| 38,23 → 38,105 |
|---|
| #include <mm/as.h> |
| #include <config.h> |
| #include <arch/boot/boot.h> |
| #include <arch/hypercall.h> |
| #include <panic.h> |
| #include <debug.h> |
| #include <align.h> |
| #include <macros.h> |
| |
| #include <print.h> |
| #include <console/cmd.h> |
| #include <console/kconsole.h> |
| |
| uintptr_t last_frame = 0; |
| |
| #define L1_PT_SHIFT 10 |
| #define L2_PT_SHIFT 0 |
| |
| #define L1_OFFSET_MASK 0x3ff |
| #define L2_OFFSET_MASK 0x3ff |
| |
| #define PFN2PTL1_OFFSET(pfn) ((pfn >> L1_PT_SHIFT) & L1_OFFSET_MASK) |
| #define PFN2PTL2_OFFSET(pfn) ((pfn >> L2_PT_SHIFT) & L2_OFFSET_MASK) |
| |
| #define PAGE_MASK (~(PAGE_SIZE - 1)) |
| |
| #define PTE2ADDR(pte) (pte & PAGE_MASK) |
| |
| #define _PAGE_PRESENT 0x001UL |
| #define _PAGE_RW 0x002UL |
| #define _PAGE_USER 0x004UL |
| #define _PAGE_PWT 0x008UL |
| #define _PAGE_PCD 0x010UL |
| #define _PAGE_ACCESSED 0x020UL |
| #define _PAGE_DIRTY 0x040UL |
| #define _PAGE_PAT 0x080UL |
| #define _PAGE_PSE 0x080UL |
| #define _PAGE_GLOBAL 0x100UL |
| |
| #define L1_PROT (_PAGE_PRESENT | _PAGE_ACCESSED) |
| #define L2_PROT (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED) |
| |
| void frame_arch_init(void) |
| { |
| if (config.cpu_active == 1) { |
| /* The only memory zone starts just after page table */ |
| pfn_t start = ADDR2PFN(ALIGN_UP(KA2PA(start_info.pt_base), PAGE_SIZE)) + start_info.nr_pt_frames; |
| size_t size = start_info.nr_pages - start; |
| |
| /* Create identity mapping */ |
| pfn_t phys; |
| for (phys = start; phys < start + size; phys++) { |
| mmu_update_t updates[1]; |
| pfn_t virt = ADDR2PFN(PA2KA(PFN2ADDR(phys))); |
| |
| size_t ptl1_offset = PFN2PTL1_OFFSET(virt); |
| size_t ptl2_offset = PFN2PTL2_OFFSET(virt); |
| |
| unsigned long *ptl2_base = (unsigned long *) PTE2ADDR(start_info.pt_base[ptl1_offset]); |
| |
| if (ptl2_base == 0) { |
| mmuext_op_t mmu_ext; |
| |
| pfn_t virt2 = ADDR2PFN(PA2KA(PFN2ADDR(start))); |
| |
| /* New L1 page table entry needed */ |
| memsetb(PFN2ADDR(virt2), PAGE_SIZE, 0); |
| |
| size_t ptl1_offset2 = PFN2PTL1_OFFSET(virt2); |
| size_t ptl2_offset2 = PFN2PTL2_OFFSET(virt2); |
| unsigned long *ptl2_base2 = (unsigned long *) PTE2ADDR(start_info.pt_base[ptl1_offset2]); |
| |
| if (ptl2_base2 == 0) |
| panic("Unable to find page table reference"); |
| |
| updates[0].ptr = (uintptr_t) &ptl2_base2[ptl2_offset2]; |
| updates[0].val = PFN2ADDR(start_info.mfn_list[start]) | L1_PROT; |
| if (xen_mmu_update(updates, 1, NULL, DOMID_SELF) < 0) |
| panic("Unable to map new page table"); |
| |
| mmu_ext.cmd = MMUEXT_PIN_L1_TABLE; |
| mmu_ext.arg1.mfn = start_info.mfn_list[start]; |
| if (xen_mmuext_op(&mmu_ext, 1, NULL, DOMID_SELF) < 0) |
| panic("Error pinning new page table"); |
| |
| unsigned long *ptl0 = (unsigned long *) PFN2ADDR(start_info.mfn_list[ADDR2PFN(KA2PA(start_info.pt_base))]); |
| |
| updates[0].ptr = (uintptr_t) &ptl0[ptl1_offset]; |
| updates[0].val = PFN2ADDR(start_info.mfn_list[start]) | L2_PROT; |
| if (xen_mmu_update(updates, 1, NULL, DOMID_SELF) < 0) |
| panic("Unable to update PTE for page table"); |
| |
| ptl2_base = (unsigned long *) PTE2ADDR(start_info.pt_base[ptl1_offset]); |
| start++; |
| size--; |
| } |
| |
| updates[0].ptr = (uintptr_t) &ptl2_base[ptl2_offset]; |
| updates[0].val = PFN2ADDR(start_info.mfn_list[phys]) | L2_PROT; |
| if (xen_mmu_update(updates, 1, NULL, DOMID_SELF) < 0) |
| panic("Unable to update PTE"); |
| } |
| |
| zone_create(start, size, start, 0); |
| last_frame = start + size; |
| } |