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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
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22
kaleid/kernel/mm/paging.c
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@ -25,30 +25,40 @@ enum
MF_WRITETHR = 1 << 3,
MF_CACHEDIS = 1 << 4,
MF_ACCESSED = 1 << 5,
MF_DIRTY = 1 << 6
MF_DIRTY = 1 << 6,
MF_HUGE = 1 << 7
};
#define RAM 8
#define NB_4K 2
//-----------
volatile pdpe_t PML4[512] __attribute__((__aligned__(4096)));
// First PDPE of our pml4
volatile pde_t PDP[512] __attribute__((__aligned__(4096)));
// First PDP of first_pdpe
volatile pte_t PD[512 * RAM] __attribute__((__aligned__(4096)));
volatile pde_t PD[512 * RAM] __attribute__((__aligned__(4096)));
volatile pte_t PT[512 * NB_4K] __attribute__((__aligned__(4096)));
void MmInitPaging(void)
{
memzero((void *)&PML4[0], sizeof(PML4));
memzero((void *)&PDP[0], sizeof(PDP));
memzero((void *)&PD[0], sizeof(PD));
memzero((void *)&PT[0], sizeof(PT));
for (int i = 0; i < 512 * RAM; i++) {
PD[i] = ((ulong)i * 2048 * 1024) | MF_PRESENT | MF_READWRITE | 1 << 7;
for (int i = 0; i < 512 * NB_4K; i++) {
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++) {