From b382ede3864e17e8827dbc90c7d4f1540b94ff3f Mon Sep 17 00:00:00 2001 From: Jordan Justen Date: Tue, 21 Jan 2014 19:38:34 +0000 Subject: OvmfPkg X64 ResetVector: Move page tables from 512KB to 8MB To help consolidate OVMF fixed memory uses, we declare this range in MEMFD and thereby move it to 8MB. We also now declare the table range in the FDF to set PCDs. This allows us to ASSERT that CR3 is set as expected in OVMF SEC. OvmfPkgIa32.fdf and OvmfPkgIa32X64.fdf are updated simply for consistency. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jordan Justen Reviewed-by: Laszlo Ersek git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15146 6f19259b-4bc3-4df7-8a09-765794883524 --- OvmfPkg/ResetVector/Bin/ResetVector.x64.raw | Bin 628 -> 628 bytes OvmfPkg/ResetVector/Ia32/PageTables64.asm | 22 ++++++++++++---------- 2 files changed, 12 insertions(+), 10 deletions(-) (limited to 'OvmfPkg/ResetVector') diff --git a/OvmfPkg/ResetVector/Bin/ResetVector.x64.raw b/OvmfPkg/ResetVector/Bin/ResetVector.x64.raw index 237d08a293..a3fc97c93e 100644 Binary files a/OvmfPkg/ResetVector/Bin/ResetVector.x64.raw and b/OvmfPkg/ResetVector/Bin/ResetVector.x64.raw differ diff --git a/OvmfPkg/ResetVector/Ia32/PageTables64.asm b/OvmfPkg/ResetVector/Ia32/PageTables64.asm index 8280e8f140..b5a4cf8d71 100644 --- a/OvmfPkg/ResetVector/Ia32/PageTables64.asm +++ b/OvmfPkg/ResetVector/Ia32/PageTables64.asm @@ -44,8 +44,10 @@ BITS 32 SetCr3ForPageTables64: ; - ; For OVMF, build some initial page tables at 0x80000. This is just - ; after the early stack/temp RAM. + ; For OVMF, build some initial page tables at 0x800000-0x806000. + ; + ; This range should match with PcdOvmfSecPageTablesBase and + ; PcdOvmfSecPageTablesSize which are declared in the FDF files. ; ; At the end of PEI, the pages tables will be rebuilt into a ; more permanent location by DxeIpl. @@ -54,21 +56,21 @@ SetCr3ForPageTables64: mov ecx, 6 * 0x1000 / 4 xor eax, eax clearPageTablesMemoryLoop: - mov dword[ecx * 4 + 0x80000 - 4], eax + mov dword[ecx * 4 + 0x800000 - 4], eax loop clearPageTablesMemoryLoop ; ; Top level Page Directory Pointers (1 * 512GB entry) ; - mov dword[0x80000], 0x81000 + PAGE_PDP_ATTR + mov dword[0x800000], 0x801000 + PAGE_PDP_ATTR ; ; Next level Page Directory Pointers (4 * 1GB entries => 4GB) ; - mov dword[0x81000], 0x82000 + PAGE_PDP_ATTR - mov dword[0x81008], 0x83000 + PAGE_PDP_ATTR - mov dword[0x81010], 0x84000 + PAGE_PDP_ATTR - mov dword[0x81018], 0x85000 + PAGE_PDP_ATTR + mov dword[0x801000], 0x802000 + PAGE_PDP_ATTR + mov dword[0x801008], 0x803000 + PAGE_PDP_ATTR + mov dword[0x801010], 0x804000 + PAGE_PDP_ATTR + mov dword[0x801018], 0x805000 + PAGE_PDP_ATTR ; ; Page Table Entries (2048 * 2MB entries => 4GB) @@ -79,13 +81,13 @@ pageTableEntriesLoop: dec eax shl eax, 21 add eax, PAGE_2M_PDE_ATTR - mov [ecx * 8 + 0x82000 - 8], eax + mov [ecx * 8 + 0x802000 - 8], eax loop pageTableEntriesLoop ; ; Set CR3 now that the paging structures are available ; - mov eax, 0x80000 + mov eax, 0x800000 mov cr3, eax OneTimeCallRet SetCr3ForPageTables64 -- cgit v1.2.3