feat: (vm) memory mapping support: mmap/munmap

[lunaix-os.git] / lunaix-os / kernel / mm / region.c

diff --git a/lunaix-os/kernel/mm/region.c b/lunaix-os/kernel/mm/region.c
index 19355832762035b8e94a34c87d487ac5510e1528..0e0982d7d2d9b0915ed6065c7fb90deb79c000e0 100644 (file)
--- a/lunaix-os/kernel/mm/region.c
+++ b/lunaix-os/kernel/mm/region.c
@@ -1,47 +1,71 @@
 #include <lunaix/mm/region.h>
-#include <lunaix/mm/kalloc.h>
-#include <lunaix/process.h>
+#include <lunaix/mm/valloc.h>
 
-void region_add(struct proc_info* proc,unsigned long start, unsigned long end, unsigned int attr) {
-    struct mm_region* region = lxmalloc(sizeof(struct mm_region));
+struct mm_region*
+region_add(struct llist_header* lead,
+           unsigned long start,
+           unsigned long end,
+           unsigned int attr)
+{
+    struct mm_region* region = valloc(sizeof(struct mm_region));
 
-    *region = (struct mm_region) {
-        .attr = attr,
-        .end = end,
-        .start = start
-    };
+    *region = (struct mm_region){ .attr = attr, .end = end, .start = start };
 
-    if (!proc->mm.regions) {
-        llist_init_head(&region->head);
-        proc->mm.regions = region;
+    if (llist_empty(lead)) {
+        llist_append(lead, &region->head);
+        return region;
     }
-    else {
-        llist_append(&proc->mm.regions->head, &region->head);
+
+    struct mm_region *pos, *n;
+    llist_for_each(pos, n, lead, head)
+    {
+        if (start >= pos->end && end <= n->start) {
+            break;
+        }
     }
+
+    llist_insert_after(&pos->head, &region->head);
+    return region;
 }
 
-void region_release_all(struct proc_info* proc) {
-    struct mm_region* head = proc->mm.regions;
+void
+region_release_all(struct llist_header* lead)
+{
     struct mm_region *pos, *n;
 
-    llist_for_each(pos, n, &head->head, head) {
-        lxfree(pos);
+    llist_for_each(pos, n, lead, head)
+    {
+        vfree(pos);
+    }
+}
+
+void
+region_copy(struct llist_header* src, struct llist_header* dest)
+{
+    if (!src) {
+        return;
     }
 
-    proc->mm.regions = NULL;
+    struct mm_region *pos, *n;
+
+    llist_for_each(pos, n, src, head)
+    {
+        region_add(dest, pos->start, pos->end, pos->attr);
+    }
 }
 
-struct mm_region* region_get(struct proc_info* proc, unsigned long vaddr) {
-    struct mm_region* head = proc->mm.regions;
-    
-    if (!head) {
+struct mm_region*
+region_get(struct llist_header* lead, unsigned long vaddr)
+{
+    if (llist_empty(lead)) {
         return NULL;
     }
 
     struct mm_region *pos, *n;
 
-    llist_for_each(pos, n, &head->head, head) {
-        if (vaddr >= pos->start && vaddr < pos->end) {
+    llist_for_each(pos, n, lead, head)
+    {
+        if (pos->start <= vaddr && vaddr < pos->end) {
             return pos;
         }
     }