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nuclear@17
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1 #ifndef VM_H_
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nuclear@17
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2 #define VM_H_
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nuclear@17
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3
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nuclear@17
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4 #include <stdlib.h>
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nuclear@17
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5 #include "mboot.h"
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nuclear@17
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6
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nuclear@47
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7 #define KMEM_START 0xc0000000
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nuclear@47
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8
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nuclear@17
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9 /* page mapping flags */
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nuclear@17
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10 #define PG_PRESENT (1 << 0)
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nuclear@17
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11 #define PG_WRITABLE (1 << 1)
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nuclear@17
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12 #define PG_USER (1 << 2)
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nuclear@17
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13 #define PG_WRITE_THROUGH (1 << 3)
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nuclear@17
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14 #define PG_NOCACHE (1 << 4)
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nuclear@17
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15 #define PG_ACCESSED (1 << 5)
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nuclear@17
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16 #define PG_DIRTY (1 << 6)
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nuclear@17
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17 #define PG_TYPE (1 << 7)
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nuclear@17
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18 /* PG_GLOBAL mappings won't flush from TLB */
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nuclear@17
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19 #define PG_GLOBAL (1 << 8)
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nuclear@17
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20
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nuclear@17
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21
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nuclear@17
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22 #define PGSIZE 4096
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nuclear@23
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23 #define PAGE_COUNT (1024 * 1024)
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nuclear@23
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24
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nuclear@17
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25 #define PGOFFS_MASK 0xfff
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nuclear@17
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26 #define PGNUM_MASK 0xfffff000
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nuclear@18
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27 #define PGENT_ADDR_MASK PGNUM_MASK
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nuclear@17
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28
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nuclear@23
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29 #define ADDR_TO_PAGE(x) ((uint32_t)(x) >> 12)
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nuclear@23
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30 #define PAGE_TO_ADDR(x) ((uint32_t)(x) << 12)
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nuclear@17
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31
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nuclear@17
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32 #define ADDR_TO_PGTBL(x) ((uint32_t)(x) >> 22)
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nuclear@17
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33 #define ADDR_TO_PGTBL_PG(x) (((uint32_t)(x) >> 12) & 0x3ff)
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nuclear@17
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34 #define ADDR_TO_PGOFFS(x) ((uint32_t)(x) & PGOFFS_MASK)
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nuclear@17
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35
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nuclear@17
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36 #define PAGE_TO_PGTBL(x) ((uint32_t)(x) >> 10)
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nuclear@17
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37 #define PAGE_TO_PGTBL_PG(x) ((uint32_t)(x) & 0x3ff)
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nuclear@17
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38
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nuclear@57
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39 /* argument to clone_vm */
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nuclear@57
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40 #define CLONE_SHARED 0
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nuclear@57
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41 #define CLONE_COW 1
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nuclear@57
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42
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nuclear@57
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43 /* last argument to *_page_bit */
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nuclear@57
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44 #define PAGE_ONLY 0
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nuclear@57
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45 #define WHOLE_PATH 1
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nuclear@17
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46
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nuclear@26
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47 void init_vm(void);
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nuclear@17
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48
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nuclear@23
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49 int map_page(int vpage, int ppage, unsigned int attr);
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nuclear@43
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50 int unmap_page(int vpage);
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nuclear@23
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51 int map_page_range(int vpg_start, int pgcount, int ppg_start, unsigned int attr);
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nuclear@43
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52 int unmap_page_range(int vpg_start, int pgcount);
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nuclear@23
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53 int map_mem_range(uint32_t vaddr, size_t sz, uint32_t paddr, unsigned int attr);
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nuclear@17
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54
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nuclear@43
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55 int virt_to_phys_page(int vpg);
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nuclear@18
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56 uint32_t virt_to_phys(uint32_t vaddr);
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nuclear@18
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57
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nuclear@22
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58 enum {
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nuclear@22
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59 MEM_KERNEL,
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nuclear@22
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60 MEM_USER
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nuclear@22
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61 };
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nuclear@22
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62
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nuclear@22
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63 int pgalloc(int num, int area);
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nuclear@47
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64 int pgalloc_vrange(int start, int num);
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nuclear@23
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65 void pgfree(int start, int num);
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nuclear@23
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66
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nuclear@57
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67 uint32_t clone_vm(int cow);
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nuclear@57
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68
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nuclear@57
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69 int get_page_bit(int pgnum, uint32_t bit, int wholepath);
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nuclear@57
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70 void set_page_bit(int pgnum, uint32_t bit, int wholepath);
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nuclear@57
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71 void clear_page_bit(int pgnum, uint32_t bit, int wholepath);
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nuclear@43
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72
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nuclear@23
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73 void dbg_print_vm(int area);
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nuclear@22
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74
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nuclear@47
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75 /* defined in vm-asm.S */
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nuclear@47
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76 void set_pgdir_addr(uint32_t addr);
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nuclear@55
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77 uint32_t get_pgdir_addr(void);
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nuclear@47
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78
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nuclear@17
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79 #endif /* VM_H_ */
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