33,7 → 33,11 |
#include <typedefs.h> |
#include <arch/asm.h> |
#include <memstr.h> |
#include <debug.h> |
|
/** Virtual operations for page subsystem. */ |
page_operations_t *page_operations = NULL; |
|
void page_init(void) |
{ |
page_arch_init(); |
73,42 → 77,12 |
*/ |
void page_mapping_insert(__address page, __address frame, int flags, __address root) |
{ |
pte_t *ptl0, *ptl1, *ptl2, *ptl3; |
__address newpt; |
ASSERT(page_operations); |
ASSERT(page_operations->mapping_insert); |
|
ptl0 = (pte_t *) PA2KA(root ? root : (__address) GET_PTL0_ADDRESS()); |
|
if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT) { |
newpt = frame_alloc(FRAME_KA, ONE_FRAME); |
memsetb(newpt, PAGE_SIZE, 0); |
SET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page), KA2PA(newpt)); |
SET_PTL1_FLAGS(ptl0, PTL0_INDEX(page), PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | PAGE_WRITE); |
page_operations->mapping_insert(page, frame, flags, root); |
} |
|
ptl1 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page))); |
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if (GET_PTL2_FLAGS(ptl1, PTL1_INDEX(page)) & PAGE_NOT_PRESENT) { |
newpt = frame_alloc(FRAME_KA, ONE_FRAME); |
memsetb(newpt, PAGE_SIZE, 0); |
SET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page), KA2PA(newpt)); |
SET_PTL2_FLAGS(ptl1, PTL1_INDEX(page), PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | PAGE_WRITE); |
} |
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ptl2 = (pte_t *) PA2KA(GET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page))); |
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if (GET_PTL3_FLAGS(ptl2, PTL2_INDEX(page)) & PAGE_NOT_PRESENT) { |
newpt = frame_alloc(FRAME_KA, ONE_FRAME); |
memsetb(newpt, PAGE_SIZE, 0); |
SET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page), KA2PA(newpt)); |
SET_PTL3_FLAGS(ptl2, PTL2_INDEX(page), PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | PAGE_WRITE); |
} |
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ptl3 = (pte_t *) PA2KA(GET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page))); |
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SET_FRAME_ADDRESS(ptl3, PTL3_INDEX(page), frame); |
SET_FRAME_FLAGS(ptl3, PTL3_INDEX(page), flags); |
} |
|
/** Find mapping for virtual page |
* |
* Find mapping for virtual page. |
120,24 → 94,8 |
*/ |
pte_t *page_mapping_find(__address page, __address root) |
{ |
pte_t *ptl0, *ptl1, *ptl2, *ptl3; |
ASSERT(page_operations); |
ASSERT(page_operations->mapping_find); |
|
ptl0 = (pte_t *) PA2KA(root ? root : (__address) GET_PTL0_ADDRESS()); |
|
if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT) |
return NULL; |
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ptl1 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page))); |
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if (GET_PTL2_FLAGS(ptl1, PTL1_INDEX(page)) & PAGE_NOT_PRESENT) |
return NULL; |
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ptl2 = (pte_t *) PA2KA(GET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page))); |
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if (GET_PTL3_FLAGS(ptl2, PTL2_INDEX(page)) & PAGE_NOT_PRESENT) |
return NULL; |
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ptl3 = (pte_t *) PA2KA(GET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page))); |
|
return &ptl3[PTL3_INDEX(page)]; |
return page_operations->mapping_find(page, root); |
} |