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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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3
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4 #include <stdlib.h>
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5 #include "mboot.h"
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6
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nuclear@17
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7 /* page mapping flags */
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8 #define PG_PRESENT (1 << 0)
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nuclear@17
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9 #define PG_WRITABLE (1 << 1)
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nuclear@17
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10 #define PG_USER (1 << 2)
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nuclear@17
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11 #define PG_WRITE_THROUGH (1 << 3)
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nuclear@17
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12 #define PG_NOCACHE (1 << 4)
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nuclear@17
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13 #define PG_ACCESSED (1 << 5)
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nuclear@17
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14 #define PG_DIRTY (1 << 6)
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nuclear@17
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15 #define PG_TYPE (1 << 7)
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nuclear@17
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16 /* PG_GLOBAL mappings won't flush from TLB */
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nuclear@17
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17 #define PG_GLOBAL (1 << 8)
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18
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19
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20 #define PGSIZE 4096
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21 #define PGOFFS_MASK 0xfff
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22 #define PGNUM_MASK 0xfffff000
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nuclear@18
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23 #define PGENT_ADDR_MASK PGNUM_MASK
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nuclear@17
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24
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nuclear@17
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25 #define ADDR_TO_PAGE(x) ((uint32_t)(x) >> 12)
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26 #define PAGE_TO_ADDR(x) ((uint32_t)(x) << 12)
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27
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28 #define ADDR_TO_PGTBL(x) ((uint32_t)(x) >> 22)
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nuclear@17
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29 #define ADDR_TO_PGTBL_PG(x) (((uint32_t)(x) >> 12) & 0x3ff)
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nuclear@17
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30 #define ADDR_TO_PGOFFS(x) ((uint32_t)(x) & PGOFFS_MASK)
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31
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32 #define PAGE_TO_PGTBL(x) ((uint32_t)(x) >> 10)
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nuclear@17
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33 #define PAGE_TO_PGTBL_PG(x) ((uint32_t)(x) & 0x3ff)
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34
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35
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36 void init_vm(struct mboot_info *mb);
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37
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38 void map_page(int vpage, int ppage, unsigned int attr);
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39 void map_page_range(int vpg_start, int pgcount, int ppg_start, unsigned int attr);
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40
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41 void 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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42
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nuclear@18
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43 uint32_t virt_to_phys(uint32_t vaddr);
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nuclear@18
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44
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nuclear@22
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45 enum {
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nuclear@22
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46 MEM_KERNEL,
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47 MEM_USER
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48 };
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nuclear@22
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49
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nuclear@22
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50 int pgalloc(int num, int area);
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nuclear@22
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51
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nuclear@17
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52 #endif /* VM_H_ */
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