os-k-team/os-k
os-k-team
/
os-k
2
0
Fork 0
Code Issues 1 Pull Requests Packages Projects Releases Wiki Activity

Working static paging

This commit is contained in:
Adrien Bourmault 2019-05-15 11:15:21 +02:00
parent b3240ec324
commit aaf25bd7e9
1 changed files with 16 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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

@ -25,30 +25,40 @@ enum
MF_WRITETHR = 1 << 3, MF_WRITETHR = 1 << 3,
MF_CACHEDIS = 1 << 4, MF_CACHEDIS = 1 << 4,
MF_ACCESSED = 1 << 5, MF_ACCESSED = 1 << 5,
MF_DIRTY = 1 << 6 MF_DIRTY = 1 << 6,
MF_HUGE = 1 << 7
}; };
#define RAM 8 #define RAM 8
#define NB_4K 2
//----------- //-----------
volatile pdpe_t PML4[512] __attribute__((__aligned__(4096))); volatile pdpe_t PML4[512] __attribute__((__aligned__(4096)));
// First PDPE of our pml4
volatile pde_t PDP[512] __attribute__((__aligned__(4096))); volatile pde_t PDP[512] __attribute__((__aligned__(4096)));
// First PDP of first_pdpe volatile pde_t PD[512 * RAM] __attribute__((__aligned__(4096)));
volatile pte_t PD[512 * RAM] __attribute__((__aligned__(4096)));
volatile pte_t PT[512 * NB_4K] __attribute__((__aligned__(4096)));
void MmInitPaging(void) void MmInitPaging(void)
{ {
memzero((void *)&PML4[0], sizeof(PML4)); memzero((void *)&PML4[0], sizeof(PML4));
memzero((void *)&PDP[0], sizeof(PDP)); memzero((void *)&PDP[0], sizeof(PDP));
memzero((void *)&PD[0], sizeof(PD)); memzero((void *)&PD[0], sizeof(PD));
memzero((void *)&PT[0], sizeof(PT));
for (int i = 0; i < 512 * RAM; i++) { for (int i = 0; i < 512 * NB_4K; i++) {
PD[i] = ((ulong)i * 2048 * 1024) | MF_PRESENT | MF_READWRITE | 1 << 7; PT[i] = ((ulong)i * 4096) | MF_PRESENT | MF_READWRITE;
}
for (int i = 0; i < NB_4K; i++) {
PD[i] = (ulong)(&PT[i*512])| MF_PRESENT | MF_READWRITE;
}
for (int i = NB_4K; i < 512 * RAM; i++) {
PD[i] = ((ulong)i * 2048 * 1024) | MF_PRESENT | MF_READWRITE | MF_HUGE;
} }
for (int i = 0; i < RAM; i++) { for (int i = 0; i < RAM; i++) {