blob: 492d4711ea20ef26a54432fa21f8be73baf7031f (
plain)
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
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
#define FOOLOS_MODULE_NAME "kmalloc"
#include "kmalloc.h"
#include "kernel.h"
#include "lib/logger/log.h"
static uint8_t data[KMALLOC_MEM_SIZE]; // bytes
static uint32_t next;
static uint32_t first;
static uint8_t init=0;
// will be initialized on first call to kballoc() //
static void kmallocinit()
{
next=&(data[0]);
first=next;
//TODO: optionally tell gcc to align this itself.
if(next%4096)
{
next+=4096;
next/=4096;
next*=4096;
}
//
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"kmalloc_init: 0x%08X",next);
init=1;
}
// kernel block memory allocation //
uint32_t kballoc(uint32_t size)
{
size*=4096;
if(!init)kmallocinit();
uint32_t old=next;
next+=size;
if(next>=first+KMALLOC_MEM_SIZE)
{
panic(FOOLOS_MODULE_NAME,"kballoc ran out of memory! maybe increase KMALLOC_MEM_SIZE in kmalloc.c?");
}
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"(%d) : 0x%08X (~%dKB left)",size,old,(KMALLOC_MEM_SIZE-next+first)/1024);
return old;
}
//TODO: allow freeing memory!!
uint32_t kbfree(uint32_t pos)
{
panic(FOOLOS_MODULE_NAME,"kbfree NOT IMPLEMENTED YET");
}
|
