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hw_x86_64: Factor out initial PT to separate file 

This allows the specification of different initial pagetables for a
platform based on x86_64 (e.g. Muen).
This commit is contained in:
Reto Buerki 2015-04-22 09:41:42 +02:00 committed by Christian Helmuth
parent 9d4f410988
commit bb06826c95
3 changed files with 52 additions and 35 deletions
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1
repos/base-hw/lib/mk/x86_64/core.mk
View File

@ -11,6 +11,7 @@ INC_DIR += $(REP_DIR)/src/core/include/spec/x86_64
# add assembly sources
SRC_S += spec/x86_64/mode_transition.s
SRC_S += spec/x86_64/kernel/crt0.s
SRC_S += spec/x86_64/kernel/crt0_translation_table.s
SRC_S += spec/x86_64/crt0.s
# add C++ sources

35
repos/base-hw/src/core/spec/x86_64/kernel/crt0.s
View File

@ -123,38 +123,3 @@
.p2align 8
.space 32 * 1024
_stack_high:
.data
/****************************************
** Initial pagetables **
** Identity mapping from 2MiB to 4MiB **
****************************************/
/* PML4 */
.p2align MIN_PAGE_SIZE_LOG2
_kernel_pml4:
.quad _kernel_pdp + 0xf
.fill 511, 8, 0x0
/* PDP */
.p2align MIN_PAGE_SIZE_LOG2
_kernel_pdp:
.quad _kernel_pd + 0xf
.fill 2, 8, 0x0
.quad _kernel_pd_503 + 0xf
.fill 508, 8, 0x0
/* PD */
.p2align MIN_PAGE_SIZE_LOG2
_kernel_pd:
.quad 0
.quad 0x20018f
.fill 510, 8, 0x0
.p2align MIN_PAGE_SIZE_LOG2
_kernel_pd_503:
.fill 502, 8, 0x0
.quad 0xfec0019f
.quad 0xfee0019f
.fill 8, 8, 0x0

51
repos/base-hw/src/core/spec/x86_64/kernel/crt0_translation_table.s Normal file
View File

@ -0,0 +1,51 @@
/*
* \brief Initial pagetables for x86_64
* \author Adrian-Ken Rueegsegger
* \author Reto Buerki
* \date 2015-04-22
*/
/*
* Copyright (C) 2015 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
.include "macros.s"
.data
/********************************************
** Identity mapping from 2MiB to 4MiB **
** plus mappings for LAPIC, I/O APIC MMIO **
********************************************/
/* PML4 */
.p2align MIN_PAGE_SIZE_LOG2
.global _kernel_pml4
_kernel_pml4:
.quad _kernel_pdp + 0xf
.fill 511, 8, 0x0
/* PDP */
.p2align MIN_PAGE_SIZE_LOG2
_kernel_pdp:
.quad _kernel_pd + 0xf
.fill 2, 8, 0x0
.quad _kernel_pd_503 + 0xf
.fill 508, 8, 0x0
/* PD */
.p2align MIN_PAGE_SIZE_LOG2
_kernel_pd:
.quad 0
.quad 0x20018f
.fill 510, 8, 0x0
.p2align MIN_PAGE_SIZE_LOG2
_kernel_pd_503:
.fill 502, 8, 0x0
.quad 0xfec0019f
.quad 0xfee0019f
.fill 8, 8, 0x0