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-rw-r--r--memlayout.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/memlayout.h b/memlayout.h
index 79429a9..ad4fda2 100644
--- a/memlayout.h
+++ b/memlayout.h
@@ -1,6 +1,7 @@
// Memory layout
#define EXTMEM 0x100000 // Start of extended memory
+#define PHYSTOP 0xE000000 // Top physical memory (too hard to get from E820)
#define DEVSPACE 0xFE000000 // Other devices are at high addresses
// Key addresses for address space layout (see kmap in vm.c for the layout)