Changeset 58803 in vbox for trunk/src/VBox/Devices/EFI/Firmware/UefiCpuPkg

Timestamp:

Nov 20, 2015 5:21:41 PM (9 years ago)

Author:

vboxsync

Message:

EFI/Firmware: Fix page table location for amd64 after MEMFD had to be relocated because of OS X guests. The page table location must match the gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPageTablesBase PCD defined in OvmfPkgX64.fdf. Remove unused modifications in the old ResetVector code which now moved to OvmfPkg

File:

• trunk/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/ResetVector/Vtf0/Ia32/Flat32ToFlat64.asm (modified) (1 diff)

trunk/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/ResetVector/Vtf0/Ia32/Flat32ToFlat64.asm

@@ -14 +14 @@
 ;------------------------------------------------------------------------------
 
-%ifdef VBOX
- %include "VBox/nasm.mac"
- %include "iprt/x86.mac"
-
- ;;
- ; Macro for filling in page table entries with EAX as base content.
- ;
- ; @param    %1  What to increment EAX with for each iteration.
- ; @param    %2  Start address.
- ; @param    %3  End address (exclusive).
- ; @uses     EAX, EBX, EFLAGS
- ;
- %macro FILL_ENTRIES 3
-     mov     ebx, %2
- %%myloop:
-     mov     [ebx], eax
-     mov     dword [ebx + 4], 0
-     add     eax, %1
-     add     ebx, 8
-     cmp     ebx, %3
-     jb      %%myloop
- %endmacro
-
- ;;
- ; Macro for filling in page table entries with zeros.
- ;
- ; @param    %1 Start address.
- ; @param    %2  End address (exclusive).
- ; @uses     EAX, EBX, EFLAGS
- ;
- %macro ZERO_ENTRIES 2
-     mov     ebx, %1
-     xor     eax, eax
- %%myloop:
-     mov     [ebx], eax
-     mov     dword [ebx + 4], eax
-     add     ebx, 8
-     cmp     ebx, %2
-     jb      %%myloop
- %endmacro
-
- ;;
- ; The address of the page tables.
- %define VBOX_PDPT_ADDR     (0x00800000 - 0x6000)
- %define VBOX_PDPTR_ADDR    (0x00800000 - 0x2000)
- %define VBOX_PML4_ADDR     (0x00800000 - 0x1000)
-
-%endif ; VBOX
-
-
 BITS    32
 
 ;
-%ifndef VBOX
 ; Modified:  EAX
-%else
-; Modified:  EAX, EBX
-%endif
 ;
 Transition32FlatTo64Flat:
 
-%ifndef VBOX
-    mov     eax, ((ADDR_OF_START_OF_RESET_CODE & ~0xfff) - 0x1000)
-%else ; !VBOX
-    ;
-    ; Produce our own page table that does not reside in ROM, since the PGM
-    ; pool code cannot quite cope with write monitoring ROM pages.
-    ;
-
-    ; First, set up page directories with 2MB pages for the first 4GB.
-    mov     eax, ( X86_PDE4M_P | X86_PDE4M_A | X86_PDE4M_PS | X86_PDE4M_PCD | X86_PDE4M_RW | X86_PDE4M_D )
-    FILL_ENTRIES X86_PAGE_2M_SIZE, VBOX_PDPT_ADDR, VBOX_PDPT_ADDR + 0x4000
-
-    ; Second, set up page a directory pointer table with 4 entries pointing to
-    ; the PTPDs we created above and the remainder as zeros.
-    mov     eax, ( X86_PDPE_P | X86_PDPE_RW | X86_PDPE_A | X86_PDPE_PCD ) + VBOX_PDPT_ADDR
-    FILL_ENTRIES X86_PAGE_4K_SIZE, VBOX_PDPTR_ADDR, VBOX_PDPTR_ADDR + 4*8
-    ZERO_ENTRIES VBOX_PDPTR_ADDR + 4*8, VBOX_PDPTR_ADDR + 0x1000
-
-    ; Third, set up a PML4 with the first entry pointing to the previous table.
-    mov     dword [VBOX_PML4_ADDR], ( X86_PML4E_P | X86_PML4E_PCD | X86_PML4E_A | X86_PML4E_RW ) + VBOX_PDPTR_ADDR
-    mov     dword [VBOX_PML4_ADDR + 4], 0
-    ZERO_ENTRIES VBOX_PML4_ADDR + 1*8, VBOX_PML4_ADDR + 0x1000
-
-    mov     eax, VBOX_PML4_ADDR
-%endif
     OneTimeCall SetCr3ForPageTables64