void *mkPageDir()
{
void *ret = 0;
uint32_t KernelPageTable = (0xC0000000 / 0x400000);
uint32_t KernelVirtPageTableAddr = (0xF0001000 + (0x1000 * KernelPageTable));
Paging_p NewDIR = (Paging_p)_VMM_malloc(0xC0000000, 1, FALSE, TRUE);
memset(NewDIR, 0, 0x1000);
NewDIR->entry[0x300] = ((uint32_t) getPhysical(KernelVirtPageTableAddr) | 3);
NewDIR->entry[0] = ((uint32_t) getPhysical(0xF0001000) | 3);
Paging_p NewDirEntList = (Paging_p) _VMM_malloc(0xC0001000, 1, FALSE, TRUE);
memset(NewDirEntList, 0, 0x1000);
NewDIR->entry[0x3C0] = ((uint32_t) getPhysical(0xC0001000) | 3);
NewDirEntList->entry[0] = ((uint32_t) getPhysical(0xC0000000) | 3);
NewDirEntList->entry[1] = ((uint32_t) getPhysical(0xF0001000) | 3);
NewDirEntList->entry[0x301] = ((uint32_t) getPhysical(KernelVirtPageTableAddr) | 3);
NewDirEntList->entry[0x3C1] = ((uint32_t) getPhysical(0xC0001000) | 3);
ret = getPhysical(0xC0000000);
_VMM_unmap(0xC0000000);
_VMM_unmap(0xC0001000);
return ret;
/* uint32_t PhysEntry = Physical & 0xFFFFF000;
PhysEntry |= 3;
uint32_t PageTable = (Virtual / 0x400000);
uint32_t PageVirtAddress = (0xF0001000 + (0x1000 * PageTable));
uint32_t PageTableEnt = ((Virtual % 0x400000) / 0x1000);*/
}
void _VMM_free(uint32_t Virtual, uint32_t Pages)
{
uint32_t PhysBase = (uint32_t)getPhysical(Virtual);
if(PhysBase) {
uint32_t PhysPages = Pages;
for(Pages++; Pages > 0; Pages--, Virtual+=0x1000)
_VMM_unmap(Virtual);
_PMM_free(PhysBase, PhysPages);
}
}
int main(int argc, char *argv[]) {
// Sample page table.
pagetable pt[] = {
{ 4, 1 }, // { frame, valid }
{ 2, 1 },
{ 9, 1 },
{ 10, 1 },
{ 0, 1 },
{ 14, 1 },
{ 12, 0 },
{ 6, 1 },
{ 1, 1 },
{ 3, 0 },
{ 13, 1 },
{ 8, 1 },
{ 7, 1 },
{ 11, 1 },
{ 15, 1 },
{ 5, 0 } // Should be PAGECOUNT members.
};
setPageTable(pt);
// Tests...feel free to add more!
assert(getPhysical(-1) == ERR_OUT_OF_RANGE);
assert(getPhysical(5) == 69);
assert(getPhysical(13) == 77);
assert(getPhysical(24) == 40);
assert(getPhysical(31) == 47);
assert(getPhysical(52) == 164);
assert(getPhysical(72) == 8);
assert(getPhysical(90) == 234);
assert(getPhysical(98) == ERR_INVALID);
assert(getPhysical(104) == ERR_INVALID);
assert(getPhysical(128) == 16);
assert(getPhysical(150) == ERR_INVALID);
assert(getPhysical(179) == 131);
assert(getPhysical(181) == 133);
assert(getPhysical(199) == 119);
assert(getPhysical(218) == 186);
assert(getPhysical(239) == 255);
assert(getPhysical(240) == ERR_INVALID);
assert(getPhysical(249) == ERR_INVALID);
assert(getPhysical(256) == ERR_OUT_OF_RANGE);
}
