split syscall info into api subfolder. untyped syscalls

3 files changed, 65 insertions, 16 deletions

diff --git a/hal/memory.h b/hal/memory.h
index 4d866d0..659263c 100644
--- a/hal/memory.h
+++ b/hal/memory.h
@@ -1,16 +1,24 @@
 #ifndef _JOVE_HAL_MEMORY_H
 #define _JOVE_HAL_MEMORY_H 1
 
-#include <stddef.h>
-#include <stdint.h>
+#include "obj.h"
 
 typedef struct jove_obj_untyped
 {
     size_t limit;
 } jove_untyped_t;
 
+#define JOVE_UNTYPED_MINSIZE 0x10
+
 void mem_setup_untyped(void);
 
 void *phys_tovirt(uintptr_t phys);
 
+size_t untyped_size(jove_owned_obj_t *tgt);
+size_t untyped_align(jove_owned_obj_t *tgt);
+
+int untyped_split(jove_owned_obj_t *tgt, jove_owned_obj_t *dst, size_t bytes);
+int untyped_merge(jove_owned_obj_t *a, jove_owned_obj_t *b);
+int untyped_retype(jove_owned_obj_t *tgt, uint8_t newtype);
+
 #endif
diff --git a/hal/obj.h b/hal/obj.h
index 93825fd..7a6ab76 100644
--- a/hal/obj.h
+++ b/hal/obj.h
@@ -3,20 +3,7 @@
 
 #include <stddef.h>
 
-enum
-{
-    JOVE_OBJ_NONE = 0,
-    JOVE_OBJ_UNTYPED,
-    JOVE_OBJ_OBJDIR,
-    JOVE_OBJ_PAGEDIR,
-    JOVE_OBJ_PROCESSOR,
-    JOVE_OBJ_PROCESS,
-    JOVE_OBJ_PAGEFRAME,
-    JOVE_OBJ_INITRD_FILE,
-    JOVE_OBJ_FRAMEBUFFER,
-    JOVE_OBJ_VIRTTERM,
-    JOVE_OBJ_MESSAGE
-};
+#include "api/obj.h"
 
 #ifdef __x86_64__
 #include "arch/x86_64/hal/obj.h"
diff --git a/hal/untyped.c b/hal/untyped.c
new file mode 100644
index 0000000..243f3ec
--- /dev/null
+++ b/hal/untyped.c
@@ -0,0 +1,54 @@
+#include "arch/x86_64/hal/obj.h"
+#include "jove.h"
+#include "memory.h"
+
+size_t
+untyped_size(jove_owned_obj_t *tgt)
+{
+    return ((jove_untyped_t*)obj_deref(tgt))->limit;
+}
+
+size_t
+untyped_align(jove_owned_obj_t *tgt)
+{
+    return (uintptr_t)obj_deref(tgt) & 0xFFF;
+}
+
+int 
+untyped_split(jove_owned_obj_t *tgt, jove_owned_obj_t *dst, size_t bytes)
+{
+    jove_untyped_t *tgt_untyped = obj_deref(tgt);
+    if(bytes < JOVE_UNTYPED_MINSIZE) return EBADARG;
+    if(tgt_untyped->limit - bytes < JOVE_UNTYPED_MINSIZE) return ETOOSMALL;
+
+    tgt_untyped->limit -= bytes;
+    obj_settype(dst, JOVE_OBJ_UNTYPED);
+    obj_setvalue(dst, (uintptr_t)tgt_untyped + tgt_untyped->limit);
+
+    jove_untyped_t *dst_untyped = obj_deref(dst);
+    dst_untyped->limit = bytes;
+    return 0;
+}
+
+int
+untyped_merge(jove_owned_obj_t *a, jove_owned_obj_t *b)
+{
+    jove_untyped_t *a_untyped = obj_deref(a);
+    jove_untyped_t *b_untyped = obj_deref(b);
+    if((uintptr_t)a_untyped + a_untyped->limit == (uintptr_t)b_untyped) {
+        return EBADARG;
+    }
+    if((uintptr_t)b_untyped + b_untyped->limit == (uintptr_t)a_untyped) {
+        return untyped_merge(b, a);
+    }
+
+    a_untyped->limit += b_untyped->limit;
+    obj_settype(b, JOVE_OBJ_NONE);
+    return 0;
+}
+
+int untyped_retype(jove_owned_obj_t *tgt, uint8_t newtype)
+{
+    obj_settype(tgt, newtype);
+    return 0;
+}