X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/2d21ac55c334faf3a56e5634905ed6987fc787d4..99c3a10404e5d1ef94397ab4df5a8b74711fc4d3:/osfmk/i386/i386_lowmem.h

diff --git a/osfmk/i386/i386_lowmem.h b/osfmk/i386/i386_lowmem.h
index ffbb00b57..97fa06012 100644
--- a/osfmk/i386/i386_lowmem.h
+++ b/osfmk/i386/i386_lowmem.h
@@ -32,10 +32,25 @@
 
 #ifdef __APPLE_API_PRIVATE
 
-#define I386_LOWMEM_RESERVED	    0x18
+/*
+ * The kernel better be statically linked at VM_MIN_KERNEL_ADDRESS + 0x100000
+ */
+#define I386_KERNEL_IMAGE_BASE_PAGE	0x100
+
+#if defined(__i386__)
+#define I386_LOWMEM_RESERVED		0x18
 
-#define I386_HIB_PAGETABLE	    0x13
-#define I386_HIB_PAGETABLE_COUNT    5
+#define I386_HIB_PAGETABLE		0x13
+#define I386_HIB_PAGETABLE_COUNT	5
+
+#elif defined(__x86_64__)
+/* For K64, only 3 pages are reserved
+ * - physical page zero, a gap page, and then real-mode-bootstrap/lowGlo.
+ * Note that the kernel virtual address 0xffffff8000002000 is re-mapped
+ * to the low globals and that physical page, 0x2000, is used by the bootstrap.
+ */
+#define I386_LOWMEM_RESERVED		3
+#endif
 
 #endif /* __APPLE_API_PRIVATE */