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Working on page allocator #67

This commit is contained in:
Adrien Bourmault 2020-01-13 16:12:30 +01:00
parent 08d7de2b40
commit 6a054a4b67
5 changed files with 37 additions and 17 deletions
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2
Makefile
View File

@ -115,7 +115,7 @@ KernSources = kernel/ke/cpuid.c kernel/mm/paging.c \
kernel/sh/shell.c kernel/sh/shcmds.c \
kernel/sh/musage.c kernel/io/ata.c \
kernel/sh/argv.c kernel/ke/pit.c \
kernel/sh/testcmds.c
kernel/sh/testcmds.c kernel/mm/palloc.c
KernObj=$(patsubst %.c,$(KOBJDIR)/%.o,$(KernSources))
KernDep=$(patsubst %.c,$(KOBJDIR)/%.d,$(KernSources))

3
ProjectTree
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@ -98,7 +98,6 @@
│   │   │   ├── ata.c
│   │   │   ├── cursor.c
│   │   │   ├── keyb.c
│   │   │   ├── scan.c
│   │   │   ├── spkr.c
│   │   │   └── vga.c
│   │   ├── ke
@ -160,4 +159,4 @@
├── ProjectTree
└── README.md
28 directories, 107 files
28 directories, 106 files

2
include/mm/paging.h
View File

@ -33,7 +33,7 @@
#define KPAGESIZE (4 * KB)
#define UPAGESIZE (4 * KB)
#define USERSPACE 0x80000000
#define USERSPACE 0x100000000
//----------------------------------------------------------------------------//

22
kaleid/kernel/mm/paging.c
View File

@ -91,7 +91,7 @@ void MmInitPaging(void)
//DebugLog("\tPaging gap : %u MB (%p)\n\tLast virtual address %p\n", diffKernUsr / MB, diffKernUsr, MmVirtLastAddress);
memzero((void *)&MmPageMapLevel4[0], sizeof(MmPageMapLevel4));
phDirSize = ((phRamSize / KPAGESIZE)*sizeof(ulong) + KPAGESIZE) & ( ~(KPAGESIZE - 1));
phDirSize = ((phRamSize / KPAGESIZE)*sizeof(ulong) + KPAGESIZE) & ( ~((KPAGESIZE - 1) | NX));
MmPhysicalPageTable = (ulong*)malloc(phDirSize);
//DebugLog("\t\tRam %u MB, pagesize %u KB, size %u MB\n", phRamSize / MB, KPAGESIZE / KB, phDirSize / MB);
@ -179,7 +179,7 @@ void MmInitPaging(void)
}
// SECTION .RODATA PROTECTION
else if ((ulong)curAddrPT >= (ulong)&_rodata && (ulong)curAddrPT <= (ulong)&_rodata_end) {
MmPT[index] = (ulong)curAddrPT | PRESENT | WRITETHR | NX;
MmPT[index] = (ulong)curAddrPT | PRESENT | NX;
MmPhysicalPageTable[xedni] = (ulong)curAddrPT;
//DebugLog("\tSection .rodata at %p\n", curAddrPT);
}
@ -224,17 +224,17 @@ void MmInitPaging(void)
//
static pte_t *MmGetPageDescriptorFromVirtual(void *virtualAddr)
{
ulong virtAddrPage = (ulong)virtualAddr & ( ~(KPAGESIZE - 1));
ulong virtAddrPage = (ulong)virtualAddr & ( ~((KPAGESIZE - 1) | NX));
if (virtAddrPage > MmVirtLastAddress) {
KeStartPanic("MmSetPage() Out of bound of the address space !");
}
pdpe_t *pdp = (pdpe_t*)((ulong)MmPageMapLevel4[(virtAddrPage / ((ulong)KPAGESIZE * 0x8000000)) % 512] & ~(KPAGESIZE - 1));
pdpe_t *pdp = (pdpe_t*)((ulong)MmPageMapLevel4[(virtAddrPage / ((ulong)KPAGESIZE * 0x8000000)) % 512] & ~((KPAGESIZE - 1) | NX | NX));
//DebugLog("pdp\t: %p\n", pdp);
pde_t *pd = (pde_t*)( (ulong)pdp[(virtAddrPage / ((ulong)KPAGESIZE * 0x40000)) % 512] & ~(KPAGESIZE - 1));
pde_t *pd = (pde_t*)( (ulong)pdp[(virtAddrPage / ((ulong)KPAGESIZE * 0x40000)) % 512] & ~((KPAGESIZE - 1) | NX));
//DebugLog("pd\t: %p\n", pd);
pte_t *pt = (pte_t*)( (ulong)pd[(virtAddrPage / ((ulong)KPAGESIZE * 0x200)) % 512] & ~(KPAGESIZE - 1));
pte_t *pt = (pte_t*)( (ulong)pd[(virtAddrPage / ((ulong)KPAGESIZE * 0x200)) % 512] & ~((KPAGESIZE - 1) | NX));
//DebugLog("pt\t: %p\n", pt);
pte_t *page = &pt[(virtAddrPage / ((ulong)KPAGESIZE)) % 512];
@ -249,19 +249,19 @@ static pte_t *MmGetPageDescriptorFromVirtual(void *virtualAddr)
//
void *MmTransVirtToPhyAddr(void* virtualAddr)
{
ulong virtAddrPage = (ulong)virtualAddr & ( ~(KPAGESIZE - 1));
ulong virtAddrPage = (ulong)virtualAddr & ( ~((KPAGESIZE - 1) | NX));
pte_t *page = MmGetPageDescriptorFromVirtual(virtualAddr);
if (*page == (*page & ~(KPAGESIZE - 1))) {
if (*page == (*page & ~((KPAGESIZE - 1) | NX))) {
return NULL;
}
return (void*)((*page & ~(KPAGESIZE - 1))+ ((ulong)virtualAddr - (ulong)virtAddrPage));
return (void*)((*page & ~((KPAGESIZE - 1) | NX))+ ((ulong)virtualAddr - (ulong)virtAddrPage));
}
void *MmTransPhyToVirtAddr(void* physicalAddr)
{
ulong phyAddrPage = (ulong)physicalAddr & ( ~(KPAGESIZE - 1));
ulong phyAddrPage = (ulong)physicalAddr & ( ~((KPAGESIZE - 1) | NX));
return (void*)( MmPhysicalPageTable[(ulong)physicalAddr
/ ((ulong)KPAGESIZE)
] + ((ulong)physicalAddr - phyAddrPage));
@ -298,7 +298,7 @@ void MmMapPage(void* virtualAddr, void* physicalAddr, ulong flags)
{
pte_t *page = MmGetPageDescriptorFromVirtual(virtualAddr);
*page = ((ulong)physicalAddr & ~(KPAGESIZE - 1)) | flags;
*page = ((ulong)physicalAddr & ~((KPAGESIZE - 1) | NX)) | flags;
KeFlushTlbSingle(*page);
}

25
kaleid/kernel/mm/palloc.c
View File

@ -31,8 +31,29 @@
//---------
enum
{
Whatever = 1UL << 52,
Whatever2 = 1UL << 62
};
typedef struct {
void **FramePtr;
int pageNumber;
} FramePtr_t;
//---------
//
// Returns a structure that describes a pageframe
//
/* FramePtr_t MmAllocPageBlock(size_t size) { */
/* ulong pageNumber = (ulong)size / KPAGESIZE; */
/* return (FramePtr_t)0; */
/* } */