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implemented enough of the page allocator to fill in the gaps in the VM mapper

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This commit is contained in:
Eric J. Bowersox
2013-04-27 23:33:29 -06:00
parent b23fd6b6e5
commit a7fb97cb3a
5 changed files with 769 additions and 21 deletions
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14
include/comrogue/internals/memmgr.h
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@@ -58,9 +58,19 @@ typedef struct tagVMCTXT {
PTTB pTTB; /* pointer to the TTB */
PTTBAUX pTTBAux; /* pointer to the TTB auxiliary data */
UINT32 uiMaxIndex; /* max index into the above tables */
PHYSADDR paTTB; /* physical address of the TTB */
RBTREE rbtPageTables; /* tree containing page tables this context owns */
} VMCTXT, *PVMCTXT;
/* Pointer to a function to update the page database with a PTE address. */
typedef void (*PFNSETPTEADDR)(UINT32, PHYSADDR, BOOL);
/* Invalid page return. */
#define INVALID_PAGE ((UINT32)(-1))
/* Page allocation flags. */
#define PGALLOC_ZERO 0x00000001 /* allocated page must be zeroed */
CDECL_BEGIN
/* Low-level maintenance functions */
@@ -86,6 +96,10 @@ extern HRESULT MmMapKernelPages(PHYSADDR paBase, UINT32 cpg, UINT32 uiTableFlags
UINT32 uiPageFlags, UINT32 uiAuxFlags, PKERNADDR pvmaLocation);
extern HRESULT MmDemapKernelPages(KERNADDR vmaBase, UINT32 cpg);
/* Page allocation functions */
extern HRESULT MmAllocatePage(UINT32 uiFlags, UINT32 tag, UINT32 subtag, PPHYSADDR ppaNewPage);
extern HRESULT MmFreePage(PHYSADDR paPage, UINT32 tag, UINT32 subtag);
/* Initialization functions only */
extern void _MmInit(PSTARTUP_INFO pstartup);

58
include/comrogue/internals/mmu.h
View File

@@ -34,9 +34,9 @@
#ifdef __COMROGUE_INTERNALS__
/*----------------------------------------------
* BCM2835 ARM Memory Management Unit constants
*----------------------------------------------
/*---------------------------------------------------------------------------------------------
* BCM2835 ARM Memory Management Unit constants (and other COMROGUE-specific memory constants)
*---------------------------------------------------------------------------------------------
*/
/* Memory system constants */
@@ -74,6 +74,9 @@
#define TTBSEC_SBASE 0xFF000000 /* supersection base address mask */
#define TTBSEC_SBASEHI 0x00F00000 /* supersection high base address mask */
/* Flags that are safe to alter for a section. */
#define TTBSEC_SAFEFLAGS (TTBSEC_ALLFLAGS & ~(TTBSEC_ALWAYS | TTBSEC_SUPER))
/* AP bits for the standard access control model */
#define TTBSEC_AP00 0x00000000 /* no access */
#define TTBSEC_AP01 0x00000400 /* supervisor only access */
@@ -94,6 +97,9 @@
#define TTBPGTBL_ALLFLAGS 0x000003FF /* "all flags" mask */
#define TTBPGTBL_BASE 0xFFFFFC00 /* page table base address mask */
/* Flags that are safe to alter for a TTB page table entry. */
#define TTBPGTBL_SAFEFLAGS (TTBPGTBL_ALLFLAGS & ~0x03)
/* Bits to query the type of TTB entry we're looking at */
#define TTBQUERY_MASK 0x00000003 /* bits we can query */
#define TTBQUERY_FAULT 0x00000000 /* indicates a fault */
@@ -104,6 +110,11 @@
/* TTB auxiliary descriptor bits */
#define TTBAUX_SACRED 0x00000001 /* sacred entry, do not deallocate */
#define TTBAUX_UNWRITEABLE 0x00000002 /* entry unwriteable */
#define TTBAUX_NOTPAGE 0x00000004 /* entry not mapped in page database */
#define TTBAUX_ALLFLAGS 0x00000007 /* "all flags" mask */
/* Flags that are safe to alter for the TTB auxiliary table. */
#define TTBAUX_SAFEFLAGS (TTBAUX_ALLFLAGS & ~TTBAUX_NOTPAGE)
/* Small page table entry bits */
#define PGTBLSM_XN 0x00000001 /* Execute-Never */
@@ -115,8 +126,12 @@
#define PGTBLSM_APX 0x00000200 /* access permission extended */
#define PGTBLSM_S 0x00000400 /* Shared */
#define PGTBLSM_NG 0x00000800 /* Not Global */
#define PGTBLSM_ALLFLAGS 0x00000FFF /* "all flags" mask */
#define PGTBLSM_PAGE 0xFFFFF000 /* page base address mask */
/* Flags that are safe to alter for a page table entry. */
#define PGTBLSM_SAFEFLAGS (PGTBLSM_ALLFLAGS & ~PGTBLSM_ALWAYS)
/* AP bits for the standard access control model */
#define PGTBLSM_AP00 0x00000000 /* no access */
#define PGTBLSM_AP01 0x00000010 /* supervisor only access */
@@ -133,6 +148,11 @@
/* Page auxiliary descriptor bits */
#define PGAUX_SACRED 0x00000001 /* sacred entry, do not deallocate */
#define PGAUX_UNWRITEABLE 0x00000002 /* entry unwriteable */
#define PGAUX_NOTPAGE 0x00000004 /* entry not mapped in page database */
#define PGAUX_ALLFLAGS 0x00000007 /* "all flags" mask */
/* Flags that are safe to alter for the page auxiliary table. */
#define PGAUX_SAFEFLAGS (PGAUX_ALLFLAGS & ~PGAUX_NOTPAGE)
/* Combinations of flags we use regularly. */
#define TTBFLAGS_LIB_CODE TTBPGTBL_ALWAYS
@@ -152,7 +172,7 @@
#define PGAUXFLAGS_INIT_DATA 0
#define TTBFLAGS_MMIO TTBPGTBL_ALWAYS
#define PGTBLFLAGS_MMIO (PGTBLSM_ALWAYS | PGTBLSM_AP01)
#define PGAUXFLAGS_MMIO PGAUX_SACRED
#define PGAUXFLAGS_MMIO (PGAUX_SACRED | PGAUX_NOTPAGE)
#define TTBAUXFLAGS_PAGETABLE 0
#ifndef __ASM__
@@ -210,7 +230,8 @@ typedef union tagTTB {
typedef struct tagTTBAUXENTRY {
unsigned sacred : 1; /* sacred TTB - should never be deallocated */
unsigned unwriteable : 1; /* entry is not writeable */
unsigned reserved : 30; /* reserved for future allocation */
unsigned notpage : 1; /* entry not mapped in the page database */
unsigned reserved : 29; /* reserved for future allocation */
} TTBAUXENTRY, *PTTBAUXENTRY;
/* TTB auxiliary table entry */
@@ -250,7 +271,8 @@ typedef union tagPGTBL {
typedef struct tagPGAUXENTRY {
unsigned sacred : 1; /* sacred page - should never be deallocated */
unsigned unwriteable : 1; /* entry is not writeable */
unsigned reserved : 30; /* reserved for future allocation */
unsigned notpage : 1; /* entry not mapped in the page database */
unsigned reserved : 29; /* reserved for future allocation */
} PGAUXENTRY, *PPGAUXENTRY;
/* page table auxiliary entry */
@@ -272,17 +294,37 @@ typedef struct tagPAGETAB {
((((ttb) & ((1 << SYS_TTB_BITS) - 1)) << (SYS_PAGE_BITS + SYS_PGTBL_BITS)) | \
(((pgtbl) & ((1 << SYS_PGTBL_BITS) - 1)) << SYS_PAGE_BITS) | ((ofs) & (SYS_PAGE_SIZE - 1)))
/*
/*-----------------------------------------------
* Data structures for the Master Page Database.
*-----------------------------------------------
*/
/* internal structure of a MPDB entry */
typedef struct tagMPDB1 {
PHYSADDR paPTE; /* PA of page table entry for the page */
unsigned next : 20; /* index of "next" entry in list */
unsigned tag : 12; /* page tag */
unsigned sectionmap : 1; /* set if page is part of a section mapping */
unsigned tag : 3; /* page tag */
unsigned subtag : 8; /* page subtag */
} MPDB1;
/* MPDB tags */
#define MPDBTAG_UNKNOWN 0 /* unknown, should never be used */
#define MPDBTAG_NORMAL 1 /* normal user/free page */
#define MPDBTAG_SYSTEM 2 /* system allocation */
/* MPDB system subtags */
#define MPDBSYS_ZEROPAGE 0 /* zero page allocation */
#define MPDBSYS_LIBCODE 1 /* library code */
#define MPDBSYS_KCODE 2 /* kernel code */
#define MPDBSYS_KDATA 3 /* kernel data */
#define MPDBSYS_INIT 4 /* init code & data (to be freed later) */
#define MPDBSYS_TTB 5 /* the system TTB */
#define MPDBSYS_TTBAUX 6 /* the system auxiliary TTB table */
#define MPDBSYS_MPDB 7 /* the MPDB itself */
#define MPDBSYS_PGTBL 8 /* page tables */
#define MPDBSYS_GPU 9 /* GPU reserved pages */
/* The MPDB entry itself. */
typedef union tagMPDB {
UINT64 raw; /* raw data */