ptos: pm: Add frame allocation and reclamation

Signed-off-by: Chloe M <chloe@yiffware.org>
2026-07-10 19:07:11 -04:00
parent 92f4720898
commit 79bbbc074b
2 changed files with 159 additions and 3 deletions
@@ -12,6 +12,9 @@
 #include <ptdef.h>
 #include <hal/page.h>

+/* Used when out of memory */
+#define PFN_ERROR 0
+
 /* Page frame number type */
 typedef USIZE MM_PFN;

@@ -29,4 +32,18 @@ typedef USIZE MM_PFN;
 */
 VOID MmPmInit(VOID);

+/*
+ * Request a single frame of memory
+ *
+ * Returns PFN_ERROR on failure
+ */
+MM_PFN MmRequestFrame(VOID);
+
+/*
+ * Reclaim a single frame of memory
+ *
+ * @Pfn:  Page frame number to reclaim
+ */
+VOID MmReclaimFrame(MM_PFN Pfn);
+
 #endif  /* !_MM_PM_H_ */