/*++\r
\r
-Copyright (c) 2006, Intel Corporation \r
-All rights reserved. This program and the accompanying materials \r
-are licensed and made available under the terms and conditions of the BSD License \r
-which accompanies this distribution. The full text of the license may be found at \r
-http://opensource.org/licenses/bsd-license.php \r
- \r
-THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
-WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
+Copyright (c) 2006, Intel Corporation\r
+All rights reserved. This program and the accompanying materials\r
+are licensed and made available under the terms and conditions of the BSD License\r
+which accompanies this distribution. The full text of the license may be found at\r
+http://opensource.org/licenses/bsd-license.php\r
+\r
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
Module Name:\r
\r
\r
--*/\r
\r
-#include <DxeIpl.h>\r
+#include "DxeIpl.h"\r
\r
-EFI_STATUS\r
-CreateArchSpecificHobs (\r
- OUT EFI_PHYSICAL_ADDRESS *BspStore\r
+VOID\r
+HandOffToDxeCore (\r
+ IN EFI_PHYSICAL_ADDRESS DxeCoreEntryPoint,\r
+ IN EFI_PEI_HOB_POINTERS HobList\r
)\r
-/*++\r
-\r
-Routine Description:\r
-\r
- Creates architecture-specific HOBs.\r
-\r
- Note: New parameters should NOT be added for any HOBs that are added to this\r
- function. BspStore is a special case because it is required for the\r
- call to SwitchStacks() in DxeLoad().\r
-\r
-Arguments:\r
-\r
- BspStore - The address of the BSP Store for those architectures that need\r
- it. Otherwise 0.\r
-\r
-Returns:\r
-\r
- EFI_SUCCESS - The HOBs were created successfully.\r
-\r
---*/\r
{\r
- *BspStore = 0;\r
- return EFI_SUCCESS;\r
+ EFI_STATUS Status;\r
+ EFI_PHYSICAL_ADDRESS BaseOfStack;\r
+ EFI_PHYSICAL_ADDRESS TopOfStack;\r
+ EFI_PHYSICAL_ADDRESS PageTables;\r
+\r
+ Status = PeiServicesAllocatePages (EfiBootServicesData, EFI_SIZE_TO_PAGES (STACK_SIZE), &BaseOfStack);\r
+ ASSERT_EFI_ERROR (Status);\r
+ \r
+ if (FeaturePcdGet(PcdDxeIplSwitchToLongMode)) {\r
+ //\r
+ // Compute the top of the stack we were allocated, which is used to load X64 dxe core. \r
+ // Pre-allocate a 32 bytes which confroms to x64 calling convention.\r
+ //\r
+ // The first four parameters to a function are passed in rcx, rdx, r8 and r9. \r
+ // Any further parameters are pushed on the stack. Furthermore, space (4 * 8bytes) for the \r
+ // register parameters is reserved on the stack, in case the called function \r
+ // wants to spill them; this is important if the function is variadic. \r
+ //\r
+ TopOfStack = BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - 32;\r
+\r
+ //\r
+ // X64 Calling Conventions requires that the stack must be aligned to 16 bytes\r
+ //\r
+ TopOfStack = (EFI_PHYSICAL_ADDRESS) (UINTN) ALIGN_POINTER (TopOfStack, 16);\r
+ //\r
+ // Load the GDT of Go64. Since the GDT of 32-bit Tiano locates in the BS_DATA\r
+ // memory, it may be corrupted when copying FV to high-end memory \r
+ //\r
+ LoadGo64Gdt();\r
+ //\r
+ // Limit to 36 bits of addressing for debug. Should get it from CPU\r
+ //\r
+ PageTables = CreateIdentityMappingPageTables (36);\r
+ //\r
+ // Go to Long Mode. Interrupts will not get turned on until the CPU AP is loaded.\r
+ // Call x64 drivers passing in single argument, a pointer to the HOBs.\r
+ //\r
+ ActivateLongMode (\r
+ PageTables, \r
+ (EFI_PHYSICAL_ADDRESS)(UINTN)(HobList.Raw), \r
+ TopOfStack,\r
+ 0x00000000,\r
+ DxeCoreEntryPoint\r
+ );\r
+ } else {\r
+ //\r
+ // Compute the top of the stack we were allocated. Pre-allocate a UINTN\r
+ // for safety.\r
+ //\r
+ TopOfStack = BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT;\r
+ TopOfStack = (EFI_PHYSICAL_ADDRESS) (UINTN) ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);\r
+\r
+ SwitchStack (\r
+ (SWITCH_STACK_ENTRY_POINT)(UINTN)DxeCoreEntryPoint,\r
+ HobList.Raw,\r
+ NULL,\r
+ (VOID *) (UINTN) TopOfStack\r
+ );\r
+ } \r
}\r
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