blob: 4d9dbc1a96475e5e8ff4b0fdfb5d2affaa3eb6b7 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
#include "memory.h"
#include "zone.h"
#include "jove.h"
void
pm_reserve(physptr_t start, physptr_t end)
{
size_t zone = pm_zone_for(start);
size_t limit = pm_zone_bound_upper(zone);
if(end > limit) {
pm_reserve(limit, end);
end = limit;
}
pm_zone_resv(MEM_ZONE_STANDARD, start, end);
}
void
pm_release(physptr_t start, physptr_t end)
{
size_t zone = pm_zone_for(start);
size_t limit = pm_zone_bound_upper(zone);
if(end > limit) {
pm_release(limit, end);
end = limit;
}
pm_zone_free(MEM_ZONE_STANDARD, start, end);
}
physptr_t
pm_alloc(size_t pages)
{
if(pm_zone_pages_free(MEM_ZONE_HIGHER) >= pages)
return pm_zone_alloc(MEM_ZONE_HIGHER, pages);
if(pm_zone_pages_free(MEM_ZONE_STANDARD) >= pages)
return pm_zone_alloc(MEM_ZONE_STANDARD, pages);
kpanic("Kernel ran out of physical memory!\n");
}
|