diff options
| -rw-r--r-- | OvmfPkg/Library/PlatformInitLib/MemDetect.c | 186 |
1 files changed, 48 insertions, 138 deletions
diff --git a/OvmfPkg/Library/PlatformInitLib/MemDetect.c b/OvmfPkg/Library/PlatformInitLib/MemDetect.c index 57feeb6..c24105c 100644 --- a/OvmfPkg/Library/PlatformInitLib/MemDetect.c +++ b/OvmfPkg/Library/PlatformInitLib/MemDetect.c @@ -112,143 +112,6 @@ PlatformQemuUc32BaseInitialization ( }
}
-/**
- Iterate over the RAM entries in QEMU's fw_cfg E820 RAM map that start outside
- of the 32-bit address range.
-
- Find the highest exclusive >=4GB RAM address, or produce memory resource
- descriptor HOBs for RAM entries that start at or above 4GB.
-
- @param[out] MaxAddress If MaxAddress is NULL, then PlatformScanOrAdd64BitE820Ram()
- produces memory resource descriptor HOBs for RAM
- entries that start at or above 4GB.
-
- Otherwise, MaxAddress holds the highest exclusive
- >=4GB RAM address on output. If QEMU's fw_cfg E820
- RAM map contains no RAM entry that starts outside of
- the 32-bit address range, then MaxAddress is exactly
- 4GB on output.
-
- @retval EFI_SUCCESS The fw_cfg E820 RAM map was found and processed.
-
- @retval EFI_PROTOCOL_ERROR The RAM map was found, but its size wasn't a
- whole multiple of sizeof(EFI_E820_ENTRY64). No
- RAM entry was processed.
-
- @return Error codes from QemuFwCfgFindFile(). No RAM
- entry was processed.
-**/
-STATIC
-EFI_STATUS
-PlatformScanOrAdd64BitE820Ram (
- IN BOOLEAN AddHighHob,
- OUT UINT64 *LowMemory OPTIONAL,
- OUT UINT64 *MaxAddress OPTIONAL
- )
-{
- EFI_STATUS Status;
- FIRMWARE_CONFIG_ITEM FwCfgItem;
- UINTN FwCfgSize;
- EFI_E820_ENTRY64 E820Entry;
- UINTN Processed;
-
- Status = QemuFwCfgFindFile ("etc/e820", &FwCfgItem, &FwCfgSize);
- if (EFI_ERROR (Status)) {
- return Status;
- }
-
- if (FwCfgSize % sizeof E820Entry != 0) {
- return EFI_PROTOCOL_ERROR;
- }
-
- if (LowMemory != NULL) {
- *LowMemory = 0;
- }
-
- if (MaxAddress != NULL) {
- *MaxAddress = BASE_4GB;
- }
-
- QemuFwCfgSelectItem (FwCfgItem);
- for (Processed = 0; Processed < FwCfgSize; Processed += sizeof E820Entry) {
- QemuFwCfgReadBytes (sizeof E820Entry, &E820Entry);
- DEBUG ((
- DEBUG_VERBOSE,
- "%a: Base=0x%Lx Length=0x%Lx Type=%u\n",
- __FUNCTION__,
- E820Entry.BaseAddr,
- E820Entry.Length,
- E820Entry.Type
- ));
- if (E820Entry.Type == EfiAcpiAddressRangeMemory) {
- if (AddHighHob && (E820Entry.BaseAddr >= BASE_4GB)) {
- UINT64 Base;
- UINT64 End;
-
- //
- // Round up the start address, and round down the end address.
- //
- Base = ALIGN_VALUE (E820Entry.BaseAddr, (UINT64)EFI_PAGE_SIZE);
- End = (E820Entry.BaseAddr + E820Entry.Length) &
- ~(UINT64)EFI_PAGE_MASK;
- if (Base < End) {
- PlatformAddMemoryRangeHob (Base, End);
- DEBUG ((
- DEBUG_VERBOSE,
- "%a: PlatformAddMemoryRangeHob [0x%Lx, 0x%Lx)\n",
- __FUNCTION__,
- Base,
- End
- ));
- }
- }
-
- if (MaxAddress || LowMemory) {
- UINT64 Candidate;
-
- Candidate = E820Entry.BaseAddr + E820Entry.Length;
- if (MaxAddress && (Candidate > *MaxAddress)) {
- *MaxAddress = Candidate;
- DEBUG ((
- DEBUG_VERBOSE,
- "%a: MaxAddress=0x%Lx\n",
- __FUNCTION__,
- *MaxAddress
- ));
- }
-
- if (LowMemory && (Candidate > *LowMemory) && (Candidate < BASE_4GB)) {
- *LowMemory = Candidate;
- DEBUG ((
- DEBUG_VERBOSE,
- "%a: LowMemory=0x%Lx\n",
- __FUNCTION__,
- *LowMemory
- ));
- }
- }
- } else if (E820Entry.Type == EfiAcpiAddressRangeReserved) {
- if (AddHighHob) {
- DEBUG ((
- DEBUG_INFO,
- "%a: Reserved: Base=0x%Lx Length=0x%Lx\n",
- __FUNCTION__,
- E820Entry.BaseAddr,
- E820Entry.Length
- ));
- BuildResourceDescriptorHob (
- EFI_RESOURCE_MEMORY_RESERVED,
- 0,
- E820Entry.BaseAddr,
- E820Entry.Length
- );
- }
- }
- }
-
- return EFI_SUCCESS;
-}
-
typedef VOID (*E820_SCAN_CALLBACK) (
EFI_E820_ENTRY64 *E820Entry,
EFI_HOB_PLATFORM_INFO *PlatformInfoHob
@@ -307,6 +170,53 @@ PlatformGetLowMemoryCB ( }
/**
+ Create HOBs for reservations and RAM (except low memory).
+**/
+STATIC
+VOID
+PlatformAddHobCB (
+ IN EFI_E820_ENTRY64 *E820Entry,
+ IN OUT EFI_HOB_PLATFORM_INFO *PlatformInfoHob
+ )
+{
+ UINT64 Base, End;
+
+ Base = E820Entry->BaseAddr;
+ End = E820Entry->BaseAddr + E820Entry->Length;
+
+ switch (E820Entry->Type) {
+ case EfiAcpiAddressRangeMemory:
+ if (Base >= BASE_4GB) {
+ //
+ // Round up the start address, and round down the end address.
+ //
+ Base = ALIGN_VALUE (Base, (UINT64)EFI_PAGE_SIZE);
+ End = End & ~(UINT64)EFI_PAGE_MASK;
+ if (Base < End) {
+ DEBUG ((DEBUG_INFO, "%a: HighMemory [0x%Lx, 0x%Lx)\n", __FUNCTION__, Base, End));
+ PlatformAddMemoryRangeHob (Base, End);
+ }
+ }
+
+ break;
+ case EfiAcpiAddressRangeReserved:
+ BuildResourceDescriptorHob (EFI_RESOURCE_MEMORY_RESERVED, 0, Base, End);
+ DEBUG ((DEBUG_INFO, "%a: Reserved [0x%Lx, 0x%Lx)\n", __FUNCTION__, Base, End));
+ break;
+ default:
+ DEBUG ((
+ DEBUG_WARN,
+ "%a: Type %u [0x%Lx, 0x%Lx) (NOT HANDLED)\n",
+ __FUNCTION__,
+ E820Entry->Type,
+ Base,
+ End
+ ));
+ break;
+ }
+}
+
+/**
Iterate over the entries in QEMU's fw_cfg E820 RAM map, call the
passed callback for each entry.
@@ -1051,7 +961,7 @@ PlatformQemuInitializeRam ( // entries. Otherwise, create a single memory HOB with the flat >=4GB
// memory size read from the CMOS.
//
- Status = PlatformScanOrAdd64BitE820Ram (TRUE, NULL, NULL);
+ Status = PlatformScanE820 (PlatformAddHobCB, PlatformInfoHob);
if (EFI_ERROR (Status)) {
UpperMemorySize = PlatformGetSystemMemorySizeAbove4gb ();
if (UpperMemorySize != 0) {
|