[mirror_edk2.git] / MdeModulePkg / Core / DxeIplPeim / Ia32 / DxeLoadFunc.c

/** @file\r
  Ia32-specifc functionality for DxeLoad.\r
\r
Copyright (c) 2006 - 2008, Intel Corporation. <BR>\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
**/\r
\r
#include "DxeIpl.h"\r
#include "VirtualMemory.h"\r
\r
//\r
// Global Descriptor Table (GDT)\r
//\r
GLOBAL_REMOVE_IF_UNREFERENCED IA32_GDT gGdtEntries [] = {\r
/* selector { Global Segment Descriptor                              } */  \r
/* 0x00 */  {{0,      0,  0,  0,    0,  0,  0,  0,    0,  0, 0,  0,  0}}, //null descriptor \r
/* 0x08 */  {{0xffff, 0,  0,  0x2,  1,  0,  1,  0xf,  0,  0, 1,  1,  0}}, //linear data segment descriptor\r
/* 0x10 */  {{0xffff, 0,  0,  0xf,  1,  0,  1,  0xf,  0,  0, 1,  1,  0}}, //linear code segment descriptor\r
/* 0x18 */  {{0xffff, 0,  0,  0x3,  1,  0,  1,  0xf,  0,  0, 1,  1,  0}}, //system data segment descriptor\r
/* 0x20 */  {{0xffff, 0,  0,  0xa,  1,  0,  1,  0xf,  0,  0, 1,  1,  0}}, //system code segment descriptor\r
/* 0x28 */  {{0,      0,  0,  0,    0,  0,  0,  0,    0,  0, 0,  0,  0}}, //spare segment descriptor\r
/* 0x30 */  {{0xffff, 0,  0,  0x2,  1,  0,  1,  0xf,  0,  0, 1,  1,  0}}, //system data segment descriptor\r
/* 0x38 */  {{0xffff, 0,  0,  0xa,  1,  0,  1,  0xf,  0,  1, 0,  1,  0}}, //system code segment descriptor\r
/* 0x40 */  {{0,      0,  0,  0,    0,  0,  0,  0,    0,  0, 0,  0,  0}}, //spare segment descriptor\r
};\r
\r
//\r
// IA32 Gdt register\r
//\r
GLOBAL_REMOVE_IF_UNREFERENCED CONST IA32_DESCRIPTOR gGdt = {\r
  sizeof (gGdtEntries) - 1,\r
  (UINTN) gGdtEntries\r
  };\r
\r
GLOBAL_REMOVE_IF_UNREFERENCED  IA32_DESCRIPTOR gLidtDescriptor = {\r
  sizeof (X64_IDT_GATE_DESCRIPTOR) * 32 - 1,\r
  0\r
};\r
\r
VOID\r
HandOffToDxeCore (\r
  IN EFI_PHYSICAL_ADDRESS   DxeCoreEntryPoint,\r
  IN EFI_PEI_HOB_POINTERS   HobList,\r
  IN EFI_PEI_PPI_DESCRIPTOR *EndOfPeiSignal\r
  )\r
{\r
  EFI_STATUS                Status;\r
  EFI_PHYSICAL_ADDRESS      BaseOfStack;\r
  EFI_PHYSICAL_ADDRESS      TopOfStack;\r
  UINTN                     PageTables;\r
  X64_IDT_GATE_DESCRIPTOR   *IdtTable;\r
  UINTN                     SizeOfTemplate;\r
  VOID                      *TemplateBase;\r
  EFI_PHYSICAL_ADDRESS      VectorAddress;\r
  UINT32                    Index;\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
    //\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
    AsmWriteGdtr (&gGdt);\r
    //\r
    // Create page table and save PageMapLevel4 to CR3\r
    //\r
    PageTables = CreateIdentityMappingPageTables ();\r
\r
    //\r
    // End of PEI phase singal\r
    //\r
    Status = PeiServicesInstallPpi (EndOfPeiSignal);\r
    ASSERT_EFI_ERROR (Status);\r
    \r
    AsmWriteCr3 (PageTables);\r
\r
    //\r
    // Update the contents of BSP stack HOB to reflect the real stack info passed to DxeCore.\r
    //    \r
    UpdateStackHob (BaseOfStack, STACK_SIZE);\r
\r
    if (FeaturePcdGet (PcdDxeIplEnableIdt)) {\r
      SizeOfTemplate = AsmGetVectorTemplatInfo (&TemplateBase);\r
  \r
      Status = PeiServicesAllocatePages (\r
                 EfiBootServicesData, \r
                 EFI_SIZE_TO_PAGES((SizeOfTemplate + sizeof (X64_IDT_GATE_DESCRIPTOR)) * 32), \r
                 &VectorAddress\r
                 );\r
  \r
      ASSERT_EFI_ERROR (Status);\r
  \r
      IdtTable      = (X64_IDT_GATE_DESCRIPTOR *) (UINTN) (VectorAddress + SizeOfTemplate * 32);\r
      for (Index = 0; Index < 32; Index++) {\r
        IdtTable[Index].Ia32IdtEntry.Bits.GateType    =  0x8e;\r
        IdtTable[Index].Ia32IdtEntry.Bits.Reserved_0  =  0;\r
        IdtTable[Index].Ia32IdtEntry.Bits.Selector    =  SYS_CODE64_SEL;\r
  \r
        IdtTable[Index].Ia32IdtEntry.Bits.OffsetLow   = (UINT16) VectorAddress;\r
        IdtTable[Index].Ia32IdtEntry.Bits.OffsetHigh  = (UINT16) (RShiftU64 (VectorAddress, 16));\r
        IdtTable[Index].Offset32To63                  = (UINT32) (RShiftU64 (VectorAddress, 32));\r
        IdtTable[Index].Reserved                      = 0;\r
  \r
        CopyMem ((VOID *) (UINTN) VectorAddress, TemplateBase, SizeOfTemplate);\r
        AsmVectorFixup ((VOID *) (UINTN) VectorAddress, (UINT8) Index);\r
  \r
        VectorAddress += SizeOfTemplate;\r
      }\r
  \r
      gLidtDescriptor.Base = (UINTN) IdtTable;\r
      AsmWriteIdtr (&gLidtDescriptor);\r
    }\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
    AsmEnablePaging64 (\r
      SYS_CODE64_SEL,\r
      DxeCoreEntryPoint,\r
      (EFI_PHYSICAL_ADDRESS)(UINTN)(HobList.Raw),\r
      0,\r
      TopOfStack\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
    //\r
    // End of PEI phase singal\r
    //\r
    Status = PeiServicesInstallPpi (EndOfPeiSignal);\r
    ASSERT_EFI_ERROR (Status);\r
\r
    //\r
    // Update the contents of BSP stack HOB to reflect the real stack info passed to DxeCore.\r
    //    \r
    UpdateStackHob (BaseOfStack, STACK_SIZE);\r
\r
    SwitchStack (\r
      (SWITCH_STACK_ENTRY_POINT)(UINTN)DxeCoreEntryPoint,\r
      HobList.Raw,\r
      NULL,\r
      (VOID *) (UINTN) TopOfStack\r
      );\r
  } \r
}\r
\r
Commit	Line	Data
96226baa	1	/** @file\r
96226baa	2	Ia32-specifc functionality for DxeLoad.\r
95276127	3	\r
96226baa	4	Copyright (c) 2006 - 2008, Intel Corporation. <BR>\r
95276127	5	All rights reserved. This program and the accompanying materials\r
	6	are licensed and made available under the terms and conditions of the BSD License\r
	7	which accompanies this distribution. The full text of the license may be found at\r
	8	http://opensource.org/licenses/bsd-license.php\r
	9	\r
	10	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	11	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	12	\r
96226baa	13	**/\r
95276127	14	\r
95276127	15	#include "DxeIpl.h"\r
	16	#include "VirtualMemory.h"\r
	17	\r
	18	//\r
	19	// Global Descriptor Table (GDT)\r
	20	//\r
	21	GLOBAL_REMOVE_IF_UNREFERENCED IA32_GDT gGdtEntries [] = {\r
	22	/* selector { Global Segment Descriptor } */ \r
	23	/* 0x00 */ {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, //null descriptor \r
	24	/* 0x08 */ {{0xffff, 0, 0, 0x2, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //linear data segment descriptor\r
	25	/* 0x10 */ {{0xffff, 0, 0, 0xf, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //linear code segment descriptor\r
	26	/* 0x18 */ {{0xffff, 0, 0, 0x3, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //system data segment descriptor\r
	27	/* 0x20 */ {{0xffff, 0, 0, 0xa, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //system code segment descriptor\r
	28	/* 0x28 */ {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, //spare segment descriptor\r
	29	/* 0x30 */ {{0xffff, 0, 0, 0x2, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //system data segment descriptor\r
	30	/* 0x38 */ {{0xffff, 0, 0, 0xa, 1, 0, 1, 0xf, 0, 1, 0, 1, 0}}, //system code segment descriptor\r
	31	/* 0x40 */ {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, //spare segment descriptor\r
	32	};\r
	33	\r
	34	//\r
	35	// IA32 Gdt register\r
	36	//\r
	37	GLOBAL_REMOVE_IF_UNREFERENCED CONST IA32_DESCRIPTOR gGdt = {\r
	38	sizeof (gGdtEntries) - 1,\r
	39	(UINTN) gGdtEntries\r
	40	};\r
	41	\r
5d582956	42	GLOBAL_REMOVE_IF_UNREFERENCED IA32_DESCRIPTOR gLidtDescriptor = {\r
	43	sizeof (X64_IDT_GATE_DESCRIPTOR) * 32 - 1,\r
	44	0\r
	45	};\r
	46	\r
95276127	47	VOID\r
	48	HandOffToDxeCore (\r
	49	IN EFI_PHYSICAL_ADDRESS DxeCoreEntryPoint,\r
	50	IN EFI_PEI_HOB_POINTERS HobList,\r
	51	IN EFI_PEI_PPI_DESCRIPTOR *EndOfPeiSignal\r
	52	)\r
	53	{\r
	54	EFI_STATUS Status;\r
	55	EFI_PHYSICAL_ADDRESS BaseOfStack;\r
	56	EFI_PHYSICAL_ADDRESS TopOfStack;\r
	57	UINTN PageTables;\r
5d582956	58	X64_IDT_GATE_DESCRIPTOR *IdtTable;\r
	59	UINTN SizeOfTemplate;\r
	60	VOID *TemplateBase;\r
	61	EFI_PHYSICAL_ADDRESS VectorAddress;\r
	62	UINT32 Index;\r
95276127	63	\r
	64	Status = PeiServicesAllocatePages (EfiBootServicesData, EFI_SIZE_TO_PAGES (STACK_SIZE), &BaseOfStack);\r
	65	ASSERT_EFI_ERROR (Status);\r
	66	\r
	67	if (FeaturePcdGet(PcdDxeIplSwitchToLongMode)) {\r
	68	//\r
	69	// Compute the top of the stack we were allocated, which is used to load X64 dxe core. \r
	70	// Pre-allocate a 32 bytes which confroms to x64 calling convention.\r
	71	//\r
	72	// The first four parameters to a function are passed in rcx, rdx, r8 and r9. \r
	73	// Any further parameters are pushed on the stack. Furthermore, space (4 * 8bytes) for the \r
	74	// register parameters is reserved on the stack, in case the called function \r
	75	// wants to spill them; this is important if the function is variadic. \r
	76	//\r
	77	TopOfStack = BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - 32;\r
	78	\r
	79	//\r
	80	// X64 Calling Conventions requires that the stack must be aligned to 16 bytes\r
	81	//\r
	82	TopOfStack = (EFI_PHYSICAL_ADDRESS) (UINTN) ALIGN_POINTER (TopOfStack, 16);\r
	83	\r
	84	//\r
	85	// Load the GDT of Go64. Since the GDT of 32-bit Tiano locates in the BS_DATA\r
	86	// memory, it may be corrupted when copying FV to high-end memory \r
	87	//\r
	88	AsmWriteGdtr (&gGdt);\r
	89	//\r
	90	// Create page table and save PageMapLevel4 to CR3\r
	91	//\r
	92	PageTables = CreateIdentityMappingPageTables ();\r
	93	\r
	94	//\r
	95	// End of PEI phase singal\r
	96	//\r
	97	Status = PeiServicesInstallPpi (EndOfPeiSignal);\r
	98	ASSERT_EFI_ERROR (Status);\r
	99	\r
	100	AsmWriteCr3 (PageTables);\r
5d582956	101	\r
30c8f861	102	//\r
	103	// Update the contents of BSP stack HOB to reflect the real stack info passed to DxeCore.\r
	104	// \r
	105	UpdateStackHob (BaseOfStack, STACK_SIZE);\r
5d582956	106	\r
	107	if (FeaturePcdGet (PcdDxeIplEnableIdt)) {\r
	108	SizeOfTemplate = AsmGetVectorTemplatInfo (&TemplateBase);\r
	109	\r
	110	Status = PeiServicesAllocatePages (\r
	111	EfiBootServicesData, \r
	112	EFI_SIZE_TO_PAGES((SizeOfTemplate + sizeof (X64_IDT_GATE_DESCRIPTOR)) * 32), \r
	113	&VectorAddress\r
	114	);\r
	115	\r
	116	ASSERT_EFI_ERROR (Status);\r
	117	\r
	118	IdtTable = (X64_IDT_GATE_DESCRIPTOR ) (UINTN) (VectorAddress + SizeOfTemplate 32);\r
	119	for (Index = 0; Index < 32; Index++) {\r
	120	IdtTable[Index].Ia32IdtEntry.Bits.GateType = 0x8e;\r
	121	IdtTable[Index].Ia32IdtEntry.Bits.Reserved_0 = 0;\r
	122	IdtTable[Index].Ia32IdtEntry.Bits.Selector = SYS_CODE64_SEL;\r
	123	\r
	124	IdtTable[Index].Ia32IdtEntry.Bits.OffsetLow = (UINT16) VectorAddress;\r
f0a505a3	125	IdtTable[Index].Ia32IdtEntry.Bits.OffsetHigh = (UINT16) (RShiftU64 (VectorAddress, 16));\r
f0a505a3	126	IdtTable[Index].Offset32To63 = (UINT32) (RShiftU64 (VectorAddress, 32));\r
5d582956	127	IdtTable[Index].Reserved = 0;\r
	128	\r
	129	CopyMem ((VOID *) (UINTN) VectorAddress, TemplateBase, SizeOfTemplate);\r
	130	AsmVectorFixup ((VOID *) (UINTN) VectorAddress, (UINT8) Index);\r
	131	\r
	132	VectorAddress += SizeOfTemplate;\r
	133	}\r
	134	\r
	135	gLidtDescriptor.Base = (UINTN) IdtTable;\r
	136	AsmWriteIdtr (&gLidtDescriptor);\r
	137	}\r
	138	//\r
95276127	139	// Go to Long Mode. Interrupts will not get turned on until the CPU AP is loaded.\r
	140	// Call x64 drivers passing in single argument, a pointer to the HOBs.\r
	141	// \r
	142	AsmEnablePaging64 (\r
	143	SYS_CODE64_SEL,\r
	144	DxeCoreEntryPoint,\r
	145	(EFI_PHYSICAL_ADDRESS)(UINTN)(HobList.Raw),\r
	146	0,\r
	147	TopOfStack\r
	148	);\r
	149	} else {\r
	150	//\r
	151	// Compute the top of the stack we were allocated. Pre-allocate a UINTN\r
	152	// for safety.\r
	153	//\r
	154	TopOfStack = BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT;\r
	155	TopOfStack = (EFI_PHYSICAL_ADDRESS) (UINTN) ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);\r
	156	\r
	157	//\r
	158	// End of PEI phase singal\r
	159	//\r
	160	Status = PeiServicesInstallPpi (EndOfPeiSignal);\r
	161	ASSERT_EFI_ERROR (Status);\r
	162	\r
30c8f861	163	//\r
	164	// Update the contents of BSP stack HOB to reflect the real stack info passed to DxeCore.\r
	165	// \r
	166	UpdateStackHob (BaseOfStack, STACK_SIZE);\r
	167	\r
95276127	168	SwitchStack (\r
	169	(SWITCH_STACK_ENTRY_POINT)(UINTN)DxeCoreEntryPoint,\r
	170	HobList.Raw,\r
	171	NULL,\r
	172	(VOID *) (UINTN) TopOfStack\r
	173	);\r
	174	} \r
	175	}\r
	176	\r