1 files changed, 26 insertions, 0 deletions
diff --git a/memlayout.h b/memlayout.h
new file mode 100644
index 0000000..3958062
--- /dev/null
+++ b/memlayout.h
@@ -0,0 +1,26 @@
+// Memory layout
+
+#define PGSIZE          4096            // bytes mapped by a page
+#define PGSHIFT         12              // log2(PGSIZE)
+
+#define KSTKSIZE        (8*PGSIZE)              // size of a kernel stack
+
+#define IOSPACEB  0x0A0000 // begin IO space
+#define IOSPACEE  0x100000  // end IO space
+#define PHYSTOP   0xE000000 // use phys mem up to here as free pool
+
+// Key addresses for address space layout (see kmap in vm.c for the actual layout)
+#define KERNBASE 0xF0000000  // First kernel virtual address
+#define USERTOP  (KERNBASE-PGSIZE)  // Highest user virtual address
+#define KERNLINK 0xF0100000   // Address where kernel is linked
+
+#ifndef __ASSEMBLER__
+
+static inline uint v2p(void *a) { return (uint) a  - KERNBASE; }
+static inline void *p2v(uint a) { return (void *) a + KERNBASE; }
+
+#endif
+
+#define V2P(a) ((uint) a - KERNBASE)
+#define P2V(a) ((void *) a + KERNBASE)
+