1 files changed, 48 insertions, 0 deletions
diff --git a/sw/z80/kernel/include/memory.h b/sw/z80/kernel/include/memory.h
new file mode 100644
index 0000000..5bca5a5
--- /dev/null
+++ b/sw/z80/kernel/include/memory.h
@@ -0,0 +1,48 @@
+#ifndef __MEMORY_H__
+#define __MEMORY_H__
+
+#include "types.h"
+#include "devices.h"
+
+/* maximum number of pages on the system */
+#define PAGES_MAX_COUNT 32
+
+/* in our system there are only 16 pages since only 64KB can be addressed
+ * to optimize the memory management in ROM and RAM only pages from this set
+ * shall be used
+ */
+// ROM
+#define ADDR_PAGE_0  0x0000
+#define ADDR_PAGE_1  0x1000
+#define ADDR_PAGE_2  0x2000
+#define ADDR_PAGE_3  0x3000
+// IOSPACE
+#define ADDR_PAGE_4  0x4000
+#define ADDR_PAGE_5  0x5000
+#define ADDR_PAGE_6  0x6000
+#define ADDR_PAGE_7  0x7000
+// RAM
+#define ADDR_PAGE_8  0x8000
+#define ADDR_PAGE_9  0x9000
+#define ADDR_PAGE_10 0xA000
+#define ADDR_PAGE_11 0xB000
+#define ADDR_PAGE_12 0xC000
+#define ADDR_PAGE_13 0xD000
+#define ADDR_PAGE_14 0xE000
+#define ADDR_PAGE_15 0xF000
+
+struct page
+{
+	uint used :1;
+	uint8_t pid;     // process owner of the page
+    uint16_t addr;   // physical address
+};
+
+extern struct page pages_table[PAGES_MAX_COUNT];
+
+int mmu_write_table(void);
+
+int page_map(int page, int pid, uint16_t addr);
+int page_unmap(int page);
+
+#endif // __MEMORY_H__
+\ No newline at end of file