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OvmfPkg LoadLinuxLib: Use kernel's EFI entry point where available 

Usage of the EFI entry point was made feasible in the kernel
x64 boot protocol 2.12 where a 32-bit & 64-bit entry point
became well defined.

http://git.kernel.org/linus/09c205af

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14132 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
jljusten 2013-02-14 19:21:39 +00:00
parent 25ca06f9a0
commit dd71f6e287
6 changed files with 107 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
OvmfPkg/Library/LoadLinuxLib/Ia32/JumpToKernel.S
View File

@ -1,6 +1,6 @@
#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
# Copyright (c) 2006 - 2013, 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
@ -13,6 +13,7 @@
#------------------------------------------------------------------------------
ASM_GLOBAL ASM_PFX(JumpToKernel)
ASM_GLOBAL ASM_PFX(JumpToUefiKernel)
#------------------------------------------------------------------------------
# VOID
@ -27,3 +28,19 @@ ASM_PFX(JumpToKernel):
calll 0x4(%esp)
ret
#------------------------------------------------------------------------------
# VOID
# EFIAPI
# JumpToUefiKernel (
# EFI_HANDLE ImageHandle,
# EFI_SYSTEM_TABLE *SystemTable,
# VOID *KernelBootParams,
# VOID *KernelStart
# );
#------------------------------------------------------------------------------
ASM_PFX(JumpToUefiKernel):
movl 0xc(%esp), %eax
movl 0x264(%eax), %eax
addl 0x10(%esp), %eax
jmp %eax

21
OvmfPkg/Library/LoadLinuxLib/Ia32/JumpToKernel.asm
View File

@ -1,6 +1,6 @@
;------------------------------------------------------------------------------
;
; Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
; Copyright (c) 2006 - 2013, 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
@ -32,4 +32,23 @@ JumpToKernel PROC
JumpToKernel ENDP
;------------------------------------------------------------------------------
; VOID
; EFIAPI
; JumpToUefiKernel (
; EFI_HANDLE ImageHandle,
; EFI_SYSTEM_TABLE *SystemTable,
; VOID *KernelBootParams,
; VOID *KernelStart
; );
;------------------------------------------------------------------------------
JumpToUefiKernel PROC
mov eax, [esp + 12]
mov eax, [eax + 264h]
add eax, [esp + 16]
jmp eax
JumpToUefiKernel ENDP
END

17
OvmfPkg/Library/LoadLinuxLib/Linux.c
View File

@ -604,14 +604,11 @@ SetupGraphics (
STATIC
EFI_STATUS
SetupLinuxBootParams (
IN VOID *Kernel,
IN OUT struct boot_params *Bp
)
{
SetupGraphics (Bp);
Bp->hdr.code32_start = (UINT32)(UINTN) Kernel;
SetupLinuxMemmap (Bp);
return EFI_SUCCESS;
@ -644,7 +641,19 @@ LoadLinux (
InitLinuxDescriptorTables ();
SetupLinuxBootParams (Kernel, (struct boot_params*) KernelSetup);
Bp->hdr.code32_start = (UINT32)(UINTN) Kernel;
if (Bp->hdr.version >= 0x20c && Bp->hdr.handover_offset &&
(Bp->hdr.load_flags & (sizeof (UINTN) == 4 ? BIT2 : BIT3))) {
DEBUG ((EFI_D_INFO, "Jumping to kernel EFI handover point at ofs %x\n", Bp->hdr.handover_offset));
DisableInterrupts ();
JumpToUefiKernel ((VOID*) gImageHandle, (VOID*) gST, KernelSetup, Kernel);
}
//
// Old kernels without EFI handover protocol
//
SetupLinuxBootParams (KernelSetup);
DEBUG ((EFI_D_INFO, "Jumping to kernel\n"));
DisableInterrupts ();

11
OvmfPkg/Library/LoadLinuxLib/LoadLinuxLib.h
View File

@ -1,7 +1,7 @@
/** @file
Boot UEFI Linux.
Copyright (c) 2008 - 2011, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2008 - 2013, 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
@ -36,6 +36,15 @@ JumpToKernel (
VOID *KernelBootParams
);
VOID
EFIAPI
JumpToUefiKernel (
EFI_HANDLE ImageHandle,
EFI_SYSTEM_TABLE *SystemTable,
VOID *KernelBootParams,
VOID *KernelStart
);
VOID
InitLinuxDescriptorTables (
VOID

22
OvmfPkg/Library/LoadLinuxLib/X64/JumpToKernel.S
View File

@ -13,6 +13,7 @@
#------------------------------------------------------------------------------
ASM_GLOBAL ASM_PFX(JumpToKernel)
ASM_GLOBAL ASM_PFX(JumpToUefiKernel)
#------------------------------------------------------------------------------
# VOID
@ -67,3 +68,24 @@ ASM_PFX(JumpToKernel):
ret
.code64
#------------------------------------------------------------------------------
# VOID
# EFIAPI
# JumpToUefiKernel (
# EFI_HANDLE ImageHandle, // rcx
# EFI_SYSTEM_TABLE *SystemTable, // rdx
# VOID *KernelBootParams, // r8
# VOID *KernelStart // r9
# );
#------------------------------------------------------------------------------
ASM_PFX(JumpToUefiKernel):
movq %rcx, %rdi
movq %rdx, %rsi
movq %r8, %rdx
xor %rax, %rax
movl 0x264(%r8), %eax
addq %rax, %r9
addq $0x200, %r9
callq %r9
ret

24
OvmfPkg/Library/LoadLinuxLib/X64/JumpToKernel.asm
View File

@ -68,4 +68,28 @@ JumpToKernel PROC
JumpToKernel ENDP
;------------------------------------------------------------------------------
; VOID
; EFIAPI
; JumpToUefiKernel (
; EFI_HANDLE ImageHandle, // rcx
; EFI_SYSTEM_TABLE *SystemTable, // rdx
; VOID *KernelBootParams // r8
; VOID *KernelStart, // r9
; );
;------------------------------------------------------------------------------
JumpToUefiKernel PROC
mov rdi, rcx
mov rsi, rdx
mov rdx, r8
xor rax, rax
mov eax, [r8 + 264h]
add r9, rax
add r9, 200h
call r9
ret
JumpToUefiKernel ENDP
END