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Get paging ready for userspace

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This commit is contained in:
Adrien Bourmault 2021-03-01 17:18:10 +01:00
parent 2a1990e043
commit 5978e70303
Signed by: neox
GPG Key ID: 6EB408FE0ACEC664
1 changed files with 5 additions and 5 deletions
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10
kaleid/kernel/mm/paging.c
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@ -226,9 +226,9 @@ void MmInitPaging(void)
} }
// //
// Get a page from an address // Create a page and its parent directories from a virtual (effective) address
// //
ulong *MmGetPageDescriptorFromVirtual(void *virtualAddr) static ulong *MmGetPageDescriptorFromVirtual(void *virtualAddr)
{ {
// Select bit from 39 to 47 // Select bit from 39 to 47
register ulong pml4Index = ((ulong)virtualAddr & 0xFF8000000000) >> 39; register ulong pml4Index = ((ulong)virtualAddr & 0xFF8000000000) >> 39;
@ -257,7 +257,7 @@ ulong *MmGetPageDescriptorFromVirtual(void *virtualAddr)
(pml4_t)((ulong)MmPageMapLevel4[pml4Index] (pml4_t)((ulong)MmPageMapLevel4[pml4Index]
| PRESENT | PRESENT
| READWRITE | READWRITE
| USERMODE * (virtualAddr >= USERSPACE) ); | USERMODE * (virtualAddr >= (void*)USERSPACE) );
pdp = (pdpe_t *)((ulong)MmPageMapLevel4[pml4Index] & 0xFFFFFFFFFF000); pdp = (pdpe_t *)((ulong)MmPageMapLevel4[pml4Index] & 0xFFFFFFFFFF000);
//DebugLog("\tCreate PDP at %p\n", MmPageMapLevel4[pml4Index]); //DebugLog("\tCreate PDP at %p\n", MmPageMapLevel4[pml4Index]);
@ -276,7 +276,7 @@ ulong *MmGetPageDescriptorFromVirtual(void *virtualAddr)
pdp[pdpIndex] = (pdpe_t)((ulong)pdp[pdpIndex] pdp[pdpIndex] = (pdpe_t)((ulong)pdp[pdpIndex]
| PRESENT | PRESENT
| READWRITE | READWRITE
| USERMODE * (virtualAddr >= USERSPACE) ); | USERMODE * (virtualAddr >= (void*)USERSPACE) );
pd = (pde_t *)((ulong)pdp[pdpIndex] & 0xFFFFFFFFFF000); pd = (pde_t *)((ulong)pdp[pdpIndex] & 0xFFFFFFFFFF000);
//DebugLog("\tCreate PD at %p\n", (ulong)pdp[pdpIndex]); //DebugLog("\tCreate PD at %p\n", (ulong)pdp[pdpIndex]);
@ -295,7 +295,7 @@ ulong *MmGetPageDescriptorFromVirtual(void *virtualAddr)
pd[pdIndex] = (pde_t)((ulong)pd[pdIndex] pd[pdIndex] = (pde_t)((ulong)pd[pdIndex]
| PRESENT | PRESENT
| READWRITE | READWRITE
| USERMODE * (virtualAddr >= USERSPACE) ); | USERMODE * (virtualAddr >= (void*)USERSPACE) );
pt = (pte_t *)((ulong)pd[pdIndex] & 0xFFFFFFFFFF000); pt = (pte_t *)((ulong)pd[pdIndex] & 0xFFFFFFFFFF000);
//DebugLog("\tCreate PT at %p\n", (ulong)pd[pdIndex]); //DebugLog("\tCreate PT at %p\n", (ulong)pd[pdIndex]);