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authorJordan Justen <jordan.l.justen@intel.com>2014-11-13 18:25:29 +0000
committerjljusten <jljusten@Edk2>2014-11-13 18:25:29 +0000
commit533263ee5a7fe83ad5a0d2da74ff30815c5ab63c (patch)
tree84f3cfd7a88fa023ee0cf3900c3d048a73c40d9d /UefiCpuPkg
parenta1e8986d97d8b3ce3ef2ff9d81f2d6ddf9d8dd1f (diff)
downloadedk2-platforms-533263ee5a7fe83ad5a0d2da74ff30815c5ab63c.tar.xz
UefiCpuPkg/CpuDxe: Add StartApsStackless routine
This routine starts the APs and directs them to run the specified code. The specified code is entered without a stack being available. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jordan Justen <jordan.l.justen@intel.com> Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com> Reviewed-by: Jeff Fan <jeff.fan@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16349 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'UefiCpuPkg')
-rw-r--r--UefiCpuPkg/CpuDxe/ApStartup.c304
-rw-r--r--UefiCpuPkg/CpuDxe/CpuDxe.h1
-rw-r--r--UefiCpuPkg/CpuDxe/CpuDxe.inf3
-rw-r--r--UefiCpuPkg/CpuDxe/CpuMp.h24
4 files changed, 332 insertions, 0 deletions
diff --git a/UefiCpuPkg/CpuDxe/ApStartup.c b/UefiCpuPkg/CpuDxe/ApStartup.c
new file mode 100644
index 0000000000..5477c52672
--- /dev/null
+++ b/UefiCpuPkg/CpuDxe/ApStartup.c
@@ -0,0 +1,304 @@
+/** @file
+ CPU DXE AP Startup
+
+ Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "CpuDxe.h"
+#include "CpuGdt.h"
+#include "CpuMp.h"
+
+#pragma pack(1)
+
+typedef struct {
+ UINT8 JmpToCli[2];
+
+ UINT16 GdtLimit;
+ UINT32 GdtBase;
+
+ UINT8 Cli;
+
+ UINT8 MovAxRealSegment; UINT16 RealSegment;
+ UINT8 MovDsAx[2];
+
+ UINT8 MovBxGdtr[3];
+ UINT8 LoadGdt[5];
+
+ UINT8 MovEaxCr0[2];
+ UINT32 MovEaxCr0Value;
+ UINT8 MovCr0Eax[3];
+
+ UINT8 FarJmp32Flat[2]; UINT32 FlatJmpOffset; UINT16 FlatJmpSelector;
+
+ //
+ // Now in IA32
+ //
+ UINT8 MovEaxCr4;
+ UINT32 MovEaxCr4Value;
+ UINT8 MovCr4Eax[3];
+
+ UINT8 MoveDataSelectorIntoAx[2]; UINT16 FlatDataSelector;
+ UINT8 MoveFlatDataSelectorFromAxToDs[2];
+ UINT8 MoveFlatDataSelectorFromAxToEs[2];
+ UINT8 MoveFlatDataSelectorFromAxToFs[2];
+ UINT8 MoveFlatDataSelectorFromAxToGs[2];
+ UINT8 MoveFlatDataSelectorFromAxToSs[2];
+
+#if defined (MDE_CPU_X64)
+ //
+ // Transition to X64
+ //
+ UINT8 MovEaxCr3;
+ UINT32 Cr3Value;
+ UINT8 MovCr3Eax[3];
+
+ UINT8 MoveCr4ToEax[3];
+ UINT8 SetCr4Bit5[4];
+ UINT8 MoveEaxToCr4[3];
+
+ UINT8 MoveLongModeEnableMsrToEcx[5];
+ UINT8 ReadLmeMsr[2];
+ UINT8 SetLongModeEnableBit[4];
+ UINT8 WriteLmeMsr[2];
+
+ UINT8 MoveCr0ToEax[3];
+ UINT8 SetCr0PagingBit[4];
+ UINT8 MoveEaxToCr0[3];
+ //UINT8 DeadLoop[2];
+
+ UINT8 FarJmp32LongMode; UINT32 LongJmpOffset; UINT16 LongJmpSelector;
+#endif // defined (MDE_CPU_X64)
+
+#if defined (MDE_CPU_X64)
+ UINT8 MovEaxOrRaxCpuDxeEntry[2]; UINTN CpuDxeEntryValue;
+#else
+ UINT8 MovEaxOrRaxCpuDxeEntry; UINTN CpuDxeEntryValue;
+#endif
+ UINT8 JmpToCpuDxeEntry[2];
+
+} STARTUP_CODE;
+
+#pragma pack()
+
+/**
+ This .asm code used for translating processor from 16 bit real mode into
+ 64 bit long mode. which help to create the mStartupCodeTemplate value.
+
+ To assemble:
+ * nasm -o ApStartup ApStartup.asm
+ Then disassemble:
+ * ndisasm -b 16 ApStartup
+ * ndisasm -b 16 -e 6 ApStartup
+ * ndisasm -b 32 -e 32 ApStartup (This -e offset may need adjustment)
+ * ndisasm -b 64 -e 0x83 ApStartup (This -e offset may need adjustment)
+
+ %define DEFAULT_CR0 0x00000023
+ %define DEFAULT_CR4 0x640
+
+ BITS 16
+
+ jmp short TransitionFromReal16To32BitFlat
+
+ ALIGN 2
+
+ Gdtr:
+ dw 0x5a5a
+ dd 0x5a5a5a5a
+
+ ;
+ ; Modified: EAX, EBX
+ ;
+ TransitionFromReal16To32BitFlat:
+
+ cli
+ mov ax, 0x5a5a
+ mov ds, ax
+
+ mov bx, Gdtr
+ o32 lgdt [ds:bx]
+
+ mov eax, cr4
+ btc eax, 5
+ mov cr4, eax
+
+ mov eax, DEFAULT_CR0
+ mov cr0, eax
+
+ jmp 0x5a5a:dword jumpTo32BitAndLandHere
+ BITS 32
+ jumpTo32BitAndLandHere:
+
+ mov eax, DEFAULT_CR4
+ mov cr4, eax
+
+ mov ax, 0x5a5a
+ mov ds, ax
+ mov es, ax
+ mov fs, ax
+ mov gs, ax
+ mov ss, ax
+
+ ;
+ ; Jump to CpuDxe for IA32
+ ;
+ mov eax, 0x5a5a5a5a
+ or eax, eax
+ jz Transition32FlatTo64Flat
+ jmp eax
+
+ ;
+ ; Transition to X64
+ ;
+ Transition32FlatTo64Flat:
+ mov eax, 0x5a5a5a5a
+ mov cr3, eax
+
+ mov eax, cr4
+ bts eax, 5 ; enable PAE
+ mov cr4, eax
+
+ mov ecx, 0xc0000080
+ rdmsr
+ bts eax, 8 ; set LME
+ wrmsr
+
+ mov eax, cr0
+ bts eax, 31 ; set PG
+ mov cr0, eax ; enable paging
+
+ ;
+ ; Jump to CpuDxe for X64
+ ;
+ jmp 0x5a5a:jumpTo64BitAndLandHere
+ BITS 64
+ jumpTo64BitAndLandHere:
+ mov rax, 0xcdcdcdcdcdcdcdcd
+ jmp rax
+**/
+STARTUP_CODE mStartupCodeTemplate = {
+ { 0xeb, 0x06 }, // Jump to cli
+ 0, // GDT Limit
+ 0, // GDT Base
+ 0xfa, // cli (Clear Interrupts)
+ 0xb8, 0x0000, // mov ax, RealSegment
+ { 0x8e, 0xd8 }, // mov ds, ax
+ { 0xBB, 0x02, 0x00 }, // mov bx, Gdtr
+ { 0x3e, 0x66, 0x0f, 0x01, 0x17 }, // lgdt [ds:bx]
+ { 0x66, 0xB8 }, 0x00000023, // mov eax, cr0 value
+ { 0x0F, 0x22, 0xC0 }, // mov cr0, eax
+ { 0x66, 0xEA }, // far jmp to 32-bit flat
+ OFFSET_OF(STARTUP_CODE, MovEaxCr4),
+ LINEAR_CODE_SEL,
+ 0xB8, 0x00000640, // mov eax, cr4 value
+ { 0x0F, 0x22, 0xe0 }, // mov cr4, eax
+ { 0x66, 0xb8 }, CPU_DATA_SEL, // mov ax, FlatDataSelector
+ { 0x8e, 0xd8 }, // mov ds, ax
+ { 0x8e, 0xc0 }, // mov es, ax
+ { 0x8e, 0xe0 }, // mov fs, ax
+ { 0x8e, 0xe8 }, // mov gs, ax
+ { 0x8e, 0xd0 }, // mov ss, ax
+
+#if defined (MDE_CPU_X64)
+ 0xB8, 0x00000000, // mov eax, cr3 value
+ { 0x0F, 0x22, 0xd8 }, // mov cr3, eax
+
+ { 0x0F, 0x20, 0xE0 }, // mov eax, cr4
+ { 0x0F, 0xBA, 0xE8, 0x05 }, // bts eax, 5
+ { 0x0F, 0x22, 0xE0 }, // mov cr4, eax
+
+ { 0xB9, 0x80, 0x00, 0x00, 0xC0 }, // mov ecx, 0xc0000080
+ { 0x0F, 0x32 }, // rdmsr
+ { 0x0F, 0xBA, 0xE8, 0x08 }, // bts eax, 8
+ { 0x0F, 0x30 }, // wrmsr
+
+ { 0x0F, 0x20, 0xC0 }, // mov eax, cr0
+ { 0x0F, 0xBA, 0xE8, 0x1F }, // bts eax, 31
+ { 0x0F, 0x22, 0xC0 }, // mov cr0, eax
+
+ 0xEA, // FarJmp32LongMode
+ OFFSET_OF(STARTUP_CODE, MovEaxOrRaxCpuDxeEntry),
+ LINEAR_CODE64_SEL,
+#endif // defined (MDE_CPU_X64)
+
+ //0xeb, 0xfe, // jmp $
+#if defined (MDE_CPU_X64)
+ { 0x48, 0xb8 }, 0x0, // mov rax, X64 CpuDxe MP Entry Point
+#else
+ 0xB8, 0x0, // mov eax, IA32 CpuDxe MP Entry Point
+#endif
+ { 0xff, 0xe0 }, // jmp to eax/rax (CpuDxe MP Entry Point)
+
+};
+
+
+/**
+ Starts the Application Processors and directs them to jump to the
+ specified routine.
+
+ The processor jumps to this code in flat mode, but the processor's
+ stack is not initialized.
+
+ @param ApEntryPoint Pointer to the Entry Point routine
+
+ @retval EFI_SUCCESS The APs were started
+ @retval EFI_OUT_OF_RESOURCES Cannot allocate memory to start APs
+
+**/
+EFI_STATUS
+StartApsStackless (
+ IN STACKLESS_AP_ENTRY_POINT ApEntryPoint
+ )
+{
+ EFI_STATUS Status;
+ volatile STARTUP_CODE *StartupCode;
+ IA32_DESCRIPTOR Gdtr;
+ EFI_PHYSICAL_ADDRESS StartAddress;
+
+ StartAddress = BASE_1MB;
+ Status = gBS->AllocatePages (
+ AllocateMaxAddress,
+ EfiACPIMemoryNVS,
+ EFI_SIZE_TO_PAGES (sizeof (*StartupCode)),
+ &StartAddress
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ StartupCode = (STARTUP_CODE*)(VOID*)(UINTN) StartAddress;
+ CopyMem ((VOID*) StartupCode, &mStartupCodeTemplate, sizeof (*StartupCode));
+ StartupCode->RealSegment = (UINT16) (((UINTN) StartAddress) >> 4);
+
+ AsmReadGdtr (&Gdtr);
+ StartupCode->GdtLimit = Gdtr.Limit;
+ StartupCode->GdtBase = (UINT32) Gdtr.Base;
+
+ StartupCode->CpuDxeEntryValue = (UINTN) ApEntryPoint;
+
+ StartupCode->FlatJmpOffset += (UINT32) StartAddress;
+
+#if defined (MDE_CPU_X64)
+ StartupCode->Cr3Value = (UINT32) AsmReadCr3 ();
+ StartupCode->LongJmpOffset += (UINT32) StartAddress;
+#endif
+
+ SendInitSipiSipiAllExcludingSelf ((UINT32)(UINTN)(VOID*) StartupCode);
+
+ //
+ // Wait 100 milliseconds for APs to arrive at the ApEntryPoint routine
+ //
+ MicroSecondDelay (100 * 1000);
+
+ gBS->FreePages (StartAddress, EFI_SIZE_TO_PAGES (sizeof (*StartupCode)));
+
+ return EFI_SUCCESS;
+}
+
diff --git a/UefiCpuPkg/CpuDxe/CpuDxe.h b/UefiCpuPkg/CpuDxe/CpuDxe.h
index 2001cfc605..2aef626cd5 100644
--- a/UefiCpuPkg/CpuDxe/CpuDxe.h
+++ b/UefiCpuPkg/CpuDxe/CpuDxe.h
@@ -32,6 +32,7 @@
#include <Library/UefiCpuLib.h>
#include <Library/UefiLib.h>
#include <Library/CpuExceptionHandlerLib.h>
+#include <Library/TimerLib.h>
#include <Guid/IdleLoopEvent.h>
#include <Guid/VectorHandoffTable.h>
diff --git a/UefiCpuPkg/CpuDxe/CpuDxe.inf b/UefiCpuPkg/CpuDxe/CpuDxe.inf
index 9952eb7007..c2f12b7bba 100644
--- a/UefiCpuPkg/CpuDxe/CpuDxe.inf
+++ b/UefiCpuPkg/CpuDxe/CpuDxe.inf
@@ -41,11 +41,14 @@
UefiCpuLib
UefiLib
CpuExceptionHandlerLib
+ TimerLib
[Sources]
+ ApStartup.c
CpuDxe.c
CpuDxe.h
CpuGdt.c
+ CpuGdt.h
CpuMp.c
CpuMp.h
diff --git a/UefiCpuPkg/CpuDxe/CpuMp.h b/UefiCpuPkg/CpuDxe/CpuMp.h
index dd2d0e1200..e28f162f53 100644
--- a/UefiCpuPkg/CpuDxe/CpuMp.h
+++ b/UefiCpuPkg/CpuDxe/CpuMp.h
@@ -24,6 +24,30 @@ InitializeMpSupport (
VOID
);
+typedef
+VOID
+(EFIAPI *STACKLESS_AP_ENTRY_POINT)(
+ VOID
+ );
+
+/**
+ Starts the Application Processors and directs them to jump to the
+ specified routine.
+
+ The processor jumps to this code in flat mode, but the processor's
+ stack is not initialized.
+
+ @param ApEntryPoint Pointer to the Entry Point routine
+
+ @retval EFI_SUCCESS The APs were started
+ @retval EFI_OUT_OF_RESOURCES Cannot allocate memory to start APs
+
+**/
+EFI_STATUS
+StartApsStackless (
+ IN STACKLESS_AP_ENTRY_POINT ApEntryPoint
+ );
+
/**
The AP entry point that the Startup-IPI target code will jump to.
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-19 20:30:10 +0000