started in on a bunch of memory management code
This commit is contained in:
Eric J. Bowersox
61
include/comrogue/internals/memmgr.h
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61
include/comrogue/internals/memmgr.h
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@@ -0,0 +1,61 @@
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/*
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* This file is part of the COMROGUE Operating System for Raspberry Pi
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*
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* Copyright (c) 2013, Eric J. Bowersox / Erbosoft Enterprises
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* All rights reserved.
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*
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* This program is free for commercial and non-commercial use as long as the following conditions are
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* adhered to.
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*
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* Copyright in this file remains Eric J. Bowersox and/or Erbosoft, and as such any copyright notices
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* in the code are not to be removed.
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*
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* Redistribution and use in source and binary forms, with or without modification, are permitted
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* provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this list of conditions and
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* the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
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* the following disclaimer in the documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* "Raspberry Pi" is a trademark of the Raspberry Pi Foundation.
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*/
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#ifndef __MEMMGR_H_INCLUDED
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#define __MEMMGR_H_INCLUDED
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#ifdef __COMROGUE_INTERNALS__
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#ifndef __ASM__
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#include <comrogue/types.h>
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#include <comrogue/compiler_macros.h>
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#include <comrogue/internals/mmu.h>
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#include <comrogue/internals/startup.h>
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CDECL_BEGIN
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/* Page mapping functions */
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extern PHYSADDR MmGetPhysAddr(PTTB pTTB, KERNADDR vma);
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extern HRESULT MmDemapPages(PTTB pTTB, KERNADDR vmaBase, UINT32 cpg);
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extern HRESULT MmMapPages(PTTB pTTB, PHYSADDR paBase, KERNADDR vmaBase, UINT32 cpg, UINT32 uiTableFlags,
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UINT32 uiPageFlags);
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/* Initialization functions only */
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extern void _MmInit(PSTARTUP_INFO pstartup);
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CDECL_END
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#endif /* __ASM__ */
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#endif /* __COMROGUE_INTERNALS__ */
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#endif /* __MEMMGR_H_INCLUDED */
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@@ -43,6 +43,7 @@
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#define SYS_PAGE_SIZE 4096 /* standard page size for normal page */
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#define SYS_PAGE_BITS 12 /* log2(SYS_PAGE_SIZE), number of bits in a page address */
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#define SYS_TTB0_SIZE 8192 /* TTB0 must be located on this boundary and is this size */
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#define SYS_TTB0_ENTRIES 2048 /* SYS_TTB0_SIZE/4, number of entries in TTB0 */
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#define SYS_TTB1_SIZE 16384 /* TTB1 must be located on this boundary and is this size */
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#define SYS_TTB1_ENTRIES 4096 /* SYS_TTB1_SIZE/4, number of entries in TTB1 */
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#define SYS_TTB_BITS 12 /* log2(SYS_TTB1_SIZE/4), number of bits in a TTB address */
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@@ -124,6 +125,16 @@
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#define PGQUERY_SM 0x00000002 /* small page (4K) */
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#define PGQUERY_SM_XN 0x00000003 /* small page with Execute-Never set */
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/* Combinations of flags we use regularly. */
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#define TTBFLAGS_LIB_CODE TTBPGTBL_ALWAYS
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#define PGTBLFLAGS_LIB_CODE (PGTBLSM_ALWAYS | PGTBLSM_B | PGTBLSM_C | PGTBLSM_AP10)
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#define TTBFLAGS_KERNEL_CODE TTBPGTBL_ALWAYS
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#define PGTBLFLAGS_KERNEL_CODE (PGTBLSM_ALWAYS | PGTBLSM_B | PGTBLSM_C | PGTBLSM_AP01)
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#define TTBFLAGS_KERNEL_DATA TTBPGTBL_ALWAYS
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#define PGTBLFLAGS_KERNEL_DATA (PGTBLSM_XN | PGTBLSM_ALWAYS | PGTBLSM_B | PGTBLSM_C | PGTBLSM_AP01)
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#define TTBFLAGS_MMIO TTBPGTBL_ALWAYS
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#define PGTBLFLAGS_MMIO (PGTBLSM_ALWAYS | PGTBLSM_AP01)
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#ifndef __ASM__
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/*-------------------------------------------------------
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@@ -224,16 +235,21 @@ typedef struct tagPAGETAB {
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/* internal structure of a MPDB entry */
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typedef struct tagMPDB1 {
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PHYSADDR paPTE; /* PA of page table entry for the page */
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unsigned next : 20; /* index of "next" entry in list */
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unsigned tag : 12; /* page tag */
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} MPDB1;
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/* The MPDB entry itself. */
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typedef union tagMPDB {
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UINT32 raw; /* raw data */
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UINT64 raw; /* raw data */
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MPDB1 d; /* structured data */
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} MPDB, *PMPDB;
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/* Page index macros */
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#define mmPA2PageIndex(pa) ((pa) >> SYS_PAGE_BITS)
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#define mmPageIndex2PA(ndx) ((ndx) << SYS_PAGE_BITS)
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#endif /* __ASM__ */
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#endif /* __COMROGUE_INTERNALS__ */
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