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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
27 | */ |
| 28 | 28 | ||
| 29 | #include <mm/page.h> |
29 | #include <mm/page.h> |
| - | 30 | #include <mm/frame.h> |
|
| 30 | #include <arch/mm/page.h> |
31 | #include <arch/mm/page.h> |
| 31 | #include <arch/types.h> |
32 | #include <arch/types.h> |
| 32 | #include <typedefs.h> |
33 | #include <typedefs.h> |
| - | 34 | #include <arch/asm.h> |
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| 33 | 35 | ||
| 34 | void page_init(void) |
36 | void page_init(void) |
| 35 | { |
37 | { |
| 36 | page_arch_init(); |
38 | page_arch_init(); |
| 37 | map_page_to_frame(0x0, 0x0, PAGE_NOT_PRESENT, 0); |
39 | map_page_to_frame(0x0, 0x0, PAGE_NOT_PRESENT, 0); |
| Line 56... | Line 58... | ||
| 56 | 58 | ||
| 57 | for (i = 0; i < cnt; i++) |
59 | for (i = 0; i < cnt; i++) |
| 58 | map_page_to_frame(s + i*PAGE_SIZE, s + i*PAGE_SIZE, PAGE_NOT_CACHEABLE, 0); |
60 | map_page_to_frame(s + i*PAGE_SIZE, s + i*PAGE_SIZE, PAGE_NOT_CACHEABLE, 0); |
| 59 | 61 | ||
| 60 | } |
62 | } |
| - | 63 | ||
| - | 64 | /** Map page to frame |
|
| - | 65 | * |
|
| - | 66 | * Map virtual address 'page' to physical address 'frame' |
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| - | 67 | * using 'flags'. Allocate and setup any missing page tables. |
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| - | 68 | * |
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| - | 69 | * @param page Virtual address of the page to be mapped. |
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| - | 70 | * @param frame Physical address of memory frame to which the mapping is done. |
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| - | 71 | * @param flags Flags to be used for mapping. |
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| - | 72 | * @param root Explicit PTL0 address. |
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| - | 73 | */ |
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| - | 74 | void map_page_to_frame(__address page, __address frame, int flags, __address root) |
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| - | 75 | { |
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| - | 76 | pte_t *ptl0, *ptl1, *ptl2, *ptl3; |
|
| - | 77 | __address newpt; |
|
| - | 78 | ||
| - | 79 | ptl0 = (pte_t *) PA2KA(root ? root : (__address) GET_PTL0_ADDRESS()); |
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| - | 80 | ||
| - | 81 | if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT) { |
|
| - | 82 | newpt = frame_alloc(FRAME_KA); |
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| - | 83 | memsetb(newpt, PAGE_SIZE, 0); |
|
| - | 84 | SET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page), KA2PA(newpt)); |
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| - | 85 | SET_PTL1_FLAGS(ptl0, PTL0_INDEX(page), PAGE_PRESENT | PAGE_USER); |
|
| - | 86 | } |
|
| - | 87 | ||
| - | 88 | ptl1 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page))); |
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| - | 89 | ||
| - | 90 | if (GET_PTL2_FLAGS(ptl1, PTL1_INDEX(page)) & PAGE_NOT_PRESENT) { |
|
| - | 91 | newpt = frame_alloc(FRAME_KA); |
|
| - | 92 | memsetb(newpt, PAGE_SIZE, 0); |
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| - | 93 | SET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page), KA2PA(newpt)); |
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| - | 94 | SET_PTL2_FLAGS(ptl1, PTL1_INDEX(page), PAGE_PRESENT | PAGE_USER); |
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| - | 95 | } |
|
| - | 96 | ||
| - | 97 | ptl2 = (pte_t *) PA2KA(GET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page))); |
|
| - | 98 | ||
| - | 99 | if (GET_PTL3_FLAGS(ptl2, PTL2_INDEX(page)) & PAGE_NOT_PRESENT) { |
|
| - | 100 | newpt = frame_alloc(FRAME_KA); |
|
| - | 101 | memsetb(newpt, PAGE_SIZE, 0); |
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| - | 102 | SET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page), KA2PA(newpt)); |
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| - | 103 | SET_PTL3_FLAGS(ptl2, PTL2_INDEX(page), PAGE_PRESENT | PAGE_USER); |
|
| - | 104 | } |
|
| - | 105 | ||
| - | 106 | ptl3 = (pte_t *) PA2KA(GET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page))); |
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| - | 107 | ||
| - | 108 | SET_FRAME_ADDRESS(ptl3, PTL3_INDEX(page), frame); |
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| - | 109 | SET_FRAME_FLAGS(ptl3, PTL3_INDEX(page), flags); |
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| - | 110 | } |
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