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
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
#include "usr/tasking.h"
#include "mem/memory.h"
#include "io/log.h"
#include "lib/hashtable.h"
#include "lib/string.h"
#include "paging.h"
#include "cpu.h"
#include "tss.h"
struct TaskBody {
struct Task base;
struct Registers state;
};
struct Task *task_current;
uintptr_t _kernel_task_bp = 0;
//static struct SLinkedList s_tasks;
static struct HashTable s_tasks;
static struct SlabCache s_task_cache;
static struct SlabCache s_kbp_cache;
static tid_t s_task_id_next = 1;
static size_t
s_task_hash_func(const void* tid, size_t _)
{
return (tid_t)tid;
}
void
tasking_setup(void)
{
hashtable_new(&s_tasks, struct TaskBody*, tid_t);
s_tasks.hash_function = s_task_hash_func;
mem_slabcache_new(&s_task_cache, "tasks", sizeof(struct TaskBody));
mem_slabcache_new(&s_kbp_cache, "kernel stacks", 4096);
struct TaskBody *ktask = mem_slab_alloc(&s_task_cache);
*ktask = (struct TaskBody){
.base.id = s_task_id_next++,
.base.kbp = ((uintptr_t)mem_slab_alloc(&s_kbp_cache)) + 0xFF0,
.base.perm = (size_t)-1,
.base.pd = current_page_directory
};
hashtable_insert(&s_tasks, 0, ktask);
task_current = (struct Task*)ktask;
tss_set_rsp(0, task_current->kbp);
_kernel_task_bp = task_current->kbp;
}
struct Task*
task_new(struct Task *parent)
{
struct TaskBody *new = mem_slab_alloc(&s_task_cache);
memcpy(new, parent, sizeof(struct TaskBody));
new->base.id = s_task_id_next++;
uintptr_t ksp_base = (uintptr_t)mem_slab_alloc(&s_kbp_cache);
new->base.kbp = ksp_base + 0xFFF;
new->base.perm = parent->perm;
hashtable_insert(&s_tasks, (void*)new->base.id, new);
return (struct Task*)new;
}
struct Task*
task_get(tid_t id)
{
struct Task **task = hashtable_get(&s_tasks, (void*)id, struct Task*);
if(task == NULL) return NULL;
return *task;
}
void
task_free(struct Task *task)
{
struct TaskBody *body = (struct TaskBody*)task;
task->pd->ref--;
task->kbp -= 0xFFF;
mem_slab_free(&s_kbp_cache, (void*)(task->kbp));
klogf("Need impl for task_free\n");
}
|