diff options
Diffstat (limited to 'UefiCpuPkg/Library/MpInitLib/DxeMpLib.c')
| -rw-r--r-- | UefiCpuPkg/Library/MpInitLib/DxeMpLib.c | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/UefiCpuPkg/Library/MpInitLib/DxeMpLib.c b/UefiCpuPkg/Library/MpInitLib/DxeMpLib.c index b2307cbb61..cef5b49dde 100644 --- a/UefiCpuPkg/Library/MpInitLib/DxeMpLib.c +++ b/UefiCpuPkg/Library/MpInitLib/DxeMpLib.c @@ -76,7 +76,7 @@ SaveCpuMpData ( }
/**
- Get available system memory below 1MB by specified size.
+ Get available system memory below 0x88000 by specified size.
@param[in] WakeupBufferSize Wakeup buffer size required
@@ -91,7 +91,15 @@ GetWakeupBuffer ( EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS StartAddress;
- StartAddress = BASE_1MB;
+ //
+ // Try to allocate buffer below 1M for waking vector.
+ // LegacyBios driver only reports warning when page allocation in range
+ // [0x60000, 0x88000) fails.
+ // This library is consumed by CpuDxe driver to produce CPU Arch protocol.
+ // LagacyBios driver depends on CPU Arch protocol which guarantees below
+ // allocation runs earlier than LegacyBios driver.
+ //
+ StartAddress = 0x88000;
Status = gBS->AllocatePages (
AllocateMaxAddress,
EfiBootServicesData,
@@ -99,17 +107,13 @@ GetWakeupBuffer ( &StartAddress
);
ASSERT_EFI_ERROR (Status);
- if (!EFI_ERROR (Status)) {
- Status = gBS->FreePages(
- StartAddress,
- EFI_SIZE_TO_PAGES (WakeupBufferSize)
- );
- ASSERT_EFI_ERROR (Status);
- DEBUG ((DEBUG_INFO, "WakeupBufferStart = %x, WakeupBufferSize = %x\n",
- (UINTN) StartAddress, WakeupBufferSize));
- } else {
+ if (EFI_ERROR (Status)) {
StartAddress = (EFI_PHYSICAL_ADDRESS) -1;
}
+
+ DEBUG ((DEBUG_INFO, "WakeupBufferStart = %x, WakeupBufferSize = %x\n",
+ (UINTN) StartAddress, WakeupBufferSize));
+
return (UINTN) StartAddress;
}
|