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Implemented VMM!

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Tom-on
2025-04-08 15:09:57 +02:00
parent ced6cb250f
commit 7c2fcd8e9f
9 changed files with 139 additions and 54 deletions
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kernel/src/bitmap.c
+9 -7
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@@ -3,10 +3,15 @@
#include <bitmap.h>
void* bmap_ptr(bitmap_t* map, size_t bit) {
return (void*)(map->membase + bit * BLOCK_SIZE);
}
void bmap_set(bitmap_t* map, size_t bit, int val) {
uint32_t* p = (uint32_t*)map->map;
if (val) p[bit / 32] |= (1 << (bit % 32));
else p[bit / 32] &= ~(1 << (bit % 32));
map->used += (val) ? 1 : -1;
}
int bmap_get(bitmap_t* map, size_t bit) {
@@ -15,13 +20,10 @@ int bmap_get(bitmap_t* map, size_t bit) {
}
void bmap_setarea(bitmap_t* map, size_t base, size_t len, int val) {
uint32_t align = base / BLOCK_SIZE;
uint32_t count = len / BLOCK_SIZE;
uint32_t align = dceil(base, BLOCK_SIZE);
uint32_t count = dceil(len, BLOCK_SIZE);
while (count-- > 0) {
bmap_set(map, align++, val);
map->used += (val) ? 1 : -1;
}
while (count-- > 0) bmap_set(map, align++, val);
}
void bmap_setall(bitmap_t* map, int val) {
@@ -39,7 +41,7 @@ size_t bmap_findarea(bitmap_t* map, size_t len, int val) {
if (bmap_get(map, i) == val) found++;
else found = 0;
if (found >= len) return i - found;
if (found >= len) return i - found + 1;
}
return BMAP_NOT_FOUND;