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Working on allocator

This commit is contained in:
Adrien Bourmault 2020-01-18 13:40:56 +01:00
parent ded1e99fb9
commit 77f4895d48
1 changed files with 19 additions and 19 deletions
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38
kaleid/kernel/mm/paging.c
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@ -31,6 +31,7 @@
#include <mm/map.h> #include <mm/map.h>
#include <lib/buf.h> #include <lib/buf.h>
#include <io/vga.h> #include <io/vga.h>
#include <ke/time.h>
//----------- //-----------
@ -220,7 +221,7 @@ void MmInitPaging(void)
// //
// Get a page from an address // Get a page from an address
// //
static pte_t *MmGetPageDescriptorFromVirtual(void *virtualAddr) static ulong *MmGetPageDescriptorFromVirtual(void *virtualAddr) //XXX MUST CREATE NEW ENTRIES IN TREE
{ {
ulong virtAddrPage = (ulong)virtualAddr & ( ~((KPAGESIZE - 1) | NX)); ulong virtAddrPage = (ulong)virtualAddr & ( ~((KPAGESIZE - 1) | NX));
@ -228,27 +229,29 @@ static pte_t *MmGetPageDescriptorFromVirtual(void *virtualAddr)
KeStartPanic("MmSetPage() Out of bound of the address space !"); KeStartPanic("MmSetPage() Out of bound of the address space !");
} }
pdpe_t *pdp = (pdpe_t*)((ulong)MmPageMapLevel4[(virtAddrPage / ((ulong)KPAGESIZE * 0x8000000)) % 512] & ~((KPAGESIZE - 1) | NX | NX)); pdpe_t *pdp = (pdpe_t*)((ulong)MmPageMapLevel4[(virtAddrPage / ((ulong)KPAGESIZE * 0x8000000)) % 512]);
//DebugLog("pdp\t: %p\n", pdp); DebugLog("pdp\t: %p\n", pdp);
pde_t *pd = (pde_t*)( (ulong)pdp[(virtAddrPage / ((ulong)KPAGESIZE * 0x40000)) % 512] & ~((KPAGESIZE - 1) | NX)); pde_t *pd = (pde_t*)( (ulong)pdp[(virtAddrPage / ((ulong)KPAGESIZE * 0x40000)) % 512] );
//DebugLog("pd\t: %p\n", pd); DebugLog("pd\t: %p\n", pd);
pte_t *pt = (pte_t*)( (ulong)pd[(virtAddrPage / ((ulong)KPAGESIZE * 0x200)) % 512] & ~((KPAGESIZE - 1) | NX)); pte_t *pt = (pte_t*)( (ulong)pd[(virtAddrPage / ((ulong)KPAGESIZE * 0x200)) % 512] );
//DebugLog("pt\t: %p\n", pt); DebugLog("pt\t: %p\n", pt);
pte_t *page = &pt[(virtAddrPage / ((ulong)KPAGESIZE)) % 512]; ulong index = ((ulong)virtualAddr / ((ulong)KPAGESIZE)) % 512;
//DebugLog("page (with flags): %p\n", page);
ulong *page = &(pt[index]);
DebugLog("page (with flags): %p\n", page);
KeSleep(6000);
return page; return page;
} }
// //
// Translates a virtual address to its physical equivalent // Translates a virtual address to its physical equivalent
// //
void *MmTransVirtToPhyAddr(void* virtualAddr) void *MmTransVirtToPhyAddr(void* virtualAddr)
{ {
ulong virtAddrPage = (ulong)virtualAddr & ( ~((KPAGESIZE - 1) | NX)); ulong virtAddrPage = (ulong)virtualAddr & ( ~((KPAGESIZE - 1) | NX));
pte_t *page = MmGetPageDescriptorFromVirtual(virtualAddr); ulong *page = MmGetPageDescriptorFromVirtual(virtualAddr);
if (*page == (*page & ~((KPAGESIZE - 1) | NX))) { if (*page == (*page & ~((KPAGESIZE - 1) | NX))) {
return NULL; return NULL;
@ -270,7 +273,7 @@ void *MmTransPhyToVirtAddr(void* physicalAddr)
// //
void MmSetPage(void* virtualAddr, ulong flags) void MmSetPage(void* virtualAddr, ulong flags)
{ {
pte_t *page = MmGetPageDescriptorFromVirtual(virtualAddr); ulong *page = MmGetPageDescriptorFromVirtual(virtualAddr);
*page |= flags; *page |= flags;
@ -282,7 +285,7 @@ void MmSetPage(void* virtualAddr, ulong flags)
// //
void MmUnsetPage(void* virtualAddr, ulong flags) void MmUnsetPage(void* virtualAddr, ulong flags)
{ {
pte_t *page = MmGetPageDescriptorFromVirtual(virtualAddr); ulong *page = MmGetPageDescriptorFromVirtual(virtualAddr);
*page &= (~flags); *page &= (~flags);
@ -294,14 +297,11 @@ void MmUnsetPage(void* virtualAddr, ulong flags)
// //
void MmMapPage(void* virtualAddr, void* physicalAddr, ulong flags) void MmMapPage(void* virtualAddr, void* physicalAddr, ulong flags)
{ {
pte_t *page = MmGetPageDescriptorFromVirtual(virtualAddr); ulong *page = MmGetPageDescriptorFromVirtual(virtualAddr);
DebugLog("Request %p:%p with %lu\n", virtualAddr, physicalAddr, flags); DebugLog("Request %p:%p with %lu\n", virtualAddr, physicalAddr, flags);
DebugLog("Page (at %p) %p : was %p\n", &page, page, *page);
*page = (ulong)physicalAddr | flags; page[0] = (ulong)physicalAddr | flags;
DebugLog("Page (at %p) %p : is %p\n", &page, page, *page);
MmPhysicalPageTable[(ulong)physicalAddr MmPhysicalPageTable[(ulong)physicalAddr
/ ((ulong)KPAGESIZE) / ((ulong)KPAGESIZE)
@ -318,7 +318,7 @@ void MmMapPage(void* virtualAddr, void* physicalAddr, ulong flags)
// //
void MmUnmapPage(void* virtualAddr) void MmUnmapPage(void* virtualAddr)
{ {
pte_t *page = MmGetPageDescriptorFromVirtual(virtualAddr); ulong *page = MmGetPageDescriptorFromVirtual(virtualAddr);
MmPhysicalPageTable[(ulong)(MmTransVirtToPhyAddr(virtualAddr)) MmPhysicalPageTable[(ulong)(MmTransVirtToPhyAddr(virtualAddr))
/ ((ulong)KPAGESIZE) / ((ulong)KPAGESIZE)