHob\r
+ )\r
+{\r
+ UINT64 Candidate;\r
+\r
+ if (E820Entry->Type != EfiAcpiAddressRangeMemory) {\r
+ return;\r
+ }\r
+\r
+ Candidate = E820Entry->BaseAddr + E820Entry->Length;\r
+ if (Candidate >= BASE_4GB) {\r
+ return;\r
+ }\r
+\r
+ if (PlatformInfoHob->LowMemory < Candidate) {\r
+ DEBUG ((DEBUG_INFO, "%a: LowMemory=0x%Lx\n", __FUNCTION__, Candidate));\r
+ PlatformInfoHob->LowMemory = (UINT32)Candidate;\r
+ }\r
+}\r
+\r
/**\r
Iterate over the entries in QEMU's fw_cfg E820 RAM map, call the\r
passed callback for each entry.\r
return HighestAddress;\r
}\r
\r
-UINT32\r
+VOID\r
EFIAPI\r
PlatformGetSystemMemorySizeBelow4gb (\r
IN EFI_HOB_PLATFORM_INFO *PlatformInfoHob\r
)\r
{\r
EFI_STATUS Status;\r
- UINT64 LowerMemorySize = 0;\r
UINT8 Cmos0x34;\r
UINT8 Cmos0x35;\r
\r
(CcProbe () != CcGuestTypeIntelTdx))\r
{\r
// Get the information from PVH memmap\r
- return (UINT32)GetHighestSystemMemoryAddressFromPvhMemmap (TRUE);\r
+ PlatformInfoHob->LowMemory = (UINT32)GetHighestSystemMemoryAddressFromPvhMemmap (TRUE);\r
+ return;\r
}\r
\r
- Status = PlatformScanOrAdd64BitE820Ram (FALSE, &LowerMemorySize, NULL);\r
- if ((Status == EFI_SUCCESS) && (LowerMemorySize > 0)) {\r
- return (UINT32)LowerMemorySize;\r
+ Status = PlatformScanE820 (PlatformGetLowMemoryCB, PlatformInfoHob);\r
+ if (!EFI_ERROR (Status) && (PlatformInfoHob->LowMemory > 0)) {\r
+ return;\r
}\r
\r
//\r
Cmos0x34 = (UINT8)PlatformCmosRead8 (0x34);\r
Cmos0x35 = (UINT8)PlatformCmosRead8 (0x35);\r
\r
- return (UINT32)(((UINTN)((Cmos0x35 << 8) + Cmos0x34) << 16) + SIZE_16MB);\r
+ PlatformInfoHob->LowMemory = (UINT32)(((UINTN)((Cmos0x35 << 8) + Cmos0x34) << 16) + SIZE_16MB);\r
}\r
\r
STATIC\r
IN EFI_HOB_PLATFORM_INFO *PlatformInfoHob\r
)\r
{\r
- UINT64 LowerMemorySize;\r
UINT64 UpperMemorySize;\r
MTRR_SETTINGS MtrrSettings;\r
EFI_STATUS Status;\r
//\r
// Determine total memory size available\r
//\r
- LowerMemorySize = PlatformGetSystemMemorySizeBelow4gb (PlatformInfoHob);\r
+ PlatformGetSystemMemorySizeBelow4gb (PlatformInfoHob);\r
\r
if (PlatformInfoHob->BootMode == BOOT_ON_S3_RESUME) {\r
//\r
UINT32 TsegSize;\r
\r
TsegSize = PlatformInfoHob->Q35TsegMbytes * SIZE_1MB;\r
- PlatformAddMemoryRangeHob (BASE_1MB, LowerMemorySize - TsegSize);\r
+ PlatformAddMemoryRangeHob (BASE_1MB, PlatformInfoHob->LowMemory - TsegSize);\r
PlatformAddReservedMemoryBaseSizeHob (\r
- LowerMemorySize - TsegSize,\r
+ PlatformInfoHob->LowMemory - TsegSize,\r
TsegSize,\r
TRUE\r
);\r
} else {\r
- PlatformAddMemoryRangeHob (BASE_1MB, LowerMemorySize);\r
+ PlatformAddMemoryRangeHob (BASE_1MB, PlatformInfoHob->LowMemory);\r
}\r
\r
//\r
// Make sure the TSEG area that we reported as a reserved memory resource\r
// cannot be used for reserved memory allocations.\r
//\r
+ PlatformGetSystemMemorySizeBelow4gb (PlatformInfoHob);\r
TsegSize = PlatformInfoHob->Q35TsegMbytes * SIZE_1MB;\r
BuildMemoryAllocationHob (\r
- PlatformGetSystemMemorySizeBelow4gb (PlatformInfoHob) - TsegSize,\r
+ PlatformInfoHob->LowMemory - TsegSize,\r
TsegSize,\r
EfiReservedMemoryType\r
);\r