1 files changed, 43 insertions, 0 deletions
diff --git a/sw/z80/kernel/memory.c b/sw/z80/kernel/memory.c
new file mode 100644
index 0000000..f174906
--- /dev/null
+++ b/sw/z80/kernel/memory.c
@@ -0,0 +1,43 @@
+#include "memory.h"
+
+struct page pages_table[PAGES_MAX_COUNT];
+
+int mmu_write_table(void)
+{
+    int i;
+
+    for (i = 0; i < PAGES_MAX_COUNT; i++) {
+        if (pages_table[i].used) {
+            // write to mmu table
+        }
+    }
+
+    return 0;
+}
+
+int page_map(int page, int pid, uint16_t addr)
+{
+    if (page >= PAGES_MAX_COUNT)
+        return -1;
+
+    if (pages_table[page].used)
+        return -2;
+
+    pages_table[page].addr = addr;
+    pages_table[page].pid = pid;
+
+    pages_table[page].used = 1;
+    return 0;
+}
+
+int page_unmap(int page)
+{
+    if (page >= PAGES_MAX_COUNT)
+        return -1;
+
+    if (pages_table[page].used == 0)
+        return -2;
+
+    pages_table[page].used = 0;
+    return 0;
+}